/* ============================================
   3×3 Diary - Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors - Light Mode */
  --bg: #FAFAFA;
  --bg-secondary: #F3F4F6;
  --surface: #FFFFFF;
  --surface-hover: #F9FAFB;
  --surface-active: #F3F4F6;
  --border: #E5E7EB;
  --border-light: #F3F4F6;

  --primary: #6366F1;
  --primary-hover: #5558E6;
  --primary-light: rgba(99, 102, 241, 0.1);
  --primary-lighter: rgba(99, 102, 241, 0.05);
  --secondary: #06B6D4;
  --secondary-light: rgba(6, 182, 212, 0.1);

  --success: #10B981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning: #F59E0B;
  --warning-light: rgba(245, 158, 11, 0.1);
  --danger: #EF4444;
  --danger-light: rgba(239, 68, 68, 0.1);

  --text: #1E1E2E;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --text-inverse: #FFFFFF;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 6px;
  --radius: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --nav-height: 64px;
  --header-height: 56px;
  --max-width: 640px;
  --sidebar-width: 240px;
}

/* Dark Mode */
[data-theme="dark"] {
  --bg: #0F0F14;
  --bg-secondary: #161622;
  --surface: #1A1A24;
  --surface-hover: #222233;
  --surface-active: #2A2A3C;
  --border: #2A2A3C;
  --border-light: #222233;

  --primary: #818CF8;
  --primary-hover: #929BF9;
  --primary-light: rgba(129, 140, 248, 0.15);
  --primary-lighter: rgba(129, 140, 248, 0.05);
  --secondary: #22D3EE;
  --secondary-light: rgba(34, 211, 238, 0.15);

  --success: #34D399;
  --success-light: rgba(52, 211, 153, 0.15);
  --warning: #FBBF24;
  --warning-light: rgba(251, 191, 36, 0.15);
  --danger: #F87171;
  --danger-light: rgba(248, 113, 113, 0.15);

  --text: #E4E4F0;
  --text-secondary: #9CA3AF;
  --text-tertiary: #6B7280;
  --text-inverse: #0F0F14;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* --- Loading Screen --- */
.loading-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  z-index: 9999;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-logo {
  text-align: center;
  animation: fadeInUp 0.6s ease;
}

.loading-icon {
  font-size: 48px;
  display: block;
  margin-bottom: var(--space-md);
  animation: pulse 2s infinite;
}

.loading-logo h1 {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.loading-logo p {
  color: var(--text-secondary);
  margin-top: var(--space-sm);
  font-size: 14px;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  margin: var(--space-lg) auto 0;
  animation: spin 0.8s linear infinite;
}

/* --- App Layout --- */
#app {
  min-height: 100dvh;
}

.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.app-header h1 {
  font-size: 18px;
  font-weight: 600;
  flex: 1;
}

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

.app-content {
  flex: 1;
  padding: var(--space-md);
  padding-bottom: calc(var(--nav-height) + var(--space-lg));
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

/* --- Bottom Navigation --- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--surface);
  border-top: 1px solid var(--border);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 0 var(--space-sm);
  padding-bottom: env(safe-area-inset-bottom, 0);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  color: var(--text-tertiary);
  font-size: 10px;
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
  min-width: 56px;
  position: relative;
}

.nav-item .nav-icon {
  font-size: 22px;
  line-height: 1;
  transition: transform var(--transition);
}

.nav-item:hover {
  color: var(--text-secondary);
}

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

.nav-item.active .nav-icon {
  transform: scale(1.1);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--primary);
  border-radius: 0 0 var(--radius-full) var(--radius-full);
}

/* --- Login Page --- */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: var(--space-xl);
  background: var(--bg);
}

.login-card {
  text-align: center;
  max-width: 400px;
  width: 100%;
  animation: fadeInUp 0.6s ease;
}

.login-logo {
  font-size: 64px;
  margin-bottom: var(--space-lg);
  display: block;
}

.login-card h1 {
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

.login-card .subtitle {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.login-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  text-align: left;
}

.login-feature {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.login-feature .feature-icon {
  font-size: 28px;
  flex-shrink: 0;
}

.login-feature .feature-text h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}

.login-feature .feature-text p {
  font-size: 12px;
  color: var(--text-secondary);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--primary-light);
  color: var(--primary);
}

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

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: var(--surface-hover);
  border-color: var(--primary);
  color: var(--primary);
}

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

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

.btn-google {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 14px 28px;
  font-size: 15px;
  border-radius: var(--radius-md);
  width: 100%;
  box-shadow: var(--shadow-sm);
}

.btn-google:hover {
  background: var(--surface-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-google .google-icon {
  width: 20px;
  height: 20px;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-secondary);
  transition: all var(--transition);
}

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

/* --- Cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.card-header h2 {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.card-header h3 {
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* --- Date Navigation --- */
.date-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
}

