@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Libre+Caslon+Display&display=swap');
:root{--app-bg:#f5f4ef;--app-surface:#fffefa;--app-text:#20332f;--app-muted:#586660;--app-line:#d9ded5;--app-accent:#215aa6;--app-accent-strong:#19487f;--app-accent-soft:#e7effa;--app-radius-lg:20px;--app-radius-md:13px;--app-font:'DM Sans','Avenir Next',system-ui,sans-serif;--serif:'Libre Caslon Display',Georgia,serif;--navy:#152b36;--board:#29664f;--board-light:#306e56;--shadow:0 12px 40px #1d3c2f08}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--app-bg);color:var(--app-text);font:15px/1.65 var(--app-font);-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,select,a{touch-action:manipulation}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:var(--app-accent);text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #3b7dd2;outline-offset:4px}button,select{border:1px solid #bdc9bd;border-radius:7px;background:var(--app-surface);color:var(--app-text);min-height:42px;padding:8px 13px}button:hover:not(:disabled){border-color:var(--app-accent);color:var(--app-accent-strong)}h1,h2,h3,p{margin:0}h1,h2{font-family:var(--serif);font-weight:400;line-height:1.07;letter-spacing:-.7px}h2{font-size:40px}h3{font-size:17px;font-weight:600;line-height:1.4}p+p{margin-top:12px}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.skip-link{position:fixed;top:-100px;left:15px;z-index:100;background:white;padding:10px}.skip-link:focus{top:10px}.small{font-size:12px;line-height:1.65;color:var(--app-muted)}.eyebrow{font-size:10px;font-weight:650;letter-spacing:2px;line-height:1.7}.text-link{display:inline-block;font-size:13px;font-weight:600}.on-dark{color:#e0ebff}.button{display:inline-flex;align-items:center;justify-content:center;gap:25px;min-height:46px;padding:10px 20px;font-size:13px;font-weight:600;border:1px solid transparent;border-radius:7px;text-decoration:none}.primary{background:var(--app-accent);color:white}.primary:hover:not(:disabled){background:var(--app-accent-strong);color:white;border-color:var(--app-accent-strong)}.secondary{background:var(--app-surface);border-color:#bfcdbd}.full{width:100%;justify-content:space-between}.quiet-button{background:transparent;font-size:13px}.tag{display:inline-block;background:#edf0e8;border:1px solid #d1dacb;border-radius:4px;color:#405444;font-size:10px;font-weight:550;padding:3px 9px;white-space:nowrap}.analysis-card{background:var(--app-surface);border:1px solid var(--app-line);border-radius:var(--app-radius-md);box-shadow:var(--shadow)}
.masthead{max-width:1240px;padding:26px 0;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:var(--app-text);font-size:26px;font-weight:650;line-height:1.2;letter-spacing:-1.1px}.brand-light{font-weight:400}.brand small{display:block;font-size:8px;letter-spacing:2.2px;font-weight:500;margin-top:7px}.brand-mark{position:relative;width:39px;height:39px;flex-shrink:0}.brand-mark i{position:absolute;display:block;width:25px;height:25px;border-radius:50%;background:#1e3933;top:0;left:0;border:1px solid #1e3933}.brand-mark i+i{left:13px;top:13px;background:#f1f1e6;border:1px solid #8a9d8d}.sister-sites{display:flex;gap:23px}.sister-sites a{font-size:11px;color:#4e6057;text-decoration:none;border-bottom:1px solid #b5c0b0}.app-hero{max-width:1240px;position:relative;margin:0 auto;overflow:hidden;display:grid;grid-template-columns:1.1fr 1fr;background:radial-gradient(ellipse at 85% 50%,#2d514e,transparent 