:root{--bg:#f4f6f8;--fg:#111827;--card:#fff;--acc:#2563eb;--mut:#6b7280;--bd:#d1d5db}
@media (prefers-color-scheme:dark){:root{--bg:#111827;--fg:#f3f4f6;--card:#1f2937;--mut:#9ca3af;--bd:#374151}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px system-ui,sans-serif}
main{max-width:480px;margin:0 auto;padding:16px}
h1{font-size:1.1rem;text-align:center;margin:4px 0}
.mode{text-align:center;color:var(--mut);text-transform:uppercase;letter-spacing:.1em;font-size:.8rem}
.face{text-align:center;font-size:4.5rem;font-weight:700;font-variant-numeric:tabular-nums;margin:8px 0}
.sub{text-align:center;color:var(--mut);min-height:1.4em}
section{background:var(--card);border-radius:12px;padding:12px;margin:12px 0}
.label{color:var(--mut);font-size:.85rem;margin-bottom:6px;display:block}
.presets{display:flex;flex-wrap:wrap;gap:6px}
button{font:inherit;border:1px solid var(--bd);background:var(--card);color:var(--fg);border-radius:10px;padding:8px 12px}
button.sel{background:var(--acc);color:#fff;border-color:var(--acc)}
button.small{padding:6px 10px;font-size:.9rem}
button.danger{color:#dc2626}
input{font:inherit;padding:8px;border:1px solid var(--bd);border-radius:8px;background:var(--card);color:var(--fg)}
.custom{display:flex;gap:6px;margin:10px 0}
.custom input{width:70px}
#brk{width:70px;margin-left:8px}
#note{width:100%;margin:4px 0}
.actions{display:flex;gap:10px}
.big{flex:1;padding:18px;font-size:1.3rem;font-weight:600}
.big.start{background:#16a34a;color:#fff;border-color:#16a34a}
.big.start.running{background:#dc2626;border-color:#dc2626}
.big.brk{background:#f59e0b;color:#111;border-color:#f59e0b}
.totals{display:flex;justify-content:space-between}
.row-actions{display:flex;gap:8px;margin:10px 0}
.log{list-style:none;padding:0;margin:0}
.log li{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-top:1px solid var(--bd)}
.log small{color:var(--mut);display:block}
.log button{padding:2px 8px}