.date-nav .date-text {
  font-size: 16px;
  font-weight: 600;
  min-width: 180px;
  text-align: center;
  cursor: pointer;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius);
  transition: background var(--transition);
}

.date-nav .date-text:hover {
  background: var(--surface-hover);
}

.date-nav .date-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.date-nav .date-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.date-nav .today-badge {
  font-size: 11px;
  color: var(--primary);
  font-weight: 500;
}

/* --- Sections --- */
.section {
  margin-bottom: var(--space-lg);
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* --- Form Elements --- */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.form-hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: var(--space-xs);
}

.form-row {
  display: flex;
  gap: var(--space-md);
}

.form-row > * {
  flex: 1;
}

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

.input-suffix {
  font-size: 14px;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* --- Mood Selector --- */
.mood-selector {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  padding: var(--space-md) 0;
}

.mood-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
  min-width: 80px;
  background: var(--surface);
}

.mood-option:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.mood-option.selected {
  border-color: var(--primary);
  background: var(--primary-light);
}

.mood-option .mood-emoji {
  font-size: 32px;
  transition: transform var(--transition);
}

.mood-option.selected .mood-emoji {
  transform: scale(1.2);
}

.mood-option .mood-label {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* --- Status Checks --- */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: var(--space-sm);
}

.status-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}

.status-item:hover {
  background: var(--surface-hover);
  transform: translateY(-1px);
}

.status-item.completed {
  background: var(--success-light);
  border-color: var(--success);
}

.status-item .status-icon {
  font-size: 24px;
}

.status-item .status-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.status-item.completed .status-label {
  color: var(--success);
}

/* --- Nutrition Bar --- */
.nutrition-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.nutrition-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nutrition-label {
  font-size: 13px;
  font-weight: 600;
  min-width: 50px;
  color: var(--text-secondary);
}

.nutrition-bar {
  flex: 1;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.nutrition-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
  background: var(--primary);
}

.nutrition-bar-fill.over {
  background: var(--danger);
}

.nutrition-bar-fill.warning {
  background: var(--warning);
}

.nutrition-value {
  font-size: 13px;
  font-weight: 500;
  min-width: 90px;
  text-align: right;
  color: var(--text-secondary);
}

/* --- Meal List --- */
.meal-slot {
  margin-bottom: var(--space-lg);
}

.meal-slot-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--space-sm);
}

.meal-slot-header h3 {
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.meal-slot-total {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.meal-item {
  display: flex;
  align-items: center;
  padding: var(--space-sm) 0;
  gap: var(--space-sm);
  border-bottom: 1px solid var(--border-light);
}

.meal-item:last-child {
  border-bottom: none;
}

.meal-item .processing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.meal-item .processing-dot.level-1 { background: var(--success); }
.meal-item .processing-dot.level-2 { background: var(--warning); }
.meal-item .processing-dot.level-3 { background: var(--danger); }

.meal-item .meal-name {
  flex: 1;
  font-size: 14px;
}

.meal-item .meal-amount {
  font-size: 12px;
  color: var(--text-tertiary);
}

.meal-item .meal-cal {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 60px;
  text-align: right;
}

.meal-item .meal-actions {
  display: flex;
  gap: 2px;
}

.add-food-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-tertiary);
  font-size: 13px;
  transition: all var(--transition);
  margin-top: var(--space-sm);
}

.add-food-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-lighter);
}

/* --- Exercise --- */
.exercise-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  background: var(--surface);
}

.exercise-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.exercise-header h3 {
  font-size: 15px;
  font-weight: 600;
}

.exercise-header .exercise-meta {
  font-size: 12px;
  color: var(--text-tertiary);
}

.exercise-item {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-light);
}

.exercise-item:last-child {
  border-bottom: none;
}

.exercise-item .exercise-name {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.exercise-sets {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.set-badge {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

/* --- Sleep --- */
.sleep-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-xl) 0;
}

.sleep-duration {
  font-size: 48px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sleep-duration-unit {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

.sleep-times {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.sleep-time-item {
  text-align: center;
}

.sleep-time-item .time-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-xs);
}

.sleep-time-item .time-value {
  font-size: 20px;
  font-weight: 600;
}

.sleep-arrow {
  font-size: 20px;
  color: var(--text-tertiary);
}

/* --- Quality Selector --- */
.quality-selector {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

.quality-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
  background: var(--surface);
}

.quality-option:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.quality-option.selected {
  border-color: var(--primary);
  background: var(--primary-light);
}

.quality-option .quality-emoji {
  font-size: 28px;
}

.quality-option .quality-label {
  font-size: 11px;
  color: var(--text-secondary);
}

/* --- Toast --- */
#toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-md);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  animation: slideInRight 0.3s ease;
  max-width: 360px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info { border-left: 3px solid var(--primary); }

.toast.removing {
  animation: slideOutRight 0.3s ease forwards;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.modal-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  width: 100%;
  max-width: 500px;
  max-height: 85dvh;
  overflow-y: auto;
  padding: var(--space-lg);
  animation: slideUp 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-secondary);
  transition: all var(--transition);
}

