/* ==========================================================================
   Greek Meal Planner PWA — style.css
   Mobile-first, custom CSS, production-ready
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties
   ========================================================================== */

:root {
  /* Colors — Core */
  --color-primary: #2d6a4f;
  --color-primary-light: #40916c;
  --color-primary-dark: #1b4332;
  --color-secondary: #e76f51;
  --color-secondary-light: #f4845f;
  --color-secondary-dark: #c95b3e;

  /* Colors — Surfaces */
  --color-bg: #fefae0;
  --color-card: #ffffff;
  --color-card-shadow: rgba(0, 0, 0, 0.08);

  /* Colors — Text */
  --color-text: #1a1a2e;
  --color-text-light: #6b7280;
  --color-text-inverse: #ffffff;

  /* Colors — Semantic */
  --color-fasting: #7c3aed;
  --color-fasting-light: #ede9fe;
  --color-shared: #d8f3dc;
  --color-shared-border: #52b788;
  --color-danger: #ef4444;
  --color-success: #22c55e;

  /* Colors — Meal types */
  --color-breakfast: #f59e0b;
  --color-snack-am: #84cc16;
  --color-lunch: #e76f51;
  --color-snack-pm: #06b6d4;
  --color-dinner: #6366f1;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Layout */
  --header-height: 56px;
  --bottom-nav-height: 64px;
  --card-radius: 12px;
  --radius-sm: 6px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Safe areas (PWA) */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

/* ==========================================================================
   2. Dark Mode
   ========================================================================== */

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a2e;
    --color-card: #262640;
    --color-card-shadow: rgba(0, 0, 0, 0.3);
    --color-text: #f0f0f5;
    --color-text-light: #9ca3af;
    --color-primary: #52b788;
    --color-primary-light: #74c69d;
    --color-primary-dark: #40916c;
    --color-secondary: #f4845f;
    --color-fasting-light: #2e1065;
    --color-shared: #1b4332;
    --color-shared-border: #40916c;
  }
}

/* ==========================================================================
   3. Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  height: 100%;
  height: 100dvh;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  height: 100%;
  height: 100dvh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: var(--font-size-base);
}

img {
  max-width: 100%;
  display: block;
}

/* ==========================================================================
   4. App Shell
   ========================================================================== */

.app {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--color-bg);
}

.app-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: var(--space-md);
  padding-top: calc(var(--header-height) + var(--safe-top) + var(--space-md));
  padding-bottom: calc(var(--bottom-nav-height) + var(--safe-bottom) + var(--space-md));
}

/* PWA standalone adjustments */
@media all and (display-mode: standalone) {
  .app-content,
  .views-container {
    padding-top: calc(var(--header-height) + var(--safe-top) + var(--space-md));
    padding-bottom: calc(var(--bottom-nav-height) + var(--safe-bottom) + var(--space-md));
  }

  #app,
  #main-app {
    height: 100%;
    min-height: 100dvh;
    max-height: 100dvh;
  }

  .bottom-nav {
    padding-bottom: var(--safe-bottom);
  }
}

/* ==========================================================================
   5. Header
   ========================================================================== */

.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: calc(var(--header-height) + var(--safe-top));
  padding-top: var(--safe-top);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: calc(var(--safe-left) + var(--space-md));
  padding-right: calc(var(--safe-right) + var(--space-md));
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.header-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
}

.header-date {
  font-size: var(--font-size-xs);
  opacity: 0.85;
  line-height: 1.2;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ==========================================================================
   6. User Toggle (pill-style, 3 states)
   ========================================================================== */

.user-toggle {
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-pill);
  padding: 2px;
  position: relative;
}

.toggle-btn {
  position: relative;
  z-index: 1;
  padding: 4px 12px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-pill);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.toggle-btn.active {
  color: var(--color-primary-dark);
}

.user-toggle__indicator {
  position: absolute;
  top: 2px;
  bottom: 2px;
  background-color: var(--color-text-inverse);
  border-radius: var(--radius-pill);
  transition: transform var(--transition-base), width var(--transition-base);
  z-index: 0;
}

