:root{--bg: #ffffff;--card: #f2f3f5;--text: #16181c;--muted: #7c8792;--accent: #2f8fed;--accent-text: #ffffff;--danger: #d24a43;--radius: 14px}:root[data-scheme=dark]{--bg: #17212b;--card: #232e3c;--text: #f5f5f5;--muted: #8e9aa6}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.45}.app{max-width:520px;margin:0 auto;padding:20px 16px 40px}.screen{display:flex;flex-direction:column;gap:12px}.screen.center{min-height:60vh;align-items:center;justify-content:center}h1{font-size:22px;margin:4px 0 0}.muted{color:var(--muted)}.small{font-size:14px}.label{font-size:13px;color:var(--muted);margin-bottom:6px}.card{background:var(--card);border-radius:var(--radius);padding:14px 16px}.card.subtle{background:transparent;border:1px solid var(--card)}.card.accent{border:1px solid var(--accent)}.step{font-size:18px;font-weight:500}.input{width:100%;background:var(--card);color:var(--text);border:none;border-radius:var(--radius);padding:14px 16px;font:inherit;resize:vertical}.input:focus{outline:2px solid var(--accent)}.btn{border:none;border-radius:var(--radius);padding:14px 16px;font:inherit;font-weight:500;cursor:pointer;background:var(--card);color:var(--text)}.btn.primary{background:var(--accent);color:var(--accent-text)}.btn.ghost{background:transparent;border:1px solid var(--card);color:var(--text)}.btn:disabled{opacity:.5;cursor:default}.row{display:flex;gap:8px}.row>.btn{flex:1}.row.wrap{flex-wrap:wrap}.row.wrap>.btn{flex:1 1 40%}.timer{text-align:center;padding:20px 0 8px}.timer-value{font-size:56px;font-weight:300;font-variant-numeric:tabular-nums;letter-spacing:-1px}.timer-bar{height:4px;background:var(--card);border-radius:2px;overflow:hidden;margin:12px 0 8px}.timer-fill{height:100%;background:var(--accent);transition:width 1s linear}.stat-row{display:flex;justify-content:space-between;padding:3px 0}.error{background:var(--danger);color:#fff;border-radius:var(--radius);padding:10px 14px;margin-bottom:12px;font-size:14px}