/* Learning experience: calm surfaces, visible actions, touch-ready controls. */
:root{--ink:#edf0f7;--muted:#adb7ca;--faint:#8c99b1;--border:#2b3446;--border-strong:#3c4860;--ground:#0d111a;--surface:#171e2c;--surface-2:#202a3b;--shadow:0 12px 32px #00000020;--game:#d3efa5;--game-soft:#263627}
body{min-height:100dvh;background:var(--ground)}
body.modal-open{overflow:hidden}
button,input,select,textarea,a{-webkit-tap-highlight-color:transparent}
button,.btn,.fchip{min-height:44px}
button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #9ae9e0;outline-offset:4px}
button:disabled{cursor:wait}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:10px 16px;border-radius:12px;background:#202b3b;font-weight:600;text-decoration:none;box-shadow:none;line-height:1.35}
.btn.primary{background:#8ee8dd;color:#102b2e;border:1px solid #8ee8dd;box-shadow:none}
.btn.primary:hover{background:#b4f7ee;box-shadow:none;transform:translateY(-1px)}
.btn.sm{min-height:40px;padding:8px 12px;font-size:.8rem}
.btn:hover{box-shadow:none}
.full-width{width:100%;margin-top:16px}
.skip-link{position:fixed;top:8px;left:12px;z-index:100;background:#c6fff4;color:#102b2e;padding:12px;transform:translateY(-180%)}
.skip-link:focus{transform:translateY(0)}
.live-note{font-family:var(--sans);font-size:.72rem;line-height:1.6;padding:7px 16px;color:#a3b0c7;background:#101521;border-bottom:1px solid #ffffff0a;letter-spacing:.02em}
.bar{padding:16px 22px}
.brand{font-size:1.12rem;gap:11px}
header.app{background:#101620ed;backdrop-filter:blur(20px);border-bottom:1px solid #ffffff0d}
nav.tabs{gap:5px;padding:0 22px 10px;scrollbar-width:thin}
nav.tabs button{padding:10px 15px;min-height:44px;font-size:.85rem;border-radius:11px;color:#a6b1c5;flex:none}
nav.tabs button.active{background:#233a40;border:1px solid #42777a;color:#aff7ee}
main{max-width:1200px;padding:30px 24px 72px;min-height:65dvh}
.initial-loading{padding:90px 24px;text-align:center;color:var(--muted)}
.catalog-kicker{font:500 .66rem/1.6 var(--mono);letter-spacing:.16em;color:#8ee8dd;margin:0 0 12px}
.status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#9ae9e0;box-shadow:0 0 12px #9ae9e040;margin-right:6px}
.liquid-surface{background:#171e2aed;border:1px solid #343d51;box-shadow:inset 0 1px #ffffff06,0 16px 42px #00000020}
.catalog-hero{grid-template-columns:1.08fr 1fr;min-height:398px;border-radius:24px;margin-bottom:18px}
.catalog-copy{padding:42px 38px;justify-content:center}
.catalog-copy h1{font-size:clamp(2.7rem,4.5vw,3.7rem);letter-spacing:-.035em;line-height:1.15;margin:0 0 20px}
.catalog-copy h1 em{background:linear-gradient(115deg,#adf2eb 12%,#b5adfb 80%);background-clip:text;-webkit-background-clip:text}
.catalog-copy>p:not(.catalog-kicker){font-size:.94rem;line-height:1.85;color:#adb8cd;margin:0;max-width:440px}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:25px}
.hero-actions .btn{font-size:.81rem;padding:11px 14px}
.hero-disciplines{display:flex;gap:18px;flex-wrap:wrap;margin-top:22px;color:#8c99b1;font-size:.7rem}
.hero-disciplines span::before{content:'';display:inline-block;width:4px;height:4px;border-radius:50%;background:#7f91b1;margin-right:7px;vertical-align:middle}
.catalog-scene{background:radial-gradient(ellipse at center,#172533,#0a0f19 72%);min-height:398px}
.scene-label{font-size:.6rem;color:#8898b5;letter-spacing:.09em}
.quick-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:40px}
.quick-actions>button{min-width:0;display:flex;align-items:center;gap:13px;text-align:left;padding:17px 18px;border:1px solid #303b4f;background:#151e2b;border-radius:16px;color:var(--ink);transition:border-color .15s,background .15s}