60%),var(--navy);color:#f6f6ea;border-radius:15px;min-height:300px}.hero-copy{padding:34px 46px;z-index:1}.hero-copy>.eyebrow{color:#c4d5ce;font-size:9px;letter-spacing:2.3px}.app-hero h1{font-size:64px;margin:15px 0 15px;line-height:.98;letter-spacing:-1.4px}.app-hero h1 em{font-weight:400;color:#ccdfcf}.lede{font-size:13px;line-height:1.8;color:#d7e1db}.app-meta{display:flex;gap:17px;flex-wrap:wrap;margin-top:24px;font-size:8px;color:#ccd8d1;letter-spacing:.5px}.app-meta span+span:before{content:'·';margin-right:17px}.hero-art{position:relative;isolation:isolate;min-height:300px}.art-grid{position:absolute;inset:-70px -20px -100px 0;transform:rotate(-18deg) skewY(9deg);background-image:linear-gradient(#c6e9d218 1px,transparent 1px),linear-gradient(90deg,#c6e9d218 1px,transparent 1px);background-size:58px 58px;mask-image:radial-gradient(ellipse,#000,transparent 70%)}.hero-disc{position:absolute;border-radius:50%;width:168px;height:168px;transform:rotateX(28deg) rotateZ(-15deg);box-shadow:10px 25px 26px #0005,inset 1px 1px 3px #ffffff60;top:47px;left:69px}.hero-disc.dark{background:radial-gradient(circle at 32% 25%,#4e5b59,#1c2729 58%,#111a1d 90%);border:6px solid #263330;border-bottom-width:13px}.hero-disc.light{background:radial-gradient(circle at 32% 25%,#fffef3,#d8ddd0 65%,#a4b5a5);left:200px;top:103px;width:175px;height:175px;border:6px solid #e6eadd;border-bottom:13px solid #b1c0ad}.art-coordinate{position:absolute;left:298px;top:52px;font:11px monospace;color:#c6d7cb;transform:rotate(-9deg);letter-spacing:2px}.art-caption{position:absolute;bottom:29px;left:80px;font-size:8px;letter-spacing:2.5px;color:#bdcfc5}.view-tabs{max-width:1240px;margin:15px auto 0;display:flex;align-items:center;gap:30px;border-bottom:1px solid #d2dbce;min-height:66px}.view-tabs a{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:14px;color:#5a675e;padding:18px 8px;border-bottom:3px solid transparent;align-self:stretch}.view-tabs a span{font-size:9px;opacity:.75}.view-tabs a[aria-current=page]{color:var(--app-accent-strong);font-weight:700;border-color:var(--app-accent)}.nav-note{margin-left:auto;font-size:11px;font-style:italic;color:#62715f}main{max-width:1240px;margin:0 auto;padding:35px 0 50px;min-height:400px}.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:25px}.section-heading .eyebrow{color:#58715c;margin-bottom:7px}.section-heading>p{color:var(--app-muted);font-size:12px;text-align:right}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}.board-panel{padding:0 26px 16px;overflow:hidden}.scoreboard{display:flex;align-items:center;gap:24px;padding:19px 0;max-width:600px;margin:auto}.player{flex:1;display:flex;align-items:center;gap:12px;padding:8px 10px;border:1px solid transparent;border-radius:8px}.player.active{border-color:#b8cbdd;background:#edf3fa}.mini-disc{display:inline-block;vertical-align:middle;width:26px;height:26px;border-radius:50%;flex-shrink:0}.mini-disc.black{background:radial-gradient(circle at 30% 25%,#4c5554,#121d20 70%);border:1px solid #45534f;box-shadow:0 2px 2px #0002}.mini-disc.white{background:radial-gradient(circle at 30% 25%,#fffffa,#d5d9cd);border:1px solid #687b63;box-shadow:0 2px 2px #0001}.player>div{display:flex;flex-direction:column;gap:1px}.player>div>span{font-size:11px;white-space:nowrap}.player strong{font-size:29px;line-height:1.2;font-weight:500;font-variant-numeric:tabular-nums}.turn-badge{font-size:8px;font-weight:700;letter-spacing:.7px;margin-left:auto;color:var(--app-accent-strong);white-space:nowrap}.score-divider{font-family:var(--serif);font-size:30px;color:#82907e}.board-wrap{background:#e7ebe0;border:1px