:root{--color-bg: #F4F4F4;--color-bg-dark: #1C1C1E;--color-surface: #FFFFFF;--color-surface-dark: #2C2C2E;--color-text: #1A1A1A;--color-text-muted: #4A4A4A;--color-text-inverse: #F0F0F0;--color-primary: #D95A2B;--color-primary-hover: #C04D23;--color-primary-active: #A8421D;--color-primary-text: #FFFFFF;--color-success: #2D8659;--color-success-hover: #24714A;--color-success-active: #1C5D3D;--color-success-text: #FFFFFF;--color-info: #2B7BC0;--color-info-hover: #2468A3;--color-info-active: #1D5687;--color-info-text: #FFFFFF;--color-reward: #E8A817;--color-reward-glow: #F5C842;--color-error: #C0392B;--color-error-hover: #A33224;--color-error-text: #FFFFFF;--color-card: #FFFBF5;--color-card-dark: #3A3632;--color-orp: #D95A2B;--color-orp-bg: rgba(217, 90, 43, .12);--color-focus: #2B7BC0;--color-focus-offset: 3px;--font-primary: "Nunito", "Varela Round", system-ui, -apple-system, sans-serif;--font-dyslexia: "OpenDyslexic", "Atkinson Hyperlegible", sans-serif;--font-mono: "JetBrains Mono", 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none}[data-contrast=high][data-theme=dark]{--color-bg: #000000;--color-surface: #000000;--color-text: #FFFFFF;--color-text-muted: #FFFFFF;--color-card: #1A1A1A;--color-primary: #FF7A47;--color-success: #4ADE80;--color-info: #60A5FA;--color-orp: #FF7A47;--color-focus: #FFFFFF}[data-font=dyslexia]{--font-active: var(--font-dyslexia);--tracking-normal: .04em;--tracking-wide: .06em;--tracking-phoneme: .1em;--leading-normal: 1.7;--leading-loose: 2}@media (prefers-reduced-motion: reduce){:root{--duration-fast: 0ms;--duration-normal: 0ms;--duration-slow: 0ms;--duration-sparkle: 0ms}}@font-face{font-family:OpenDyslexic;src:url(/fonts/OpenDyslexic-Regular.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:OpenDyslexic;src:url(/fonts/OpenDyslexic-Bold.woff2) format("woff2");font-weight:700;font-style:normal;font-display:swap}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:100%;-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-active);font-size:var(--text-base);font-weight:var(--weight-medium);line-height:var(--leading-normal);letter-spacing:var(--tracking-normal);color:var(--color-text);background-color:var(--color-bg);overflow-x:hidden;min-height:100vh;min-height:100dvh}h1,h2,h3,h4{font-weight:var(--weight-bold);line-height:var(--leading-tight)}h1{font-size:var(--text-2xl)}h2{font-size:var(--text-xl)}h3{font-size:var(--text-lg)}h4{font-size:var(--text-base)}p{max-width:60ch}a{color:var(--color-info);text-decoration-thickness:2px;text-underline-offset:3px}a:hover{color:var(--color-info-hover)}:focus-visible{outline:3px solid var(--color-focus);outline-offset:var(--color-focus-offset);border-radius:var(--radius-sm)}:focus:not(:focus-visible){outline:none}img,svg,video{display:block;max-width:100%;height:auto}button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;-webkit-tap-highlight-color:transparent}::selection{background-color:var(--color-orp-bg);color:var(--color-text)}#app{display:flex;flex-direction:column;align-items:center;min-height:100vh;min-height:100dvh;padding:var(--space-4)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);clip-path:inset(50%);white-space:nowrap;border:0}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}[data-contrast=high] .card,[data-contrast=high] .btn{border:2px solid var(--color-text)}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-text-muted);border-radius:var(--radius-full)}.world-route{min-height:100vh;background:var(--color-bg);color:var(--color-text);font-family:var(--font-active);padding:var(--space-5) var(--space-4) var(--space-8);display:flex;flex-direction:column;align-items:center;gap:var(--space-5)}.world-route__header{width:100%;max-width:1100px;display:flex;align-items:center;justify-content:space-between;gap:var(--space-4)}.world-route__title{font-size:var(--text-xl);font-weight:var(--weight-extrabold);letter-spacing:var(--tracking-wide);margin:0}.world-route__avatar-badge{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-4);background:var(--color-surface);border-radius:var(--radius-full);box-shadow:var(--shadow-sm)}.world-route__mastery{font-size:var(--text-sm);font-weight:var(--weight-semibold);color:var(--color-text-muted)}.world-route__hint{font-size:var(--text-sm);color:var(--color-text-muted);text-align:center;max-width:60ch;margin:0}.world-route__loading{padding:var(--space-8);text-align:center;color:var(--color-text-muted)}.learn-landing__button-secondary{margin-top:var(--space-4)}.drill{position:fixed;inset:0;width:100vw;height:100vh;height:100dvh;display:flex;align-items:center;justify-content:center;cursor:pointer;user-select:none;-webkit-tap-highlight-color:transparent;overflow:hidden;transition:background-color 