:root{--bg-page:#fafafa;--ink:#1a1a1a;--ink-soft:#6b7280;--card:#fff;--card-border:#e5e7eb;--accent:#059669;--accent-dark:#047857;--xp:#059669;--coin:#f5b301;--success:#22c55e;--danger:#ef4444;--radius:10px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:DM Sans,ui-sans-serif,system-ui,sans-serif}*{box-sizing:border-box}body{background:var(--bg-page);min-height:100vh;color:var(--ink);letter-spacing:-.025em;margin:0}h1,h2,h3,.title-font{font-family:DM Sans,ui-sans-serif,system-ui,sans-serif;font-weight:700}button{cursor:pointer;font-family:inherit}#root{flex-direction:column;min-height:100vh;display:flex}.login-screen{flex:1;justify-content:center;align-items:center;padding:24px;display:flex}.login-card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);text-align:center;width:100%;max-width:380px;padding:32px 28px;box-shadow:0 20px 40px -20px #0003}.login-emoji{font-size:56px}.login-card h1{margin:8px 0 4px;font-size:28px}.login-card p{color:var(--ink-soft);margin-bottom:20px;font-size:14px}.login-card form{flex-direction:column;gap:10px;display:flex}.login-card input{border:2px solid var(--card-border);text-align:center;border-radius:12px;padding:12px 14px;font-size:16px}.login-card input:focus{border-color:var(--accent);outline:none}.error-text{color:var(--danger);margin-top:12px;font-size:14px}.btn-primary,.btn-secondary,.btn-danger,.btn-success{white-space:nowrap;border:none;border-radius:12px;padding:10px 16px;font-size:14px;font-weight:700;transition:transform .1s}.btn-primary:active:not(:disabled),.btn-secondary:active:not(:disabled),.btn-danger:active:not(:disabled),.btn-success:active:not(:disabled){transform:scale(.94)}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-dark)}.btn-secondary{color:var(--ink);background:#eef2f7;align-items:center;text-decoration:none;display:inline-flex}.btn-secondary:hover:not(:disabled){background:#e2e8f0}.btn-danger{color:#b91c1c;background:#fee2e2}.btn-success{color:#15803d;background:#dcfce7}button:disabled{opacity:.5;cursor:not-allowed}.app-shell{flex:1;min-height:100vh;display:flex}.sidebar{background:var(--card);border-right:1px solid var(--card-border);flex-direction:column;flex-shrink:0;align-items:center;gap:20px;width:68px;padding:16px 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24px;display:flex;position:sticky;top:0}.topbar-identity{align-items:center;gap:10px;display:flex}.avatar-emoji{font-size:32px}.pet-emoji{font-size:20px}.pseudo{font-weight:800}.streak{color:var(--ink-soft);font-size:12px}.topbar-stats{gap:12px;margin-left:auto;display:flex}.stat{color:var(--ink);font-size:14px;font-weight:700}.stat-unit{color:var(--ink-soft);font-size:12px;font-weight:500}.app-main{flex:1;width:100%;max-width:960px;margin:0 auto;padding:24px 20px 60px}.app-main--wide{max-width:none;padding-left:32px;padding-right:32px}.empty-state{color:var(--ink-soft);text-align:center;margin-top:40px}.islands-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px;display:grid}.island-card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);text-align:center;padding:22px 18px;transition:transform .15s}.island-card:hover{transform:translateY(-4px)}.island-card h3{margin:4px 0 12px;font-size:16px}.island-progress-bar{background:#eef2f7;border-radius:999px;height:8px;overflow:hidden}.island-progress-fill{background:linear-gradient(90deg, var(--accent), var(--xp));height:100%;transition:width .6s}.island-progress-label{color:var(--ink-soft);margin-top:6px;font-size:12px}.back-link{color:var(--ink-soft);background:0 0;border:none;margin-bottom:12px;padding:0;font-weight:700}.stations-list{flex-direction:column;gap:12px;padding:0;list-style:none;display:flex}.station-card{background:var(--card);border:1px solid var(--card-border);border-radius:16px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;display:flex}.station-title{font-weight:800}.station-meta{color:var(--ink-soft);margin-top:4px;font-size:13px}.station-actions{flex-wrap:wrap;gap:8px;display:flex}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:50;background:#0f172a73;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-card{background:var(--card);border-radius:var(--radius);text-align:center;width:100%;max-width:480px;padding:28px;position:relative}.modal-close{color:var(--ink-soft);background:0 0;border:none;font-size:22px;position:absolute;top:12px;right:16px}.quiz-progress{color:var(--ink-soft);margin-bottom:16px;font-size:13px}.flashcard-question{min-height:48px;margin-bottom:20px;font-size:18px;font-weight:700}.flashcard-answer{text-align:left;background:#f8fafc;border-radius:12px;margin-bottom:20px;padding:16px;font-size:15px;line-height:1.5}.quiz-buttons{justify-content:center;gap:10px;display:flex}.quiz-score{margin:16px 0 