/* ==========================================================================
   7. Bottom Navigation
   ========================================================================== */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: calc(var(--bottom-nav-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background-color: var(--color-card);
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: stretch;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.06);
}

@media (prefers-color-scheme: dark) {
  .bottom-nav {
    border-top-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
  }
}

.nav-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

.nav-tab.active {
  color: var(--color-primary);
}

.nav-tab.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 0 0 3px 3px;
  animation: tab-indicator-in var(--transition-base) ease;
}

@keyframes tab-indicator-in {
  from {
    width: 0;
    opacity: 0;
  }
  to {
    width: 32px;
    opacity: 1;
  }
}

.nav-icon, .bottom-nav__icon {
  font-size: 1.35rem;
  line-height: 1;
}

.nav-label, .bottom-nav__label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
}

/* ==========================================================================
   8. View Container & Transitions
   ========================================================================== */

.view {
  display: none;
  animation: view-enter var(--transition-base) ease;
}

.view.active {
  display: block;
}

@keyframes view-enter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Slide transitions for tab switches */
.view--slide-left {
  animation: slide-in-left var(--transition-base) ease;
}

.view--slide-right {
  animation: slide-in-right var(--transition-base) ease;
}

@keyframes slide-in-left {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slide-in-right {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ==========================================================================
   9. Fasting Banner
   ========================================================================== */

.fasting-banner {
  background: linear-gradient(135deg, var(--color-fasting), #6d28d9);
  color: var(--color-text-inverse);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--card-radius);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.fasting-banner__icon {
  font-size: var(--font-size-lg);
}

/* ==========================================================================
   10. Meal Cards
   ========================================================================== */

.meal-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.meal-card {
  background-color: var(--color-card);
  border-radius: var(--card-radius);
  box-shadow: 0 1px 4px var(--color-card-shadow), 0 4px 12px var(--color-card-shadow);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  animation: card-appear var(--transition-base) ease both;
}

.meal-card:nth-child(1) { animation-delay: 0ms; }
.meal-card:nth-child(2) { animation-delay: 50ms; }
.meal-card:nth-child(3) { animation-delay: 100ms; }
.meal-card:nth-child(4) { animation-delay: 150ms; }
.meal-card:nth-child(5) { animation-delay: 200ms; }

@keyframes card-appear {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.meal-card:active {
  transform: scale(0.98);
}

/* Shared meal card */
.meal-card--shared {
  border-left: 4px solid var(--color-shared-border);
  background-color: var(--color-shared);
}

@media (prefers-color-scheme: dark) {
  .meal-card--shared {
    background-color: var(--color-shared);
  }
}

/* Fasting meal card */
.meal-card--fasting {
  border-left: 4px solid var(--color-fasting);
  opacity: 0.7;
}

/* Meal card header — colored strip */
.meal-card__header {
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.meal-card__header--breakfast { background-color: rgba(245, 158, 11, 0.12); }
.meal-card__header--snack-am  { background-color: rgba(132, 204, 22, 0.12); }
.meal-card__header--lunch     { background-color: rgba(231, 111, 81, 0.12); }
.meal-card__header--snack-pm  { background-color: rgba(6, 182, 212, 0.12); }
.meal-card__header--dinner    { background-color: rgba(99, 102, 241, 0.12); }

.meal-card__body {
  padding: var(--space-md);
}

.meal-card__name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
}

.meal-card__description {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

.meal-card__footer {
  padding: var(--space-sm) var(--space-md);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

@media (prefers-color-scheme: dark) {
  .meal-card__footer {
    border-top-color: rgba(255, 255, 255, 0.05);
  }
}

/* ==========================================================================
   11. Meal Type Badges
   ========================================================================== */

.meal-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.meal-badge--breakfast {
  background-color: var(--color-breakfast);
  color: #fff;
}

.meal-badge--snack-am {
  background-color: var(--color-snack-am);
  color: #fff;
}

.meal-badge--lunch {
  background-color: var(--color-lunch);
  color: #fff;
}

.meal-badge--snack-pm {
  background-color: var(--color-snack-pm);
  color: #fff;
}