80ms var(--ease-out)}.drill:focus-visible{outline:none}.drill--masked{background-color:var(--color-bg-dark);color:var(--color-text-inverse)}.drill--flashing{background-color:var(--color-bg);color:var(--color-text)}.drill__stage{width:100%;display:flex;align-items:center;justify-content:center;pointer-events:none}.drill__ready{display:flex;flex-direction:column;align-items:center;gap:var(--space-3);pointer-events:none}.drill__ready-title{font-size:clamp(3rem,8vw,6rem);font-weight:var(--weight-extrabold);letter-spacing:var(--tracking-wide);color:var(--color-text-muted);opacity:.55}.drill__ready-prompt{font-size:var(--text-lg);color:var(--color-text-muted);opacity:.8;animation:drill-pulse 2.2s ease-in-out infinite}@keyframes drill-pulse{0%,to{opacity:.5}50%{opacity:1}}@media (prefers-reduced-motion: reduce){.drill__ready-prompt{animation:none;opacity:.8}}.drill__word{font-size:clamp(4rem,18vw,14rem);font-weight:var(--weight-extrabold);letter-spacing:var(--tracking-phoneme);line-height:1;color:var(--color-text);text-align:center;pointer-events:none;transform:translate(calc(var(--drill-ox, 0) * clamp(0px,35vw,280px)),calc(var(--drill-oy, 0) * clamp(0px,30vh,220px)));transition:transform 0ms}@media (prefers-reduced-motion: reduce){.drill__word{transition:none}}.drill__word-orp{color:var(--color-orp);background-color:var(--color-orp-bg);padding:0 .05em;border-radius:var(--radius-sm)}.drill__corner{position:absolute;top:var(--space-4);right:var(--space-4);display:flex;gap:var(--space-2);z-index:10}.drill__corner-btn{padding:var(--space-2) var(--space-3);min-height:var(--touch-min);min-width:var(--touch-min);background-color:transparent;color:currentColor;border:1.5px solid currentColor;border-radius:var(--radius-full);font-size:var(--text-xs);font-weight:var(--weight-semibold);cursor:pointer;opacity:.6;transition:opacity var(--duration-fast) var(--ease-out),background-color var(--duration-fast) var(--ease-out)}.drill__corner-btn:hover{opacity:1}.drill__corner-btn:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px;opacity:1}.drill__zone-label{position:absolute;top:var(--space-4);left:var(--space-4);display:flex;align-items:baseline;gap:var(--space-2);padding:var(--space-2) var(--space-3);background-color:transparent;border:1.5px solid currentColor;border-radius:var(--radius-full);color:currentColor;opacity:.6;font-size:var(--text-xs);z-index:10;pointer-events:none}.drill__zone-label-prefix{font-weight:var(--weight-medium);opacity:.7}.drill__zone-label-name{font-weight:var(--weight-bold)}.drill__corner-btn--boss{background-color:var(--color-primary);color:var(--color-primary-text);border-color:var(--color-primary);opacity:.9}.drill__corner-btn--boss:hover{background-color:var(--color-primary-hover);opacity:1}.drill__footer{position:absolute;bottom:var(--space-4);left:0;right:0;display:flex;justify-content:center;pointer-events:none;z-index:10}.drill__footer-label{font-size:var(--text-xs);color:currentColor;opacity:.45;font-variant-numeric:tabular-nums}.boss-judge{display:flex;flex-direction:column;align-items:center;gap:var(--space-4);padding:var(--space-6);max-width:32rem;text-align:center;color:currentColor}.boss-judge__title{font-size:clamp(2rem,6vw,3.5rem);font-weight:var(--weight-extrabold);margin:0}.boss-judge__body{font-size:var(--text-base);line-height:var(--leading-normal);margin:0;opacity:.85}.boss-judge__body--pass{color:var(--color-success);font-weight:var(--weight-bold);opacity:1}.boss-judge__actions{display:flex;gap:var(--space-3);flex-wrap:wrap;justify-content:center;margin-top:var(--space-2)}.drill__empty{display:flex;flex-direction:column;align-items:center;gap:var(--space-4);color:var(--color-text-inverse);padding:var(--space-6);text-align:center}.drill__empty