solid #c3cebd;border-radius:10px;padding:13px 18px 20px;max-width:600px;margin:auto;box-shadow:inset 0 0 30px #12302608}.board{display:grid;grid-template-columns:20px minmax(0,1fr);grid-template-rows:20px minmax(0,1fr);max-width:560px;margin:auto}.axis{font-size:10px;font-weight:600;color:#465a48;user-select:none}.axis-top{grid-column:2;display:grid;grid-template-columns:repeat(8,1fr);text-align:center}.axis-left{grid-row:2;display:grid;grid-template-rows:repeat(8,1fr);align-items:center}.squares{grid-column:2;grid-row:2;display:grid;grid-template-columns:repeat(8,minmax(0,1fr));aspect-ratio:1;border:2px solid #164b38;box-shadow:0 6px 12px #193b2e18;background:#174e3b;border-radius:3px;overflow:hidden;gap:1px}.cell{position:relative;border:0;border-radius:0;aspect-ratio:1;min-height:0;min-width:0;padding:0;background:var(--board);display:grid;place-items:center}.cell:nth-child(16n+2),.cell:nth-child(16n+4),.cell:nth-child(16n+6),.cell:nth-child(16n+8),.cell:nth-child(16n+9),.cell:nth-child(16n+11),.cell:nth-child(16n+13),.cell:nth-child(16n+15){background:var(--board-light)}.cell:hover:not(:disabled){color:inherit;border:0}.cell.empty.legal:hover{background:#3d7c65}.cell[aria-disabled=true]{cursor:default}.cell:focus-visible{outline:3px solid #d4e9ff;outline-offset:-5px;z-index:2}.disc{width:78%;height:78%;border-radius:50%;display:none;box-shadow:2px 4px 4px #001b1760;pointer-events:none}.black .disc{display:block;background:radial-gradient(circle at 33% 25%,#525e57,#202e2a 50%,#0e1918 85%);border:1px solid #b5c9ac;border-bottom:4px solid #101f17}.white .disc{display:block;background:radial-gradient(circle at 33% 25%,#fffff5,#e6e9da 55%,#c0cfb8);border:1px solid #d5dec9;border-bottom:4px solid #b9c9ae}.move-dot{display:none;width:18%;height:18%;border:1px solid #dcefd3;background:#c2d7b2;border-radius:50%;pointer-events:none}.legal .move-dot{display:block}.inactive .legal .move-dot{opacity:.45}.cell.last .disc{box-shadow:0 0 0 3px #a9cfff,2px 4px 4px #001b1740}.move-tag{position:absolute;inset:0;display:grid;place-items:center;font-size:22px;font-weight:650;pointer-events:none}.black .move-tag{color:#d4e7ff}.white .move-tag{color:#174a8b}.cell.hint{box-shadow:inset 0 0 0 4px #b6d4ff;background:#164b77}.cell.hint .move-dot{display:none}.cell.hint .move-tag{color:white;font-size:26px}.flipped .disc{animation:flip-in .35s ease-out}@keyframes flip-in{0%{transform:scaleX(.12)}100%{transform:scaleX(1)}}.board-caption{display:flex;gap:22px;justify-content:center;align-items:center;font-size:10px;color:#53634f;padding:15px 0}.board-caption span{display:flex;align-items:center;gap:7px}.legend-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#71915d}.board-caption b{color:var(--app-accent-strong);font-size:16px;line-height:1}.game-toolbar{display:flex;align-items:center;gap:9px;border-top:1px solid var(--app-line);padding-top:15px;max-width:600px;margin:auto}.game-toolbar button{min-height:38px}.toggle{display:flex;align-items:center;gap:7px;font-size:11px;margin-left:auto;cursor:pointer}.toggle input{accent-color:var(--app-accent);width:15px;height:15px}.keyboard-note{color:#626e61;font-size:10px;margin:11px 0 0;text-align:center}.game-sidebar{display:grid;gap:17px}.settings{padding:23px}.settings>.eyebrow{color:#62735d;margin-bottom:12px}.game-status{font-size:19px;line-height:1.4;font-weight:550;margin-bottom:8px}.settings>.small{font-size:12px;min-height:36px}.field{display:grid;gap:5px;margin-top:16px}.field