@font-face{font-family:"Creato Display";src:url(/assets/creato-regular.woff2) format("woff2");font-display:swap}
@font-face{font-family:"Creato Display";font-style:italic;src:url(/assets/creato-italic.woff2) format("woff2");font-display:swap}
:root{--navy:#0D1D2C;--orange:#F18B15;--ivory:#EFEFE4;--paper:#FAFAF5;--soft:#3A4957;--sans:"Creato Display",system-ui,-apple-system,"Segoe UI",sans-serif;--math:"STIX Two Text","Cambria Math","Times New Roman",serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ivory);color:var(--navy);font:400 1.125rem/1.5 var(--sans);font-synthesis:none}
img,svg{display:block}
a{color:inherit}
a:focus-visible{outline:3px solid currentColor;outline-offset:3px}
.wrap{width:min(100%,1120px);margin:auto;padding-inline:16px}
@media(min-width:720px){.wrap{padding-inline:32px}}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.ph{margin:0;font-size:inherit;font-weight:400}
.hero{background:var(--orange)}
.top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding-block:20px}
.nav{display:flex;flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:0 4px}
.nav>a{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;text-decoration:none;font-size:1rem}
.nav>a:not(.lang):hover,.nav>a[aria-current]{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
.logo{display:block;width:88px;color:var(--navy)}
.logo svg{width:100%;height:auto}
.nav>.lang{margin-left:6px;padding:0 12px;border:2px solid var(--navy);border-radius:12px;text-decoration:none}
.nav>.lang:hover{background:var(--navy);color:var(--ivory)}
.hero-grid{display:grid;gap:32px;padding-block:24px 0;align-items:end}
.h1svg{width:min(100%,620px);height:auto}
.lede{margin:24px 0 28px;max-width:30em;font-size:clamp(1.2rem,2.5vw,1.45rem);line-height:1.35}
.cta{display:inline-flex;align-items:center;justify-content:center;min-height:56px;padding:12px 28px;border-radius:14px;background:var(--navy);color:var(--ivory);font-size:1.125rem;text-decoration:none}
.cta:hover{background:#1c3347}
.note{margin:14px 0 40px;font-size:1rem}
.hero-art{width:min(82%,340px);height:auto;margin-inline:auto}
@media(min-width:880px){.hero-grid{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);padding-top:32px}.hero-art{width:100%;max-width:440px;margin:0 0 0 auto}.note{margin-bottom:72px}}
.sec{padding-block:64px}
.paper{background:var(--paper)}
.h2svg{height:clamp(38px,7vw,62px);width:auto;max-width:100%}
.sub{margin:8px 0 32px;color:var(--soft)}
.stairs{list-style:none;margin:0;padding:0}
.stairs li{margin-left:calc(var(--i)*min(3vw,44px));border-top:2px solid var(--navy)}
.stairs li:last-child{border-bottom:2px solid var(--navy)}
.step{display:flex;flex-direction:column;gap:4px;padding:16px 8px;text-decoration:none}
.step:hover{background:var(--orange)}
.step:hover .det{color:var(--navy)}
.expr{font-family:var(--math);font-size:clamp(1.55rem,5.2vw,2.5rem);line-height:1.15;white-space:nowrap}
.name{display:block;font-size:1.15rem;line-height:1.3}
.det{display:block;color:var(--soft);font-size:1rem;line-height:1.35}
@media(min-width:780px){.step{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);align-items:center;gap:24px}}
.seq{list-style:decimal inside;margin:32px 0 0;padding:0;display:grid;gap:40px}
.seq li{font-size:1.3rem;line-height:1.25}
.seq li::marker{font-family:var(--math);font-style:italic}
.seq img{width:150px;height:150px;object-fit:contain;object-position:left bottom;margin-bottom:16px}
.seq h3{display:inline;font-size:1.3rem;font-weight:400}
.seq p{margin:8px 0 0;font-size:1.0625rem;line-height:1.45;color:var(--soft);max-width:28em}
@media(min-width:820px){.seq{grid-template-columns:repeat(3,1fr);gap:32px}}
.two{display:grid;gap:28px;margin-top:32px}
.two h3{margin:0 0 4px;font-size:1.3rem;font-weight:400;line-height:1.25}
.two p{margin:0;color:var(--soft);max-width:30em}
@media(min-width:760px){.two{grid-template-columns:1fr 1fr;gap:36px 56px}}
.founder{margin:40px 0 0;padding-top:20px;border-top:2px solid var(--navy);font-size:1.15rem;font-style:italic}
.close{background:var(--navy);color:var(--ivory);padding-block:64px}
.close p{margin:10px 0 28px}
.close .cta{background:var(--orange);color:var(--navy)}
.close .cta:hover{background:#ffa43d}
.close-grid{display:grid;gap:40px;align-items:center}
.close-logo{width:130px;color:var(--orange)}
.close-logo svg{width:100%;height:auto}
@media(min-width:760px){.close-grid{grid-template-columns:1fr auto}.close-logo{width:170px}}
footer{background:var(--navy);color:var(--ivory);font-size:1rem;padding-bottom:32px}
.row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px}
.row>*{padding-top:16px}
footer .row{border-top:0}

.skip{position:absolute;left:-999px;top:8px;background:var(--navy);color:var(--ivory);padding:10px 14px;border-radius:8px;z-index:2}
.skip:focus{left:8px}
.note-gap{height:48px}
.hero-sm .h1svg{width:min(100%,480px)}
.hero-sm .hero-art{width:min(62%,260px)}
@media(min-width:880px){.hero-sm .hero-art{width:100%;max-width:320px}.note-gap{height:72px}}
.hero-text{display:block;padding-block:24px 48px}
.h1one{width:auto;height:clamp(50px,10vw,92px);max-width:100%}
.big{margin:12px 0 0;max-width:34em;font-size:clamp(1.2rem,2.4vw,1.4rem);line-height:1.4}
.links{display:flex;flex-wrap:wrap;gap:8px 28px;margin:24px 0 0}
.links a,.founder a,.prose a{text-underline-offset:3px}
.links a{display:inline-flex;align-items:center;min-height:44px}
.prs{border-top:2px solid var(--navy)}
.mt{margin-top:28px}
.pr{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 4px;border-bottom:2px solid var(--navy)}
.prn{margin:0;font-size:clamp(1.25rem,3vw,1.6rem);font-weight:400;line-height:1.2}
.pr p{margin:4px 0 0;color:var(--soft);font-size:1rem;line-height:1.35}
.pr strong{font-weight:400;font-size:clamp(1.7rem,5vw,2.6rem);line-height:1;white-space:nowrap}
.plain{margin:24px 0 0;padding-left:1.3em;max-width:36em}
.plain li{margin-bottom:10px}
.plain li::marker{font-family:var(--math)}
.ticks{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:0;max-width:44em}
.ticks li{padding:12px 0 12px 34px;border-bottom:1.5px solid rgba(13,29,44,.28);background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23F18B15' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 13l5 5L20 6'/%3E%3C/svg%3E") left 16px/22px no-repeat}
.weeks{list-style:none;margin:0;padding:0;border-top:2px solid var(--navy)}
.weeks li{display:grid;gap:4px;padding:14px 4px;border-bottom:1.5px solid rgba(13,29,44,.28)}
.wk{color:var(--soft);font-style:italic}
@media(min-width:680px){.weeks li{grid-template-columns:130px 1fr;gap:16px}}
.prose{max-width:760px}
.prose p{margin:16px 0 0}
.legal h2{margin:32px 0 0;font-size:1.35rem;font-weight:400;line-height:1.25}
.legal h2:first-child{margin-top:0}
.legal p{margin-top:8px;color:var(--soft)}
.row{flex-wrap:wrap}
.tm{margin:16px 0 0;font-size:.875rem;opacity:.82}
@media(max-width:560px){.top{flex-direction:row}.logo{width:70px}.nav>a{padding:0 7px;font-size:.95rem}}

.hero-sm .h1one{width:auto;max-width:100%}

.step-s:hover{background:none}
.step-s:hover .det{color:var(--soft)}
.book-grid{display:grid;gap:40px}
.tc{min-height:640px;background:#fff;border:2px solid var(--navy);border-radius:14px;overflow:hidden}
.exp{margin:0;font-size:1.5rem;font-weight:400;line-height:1.2}
.book .sub{margin-top:24px}
@media(min-width:960px){.book-grid{grid-template-columns:minmax(0,1.8fr) minmax(0,1fr);align-items:start}}

.nav{gap:0 2px}
.nav>a,.dd>summary{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 10px;text-decoration:none;font-size:1rem;cursor:pointer}
.dd{position:relative}
.dd>summary{list-style:none}
.dd>summary::-webkit-details-marker{display:none}
.dd>summary::after{content:"";width:7px;height:7px;border-right:2px solid;border-bottom:2px solid;transform:translateY(-2px) rotate(45deg);margin-left:2px}
.dd[open]>summary::after{transform:translateY(2px) rotate(225deg)}
.dd>summary:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
.dd>summary:focus-visible{outline:3px solid currentColor;outline-offset:2px}
.lang-dd>summary{border:2px solid var(--navy);border-radius:12px;margin-left:6px;padding:0 10px}
.lang-dd>summary:hover{background:var(--navy);color:var(--ivory);text-decoration:none}
.menu{position:absolute;z-index:5;top:calc(100% + 6px);left:0;min-width:260px;background:var(--ivory);border:2px solid var(--navy);border-radius:12px;padding:6px;box-shadow:0 6px 0 var(--navy)}
.menu-r{left:auto;right:0;min-width:150px}
.menu a{display:flex;align-items:center;min-height:42px;padding:6px 10px;border-radius:8px;text-decoration:none;font-size:1rem;line-height:1.2}
.menu a:hover{background:var(--orange)}
.menu a[aria-current]{font-style:italic}
.menu a[aria-current]::after{content:"✓";margin-left:auto;font-style:normal}
.dd-all{border-top:1.5px solid rgba(13,29,44,.3);border-radius:0 0 8px 8px!important;margin-top:4px;text-decoration:underline!important}
@media(max-width:640px){.top{flex-wrap:wrap}.nav{width:100%;justify-content:flex-start;margin-left:-8px;gap:0}.nav>a,.dd>summary{padding:0 7px;font-size:.95rem}.lang-dd{margin-left:auto}.lang-dd>summary{margin-left:0}.menu{min-width:230px}}
.tk2{display:grid;max-width:none}
@media(min-width:720px){.tk2{grid-template-columns:1fr 1fr;column-gap:40px}}
.three{display:grid;gap:28px;margin-top:32px}
.three h3{margin:0 0 4px;font-size:1.3rem;font-weight:400;line-height:1.25}
.three p{margin:0;color:var(--soft)}
@media(min-width:820px){.three{grid-template-columns:repeat(3,1fr);gap:40px}}
.fqs{margin-top:28px;border-top:2px solid var(--navy)}
.fq{border-bottom:1.5px solid rgba(13,29,44,.3)}
.fq summary{cursor:pointer;padding:14px 4px;font-size:1.15rem;list-style-position:inside}
.fq p{margin:0 0 16px;padding:0 4px;color:var(--soft);max-width:44em}
.rel{display:flex;flex-wrap:wrap;gap:6px 18px;margin:28px 0 0;font-size:1rem}
.lsts{border-top:2px solid var(--navy)}
.lst{display:grid;gap:4px;padding:18px 8px;border-bottom:2px solid var(--navy);text-decoration:none}
.lst:hover{background:var(--orange)}
.lst:hover .det{color:var(--navy)}
.lst .name{font-size:1.35rem}
@media(min-width:780px){.lst{grid-template-columns:1fr 1.5fr;align-items:center;gap:24px}}
.h1tool{width:auto;height:clamp(40px,7vw,68px);max-width:100%}
.hero-grid:has(.h1tool){padding-block:4px 28px}
.hero-grid:has(.h1tool) .lede{margin:12px 0 0}
.tool{padding-block:40px 56px}
.two-a{display:grid;gap:40px}
@media(min-width:820px){.two-a{grid-template-columns:1.2fr 1fr;gap:64px}}
.two-a .cta{margin-top:12px}
input,select{font:inherit;color:var(--navy);width:100%;min-height:50px;padding:8px 12px;background:#fff;border:2px solid var(--navy);border-radius:10px}
input:focus-visible,select:focus-visible,button:focus-visible{outline:3px solid var(--orange);outline-offset:2px}
.tf{display:grid;gap:14px;align-items:end;margin-bottom:20px}
.tf label{display:grid;gap:6px}
.tf .cta{border:0;font:inherit;cursor:pointer;width:100%}
@media(min-width:760px){.tf{grid-template-columns:minmax(0,2fr) minmax(0,1fr) auto}.tf .cta{width:auto;min-height:50px}#sf:has(>label:only-of-type){grid-template-columns:1fr auto}}
.result{min-height:92px;padding:20px;background:#fff;border:2px solid var(--navy);border-radius:14px;overflow-x:auto}
.result:empty{display:none}
.result h2{margin:0 0 6px;font:inherit;color:var(--soft)}
.result.bad{color:#9A1B28;min-height:0}
.math{font-size:1.25rem;overflow-x:auto}
.chk{margin:8px 0 0;font-size:.95rem;color:var(--soft)}
.fr{padding:6px 0}
.fr .katex{font-size:1.5rem}
.exl{margin:24px 0 8px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.chip,.btn2{font:inherit;font-size:1rem;color:var(--navy);min-height:42px;padding:6px 14px;background:transparent;border:2px solid var(--navy);border-radius:10px;cursor:pointer}
.chip:hover,.btn2:hover{background:var(--orange)}
.btn2:disabled{opacity:.4;cursor:not-allowed}
.gw{display:grid;gap:16px}
@media(min-width:900px){.gw{grid-template-columns:320px 1fr}}
.fn{display:grid;grid-template-columns:14px 1fr 42px;gap:8px;align-items:center;margin-bottom:10px}
.fn .sw{width:14px;height:14px;border-radius:50%}
.fn label{display:flex;align-items:center;gap:8px}
.fn .y{font-family:var(--math);white-space:nowrap}
.fn .x{height:42px;font-size:1.3rem;background:none;border:2px solid var(--navy);border-radius:10px;cursor:pointer;color:var(--navy)}
.fn .err{grid-column:2/4;margin:0;color:#9A1B28;font-size:.95rem}
.fn .err:empty{display:none}
.cvw{position:relative;border:2px solid var(--navy);border-radius:14px;overflow:hidden;background:#fff}
#gc{display:block;width:100%;height:clamp(380px,62vh,620px);cursor:grab}
#gc:active{cursor:grabbing}
.gb{position:absolute;top:10px;right:10px;display:flex;gap:6px}
.gb .btn2{background:#fff}
.gb .btn2:hover{background:var(--orange)}
.ic{width:42px;padding:0;font-size:1.25rem}

