:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #14181f;
  --muted: #5c6470;
  --accent: #2b6cff;
  --border: #e2e4e9;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1117;
    --surface: #171b23;
    --text: #f2f4f8;
    --muted: #9aa3b2;
    --accent: #5b8dff;
    --border: #2a2f3a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1rem, 4vw, 3rem) 1rem;
}

.page-header h1 {
  margin: 0 0 0.2rem;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
}

.domain {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.01em;
}

.intro {
  margin: 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.header-actions {
  flex-shrink: 0;
  display: flex;
  gap: 0.6rem;
}

.settings-btn {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

.settings-btn:hover { background: var(--border); }

.settings-btn[hidden] { display: none; }

.clock-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  padding: 0.75rem clamp(1rem, 4vw, 3rem) 1rem;
  min-height: 0;
}

.tile {
  container-type: size;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.tile__remove {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
}

.tile__remove:hover { background: var(--border); color: var(--text); }

.tile__time {
  font-variant-numeric: tabular-nums;
  font-size: var(--time-font-size, clamp(1.8rem, min(20cqw, 34cqh), 16rem));
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.05;
}

.tile__label {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: clamp(0.75rem, min(6cqw, 8cqh), 2.4rem);
  letter-spacing: 0.02em;
}

.tile__date {
  color: var(--muted);
  font-size: clamp(0.7rem, min(5cqw, 7cqh), 1.9rem);
  letter-spacing: 0.02em;
  margin-bottom: 0.15rem;
}

.page-footer {
  padding: 1rem clamp(1rem, 4vw, 3rem) 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
}

.page-footer p { margin: 0; }

.settings-panel {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 10;
}

.settings-panel[hidden] { display: none; }

.settings-panel__dialog {
  background: var(--surface);
  color: var(--text);
  width: 100%;
  max-width: 420px;
  max-height: 80vh;
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.settings-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.settings-panel__header h2 { margin: 0; font-size: 1.1rem; }

.icon-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

.settings-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.settings-row { display: flex; }

.settings-row--indent { padding-left: 1.6rem; margin-top: -0.35rem; }

.switch-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  cursor: pointer;
}

.switch-row input { width: 17px; height: 17px; cursor: pointer; }

.switch-row input:disabled { cursor: not-allowed; }
.switch-row input:disabled + span { color: var(--muted); }

.select-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
  font-size: 0.95rem;
}

.select-row select {
  padding: 0.4rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
}

.select-row select:disabled { opacity: 0.5; }

.settings-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0.25rem 0;
}

#tz-search {
  padding: 0.6rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
}

.tz-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  border-top: 1px solid var(--border);
}

.tz-list li {
  border-bottom: 1px solid var(--border);
}

.tz-list label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.25rem;
  font-size: 0.9rem;
  cursor: pointer;
}

.tz-list input[disabled] + span { color: var(--muted); }