:root{--bg: #0f1216;--panel: #161b22;--panel-2: #1d242d;--text: #e6edf3;--muted: #8b949e;--accent: #7ee787;--warn: #f0883e;--contrast: #79c0ff;--wrong: #ff7b72;--border: #30363d;--gold: #ffd700}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;overflow-x:hidden}#app{max-width:720px;margin:0 auto;padding:28px 18px 80px;position:relative}.hud{display:grid;grid-template-columns:1fr 1.6fr 1fr 1fr 1fr;gap:8px;background:linear-gradient(180deg,#161b22f2,#161b22d9);border:1px solid var(--border);border-radius:12px;padding:10px 14px;margin-bottom:18px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:sticky;top:8px;z-index:100}.hud-item{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:0 4px}.hud-item.warn .hud-value{color:var(--warn);animation:warnPulse 1.6s ease-in-out infinite}.hud-label{font-size:10px;letter-spacing:.1em;color:var(--muted);font-family:SF Mono,Menlo,Consolas,monospace}.hud-value{font-size:20px;font-weight:700;font-family:SF Mono,Menlo,Consolas,monospace;color:var(--text);transition:color .25s ease,transform .25s ease}.hud-value.hot{color:#ff7b3a;text-shadow:0 0 10px rgba(255,123,58,.6)}.hud-value.hud-bump{animation:hudBump .4s ease-out}.hud-value.hud-bump-big{animation:hudBumpBig .7s ease-out}@keyframes hudBump{0%{transform:scale(1)}40%{transform:scale(1.4);color:var(--accent)}to{transform:scale(1)}}@keyframes hudBumpBig{0%{transform:scale(1)}30%{transform:scale(1.8);color:var(--gold);text-shadow:0 0 16px var(--gold)}to{transform:scale(1)}}@keyframes warnPulse{0%,to{opacity:1}50%{opacity:.6}}.hud-level-wrap{position:relative}.hud-level-bar{position:absolute;bottom:-2px;left:4px;right:4px;height:3px;background:var(--panel-2);border-radius:2px;overflow:hidden}.hud-level-fill{height:100%;background:linear-gradient(90deg,var(--contrast),var(--accent));transition:width .4s ease}.hud-level-remain{font-size:9px;color:var(--muted);margin-top:2px}.streak-banner{padding:10px 14px;border-radius:10px;margin-bottom:16px;font-size:13px;text-align:center;font-weight:600}.streak-banner.good{background:linear-gradient(90deg,#ffd7001f,#ff7b3a1f);border:1px solid rgba(255,215,0,.4);color:var(--gold);text-shadow:0 0 8px rgba(255,215,0,.3)}.streak-banner.neutral{background:var(--panel);border:1px solid var(--border);color:var(--muted)}.home-header{margin-bottom:24px}.drill-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:8px}h1{margin:0;font-size:22px;letter-spacing:.02em}h1 .sub{color:var(--muted);font-weight:400;font-size:14px;margin-left:8px}.home-header .lead{color:var(--muted);font-size:14px;line-height:1.7;margin-top:12px}.home-header .lead strong{color:var(--contrast)}.lead-sub{color:var(--muted);font-size:13px;margin-top:6px}.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:26px 22px 18px;box-shadow:0 8px 24px #00000040;position:relative;transition:box-shadow .3s ease,transform .3s ease}.revenge-banner{background:linear-gradient(90deg,#ffd70026,#ff7b3a26);border:1px solid rgba(255,215,0,.4);color:var(--gold);padding:8px 12px;border-radius:8px;font-size:13px;margin-bottom:14px;font-weight:600}.tag{display:inline-block;font-size:11px;color:var(--muted);background:var(--panel-2);padding:4px 10px;border-radius:999px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.prompt{font-size:22px;line-height:1.5;margin-bottom:22px;font-family:-apple-system,Helvetica Neue,sans-serif;min-height:1.5em}.prompt.typewriter-in{animation:fadeUp .22s ease-out both}@keyframes fadeUp{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.blank{color:var(--warn);font-weight:700;letter-spacing:.05em}.choices{display:flex;flex-direction:column;gap:10px;margin-bottom:14px}.choice{background:var(--panel-2);color:var(--text);border:1px