:root{--bg:#f6f4ee;--surface:#fff;--text:#1a1a1a;--muted:#6b6b6b;--accent:#d97706;--accent-soft:#fef3c7;--green:#15803d;--green-bg:#dcfce7;--red:#b91c1c;--red-bg:#fee2e2;--border:#e7e5e0;--shadow:0 1px 3px #0000000f, 0 8px 28px #00000012}*{box-sizing:border-box}html,body,#root{margin:0;padding:0}#root{width:100%;min-height:100dvh}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;overscroll-behavior-y:contain;min-height:100dvh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;line-height:1.5}button{-webkit-tap-highlight-color:transparent;font-family:inherit}.page{max-width:640px;padding:20px 16px 60px;padding-top:max(20px, env(safe-area-inset-top));padding-left:max(16px, env(safe-area-inset-left));padding-right:max(16px, env(safe-area-inset-right));padding-bottom:max(60px, env(safe-area-inset-bottom));margin:0 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var(--border);flex-wrap:wrap;align-items:baseline;gap:10px;padding-bottom:10px;display:flex}.back-native{word-break:keep-all;font-size:18px;font-weight:700}.back-romanization{color:var(--muted);font-size:13px;font-style:italic}.english-row{justify-content:space-between;align-items:center;gap:12px;margin-top:6px;display:flex}.english-large{color:var(--accent);font-size:22px;font-weight:700}.audio-btn-icon{background:var(--accent-soft);width:40px;height:40px;color:var(--accent);cursor:pointer;-webkit-tap-highlight-color:transparent;border:0;border-radius:999px;flex:none;justify-content:center;align-items:center;padding:0 0 0 2px;font-size:14px;font-weight:700;display:inline-flex}.audio-btn-icon:hover{filter:brightness(.95)}.audio-btn-icon:active{transform:scale(.96)}.story{color:#2a2a2a;margin:4px 0 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16px;font-size:13px;line-height:1.5}.box-list{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.box-row{grid-template-columns:110px 1fr 36px;align-items:center;gap:10px;display:grid}.box-label{flex-direction:column;display:flex}.box-num{font-size:14px;font-weight:700}.box-interval{color:var(--muted);font-size:11px}.box-bar{background:var(--border);border-radius:8px;height:14px;overflow:hidden}.box-fill{border-radius:8px;height:100%;transition:width .4s cubic-bezier(.2,.8,.2,1)}.box-fill-1{background:#f97316}.box-fill-2{background:#eab308}.box-fill-3{background:#84cc16}.box-fill-4{background:#22c55e}.box-fill-5{background:#15803d}.box-count{text-align:right;color:var(--text);font-size:14px;font-weight:700}.deck-grid{grid-template-columns:repeat(4,1fr);gap:10px;display:grid}.deck-stat{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:12px;padding:12px 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