label,legend{font-size:11px;font-weight:600}select{width:100%;font-size:12px;min-width:0;padding:9px 10px;background:#f8f9f3}.settings fieldset{border:0;padding:0;margin:17px 0 20px}.color-options{display:flex;gap:8px;margin-top:8px}.color-options label{position:relative;flex:1;cursor:pointer}.color-options input{position:absolute;opacity:0}.color-options label>span{display:flex;align-items:center;justify-content:center;gap:10px;border:1px solid #bcc8b8;min-height:42px;border-radius:6px;font-size:12px}.color-options input:checked+span{border:2px solid var(--app-accent);background:var(--app-accent-soft);font-weight:700}.color-options input:checked+span:after{content:'✓';color:var(--app-accent)}.color-options input:focus-visible+span{outline:3px solid #3b7dd2;outline-offset:3px}.color-options .mini-disc{width:19px;height:19px}#settings-note{min-height:0;font-size:10px;line-height:1.6;margin-top:10px}.position-card{padding:22px}.card-heading{display:flex;align-items:center;justify-content:space-between;gap:15px}.position-card>.small{margin-top:7px}.metrics{width:100%;border-collapse:collapse;margin:12px 0;font-size:12px}.metrics th{font-weight:450;text-align:left}.metrics thead{font-size:10px;color:var(--app-muted)}.metrics td,.metrics th{padding:8px 0;border-bottom:1px solid #e1e6da}.metrics td{font-weight:600;text-align:center}.metrics th:not(:first-child){text-align:center}.position-tip{font-size:11px;line-height:1.75;color:#51624e;padding-left:12px;border-left:2px solid #a8bea0;margin:14px 0}.hint-panel{padding:21px;background:#edf3fc;border-color:#b8cee8}.hint-panel h3{font-size:25px;margin:8px 0}.hint-panel p{font-size:13px}.hint-panel .small{font-size:10px;margin-top:12px}.history-card{margin-top:24px;padding:24px}.history-card .eyebrow{color:#61715b;margin-bottom:6px}.history-card h3{font-family:var(--serif);font-size:27px;font-weight:400}.review-controls{display:flex;gap:7px;align-items:center;margin-top:19px;flex-wrap:wrap}.review-controls button{min-height:36px;font-size:12px}.review-controls>span{font-size:11px;margin:0 6px}.move-list{display:flex;gap:7px;flex-wrap:wrap;list-style:none;padding:0;max-height:170px;overflow:auto;margin:16px 0 0}.move-list button{display:flex;align-items:center;gap:6px;font-size:11px;padding:5px 9px;min-height:36px}.move-list button[aria-current=step]{background:#e5effd;border:2px solid var(--app-accent);padding:4px 8px}.move-list .mini-disc{width:13px;height:13px}.move-number{font-size:9px;color:var(--app-muted)}
.lesson-select{padding:18px 23px;display:flex;align-items:center;gap:20px;margin-bottom:24px}.lesson-select label{font-size:12px;white-space:nowrap;font-weight:600}.lesson-select select{width:auto;flex:1;max-width:550px;font-size:14px}.lesson-select>.small{margin-left:auto}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:40px;align-items:start}.lesson-board-panel{padding:24px;background:#edf0e6}.lesson-board-panel>.card-heading{margin-bottom:14px}.lesson-playback{display:flex;justify-content:center;gap:8px;margin-top:20px}.lesson-playback button{font-size:12px}.lesson-board-panel>.small{text-align:center;margin-top:12px;font-size:10px}.lesson-explanation{padding:12px 0}.lesson-explanation h2{font-size:46px;margin:15px 0}.lesson-intro{font-size:15px;color:var(--app-muted)}.step-card{background:var(--app-surface);border:1px solid var(--app-line);border-left:3px