solid var(--border);padding:14px 16px;border-radius:8px;font-size:16px;text-align:left;cursor:pointer;transition:all .15s;font-family:inherit}.choice:hover:not(:disabled){border-color:var(--contrast);transform:translateY(-1px)}.choice:disabled{cursor:default;opacity:.7}.choice.correct{border-color:var(--accent);background:#7ee7872e;box-shadow:0 0 16px #7ee78766}.choice.wrong{border-color:var(--warn);background:#f0883e1f}.feedback{margin-top:8px}.fb{border-radius:8px;padding:14px 16px;margin-top:8px;font-size:14px;line-height:1.6}.fb-title{font-weight:600;margin-bottom:6px}.fb-correct{background:#7ee7871a;border-left:3px solid var(--accent)}.fb-correct .fb-title{color:var(--accent)}.fb-contrast{background:#79c0ff14;border-left:3px solid var(--contrast)}.fb-contrast .fb-title{color:var(--contrast)}.fb-wrong{background:#f0883e1a;border-left:3px solid var(--warn)}.fb-wrong .fb-title{color:var(--warn)}.fb-row-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.fb-row-top .fb-title{margin-bottom:0}.fb-refrain{margin-top:6px;font-size:12px;color:var(--gold);opacity:.8}.fb-sources{margin-top:8px;font-size:11px;color:var(--muted)}.fb-sources a{color:var(--contrast);text-decoration:none;margin-right:4px}.tier-badge{font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--panel-2);color:var(--accent);font-family:SF Mono,Menlo,Consolas,monospace}.tier-badge.rare{background:linear-gradient(90deg,#ffa657,#ff7b3a);color:#fff;box-shadow:0 0 12px #ffa65780}.tier-badge.super{background:linear-gradient(90deg,gold,#ff6bad,#b478ff);background-size:200% 200%;color:#fff;animation:superGlow 1.6s ease-in-out infinite;box-shadow:0 0 18px #ffd70099}@keyframes superGlow{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.example{font-family:-apple-system,Helvetica Neue,sans-serif;font-size:17px;margin:8px 0 6px;color:var(--text)}.gloss{color:var(--muted);font-size:13px;line-height:1.7}.auto-next{margin-top:14px;display:flex;flex-direction:column;align-items:center;gap:4px}.auto-next-bar{width:100%;height:2px;background:var(--panel-2);border-radius:2px;overflow:hidden}.auto-next-bar-fill{height:100%;background:linear-gradient(90deg,var(--contrast),var(--accent));width:0%}.auto-next-text{font-size:11px;color:var(--muted);letter-spacing:.08em}.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;align-items:center}.layer-chip{display:inline-block;padding:4px 10px;border-radius:999px;font-size:11px;font-weight:600;letter-spacing:.04em;border:1px solid var(--border);background:var(--panel-2)}.layer-chip.l1{background:#7ee78726;border-color:#7ee78766;color:#7ee787}.layer-chip.l2{background:#79c0ff26;border-color:#79c0ff66;color:#79c0ff}.layer-chip.l3{background:#d2a8ff26;border-color:#d2a8ff66;color:#d2a8ff}.layer-chip.l4{background:#ffa6572e;border-color:#ffa65773;color:#ffa657}.layer-chip.l5{background:#ff7b722e;border-color:#ff7b7273;color:#ff7b72}.layer-chip.l6{background:#ff6bad2e;border-color:#ff6bad73;color:#ff6bad}.layer-chip.l7{background:#b478ff33;border-color:#b478ff80;color:#b478ff}.layer-chip.l8{background:#78dcdc2e;border-color:#78dcdc73;color:#78dcdc}.pattern-chip{display:inline-block;padding:3px 9px;border-radius:6px;font-size:11px;font-family:SF Mono,Menlo,Consolas,monospace;background:var(--panel-2);color:var(--muted);border:1px solid var(--border)}.fb-pattern{margin-top:8px;padding:8px 10px;background:#79c0ff14;border-left:2px solid var(--contrast);font-size:12px;color:var(--muted)}.fb-pattern code{color:var(--contrast);font-family:SF Mono,Menlo,Consolas,monospace;background:#79c0ff1a;padding:1px 