:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1b1d29;
  --muted: #5b6178;
  --line: #e2e5ef;
  --accent: #5b4bd6;
  --accent-strong: #4638b8;
  --accent-soft: #ece9fd;
  --danger: #a8331f;
  --danger-soft: #fdeceb;
  --shadow: 0 12px 32px rgba(28, 30, 48, 0.08);
  --ring-track: #e8e9f4;
  font: 16px/1.55 "system-ui", -apple-system, "Segoe UI", "Noto Sans SC", "PingFang SC", sans-serif;
}
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #14151c;
  --card: #1c1e27;
  --text: #f0f1f7;
  --muted: #a6abc0;
  --line: #2c2f3c;
  --accent: #a99cff;
  --accent-strong: #c3b8ff;
  --accent-soft: #2a2745;
  --danger: #ffab9c;
  --danger-soft: #3a2523;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  --ring-track: #2d3040;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14151c;
    --card: #1c1e27;
    --text: #f0f1f7;
    --muted: #a6abc0;
    --line: #2c2f3c;
    --accent: #a99cff;
    --accent-strong: #c3b8ff;
    --accent-soft: #2a2745;
    --danger: #ffab9c;
    --danger-soft: #3a2523;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    --ring-track: #2d3040;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-text-size-adjust: 100%;
}
.app {
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 20px 16px 40px;
}
.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
h1 { font-size: 1.5rem; line-height: 1.3; margin: 0 0 2px; letter-spacing: 0.01em; }
h2 { font-size: 1.05rem; margin: 0; }
.status { margin: 0; color: var(--muted); font-size: 0.9rem; overflow-wrap: anywhere; }
.account { display: flex; align-items: center; gap: 8px; min-width: 0; }
.who { color: var(--muted); font-size: 0.85rem; max-width: 12rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

button {
  font: inherit;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, transform 80ms ease;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover:not(:disabled) { background: var(--accent-strong); border-color: var(--accent-strong); }
button.ghost { background: transparent; }
button.small { min-height: 36px; padding: 6px 12px; font-size: 0.85rem; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.clock-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px 16px;
  box-shadow: var(--shadow);
}
.dial { position: relative; width: min(15rem, 68vw); margin: 4px auto 12px; aspect-ratio: 1; }
.dial svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-track, .ring-progress { fill: none; stroke-width: 12; }
.ring-track { stroke: var(--ring-track); }
.ring-progress {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 653.45;
  stroke-dashoffset: 653.45;
  transition: stroke-dashoffset 200ms linear;
}
.readout {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}
.time {
  font-size: clamp(2rem, 9vw, 2.9rem);
  font-variant-numeric: tabular-nums;
  font-weight: 650;
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.phase { color: var(--muted); font-size: 0.85rem; }
.done .ring-progress { stroke: var(--danger); }
.done .time { color: var(--danger); }

.controls { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.controls button { flex: 1 1 6rem; max-width: 12rem; }

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
}
.presets button { min-height: 40px; padding: 8px 14px; font-size: 0.9rem; border-radius: 999px; }

.custom { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 14px; }
.custom-label { display: block; color: var(--muted); font-size: 0.85rem; margin-bottom: 8px; }
.custom-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.field { display: inline-flex; align-items: center; gap: 6px; }
.field input {
  width: 4.6rem;
  min-height: 44px;
  padding: 8px 10px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  text-align: center;
}
.field span { color: var(--muted); font-size: 0.85rem; }
.custom-row button { flex: 1 1 5rem; }

.saved {
  margin-top: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px 16px;
}
.saved-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.hint { color: var(--muted); font-size: 0.82rem; margin: 8px 0 0; }
.save-form { margin-top: 12px; padding: 12px; border: 1px dashed var(--line); border-radius: 14px; }
.save-form label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }
.save-row { display: flex; gap: 8px; flex-wrap: wrap; }
.save-row input {
  flex: 1 1 9rem;
  min-height: 44px;
  padding: 8px 12px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.saved-list { list-style: none; margin: 12px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.saved-item {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 8px 10px;
  background: var(--bg);
}
.saved-item .load {
  flex: 1 1 auto;
  min-width: 0;
  text-align: left;
  background: transparent;
  border: none;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.saved-item .label { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.saved-item .meta { color: var(--muted); font-size: 0.8rem; font-variant-numeric: tabular-nums; }
.saved-item .remove { flex: 0 0 auto; min-height: 36px; padding: 6px 10px; font-size: 0.82rem; color: var(--danger); }
.empty { color: var(--muted); font-size: 0.9rem; margin: 12px 0 0; }

.error {
  border: 1px solid var(--line);
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: 16px;
  padding: 16px;
  margin: 12px 0;
}
.error h2 { font-size: 1rem; margin: 0 0 6px; }
.error p { margin: 0 0 12px; color: var(--text); overflow-wrap: anywhere; }
.error button { border-color: currentColor; color: var(--text); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
@media (max-width: 360px) {
  .app { padding: 14px 12px 32px; }
  .controls button { flex: 1 1 100%; max-width: none; }
  .field input { width: 4rem; }
}
@media (min-width: 768px) {
  .app { padding: 28px 24px 48px; }
  .clock-card, .saved { padding: 24px; }
}