.meal-badge--dinner {
  background-color: var(--color-dinner);
  color: #fff;
}

/* ==========================================================================
   12. Time Display
   ========================================================================== */

.time-display {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: var(--font-weight-normal);
  white-space: nowrap;
}

/* ==========================================================================
   13. Portion Info (two columns: Χ | Α)
   ========================================================================== */

.portion-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.portion-col {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background-color: rgba(0, 0, 0, 0.02);
}

@media (prefers-color-scheme: dark) {
  .portion-col {
    background-color: rgba(255, 255, 255, 0.04);
  }
}

.portion-col__label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.portion-col__value {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* ==========================================================================
   14. Week View
   ========================================================================== */

.week-view {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.week-view__day-header {
  text-align: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  padding: var(--space-xs) 0;
  text-transform: uppercase;
}

.week-view__day-header--today {
  color: var(--color-primary);
}

.week-view__cell {
  background-color: var(--color-card);
  border-radius: var(--radius-sm);
  padding: 4px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  text-align: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  overflow: hidden;
  word-break: break-word;
}

.week-view__cell:active {
  transform: scale(0.92);
}

.week-view__cell--filled {
  background-color: rgba(45, 106, 79, 0.08);
}

.week-view__cell--today {
  box-shadow: inset 0 0 0 2px var(--color-primary);
}

.week-view__cell--fasting {
  background-color: var(--color-fasting-light);
}

.week-view__cell--shared {
  background-color: var(--color-shared);
}

/* Meal row labels */
.week-view__meal-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  text-align: right;
  padding-right: var(--space-xs);
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

/* Week view with labels: needs extra column */
.week-view--with-labels {
  grid-template-columns: auto repeat(7, 1fr);
}

/* ==========================================================================
   15. Report View
   ========================================================================== */

.report-section {
  margin-bottom: var(--space-xl);
}

.report-section__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.stat-card {
  background-color: var(--color-card);
  border-radius: var(--card-radius);
  box-shadow: 0 1px 4px var(--color-card-shadow);
  padding: var(--space-md);
  text-align: center;
}

.stat-card__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.stat-card__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: var(--space-xs);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

/* ==========================================================================
   16. Settings View
   ========================================================================== */

.settings-group {
  margin-bottom: var(--space-xl);
}

.settings-group__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.settings-item {
  background-color: var(--color-card);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
  .settings-item {
    border-bottom-color: rgba(255, 255, 255, 0.05);
  }
}

.settings-item:first-child {
  border-radius: var(--card-radius) var(--card-radius) 0 0;
}

.settings-item:last-child {
  border-radius: 0 0 var(--card-radius) var(--card-radius);
  border-bottom: none;
}

.settings-item:only-child {
  border-radius: var(--card-radius);
  border-bottom: none;
}

.settings-item__label {
  font-weight: var(--font-weight-medium);
}

.settings-item__value {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

/* ==========================================================================
   17. Auth Screen
   ========================================================================== */

.auth-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  z-index: 1000;
  padding: var(--space-xl);
}

.auth-card {
  background-color: var(--color-card);
  border-radius: var(--card-radius);
  box-shadow: 0 4px 24px var(--color-card-shadow);
  padding: var(--space-xl);
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.auth-card__title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-xs);
  color: var(--color-primary);
}

.auth-card__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
}

.auth-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  text-align: center;
  letter-spacing: 0.2em;
  transition: border-color var(--transition-fast);
  background-color: var(--color-bg);
  color: var(--color-text);
}

.auth-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.auth-input--error {
  border-color: var(--color-danger);
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  50% { transform: translateX(8px); }
  75% { transform: translateX(-4px); }
}

.auth-btn {
  width: 100%;
  padding: 12px;
  margin-top: var(--space-md);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  transition: background-color var(--transition-fast);
}

.auth-btn:active {
  background-color: var(--color-primary-dark);
}

.auth-error {
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  margin-top: var(--space-sm);
  min-height: 1.25rem;
}

/* ==========================================================================
   18. Loading & Empty States
   ========================================================================== */