/* v10 polish */
.band{background:var(--navy);color:var(--ivory)}
.band ul{list-style:none;margin:0;padding:16px 0;display:grid;grid-template-columns:repeat(2,1fr);gap:8px 20px;font-size:1rem}
@media(min-width:820px){.band ul{display:flex;justify-content:space-between}}
.cards{display:grid;gap:16px;margin-top:24px}
.c3{grid-template-columns:1fr}
@media(min-width:680px){.c3{grid-template-columns:1fr 1fr}}
@media(min-width:980px){.c3{grid-template-columns:repeat(3,1fr)}}
.card{display:flex;flex-direction:column;gap:8px;padding:22px;background:#fff;border:2px solid var(--navy);border-radius:16px;text-decoration:none;box-shadow:0 5px 0 var(--navy);transition:transform .12s,box-shadow .12s}
a.card:hover{transform:translateY(-3px);box-shadow:0 8px 0 var(--orange)}
.card img{width:48px;height:48px;object-fit:contain;object-position:left center;margin-bottom:4px}
.card-t{font-size:1.28rem;line-height:1.22}
.tag{font-size:.9rem;font-style:italic;color:var(--soft)}
.card .det{font-size:1rem}
.card-s{box-shadow:none}
.card-s h3{margin:0;font-size:1.25rem;font-weight:400;line-height:1.25}
.card-s p{margin:0;color:var(--soft)}
.card-o{background:var(--orange);color:var(--navy)}
.card-o p{color:var(--navy)}
.card-l{box-shadow:none;padding:16px 18px}
.units{display:grid;gap:0 40px;margin-top:8px;border-top:2px solid var(--navy)}
@media(min-width:760px){.units{grid-template-columns:1fr 1fr}}
.unit{padding:16px 2px;border-bottom:1.5px solid rgba(13,29,44,.28)}
.unit h3{margin:0;font-size:1.22rem;font-weight:400;line-height:1.25}
.unit p{margin:4px 0 0;color:var(--soft);font-size:1rem;line-height:1.4}
.two-b{display:grid;gap:44px;align-items:start}
@media(min-width:900px){.two-b{grid-template-columns:1.25fr 1fr;gap:56px}}
.pr-note{margin-top:20px;padding:18px;background:var(--orange);border-radius:16px}
.pr-note p{margin:0 0 8px}
.mt-s{margin-top:16px}
h2.mt{margin-top:36px}
.chips a.chip{display:inline-flex;align-items:center;text-decoration:none}
.fq{transition:none}
.fq summary:hover{color:#000}
.h2-2{height:auto;width:min(100%,320px)}
.h2-m{height:clamp(32px,4vw,44px)}
.teach{display:grid;gap:16px;margin-top:28px}
@media(min-width:780px){.teach{grid-template-columns:1fr 1fr}}
.kx{font-size:1.25rem;overflow-x:auto;padding:6px 0}
.kx .katex-display{margin:.3em 0}
.art-h{padding-block:8px 44px}
.crumb{margin:0 0 14px;font-size:1rem}
.art-t{margin:0;font-weight:400;font-size:clamp(2rem,5vw,3.4rem);line-height:1.08;letter-spacing:-.015em;max-width:18em}
.meta{margin:12px 0 0;font-size:1rem}
.art{background:var(--paper)}
.art-g{display:grid;gap:44px;align-items:start}
@media(min-width:960px){.art-g{grid-template-columns:minmax(0,1fr) 300px;gap:64px}.art-s{position:sticky;top:20px}}
.prose-a{max-width:44em;font-size:1.15rem;line-height:1.6}
.prose-a>p{margin:0 0 18px}
.prose-a h2{margin:40px 0 14px;font-size:1.65rem;font-weight:400;line-height:1.2}
.prose-a>.kx{margin:0 0 18px;padding:10px 16px;background:var(--ivory);border-radius:12px}
.ex{margin:18px 0;padding:18px 20px;background:#fff;border:2px solid var(--navy);border-radius:14px}
.ex h3{margin:0 0 8px;font-size:1.15rem;font-weight:400;line-height:1.35}
.ex p{margin:6px 0 0;color:var(--soft)}
.ex-w{background:#fff;border-color:#C93B47}
.ex-w h3{color:#9A1B28}
.ex .wr{color:var(--navy);font-size:1.2rem}
.pq{margin:0;padding-left:1.3em}
.pq li{margin-bottom:14px}
.pq details{margin-top:4px;font-size:1rem}
.pq summary{cursor:pointer;display:inline-flex;align-items:center;min-height:36px;color:var(--soft);text-decoration:underline;text-underline-offset:3px}
.pq p{margin:2px 0 0;font-size:1.15rem}
.art-s{padding:22px;background:var(--orange);border-radius:16px}
.art-s img{width:64px;height:64px;object-fit:contain;object-position:left;margin-bottom:10px}
.art-s p{margin:6px 0 14px}
.art-s .links{margin:12px 0 0}
.art-s .cta{width:100%;text-align:center}
.step{transition:background-color .12s}
.how-grid{display:grid}
.seq img{transition:none}
.art-g,.two-b,.units,.cards{grid-template-columns:minmax(0,1fr)}
@media(min-width:760px){.units{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:900px){.two-b{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr)}}
@media(min-width:960px){.art-g{grid-template-columns:minmax(0,1fr) 300px}}
@media(min-width:680px){.c3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:980px){.c3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.kx,.ex{max-width:100%}
.ex .katex-display,.prose-a .katex-display{overflow-x:auto;overflow-y:hidden;padding-bottom:4px}

/* v11 */
.card{box-shadow:none}
a.card:hover{transform:none;box-shadow:none;background:var(--orange)}
.c3 .card-s,.cards .card-l{background:none;border:0;border-top:2px solid var(--navy);border-radius:0;padding:14px 0 0}
.tg{display:grid;gap:14px;grid-template-columns:minmax(0,1fr)}
@media(min-width:860px){.tg{grid-template-columns:repeat(2,minmax(0,1fr))}.tt-g{grid-row:span 2}}
.tt{position:relative;display:flex;flex-direction:column;gap:14px;padding:24px;border-radius:20px;min-width:0}
.tt h3{margin:0;font-size:clamp(1.4rem,3vw,1.85rem);font-weight:400;line-height:1.15}
.tt h3 a{text-decoration:none}
.tt h3 a:hover{text-decoration:underline;text-underline-offset:4px}
.tt-g{background:var(--navy);color:var(--ivory);padding:0;overflow:hidden;min-height:400px;justify-content:flex-end}
.tg-plot{position:absolute;inset:0;width:100%;height:100%}
.tt-in{position:relative;display:grid;gap:12px;padding:22px;background:linear-gradient(transparent,var(--navy) 42%)}
.tt-f{display:flex;gap:8px;align-items:center}
.tt-f label{display:flex;flex:1;align-items:center;gap:8px;min-width:0}
.tt-f .y{font-family:var(--math);white-space:nowrap}
.tt-f input{min-width:0}
.tt-f .cta{border:0;font:inherit;min-height:50px;padding:8px 18px;cursor:pointer;white-space:nowrap}
.tt-s{background:var(--orange)}
.tt-s input{font-family:var(--math);font-size:1.25rem}
.ops{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:10px}
@media(min-width:520px){.ops{grid-template-columns:repeat(4,minmax(0,1fr))}}
.ops button{font:inherit;font-size:.98rem;min-height:46px;padding:4px;background:var(--navy);color:var(--ivory);border:0;border-radius:10px;cursor:pointer}
.ops button:hover{background:#21394f}
.tt.tt-f{display:flex;flex-direction:column;background:#fff;border:2px solid var(--navy)}
.mf{display:flex;align-items:center;flex-wrap:wrap;gap:10px}
.mf-p{display:grid;gap:5px;width:62px}
.mf-p input{min-height:42px;padding:2px;text-align:center;font-family:var(--math);font-size:1.25rem}
.mf-p input:first-child{border-bottom-width:3px}
.mf select{width:56px;padding:4px;text-align:center;font-size:1.3rem}
.mf-e{font-family:var(--math);font-size:1.7rem}
.mf-r{display:inline-flex;align-items:center;gap:4px;font-family:var(--math);font-size:1.7rem;min-width:50px;color:var(--navy)}
.mf-f{display:inline-grid;text-align:center}
.mf-f b{font-weight:400;padding:0 8px}
.mf-f b:first-child{border-bottom:2px solid var(--navy)}
.mf-q{color:var(--soft)}
.tt-l{margin-top:auto}
.gts{display:grid;gap:14px;grid-template-columns:minmax(0,1fr)}
@media(min-width:620px){.gts{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:980px){.gts{grid-template-columns:repeat(4,minmax(0,1fr))}}
.gt{display:flex;flex-direction:column;justify-content:space-between;gap:30px;min-height:176px;padding:20px;border-radius:18px;background:var(--navy);color:var(--ivory);text-decoration:none;overflow:hidden}
.gt:nth-child(4n+2),.gt:nth-child(4n+4){background:var(--orange);color:var(--navy)}
@media(min-width:980px){.gt:nth-child(8n+2),.gt:nth-child(8n+4),.gt:nth-child(8n+6),.gt:nth-child(8n+8){background:var(--navy);color:var(--ivory)}.gt:nth-child(8n+2),.gt:nth-child(8n+5),.gt:nth-child(8n+4),.gt:nth-child(8n+7){background:var(--orange);color:var(--navy)}}
.gt:hover .gt-n{text-decoration:underline;text-underline-offset:4px}
.gt-m{font-size:1.05rem;min-height:68px;display:flex;align-items:center;overflow:hidden}
.gt-m.expr{font-size:clamp(1.5rem,2.5vw,1.9rem)}
.gt-m .katex-display{margin:0;text-align:left}
.gt-m .katex-display>.katex{text-align:left}
.gt-n{font-size:1.2rem;line-height:1.2}
.two-b .gts{grid-template-columns:minmax(0,1fr)}
.fnd{display:flex;align-items:center;gap:16px;font-style:normal}
.fnd img{width:72px;height:72px;border-radius:50%;object-fit:cover;flex:none}
.ab{display:grid;gap:32px;align-items:start}
.ab-p{width:min(100%,380px);height:auto;border-radius:24px;border:2px solid var(--navy)}
@media(min-width:760px){.ab{grid-template-columns:380px minmax(0,1fr);gap:56px}}
.ab .prose{max-width:none}
.h1one,.h1tool{display:block}

.tt-g .cta{background:var(--orange);color:var(--navy)}
.tt-g .cta:hover{background:#ffa43d}
.tt-in{padding-top:70px;background:linear-gradient(transparent,var(--navy) 38%)}
.tt.tt-f{align-items:stretch}
.tt.tt-f h3{text-align:left}
.mf{justify-content:flex-start}
.tt-l{align-self:flex-start}

/* v12 calculator */
.ws{background:#fff;border:2px solid var(--navy);border-radius:20px;overflow:hidden}
.ws-top{display:flex;justify-content:space-between;align-items:stretch;gap:10px;flex-wrap:wrap;background:var(--navy);padding:8px 8px 0}
.kb-tabs{display:flex;gap:2px}
.kb-t{font:inherit;font-size:1rem;min-height:42px;padding:0 14px;color:var(--ivory);background:none;border:0;border-radius:10px 10px 0 0;cursor:pointer}
.kb-t[aria-selected=true]{background:var(--ivory);color:var(--navy)}
.ws-g{display:inline-flex;align-items:center;gap:6px;min-height:36px;margin:0 6px 6px;padding:0 12px;font-size:.98rem;color:var(--navy);background:var(--orange);border-radius:10px;text-decoration:none}
.kb{background:var(--ivory);padding:10px;border-bottom:2px solid var(--navy)}
.kb-p{display:flex;flex-wrap:wrap;gap:6px}
.kb-p[hidden]{display:none}
.kk{min-width:50px;height:46px;padding:0 10px;background:#fff;border:1.5px solid var(--navy);border-radius:10px;color:var(--navy);font-size:1rem;cursor:pointer}
.kk:hover{background:var(--orange)}
math-field{display:block;width:100%;font-size:clamp(1.6rem,3.5vw,2.3rem);color:var(--navy);background:#fff;border:0;outline:0}
#mf{min-height:170px;padding:28px 24px}
math-field::part(menu-toggle){display:none}
@media(hover:hover){math-field::part(virtual-keyboard-toggle){display:none}}
.ws-b{display:flex;justify-content:flex-end;gap:10px;padding:12px;border-top:1.5px solid rgba(13,29,44,.2)}
.ws-c{font:inherit;min-height:50px;padding:0 18px;background:none;border:2px solid var(--navy);border-radius:12px;cursor:pointer;color:var(--navy)}
.ws-b .cta{border:0;font:inherit;min-height:50px;cursor:pointer}
#res{margin-top:16px}
.result .alt{margin:6px 0 0}
.acts{margin-top:12px}
.chip-g{display:inline-flex;align-items:center;text-decoration:none;background:var(--orange)}
.gapp{height:100dvh;display:flex;flex-direction:column;overflow:hidden;background:var(--ivory)}
.gbar{display:flex;align-items:center;gap:14px;padding:8px 14px;background:var(--orange)}
.gbar .logo{width:48px}
.gbar h1{margin:0;font-size:1.25rem;font-weight:400}
.gbk{margin-left:auto;font-size:1rem}
.gmain{flex:1;min-height:0;display:grid;grid-template-rows:auto minmax(0,1fr)}
.gside{padding:12px;background:var(--ivory);overflow:auto;max-height:34vh}
.gapp .cvw{border:0;border-radius:0;min-height:0}
.gapp #gc{height:100%}
.fn{grid-template-columns:14px auto minmax(0,1fr) 42px}
.fn math-field{font-size:1.15rem;min-height:46px;padding:4px 8px;border:2px solid var(--navy);border-radius:10px}
.fn .err{grid-column:3/5}
@media(min-width:800px){.gmain{grid-template-rows:none;grid-template-columns:340px minmax(0,1fr)}.gside{max-height:none;border-right:2px solid var(--navy)}}
.tg2{display:grid;gap:14px;margin-top:24px;grid-template-columns:minmax(0,1fr)}
@media(min-width:780px){.tg2{grid-template-columns:repeat(2,minmax(0,1fr))}}
.tb{position:relative;display:flex;flex-direction:column;justify-content:flex-end;gap:6px;min-height:260px;padding:24px;border-radius:20px;text-decoration:none;overflow:hidden}
.tb-c{background:var(--orange)}
.tb-m{margin-bottom:auto;font-size:1.7rem}
.tb-m .katex-display{margin:0;text-align:left}.tb-m .katex-display>.katex{text-align:left}
.tb-n{position:relative;font-size:1.65rem;line-height:1.15}
.tb-d{font-size:1.05rem}
.tb-g{background:var(--navy);color:var(--ivory)}
.tb-g .tg-plot{position:absolute;inset:0;width:100%;height:100%}
a.tb:hover .tb-n{text-decoration:underline;text-underline-offset:4px}

