:root {
  --bg: #f4f6f5; --card: #ffffff; --text: #17201c; --muted: #54625b; --line: #d8dfdb;
  --accent: #0b6b4d; --accent-text: #ffffff; --stop: #b3261e; --stop-text: #ffffff;
  --pos: #0b6b4d; --neg: #b3261e; --chip: #e7efeb; --focus: #1a56c4;
  --shadow: 0 1px 2px rgb(0 0 0 / 6%), 0 4px 14px rgb(0 0 0 / 5%);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101513; --card: #19201d; --text: #e8efeb; --muted: #a3b1aa; --line: #2c3833;
    --accent: #4cc79a; --accent-text: #06281c; --stop: #ff8a80; --stop-text: #3a0a06;
    --pos: #5fd6a8; --neg: #ff9a92; --chip: #243029; --focus: #8ab4ff;
    --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #101513; --card: #19201d; --text: #e8efeb; --muted: #a3b1aa; --line: #2c3833;
  --accent: #4cc79a; --accent-text: #06281c; --stop: #ff8a80; --stop-text: #3a0a06;
  --pos: #5fd6a8; --neg: #ff9a92; --chip: #243029; --focus: #8ab4ff;
  --shadow: none; color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
h1, h2 { margin: 0; line-height: 1.2; }
h1 { font-size: 1.25rem; }
h2 { font-size: 1.05rem; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.top, main { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; padding-top: 14px; padding-bottom: 8px; }
.tools { display: flex; flex-wrap: wrap; gap: 6px; }
main { padding-bottom: 48px; display: grid; gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }

button, .btn, input, select {
  font: inherit; color: inherit;
}
button, .btn {
  min-height: 44px; padding: 0 14px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--card); cursor: pointer; display: inline-flex; align-items: center; justify-content: center;
  text-decoration: none;
}
button:hover, .btn:hover { background: var(--chip); }
button.ghost, .btn.ghost { background: transparent; }
button.ghost:hover, .btn.ghost:hover { background: var(--chip); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: transparent; font-weight: 600; }
button.primary:hover { filter: brightness(1.08); background: var(--accent); }
button:disabled { opacity: .55; cursor: default; }
button.small { min-height: 36px; padding: 0 10px; font-size: .9rem; }
button.danger { color: var(--neg); }

.clock { padding: 22px 16px 20px; text-align: center; display: grid; gap: 6px; justify-items: center; }
.now { margin: 0; font-size: clamp(2.6rem, 14vw, 4.2rem); font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -.02em; line-height: 1.05; }
.status { margin: 0; color: var(--muted); }
.elapsed { margin: 0; font-size: 1.5rem; font-weight: 600; font-variant-numeric: tabular-nums; color: var(--accent); min-height: 1.5em; }
.big {
  width: min(100%, 360px); min-height: 84px; margin-top: 8px; font-size: 1.6rem; font-weight: 700;
  border: 0; border-radius: 22px; letter-spacing: .01em;
}
.big.start { background: var(--accent); color: var(--accent-text); }
.big.stop { background: var(--stop); color: var(--stop-text); }
.big:hover { filter: brightness(1.07); background: var(--accent); }
.big.stop:hover { background: var(--stop); }
.big:active { transform: scale(.985); }

.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (min-width: 640px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { padding: 12px 14px; display: grid; gap: 2px; align-content: start; }
.stat .label { color: var(--muted); font-size: .85rem; }
.stat strong { font-size: 1.45rem; font-variant-numeric: tabular-nums; }
.stat .sub { color: var(--muted); font-size: .85rem; font-variant-numeric: tabular-nums; }
.pos { color: var(--pos); }
.neg { color: var(--neg); }

.weeknav { display: flex; align-items: center; gap: 6px; margin-bottom: 10px; }
.weeknav h2 { flex: 1; text-align: center; font-variant-numeric: tabular-nums; }
.day { padding: 12px 14px; margin-bottom: 10px; }
.day.today { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.day.off { background: transparent; box-shadow: none; }
.day-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 10px; }
.day-head .dname { font-weight: 700; }
.day-head .ddate { color: var(--muted); }
.chip { font-size: .8rem; padding: 2px 8px; border-radius: 99px; background: var(--chip); }
.sums { margin-left: auto; font-variant-numeric: tabular-nums; text-align: right; }
.sums .diff { font-weight: 600; margin-left: 6px; }
.entries { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 6px; }
.entry { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 6px 0; border-top: 1px solid var(--line); }
.entry .times { flex: 1; min-width: 150px; font-variant-numeric: tabular-nums; }
.entry .dur { color: var(--muted); font-variant-numeric: tabular-nums; }
.entry .live { color: var(--accent); font-weight: 600; }
.day-actions { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }

dialog { border: 1px solid var(--line); border-radius: 18px; background: var(--card); color: var(--text); padding: 18px; width: min(92vw, 440px); }
dialog::backdrop { background: rgb(0 0 0 / 50%); }
dialog form { display: grid; gap: 12px; }
label { display: grid; gap: 4px; font-size: .92rem; color: var(--muted); }
input, select { min-height: 44px; padding: 0 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--text); width: 100%; }
fieldset { border: 1px solid var(--line); border-radius: 10px; margin: 0; padding: 8px 10px 10px; }
legend { color: var(--muted); font-size: .92rem; padding: 0 4px; }
.days-pick { display: flex; flex-wrap: wrap; gap: 6px; }
.days-pick label { display: inline-flex; grid-auto-flow: column; align-items: center; gap: 6px; color: var(--text); min-height: 44px; padding: 0 10px; border: 1px solid var(--line); border-radius: 10px; }
.days-pick input { width: 20px; min-height: 20px; }
.actions { display: flex; justify-content: flex-end; gap: 8px; }
.hint { color: var(--muted); font-size: .88rem; margin: 0; }
.error { color: var(--neg); margin: 0; font-weight: 600; }
.error[hidden], .hint[hidden] { display: none; }
.empty { color: var(--muted); margin: 8px 0 0; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } .big:active { transform: none; } }
@media (max-width: 480px) {
  .tools { width: 100%; justify-content: space-between; }
  .tools button, .tools .btn { flex: 1; padding: 0 6px; font-size: .9rem; }
  .entry .times { flex-basis: 100%; }
  .entry .dur { flex: 1; }
}

/* login page */
.login { max-width: 380px; padding-top: 12vh; }
.login h1 { text-align: center; }
.login-card { padding: 20px; display: grid; gap: 14px; }
.login-card label { display: grid; gap: 4px; }