.quick-actions>button:hover{background:#1c2a39;border-color:#7ab3b2}
.quick-symbol{display:grid;place-items:center;flex:none;width:38px;height:38px;background:#263c45;color:#aaece4;font-size:1.25rem;border-radius:11px}
.quick-actions>button>span:nth-child(2){flex:1;min-width:0}
.quick-actions b,.quick-actions small{display:block}
.quick-actions b{font-size:.86rem;margin-bottom:3px}
.quick-actions small{font-size:.71rem;font-weight:400;color:#9dabc1;line-height:1.65}
.quick-actions>button>span:last-child{color:#9ca9c0;font-size:1.1rem}
.quick-actions .game-shortcut .quick-symbol{color:var(--game);background:var(--game-soft)}
.quick-symbol svg{width:28px;height:28px}
.learning-emblem svg{width:76%;height:76%;display:block}
.gallery-toolbar{scroll-margin-top:155px;display:grid;grid-template-columns:1fr auto;gap:14px;padding:0 0 18px;border:0;border-bottom:1px solid #2c3546;box-shadow:none;border-radius:0;background:transparent;backdrop-filter:none;overflow:visible;margin-bottom:22px}
.gallery-toolbar::before,.gallery-toolbar::after{display:none}
.gallery-toolbar h2{font-size:1.5rem;letter-spacing:.02em;margin:0}
.gallery-toolbar .catalog-kicker{margin-bottom:4px}
.gallery-controls{grid-column:1/-1;grid-row:2;display:flex;justify-content:space-between;gap:14px}
.gallery-count{grid-column:2;grid-row:1;align-self:center;font-size:.78rem;color:#a7b3ca}
.filters{gap:7px;margin:0;flex-wrap:wrap}
.fchip{border:1px solid #354157;background:#17202e;border-radius:10px;color:#a9b6cb;padding:8px 14px;font-size:.79rem;box-shadow:none!important}
.fchip.on:not(.ai):not(.draw):not(.gen){background:#edf0f7;color:#152030;border-color:#edf0f7}
.fchip.on.ai{background:#24494d}.fchip.on.draw{background:#63432d}.fchip.on.gen{background:#473c65}
.fchip.on.game{background:#334d30;color:#e0f8b4;border-color:#668f57}
.work-search{width:280px;min-height:44px;padding:9px 13px;border-radius:11px;background:#151d2b;border-color:#3b475c;box-shadow:none}
.work-search input{font-size:.81rem}
.catalog-wall{grid-template-columns:repeat(auto-fill,minmax(285px,1fr));gap:22px}
.art{border-radius:19px;overflow:hidden;background:#171e2c;backdrop-filter:none;border:1px solid #323c50;box-shadow:none}
.art:hover{transform:translateY(-4px);border-color:#779999;box-shadow:0 14px 32px #00000025}
.work-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:#101727}
.work-cover.game{background:radial-gradient(circle at 50% 40%,#4a673b,#18251c 72%)}
.cover-img{height:100%;width:100%;object-fit:cover;display:block;transition:transform .3s}
.art:hover .cover-img{transform:scale(1.025)}
.cover-category{position:absolute;left:13px;top:13px;border:1px solid #ffffff30;border-radius:7px;background:#0b1024b8;padding:5px 8px;color:#fff;font-size:.63rem;backdrop-filter:blur(8px)}
.cover-placeholder{height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:12px;background:radial-gradient(circle at 50% 40%,#597a8140,transparent 60%)}
.cover-placeholder>span{font-size:3rem;font-weight:300;color:#d3d8ec}.cover-placeholder small{font-size:.7rem;letter-spacing:.14em;color:#c3cadb}
.art .body{padding:20px;gap:10px;flex:1;display:flex;flex-direction:column}
.art h3.ttl{margin:0;font-family:var(--sans);font-size:1.1rem;font-weight:700;line-height:1.4}
.art .desc{margin:0;font-size:.81rem;line-height:1.8;color:#aeb8cc;min-height:2.9em}
.art .meta{margin-top:auto;display:flex;align-items:center;gap:8px;padding-top:5px;color:#96a5bd;font-size:.74rem}
.author-dot{width:23px;height:23px;display:grid;place-items:center;background:#2e394c;border-radius:50%;font-size:.61rem;color:#d0dbeb}