solid var(--app-accent);padding:20px;margin:23px 0}.step-card>.eyebrow{color:var(--app-accent-strong);margin-bottom:8px}.step-card>p+p{font-size:14px;margin-top:0}.lesson-explanation>.small{margin-top:20px;font-size:11px}.lesson-explanation>.quiet-button{margin-left:7px;font-size:12px}.feedback{font-size:13px;color:var(--app-accent-strong);min-height:24px;margin:12px 0}.lesson-explanation details{border-top:1px solid #d1dacb;padding:13px 0}.lesson-explanation summary{cursor:pointer;font-size:13px;font-weight:600;min-height:30px}.lesson-explanation details p{font-size:13px;color:#58644f;padding:8px 0}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#d5dece;border:1px solid #d5dece;border-radius:12px;overflow:hidden;margin-bottom:30px}.stat-grid article{padding:27px;background:#edf0e6}.stat-grid strong{display:block;font-family:var(--serif);font-size:43px;font-weight:400;line-height:1.2;margin:8px 0 12px}.stat-grid p{font-size:12px;color:#56634e}.stat-grid .eyebrow{color:#58694e}.discovery-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:25px}.rules-card{padding:35px}.rules-card h2{margin:10px 0 24px}.rules-list{list-style:none;padding:0}.rules-list li{display:flex;gap:20px;padding:18px 0;border-bottom:1px solid #e0e5da}.rules-list li>span{font-size:11px;color:#5a6c52;padding-top:3px}.rules-list h3{font-size:15px;margin-bottom:5px}.rules-list p{font-size:13px;color:var(--app-muted)}.rules-card>.text-link{margin-top:10px;font-size:11px}.discovery-aside{display:grid;gap:25px;align-content:start}.discovery-aside .analysis-card{padding:30px}.discovery-aside .analysis-card h3{margin:10px 0 15px}.discovery-aside .analysis-card p{font-size:13px}.blue-card{border-radius:13px;padding:35px;background:radial-gradient(ellipse at top right,#385886,transparent 70%),#173452;color:#f4f5ef}.blue-card .eyebrow{color:#c8d8e9}.blue-card h2{font-size:49px;margin:20px 0}.blue-card p{font-size:14px;color:#d6e2ee}.blue-card .text-link{margin-top:25px}.source-strip{background:#e8ece0;border:1px solid #cbd6c2;border-radius:12px;padding:30px;display:flex;align-items:center;gap:40px;margin-top:25px}.source-strip h3{font-family:var(--serif);font-size:29px;font-weight:400;margin:7px 0 10px}.source-strip p{font-size:13px;max-width:650px}.source-strip .button{white-space:nowrap;margin-left:auto}.loading-state,.error-state{background:#e8f0fa;border:1px solid #b7cce4;border-radius:10px;padding:25px}.error-state p{font-size:13px;margin:10px 0 17px}.error-state{margin-bottom:20px}footer{max-width:1240px;margin:auto;border-top:1px solid #cfd9c7;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:26px 0 35px;font-size:10px;color:#63715b}.footer-brand{font-family:var(--serif);font-size:24px;color:var(--app-text);text-decoration:none}dialog{border:1px solid #b6c6ae;border-radius:15px;padding:30px;max-width:450px;width:calc(100% - 35px);background:var(--app-surface);color:var(--app-text);box-shadow:0 20px 100px #0003}dialog::backdrop{background:#152b3670;backdrop-filter:blur(4px)}dialog h2{font-size:35px;margin:12px 0 20px}dialog p{font-size:14px}.dialog-actions{display:flex;gap:12px;margin-top:25px}
@media(min-width:1450px){.app-hero h1{font-size:69px}.hero-copy{padding-top:40px;padding-bottom:40px}}
@media(max-width:1320px){.masthead,.app-hero,.view-tabs,main,footer{margin-left:32px;margin-right:32px}}