/* v13 experience */
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{font-size:1.09rem;line-height:1.55}
.site{position:sticky;top:0;z-index:20;background:var(--ivory);border-bottom:2px solid var(--navy)}
.bar{display:flex;align-items:center;gap:18px;min-height:74px}
.site .logo{width:54px;flex:none;color:var(--navy)}
.dnav{display:none;align-items:center;gap:2px;margin-right:auto}
.dnav>a,.dd>summary{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 11px;border-radius:10px;text-decoration:none;font-size:1rem;cursor:pointer}
.dnav>a:hover,.dnav .dd>summary:hover,.dnav .dd[open]>summary{background:rgba(241,139,21,.28);text-decoration:none}
.dnav>a[aria-current]{background:var(--orange)}
.bar-r{display:flex;align-items:center;gap:8px;margin-left:auto}
.cta-s{min-height:44px;padding:8px 16px;font-size:.98rem;border-radius:11px;white-space:nowrap}
.lang-dd>summary{margin:0;border:2px solid var(--navy);min-height:42px}
.menu{background:#fff;box-shadow:none;border:2px solid var(--navy);border-radius:14px;top:calc(100% + 10px)}
.mega{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px;width:560px;padding:10px}
.mi{gap:12px}
.mi img{width:26px;height:26px;object-fit:contain;flex:none}
.mall{grid-column:1/-1;justify-content:center;margin-top:6px;border-top:1.5px solid rgba(13,29,44,.2);border-radius:0;text-decoration:underline!important}
.mtools{width:340px;padding:8px}
.menu a.mt{display:block;padding:10px 12px}
.mt b{display:block;font-weight:400;font-size:1.05rem}
.mt small{display:block;color:var(--soft);font-size:.92rem;line-height:1.3;margin-top:2px}
.menu a:hover{background:rgba(241,139,21,.32)}
.mnav>summary{width:44px;height:44px;padding:0;justify-content:center;border:2px solid var(--navy);border-radius:11px}
.mnav>summary::after{display:none}
.bars,.bars::before,.bars::after{display:block;width:20px;height:2.4px;background:var(--navy);border-radius:2px;transition:transform .15s}
.bars{position:relative}
.bars::before,.bars::after{content:"";position:absolute;left:0}
.bars::before{top:-6.5px}.bars::after{top:6.5px}
.mnav[open] .bars{background:transparent}
.mnav[open] .bars::before{transform:translateY(6.5px) rotate(45deg)}
.mnav[open] .bars::after{transform:translateY(-6.5px) rotate(-45deg)}
.mpanel{position:fixed;left:0;right:0;top:76px;bottom:0;overflow:auto;padding:18px 16px 28px;background:var(--ivory)}
.mh{margin:18px 0 6px;font-size:.95rem;color:var(--soft)}
.mh:first-child{margin-top:0}
.mgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
.mgrid a{display:flex;align-items:center;min-height:50px;padding:6px 12px;background:#fff;border:1.5px solid var(--navy);border-radius:11px;font-size:.98rem;line-height:1.2;text-decoration:none}
.mcta{width:100%;margin-top:20px}
@media(max-width:1039px){.cta-s{display:none}.lang-dd>summary{padding:0 8px}}
@media(max-width:560px){.site .logo{width:48px}.bar{min-height:66px}.mpanel{top:68px}}
@media(min-width:1040px){.dnav{display:flex}.mnav{display:none}.bar-r{margin-left:0}}
.hero{background:var(--orange);overflow:hidden}
.hero-grid{padding-block:44px 0}
.hero-a{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px}
.ghost{display:inline-flex;align-items:center;min-height:54px;padding:8px 6px;font-size:1.06rem;text-underline-offset:4px}
.note{margin:14px 0 40px}
.hero-art{animation:rise .6s cubic-bezier(.2,.9,.3,1) both}
@keyframes rise{from{transform:translateY(26px);opacity:0}to{transform:none;opacity:1}}
.cta{transition:transform .12s,background-color .12s}
.cta:hover{transform:translateY(-1px)}
.sec{padding-block:clamp(52px,7vw,84px)}
.sub{margin:8px 0 28px}
.h2svg{display:block;height:clamp(36px,5.6vw,56px)}
.gts{margin-top:8px}
.gt{transition:transform .12s;min-height:160px}
.gt:hover{transform:translateY(-3px)}
.g3{grid-template-columns:minmax(0,1fr)}
@media(min-width:780px){.g3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.steps{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:18px;grid-template-columns:minmax(0,1fr)}
.steps li{position:relative;padding:24px;background:#fff;border:2px solid var(--navy);border-radius:20px}
.st-n{position:absolute;top:18px;right:18px;display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--orange);font-family:var(--math);font-size:1.3rem}
.steps img{width:120px;height:120px;object-fit:contain;object-position:left bottom;margin-bottom:14px}
.steps h3{margin:0 0 4px;font-size:1.32rem;font-weight:400;line-height:1.2}
.steps p{margin:0;color:var(--soft)}
@media(min-width:820px){.steps{grid-template-columns:repeat(3,minmax(0,1fr))}}
.center{display:flex;justify-content:center;margin-top:30px}
.fs4{display:grid;gap:30px;margin-top:30px;grid-template-columns:minmax(0,1fr)}
@media(min-width:620px){.fs4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:980px){.fs4{grid-template-columns:repeat(4,minmax(0,1fr))}}
.f img{width:40px;height:40px;object-fit:contain;object-position:left;margin-bottom:12px}
.f h3{margin:0 0 4px;font-size:1.25rem;font-weight:400;line-height:1.2}
.f p{margin:0;color:var(--soft);font-size:1.02rem}
.dark{background:var(--navy);color:var(--ivory)}
.dark .links a{color:var(--ivory)}
.dark .teach{margin-top:28px}
.tc1{padding:24px;border:2px solid rgba(239,239,228,.45);border-radius:20px}
.tc1 p{margin:6px 0 0}
.tc-o{background:var(--orange);border-color:var(--orange);color:var(--navy)}
.tagx{font-size:1.05rem}
.tb{transition:transform .12s}
.tb:hover{transform:translateY(-3px)}
.pcs{display:grid;gap:14px;margin-top:26px;grid-template-columns:minmax(0,1fr)}
@media(min-width:720px){.pcs{grid-template-columns:repeat(3,minmax(0,1fr))}}
.pc{display:flex;flex-direction:column;gap:4px;padding:24px;background:#fff;border:2px solid var(--navy);border-radius:20px;text-decoration:none;transition:transform .12s}
.pc:hover{transform:translateY(-3px)}
.pc strong{font-weight:400;font-size:clamp(2rem,4vw,2.7rem);line-height:1.05}
.pc-n{font-size:1.1rem}
.pc-o{background:var(--orange)}
.pc-o .det{color:var(--navy)}
.fbox{display:grid;gap:26px;align-items:center}
.fbox>img{width:min(100%,240px);height:auto;border-radius:24px;border:2px solid var(--navy)}
.fbox .big{margin-top:12px}
@media(min-width:720px){.fbox{grid-template-columns:240px minmax(0,1fr);gap:44px}}
/* pricing and programs */
.prs{display:grid;gap:14px;border:0;grid-template-columns:minmax(0,1fr)}
.pr{flex-direction:column;align-items:flex-start;justify-content:space-between;min-height:176px;padding:24px;background:#fff;border:2px solid var(--navy);border-radius:20px}
.pr strong{order:-1;margin-bottom:12px;font-size:clamp(2.2rem,4vw,2.9rem)}
@media(min-width:680px){.prs{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:980px){.prs:not(.mt){grid-template-columns:repeat(6,minmax(0,1fr))}.prs:not(.mt) .pr{grid-column:span 2}.prs:not(.mt) .pr:nth-child(-n+2){grid-column:span 3}}
.prs:not(.mt) .pr:first-child{background:var(--orange)}
.prs:not(.mt) .pr:first-child p{color:var(--navy)}
.weeks{border:0;position:relative;padding-left:28px}
.weeks::before{content:"";position:absolute;left:8px;top:18px;bottom:18px;width:2px;background:var(--navy)}
.weeks li{position:relative;padding:14px 4px 14px 8px;border:0}
.weeks li::before{content:"";position:absolute;left:-26px;top:21px;width:14px;height:14px;background:var(--orange);border:2px solid var(--navy);border-radius:50%}
.ticks{max-width:none;grid-template-columns:minmax(0,1fr);column-gap:40px}
@media(min-width:760px){.ticks{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* faq */
.fqs{border-top:2px solid var(--navy)}
.fq summary{position:relative;display:block;padding:18px 40px 18px 2px;list-style:none;font-size:1.14rem;line-height:1.3}
.fq summary::-webkit-details-marker{display:none}
.fq summary::after{content:"";position:absolute;right:8px;top:24px;width:10px;height:10px;border-right:2.4px solid var(--navy);border-bottom:2.4px solid var(--navy);transform:rotate(45deg);transition:transform .15s}
.fq[open] summary::after{transform:translateY(5px) rotate(225deg)}
.fq p{padding:0 40px 8px 2px}
/* footer */
footer{padding-block:54px 28px;font-size:1rem}
.fgrid{display:grid;gap:32px 24px;grid-template-columns:repeat(2,minmax(0,1fr))}
@media(min-width:900px){.fgrid{grid-template-columns:1.2fr 1fr 1fr 1.1fr}}
.fc h2{margin:0 0 10px;font-size:1.05rem;font-weight:400;color:var(--orange)}
.fc a{display:block;padding:4px 0;text-decoration:none;line-height:1.3;overflow-wrap:anywhere}
.fc a:hover{text-decoration:underline;text-underline-offset:3px}
footer .row{display:block;margin-top:36px;padding-top:20px;border-top:1px solid rgba(239,239,228,.28)}
footer .row>*{padding-top:0}
.tm{margin:8px 0 0}
.close{padding-block:clamp(56px,7vw,88px)}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.hero-art{animation:none}*{transition:none!important}}
.gapp .logo{color:var(--navy)}

.gts{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.g3,.two-b .gts{grid-template-columns:minmax(0,1fr)}
@media(min-width:780px){.g3{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(min-width:980px){.gts:not(.g3){grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.two-b .gts{grid-template-columns:minmax(0,1fr)}}
@media(max-width:560px){.gt{min-height:136px;padding:14px;gap:14px;border-radius:14px}.gt-m{min-height:48px;font-size:.82rem}.gt-m.expr{font-size:1.18rem}.gt-n{font-size:1.02rem}.g3 .gt-m,.two-b .gt-m{font-size:1.02rem}}
.mall{border-radius:0!important}
.steps img{height:110px}

.tb-g::after{content:"";position:absolute;left:0;right:0;bottom:0;height:45%;background:linear-gradient(transparent,var(--navy) 65%)}
.tb-g .tb-n{z-index:1}
.menu a.mt{margin:0}

/* v14 library */
.hero:has(.lib-h),.hero:has(.art-h){background:var(--paper);border-bottom:2px solid var(--navy)}
.hero:has(.lib-h) .hero-grid{padding-block:30px 26px}
.lib{padding-block:32px 72px}
.lib-g{display:grid;gap:22px;grid-template-columns:minmax(0,1fr);align-items:start}
.lib-s input{min-height:48px;margin-bottom:12px;padding-left:40px;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230D1D2C' stroke-width='2.2'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-4-4'/%3E%3C/svg%3E") 12px center/18px no-repeat}
.lib-s nav{display:flex;gap:6px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin}
.lib-s nav a{display:flex;align-items:center;gap:9px;flex:none;min-height:44px;padding:6px 12px;background:#fff;border:1.5px solid var(--navy);border-radius:11px;text-decoration:none;font-size:.98rem;line-height:1.2}
.lib-s nav img{width:22px;height:22px;object-fit:contain}
@media(min-width:900px){.lib-g{grid-template-columns:270px minmax(0,1fr);gap:40px}.lib-s{position:sticky;top:96px}.lib-s nav{display:grid;gap:2px;overflow:visible}.lib-s nav a{background:none;border:0}.lib-s nav a:hover{background:rgba(241,139,21,.28)}}
.course{margin-bottom:28px;scroll-margin-top:96px;background:#fff;border:2px solid var(--navy);border-radius:18px;overflow:hidden}
.course[hidden],.lesson[hidden]{display:none}
.course>header{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--navy);color:var(--ivory)}
.course>header img{width:34px;height:34px;padding:4px;background:var(--ivory);border-radius:9px;object-fit:contain}
.course h2{margin:0;font-size:1.28rem;font-weight:400;line-height:1.2}
.course header a{margin-left:auto;font-size:.98rem;color:var(--ivory);white-space:nowrap}
.lesson{display:grid;grid-template-columns:24px minmax(0,1fr);align-items:center;gap:6px 14px;padding:16px 18px;border-top:1.5px solid rgba(13,29,44,.16);text-decoration:none}
.lesson:first-child{border-top:0}
.lesson:hover{background:rgba(241,139,21,.14)}
.lesson:hover b{text-decoration:underline;text-underline-offset:3px}
.tick{display:block;width:22px;height:22px;border:2px solid var(--navy);border-radius:50%;flex:none}
.done .tick{background:var(--orange) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230D1D2C' stroke-width='3.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/15px no-repeat}
.l-m{display:none}
.l-t b{display:block;font-weight:400;font-size:1.14rem;line-height:1.25}
.l-t small{display:block;margin-top:2px;color:var(--soft);font-size:.98rem;line-height:1.35}
@media(min-width:760px){.lesson{grid-template-columns:24px minmax(0,1fr) 230px}.l-m{display:block;order:3;font-size:.86rem;overflow:hidden}.l-m .katex-display{margin:0;text-align:right}.l-m .katex-display>.katex{text-align:right}}
.art-h{padding-block:24px 22px;max-width:860px}
.art-h .lede{margin:10px 0 0}
.crumb{display:flex;gap:8px;font-size:.98rem}
.art-t{font-size:clamp(1.9rem,4.2vw,3rem)}
.jump{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}
.jump a{display:inline-flex;align-items:center;min-height:38px;padding:4px 12px;background:#fff;border:1.5px solid var(--navy);border-radius:999px;font-size:.96rem;text-decoration:none}
.jump a:hover{background:var(--orange)}
.art-g2{display:grid;gap:26px;grid-template-columns:minmax(0,1fr);align-items:start}
@media(min-width:960px){.art-g2{grid-template-columns:250px minmax(0,1fr);gap:52px}.art-o{position:sticky;top:96px}}
.art-o{padding:16px;background:var(--ivory);border-radius:16px}
.o-h{display:flex;align-items:center;gap:10px;margin:0 0 10px;font-size:1.1rem}
.o-h img{width:26px;height:26px;object-fit:contain}
.ol{display:flex;align-items:center;gap:10px;min-height:44px;padding:6px 8px;border-radius:9px;text-decoration:none;font-size:1rem;line-height:1.2}
.ol .tick{width:18px;height:18px}
.ol:hover{background:rgba(241,139,21,.28)}
.ol.cur{background:#fff;font-style:italic}
.o-more{margin-top:10px;padding-top:10px;border-top:1.5px solid rgba(13,29,44,.2);font-size:.98rem}
.o-more summary{cursor:pointer;min-height:32px}
.o-more a{display:block;padding:5px 0;text-decoration:none}
.o-more a:hover{text-decoration:underline}
.prose-a{max-width:760px}
.prose-a h2{scroll-margin-top:96px}
#mistake{scroll-margin-top:96px}
.done-b{display:inline-flex;align-items:center;justify-content:center;min-height:50px;margin-top:22px;padding:0 20px;font:inherit;color:var(--navy);background:#fff;border:2px solid var(--navy);border-radius:12px;cursor:pointer}
.done-b.on{background:var(--orange)}
.pns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:26px}
.pn{display:block;padding:14px 16px;background:#fff;border:2px solid var(--navy);border-radius:14px;text-decoration:none;line-height:1.25}
.pn:hover{background:rgba(241,139,21,.28)}
.pn small{display:block;color:var(--soft);font-size:.92rem}
.pn b{font-weight:400;font-size:1.04rem}
.pn-n{text-align:right}
.a-cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:26px;padding:22px;background:var(--orange);border-radius:18px}
.a-cta h2{margin:0;font-size:1.35rem}
.a-cta p{margin:4px 0 0}

