:root{--bg:#0d1a1d;--panel:#132427;--panel-border:#22383c;--text:#f2f7f6;--text-dim:#93a8a8;--accent:#33c3d6;--accent-soft:rgba(51,195,214,0.16);--ink:#081113;--mode-short:#23d2e0;--mode-minute:#4fa3d8;--mode-full:#3a5f8a;--good:#33c3d6;--warn:#4fa3d8;--bad:#e2685c}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,sans-serif}a{color:var(--accent)}.header{padding:16px 20px;border-bottom:3px solid var(--accent);background:var(--panel)}.brand-title{font-size:24px;font-weight:800;letter-spacing:.04em;margin:0;color:var(--text)}.brand-title .accent{color:var(--accent)}.brand-subtitle{font-size:12px;color:var(--text-dim);margin:6px 0 0}.submit-cta{display:inline-block;padding:10px 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p{margin:0;font-size:12px;color:var(--text-dim)}.quiz-card-records{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.quiz-card-record{display:flex;align-items:center;gap:4px;font-size:11px;padding:3px 8px;border-radius:999px;background:var(--bg);border:1px solid var(--panel-border)}.quiz-card-record-label{color:var(--text-dim)}.quiz-card-record-value{font-weight:700;color:var(--accent)}.quiz-card-record-empty{font-weight:400;color:var(--text-dim)}.header-links{display:flex;align-items:center;gap:16px;margin-top:12px}.back-link{display:inline-block;margin-bottom:16px;font-size:13px;text-decoration:none}.target-thumb{text-align:center;margin-bottom:20px}.play-instruction,.target-thumb-label{font-size:15px;font-weight:700;color:var(--accent);margin:0 0 8px}.target-thumb img{width:100%;max-width:480px;border-radius:12px;border:1px solid var(--panel-border)}.target-thumb-meta{font-size:12px;color:var(--text-dim);margin:8px 0 0}.stage{display:flex;flex-direction:column;align-items:center;gap:16px}.player-wrap{width:100%;max-width:480px;aspect-ratio:16/9;background:#000;border-radius:12px;border:1px solid var(--panel-border);overflow:hidden}.player-wrap iframe,.stage-start-cover{width:100%;height:100%}.stage-start-cover{display:flex;align-items:center;justify-content:center;border:none;border-radius:0;background:#000;color:var(--accent);font-size:18px;font-weight:800;cursor:pointer}.stage-start-cover:hover{color:var(--text)}.stage-controls{min-height:56px;display:flex;align-items:center;justify-content:center}.stage-hint{color:var(--text-dim);font-size:13px}.play-screen{max-width:min(1600px,96vw)}.play-compare-row{display:flex;flex-wrap:wrap;gap:20px;align-items:flex-start;margin-bottom:12px}.play-compare-col{flex:1 1 420px;min-width:0}.play-compare-col .player-wrap{max-width:none}.play-compare-col .target-thumb img{max-width:none;aspect-ratio:16/9;object-fit:cover}.target-thumb-compact{margin-bottom:0}.play-instruction{text-align:center}.play-meta{font-size:12px;margin:0 0 16px}.play-compare-label,.play-meta{text-align:center;color:var(--text-dim)}.play-compare-label{font-size:11px;font-weight:700;margin:0 0 6px;text-transform:uppercase;letter-spacing:.08em}.mode-picker-button,.retry-button,.reveal-button,.stop-button,.submit-input-row button,.submit-publish{border:1px solid var(--panel-border);border-radius:10px;font-weight:700;cursor:pointer;transition:border-color .15s ease,transform .15s ease,background .15s ease}.mode-picker-button:hover,.retry-button:hover,.reveal-button:hover,.submit-input-row button:hover{border-color:var(--accent);transform:translateY(-1px)}.mode-picker-button:active,.retry-button:active,.reveal-button:active,.stop-button:active,.submit-input-row button:active,.submit-publish:active{transform:translateY(1px)}.stop-button{padding:14px 32px;font-size:16px;border-radius:999px;border-width:2px;background:var(--ink);color:#fff;border-color:var(--accent)}.stop-button:hover{background:#14282b}.result-panel{margin-top:24px;padding:24px 20px;border:1px solid var(--panel-border);border-radius:16px;background:var(--panel);text-align:center}.result-mode{font-size:12px;color:var(--text-dim);margin:0 0 4px}.result-rank{font-size:30px;font-weight:800;margin:0 0 8px}.result-rank-perfect{color:var(--accent)}.result-rank-great{color:var(--good)}.result-rank-good{color:var(--warn)}.result-rank-miss{color:var(--bad)}.result-diff{font-size:15px;margin:0 0 4px}.result-best{font-size:12px;color:var(--text-dim);margin:0 0 16px}.retry-button,.reveal-button{padding:10px 20px;background:transparent;color:var(--text);margin:0 4px 16px}.retry-button:hover,.reveal-button:hover{color:var(--accent)}.mode-picker{text-align:center;padding:8px 0 24px}.mode-picker-label{font-size:13px;color:var(--text-dim);margin:0 0 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