/* ==========================================================================
   Theme — dark mode variables, toggle, polish
   ========================================================================== */

/* Smooth theme transitions (respect reduced motion) */
html:not(.plan-no-theme-transition) body.plan-page,
html:not(.plan-no-theme-transition) .plan-header,
html:not(.plan-no-theme-transition) .plan-bottom-nav,
html:not(.plan-no-theme-transition) .plan-section,
html:not(.plan-no-theme-transition) .plan-checklist-group--card,
html:not(.plan-no-theme-transition) .plan-today-block,
html:not(.plan-no-theme-transition) .plan-progress-status,
html:not(.plan-no-theme-transition) .plan-daily-card,
html:not(.plan-no-theme-transition) .plan-weight-form--card,
html:not(.plan-no-theme-transition) .plan-swim-card,
html:not(.plan-no-theme-transition) .plan-sheet__panel,
html:not(.plan-no-theme-transition) .plan-input {
  transition:
    background-color 0.35s var(--plan-ease),
    color 0.25s var(--plan-ease),
    border-color 0.35s var(--plan-ease),
    box-shadow 0.35s var(--plan-ease);
}

/* --- Light theme nav / surface extras (defaults) --- */
:root {
  --plan-nav-bg: rgba(255, 255, 255, 0.94);
  --plan-header-inset: rgba(255, 255, 255, 0.8);
  --plan-input-bg: var(--plan-surface);
  --plan-chip-accent-text: #9a5a10;
  --plan-nav-highlight: rgba(10, 107, 94, 0.1);
}

/* --- Dark palette --- */
[data-theme="dark"] {
  color-scheme: dark;

  --plan-bg: #0a1210;
  --plan-bg-mesh:
    radial-gradient(ellipse 80% 60% at 10% 0%, rgba(45, 212, 191, 0.08) 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 10%, rgba(232, 146, 58, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(8, 145, 178, 0.06) 0%, transparent 55%),
    linear-gradient(180deg, #0c1412 0%, #0a1210 40%, #0d1513 100%);

  --plan-surface: #152220;
  --plan-surface-alt: #1c2e2a;
  --plan-surface-elevated: rgba(21, 34, 32, 0.94);

  --plan-text: #e4efeb;
  --plan-text-muted: #8aa89f;

  --plan-primary: #2dd4bf;
  --plan-primary-dark: #5eead4;
  --plan-primary-light: rgba(45, 212, 191, 0.12);
  --plan-primary-glow: rgba(45, 212, 191, 0.28);

  --plan-accent: #f4a261;
  --plan-accent-light: rgba(244, 162, 97, 0.14);
  --plan-accent-glow: rgba(244, 162, 97, 0.22);

  --plan-swim: #22d3ee;
  --plan-swim-light: rgba(34, 211, 238, 0.12);

  --plan-danger: #f87171;
  --plan-danger-light: rgba(248, 113, 113, 0.12);
  --plan-warning: #fbbf24;
  --plan-warning-light: rgba(251, 191, 36, 0.12);
  --plan-success: #4ade80;
  --plan-success-light: rgba(74, 222, 128, 0.1);

  --plan-border: rgba(148, 196, 184, 0.12);
  --plan-border-strong: rgba(148, 196, 184, 0.22);

  --plan-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25), 0 4px 12px rgba(0, 0, 0, 0.2);
  --plan-shadow: 0 2px 8px rgba(0, 0, 0, 0.22), 0 12px 32px rgba(0, 0, 0, 0.28);
  --plan-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3), 0 24px 48px rgba(0, 0, 0, 0.35);

  --plan-gradient-primary: linear-gradient(135deg, #0d9488 0%, #14b8a6 50%, #0891b2 100%);
  --plan-gradient-accent: linear-gradient(135deg, #e8923a 0%, #f4a261 100%);
  --plan-gradient-progress: linear-gradient(90deg, #14b8a6, #2dd4bf, #f4a261);

  --plan-nav-bg: rgba(12, 20, 18, 0.97);
  --plan-nav-highlight: rgba(45, 212, 191, 0.16);
  --plan-header-inset: rgba(255, 255, 255, 0.04);
  --plan-input-bg: #1a2b28;
  --plan-chip-accent-text: #f4a261;
}