.card-action{width:100%;margin-top:10px!important;display:flex;justify-content:space-between;background:#222e42;border-color:#3b4b64;color:#dce8fa;min-height:44px!important;font-size:.79rem;border-radius:10px;text-align:left}
.card-action:hover{background:#304359;border-color:#91cfc8}
.card,.hwitem{background:#171e2c;border:1px solid #303b4e;border-radius:18px;box-shadow:inset 0 1px #ffffff05}
.card{padding:24px}.card h2{font-size:1.15rem;margin:0 0 8px}
.fld{font-size:.82rem;color:#ced7e5;font-weight:500;margin-top:18px}
input[type=text],input[type=url],input[type=datetime-local],input[type=file],textarea,select{max-width:100%;border-radius:10px;border:1px solid #3a475e;background:#111926;color:#edf0f7;font:400 .88rem/1.6 var(--sans);padding:11px 12px;min-height:44px;box-sizing:border-box}
input[type=file]{font-size:.76rem;width:100%;padding:10px}
input[type=file]::file-selector-button{padding:7px 10px;border-radius:7px;border:1px solid #4b5e79;background:#24364a;color:#e7f4ff;margin-right:12px;cursor:pointer}
input::placeholder,textarea::placeholder{color:#8898b1;opacity:1}
textarea{resize:vertical;min-height:120px}
.mini,.hint{line-height:1.7;color:#99a9c0}
.hint{font-size:.73rem;margin:8px 0}
.notice{font-size:.81rem;line-height:1.75;border-radius:11px;padding:13px 15px;background:#202b3a;border:1px solid #344359;color:#bfcbdf}
.notice.warn{background:#3e3020;border-color:#755732;color:#f2d39a}.notice.good{background:#203d37;border-color:#345f53;color:#b5e9ce}
.locked{border:1px solid #303e52;border-radius:18px;background:#171f2d;padding:42px 24px;margin-top:20px;color:#a9b8d0;text-align:center}
.locked h2{color:#e4edf9;font-size:1.3rem}.locked p{font-size:.88rem;line-height:1.8}.locked .btn{margin:12px 0}
.learning-hero{padding:30px 34px;border-radius:22px;border:1px solid #344057;background:linear-gradient(110deg,#202a3c,#151e2b);display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:20px}
.learning-hero h1{font:700 2.2rem/1.3 var(--sans);letter-spacing:-.03em;margin:0 0 13px}
.learning-hero p:not(.catalog-kicker){font-size:.9rem;line-height:1.8;color:#afbed1;margin:0;max-width:610px}
.learning-emblem{width:98px;height:98px;flex:none;display:grid;place-items:center;font:300 4rem var(--sans);border-radius:28px;background:#2d3b58;color:#adbcff;box-shadow:inset 0 1px #ffffff16;transform:rotate(-9deg)}
.game-hero{background:linear-gradient(110deg,#233234,#192530 75%);border-color:#435a53}.game-hero .catalog-kicker{color:var(--game)}.game-hero .learning-emblem{background:#344935;color:var(--game)}
.homework-tabs{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 24px}
.homework-tab{display:flex;align-items:center;gap:12px;border:1px solid #354156;border-radius:12px;background:#171f2c;color:#aebcd1;padding:10px 18px;font:.84rem var(--sans)}
.homework-tab.active{background:#e2e8f3;color:#182238;border-color:#e2e8f3;font-weight:700}
.homework-tab>span{font:500 .7rem var(--mono);border-radius:5px;background:#879cb620;min-width:20px;line-height:21px;text-align:center}
.game-guidance{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:4px 0 24px;border-bottom:1px solid #35414f;padding-bottom:24px}
.game-guidance>span{font-size:.8rem;line-height:1.8;color:#b8c7d5}.game-guidance b{display:inline-block;font:500 .75rem var(--mono);padding-right:9px;color:var(--game)}
.section-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:24px 0 18px}.section-heading h2{font-size:1.13rem;margin:0}.section-heading .catalog-kicker{margin-bottom:4px}
.count-chip{font-size:.72rem;color:#b4c5da;border:1px solid #3a4860;padding:6px 10px;border-radius:8px;white-space:nowrap}
