/* T.05 exam timer — shared lab-notebook look. */
:root, [data-theme="dark"] {
    --bg: #0b0d0c; --surface: #131716; --surface2: #191f1d;
    --line: #26302b; --line-soft: #1c2320;
    --ink: #e9eee6; --muted: #a9b4a9; --faint: #6e7a71;
    --lime: #c8f04b; --lime-ink: #1a2005; --amber: #ffa14a; --red: #ff6f6f;
    --serif: "Newsreader", Georgia, serif;
    --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
    --sans: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--sans); background: var(--bg); color: var(--ink); line-height: 1.6; font-size: 16px; -webkit-font-smoothing: antialiased; }
.wrap { max-width: 760px; margin: auto; padding: 0 28px; }
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--lime); color: var(--lime-ink); padding: 10px 16px; border-radius: 0 0 8px 0; z-index: 50; font-family: var(--mono); font-size: 0.85rem; }
.skip-link:focus { left: 0; }
.topbar { border-bottom: 1px solid var(--line); padding: 14px 0; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; }
.back { font-family: var(--mono); font-size: 0.85rem; text-decoration: none; color: var(--muted); }
.back:hover { color: var(--lime); }
.tool-tag { font-family: var(--mono); font-size: 0.75rem; color: var(--faint); text-transform: uppercase; letter-spacing: 0.1em; }
.head { padding: 40px 0 26px; }
h1 { font-family: var(--serif); font-size: clamp(2.2rem, 5vw, 3.2rem); letter-spacing: -0.02em; line-height: 1.05; }
h1 em { font-style: italic; color: var(--lime); }
.sub { color: var(--muted); margin-top: 8px; }
h2 { font-family: var(--mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--faint); margin-bottom: 12px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 30px 26px; margin-bottom: 22px; }
.stage { text-align: center; border-top: 3px solid var(--lime); }
.clock { font-family: var(--mono); font-weight: 700; font-size: clamp(3.4rem, 12vw, 6rem); letter-spacing: -0.02em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.clock.overtime { color: var(--red); }
.phase { font-family: var(--mono); font-size: 0.82rem; color: var(--faint); text-transform: uppercase; letter-spacing: 0.14em; margin: 6px 0 14px; min-height: 1.5em; }
.progress-line { height: 10px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line); overflow: hidden; margin-bottom: 20px; }
.progress-line div { height: 100%; width: 0%; background: var(--lime); }
.progress-line div.low { background: var(--amber); }
.progress-line div.done { background: var(--red); }
.controls { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.btn { font-family: var(--mono); font-size: 0.9rem; padding: 12px 26px; border-radius: 9px; border: 1px solid var(--line); background: transparent; color: var(--ink); cursor: pointer; }
.btn:hover:not(:disabled) { border-color: var(--lime); color: var(--lime); }
.btn:disabled { opacity: 0.35; cursor: default; }
.btn.solid { background: var(--lime); border-color: var(--lime); color: var(--lime-ink); font-weight: 700; }
.btn.solid:hover:not(:disabled) { color: var(--lime-ink); box-shadow: 3px 3px 0 var(--amber); }
.btn.sm { padding: 9px 16px; font-size: 0.8rem; }
.presets { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.chip { font-family: var(--mono); font-size: 0.85rem; padding: 8px 18px; border-radius: 999px; background: transparent; color: var(--muted); border: 1px solid var(--line); cursor: pointer; }
.chip:hover { border-color: var(--lime); color: var(--ink); }
.chip.active { background: var(--lime); border-color: var(--lime); color: var(--lime-ink); font-weight: 700; }
.row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.field { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); display: grid; gap: 6px; }
input[type="number"] { font-family: var(--mono); font-size: 1rem; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; color: var(--ink); padding: 9px 12px; width: 100px; }
input:focus { outline: 2px solid var(--lime); outline-offset: 1px; }
.check { display: flex; gap: 10px; align-items: center; font-size: 0.88rem; color: var(--muted); margin-top: 14px; cursor: pointer; }
.check input { width: 19px; height: 19px; accent-color: var(--lime); }
.foot { padding: 18px 28px 40px; font-family: var(--mono); font-size: 0.75rem; color: var(--faint); }