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) var(--space-md);
  color: var(--color-text-light);
  gap: var(--space-md);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(0, 0, 0, 0.1);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@media (prefers-color-scheme: dark) {
  .loading-spinner {
    border-color: rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-primary);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-state__text {
  font-size: var(--font-size-sm);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) var(--space-md);
  text-align: center;
  color: var(--color-text-light);
}

.empty-state__icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.empty-state__message {
  font-size: var(--font-size-sm);
  max-width: 280px;
}

/* ==========================================================================
   19. Toggle Switch (for settings)
   ========================================================================== */

.toggle-switch {
  position: relative;
  width: 48px;
  height: 28px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-switch__track {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.15);
  border-radius: var(--radius-pill);
  transition: background-color var(--transition-fast);
  cursor: pointer;
}

.toggle-switch input:checked + .toggle-switch__track {
  background-color: var(--color-primary);
}

.toggle-switch__thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background-color: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-fast);
  pointer-events: none;
}

.toggle-switch input:checked ~ .toggle-switch__thumb {
  transform: translateX(20px);
}

/* ==========================================================================
   20. Buttons (general)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.96);
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn--primary:active {
  background-color: var(--color-primary-dark);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--danger {
  background-color: var(--color-danger);
  color: var(--color-text-inverse);
}

.btn--sm {
  padding: 6px 12px;
  font-size: var(--font-size-xs);
}

.btn--block {
  width: 100%;
}

/* ==========================================================================
   21. Responsive — Tablet (768px+)
   ========================================================================== */

@media (min-width: 768px) {
  .meal-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .auth-card {
    padding: var(--space-2xl);
  }
}

/* ==========================================================================
   22. Responsive — Desktop (1024px+)
   ========================================================================== */

@media (min-width: 1024px) {
  /* Move nav to sidebar */
  .bottom-nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: auto;
    width: 220px;
    height: 100%;
    flex-direction: column;
    padding: 0;
    padding-top: calc(var(--header-height) + var(--safe-top) + var(--space-xl));
    padding-bottom: var(--space-xl);
    border-top: none;
    border-right: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.04);
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--space-xs);
  }

  @media (prefers-color-scheme: dark) {
    .bottom-nav {
      border-right-color: rgba(255, 255, 255, 0.08);
    }
  }

  .nav-tab {
    flex: none;
    flex-direction: row;
    justify-content: flex-start;
    padding: var(--space-sm) var(--space-lg);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-right: var(--space-md);
  }

  .nav-tab.active::before {
    top: 50%;
    left: 0;
    right: auto;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    border-radius: 0 3px 3px 0;
  }

  .nav-tab.active {
    background-color: rgba(45, 106, 79, 0.08);
  }

  .bottom-nav__icon {
    font-size: var(--font-size-lg);
  }

  .bottom-nav__label {
    font-size: var(--font-size-sm);
  }

  /* Adjust content for sidebar */
  .app-content {
    padding-left: calc(220px + var(--space-xl));
    padding-right: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .app-header {
    left: 220px;
  }

  .meal-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   23. Utility Classes
   ========================================================================== */

.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;
}

.text-center { text-align: center; }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-light { color: var(--color-text-light); }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-fasting { color: var(--color-fasting); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }

.hidden { display: none !important; }

/* ==========================================================================
   24. Print Styles
   ========================================================================== */

@media print {
  .app-header,
  .bottom-nav,
  .auth-screen {
    display: none !important;
  }

  .app-content {
    padding: 0 !important;
    overflow: visible !important;
    position: static !important;
  }

  .app {
    position: static;
    overflow: visible;
  }

  .meal-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ==========================================================================
   25. Compat — Maps actual HTML class names to styles
   ========================================================================== */

/* App layout */
#app {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--color-bg);
}

#app {
  height: 100%;
  height: 100dvh;
}

#main-app {
  display: flex;
  flex-direction: column;
  height: 100%;
  height: 100dvh;
  overflow: hidden;
}