/* --- Header & nav dark tweaks --- */
.plan-header {
  box-shadow: 0 1px 0 var(--plan-header-inset) inset, var(--plan-shadow-sm);
}

.plan-bottom-nav {
  background: var(--plan-nav-bg);
  backdrop-filter: blur(24px) saturate(1.6);
  -webkit-backdrop-filter: blur(24px) saturate(1.6);
  box-shadow: 0 -1px 0 var(--plan-border) inset, 0 -8px 32px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .plan-bottom-nav {
  background: var(--plan-nav-bg);
  box-shadow:
    0 1px 0 rgba(45, 212, 191, 0.06) inset,
    0 -12px 40px rgba(0, 0, 0, 0.55);
  border-top-color: rgba(45, 212, 191, 0.1);
}

.plan-bottom-nav__item {
  position: relative;
  transition: color 0.25s var(--plan-ease), transform 0.15s var(--plan-ease);
}

.plan-bottom-nav__item:active {
  transform: scale(0.96);
}

.plan-bottom-nav__pill {
  transition:
    background 0.25s var(--plan-ease),
    box-shadow 0.25s var(--plan-ease),
    transform 0.2s var(--plan-ease);
}

.plan-bottom-nav__icon {
  transition: transform 0.2s var(--plan-ease), color 0.25s var(--plan-ease);
  color: inherit;
  opacity: 0.72;
}

.plan-bottom-nav__item.is-active {
  color: var(--plan-primary);
}

.plan-bottom-nav__item.is-active .plan-bottom-nav__pill {
  background: var(--plan-nav-highlight);
  box-shadow: 0 2px 8px rgba(10, 107, 94, 0.12);
}

[data-theme="dark"] .plan-bottom-nav__item.is-active .plan-bottom-nav__pill {
  box-shadow: 0 2px 12px rgba(45, 212, 191, 0.15);
}

.plan-bottom-nav__item.is-active .plan-bottom-nav__icon {
  opacity: 1;
  transform: scale(1.05);
  color: var(--plan-primary);
}

.plan-bottom-nav__item.is-active .plan-bottom-nav__label {
  font-weight: 700;
  color: var(--plan-primary);
}

.plan-bottom-nav__label {
  transition: color 0.25s var(--plan-ease), font-weight 0.1s;
}

[data-theme="dark"] .plan-bottom-nav__item:not(.is-active) .plan-bottom-nav__icon {
  opacity: 0.55;
}

[data-theme="dark"] .plan-bottom-nav__item:not(.is-active) .plan-bottom-nav__label {
  color: rgba(138, 168, 159, 0.85);
}

[data-theme="dark"] .plan-header__ring-bg {
  stroke: rgba(148, 196, 184, 0.15);
}

[data-theme="dark"] .plan-progress-status__item--primary {
  border-color: rgba(45, 212, 191, 0.2);
}

[data-theme="dark"] .plan-chip--accent {
  color: var(--plan-chip-accent-text);
}

[data-theme="dark"] .plan-checklist--touch .plan-checklist__item.is-done {
  background: rgba(45, 212, 191, 0.08);
}

[data-theme="dark"] .plan-today-block__icon--workout {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(8, 145, 178, 0.25));
}

[data-theme="dark"] .plan-today-block__icon--diet {
  background: linear-gradient(135deg, rgba(244, 162, 97, 0.18), rgba(232, 146, 58, 0.22));
}

[data-theme="dark"] .plan-swim-card {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.12) 0%, rgba(45, 212, 191, 0.08) 100%);
  border-color: rgba(34, 211, 238, 0.28);
}

[data-theme="dark"] .plan-swim-card__title {
  color: var(--plan-swim);
}

[data-theme="dark"] .plan-swim-card ul,
[data-theme="dark"] .plan-swim-card li {
  color: var(--plan-text-muted);
}

[data-theme="dark"] .plan-badge--primary {
  border-color: rgba(45, 212, 191, 0.2);
}

[data-theme="dark"] .plan-badge--accent {
  border-color: rgba(244, 162, 97, 0.25);
}

[data-theme="dark"] .plan-input {
  background: var(--plan-input-bg);
  color: var(--plan-text);
}