@media(max-width:1000px){.game-layout{grid-template-columns:minmax(0,1fr) 280px;gap:18px}.settings,.position-card{padding:19px}.board-panel{padding:0 17px 15px}.hero-copy{padding:35px}.app-hero h1{font-size:57px}.hero-disc{left:30px}.hero-disc.light{left:140px}.art-caption{left:30px;font-size:7px}.art-coordinate{left:230px}.game-toolbar{flex-wrap:wrap}.game-toolbar .toggle{font-size:10px}.scoreboard{gap:8px}.player{gap:7px;padding:7px}.turn-badge{font-size:7px}.player .mini-disc{width:20px;height:20px}.lesson-layout{gap:25px}.lesson-explanation h2{font-size:39px}.sister-sites{gap:15px}}
@media(max-width:760px){.masthead,.app-hero,.view-tabs,main,footer{margin-left:18px;margin-right:18px}.masthead{padding:20px 0}.brand{font-size:23px;gap:10px}.brand small{font-size:6px;letter-spacing:1.7px}.sister-sites{gap:12px}.sister-sites a{font-size:10px}.sister-sites a:last-child{display:none}.app-hero{grid-template-columns:1.3fr 1fr;min-height:270px}.hero-copy{padding:30px 26px}.app-hero h1{font-size:51px}.hero-copy>.eyebrow{font-size:7px;letter-spacing:1.6px}.hero-art{min-height:270px}.hero-disc{left:0;top:50px;width:120px;height:120px}.hero-disc.light{left:65px;top:120px;width:125px;height:125px}.art-caption{display:none}.art-coordinate{left:105px;top:48px;font-size:9px}.lede{font-size:11px}.app-meta{font-size:7px;gap:9px}.app-meta span+span:before{margin-right:9px}.app-meta span:last-child{display:none}.nav-note{font-size:9px}.view-tabs{gap:20px}.game-layout{grid-template-columns:1fr}.game-sidebar{grid-template-columns:1fr 1fr;gap:18px}.settings{grid-row:span 2}.position-card{grid-column:2}.hint-panel{grid-column:2}.board-panel{padding-left:25px;padding-right:25px}.board-wrap{padding-right:23px}.section-heading h2{font-size:35px}.section-heading>p{font-size:10px}.section-heading{margin-bottom:20px}.scoreboard{padding:14px 0;gap:20px}.player{padding:8px 13px;gap:13px}.player .mini-disc{width:26px;height:26px}.player>div>span{font-size:12px}.turn-badge{font-size:8px}.game-toolbar{justify-content:center}.game-toolbar .toggle{font-size:12px}.lesson-layout{grid-template-columns:1fr;gap:18px}.lesson-board-panel .board{max-width:500px}.lesson-select{gap:12px;padding:15px}.lesson-select>.small{display:none}.lesson-select select{font-size:13px}.lesson-explanation{padding:6px}.lesson-explanation h2{font-size:40px}.stat-grid article{padding:21px 18px}.stat-grid strong{font-size:34px}.stat-grid p{font-size:11px}.discovery-layout{grid-template-columns:1fr}.discovery-aside{grid-template-columns:1fr 1fr;gap:18px}.blue-card{padding:26px}.blue-card h2{font-size:38px}.discovery-aside .analysis-card{padding:26px}.source-strip{gap:20px;flex-wrap:wrap}.source-strip .button{margin-left:0}footer>span:nth-child(2){display:none}}
@media(max-width:480px){body{padding-bottom:calc(65px + env(safe-area-inset-bottom));padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}.masthead{margin:0 16px;padding:16px 0;gap:8px}.brand{font-size:21px}.brand-mark{width:33px;height:33px}.brand-mark i{width:22px;height:22px}.brand-mark i+i{left:11px;top:11px}.brand small{font-size:5px;letter-spacing:1.6px}.sister-sites a{font-size:9px}.sister-sites{gap:9px}.app-hero{margin:0 12px;display:block;min-height:0}.hero-copy{padding:25px 24px}.app-hero h1{font-size:49px;position:relative;z-index:1}.hero-copy>.eyebrow{font-size:6px;letter-spacing:1.4px}.hero-art{position:absolute;right:-40px;top:8px;width:155px;height:190px;min-height:0;opacity:.8}.hero-disc{width:90px;height:90px;top:30px;left:10px}.hero-disc.light{width:100px;height:100px;left:40px;top:90px}.art-coordinate{display:none}.lede{font-size:11px;max-width:270px}.app-meta{margin-top:18px;font-size:7px;gap:8px}.view-tabs{position:fixed;bottom:0;left:0;right:0;z-index:20;margin:0;background:#fbfcf6f5;backdrop-filter:blur(15px);border:0;border-top:1px