/* v15 story */
.story{display:grid;gap:34px;grid-template-columns:minmax(0,1fr);align-items:start}
.st-c img{width:min(100%,360px);height:auto;border:2px solid var(--navy);border-radius:24px}
.st-n2{margin:16px 0 2px;font-size:1.45rem;line-height:1.2}
.st-r{margin:0;color:var(--soft);font-size:1rem;line-height:1.4}
.st-t{max-width:680px}
.st-t p{margin:18px 0 0;font-size:clamp(1.15rem,2vw,1.32rem);line-height:1.55}
@media(min-width:820px){.story{grid-template-columns:320px minmax(0,1fr);gap:64px}.st-c{position:sticky;top:96px}}
.q-s{background:var(--orange);padding-block:clamp(52px,7vw,84px)}
.q-s blockquote{margin:0;max-width:880px;font-size:clamp(1.8rem,4.2vw,3rem);line-height:1.15;letter-spacing:-.015em}
.bels{display:grid;gap:26px;margin-top:26px;grid-template-columns:minmax(0,1fr)}
@media(min-width:820px){.bels{grid-template-columns:repeat(3,minmax(0,1fr));gap:40px}}
.bel{padding-top:14px;border-top:2px solid var(--navy)}
.bel h3{margin:0 0 6px;font-size:1.34rem;font-weight:400;line-height:1.2}
.bel p{margin:0;color:var(--soft)}

.st-t p.st-turn{margin-top:30px;font-size:clamp(1.6rem,3vw,2.1rem);line-height:1.15;letter-spacing:-.01em;color:var(--navy)}
.st-t p.st-turn+p{margin-top:10px}

/* v16 pay */
.pr .pay{margin-top:18px;min-height:46px;padding:8px 20px;font-size:1rem;text-decoration:none}

/* v17 paths */
.doors{background:var(--navy);padding-block:18px}
.dgrid{display:grid;gap:10px;grid-template-columns:minmax(0,1fr)}
@media(min-width:760px){.dgrid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}}
.door{display:flex;flex-direction:column;gap:3px;padding:16px 18px;background:var(--ivory);color:var(--navy);border-radius:14px;text-decoration:none;border:2px solid var(--navy)}
.door:hover{background:var(--orange)}
.door b{font-weight:400;font-size:1.22rem;line-height:1.2}
.door span{font-size:1rem;line-height:1.35;color:var(--soft)}
.door:hover span{color:var(--navy)}
.door em{margin-top:6px;font-style:normal;font-size:1rem;text-decoration:underline;text-underline-offset:3px}
.door-l{justify-content:center;min-height:72px;background:#fff}
.stp{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:22px;grid-template-columns:minmax(0,1fr)}
@media(min-width:760px){.stp{grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}}
.stp h3,.tl h3,.wh h3{margin:0 0 4px;font-size:1.25rem;font-weight:400;line-height:1.25}
.stp p,.tl p,.wh p{margin:0;color:var(--soft)}
.stp .n,.tl .n{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;margin-bottom:10px;border-radius:50%;background:var(--orange);color:var(--navy);border:2px solid var(--navy);font-size:1rem;flex:none}
.whs{display:grid;gap:0;margin-top:22px;border-top:2px solid var(--navy);grid-template-columns:minmax(0,1fr)}
.wh{padding:16px 4px;border-bottom:1.5px solid rgba(13,29,44,.28)}
@media(min-width:760px){.wh{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:24px;align-items:baseline}.w3 .wh{grid-template-columns:minmax(0,1fr) minmax(0,2fr)}}
.nf{border:0;gap:12px}
@media(min-width:680px){.nf{grid-template-columns:repeat(3,minmax(0,1fr))}}
.tl{list-style:none;margin:26px 0 0;padding:0;max-width:760px}
.tl li{display:flex;gap:18px;padding-bottom:26px;position:relative}
.tl li:not(:last-child):before{content:"";position:absolute;left:17px;top:38px;bottom:0;width:2px;background:var(--navy)}
.tl .n{margin:0;position:relative;z-index:1}
.two-h{display:grid;gap:40px;grid-template-columns:minmax(0,1fr)}
@media(min-width:820px){.two-h{grid-template-columns:repeat(2,minmax(0,1fr));gap:64px}}
.lib-x{display:flex;flex-direction:column;gap:6px;margin-top:14px;padding:12px 10px 0;border-top:1.5px solid rgba(13,29,44,.28);font-size:1rem}
.lib-x a{min-height:36px;display:flex;align-items:center}
.tryc{margin:26px 0 12px;color:var(--soft)}
.fnav{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:30px}
.fnav a{padding:7px 14px;border:2px solid var(--navy);border-radius:10px;text-decoration:none;font-size:1rem}
.fnav a:hover{background:var(--orange)}
.fsec{margin-top:22px;background:#fff;border:2px solid var(--navy);border-radius:18px;overflow:hidden;scroll-margin-top:16px}
.fsec header{display:flex;align-items:center;gap:12px;padding:12px 18px;background:var(--navy);color:var(--ivory)}
.fsec header img{background:var(--ivory);border-radius:8px;padding:3px}
.fsec header h2{margin:0;flex:1;font-size:1.25rem;font-weight:400}
.fsec header a{color:var(--ivory);font-size:1rem;text-underline-offset:3px}
.fgr{display:grid;grid-template-columns:minmax(0,1fr)}
@media(min-width:760px){.fgr{grid-template-columns:repeat(2,minmax(0,1fr))}}
.fm{padding:14px 18px;border-bottom:1.5px solid rgba(13,29,44,.16);min-width:0}
.fm small{display:block;color:var(--soft);font-size:.95rem;margin-bottom:4px}
.fm>div{overflow-x:auto;overflow-y:hidden;padding:2px 0}
.fm .katex-display{margin:0;text-align:left}
.fm .katex-display>.katex{text-align:left}
.mbar{display:none}
@media(max-width:679px){.mbar{display:block;position:fixed;left:0;right:0;bottom:0;z-index:40;padding:8px 16px calc(8px + env(safe-area-inset-bottom));background:var(--ivory);border-top:2px solid var(--navy);transition:transform .18s}.mbar .cta{display:flex;width:100%;min-height:48px;padding:6px 16px;font-size:1rem}.mbar.off{transform:translateY(110%)}body:has(.mbar) footer{padding-bottom:84px}}
@media print{.top,.hero .lede,.fnav,footer,.mbar,.no-p,.fsec header a{display:none!important}.fsec{break-inside:avoid}}

/* v18 calculators */
.ws>math-field{display:block;width:100%;min-height:76px;padding:14px 16px;font-size:1.7rem;background:#fff;border:0;border-radius:0}
.ws .ws-b{border-top:1.5px solid rgba(13,29,44,.2);border-bottom:1.5px solid rgba(13,29,44,.2)}
.kb-all{border-bottom:1.5px solid rgba(13,29,44,.2)}
.kb-all .kb-p{display:grid;grid-template-columns:repeat(auto-fill,minmax(54px,1fr));gap:6px}
.kb-all .kk{min-width:0;width:100%}
.ws-act{display:flex;flex-wrap:wrap;gap:6px;padding:10px;background:var(--navy)}
.ws-act .chip{background:var(--ivory);border-color:var(--ivory);min-height:40px;padding:4px 13px}
.ws-act .chip:hover{background:var(--orange);border-color:var(--orange)}
#res{margin-top:16px}
.res-h{margin:0 0 4px;color:var(--soft);font-size:1rem}
#steps{margin-top:12px}
.stp-d{background:#fff;border:2px solid var(--navy);border-radius:14px;padding:14px 18px}
.stp-d summary{cursor:pointer;font-size:1.2rem;min-height:30px}
.nost{margin:8px 0 2px;color:var(--soft)}
.stp-l{margin:12px 0 0;padding:0;list-style:none;counter-reset:s}
.stp-l>li{counter-increment:s;position:relative;padding:0 0 14px 40px;margin-left:calc(var(--d,0)*14px)}
.stp-l>li:before{content:counter(s);position:absolute;left:0;top:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--orange);color:var(--navy);border:2px solid var(--navy);font-size:.92rem}
.stp-l>li.sub:before{background:#fff}
.stp-l>li:last-child{padding-bottom:2px}
.stp-l p{margin:0;line-height:1.45;padding-top:2px}
.stp-m{overflow-x:auto;overflow-y:hidden;padding:2px 0}
.stp-m .katex-display{margin:6px 0;text-align:left}
.stp-m .katex-display>.katex{text-align:left}
.plotw{margin-top:12px;border:2px solid var(--navy);border-radius:14px;overflow:hidden;background:#fff}
.plotw .cvw{position:relative;border:0;border-radius:0;height:320px}
.plotw canvas{display:block;width:100%;height:100%}
.plotf{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 16px;align-items:center;padding:10px 14px;border-top:1.5px solid rgba(13,29,44,.2)}
.plgs{display:flex;flex-wrap:wrap;gap:6px 14px;min-width:0}
.plg{display:inline-flex;align-items:center;gap:6px;max-width:100%;overflow:hidden}
.plg i{flex:none;width:12px;height:12px;border-radius:50%}
.plotf a{text-underline-offset:3px}
.gapp .gside{overflow-y:auto;min-height:0}
.gks{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:4px;margin-bottom:12px}
.gk{min-width:0;width:100%;height:38px;padding:0 2px;font-size:.88rem}
.fn{grid-template-columns:18px minmax(0,1fr) 38px;gap:8px;margin-bottom:12px}
.fn .sw{width:18px;height:18px;padding:0;border:2px solid var(--navy);border-radius:50%;cursor:pointer}
.fn .sw.off{background:#fff!important}
.fn .x{width:38px;height:38px}
.fn .err{grid-column:2/4}
.fn-t{grid-column:2/4;display:flex;flex-wrap:wrap;gap:4px 12px;align-items:center;font-size:.95rem}
.fn-k{color:var(--soft)}
.lnk{font:inherit;background:none;border:0;padding:2px 0;color:var(--navy);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.fn-r{display:flex;gap:8px;flex-basis:100%}
.fn-r label{display:flex;align-items:center;gap:4px}
.fn-r input,.sld input[type=number],.gset input[type=number],.tb-c input{width:70px;font:inherit;font-size:.95rem;padding:3px 6px;border:1.5px solid var(--navy);border-radius:7px;background:#fff;color:var(--navy)}
.fn-p{grid-column:1/4;padding:10px 12px;background:#fff;border:1.5px solid var(--navy);border-radius:10px;overflow-x:auto;font-size:.98rem}
.fn-p .stp-l>li{padding-left:34px}
.fn-p .stp-l>li:before{width:24px;height:24px;font-size:.82rem}
.tb-c{display:flex;gap:12px;margin-bottom:8px}
.tb-c label{display:flex;align-items:center;gap:5px}
.vt{border-collapse:collapse;width:100%}
.vt th,.vt td{padding:3px 8px;border-bottom:1px solid rgba(13,29,44,.2);text-align:left;font-variant-numeric:tabular-nums}
.sls:not(:empty){margin-top:12px;padding-top:10px;border-top:1.5px solid rgba(13,29,44,.28)}
.sld{display:grid;grid-template-columns:auto minmax(0,1fr) 66px 38px;gap:8px;align-items:center;margin-bottom:8px}
.sld .sn{font-family:var(--math);white-space:nowrap}
.sld input[type=number]{width:100%}
.sld .ic{min-height:36px;height:36px;width:38px;padding:0;font-size:.8rem}
.ghint{margin:12px 0;color:var(--soft);font-size:.95rem;line-height:1.35}
.gset{border-top:1.5px solid rgba(13,29,44,.28);padding-top:8px}
.gset summary{cursor:pointer;min-height:32px}
.gset fieldset{border:0;padding:0;margin:6px 0;display:grid;grid-template-columns:1fr 1fr;gap:6px 10px}
.gset legend{padding:0;margin-bottom:4px;color:var(--soft)}
.gset fieldset label{display:flex;align-items:center;justify-content:space-between;gap:4px;font-size:.95rem}
.gset .ck{display:inline-flex;align-items:center;gap:6px;margin-right:12px}
.gset-a{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}