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var(--card-border);border-radius:var(--radius);padding:18px}.leaderboard-list ol{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.leaderboard-list li{border-radius:10px;align-items:center;gap:10px;padding:8px 10px;display:flex}.leaderboard-list li.me{background:#ecfdf5}.leaderboard-list .rank{color:var(--ink-soft);width:28px;font-weight:800}.leaderboard-list .pseudo{flex:1;font-weight:700}.leaderboard-list .xp{color:var(--xp);font-weight:800}.toast{background:var(--ink);color:#fff;z-index:60;border-radius:999px;padding:12px 20px;font-weight:700;position:fixed;bottom:24px;left:50%;transform:translate(-50%);box-shadow:0 10px 30px -10px #0006}.island-scene{justify-content:center;align-items:center;height:90px;margin-bottom:8px;display:flex;position:relative}.island-scene-base{font-size:48px;animation:3s ease-in-out infinite island-float}.island-scene-image{object-fit:contain;width:auto;max-width:100%;height:100%;animation:3s ease-in-out infinite island-float}.island-scene--illustrated.island-scene--normal{height:150px}.island-scene--hero{width:100%;max-width:560px;height:auto;margin-bottom:0}.island-scene--illustrated.island-scene--hero{max-width:620px}.island-scene--hero .island-scene-image{width:100%;height:auto}.island-scene--hero .island-scene-base{font-size:160px}.island-scene--small{height:56px}.island-scene--small .island-scene-base{font-size:34px}.island-scene--small .island-scene-deco{font-size:13px}.island-scene-deco{font-size:18px;animation:.4s ease-out backwards deco-pop,2.6s ease-in-out infinite deco-float;position:absolute}.island-sparkle{font-size:15px;animation:1.4s ease-in-out infinite sparkle-twinkle;position:absolute}.island-sparkle--1{top:-4px;left:22%}.island-sparkle--2{animation-delay:.7s;top:8px;right:12%}.island-scene.is-complete .island-scene-base{filter:drop-shadow(0 0 6px #f5b30199)}@keyframes island-float{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}@keyframes deco-float{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}@keyframes deco-pop{0%{opacity:0;transform:scale(0)}to{opacity:1;transform:scale(1)}}@keyframes sparkle-twinkle{0%,to{opacity:.25;transform:scale(.8)}50%{opacity:1;transform:scale(1.15)}}.island-view-header{align-items:center;gap:10px;margin-bottom:4px;display:flex}.island-view-header h2{margin:0}.toast{animation:.25s ease-out toast-in}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,14px)scale(.92)}to{opacity:1;transform:translate(-50%)scale(1)}}.sound-toggle{background:0 0;border:none;border-radius:10px;padding:6px 8px;font-size:16px}.sound-toggle:hover{background:#eef2f7}.flip-card{perspective:1200px;cursor:pointer;margin-bottom:20px}.flip-card-inner{width:100%;min-height:170px;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,.2,.2,1);position:relative}.flip-card-inner.flipped{transform:rotateY(180deg)}.flip-card-front,.flip-card-back{backface-visibility:hidden;text-align:center;border-radius:14px;flex-direction:column;justify-content:center;align-items:center;padding:18px;display:flex;position:absolute;inset:0}.flip-card-front{border:1px solid var(--card-border);background:#fff7ec}.flip-card-back{border:1px solid var(--card-border);text-align:left;background:#f8fafc;justify-content:center;align-items:stretch;transform:rotateY(180deg)}.flip-hint{color:var(--ink-soft);margin-top:14px;font-size:12px}.flip-card .flashcard-question{margin-bottom:0}.flip-card .flashcard-answer{background:0 0;margin-bottom:0;padding:0}.quiz-score-emoji{margin:8px 0;font-size:40px}.dashboard-grid{grid-template-columns:1fr 1.9fr 1fr;align-items:start;gap:40px;display:grid}.dash-col{flex-direction:column;gap:20px;display:flex}.card{background:var(--card);border:1px solid var(--card-border);border-radius:14px;padding:20px;box-shadow:0 1px 2px #0000000a}.card h3{color:var(--ink-soft);margin:0 0 14px;font-size:15px}.dashboard-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;display:flex}.dashboard-header h2{margin:0;font-size:24px}.dashboard-header-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.dashboard-header-actions select{border:1px solid var(--card-border);border-radius:10px;padding:9px 12px;font-family:inherit}.hero-card{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding-top:24px;display:flex}.hero-name{margin-top:14px;font-size:16px;font-weight:700}.hero-badge-wrap{z-index:1;justify-content:center;margin-top:-14px;display:flex;position:relative}.hero-badge{background:var(--ink);border-radius:6px;justify-content:center;align-items:center;width:28px;height:28px;display:flex;transform:rotate(45deg)}.hero-badge