:root {
  --sleep-primary: #0284c7;
  --sleep-primary-hover: #0369a1;
  --sleep-bg-card: #ffffff;
  --sleep-border: #e2e8f0;
  --sleep-text-main: #0f172a;
  --sleep-text-muted: #64748b;
  --sleep-pill-bg: #f1f5f9;
  --sleep-pill-hover: #e2e8f0;
  --sleep-result-bg: #f8fafc;
  --sleep-rec-border: #0284c7;
  --sleep-rec-bg: #f0f9ff;
  --sleep-rec-badge: #0284c7;
}

.sleep-tool-container {
  max-width: 860px;
  margin: 0 auto 3rem auto;
  font-family: inherit;
  color: var(--sleep-text-main);
}

.sleep-input-card {
  background: var(--sleep-bg-card);
  border: 1px solid var(--sleep-border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.sleep-tab-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--sleep-border);
}

.sleep-tab-btn {
  background: var(--sleep-pill-bg);
  border: 1px solid var(--sleep-border);
  color: var(--sleep-text-muted);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
}

.sleep-tab-btn:hover {
  background: var(--sleep-pill-hover);
}

.sleep-tab-active {
  background: var(--sleep-primary);
  border-color: var(--sleep-primary);
  color: #ffffff;
}

.sleep-presets-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.sleep-presets-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--sleep-text-muted);
}

.sleep-pill-btn {
  background: var(--sleep-pill-bg);
  border: 1px solid var(--sleep-border);
  color: var(--sleep-text-main);
  border-radius: 9999px;
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.sleep-pill-btn:hover {
  background: var(--sleep-pill-hover);
  border-color: var(--sleep-primary);
}

.sleep-inputs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

@media (max-width: 640px) {
  .sleep-inputs-grid {
    grid-template-columns: 1fr;
  }
}

.sleep-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--sleep-text-main);
}

.sleep-field input,
.sleep-field select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--sleep-border);
  border-radius: 8px;
  background: var(--sleep-bg-card);
  color: var(--sleep-text-main);
  font-size: 1rem;
  font-family: inherit;
  box-sizing: border-box;
}

.sleep-field input:focus,
.sleep-field select:focus {
  outline: none;
  border-color: var(--sleep-primary);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.sleep-action-row {
  display: flex;
  gap: 0.75rem;
}

.sleep-primary-btn {
  flex: 2;
  background: var(--sleep-primary);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

.sleep-primary-btn:hover {
  background: var(--sleep-primary-hover);
}

.sleep-secondary-btn {
  background: var(--sleep-pill-bg);
  color: var(--sleep-text-main);
  border: 1px solid var(--sleep-border);
  border-radius: 8px;
  padding: 0.85rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.sleep-results-card {
  background: var(--sleep-result-bg);
  border: 1px solid var(--sleep-border);
  border-radius: 12px;
  padding: 1.75rem;
}

.sleep-results-header {
  text-align: center;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--sleep-border);
  margin-bottom: 1.5rem;
}

.sleep-results-caption {
  display: block;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--sleep-text-main);
  margin-bottom: 0.25rem;
}

.sleep-results-sub {
  margin: 0;
  font-size: 0.85rem;
  color: var(--sleep-text-muted);
}

.sleep-cycles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .sleep-cycles-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.sleep-cycle-card {
  background: var(--sleep-bg-card);
  border: 1px solid var(--sleep-border);
  border-radius: 10px;
  padding: 1.25rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.sleep-cycle-rec {
  border: 2px solid var(--sleep-rec-border);
  background: var(--sleep-rec-bg);
}

.sleep-cycle-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sleep-text-muted);
  margin-bottom: 0.5rem;
}

.sleep-cycle-rec .sleep-cycle-badge {
  color: var(--sleep-rec-badge);
}

.sleep-cycle-time {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--sleep-text-main);
  margin-bottom: 0.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.sleep-cycle-rec .sleep-cycle-time {
  color: var(--sleep-primary);
}

.sleep-cycle-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.sleep-cycle-meta strong {
  font-size: 0.85rem;
  color: var(--sleep-text-main);
}

.sleep-cycle-meta span {
  font-size: 0.75rem;
  color: var(--sleep-text-muted);
}

.sleep-stages-guide {
  background: var(--sleep-bg-card);
  border: 1px solid var(--sleep-border);
  border-radius: 10px;
  padding: 1.25rem;
}

.sleep-guide-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 0.75rem 0;
  color: var(--sleep-text-main);
}

.sleep-stages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

@media (max-width: 640px) {
  .sleep-stages-grid {
    grid-template-columns: 1fr;
  }
}

.sleep-stage-box {
  background: var(--sleep-pill-bg);
  border: 1px solid var(--sleep-border);
  border-radius: 8px;
  padding: 0.85rem;
}

.sleep-stage-box strong {
  display: block;
  font-size: 0.85rem;
  color: var(--sleep-text-main);
  margin-bottom: 0.25rem;
}

.sleep-stage-box p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--sleep-text-muted);
}

.sleep-cycle-short {
  opacity: 0.85;
}

.sleep-ad {
  overflow: hidden;
  min-height: 280px;
  margin: 32px 0;
  text-align: center;
}
/* tf:dark-palette — generated by migrate_chrome.py */
/* Neutrals inherit the shared chrome tokens so all tools share one
   ground; brand hues are kept and lightened, never inverted. */
[data-theme="dark"] {
  --sleep-primary: #81bcda;
  --sleep-primary-hover: #69aed4;
  --sleep-bg-card: var(--tf-surface);
  --sleep-border: var(--tf-surface);
  --sleep-text-main: var(--tf-ink);
  --sleep-text-muted: var(--tf-ink-faint);
  --sleep-pill-bg: var(--tf-surface);
  --sleep-pill-hover: var(--tf-surface);
  --sleep-result-bg: var(--tf-surface);
  --sleep-rec-border: #81bcda;
  --sleep-rec-bg: var(--tf-surface);
  --sleep-rec-badge: #81bcda;
}