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

/* --- Food Search Modal --- */
.search-input-wrapper {
  position: relative;
  margin-bottom: var(--space-md);
}

.search-input-wrapper .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  color: var(--text-tertiary);
}

.search-input-wrapper input {
  padding-left: 38px;
}

.food-search-results {
  max-height: 300px;
  overflow-y: auto;
}

.food-result-item {
  display: flex;
  align-items: center;
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: background var(--transition);
  gap: var(--space-sm);
}

.food-result-item:hover {
  background: var(--surface-hover);
}

.food-result-item .food-info {
  flex: 1;
}

.food-result-item .food-info .food-name {
  font-size: 14px;
  font-weight: 500;
}

.food-result-item .food-info .food-detail {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* --- Strong Import --- */
.strong-import-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
}

.strong-import-area:hover, .strong-import-area.active {
  border-color: var(--primary);
  background: var(--primary-lighter);
}

.strong-import-area textarea {
  width: 100%;
  min-height: 150px;
  border: none;
  background: transparent;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 13px;
}

.strong-import-area textarea:focus {
  box-shadow: none;
}

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

.settings-group h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-light);
}

.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-light);
}

.setting-item:last-child {
  border-bottom: none;
}

.setting-info h3 {
  font-size: 14px;
  font-weight: 500;
}

.setting-info p {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* --- Theme Toggle --- */
.theme-toggle {
  display: flex;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.theme-toggle-btn {
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.theme-toggle-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

/* --- Setup Page --- */
.setup-page {
  max-width: 480px;
  margin: 0 auto;
  padding: var(--space-xl);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.setup-step {
  animation: fadeInUp 0.4s ease;
}

.setup-step h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.setup-step p {
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.setup-progress {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.setup-progress-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--border);
  transition: all var(--transition);
}

.setup-progress-dot.active {
  background: var(--primary);
  width: 24px;
}

.setup-progress-dot.done {
  background: var(--success);
}

/* --- Sync Status --- */
.sync-status {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 12px;
  color: var(--text-tertiary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
}

.sync-status.synced { color: var(--success); }
.sync-status.syncing { color: var(--warning); }
.sync-status.error { color: var(--danger); }

.sync-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.sync-status.syncing .sync-dot {
  animation: pulse 1s infinite;
}

/* --- Dashboard --- */
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

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

.week-chart {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  height: 120px;
  padding: var(--space-md) 0;
  gap: var(--space-sm);
}

.week-bar {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  height: 100%;
}

.week-bar .bar-container {
  flex: 1;
  width: 100%;
  max-width: 32px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.week-bar .bar-fill {
  width: 100%;
  background: var(--primary);
  border-radius: var(--radius-sm);
  transition: height 0.5s ease;
  min-height: 2px;
}

.week-bar .bar-label {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.week-bar .bar-value {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 3px;
  margin-bottom: var(--space-lg);
}

.tab-btn {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  text-align: center;
}

.tab-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-tertiary);
}

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state p {
  font-size: 14px;
  margin-bottom: var(--space-md);
}

/* --- Calendar Heatmap (simple) --- */
.calendar-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
  margin-bottom: var(--space-sm);
}

.calendar-day {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

.calendar-day:hover {
  transform: scale(1.1);
}

.calendar-day.today {
  border: 2px solid var(--primary);
}

.calendar-day.has-entry {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.calendar-day.complete {
  background: var(--success-light);
  color: var(--success);
}

.calendar-day-labels {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
  margin-bottom: var(--space-xs);
}

.calendar-day-labels span {
  text-align: center;
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* --- Responsive --- */
@media (min-width: 768px) {
  .app-layout {
    flex-direction: row;
  }

  .bottom-nav {
    position: static;
    flex-direction: column;
    width: var(--sidebar-width);
    height: 100dvh;
    border-top: none;
    border-right: 1px solid var(--border);
    justify-content: flex-start;
    padding: var(--space-lg) var(--space-md);
    gap: var(--space-sm);
    position: sticky;
    top: 0;
  }

  .nav-item {
    flex-direction: row;
    width: 100%;
    justify-content: flex-start;
    padding: var(--space-md);
    font-size: 14px;
    gap: var(--space-md);
    border-radius: var(--radius);
    min-width: auto;
  }

  .nav-item.active::after {
    display: none;
  }

  .nav-item.active {
    background: var(--primary-light);
  }

  .app-content {
    padding-bottom: var(--space-lg);
    padding: var(--space-xl);
  }

  .modal {
    border-radius: var(--radius-lg);
    margin: auto;
  }

  .modal-overlay {
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .app-content {
    padding: var(--space-2xl);
  }

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

/* --- Utility --- */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-secondary { color: var(--text-secondary); }
.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); }
.w-full { width: 100%; }