solid #b7c7af;box-shadow:0 -4px 20px #142b3610;min-height:60px;gap:6px;padding:6px 8px calc(6px + env(safe-area-inset-bottom))}.view-tabs a{flex:1;justify-content:center;padding:9px 7px;border-bottom:0;border-radius:6px;font-size:13px;gap:7px;min-height:44px}.view-tabs a[aria-current=page]{background:var(--app-accent-soft);box-shadow:inset 0 0 0 1px #aac1df}.nav-note{display:none}.view-tabs a span{font-size:8px}main{margin:0 12px;padding:25px 0 30px}.section-heading{margin-bottom:18px;display:block}.section-heading h2{font-size:34px}.section-heading>.eyebrow,.section-heading>div>.eyebrow{font-size:8px;letter-spacing:1.6px}.section-heading>p{margin-top:10px;text-align:left;font-size:11px}.section-heading>p br{display:none}.game-layout{gap:16px}.board-panel{padding:0 10px 13px}.board-wrap{padding:8px 10px 12px 7px;border-radius:7px}.board{grid-template-columns:16px minmax(0,1fr);grid-template-rows:18px minmax(0,1fr)}.axis{font-size:8px}.scoreboard{gap:8px;padding:12px 0}.player{padding:6px 8px;gap:8px}.player .mini-disc{width:22px;height:22px}.player>div>span{font-size:10px}.player strong{font-size:25px}.turn-badge{font-size:6px}.score-divider{font-size:20px}.board-caption{font-size:8px;gap:15px;padding:13px 0}.board-caption b{font-size:13px}.game-toolbar{gap:6px;padding-top:11px;justify-content:start}.game-toolbar button{padding:7px 10px;font-size:11px;min-height:42px}.game-toolbar .toggle{font-size:10px;gap:4px}.toggle input{width:14px;height:14px}.keyboard-note{font-size:9px}.game-sidebar{grid-template-columns:1fr;gap:16px}.settings{grid-row:auto;padding:22px}.settings .field{margin-top:13px}.position-card,.hint-panel{grid-column:auto}.settings>.eyebrow{margin-bottom:8px}.settings>.small{min-height:0}.settings select,.lesson-select select{font-size:16px;min-height:44px}.settings fieldset{margin:14px 0 18px}.game-status{font-size:20px}.history-card{padding:19px;margin-top:16px}.history-card h3{font-size:24px}.history-card>.card-heading{align-items:start;gap:6px}.review-controls{gap:5px}.review-controls>span{font-size:9px;margin:0 2px}.review-controls button{padding:7px 9px;min-height:42px;font-size:11px}.move-list button{min-height:42px}.lesson-select{display:block;padding:15px}.lesson-select label{display:block;margin-bottom:6px}.lesson-select select{width:100%;max-width:100%}.lesson-board-panel{padding:15px 10px}.lesson-playback{gap:7px}.lesson-playback button{min-height:44px}.lesson-explanation h2{font-size:38px}.lesson-intro{font-size:14px}.lesson-explanation>.quiet-button{margin-left:0}.lesson-explanation summary{min-height:44px;display:flex;align-items:center}.stat-grid{grid-template-columns:1fr;margin-bottom:18px}.stat-grid article{padding:20px 23px}.stat-grid strong{font-size:37px;margin:4px 0 8px}.stat-grid p{font-size:12px}.stat-grid .eyebrow{font-size:9px}.rules-card{padding:24px}.rules-card h2{font-size:35px}.rules-list li{gap:15px}.discovery-aside{grid-template-columns:1fr}.blue-card{padding:30px}.source-strip{padding:24px}.source-strip h3{font-size:27px}footer{margin:0 16px;padding:20px 0;flex-wrap:wrap;gap:10px}.footer-brand{font-size:23px}footer>span{font-size:9px}.move-tag{font-size:17px}.cell.hint .move-tag{font-size:21px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}