5px;border-radius:3px}.subject-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:24px}.subject-card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:22px 16px 18px;cursor:pointer;text-align:center;color:var(--text);transition:all .18s;font-family:inherit}.subject-card:hover{border-color:var(--contrast);transform:translateY(-2px);box-shadow:0 6px 18px #79c0ff1f}.subject-card .emoji{font-size:32px;margin-bottom:6px}.subject-card .subject-label{font-size:18px;font-weight:600;margin-bottom:4px}.subject-card .subject-tagline{font-size:12px;color:var(--muted);margin-bottom:8px;line-height:1.5}.subject-card .subject-count{font-size:11px;color:var(--accent);background:#7ee78714;display:inline-block;padding:2px 8px;border-radius:999px}.layer-panel{margin-top:32px;padding:20px 18px;background:var(--panel);border:1px solid var(--border);border-radius:10px}.layer-panel-title{margin:0 0 14px;font-size:14px;color:var(--muted);font-weight:500;letter-spacing:.05em;text-transform:uppercase}.layer-bars{display:flex;flex-direction:column;gap:8px}.layer-row{display:grid;grid-template-columns:36px 1fr 60px;gap:12px;align-items:center}.layer-id{font-family:SF Mono,Menlo,Consolas,monospace;font-weight:600;font-size:12px;color:var(--muted)}.layer-info{min-width:0}.layer-label{font-size:12px;margin-bottom:4px}.layer-band{color:var(--muted);font-size:11px;margin-left:6px}.layer-bar{height:6px;background:var(--panel-2);border-radius:3px;overflow:hidden}.layer-bar-fill{height:100%;border-radius:3px;transition:width .4s ease}.layer-bar-fill.l1{background:linear-gradient(90deg,#7ee787,#4ac26b)}.layer-bar-fill.l2{background:linear-gradient(90deg,#79c0ff,#4493f8)}.layer-bar-fill.l3{background:linear-gradient(90deg,#d2a8ff,#a371f7)}.layer-bar-fill.l4{background:linear-gradient(90deg,#ffa657,#f0883e)}.layer-bar-fill.l5{background:linear-gradient(90deg,#ff7b72,#e5534b)}.layer-bar-fill.l6{background:linear-gradient(90deg,#ff6bad,#db2777)}.layer-bar-fill.l7{background:linear-gradient(90deg,#b478ff,#8957e5)}.layer-bar-fill.l8{background:linear-gradient(90deg,#78dcdc,#1f9ea1)}.layer-count{text-align:right;font-size:12px;color:var(--muted);font-family:SF Mono,Menlo,Consolas,monospace}.layer-note{margin-top:14px;font-size:11px;color:var(--muted);line-height:1.5}.contrastive-stack{display:flex;flex-direction:column;gap:8px;margin:4px 0}.contrastive-stack .fb{margin-top:0;animation:slideIn .22s ease-out both}@keyframes slideIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.meta{margin-top:24px;color:var(--muted);font-size:12px;line-height:1.6}.meta strong{color:var(--text)}.meta a{color:var(--contrast)}.back{background:transparent;color:var(--muted);border:1px solid var(--border);padding:6px 12px;border-radius:6px;cursor:pointer;font-size:12px;font-family:inherit}.back:hover{color:var(--text);border-color:var(--contrast)}.card.flash-correct{animation:flashCorrect .6s ease-out}.card.flash-rare{animation:flashRare .7s ease-out}.card.flash-super{animation:flashSuper .9s ease-out}@keyframes flashCorrect{0%{box-shadow:0 8px 24px #00000040;transform:translateY(0) scale(1)}20%{box-shadow:0 0 60px #7ee787b3,0 0 120px #7ee78766;transform:translateY(-4px) scale(1.012)}to{box-shadow:0 8px 24px #00000040;transform:translateY(0) scale(1)}}@keyframes flashRare{0%{box-shadow:0 8px 24px #00000040;transform:translateY(0) scale(1)}25%{box-shadow:0 0 80px #ffa657d9,0 0 160px #ff7b3a80;transform:translateY(-6px) scale(1.018)}to{box-shadow:0 8px 24px #00000040;transform:translateY(0) scale(1)}}@keyframes flashSuper{0%{box-shadow:0 8px 24px #00000040;transform:translateY(0) scale(1)}25%{box-shadow:0 0 100px #ffd700e6,0 0 200px #b478ff99;transform:translateY(-8px) scale(1.025)}60%{box-shadow:0 0 100px #ff6bade6,0 0 200px #79c0ff99}to{box-shadow:0 8px 24px #00000040;transform:translateY(0) scale(1)}}.card.shake-wrong{animation:shakeWrong .5s ease-out}@keyframes shakeWrong{0%,to{transform:translate(0)}10%{transform:translate(-8px)}30%{transform:translate(8px)}50%{transform:translate(-6px)}70%{transform:translate(6px)}90%{transform:translate(-3px)}}.score-pop{position:fixed;font-size:32px;font-weight:800;color:var(--gold);font-family:SF Mono,Menlo,Consolas,monospace;pointer-events:none;z-index:9000;text-shadow:0 0 14px rgba(255,215,0,.8),0 0 28px rgba(255,215,0,.4);transform:translate(-50%,-50%) scale(.6);opacity:0;transition:transform .5s cubic-bezier(.5,-.2,.4,1.4),opacity .5s ease}.particle{position:fixed;width:8px;height:8px;border-radius:50%;pointer-events:none;z-index:8000;animation:particleBurst .7s ease-out forwards;box-shadow:0 0 8px currentColor}@keyframes particleBurst{0%{transform:translate(-50%,-50%) translate(0) scale(1);opacity:1}to{transform:translate(-50%,-50%) translate(var(--dx),var(--dy)) scale(0);opacity:0}}.big-overlay{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(.7);padding:22px 40px;border-radius:16px;text-align:center;pointer-events:none;z-index:9999;opacity:0;transition:opacity .25s ease,transform .35s cubic-bezier(.3,1.5,.5,1);font-weight:800;letter-spacing:.04em;color:#fff;min-width:240px}.big-overlay.show{opacity:1;transform:translate(-50%,-50%) scale(1)}.big-overlay-main{font-size:26px}.big-overlay-sub{font-size:13px;margin-top:6px;opacity:.85;font-weight:600}.overlay-chain3{background:linear-gradient(135deg,#ff7b3a,#ff6bad);box-shadow:0 12px 40px #ff7b3a80}.overlay-chain5{background:linear-gradient(135deg,gold,#ff7b3a);box-shadow:0 12px 50px #ffd700b3;animation:shimmer .6s ease-in-out}.overlay-chain10{background:linear-gradient(135deg,gold,#ff6bad,#b478ff,#79c0ff);background-size:300% 300%;box-shadow:0 16px 80px #ffd700d9,0 0 100px #ff6bad80;animation:feverPulse .8s ease-in-out infinite;font-size:30px}@keyframes shimmer{0%,to{filter:brightness(1)}50%{filter:brightness(1.4)}}@keyframes feverPulse{0%,to{background-position:0% 50%;transform:translate(-50%,-50%) scale(1)}50%{background-position:100% 50%;transform:translate(-50%,-50%) scale(1.06)}}.overlay-levelup{background:linear-gradient(135deg,#b478ff,#79c0ff,#7ee787);background-size:200% 200%;box-shadow:0 16px 60px #b478ffb3;animation:levelupShine 1.2s ease-in-out}@keyframes levelupShine{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.overlay-revenge{background:linear-gradient(135deg,gold,#ffa657,#ff7b3a);box-shadow:0 14px 50px #ffd700b3}.overlay-fever-end{background:linear-gradient(135deg,var(--panel),var(--panel-2));border:1px solid var(--border);color:var(--muted);font-weight:600}body.fever-mode{position:relative}body.fever-mode:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;background:radial-gradient(circle at 20% 30%,rgba(255,215,0,.18),transparent 40%),radial-gradient(circle at 80% 70%,rgba(255,107,173,.18),transparent 40%),radial-gradient(circle at 50% 100%,rgba(180,120,255,.14),transparent 50%);animation:feverBg 4s ease-in-out infinite;z-index:1}body.fever-mode #app{position:relative;z-index:2}body.fever-mode .card{border-color:#ffd70080;box-shadow:0 0 40px #ffd70040,0 0 80px #ff6bad26}body.fever-mode .hud{border-color:#ffd70066;box-shadow:0 0 20px #ffd70033}@keyframes feverBg{0%,to{opacity:.8}50%{opacity:1.2}}@media (max-width: 540px){.hud{grid-template-columns:1fr 1.4fr .9fr .9fr .9fr;padding:8px 10px;gap:4px}.hud-value{font-size:17px}.hud-label{font-size:9px}.prompt{font-size:19px}.big-overlay-main{font-size:22px}}