@media(max-width:819px){.gapp .gside{max-height:46dvh}}

/* v19 graph polish */
.gapp{background:#fff}
.gapp .gbar{padding:6px 16px;min-height:52px;background:var(--ivory);border-bottom:2px solid var(--navy);gap:12px}
.gapp .gbar .logo{width:40px}
.gapp .gbar h1{font-size:1.1rem}
.gapp .gbk{margin-left:auto;padding:6px 12px;font-size:.95rem;border:1.5px solid var(--navy);border-radius:9px;text-decoration:none;white-space:nowrap}
.gapp .gbk:hover{background:var(--orange)}
.gapp .gside{padding:0;background:#fff;scrollbar-width:thin;display:flex;flex-direction:column}
@media(min-width:800px){.gapp .gmain{grid-template-columns:360px minmax(0,1fr)}.gapp .gside{border-right:1.5px solid rgba(13,29,44,.22);box-shadow:2px 0 10px rgba(13,29,44,.05);z-index:1}}
@media(max-width:799px){.gapp .gside{border-bottom:1.5px solid rgba(13,29,44,.22)}}
.gks{position:sticky;top:0;z-index:3;margin:0;padding:8px 10px;gap:3px;background:var(--ivory);border-bottom:1.5px solid rgba(13,29,44,.16)}
.gk{height:34px;background:transparent;border:0;border-radius:7px;font-size:.84rem}
.gk:hover{background:#fff;box-shadow:inset 0 0 0 1px rgba(13,29,44,.25)}
.fn{position:relative;grid-template-columns:22px minmax(0,1fr) 30px;gap:4px 6px;margin:0;padding:8px 8px 8px 10px;border-bottom:1px solid rgba(13,29,44,.12);border-left:3px solid transparent}
.fn.on{background:#FBFAF4;border-left-color:var(--orange)}
.fn .sw{width:16px;height:16px;margin:0 auto;border:0;box-shadow:0 0 0 2px #fff,0 0 0 3px rgba(13,29,44,.14)}
.fn .sw.off{box-shadow:inset 0 0 0 2px rgba(13,29,44,.35)}
.fn math-field{min-height:40px;padding:2px 6px;font-size:1.12rem;background:transparent;border:0;border-radius:7px;outline:none;--selection-background-color:#FBD9AE}
.fn math-field:focus-within{background:#fff;box-shadow:inset 0 0 0 1.5px var(--navy)}
.fn .x{width:30px;height:30px;font-size:1.1rem;line-height:1;color:var(--soft);border:0;border-radius:7px;background:transparent;opacity:.55}
.fn:hover .x,.fn.on .x{opacity:1}
.fn .x:hover{background:rgba(13,29,44,.08);color:var(--navy)}
.fn-t{gap:2px 12px;font-size:.86rem;padding-left:6px}
.fn-k{padding:1px 7px;background:rgba(13,29,44,.06);border-radius:20px;color:var(--navy)}
.lnk{font-size:.86rem;color:var(--soft)}
.lnk:hover{color:var(--navy)}
.fn-r{padding-top:4px;font-size:.86rem;color:var(--soft)}
.fn-r input,.sld input[type=number],.gset input[type=number],.tb-c input{border:1px solid rgba(13,29,44,.3);border-radius:6px;font-size:.88rem;padding:2px 6px}
.fn-p{margin-top:6px;border:1px solid rgba(13,29,44,.16);background:#fff;font-size:.94rem}
.fn-p .stp-l>li:before{background:#fff;border-width:1.5px}
.vt th{font-weight:400;color:var(--soft)}
#add{align-self:flex-start;margin:10px;min-height:36px;padding:4px 12px;font-size:.95rem;border:1px dashed rgba(13,29,44,.45);border-radius:8px}
#add:hover{background:var(--ivory)}
.sls:not(:empty){margin:0;padding:10px;border-top:1px solid rgba(13,29,44,.12)}
.sld{grid-template-columns:auto minmax(0,1fr) 58px 30px;gap:6px}
.sld input[type=range]{accent-color:var(--orange);min-width:0}
.sld .ic{width:30px;height:30px;min-height:30px;border:0;background:rgba(13,29,44,.07);border-radius:7px;font-size:.7rem}
.gexw{padding:6px 12px 10px;margin-top:auto}
.gexw p{margin:0 0 5px;color:var(--soft);font-size:.86rem}
.gexs{display:flex;flex-wrap:wrap;gap:4px}
.gex{padding:3px 8px;background:#fff;color:var(--navy);border:1px solid rgba(13,29,44,.22);border-radius:7px;font-size:.82rem;cursor:pointer}
.gex:hover{background:var(--ivory);border-color:var(--navy)}
.gset{padding:8px 12px;border-top:1px solid rgba(13,29,44,.12);font-size:.93rem}
.gset summary{color:var(--soft)}
.gset .btn2{min-height:34px;padding:2px 10px;font-size:.9rem;border-width:1px;border-radius:7px}
.gset input[type=checkbox]{accent-color:var(--orange)}
.gapp .cvw{background:#fff}
.gapp .gb{gap:0;top:12px;right:12px;flex-direction:column;background:#fff;border-radius:10px;box-shadow:0 1px 2px rgba(13,29,44,.2),0 4px 14px rgba(13,29,44,.12);overflow:hidden}
.gapp .gb .btn2{width:38px;min-width:38px;height:38px;min-height:38px;padding:0;display:flex;align-items:center;justify-content:center;background:#fff;border:0;border-radius:0;border-bottom:1px solid rgba(13,29,44,.1);font-size:1.25rem}
.gapp .gb .btn2:last-child{border-bottom:0}
.gapp .gb .btn2:hover{background:var(--ivory)}
.gset fieldset input[type=number]{width:72px;height:30px;min-height:0;flex:none}
.gset .ck{font-size:.92rem;min-height:30px;white-space:nowrap}
.gset input[type=checkbox]{width:16px;height:16px;min-height:0;min-width:0;margin:0;flex:none;padding:0}
.gset-b{padding-bottom:6px}
@media(max-width:799px){.gexw{display:none}}

/* v20 doors */
.doors{padding-block:0}
.dgrid{gap:0}
.door{flex-direction:row;align-items:center;gap:16px;padding:22px 20px;background:transparent;color:var(--ivory);border:0;border-radius:0;border-top:1px solid rgba(239,239,228,.18);transition:background .15s}
.dgrid .door:first-child{border-top:0}
.door:hover{background:rgba(239,239,228,.07)}
.d-i{flex:none;display:flex;align-items:center;justify-content:center;width:50px;height:50px;background:var(--orange);color:var(--navy);border-radius:14px}
.d-t{display:flex;flex-direction:column;gap:2px;min-width:0;flex:1}
.door .d-t b{font-size:1.2rem;line-height:1.2}
.door .d-t span,.door:hover .d-t span{color:rgba(239,239,228,.74);font-size:.98rem;line-height:1.3}
.d-a{flex:none;color:var(--orange);transition:transform .15s}
.door:hover .d-a{transform:translateX(4px)}
@media(min-width:900px){.dgrid{grid-template-columns:repeat(3,minmax(0,1fr))}.door{border-top:0;border-left:1px solid rgba(239,239,228,.18);padding:26px 24px}.dgrid .door:first-child{border-left:0;padding-left:0}.dgrid .door:last-child{padding-right:0}}
@media(min-width:760px) and (max-width:899px){.dgrid{grid-template-columns:minmax(0,1fr)}}
.door-l{flex-direction:column;background:#fff;color:var(--navy);border:2px solid var(--navy);border-radius:14px}
.door-l:hover{background:var(--orange)}
.door .d-t b{display:block;color:var(--ivory);font-weight:400}
.door .d-t b,.door:hover .d-t b{color:#F4F4EC}

/* v21 learn */
.l-n,.u-n{flex:none;display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--orange);color:var(--navy);border:2px solid var(--navy);font-size:.95rem}
.course header .u-n{border-color:var(--ivory)}
.lhead{padding:12px 18px;display:flex;flex-wrap:wrap;gap:6px 20px;align-items:center;justify-content:space-between;border-bottom:1.5px solid rgba(13,29,44,.16);color:var(--soft)}
.lhead p{margin:0;flex:1 1 220px;font-size:1rem}
.lprog{display:flex;align-items:center;gap:10px;min-width:160px;font-size:.92rem;color:var(--soft)}
.lprog b{flex:1;display:block;height:8px;background:rgba(13,29,44,.12);border-radius:8px;overflow:hidden}
.lprog i{display:block;height:100%;width:0;background:var(--orange);transition:width .25s}
.lesson.done .tick,.ol.done .tick{background:var(--orange) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230D1D2C' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/70% no-repeat}
.l-chk{background:rgba(241,139,21,.08)}
.lib-s .lprog{margin:8px 0 12px}
.lib-x b{font-weight:400;color:var(--soft);font-size:.92rem}
.lo-u{margin-bottom:6px}
.lo-u summary{cursor:pointer;padding:6px 4px;font-size:1rem;line-height:1.3}
.ol-c{font-style:italic}
.prac{background:#fff;border:2px solid var(--navy);border-radius:18px;padding:20px;margin-top:14px;scroll-margin-top:14px}
.pr-h{display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:space-between;align-items:center;margin-bottom:14px}
.pr-c{color:var(--soft);font-size:.95rem}
.pr-d{display:flex;gap:6px}
.pr-d i{width:22px;height:7px;border-radius:7px;background:rgba(13,29,44,.14)}
.pr-d i.now{background:var(--navy)}
.pr-d i.ok{background:#2E8B57}
.pr-d i.no{background:#D9A0A6}
.pr-q{font-size:1.2rem;line-height:1.4;margin-bottom:14px}
.pmc{display:grid;gap:8px}
.popt{display:flex;align-items:center;gap:12px;width:100%;min-height:52px;padding:8px 12px;font:inherit;text-align:left;color:var(--navy);background:#fff;border:2px solid rgba(13,29,44,.28);border-radius:12px;cursor:pointer}
.popt:hover{border-color:var(--navy);background:var(--ivory)}
.pk{flex:none;display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:rgba(13,29,44,.08);font-size:.9rem}
.popt.sel{border-color:var(--navy);background:#FDF0DF}
.popt.sel .pk{background:var(--orange)}
.popt.right{border-color:#2E8B57;background:#E8F5EC}
.popt.wrong{border-color:#C8324B;background:#FBEBED}
.pin math-field{display:block;width:100%;max-width:440px;min-height:54px;padding:8px 12px;font-size:1.4rem;border:2px solid var(--navy);border-radius:12px;background:#fff}
.pkeys{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px}
.pkey{min-width:44px;height:38px;padding:0 8px;background:#fff;border:1px solid rgba(13,29,44,.3);border-radius:8px;color:var(--navy);cursor:pointer}
.pkey:hover{background:var(--ivory)}
.pord{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.pit{display:flex;align-items:center;gap:8px;min-height:50px;padding:6px 8px;background:#fff;border:2px solid rgba(13,29,44,.28);border-radius:12px}
.pit.drag{position:relative;z-index:5;box-shadow:0 8px 20px rgba(13,29,44,.2);border-color:var(--navy)}
.pgr{flex:none;display:flex;align-items:center;justify-content:center;width:30px;height:38px;cursor:grab;touch-action:none;color:var(--soft)}
.pgr svg{fill:currentColor}
.pct{flex:1;min-width:0}
.pmv{flex:none;width:34px;height:34px;font:inherit;background:rgba(13,29,44,.06);border:0;border-radius:8px;color:var(--navy);cursor:pointer}
.pmv:disabled{opacity:.3;cursor:default}
.pmt{display:grid;gap:8px}
.pmr{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:10px;align-items:center}
.pml{min-width:0}
.pslot{min-height:50px;padding:4px;border:2px dashed rgba(13,29,44,.35);border-radius:12px;display:flex;align-items:center;background:#FBFAF4}
.pslot.full{border-style:solid;background:#fff}
.pbank{display:flex;flex-wrap:wrap;gap:8px;min-height:56px;margin-top:12px;padding:8px;background:var(--ivory);border-radius:12px}
.ptok{font:inherit;min-height:40px;padding:4px 12px;background:#fff;color:var(--navy);border:2px solid var(--navy);border-radius:10px;cursor:grab;touch-action:none;max-width:100%}
.pslot .ptok{width:100%;text-align:left}
.ptok.sel{background:var(--orange)}
.ptok.drag{position:relative;z-index:10;box-shadow:0 8px 20px rgba(13,29,44,.25)}
.pgw{max-width:620px}
.pgsvg{display:block;width:100%;height:auto;cursor:pointer;background:#fff;border-radius:10px;font-family:inherit}
.pgpt{max-width:360px;border:1px solid rgba(13,29,44,.18)}
.pcoord{margin:6px 0 0;color:var(--soft)}
.pr-f:empty{display:none}
.pr-f{margin-top:14px;padding:12px 14px;border-radius:12px}
.pr-f p{margin:0}
.pr-f.bad{background:#FBEBED}
.pr-f.warn{background:#FDF0DF}
.pr-f.good{background:#E8F5EC}
.pr-f.shown{background:var(--ivory)}
.pr-hint{margin-top:4px!important;color:var(--soft)}
.pr-v{font-size:1.1rem;margin-bottom:4px!important}
.pr-ans{margin-bottom:6px}
.pr-ans ol,.pr-ans ul{margin:0;padding-left:20px}
.pr-a{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px}
.pgo{border:0;font:inherit;min-height:48px;padding:6px 24px;cursor:pointer;text-decoration:none;text-align:center}
.pr-end{text-align:center;padding:18px 0}
.pr-end .pr-a{justify-content:center}
.pr-sc{margin:0 0 4px;font-size:2.6rem;line-height:1.1}
.pr-end p{margin:0}