.assignment-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.assignment-card{padding:24px}.assignment-card h3{font-size:1.09rem;line-height:1.65;margin:14px 0 7px}.assignment-card .assignment-row{align-items:center}
.assignment-description,.submission-note{font-size:.85rem;line-height:1.85;white-space:pre-wrap;overflow-wrap:anywhere;color:#b6c3d6;margin:8px 0 16px}
.assignment-info{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:.72rem;color:#90a5c1;border-top:1px solid #2e3a4c;padding-top:13px;margin-bottom:14px}
.assignment-card .actions{margin-top:16px;gap:8px;flex-wrap:wrap}
.tag.game{background:#314329;color:var(--game);border:1px solid #527049}
.game-assignment{border-top:2px solid #738d56}
.pill{font-size:.69rem;line-height:1.6;white-space:nowrap;padding:5px 9px}.pill.ok{color:#b7efcb;background:#243e31}.pill.wait{color:#f5d390;background:#443722}.pill.no{color:#c0d4fa;background:#293951}
.homework-teacher-layout{display:grid;grid-template-columns:minmax(285px,.8fr) minmax(0,1.4fr);gap:22px;align-items:start}
.homework-teacher-layout .stack{gap:18px;min-width:0}
.assignment-create .form-grid{grid-template-columns:1fr}
.submission-progress{margin:16px 0 0;font-size:.76rem;color:#bed1e8}.submission-progress progress{width:100%;height:6px;display:block;margin-top:10px;accent-color:#96dace}
.missing-students{font-size:.76rem;line-height:1.8;margin-top:15px;color:#b1bfd3}.missing-students summary{cursor:pointer;min-height:32px;padding:5px 0}.missing-students p{margin:8px 0;overflow-wrap:anywhere}
.homework-review{margin-top:24px}.homework-review .section-heading{margin-top:0}
.submission-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;padding:22px 0;border-bottom:1px solid #2e394c}.submission-row:first-child{padding-top:12px}.submission-row:last-child{border-bottom:0}.submission-row>b,.submission-row b{font-size:.89rem}.submission-row>.actions{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:9px}.submission-row .pill{align-self:start}.submission-row .mini{margin:5px 0}
.empty-card{grid-column:1/-1;padding:45px 24px;width:100%;border:1px dashed #3e4a60;border-radius:16px;background:#141d2a;text-align:center;color:#a9b9ce}.empty-card h3{font:600 1rem var(--sans);color:#d1ddef;margin:12px 0}.empty-card p{font-size:.83rem;line-height:1.85;max-width:400px;margin:10px auto}.empty-symbol{display:block;color:#93a8cb;font:300 2rem var(--sans)}
.modal{padding:20px;background:#050911db;backdrop-filter:blur(8px);z-index:80;overflow-y:auto}
.modal .box{max-height:calc(100dvh - 40px);overflow:auto;border:1px solid #3d4a63;background:#151e2b;box-shadow:0 24px 90px #00000080;border-radius:20px}
.modal .top{padding:16px 20px;gap:12px;position:sticky;top:0;z-index:2;background:#182232;border-bottom:1px solid #364156}
.modal .top h2{font:700 1.16rem/1.5 var(--sans);margin:0;overflow-wrap:anywhere}.modal .top b{font-family:var(--sans);font-size:1rem}
.x{width:40px;height:40px;min-height:40px;flex:none;color:#d3def1;background:#2a374c;border-radius:11px}
.modal .submission-box{max-width:560px}.submission-form{padding:22px}.submission-form textarea{width:100%}.form-divider{display:flex;align-items:center;gap:12px;margin:23px 0 6px;color:#9bacc6;font-size:.72rem}.form-divider::before,.form-divider::after{content:'';height:1px;flex:1;background:#354157}
.form-error{font-size:.82rem;color:#ffcec1;background:#482923;border:1px solid #986757;padding:12px;border-radius:10px;line-height:1.7}
.p5-viewer-meta{padding:17px 22px;background:#141e2c;border-bottom:1px solid #344255}.p5-viewer-label{font-size:.67rem;letter-spacing:.09em;color:#8cb8c8}.p5-viewer-meta p{font-size:.87rem;line-height:1.85;margin-top:5px;color:#c3d0e3}
