@font-face{font-family:EcoUI;src:local('Arial');font-display:swap}*{box-sizing:border-box}html{color-scheme:dark;scroll-behavior:smooth}body{margin:0;background:#0b1422;color:#eff6ff;font-family:EcoUI,'Apple SD Gothic Neo','Malgun Gothic',sans-serif;line-height:1.55;--accent:#65f1d0;--second:#74b8ff}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,select,input{touch-action:manipulation}button{color:inherit;border:1px solid #46556b;background:#1e2a3e;border-radius:12px;padding:10px 16px;cursor:pointer;min-height:44px}button:hover{border-color:var(--accent);background:#263950}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid 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h1{font-size:clamp(36px,5vw,66px);line-height:1.14;letter-spacing:-2px;margin:18px 0}.hero h1 em{font-style:normal;color:var(--accent)}.hero p{max-width:620px;color:#b8c8dc;font-size:18px}.hero-visual{position:relative;display:grid;place-items:center;min-height:260px}.orb{width:220px;height:220px;border:1px solid var(--accent);border-radius:50%;box-shadow:inset -25px -20px 70px #102031,0 0 80px #273e5450;background:radial-gradient(circle at 32% 28%,var(--second),#142e42 70%);transform:rotate(-20deg);display:grid;place-items:center;font-size:100px;color:var(--accent)}.orbit-line{position:absolute;width:320px;height:90px;border:1px solid var(--accent);border-radius:50%;transform:rotate(-25deg)}.orbit-line:after{content:'';position:absolute;right:22px;top:0;width:18px;height:18px;background:var(--accent);border-radius:50%;box-shadow:0 0 25px var(--accent)}.hero-count{position:absolute;bottom:5px;font-size:10px;letter-spacing:4px;color:#bccddd}.world-nav{display:flex;gap:8px;overflow:auto;margin:25px 0 35px;padding:3px}.world-nav a{border:1px solid #3c4a61;padding:9px 15px;white-space:nowrap;border-radius:30px;font-size:13px}.world-nav a[aria-current]{background:var(--accent);border-color:var(--accent);color:#0b1422;font-weight:800}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}.section-head h2{font-size:24px}.section-head p{color:#a0b2ca;font-size:13px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card{overflow:hidden;border:1px solid #35445c;border-radius:20px;background:linear-gradient(145deg,#18283a,#111c2d);position:relative}.card-art{height:185px;overflow:hidden;background:linear-gradient(145deg,#18263d,#0b1629);position:relative}.card-art img{width:100%;height:100%;object-fit:cover;display:block}.card-body{padding:24px}.serial{font-size:11px;letter-spacing:1.7px;color:var(--accent)}.card h3{font-size:23px;letter-spacing:-.7px;margin:9px 0}.card p{color:#b4c3d6;font-size:14px;min-height:44px}.card button{width:100%;display:flex;justify-content:space-between;align-items:center}.tag{display:inline-flex;border:1px solid #41546e;border-radius:30px;font-size:11px;padding:3px 9px;color:#dbe7f7;margin:0 4px 8px 0}.home-note{border-top:1px solid #34435a;margin-top:35px;padding-top:22px;display:flex;gap:22px;justify-content:space-between;color:#b6c7dc}.home-note b{color:#eff7ff}.play-head{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:15px}.play-head h1{font-size:24px;line-height:1.2;margin:3px 0}.play-head .eyebrow{font-size:10px}.head-buttons{display:flex;gap:7px}.game-shell{border:1px solid #3e5571;border-radius:22px;overflow:hidden;background:#111f32}.brief{display:grid;grid-template-columns:1fr auto;align-items:center;gap:14px;padding:18px 22px;border-bottom:1px solid #354860;background:linear-gradient(115deg,#203248,#132437)}.brief .label{font-size:10px;letter-spacing:2px;color:var(--accent)}.brief h2{font-size:23px;line-height:1.35;margin:2px 0}.brief p{font-size:14px;color:#c2d2e6;margin:4px 0}.score{display:flex;gap:16px;text-align:right;font-variant-numeric:tabular-nums}.score b{display:block;font-size:23px;color:var(--accent)}.score small{font-size:10px;color:#b7c8dd}.stage{position:relative;background:#0d1b2c;max-width:940px;margin:auto;isolation:isolate}.stage canvas{display:block;width:100%;aspect-ratio:3/2;touch-action:none;outline:none}.stage-overlay{position:absolute;inset:0;background:#0b1422de;display:flex;align-items:center;justify-content:center;padding:24px;z-index:3;text-align:center;backdrop-filter:blur(5px)}.overlay-card{max-width:590px}.overlay-card 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#63809b;background:radial-gradient(circle,#28445c,#15263a);touch-action:none;position:relative;user-select:none;display:grid;place-items:center}.joystick:before{content:'↕  ↔';color:#b4c9df;font-size:16px}.joystick .knob{position:absolute;width:38px;height:38px;border-radius:50%;background:var(--accent);opacity:.8;pointer-events:none}.action{width:96px;height:70px;border-radius:22px;color:#0b1422;background:var(--accent);font-weight:900;font-size:16px;touch-action:none;user-select:none}.controls-copy{flex:1;color:#aebfd4;font-size:12px}.controls-copy b{display:block;font-size:14px;color:#f1f6ff}.under-game{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}.knowledge,.help-panel{padding:20px;background:#142236;border:1px solid #35475e;border-radius:16px}.knowledge h3,.help-panel h3{font-size:15px;margin:0 0 9px}.knowledge .pair{font-size:23px;color:var(--accent)}.knowledge p,.help-panel p{font-size:14px;color:#c0cede;margin:6px 0}.typing{display:flex;gap:8px;margin-top:8px}.typing input{min-width:0;width:100%;padding:10px;border-radius:10px;border:1px solid #576f8b;background:#0c192b;color:white}.result{border:1px solid #405873;border-radius:24px;padding:32px;background:#14253a}.result h1{font-size:40px;margin:5px 0}.result .big-score{font-size:64px;color:var(--accent);font-weight:900}.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:25px 0}.review-card{background:#0e1b2f;border:1px solid #354a64;padding:18px;border-radius:14px}.review-card strong{display:block;color:var(--accent);font-size:21px}.review-card p{font-size:13px;color:#bbcde3}footer{border-top:1px solid #2d3e56;padding:30px;text-align:center;font-size:12px;color:#9eafc6}footer b{letter-spacing:3px;color:#c5d5e7}footer button{font-size:12px;padding:2px 8px;min-height:30px}dialog{max-width:480px;width:calc(100% - 30px);border:1px solid #55708d;border-radius:20px;background:#14243b;color:#e9f3ff;padding:24px;max-height:85dvh}dialog::backdrop{background:#050b15cc}dialog label{display:block;margin:16px 0}dialog input[type=range]{display:block;width:100%}dialog input[type=checkbox]{accent-color:var(--accent);width:19px;height:19px;vertical-align:middle;margin-right:8px}dialog select{border:1px solid #61738a;border-radius:8px;padding:8px;background:#0c1b2d;color:white}dialog fieldset{border:1px solid #465d78;border-radius:10px}dialog p{font-size:13px;color:#b6c9e0}.close{float:right}.sr{position:absolute;width:1px;height:1px;clip:rect(0,0,0,0);overflow:hidden}button:disabled{opacity:.45;cursor:default}[hidden]{display:none!important}@media(min-width:1100px){body.playing main{max-width:1180px}.game-shell .stage{max-width:810px}}@media(max-width:800px){header{padding:16px 20px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{grid-template-columns:1fr;padding-top:25px}.hero-visual{display:none}.under-game{grid-template-columns:1fr}.review-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:540px){header{padding:12px;gap:8px}.brand{font-size:22px}.brand small{font-size:8px;letter-spacing:1px}header nav{gap:5px}header nav button{padding:7px 9px;font-size:12px}header nav a{display:none}main{padding:8px 12px 40px}.hero h1{font-size:39px}.hero p{font-size:15px}.cards{grid-template-columns:1fr}.card{display:grid;grid-template-columns:116px 1fr;border-radius:16px}.card-art{height:100%;min-height:220px}.card-art img{object-fit:cover}.card-body{padding:17px}.card h3{font-size:20px}.card p{font-size:13px}.card button{font-size:13px;padding:9px}.card .serial{font-size:9px}.section-head p{display:none}.home-note{display:block;font-size:14px}.play-head{align-items:flex-start;gap:8px}.play-head h1{font-size:20px}.head-buttons button{font-size:11px;padding:7px 10px}.brief{padding:12px;gap:8px;grid-template-columns:1fr}.brief h2{font-size:20px}.brief p{font-size:12px}.score{justify-content:space-between;text-align:left;gap:10px}.score b{display:inline;font-size:16px;margin-left:4px}.score small{font-size:11px}.game-shell{border-radius:16px}.stage canvas{aspect-ratio:3/2}.play-status{padding:9px 12px;font-size:12px;min-height:54px}.controls{padding:12px;gap:12px}.joystick{width:78px;height:78px}.joystick .knob{width:32px;height:32px}.action{width:80px;height:66px}.controls-copy{font-size:10px;line-height:1.4}.controls-copy b{font-size:12px}.overlay-card p{font-size:13px}.overlay-card h2{font-size:24px}.stage-overlay{padding:13px}.lesson-preview{gap:5px;margin:10px 0}.lesson-preview span{font-size:11px;padding:6px 9px}.lesson-preview b{font-size:15px}.overlay-actions button{font-size:12px;padding:8px 12px}.result{padding:22px}.result h1{font-size:30px}.result .big-score{font-size:48px}.review-grid{grid-template-columns:1fr}.knowledge,.help-panel{padding:16px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
/* The introduction has its own height so small phone screens never clip it. */
.stage:has(.intro) canvas{display:none}.stage-overlay.intro{position:relative;min-height:360px}.stage-overlay.intro .overlay-card{padding:8px 0}