/* Views container */
.views-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: var(--space-md);
  padding-top: calc(var(--header-height) + var(--safe-top) + var(--space-md));
  padding-bottom: calc(var(--bottom-nav-height) + var(--safe-bottom) + var(--space-md));
}

/* Header structure */
.header-top {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.app-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
}

/* View header with day/week nav */
.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  gap: var(--space-sm);
}

.view-header h2 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  flex: 1;
}

.nav-day, .nav-week {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-card);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-lg);
  box-shadow: 0 1px 3px var(--color-card-shadow);
  transition: background-color var(--transition-fast);
}

.nav-day:active, .nav-week:active {
  background-color: rgba(0, 0, 0, 0.05);
}

/* Fasting banner */
.fasting-icon {
  font-size: var(--font-size-lg);
}

/* Meals list */
.meals-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Meal card header (actual class names from today.js) */
.meal-card-header {
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.meal-type--breakfast { background-color: rgba(245, 158, 11, 0.12); }
.meal-type--mid_morning { background-color: rgba(132, 204, 22, 0.12); }
.meal-type--lunch { background-color: rgba(231, 111, 81, 0.12); }
.meal-type--afternoon { background-color: rgba(6, 182, 212, 0.12); }
.meal-type--dinner { background-color: rgba(99, 102, 241, 0.12); }

.meal-type-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.meal-time {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

.shared-badge {
  font-size: var(--font-size-xs);
  background-color: var(--color-shared-border);
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-weight: var(--font-weight-medium);
}

.meal-card-body {
  padding: var(--space-md);
}

/* Split view (two users side by side) */
.meal-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.meal-user {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background-color: rgba(0, 0, 0, 0.02);
}

@media (prefers-color-scheme: dark) {
  .meal-user {
    background-color: rgba(255, 255, 255, 0.04);
  }
}

.user-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: var(--space-xs);
}

.meal-name {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
}

.meal-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

/* Shared meal view */
.meal-shared .meal-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-sm);
}

.meal-portions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.portion {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background-color: rgba(0, 0, 0, 0.02);
}

@media (prefers-color-scheme: dark) {
  .portion {
    background-color: rgba(255, 255, 255, 0.04);
  }
}

.portion-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  background-color: rgba(45, 106, 79, 0.1);
  width: 24px;
  height: 24px;
  line-height: 24px;
  text-align: center;
  border-radius: 50%;
  margin-bottom: var(--space-xs);
}

.portion-text {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

/* Card enter animation */
.card-enter {
  animation: card-appear var(--transition-base) ease both;
}

/* Week grid (actual class names from week.js) */
.week-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-x: auto;
}

.week-header, .week-row {
  display: grid;
  grid-template-columns: 60px repeat(7, 1fr);
  gap: 2px;
}

.week-cell {
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  text-align: center;
  padding: 2px 4px;
}

.week-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  text-align: right;
  padding-right: var(--space-xs);
  justify-content: flex-end;
}

.week-day-header {
  flex-direction: column;
  gap: 2px;
  padding: var(--space-xs) 0;
  cursor: pointer;
}

.week-day-name {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  text-transform: uppercase;
}

.week-day-num {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.week-fasting-dot {
  font-size: 0.6rem;
}

.week-meal-cell {
  background-color: var(--color-card);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  overflow: hidden;
  word-break: break-word;
}

.week-meal-cell:active {
  background-color: rgba(0, 0, 0, 0.05);
}

.week-meal-cell.is-today {
  box-shadow: inset 0 0 0 2px var(--color-primary);
}

.week-meal-cell.is-shared {
  background-color: var(--color-shared);
}

.week-day-header.is-today .week-day-name,
.week-day-header.is-today .week-day-num {
  color: var(--color-primary);
}

.week-day-header.is-fasting .week-day-name {
  color: var(--color-fasting);
}

.week-meal-name {
  font-size: 0.65rem;
  line-height: 1.2;
}

/* Reference view */
.ref-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.ref-tab {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  background-color: var(--color-card);
  transition: all var(--transition-fast);
}

.ref-tab.active {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.ref-section {
  margin-bottom: var(--space-xl);
}

.ref-section h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.ref-times {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-sm);
}