/* v22 calculator */
math-field::part(virtual-keyboard-toggle),math-field::part(menu-toggle){display:none}
.ws-f{background:#fff}
.ws>.ws-f math-field,.ws-f math-field{display:block;width:100%;min-height:82px;padding:16px;font-size:1.65rem;background:#fff;border:0;outline:none}
.ws-tb{display:flex;align-items:center;gap:6px;padding:8px 10px;background:#fff;border-top:1.5px solid rgba(13,29,44,.16);border-bottom:1.5px solid rgba(13,29,44,.16)}
.kt{min-width:42px;width:42px;height:44px;padding:0;display:flex;align-items:center;justify-content:center;border:1px solid rgba(13,29,44,.25);border-radius:10px;background:#fff}
.ws-tb .ws-c{margin-left:auto;min-height:44px;padding:0 14px;border:0;background:none;color:var(--soft);text-decoration:underline;text-underline-offset:3px}
.ws-tb .cta{border:0;font:inherit;min-height:46px;padding:0 26px;cursor:pointer}
.kb-all{padding:8px 10px;background:var(--ivory)}
.kk-d{display:none}
.kb-all .kk{height:44px;background:#fff;border:1px solid rgba(13,29,44,.25);border-radius:9px}
.kb-all .kk:hover{background:#FDF0DF;border-color:var(--navy)}
.ws-act[hidden]{display:none}
.ws-act{background:#fff;border-top:1.5px solid rgba(13,29,44,.16);padding:8px 10px}
.ws-act .chip{background:#fff;border:1.5px solid var(--navy);min-height:38px;font-size:.95rem}
.ws-act .chip[hidden]{display:none}
.ws-act .chip:hover{background:var(--orange);border-color:var(--navy)}
@media(max-width:799px){.tool{padding-block:0 28px}.tool .wrap{padding-inline:0}.tool .ws{border-left:0;border-right:0;border-radius:0;border-top:0}.tool .result,.tool #steps,.tool .plotw,.tool #histw,.tool .exl,.tool .chips,.tool .sub{margin-inline:16px}
.ws{position:relative}
.ws-f{position:sticky;top:0}
.kb-all .kb-p{display:grid;grid-auto-flow:column;grid-template-rows:repeat(3,44px);grid-auto-columns:54px;grid-template-columns:none;gap:6px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;scroll-snap-type:x proximity;padding-right:30px}
.kb-all .kb-p::-webkit-scrollbar{display:none}
.kb-all{position:relative;padding-inline:10px 0}
.kb-all:after{content:"";position:absolute;right:0;top:0;bottom:0;width:30px;background:linear-gradient(90deg,rgba(239,239,228,0),var(--ivory));pointer-events:none}
.kk-d{display:block}
.ws-act{display:flex;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
.ws-act::-webkit-scrollbar{display:none}
.ws-act .chip{flex:none;white-space:nowrap}
.hero .hero-text .lede{font-size:1.05rem}
body:has(.tool) .hero-text{padding-block:14px 16px}
body:has(.tool) .hero-text .lede{display:none}
body:has(.tool) .h1svg{max-width:78%}
#res{margin-top:14px}}
/* v22 menu */
.mpanel.m2{top:68px;padding:0 0 92px;background:var(--ivory)}
.mmain{padding:6px 16px 4px}
.mrow{display:flex;align-items:center;justify-content:space-between;min-height:58px;font-size:1.42rem;line-height:1.15;letter-spacing:-.01em;text-decoration:none;border-bottom:1px solid rgba(13,29,44,.16)}
.mrow .mchev{color:var(--orange);flex:none}
.mrow[aria-current]{color:#B35A00}
.m2 .mh{margin:20px 16px 6px;font-size:.9rem;letter-spacing:.02em;color:var(--soft)}
.msub{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 12px;padding:0 16px}
.msub a{display:flex;align-items:center;gap:9px;min-height:48px;font-size:1rem;line-height:1.15;text-decoration:none}
.msub img{flex:none}
.mfoot{margin:16px 16px 0;padding-top:14px;border-top:1px solid rgba(13,29,44,.16);display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px}
.mmore{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:.95rem}
.mmore a{min-height:34px;display:inline-flex;align-items:center;color:var(--soft)}
.mlang{display:inline-flex;padding:3px;background:rgba(13,29,44,.08);border-radius:10px}
.mlang a{padding:6px 12px;border-radius:8px;font-size:.92rem;text-decoration:none}
.mlang a[aria-current]{background:#fff;box-shadow:0 1px 2px rgba(13,29,44,.2)}
.mbook{position:fixed;left:0;right:0;bottom:0;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--ivory);border-top:1.5px solid var(--navy)}
.mbook .cta{display:flex;width:100%;min-height:50px}
body:has(.mnav[open]){overflow:hidden}
body:has(.mnav[open]) .mbar{display:none}
@media(max-width:1039px){.lang-dd{display:none}}
@media(max-width:699px){.hero-grid{gap:12px}.hero .m-art,.hero-grid>img{max-height:210px;width:auto}.hero .note{display:none}}
/* v22 learn */
.ltiles{display:grid;gap:12px;grid-template-columns:minmax(0,1fr)}
@media(min-width:640px){.ltiles{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1040px){.ltiles{grid-template-columns:repeat(4,minmax(0,1fr))}}
.ltile{position:relative;display:flex;flex-direction:column;min-height:236px;padding:20px;border-radius:18px;text-decoration:none;overflow:hidden;transition:transform .15s}
.ltile:hover{transform:translateY(-3px)}
.lt-n{background:var(--navy);color:var(--ivory)}
.lt-o{background:var(--orange);color:var(--navy)}
.lt-m{font-size:1.2rem;min-height:66px}
.lt-m .katex-display{margin:0;text-align:left}
.lt-m .katex-display>.katex{text-align:left}
.lt-t{margin-top:auto;font-size:1.42rem;line-height:1.12;letter-spacing:-.01em}
.lt-u{margin-top:6px;font-size:.88rem;line-height:1.3;opacity:.78}
.ltile .lprog{margin-top:12px;color:inherit;min-width:0}
.lt-n .lprog b{background:rgba(239,239,228,.2)}
.lt-o .lprog b{background:rgba(13,29,44,.2)}
.lt-o .lprog i{background:var(--navy)}
.lmore{display:grid;gap:0 32px;grid-template-columns:minmax(0,1fr)}
@media(min-width:760px){.lmore{grid-template-columns:repeat(3,minmax(0,1fr))}}
.lmore a{display:block;padding:14px 0;border-top:2px solid var(--navy);text-decoration:none}
.lmore b{display:block;font-weight:400;font-size:1.25rem}
.lmore span{color:var(--soft)}
.pcourse{display:grid;gap:40px;grid-template-columns:minmax(0,1fr)}
@media(min-width:960px){.pcourse{grid-template-columns:minmax(0,1fr) 240px;gap:64px}}
.punit{margin-bottom:44px;scroll-margin-top:16px}
.pu-h{display:grid;grid-template-columns:auto minmax(0,1fr);gap:4px 16px;align-items:start}
.pu-n{font-size:clamp(2.8rem,6vw,4rem);line-height:.9;color:var(--orange);letter-spacing:-.03em;min-width:44px}
.pu-h h2{margin:0;font-size:clamp(1.5rem,3vw,2rem);font-weight:400;line-height:1.12;letter-spacing:-.01em}
.pu-h p{margin:4px 0 0;color:var(--soft)}
.pu-h .lprog{grid-column:2;max-width:320px;margin-top:6px}
.ppath{position:relative;margin:16px 0 0 20px;padding-left:0}
.ppath:before{content:"";position:absolute;left:12px;top:22px;bottom:30px;width:2px;background:rgba(13,29,44,.25)}
.pstop{position:relative;display:flex;gap:16px;align-items:flex-start;padding:12px 12px 12px 0;border-radius:10px;text-decoration:none}
.pstop:hover b{text-decoration:underline;text-underline-offset:3px}
.pstop .tick{position:relative;z-index:1;flex:none;width:26px;height:26px;margin-top:1px;background:var(--ivory);border:2px solid var(--navy);border-radius:50%}
.ps-t b{display:block;font-weight:400;font-size:1.16rem;line-height:1.25}
.ps-t small{display:block;margin-top:2px;font-size:.96rem;line-height:1.35;color:var(--soft)}
.ps-c .tick{border-radius:7px;transform:rotate(45deg)}
.ps-c.done .tick{transform:none;border-radius:50%}
.ps-c b{color:#A85400}
.pside h2{margin:18px 0 6px;font-size:.92rem;font-weight:400;color:var(--soft)}
.pside h2:first-child{margin-top:0}
.pside a{display:block;padding:7px 0;border-top:1px solid rgba(13,29,44,.16);text-decoration:none}
.pside a:hover{color:#A85400}
.art-b{max-width:760px;margin:6px 0 4px}
.art .ex{background:transparent;border:0;border-left:4px solid var(--orange);border-radius:0;padding:4px 0 4px 18px}
.art .ex h3{font-size:1.2rem}
.art .ex p{color:var(--navy)}
.art .ex.ex-w{display:flex;gap:16px;align-items:flex-start;padding:16px;margin:26px 0;background:#FDF0DF;border:0;border-radius:18px 18px 18px 4px}
.art .ex-w img{flex:none;width:72px;height:72px}
.art .ex-w h3{margin:0 0 4px;color:#A85400;font-size:1.05rem}
.art .ex-w .wr{text-decoration:line-through;text-decoration-color:#C8324B;text-decoration-thickness:1.5px;margin-bottom:6px}
.jump{display:none}
.m-o{display:none}
@media(max-width:899px){.art-o{display:none}.m-o{display:block;margin-bottom:18px;padding:10px 14px;background:var(--ivory);border-radius:12px}.m-o summary{cursor:pointer;font-size:.96rem;line-height:1.3}.m-o .lo{margin-top:8px}}
.prac{border:0;border-radius:0;background:var(--navy);color:var(--ivory);padding:0;border-radius:20px;overflow:hidden}
.pr-h{margin:0;padding:12px 18px}
.pr-c{color:rgba(239,239,228,.75)}
.pr-d i{background:rgba(239,239,228,.22)}
.pr-d i.now{background:var(--orange)}
.pr-d i.ok{background:#6BCB8B}
.pr-d i.no{background:#E58B97}
.pr-b,.pr-f,.pr-a{background:#fff;color:var(--navy)}
.pr-b{padding:18px 18px 4px}
.prac .pr-f{margin:0;border-radius:0;padding:12px 18px}
.prac .pr-f:empty{display:none}
.prac>.pr-a{margin:0;padding:14px 18px 18px}
.pr-m{width:120px;height:auto;margin:0 auto 8px;display:block}
.pin math-field{outline:none}
.pin math-field:focus-within{box-shadow:0 0 0 3px rgba(241,139,21,.35)}
.prose-a .a-cta{border-radius:18px}

.art-b svg{display:block;height:clamp(38px,6.5vw,60px);width:auto;max-width:100%}
.art-b{max-width:100%}
.lede .lp{display:none}

svg.art-b,h1.art-b svg,.art-b svg{display:block;height:clamp(38px,6.5vw,60px)!important;width:auto!important;max-width:100%}
h1.art-b{height:auto;margin:6px 0 4px}
.ws>.ws-f math-field,.ws-f math-field{min-height:68px}

.art .ex-w .wr{text-decoration:none;margin-bottom:6px}
.art .ex-w .wr:before{content:"\2715";margin-right:7px;color:#C8324B;font-size:.85em}

/* v23 menu */
.mpanel.m3{top:68px;padding:18px 20px 104px;background:var(--navy);color:var(--ivory);animation:mIn .18s ease-out}
@keyframes mIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.mpanel.m3{animation:none}}
.mmain3{display:grid;gap:2px}
.mbig{display:block;color:var(--ivory);text-decoration:none;padding:7px 0}
.mbig svg{display:block;height:38px;width:auto;max-width:100%;margin:0}
.mbig .ph,.mbig span{margin:0}
.mbig[aria-current]{color:var(--orange)}
.mbig:active{color:var(--orange)}
.msec{margin-top:22px}
.msec p{margin:0 0 9px;font-size:.88rem;color:rgba(239,239,228,.62)}
.mchips{display:flex;flex-wrap:wrap;gap:7px}
.mchips a{padding:8px 13px;font-size:.96rem;line-height:1.1;color:var(--ivory);text-decoration:none;border:1px solid rgba(239,239,228,.34);border-radius:30px}
.mchips a:active{background:var(--orange);border-color:var(--orange);color:var(--navy)}
.mlinks{display:flex;flex-wrap:wrap;gap:6px 18px}
.mlinks a{font-size:.98rem;color:var(--ivory);text-underline-offset:3px;min-height:30px;display:inline-flex;align-items:center}
.mbot{position:fixed;left:0;right:0;bottom:0;display:flex;gap:10px;align-items:center;padding:12px 20px calc(12px + env(safe-area-inset-bottom));background:var(--navy);border-top:1px solid rgba(239,239,228,.18)}
.mbot .cta{flex:1;min-height:50px;background:var(--orange);color:var(--navy)}
.mbot .mlang{flex:none;background:rgba(239,239,228,.12)}
.mbot .mlang a{color:var(--ivory);padding:8px 10px}
.mbot .mlang a[aria-current]{background:var(--ivory);color:var(--navy);box-shadow:none}

/* v24 book */
.tc{position:relative}
.tc-l{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:320px;padding:24px;text-align:center;color:var(--soft)}
.tc-l p{margin:0}
.tc-s{width:34px;height:34px;border:3px solid rgba(13,29,44,.15);border-top-color:var(--orange);border-radius:50%;animation:tcs .8s linear infinite}
@keyframes tcs{to{transform:rotate(360deg)}}
.tc-h{max-width:32em;color:var(--navy)}

/* v25 model unit */
.pr-lv{display:inline-block;margin-right:6px;padding:1px 9px;border-radius:20px;font-weight:400;color:var(--navy);background:var(--ivory)}
.pr-lv.l1{background:var(--orange)}
.pr-lv.l2{background:#F6C9A0;box-shadow:inset 0 0 0 2px var(--orange)}
.pr-q{white-space:normal}
.perr{display:grid;gap:6px}
.pel{display:flex;align-items:center;gap:12px;width:100%;min-height:50px;padding:6px 12px;font:inherit;text-align:left;color:var(--navy);background:#fff;border:2px solid rgba(13,29,44,.25);border-radius:12px;cursor:pointer}
.pen{flex:none;width:24px;color:var(--soft)}
.pel.sel{border-color:var(--navy);background:#FDF0DF}
.pel.right{border-color:#2E8B57;background:#E8F5EC}
.pel.wrong{border-color:#C8324B;background:#FBEBED}
.pcls{display:grid;gap:12px}
.pclr{display:grid;gap:6px}
.pseg{display:flex;flex-wrap:wrap;gap:5px}
.psg{flex:1 1 auto;min-height:40px;padding:4px 10px;font:inherit;font-size:.95rem;color:var(--navy);background:#fff;border:1.5px solid rgba(13,29,44,.3);border-radius:9px;cursor:pointer}
.psg.sel{background:var(--navy);color:var(--ivory);border-color:var(--navy)}
.psg.right{background:#E8F5EC;border-color:#2E8B57;color:var(--navy)}
.psg.wrong{background:#FBEBED;border-color:#C8324B;color:var(--navy)}
.pmp{margin-bottom:12px}
.pmp label{display:block;margin-bottom:5px}
.pmp math-field{display:block;width:100%;max-width:300px;min-height:50px;padding:6px 12px;font-size:1.3rem;border:2px solid var(--navy);border-radius:12px}
.pstars{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin:12px 0}
.pstars span{padding:3px 11px;border-radius:20px;font-size:.92rem;background:rgba(13,29,44,.08);color:var(--soft)}
.pstars span.on{background:var(--orange);color:var(--navy)}
.prv{margin-top:16px;text-align:left}
.prv h3{margin:0 0 8px;font-weight:400;font-size:1.2rem}
.prvi{padding:10px 12px;margin-bottom:6px;border-radius:10px;background:#E8F5EC}
.prvi.no{background:#FBEBED}
.prvi summary{cursor:pointer}
.prvi .pr-ans{margin:8px 0 4px;font-weight:400}
.lvls{flex:none;display:inline-flex;gap:3px;align-self:center;margin-left:auto}
.lvls i{width:9px;height:9px;border-radius:50%;background:rgba(13,29,44,.15)}
.lvls i.on{background:var(--orange)}
.pu-g{margin:12px 0 0 60px;padding:12px 16px;background:#fff;border-radius:12px}
.pu-g p{margin:0 0 4px;color:var(--soft);font-size:.95rem}
.pu-g ul{margin:0;padding-left:18px}
.pu-g li{margin:2px 0;font-size:1rem}
@media(max-width:560px){.pu-g{margin-left:0}}
.think{margin:22px 0;padding:18px;background:var(--navy);color:var(--ivory);border-radius:16px}
.th-l{margin:0 0 4px;color:var(--orange);font-size:.92rem}
.th-q{margin:0 0 10px;font-size:1.15rem}
.think .btn2{color:var(--ivory);border-color:var(--ivory);min-height:38px}
.think .btn2:hover{color:var(--navy)}
.th-a{display:none;margin:0}
.think.open .th-a{display:block}
.think.open .btn2{display:none}
.xpl{margin:18px 0;padding:18px;background:#fff;border:1.5px solid rgba(13,29,44,.2);border-radius:16px}
.xs0{display:flex;align-items:center;gap:12px;font-size:1.05rem}
.xs0 input{flex:1;min-height:0;padding:0;accent-color:var(--orange);border:0}
.xv{min-width:26px;font-weight:400;font-size:1.25rem}
.xbw{position:relative;padding:24px 0 26px}
.xb{display:flex;justify-content:space-between;align-items:flex-end;height:66px;border-bottom:4px solid var(--navy);border-radius:2px;transition:transform .2s}
.xp{display:flex;flex-direction:column;align-items:center;min-width:110px;padding:6px 10px;background:var(--ivory);border-radius:10px 10px 0 0}
.xp small{color:var(--soft);font-size:.86rem}
.xp b{font-weight:400;font-size:1.3rem}
.xf{position:absolute;left:50%;bottom:6px;width:0;height:0;margin-left:-14px;border-left:14px solid transparent;border-right:14px solid transparent;border-bottom:20px solid var(--orange)}
.xs{margin:0;color:var(--soft);text-align:center}
.xeq .xs{color:#1E7A45}
.xeq .xp{background:#E8F5EC}
.pstop.done .tick{background:var(--orange) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230D1D2C' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/70% no-repeat}