.action{padding:8px;font-size:14px;word-break:keep-all}
@media(max-height:550px) and (min-width:600px){body.playing header{display:none}body.playing main{padding:8px 12px}.play-head{margin-bottom:8px}.play-head h1{font-size:18px}.play-head .eyebrow{display:none}.game-shell{display:grid;grid-template-columns:minmax(0,1fr) 100px}.brief{grid-column:1/3;padding:7px 12px}.brief .label{display:none}.brief h2{font-size:18px}.brief p{font-size:11px;margin:0}.score b{font-size:18px}.stage{width:min(100%,calc((100dvh - 150px)*1.5));max-width:none!important;align-self:center}.controls{grid-column:2;grid-row:2;flex-direction:column;justify-content:center;padding:8px;gap:10px;border-top:0}.controls-copy{display:none}.joystick{width:70px;height:70px}.action{width:76px;height:50px}.play-status{grid-column:1/3;min-height:33px;font-size:11px;padding:5px 12px}.stage-overlay.intro{min-height:220px}.intro .overlay-card h2{font-size:24px;margin:4px}.intro .overlay-card p{font-size:12px;margin:6px}.intro .lesson-preview{display:none}.under-game{margin-top:24px}}

#friendPicker{min-width:0}#friendPicker>p{font-size:14px;color:var(--muted)}.friend-choices{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-top:10px}.friend-choices button{display:grid;place-items:center;gap:4px;padding:8px 3px;min-width:0;min-height:108px}.friend-choices img{object-fit:contain;width:60px;height:60px}.friend-choices span{font-size:12px;overflow-wrap:anywhere}.friend-choices small{font-size:11px;color:var(--muted)}[data-friend][aria-pressed=true]{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);background:#294754}.friend-note{min-height:38px}.friend-choices button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}@media(max-width:480px){.friend-choices{grid-template-columns:repeat(3,minmax(0,1fr))}}

.course-picker{display:flex;gap:10px;justify-content:center;margin:12px 0}.course-picker button{min-height:46px;border:1px solid #608181;background:#173f48;color:#effffa}.course-picker button[aria-pressed="true"]{background:#d4ead1;color:#163b36;border-color:#fff2bd;box-shadow:0 0 0 2px #adcfa266}

.drift-action{touch-action:none;background:#153d50;border:2px solid #87eaff;color:#e6ffff;border-radius:22px;min-height:74px;min-width:91px;font-weight:800}.drift-action:active{background:#276777}#start:disabled{opacity:.45;cursor:wait}#raceSupport{color:#cdebd5;font-size:13px}#raceRetest{min-height:40px}@media(max-width:600px){.controls:has(.drift-action){flex-wrap:wrap;gap:9px}.controls:has(.drift-action) .controls-copy{flex-basis:100%;order:4}.drift-action{min-width:82px;min-height:65px}.controls:has(.drift-action) .action{margin-left:auto}}

.member-gate{max-width:700px;margin:auto}.member-gate img{object-fit:contain}.member-gate form{display:grid;gap:16px;max-width:420px;margin:24px auto;text-align:left}.member-gate label{display:grid;gap:8px}.member-gate input{width:100%;padding:12px;border-radius:12px;border:1px solid #86c9d0;background:#142a3c;color:white}.member-gate a{color:#91ffe4}.brief .label{line-height:1.7}