/* ========================================
   Design Tokens
   ======================================== */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Fonts */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Work Sans', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-default: 960px;
  --content-wide: 1200px;
}

/* ========================================
   Light Mode (default)
   ======================================== */

:root, [data-theme="light"] {
  --color-bg:             #fafaf8;
  --color-surface:        #ffffff;
  --color-surface-offset: #f3f2ee;
  --color-divider:        #e8e6e1;
  --color-border:         #dddbd5;

  --color-text:           #1a1a1a;
  --color-text-muted:     #6b6b67;
  --color-text-faint:     #a3a29e;

  --color-primary:        #d97706;
  --color-primary-hover:  #b45309;
  --color-primary-light:  #fef3c7;
  --color-primary-subtle: #fffbeb;

  --color-tag-meal-bg:    #e0f2fe;
  --color-tag-meal-text:  #0369a1;
  --color-tag-cuisine-bg: #f3e8ff;
  --color-tag-cuisine-text: #7c3aed;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.1);
}

/* ========================================
   Dark Mode
   ======================================== */

[data-theme="dark"] {
  --color-bg:             #141413;
  --color-surface:        #1c1c1a;
  --color-surface-offset: #222220;
  --color-divider:        #2d2d2a;
  --color-border:         #3a3a36;

  --color-text:           #e5e5e0;
  --color-text-muted:     #8a8a84;
  --color-text-faint:     #5c5c58;

  --color-primary:        #f59e0b;
  --color-primary-hover:  #fbbf24;
  --color-primary-light:  #292218;
  --color-primary-subtle: #1e1b14;

  --color-tag-meal-bg:    #172554;
  --color-tag-meal-text:  #93c5fd;
  --color-tag-cuisine-bg: #2e1065;
  --color-tag-cuisine-text: #c4b5fd;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #141413;
    --color-surface:        #1c1c1a;
    --color-surface-offset: #222220;
    --color-divider:        #2d2d2a;
    --color-border:         #3a3a36;
    --color-text:           #e5e5e0;
    --color-text-muted:     #8a8a84;
    --color-text-faint:     #5c5c58;
    --color-primary:        #f59e0b;
    --color-primary-hover:  #fbbf24;
    --color-primary-light:  #292218;
    --color-primary-subtle: #1e1b14;
    --color-tag-meal-bg:    #172554;
    --color-tag-meal-text:  #93c5fd;
    --color-tag-cuisine-bg: #2e1065;
    --color-tag-cuisine-text: #c4b5fd;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
  }
}

/* ========================================
   Layout
   ======================================== */

body {
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  max-width: var(--content-wide);
  width: 100%;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5);
}

/* ========================================
   Header
   ======================================== */

.site-header {
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-icon {
  color: var(--color-primary);
  flex-shrink: 0;
}

.site-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.recipe-count {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 400;
}

[data-theme-toggle] {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

[data-theme-toggle]:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* ========================================
   Filters
   ======================================== */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.filter-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.pill {
  font-size: var(--text-sm);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  white-space: nowrap;
  font-weight: 400;
}

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

.pill.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  font-weight: 500;
}

/* ========================================
   Recipe Grid
   ======================================== */

.recipe-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

/* ========================================
   Recipe Card
   ======================================== */

.recipe-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow var(--transition-interactive),
              border-color var(--transition-interactive),
              transform 200ms ease;
}

.recipe-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border);
  transform: translateY(-2px);
}

.card-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-surface-offset);
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}

.recipe-card:hover .card-thumb img {
  transform: scale(1.03);
}

.play-icon {
  position: absolute;
  bottom: var(--space-3);
  right: var(--space-3);
  background: rgba(0,0,0,0.7);
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-icon svg {
  color: #fff;
  width: 16px;
  height: 16px;
}

.card-body {
  padding: var(--space-4) var(--space-5);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  margin-bottom: var(--space-2);
  color: var(--color-text);
  line-height: 1.3;
}

.card-channel {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.meta-item svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.card-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.tag {
  font-size: var(--text-xs);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.tag-meal {
  background: var(--color-tag-meal-bg);
  color: var(--color-tag-meal-text);
}

