:root {
  color-scheme: light;
  --ps-bg-primary: #ffffff;
  --ps-bg-secondary: #f8fafc;
  --ps-bg-tertiary: #f1f5f9;
  --ps-text-primary: #1e293b;
  --ps-text-secondary: #64748b;
  --ps-text-tertiary: #94a3b8;
  --ps-border-primary: #e2e8f0;
  --ps-border-secondary: #f1f5f9;
  --ps-action-primary: #000000;
  --ps-action-primary-hover: #333333;
  --ps-action-primary-text: #ffffff;
  --ps-success: #10b981;
  --ps-success-soft: #ecfdf5;
  --ps-success-border: #a7f3d0;
  --ps-success-text: #047857;
  --ps-warning: #f59e0b;
  --ps-warning-soft: #fffbeb;
  --ps-warning-border: #fde68a;
  --ps-warning-text: #92400e;
  --ps-danger: #ef4444;
  --ps-danger-soft: #fef2f2;
  --ps-danger-border: #fecaca;
  --ps-danger-text: #b91c1c;
  --ps-radius-sm: 6px;
  --ps-radius: 8px;
  --ps-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  --ps-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --ps-font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --ink: var(--ps-text-primary);
  --muted: var(--ps-text-secondary);
  --subtle: var(--ps-bg-tertiary);
  --soft: var(--ps-bg-tertiary);
  --line: var(--ps-border-primary);
  --paper: var(--ps-bg-primary);
  --canvas: var(--ps-bg-secondary);
  --accent: var(--ps-action-primary);
  --accent-muted: #374151;
  --status-bg: var(--ps-bg-secondary);
  --status-line: var(--ps-border-primary);
  --success: var(--ps-success);
  --success-soft: var(--ps-success-soft);
  --success-line: var(--ps-success-border);
  --warning: var(--ps-warning);
  --warning-soft: var(--ps-warning-soft);
  --warning-line: var(--ps-warning-border);
  --danger: var(--ps-danger);
  --danger-soft: var(--ps-danger-soft);
  --danger-line: var(--ps-danger-border);
  --shadow: var(--ps-shadow-md);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --ps-bg-primary: #202123;
    --ps-bg-secondary: #2a2b32;
    --ps-bg-tertiary: #343541;
    --ps-text-primary: #ffffff;
    --ps-text-secondary: #8e8ea0;
    --ps-text-tertiary: #6b7280;
    --ps-border-primary: #343541;
    --ps-border-secondary: #565869;
    --ps-action-primary: #ffffff;
    --ps-action-primary-hover: #e5e7eb;
    --ps-action-primary-text: #111827;
    --ps-success-soft: rgba(16, 185, 129, 0.14);
    --ps-success-border: rgba(16, 185, 129, 0.36);
    --ps-success-text: #34d399;
    --ps-warning-soft: rgba(245, 158, 11, 0.16);
    --ps-warning-border: rgba(245, 158, 11, 0.36);
    --ps-warning-text: #fbbf24;
    --ps-danger-soft: rgba(239, 68, 68, 0.16);
    --ps-danger-border: rgba(239, 68, 68, 0.36);
    --ps-danger-text: #f87171;
    --ps-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.32);
    --ps-shadow-md: 0 10px 24px rgba(0, 0, 0, 0.28);
    --accent-muted: var(--ps-text-secondary);
  }
}

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--ps-font-family);
}

button,
input,
select,
textarea {
  font: inherit;
}

.primary-btn,
.secondary-btn,
.icon-btn,
.book-btn,
.pay-btn,
.account-chip,
.ps-btn {
  border: 1px solid var(--line);
  border-radius: var(--ps-radius);
  min-height: 38px;
  background: var(--paper);
  color: var(--ink);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.primary-btn,
.book-btn,
.pay-btn,
.ps-btn-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--ps-action-primary-text);
}

.secondary-btn,
.account-chip,
.ps-btn-secondary {
  border-color: var(--line);
  background: var(--paper);
  color: var(--ink);
}

.icon-btn,
.ps-btn-icon {
  width: 38px;
  padding: 0;
}

.primary-btn:hover,
.book-btn:hover,
.pay-btn:hover,
.ps-btn-primary:hover {
  background: var(--ps-action-primary-hover);
  border-color: var(--ps-action-primary-hover);
}

.secondary-btn:hover,
.icon-btn:hover,
.account-chip:hover,
.ps-btn-secondary:hover,
.ps-btn-icon:hover {
  background: var(--subtle);
}

.account-avatar,
.account-dot {
  background: var(--accent);
  color: var(--ps-action-primary-text);
}

button:disabled,
.primary-btn:disabled,
.secondary-btn:disabled,
.icon-btn:disabled,
.book-btn:disabled,
.pay-btn:disabled,
.ps-btn:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

input,
select,
textarea {
  border-color: var(--line);
  background: var(--paper);
  color: var(--ink);
}

input::placeholder,
textarea::placeholder {
  color: var(--ps-text-tertiary);
}

.pill,
.ps-pill {
  border-color: var(--line);
  background: var(--subtle);
  color: var(--muted);
}

.pill.strong,
.ps-pill-strong {
  border-color: var(--line);
  background: var(--subtle);
  color: var(--ink);
}

.pill.green,
.ps-pill-success {
  border-color: var(--success-line);
  background: var(--success-soft);
  color: var(--ps-success-text);
}

.pill.amber,
.ps-pill-warning {
  border-color: var(--warning-line);
  background: var(--warning-soft);
  color: var(--ps-warning-text);
}

.pill.red,
.ps-pill-danger {
  border-color: var(--danger-line);
  background: var(--danger-soft);
  color: var(--ps-danger-text);
}

.pill.gray,
.ps-pill-muted {
  border-color: var(--line);
  background: var(--subtle);
  color: var(--muted);
}

.drawer,
.stat,
.toolbar,
.sheet,
.settings-card,
.course-card,
.policy,
.booking-panel,
.checkout,
.course-form,
.panel,
.sidebar-footer,
.account-trigger,
.account-menu {
  background: var(--paper);
  border-color: var(--line);
}

.sidebar,
aside,
.intro,
.drawer-notice,
.open-summary div,
.kv div,
.source-box,
.profile-box,
.link-box {
  background: var(--ps-bg-secondary);
  border-color: var(--line);
}

.sheet-head,
.tabs,
.row:hover,
.row.selected {
  background: var(--subtle);
}

.account-menu button,
.nav button,
.ghost-btn,
.tabs button,
.filters select,
.block-form input,
.block-form select,
.block-form textarea {
  color: var(--ink);
}

.account-menu button:hover,
.nav button.active,
.tabs button.active {
  background: var(--paper);
  color: var(--ink);
}

.drawer-backdrop {
  background: rgba(15, 23, 42, 0.22);
}

@media (prefers-color-scheme: dark) {
  .hero {
    color: #ffffff;
  }

  .drawer-close,
  .account-chip,
  .account-menu,
  .account-trigger,
  .sidebar-footer,
  .tabs button.active,
  .filters select,
  .block-form input,
  .block-form select,
  .block-form textarea,
  input,
  select,
  textarea {
    background: var(--ps-bg-tertiary);
    border-color: var(--ps-border-secondary);
    color: var(--ink);
  }

  .drawer-backdrop {
    background: rgba(0, 0, 0, 0.42);
  }
}