span{color:#fff;font-size:13px;font-weight:700;transform:rotate(-45deg)}.hero-fraction{color:var(--ink-soft);margin-top:14px;font-size:14px}.timer-card{flex-direction:column;align-items:center;gap:4px;display:flex}.arc-gauge-wrap{width:200px;position:relative}.arc-gauge{width:100%;display:block}.arc-time{color:var(--ink-soft);font-size:12px;font-weight:600;position:absolute;top:0;left:50%;transform:translate(-50%)}.arc-content{text-align:center;position:absolute;top:52px;left:0;right:0}.timer-value{font-size:26px;font-weight:800}.timer-label{color:var(--ink-soft);font-size:12px}.timer-goal-bar{width:100%;margin-top:10px}.timer-goal-bar-track{background:#e5e7eb;border-radius:999px;height:6px;overflow:hidden}.timer-goal-bar-fill{background:var(--accent);height:100%;transition:width .6s}.timer-goal-bar-label{color:var(--ink-soft);text-align:center;margin-top:8px;font-size:12px}.timer-running-label{font-weight:700}.card-header-row{justify-content:space-between;align-items:baseline;margin-bottom:14px;display:flex}.card-header-row h3{margin:0}.card-header-count{color:var(--ink-soft);font-size:12px;font-weight:600}.calendar-weekday-row,.calendar-row{justify-content:space-between;gap:4px;display:flex}.calendar-weekday-row{margin-bottom:4px}.calendar-weekday-label{text-align:center;color:var(--ink-soft);flex:1;font-size:10px;font-weight:600}.calendar-day{text-align:center;border-radius:8px;flex:1;padding:6px 2px}.calendar-day-num{color:var(--ink-soft);font-size:12px}.calendar-day-value{margin-top:2px;font-size:11px;font-weight:700}.sessions-list{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.session-item{border-bottom:1px solid var(--card-border);justify-content:space-between;align-items:center;gap:10px;padding-bottom:10px;display:flex}.session-item:last-child{border-bottom:none;padding-bottom:0}.session-item-main{flex-direction:column;display:flex}.session-subject{font-size:14px;font-weight:700}.session-ago{color:var(--ink-soft);font-size:11px}.session-item-side{flex-direction:column;align-items:flex-end;display:flex}.session-duration{font-size:13px}.session-xp{color:var(--success);font-size:12px;font-weight:700}.streak-row{justify-content:space-between;gap:8px;display:flex}.streak-day{text-align:center}.streak-day-circle{background:#f1f5f9;border-radius:50%;justify-content:center;align-items:center;width:48px;height:48px;margin:0 auto 6px;font-size:10px;font-weight:700;display:flex}.streak-day-label{color:var(--ink-soft);font-size:11px}.courses-chart{height:140px;padding-bottom:18px;position:relative}.courses-chart-svg{width:100%;height:100%;overflow:visible}.courses-chart-hit{width:1px;position:absolute;top:0;bottom:18px;transform:translate(-50%)}.courses-chart-labels{justify-content:space-between;display:flex;position:absolute;bottom:0;left:0;right:0}.courses-chart-labels span{color:var(--ink-soft);text-align:center;flex:1;font-size:10px}.bar-tooltip{background:var(--ink);color:#fff;white-space:nowrap;pointer-events:none;z-index:2;border-radius:6px;margin-bottom:6px;padding:3px 8px;font-size:11px;font-weight:600;position:absolute;bottom:100%;left:50%;transform:translate(-50%)}.bar-tooltip:after{content:"";border:4px solid #0000;border-top-color:var(--ink);position:absolute;top:100%;left:50%;transform:translate(-50%)}.courses-chart-tooltip{bottom:auto;transform:translate(-50%,calc(-100% - 10px))}.course-bar-track{background:#eef2f7;border-radius:8px;flex:1;align-items:flex-end;width:28px;display:flex;overflow:hidden}.course-bar-fill{border-radius:8px 8px 0 0;width:100%;transition:height .6s}.course-bar-label{color:var(--ink-soft);text-align:center;margin-top:8px;font-size:10px}.study-days-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.study-days-label{color:var(--ink-soft);font-size:11px}.study-days-value{margin-top:2px;font-size:18px;font-weight:800}.study-days-goal-bar{background:#e5e7eb;border-radius:999px;height:4px;margin-top:8px;overflow:hidden}.study-days-goal-fill{background:var(--accent);height:100%}.study-days-goal-label{color:var(--ink-soft);text-align:right;margin-top:4px;font-size:10px}@media (width<=900px){.dashboard-grid{grid-template-columns:1fr;gap:20px}.hero-card{order:-1;padding-top:0}.island-scene--hero{max-width:340px}.island-scene--illustrated.island-scene--hero{max-width:380px}}.confetti-layer{pointer-events:none;z-index:70;position:fixed;inset:0;overflow:hidden}.confetti-piece{border-radius:2px;width:8px;height:14px;animation:linear forwards confetti-fall;position:absolute;top:-12px}@keyframes confetti-fall{to{opacity:.3;top:100vh}}@media (width<=480px){.topbar{justify-content:center}.topbar-stats{margin-left:0}.station-card{flex-direction:column;align-items:flex-start}}@media (prefers-reduced-motion:reduce){.island-scene-base,.island-scene-image,.island-scene-deco,.island-sparkle,.confetti-piece{animation:none!important}.flip-card-inner{transition:none!important}}