.ref-time {
  padding: var(--space-sm);
  background-color: var(--color-card);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

.ref-item {
  padding: var(--space-md);
  background-color: var(--color-card);
  border-radius: var(--card-radius);
  margin-bottom: var(--space-sm);
  box-shadow: 0 1px 3px var(--color-card-shadow);
}

.ref-item-name {
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
}

.ref-item-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

.ref-badge {
  display: inline-block;
  font-size: var(--font-size-xs);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background-color: rgba(0, 0, 0, 0.06);
  margin-top: var(--space-xs);
  margin-right: var(--space-xs);
}

.ref-badge--fasting {
  background-color: var(--color-fasting-light);
  color: var(--color-fasting);
}

.ref-day {
  margin-bottom: var(--space-lg);
  padding: var(--space-md);
  background-color: var(--color-card);
  border-radius: var(--card-radius);
  box-shadow: 0 1px 3px var(--color-card-shadow);
}

.ref-day h4 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.ref-meal {
  margin-bottom: var(--space-sm);
}

.ref-meal-type {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
}

.ref-meal-name {
  font-weight: var(--font-weight-medium);
}

.ref-meal-options {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.ref-meal-detail {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: var(--space-xs);
  padding-left: var(--space-md);
}

.ref-rules {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.ref-rule {
  font-size: var(--font-size-sm);
  padding: var(--space-sm);
  background-color: var(--color-card);
  border-radius: var(--radius-sm);
}

/* Settings list */
.settings-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.settings-list .setting-item {
  background-color: var(--color-card);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.settings-list .setting-item:first-child {
  border-radius: var(--card-radius) var(--card-radius) 0 0;
}

.settings-list .setting-item:last-child {
  border-radius: 0 0 var(--card-radius) var(--card-radius);
  border-bottom: none;
}

.setting-item.about {
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.setting-toggle {
  position: relative;
}

.setting-toggle input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 48px;
  height: 28px;
  background-color: rgba(0, 0, 0, 0.15);
  border-radius: var(--radius-pill);
  position: relative;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.setting-toggle input[type="checkbox"]::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background-color: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-fast);
}

.setting-toggle input[type="checkbox"]:checked {
  background-color: var(--color-primary);
}

.setting-toggle input[type="checkbox"]:checked::after {
  transform: translateX(20px);
}

/* Auth form */
#auth-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  z-index: 1000;
  padding: var(--space-xl);
}

.auth-card {
  background-color: var(--color-card);
  border-radius: var(--card-radius);
  box-shadow: 0 4px 24px var(--color-card-shadow);
  padding: var(--space-xl);
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.auth-card h1 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-xs);
  color: var(--color-primary);
}

.auth-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

.auth-card form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.auth-card input[type="password"] {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  text-align: center;
  letter-spacing: 0.2em;
  background-color: var(--color-bg);
  color: var(--color-text);
}

.auth-card input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  cursor: pointer;
}

.btn-primary:active {
  background-color: var(--color-primary-dark);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
}

.error {
  color: var(--color-danger);
  font-size: var(--font-size-sm);
}

/* Toggle active background */
.toggle-btn.active {
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-primary-dark);
  border-radius: var(--radius-pill);
}

/* Desktop sidebar: adjust views container */
@media (min-width: 1024px) {
  .views-container {
    margin-left: 220px;
    padding-bottom: var(--space-xl);
  }

  .app-header {
    left: 220px;
  }

  #fasting-banner {
    margin-left: 220px;
  }
}

/* Dark mode via data-theme attribute */
[data-theme="dark"] {
  --color-bg: #1a1a2e;
  --color-card: #262640;
  --color-card-shadow: rgba(0, 0, 0, 0.3);
  --color-text: #f0f0f5;
  --color-text-light: #9ca3af;
  --color-primary: #52b788;
  --color-primary-light: #74c69d;
  --color-primary-dark: #40916c;
  --color-secondary: #f4845f;
  --color-fasting-light: #2e1065;
  --color-shared: #1b4332;
  --color-shared-border: #40916c;
}