.p5-viewer-stage .p5-runner-host{height:min(62dvh,650px);min-height:260px}.p5-viewer-stage iframe{height:100%!important;width:100%;min-height:260px}.viewer-status{margin:0;padding:12px 22px;font-size:.8rem;background:#253248;color:#bed0e5}
.image-viewer-box{width:min(1000px,100%)!important;max-width:1000px!important}.full-artwork{display:block;width:100%;height:auto;max-height:68dvh;object-fit:contain;background:#090f19}.image-description{margin:0;padding:18px 22px;color:#bbcce1;white-space:pre-wrap;line-height:1.8}
.site-footer{padding-bottom:30px}.site-footer b{font-family:var(--sans);font-size:.72rem}.site-footer span{color:#93a1b7}
.prow,.assignment-row,.toolbar,.form-grid>div{min-width:0}.prow{gap:12px}.prow b,.prow .mini{overflow-wrap:anywhere}.actions{flex-wrap:wrap}
@media(min-width:1000px){.catalog-wall{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:920px){.hero-actions{gap:8px}.catalog-copy{padding:30px}.catalog-copy h1{font-size:3rem}.catalog-hero{grid-template-columns:1fr 1fr}.quick-actions{gap:9px}.quick-actions>button{padding:14px 12px;gap:9px}.quick-actions small{font-size:.66rem}.quick-symbol{width:32px;height:32px}.game-guidance{gap:8px}}
@media(max-width:760px){main{padding:20px 16px 55px}.bar{padding:13px 16px}.catalog-hero{grid-template-columns:1fr}.catalog-copy{padding:30px}.catalog-scene{min-height:235px;border-top:1px solid #344157}.catalog-scene #heroMount,.featured-stage #heroMount{min-height:235px}.quick-actions{grid-template-columns:1fr}.quick-actions>button{padding:13px 16px}.quick-actions small{font-size:.73rem}.quick-symbol{width:36px;height:36px}.gallery-controls{flex-direction:column}.work-search{width:100%}.catalog-wall{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.gallery-toolbar{grid-template-columns:1fr auto}.gallery-count{display:block}.homework-teacher-layout,.assignment-grid{grid-template-columns:1fr}.learning-hero{padding:25px}.learning-hero h1{font-size:1.8rem}.learning-emblem{width:65px;height:65px;font-size:2.8rem;border-radius:18px}.game-guidance{grid-template-columns:1fr;gap:9px}.card{padding:20px}.assignment-card{padding:22px}.form-grid{grid-template-columns:1fr}.modal{padding:12px}.modal .box{max-height:calc(100dvh - 24px)}.p5-workbench{grid-template-columns:1fr}.p5-source{font-size:.82rem}.p5-viewer-box{width:100%!important}.hero-actions .btn{font-size:.79rem}.homework-review .section-heading{align-items:flex-start;flex-wrap:wrap}}
@media(max-width:500px){.live-note{font-size:.65rem;line-height:1.8;padding:5px 18px}.brand{font-size:1rem}.authbox .btn{font-size:.75rem;padding:9px 10px}.bar{gap:8px}nav.tabs{padding:0 14px 10px}nav.tabs button{padding:10px 13px;font-size:.8rem}.catalog-copy{padding:28px 23px}.catalog-copy h1{font-size:2.8rem}.catalog-copy>p:not(.catalog-kicker){font-size:.85rem}.hero-disciplines{gap:13px}.catalog-kicker{font-size:.58rem}.catalog-wall{grid-template-columns:1fr}.gallery-toolbar .filters{gap:6px}.fchip{padding:7px 11px;font-size:.73rem;min-height:42px}.gallery-toolbar h2{font-size:1.35rem}.learning-emblem{display:none}.learning-hero{padding:24px}.learning-hero p:not(.catalog-kicker){font-size:.83rem}.homework-tab{padding:10px 12px;gap:8px;font-size:.78rem}.homework-tabs{gap:7px}.submission-form{padding:18px}.modal .top{padding:13px 16px}.assignment-row{flex-wrap:wrap}.p5-viewer-stage .p5-runner-host{height:55dvh}.p5-viewer-meta{padding:15px 18px}.site-footer{padding-left:18px;padding-right:18px}.prow{flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}.art,.cover-img,.btn{transition:none!important}.art:hover,.art:hover .cover-img{transform:none}}