.tag-cuisine {
  background: var(--color-tag-cuisine-bg);
  color: var(--color-tag-cuisine-text);
}

/* ========================================
   Modal
   ======================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  transform: translateY(16px);
  transition: transform 250ms cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid var(--color-divider);
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  z-index: 10;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.modal-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.modal-content {
  padding: var(--space-6) var(--space-8);
}

.modal-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  margin-bottom: var(--space-1);
  color: var(--color-text);
}

.modal-channel {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.modal-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-divider);
  align-items: center;
}

.modal-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.modal-meta-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.video-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.video-link:hover {
  color: var(--color-primary-hover);
}

.modal-section-title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.ingredient-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6) 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-2);
}

.ingredient-list li {
  font-size: var(--text-base);
  color: var(--color-text);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
  max-width: none;
}

.instruction-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: steps;
}

.instruction-list li {
  counter-increment: steps;
  font-size: var(--text-base);
  color: var(--color-text);
  padding: var(--space-3) 0;
  padding-left: var(--space-10);
  position: relative;
  border-bottom: 1px solid var(--color-divider);
  max-width: none;
}

.instruction-list li:last-child {
  border-bottom: none;
}

.instruction-list li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: var(--space-3);
  width: 28px;
  height: 28px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 600;
}

/* ========================================
   Shopping List Checkbox on Card
   ======================================== */

.card-checkbox-area {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  margin-top: var(--space-3);
  border-top: 1px solid var(--color-divider);
}

.card-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  user-select: none;
  padding: var(--space-1) 0;
}

.card-checkbox:hover {
  color: var(--color-primary);
}

.card-checkbox input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: background var(--transition-interactive),
              border-color var(--transition-interactive);
}

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

.card-checkbox input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 6px;
  height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.card-checkbox input[type="checkbox"]:hover {
  border-color: var(--color-primary);
}

/* ========================================
   Shopping Button & Badge
   ======================================== */

.shopping-btn {
  position: relative;
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.shopping-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.shopping-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 16px;
  height: 16px;
  background: var(--color-primary);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  border-radius: var(--radius-full);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  line-height: 1;
}

.shopping-badge.visible {
  display: flex;
}

/* ========================================
   Shopping Modal
   ======================================== */

.shopping-modal {
  max-width: 560px;
}

.shopping-modal-body {
  padding: var(--space-8);
}

.shopping-modal-title {
  margin-bottom: var(--space-1);
}

.shopping-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
}

.shopping-category-group {
  margin-bottom: var(--space-6);
}

.shopping-category-name {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-primary);
}

.shopping-items {
  list-style: none;
  padding: 0;
  margin: 0;
}

.shopping-items li {
  font-size: var(--text-base);
  color: var(--color-text);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  max-width: none;
}

.shopping-items li:last-child {
  border-bottom: none;
}

.shopping-item-bullet {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  flex-shrink: 0;
}

.shopping-item-text {
  flex: 1;
}

.shopping-source-tag {
  font-size: var(--text-xs);
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 1px var(--space-2);
  border-radius: var(--radius-full);
  white-space: nowrap;
  font-weight: 500;
  flex-shrink: 0;
}

.shopping-empty {
  text-align: center;
  padding: var(--space-10) var(--space-5);
  color: var(--color-text-faint);
  font-size: var(--text-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.shopping-clear-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  margin-top: var(--space-4);
  cursor: pointer;
}

.shopping-clear-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ========================================
   Empty State
   ======================================== */

.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-5);
  color: var(--color-text-faint);
  font-size: var(--text-lg);
}

/* ========================================
   Footer
   ======================================== */

footer {
  text-align: center;
  padding: var(--space-8) var(--space-5);
  border-top: 1px solid var(--color-divider);
  margin-top: var(--space-12);
}

footer a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

footer a:hover {
  color: var(--color-text-muted);
}

/* ========================================
   Responsive
   ======================================== */

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

  .modal-content {
    padding: var(--space-5);
  }

  .filters {
    flex-direction: column;
    gap: var(--space-3);
  }

  .ingredient-list {
    grid-template-columns: 1fr;
  }
}