h1{font-size:var(--text-xl);margin:0}.drill__link-btn{padding:var(--space-3) var(--space-5);min-height:var(--touch-target);background-color:var(--color-primary);color:var(--color-primary-text);border:none;border-radius:var(--radius-full);font-weight:var(--weight-bold);font-size:var(--text-base);cursor:pointer}.beat-session{position:fixed;inset:0;width:100vw;height:100vh;height:100dvh;display:flex;flex-direction:column;background-color:var(--color-bg);color:var(--color-text);font-family:var(--font-active);overflow:hidden;z-index:1}.beat-hud{display:flex;justify-content:space-between;align-items:flex-start;padding:var(--space-4) var(--space-6);font-weight:var(--weight-bold);font-size:var(--text-lg);pointer-events:none}.beat-hud__score,.beat-hud__combo{background-color:var(--color-card);border-radius:var(--radius-lg);padding:var(--space-2) var(--space-4);box-shadow:var(--shadow-sm);min-width:4.5rem;text-align:center}.beat-hud__combo--hot{color:var(--color-primary)}.beat-hud__label{display:block;font-size:var(--text-xs);font-weight:var(--weight-semibold);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:var(--tracking-wide)}.beat-arena{flex:1;display:flex;align-items:center;justify-content:center;position:relative;cursor:pointer;user-select:none;-webkit-tap-highlight-color:transparent;background-color:var(--color-bg);transition:background-color .22s var(--ease-out)}.beat-arena--break-flash{background-color:var(--color-orp-bg)}.beat-arena--miss-flash{background-color:var(--color-surface)}.beat-arena__inner{display:flex;flex-direction:column;align-items:center;gap:var(--space-5);pointer-events:none}.beat-arena__hint{font-size:var(--text-base);font-weight:var(--weight-semibold);color:var(--color-text-muted);max-width:22rem;text-align:center}.beat-arena__hint--break{color:var(--color-primary);font-weight:var(--weight-bold)}.beat-footer{padding:var(--space-3) var(--space-6) var(--space-6);text-align:center;font-size:var(--text-sm);color:var(--color-text-muted)}.beat-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-5);padding:var(--space-8);background-color:var(--color-bg);text-align:center;z-index:var(--z-overlay, 20)}.beat-overlay__title{font-size:var(--text-3xl);font-weight:var(--weight-extrabold);margin:0}.beat-overlay__body{font-size:var(--text-lg);color:var(--color-text-muted);max-width:28rem;margin:0}.beat-overlay__actions{display:flex;gap:var(--space-4);flex-wrap:wrap;justify-content:center}.beat-summary__result{font-size:var(--text-xl);font-weight:var(--weight-bold)}.beat-summary__result--pass{color:var(--color-primary)}.beat-summary__result--fail{color:var(--color-text-muted)}.beat-summary__stats{display:flex;gap:var(--space-6);margin:var(--space-2) 0}.beat-summary__stat{display:flex;flex-direction:column;align-items:center;min-width:5.5rem}.beat-summary__stat-value{font-size:var(--text-2xl);font-weight:var(--weight-extrabold)}.beat-summary__stat-label{font-size:var(--text-xs);text-transform:uppercase;color:var(--color-text-muted);letter-spacing:var(--tracking-wide)}@media (prefers-reduced-motion: 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solid var(--color-text-muted);border-radius:var(--radius-md);resize:vertical;box-sizing:border-box}.teacher-panel__textarea:focus-visible{border-color:var(--color-focus);outline:3px solid var(--color-focus);outline-offset:2px}.teacher-panel__meta{font-size:var(--text-sm);color:var(--color-text-muted);margin:0}.teacher-panel__presets{display:flex;flex-wrap:wrap;gap:var(--space-2)}.teacher-panel__preset-btn{padding:var(--space-2) var(--space-4);min-height:var(--touch-min);font-size:var(--text-sm);font-weight:var(--weight-semibold);color:var(--color-text);background-color:var(--color-bg);border:2px solid var(--color-text-muted);border-radius:var(--radius-full);cursor:pointer;transition:transform var(--duration-fast) var(--ease-out),background-color var(--duration-fast) var(--ease-out)}.teacher-panel__preset-btn:hover{background-color:var(--color-surface);border-color:var(--color-primary)}.teacher-panel__preset-btn:active{transform:scale(.96)}.teacher-panel__preset-btn:focus-visible{outline:3px solid var(--color-focus);outline-offset:2px}.teacher-panel__slider{width:100%;height:var(--touch-min);accent-color:var(--color-primary);cursor:pointer}.teacher-panel__slider-legend{display:flex;justify-content:space-between;font-size:var(--text-xs);color:var(--color-text-muted)}.teacher-panel__toggle{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-2) 0;cursor:pointer;font-size:var(--text-sm);line-height:var(--leading-normal)}.teacher-panel__toggle input[type=checkbox]{width:24px;height:24px;margin-top:2px;accent-color:var(--color-primary);cursor:pointer;flex-shrink:0}.teacher-panel__toggle-detail{display:block;font-size:var(--text-xs);color:var(--color-text-muted);margin-top:2px}.teacher-panel__actions{display:flex;gap:var(--space-3);flex-wrap:wrap;align-items:center;padding:var(--space-3) 0 var(--space-6)}