/* ======= v26: chunky brand system, less blog ======= */
main p,main li{color:inherit}
.sub{font-size:1.1rem}
.hero-text:not(.art-h){padding-block:44px 48px}
/* heavier panels replace hairline lists */
.units{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin-top:22px;border:0}
.unit{padding:18px;background:#fff;border:2px solid var(--navy);border-radius:16px}
.unit h3{margin:0 0 6px;font-size:1.2rem;font-weight:400;line-height:1.25}
.unit p{margin:0;font-size:1rem;line-height:1.4}
.cards.c3{gap:12px;margin-top:22px}
.cards.c3 .card-s,.bels .bel{padding:24px;border:2px solid var(--navy);border-radius:18px;background:#fff}
.cards.c3 .card-s h3,.bel h3{margin:0 0 10px;font-size:1.35rem;font-weight:400;line-height:1.2;border:0;padding:0}
.cards.c3 .card-s p,.bel p{margin:0;font-size:1.04rem;line-height:1.45}
.cards.c3 .card-s:nth-child(1),.bels .bel:nth-child(1){background:var(--navy);color:var(--ivory)}
.cards.c3 .card-s:nth-child(1) p,.cards.c3 .card-s:nth-child(1) h3,.bels .bel:nth-child(1) p,.bels .bel:nth-child(1) h3{color:var(--ivory)}
.cards.c3 .card-s:nth-child(2),.bels .bel:nth-child(2){background:var(--orange)}
.bels{display:grid;gap:12px;margin-top:22px;border:0}
@media(min-width:760px){.bels{grid-template-columns:repeat(3,minmax(0,1fr))}}
.whs{display:grid;gap:10px;margin-top:22px;border:0;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}
.wh{display:block;padding:20px;background:#fff;border:2px solid var(--navy);border-radius:16px}
.wh h3{margin:0 0 6px;font-size:1.2rem;font-weight:400}
.wh p{margin:0;font-size:1.02rem;line-height:1.4}
.whs.w3 .wh:nth-child(1){background:#fff}
.whs.w3 .wh:nth-child(2){background:var(--orange)}
.whs.w3 .wh:nth-child(3){background:var(--navy)}
.whs.w3 .wh:nth-child(3) h3,.whs.w3 .wh:nth-child(3) p{color:var(--ivory)}
.ticks{gap:8px;border:0}
.ticks li{padding:14px 16px 14px 46px;background-color:#fff;background-position:14px center;border:2px solid var(--navy);border-radius:12px}
.lmore{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr))}
.lmore a{display:block;padding:22px;background:#fff;border:2px solid var(--navy);border-radius:16px;text-decoration:none;transition:background .15s}
.lmore a:hover{background:var(--orange)}
.lmore b{display:block;font-weight:400;font-size:1.3rem}
.lmore span{font-size:1.02rem}
/* legal */
.prose.legal{max-width:none}
.pols{columns:1;column-gap:14px}
@media(min-width:800px){.pols{columns:2}}
.pol{break-inside:avoid;margin:0 0 14px;padding:22px;background:#fff;border:2px solid var(--navy);border-radius:16px}
.pol h2{margin:0 0 8px;font-size:1.3rem;font-weight:400}
.pol p,.pol li{font-size:1.03rem;line-height:1.48}
.pol p:last-child{margin-bottom:0}
/* lesson + guide hero */
.hero:has(.art-h){background:var(--navy);border-bottom:0;color:var(--ivory)}
.hero:has(.art-h) .crumb,.hero:has(.art-h) .crumb a,.hero:has(.art-h) .lede,.hero:has(.art-h) .art-t{color:var(--ivory)}
.hero:has(.art-h) .crumb span{opacity:.6}
.hero:has(.art-h) svg.h1svg,.hero:has(.art-h) svg.h1svg *{fill:var(--ivory)}
.art-h{padding-block:26px 30px;max-width:none}
.art-h .lede{max-width:40em;font-size:1.15rem}
svg.art-b{display:block;width:auto;max-width:100%;height:calc(var(--n,1)*clamp(38px,6.4vw,62px));margin:6px 0 2px}
.utr{display:flex;align-items:center;gap:14px;margin-top:20px;max-width:560px}
.utr p{flex:none;margin:0;font-size:.98rem;color:var(--ivory)!important}
.utr nav{flex:1;display:flex;gap:4px}
.ut{flex:1;height:9px;border-radius:5px;background:rgba(239,239,228,.26);position:relative}
.ut:hover{background:rgba(239,239,228,.5)}
.ut.done{background:var(--orange)}
.ut.cur{background:var(--ivory)}
.ut.cur.done{background:var(--orange);box-shadow:0 0 0 2px var(--ivory)}
.ut::after{content:"";position:absolute;inset:-12px 0}
.ut-c{flex:.55}
.prose-a>p{font-size:1.12rem;line-height:1.55}
.prose-a>h2{margin:38px 0 12px;font-size:1.65rem;font-weight:400}
.prose-a .ex{padding:20px 22px;border-left:0;border:2px solid var(--navy);background:#fff;border-radius:16px}
.prose-a .ex>h3{font-size:1.25rem}
.prose-a .ex>p{color:var(--navy);padding:9px 0 0;margin:9px 0 0;border-top:1.5px dashed rgba(13,29,44,.2)}
.prose-a .ex>p.in{animation:xin .22s ease-out}
.prose-a .ex [hidden]{display:none}
@keyframes xin{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:none}}
.xnext{display:block;min-height:42px;margin-top:14px;padding:6px 16px;font:inherit;color:var(--navy);background:var(--ivory);border:2px solid var(--navy);border-radius:10px;cursor:pointer}
.xnext:hover{background:var(--orange)}
.prose-a .ex-w{border-color:var(--orange);background:#FDF0DF}
@media print{.xnext{display:none}.prose-a .ex [hidden]{display:block}}
/* balance */
.xpl{padding:18px 18px 16px;background:#fff;border:2px solid var(--navy);border-radius:18px;transition:background .2s}
.xpl.xeq{background:#EAF6EE}
.bal{display:block;width:100%;max-width:520px;margin:0 auto;overflow:visible}
.bal .pst{fill:var(--orange)}
.bal .bs{fill:var(--navy)}
.bal .bm{stroke:var(--navy);stroke-width:7;stroke-linecap:round}
.bal .pv{fill:var(--ivory);stroke:var(--navy);stroke-width:4}
.bal .st{fill:none;stroke:var(--navy);stroke-width:2}
.bal .wt{fill:var(--orange);stroke:var(--navy);stroke-width:2}
.bal .pl{fill:var(--navy)}
.bal text{fill:var(--navy);font-family:var(--sans)}
.bal .vl,.bal .vr{font-size:22px}
.bal .ex{font-family:var(--math);font-style:italic;font-size:17px}
.xs0{display:flex;align-items:center;gap:14px;margin-top:24px;font-size:1.15rem}
.xs0>span{flex:none;min-width:74px}
.xv{font-weight:400;font-size:1.35rem}
.xs0 input[type=range]{flex:1;width:100%;min-width:0;height:34px;margin:0;padding:0;background:transparent;border:0;-webkit-appearance:none;appearance:none;touch-action:pan-y;cursor:grab;box-shadow:none}
.xs0 input::-webkit-slider-runnable-track{height:10px;background:var(--ivory);border:2px solid var(--navy);border-radius:6px}
.xs0 input::-moz-range-track{height:6px;background:var(--ivory);border:2px solid var(--navy);border-radius:6px}
.xs0 input::-webkit-slider-thumb{-webkit-appearance:none;width:32px;height:32px;margin-top:-13px;background:var(--orange);border:3px solid var(--navy);border-radius:50%}
.xs0 input::-moz-range-thumb{width:26px;height:26px;background:var(--orange);border:3px solid var(--navy);border-radius:50%}
.xs{margin:10px 0 0;min-height:1.5em;text-align:center;color:var(--navy)!important;font-size:1.05rem}
.xeq .xs{color:#17693A!important}
/* practice */
.prac{border-width:2.5px;border-radius:20px}
.pr-lvt{display:flex;gap:4px;flex:1;min-width:210px}
.pr-lvt .lv{flex:1;padding:4px 8px;font-size:.92rem;text-align:center;color:rgba(239,239,228,.65);background:rgba(239,239,228,.12);border-radius:7px}
.pr-lvt .lv.past{background:rgba(241,139,21,.4);color:var(--ivory)}
.pr-lvt .lv.on{background:var(--orange);color:var(--navy)}
.pr-q{font-size:1.28rem;line-height:1.4}
.pr-f{display:flex;gap:14px;align-items:flex-start}
.pr-f:empty{display:none}
.pr-f>img{flex:none;width:64px;height:64px}
.pr-fx{flex:1;min-width:0}
.pr-f .pr-v{margin:0;font-size:1.12rem;color:var(--navy)}
.pr-f.bad{padding:16px;background:#FDF0DF;border:2px solid var(--orange);border-radius:14px;color:var(--navy)}
.pr-f.good,.pr-f.shown{padding:16px;border-radius:14px}
.pr-f.good{background:#EAF6EE;border:2px solid #2E8B57}
.pr-f.shown{background:#fff;border:2px solid var(--navy)}
.pr-hint{margin:8px 0 0;color:var(--navy);font-size:1.03rem;line-height:1.45}
.pr-hint b{font-weight:400;color:#A85500}
.popt.wrong:disabled{opacity:.72;cursor:not-allowed}
@media(max-width:520px){.pr-f>img{width:46px;height:46px}}
/* course page */
.punit{margin:0 0 22px;padding:0;background:#fff;border:2.5px solid var(--navy);border-radius:20px;overflow:hidden}
.pu-h{display:grid;grid-template-columns:auto minmax(0,1fr);gap:4px 14px;padding:20px 22px;margin:0;background:var(--navy);color:var(--ivory)}
.pu-h h2,.pu-h p,.pu-h span{color:var(--ivory)}
.pu-h h2{margin:0;font-size:1.55rem;font-weight:400}
.pu-h p{margin:3px 0 0;font-size:1.02rem}
.pu-n{color:var(--orange)!important;font-size:2.4rem;line-height:1}
.pu-h>:last-child:not(div:nth-child(2)){grid-column:2}
.pu-g{margin:0;padding:16px 22px;background:var(--ivory);border-radius:0}
.pu-g p{color:var(--navy)}
.ppath{padding:8px 12px 12px}
.pstop{padding:13px 10px;gap:14px;border-radius:12px}
.pstop:hover{background:rgba(241,139,21,.14)}
.pstop.next{background:#FDF0DF}
.pstop b{font-weight:400;font-size:1.12rem}
.pstop small{color:var(--navy);font-size:.98rem}
.lvls i{width:11px;height:11px}
/* guides as tiles */
.course{margin:0 0 26px;background:none;border:0;border-radius:0;overflow:visible;scroll-margin-top:16px}
.course>header{padding:0 0 10px;background:none;color:var(--navy);display:flex;align-items:center;gap:12px}
.course>header h2{color:var(--navy);flex:1;margin:0;font-size:1.55rem;font-weight:400}
.course>header a{color:var(--navy)}
.course>header img{background:none;padding:0;width:34px;height:34px}
.lessons{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr))}
.lesson{position:relative;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:6px;padding:16px;background:#fff;border:2px solid var(--navy)!important;border-radius:16px;min-height:100%}
.lesson .tick{position:absolute;top:12px;right:12px;width:18px;height:18px;border-width:1.5px}
.lesson .l-m{display:flex;align-items:center;order:-1;width:100%;min-height:62px;padding-right:22px;font-size:1rem;overflow:hidden}
.lesson .l-m .katex-display{margin:0;text-align:left}
.lesson .l-m .katex-display>.katex{text-align:left}
.lesson b{font-weight:400;font-size:1.08rem;line-height:1.25}
.lesson small{font-size:.94rem;line-height:1.35;color:var(--navy)}
.lesson:hover{background:#FDF0DF}
/* formula tabs */
.fnav{position:sticky;top:0;z-index:5;flex-wrap:nowrap;overflow-x:auto;padding:10px 0;background:var(--ivory)}
.fnav a{flex:none;white-space:nowrap}
.fnav a.on{background:var(--navy);color:var(--ivory);border-color:var(--navy)}
.fsec.foff{display:none}
.fsec{margin-top:10px}
.fgr{grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:10px;padding:14px;background:var(--ivory)}
.fm{padding:14px 16px;background:#fff;border:0;border-radius:12px}
@media print{.fsec.foff{display:block}}
:root{--soft:#24384A}
.pr-f.bad,.pr-f.good,.pr-f.shown{margin:0 16px 14px}
.cards.c3 .card-s:nth-child(2) p,.cards.c3 .card-s:nth-child(2) h3,.bels .bel:nth-child(2) p,.bels .bel:nth-child(2) h3,.whs.w3 .wh:nth-child(2) p,.whs.w3 .wh:nth-child(2) h3{color:var(--navy)!important}
svg.art-b{height:calc(var(--n,1)*clamp(50px,6vw,76px))}
.prose-a .ex-w:not(:has(>img)){display:block}
.prose-a .ex-w:not(:has(>img))>*{width:auto;min-width:0}
.hero:has(.lib-h){background:var(--navy);border-bottom:0;color:var(--ivory)}
.hero:has(.lib-h) .lede{color:var(--ivory)}
.hero:has(.lib-h) svg.h1svg,.hero:has(.lib-h) svg.h1svg *{fill:var(--ivory)}
.hero svg.h1svg.art-b{width:auto!important;max-width:100%!important;height:calc(var(--n,1)*clamp(50px,6vw,76px))!important}
.pu-h .lprog{grid-column:1/-1;display:flex;align-items:center;gap:12px;width:100%;max-width:none;margin:12px 0 0}
.pu-h .lprog b{display:block;flex:1;height:9px;background:rgba(239,239,228,.26);border-radius:5px;overflow:hidden}
.pu-h .lprog i{display:block;height:100%;background:var(--orange)}
.pu-h .lprog span{flex:none}
.hero svg.h1svg.art-b{height:calc(var(--n,1)*clamp(48px,5vw,62px))!important}