[data-theme="dark"] .plan-table th {
  background: var(--plan-surface-alt);
}

[data-theme="dark"] .plan-sidebar {
  background: var(--plan-surface);
  border-color: var(--plan-border);
}

[data-theme="dark"] .plan-section {
  background: var(--plan-surface);
  border-color: var(--plan-border);
}

[data-theme="dark"] .plan-callout {
  background: var(--plan-surface-alt);
}

[data-theme="dark"] .plan-sheet__panel {
  box-shadow: 0 -16px 48px rgba(0, 0, 0, 0.5);
}

/* --- Theme toggle --- */
.plan-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.plan-theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--plan-text-muted);
  cursor: pointer;
  font-family: inherit;
  flex-shrink: 0;
  transition: color 0.25s var(--plan-ease), transform 0.15s var(--plan-ease), opacity 0.25s var(--plan-ease);
}

.plan-theme-toggle:hover {
  color: var(--plan-primary);
  background: transparent;
  box-shadow: none;
}

.plan-theme-toggle:active {
  transform: scale(0.94);
}

.plan-theme-toggle.is-dark {
  background: transparent;
  border: none;
  color: var(--plan-primary);
  box-shadow: none;
}

[data-theme="dark"] .plan-theme-toggle.is-dark {
  box-shadow: none;
}

.plan-theme-toggle__icon {
  display: block;
  width: 20px;
  height: 20px;
  line-height: 1;
}

.plan-theme-toggle__icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.plan-theme-toggle__icon--moon {
  display: none;
}

.plan-theme-toggle.is-dark .plan-theme-toggle__icon--sun {
  display: none;
}

.plan-theme-toggle.is-dark .plan-theme-toggle__icon--moon {
  display: block;
}

/* Sheet row variant */
.plan-sheet__theme-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--plan-border);
}

.plan-sheet__theme-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--plan-text);
}

.plan-sheet__theme-hint {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--plan-text-muted);
  margin-top: 2px;
}

.plan-theme-toggle--pill {
  width: auto;
  height: auto;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
}

.plan-theme-toggle--pill .plan-theme-toggle__icon {
  width: 16px;
  height: 16px;
}

/* --- UI polish --- */
.plan-section {
  box-shadow: var(--plan-shadow-sm);
}

.plan-checklist-group--card {
  transition: box-shadow 0.25s var(--plan-ease), transform 0.2s var(--plan-ease);
}

.plan-checklist-group--card:hover {
  box-shadow: var(--plan-shadow);
}

.plan-today-block {
  transition: box-shadow 0.25s var(--plan-ease);
}

.plan-today-block:hover {
  box-shadow: var(--plan-shadow);
}

.plan-section-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 8px 0 16px;
  padding: 0 4px;
}

.plan-section-divider__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--plan-border-strong), transparent);
}

.plan-section-divider__label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--plan-text-muted);
  white-space: nowrap;
}

.plan-daily-card {
  border: 1px solid var(--plan-border);
}

.plan-progress-bar {
  overflow: hidden;
  border-radius: 999px;
  background: var(--plan-surface-alt);
}

.plan-progress-bar__fill {
  border-radius: 999px;
}

.plan-date-nav {
  background: var(--plan-surface);
  border: 1px solid var(--plan-border);
  box-shadow: var(--plan-shadow-sm);
}

.plan-recipe__body {
  background: var(--plan-surface);
}

@media (prefers-reduced-motion: reduce) {
  html:not(.plan-no-theme-transition) body.plan-page,
  html:not(.plan-no-theme-transition) .plan-header,
  html:not(.plan-no-theme-transition) .plan-bottom-nav,
  html:not(.plan-no-theme-transition) .plan-section,
  html:not(.plan-no-theme-transition) .plan-checklist-group--card,
  html:not(.plan-no-theme-transition) .plan-today-block,
  html:not(.plan-no-theme-transition) .plan-progress-status,
  html:not(.plan-no-theme-transition) .plan-daily-card,
  html:not(.plan-no-theme-transition) .plan-weight-form--card,
  html:not(.plan-no-theme-transition) .plan-sheet__panel,
  html:not(.plan-no-theme-transition) .plan-input {
    transition: none;
  }
}