:root{--bg:#fafaf7;--fg:#1a1a1a;--muted:#6b6b6b;--accent:#2a6f97;--warning:#c97400;--danger:#b3261e;--success:#2e7d32;--border:#d6d6d0;color:var(--fg);background:var(--bg);font-family:ui-sans-serif,system-ui,Helvetica Neue,Arial,sans-serif}*{box-sizing:border-box}body{margin:0}.page{max-width:760px;margin:0 auto;padding:24px}button{font:inherit;border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:6px;padding:8px 16px}button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button:disabled{opacity:.5;cursor:not-allowed}input,textarea{font:inherit;border:1px solid var(--border);border-radius:6px;width:100%;padding:8px}textarea{resize:vertical;min-height:60vh}.word-count{font-variant-numeric:tabular-nums;color:var(--danger);font-weight:600}.word-count.met{color:var(--success)}.banner{border:1px solid var(--warning);color:var(--warning);background:#fff7e6;border-radius:6px;margin-bottom:16px;padding:8px 12px}.banner.error{border-color:var(--danger);color:var(--danger);background:#fdecea}.overlay{z-index:50;background:#0000008c;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.overlay .box{text-align:center;background:#fff;border-radius:8px;min-width:280px;padding:24px 32px}.countdown{text-align:center;margin:40px 0;font-size:96px;font-weight:700}.prompt{margin-bottom:16px;font-size:18px;line-height:1.4}.score-big{cursor:pointer;font-size:48px;font-weight:700;-webkit-text-decoration:underline dotted;text-decoration:underline dotted}.dialog{z-index:60;background:#0006;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.dialog .content{background:#fff;border-radius:8px;width:100%;max-width:800px;max-height:80vh;padding:24px;overflow:auto}.diff-add{background:#ded}.diff-del{background:#f5d2d0}.muted{color:var(--muted);font-size:14px}.row{align-items:center;gap:12px;display:flex}.spacer{flex:1}