.prac{background:#fff}
.prac .pr-h{background:var(--navy)}
.prac .pr-f.bad,.prac .pr-f.good,.prac .pr-f.shown{margin:14px 16px;padding:14px;border-radius:14px}
/* v27 course content */
.lkey{margin:18px 0;padding:16px 20px;background:var(--orange);border-radius:16px;font-size:1.12rem;line-height:1.45;color:var(--navy)}
.lkey b{font-weight:400;font-size:.95rem}
.lkey-r{background:var(--navy);color:var(--ivory);margin-top:30px}
.lkey-r b{color:var(--orange)}
.lfig{margin:16px 0;padding:14px;display:flex;flex-direction:column;align-items:center;gap:8px;background:#fff;border:2px solid var(--navy);border-radius:16px}
.lfig svg.lf{display:block;width:100%;max-width:340px;height:auto}
.lfig figcaption{font-size:1rem;text-align:center}
.pr-q svg.lf{display:block;width:100%;max-width:280px;height:auto;margin:0 0 10px}
.ltbl{overflow-x:auto;margin:16px 0}
.ltbl table{border-collapse:separate;border-spacing:0;width:100%;background:#fff;border:2px solid var(--navy);border-radius:14px;overflow:hidden;font-size:1.02rem}
.ltbl th{padding:10px 14px;background:var(--navy);color:var(--ivory);font-weight:400;text-align:left}
.ltbl td{padding:10px 14px;border-top:1.5px solid rgba(13,29,44,.15)}
.prose-a .ex>p.st{display:flex;flex-wrap:wrap;gap:4px 14px;justify-content:space-between;align-items:baseline}
.prose-a .ex .stm{font-size:1.14rem;margin-left:auto}
@media(max-width:520px){.prose-a .ex .stm{margin-left:0;width:100%}}
.prose-a .ex>p[hidden]{display:none!important}
.prose-a .ex-w .katex{font-size:1.05em}
.ltbl .katex{font-size:1.08em}
.lfig figcaption .katex{font-size:1.05em}
/* v28 mobile audit */
.popt,.pel,.psg,.pkey,.xnext,.lnk,.hintb,.pmv,.ptok,.fnav a,.mchips a,.lmore a,.pn{min-height:48px}
.pkey,.pmv{min-width:48px}
.pkeys{display:flex;gap:6px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding:2px 0;margin-top:8px}
.pkeys::-webkit-scrollbar{display:none}
.pkey{flex:none}
.pkeys.pk-on{position:fixed;left:0;right:0;z-index:60;margin:0;padding:7px 10px;background:var(--ivory);border-top:2px solid var(--navy)}
.kb-on .mbar{display:none!important}
.phints{margin:12px 0 0}
.hintb{display:block;width:100%;padding:8px 14px;font:inherit;text-align:left;color:var(--navy);background:var(--ivory);border:2px dashed rgba(13,29,44,.45);border-radius:12px;cursor:pointer}
.hintb:hover{border-color:var(--navy)}
.phint{margin:0 0 8px;padding:12px 14px;background:#FDF0DF;border-left:4px solid var(--orange);border-radius:8px;font-size:1.03rem;line-height:1.45}
.pr-run{padding:2px 9px;font-size:.95rem;color:var(--navy);background:var(--orange);border-radius:20px}
.pr-sk{color:#A85500!important}
.mstr{align-self:center;margin-left:auto;padding:2px 9px;font-size:.9rem;background:var(--orange);border-radius:20px}
.mstr+.lvls{margin-left:8px}
.lsum{margin:0 0 14px;padding:12px 16px;background:#fff;border:2px solid var(--navy);border-radius:12px}
.stm,.th-q,.pr-q,.pel span,.pcli,.ltbl td,.phint,.pr-hint{max-width:100%}
.stm,.kx,.prose-a .katex-display,.pr-q .katex-display{overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch}
.stm,.kx{background:linear-gradient(90deg,#fff 30%,transparent) left/28px 100% no-repeat local,linear-gradient(270deg,#fff 30%,transparent) right/28px 100% no-repeat local,linear-gradient(90deg,rgba(13,29,44,.16),transparent) left/10px 100% no-repeat scroll,linear-gradient(270deg,rgba(13,29,44,.16),transparent) right/10px 100% no-repeat scroll}
@media(max-width:560px){main small,.pstop small,.lesson small,.lprog,.pr-c,.lvls+*,.crumb{font-size:16px}main p,main li{font-size:max(16px,1em)}}
@media(max-width:560px){main small,main label,.psg,.btn2,.lnk,.ck,.th-l,main a{font-size:16px}main p{font-size:max(16px,1em)}.btn2,.chip{min-height:48px}.kk.gk{min-height:48px;min-width:48px}.gw .x{min-width:48px;min-height:48px}}
@media(max-width:560px){main small,main label,main .ck{font-size:16px!important}main p:not(.katex *){font-size:max(16px,1em)!important}main .btn2{min-height:48px!important;font-size:16px!important}main button.x{min-width:48px;min-height:48px}}
/* v29: phone bar, dark panels, mastery */
.pkeys{flex-wrap:nowrap!important}
.pkeys.pk-on{padding:5px 8px}
.pkeys.pk-on .pkey{min-height:42px;min-width:44px}
.think p,.think .th-q,.think .th-a{color:var(--ivory)!important}
.think .th-l{color:var(--orange)!important}
.think .th-a{font-size:1.08rem;line-height:1.5}
.mbar.mb-off{display:none!important}
.pr-more{margin:8px 0 0;font-size:1rem;color:#A85500}
.lpre{margin:0 0 18px;padding:12px 16px;background:var(--ivory);border-radius:12px;font-size:1rem}
.lpre[hidden]{display:none}
.ldash{margin:0 0 24px;padding:22px;background:var(--navy);border-radius:20px;color:var(--ivory)}
.pcourse{margin-top:0}
.ldash+.pcourse{margin-top:0}
.ld-t{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.ld-t h2{margin:0;font-size:1.45rem;font-weight:400;color:var(--ivory)}
.ld-t b{font-weight:400;font-size:1.6rem;color:var(--orange)}
.ld-bar{height:12px;margin:10px 0 16px;background:rgba(239,239,228,.2);border-radius:7px;overflow:hidden}
.ld-bar i{display:block;height:100%;background:var(--orange)}
.ld-s{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
@media(min-width:760px){.ld-s{grid-template-columns:repeat(4,minmax(0,1fr))}}
.ld-s div{padding:12px;background:rgba(239,239,228,.09);border-radius:12px}
.ld-s b{display:block;font-weight:400;font-size:1.5rem;color:var(--ivory)}
.ld-s span{font-size:.98rem;color:var(--ivory)}
.ld-c{display:inline-flex;margin-top:14px;background:var(--orange);color:var(--navy)}
.sk{flex:none;align-self:center;margin-left:auto;padding:3px 10px;font-size:.88rem;white-space:nowrap;border-radius:20px;background:rgba(13,29,44,.08);color:var(--navy)}
.sk+.lvls{margin-left:8px}
.sk.s1{background:#E7E3D2}
.sk.s2{background:#FBE0BC}
.sk.s3{background:#F7BE78}
.sk.s4{background:var(--orange)}
.umed{grid-column:1/-1;justify-self:start;margin-top:8px;padding:3px 11px;font-size:.92rem;color:var(--navy)!important;background:var(--orange);border-radius:20px}
.pr-skill{margin:6px 0;font-size:1.05rem}
.pr-skill .sk{display:inline-block;margin-left:4px;font-weight:400}
@media(max-width:560px){.pstop{flex-wrap:wrap}.pstop .ps-t{flex:1 1 calc(100% - 44px)}.pstop .sk{margin-left:40px}.pstop .sk+.lvls{margin-left:8px}}
/* v30 tree and badges */
.ld-u{display:grid;gap:8px;margin:0 0 14px;grid-template-columns:repeat(auto-fit,minmax(min(100%,210px),1fr))}
.ld-u a{display:block;padding:12px 14px;min-height:48px;color:var(--navy)!important;background:var(--ivory);border-radius:12px;text-decoration:none}
.ld-u a:hover{background:var(--orange)}
.ld-u b{display:block;font-weight:400;line-height:1.25}
.ld-u small{color:var(--navy);font-size:.95rem}
.lu-b{display:block;height:7px;margin:7px 0 3px;background:rgba(13,29,44,.15);border-radius:4px;overflow:hidden}
.lu-b i{display:block;height:100%;background:var(--navy)}
.ld-b{margin-top:18px}
.ld-b h3{margin:0 0 8px;font-size:1.1rem;font-weight:400;color:var(--ivory)}
.ld-b>div{display:grid;grid-template-columns:repeat(auto-fill,minmax(92px,1fr));gap:8px}
.bdg{display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 4px;text-align:center;border-radius:12px;background:rgba(239,239,228,.09);color:rgba(239,239,228,.55)}
.bdg small{font-size:.86rem!important;line-height:1.15;color:inherit!important}
.bdg.on{background:var(--orange);color:var(--navy)}
.pr-new{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center;margin:10px 0;padding:12px;background:#FDF0DF;border-radius:14px}
.pr-new p{width:100%;margin:0;text-align:center}
.pr-new .bdg{min-width:96px}
.pstop .tick{--p:0%;border:0!important;background:conic-gradient(var(--orange) var(--p),rgba(13,29,44,.16) 0)!important;display:grid;place-items:center;transform:none!important;border-radius:50%!important}
.pstop .tick:after{content:"";width:68%;height:68%;background:#fff;border-radius:50%}
.pstop.m4 .tick:after{background:var(--orange) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230D1D2C' stroke-width='4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/80% no-repeat;width:100%;height:100%}
.pstop.ps-c.done .tick{--p:100%}
.pstop.ps-c.done .tick:after{background:var(--orange);width:100%;height:100%}
.ps-c{border-top:2px dashed rgba(13,29,44,.2);margin-top:6px;padding-top:14px}
.pstop.next{box-shadow:inset 3px 0 0 var(--orange)}
.pkeys.pk-on{justify-content:flex-start}
.cta-b p,.ctab p,.sec-d p{color:inherit}
.seo-t{max-width:760px}
.seo-t h2{margin:0 0 10px;font-size:1.6rem;font-weight:400}
.seo-t p{font-size:1.08rem;line-height:1.55}
/* v32 reviews */
.rvsec{background:var(--navy)}
.rvsec svg.h2svg{color:var(--ivory)}
.rvg{display:grid;gap:12px;margin-top:22px;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));align-items:start}
.rv{margin:0;padding:22px;background:#fff;border-radius:18px;color:var(--navy)}
.rv-b{background:var(--orange)}
.rv-s{display:block;margin-bottom:10px;color:var(--orange);font-size:1.15rem;letter-spacing:2px}
.rv-b .rv-s{color:var(--navy)}
.rv blockquote{margin:0 0 14px;padding:0;border:0;font-size:1.08rem;line-height:1.5;color:var(--navy)}
.rv-b blockquote{font-size:1.2rem}
.rv figcaption b{display:block;font-weight:400;font-size:1.1rem}
.rv figcaption span,.rv figcaption small{display:block;font-size:.95rem;line-height:1.35}
.rv figcaption small{margin-top:2px;opacity:.82}
.rv-n{margin:16px 0 0;color:var(--ivory)!important}
.rv-n a{color:var(--ivory)}
.rvg-all .rv{border:2px solid var(--navy)}
.rvg-all{columns:1;display:block}
@media(min-width:760px){.rvg-all{columns:2;column-gap:14px}}
.rvg-all .rv{break-inside:avoid;margin:0 0 14px}
@media(max-width:560px){.rv figcaption small{font-size:16px!important}}
/* v33 resources */
.wslink{margin:18px 0;padding:12px 16px;background:#FDF0DF;border-radius:12px;font-size:1.05rem}
.fq{margin:0 0 12px}.fq h3{margin:0 0 4px;font-size:1.15rem;font-weight:400}.fq p{margin:0}
.rsec{margin:0 0 34px;scroll-margin-top:16px}.rsec h2{margin:0 0 12px;font-size:1.6rem;font-weight:400}
.rsgr{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(min(46%,190px),1fr))}
.rst1{display:flex;flex-direction:column;gap:4px;padding:10px;background:#fff;border:2px solid var(--navy);border-radius:14px;text-decoration:none}
.rst1:hover{background:#FDF0DF}.rst1 img{width:100%;height:auto;border:1px solid rgba(13,29,44,.15);border-radius:6px;margin-bottom:6px}
.rst1 b{font-weight:400;line-height:1.2}.rst1 small{font-size:.92rem}
.rsg{display:grid;gap:24px}@media(min-width:760px){.rsg{grid-template-columns:minmax(0,360px) minmax(0,1fr);align-items:start}}
.rsp img{display:block;width:100%;height:auto;border:2px solid var(--navy);border-radius:12px;background:#fff}
.rsb{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px}.rst h2{margin:20px 0 8px;font-size:1.4rem;font-weight:400}.rsl{padding-left:20px}.rsh{margin:0 0 14px;font-size:1.6rem;font-weight:400}
.info{max-width:760px;margin:auto}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
.prac:empty{min-height:360px}
@media(max-width:800px){input,select,textarea{font-size:16px}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
.rsb .btn2{display:inline-flex;align-items:center;min-height:48px;padding:0 18px;text-decoration:none}
@media(max-width:759px){.rsg .rsp{order:2}.rsg .rst{order:1}}

@font-face{font-family:"STIX Two Text";src:url(/assets/stix-two-text.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}