/* =============================================
   SCREENSNAP - DESIGN SYSTEM TOKENS
   ============================================= */

:root {
  /* Colors - Primary */
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-200: #c7d2fe;
  --color-primary-300: #a5b4fc;
  --color-primary-400: #818cf8;
  --color-primary-500: #6366f1;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-primary-800: #3730a3;
  --color-primary-900: #312e81;

  /* Colors - Neutral */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Colors - Semantic */
  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-danger: #ef4444;
  --color-danger-light: #fee2e2;
  --color-info: #3b82f6;
  --color-info-light: #dbeafe;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --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;
  --font-size-3xl: 1.875rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* 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;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --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);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

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

  /* Z-Index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 500;
  --z-toast: 600;
  --z-tooltip: 700;
}

/* =============================================
   BASE STYLES
   ============================================= */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background: var(--color-gray-50);
  min-height: 100vh;
}

.hidden {
  display: none !important;
}

/* =============================================
   APP CONTAINER
   ============================================= */

.app-container {
  max-width: 480px;
  margin: 0 auto;
  background: white;
  min-height: 100vh;
  position: relative;
  box-shadow: var(--shadow-xl);
}

/* =============================================
   HEADER
   ============================================= */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-4);
  background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
  color: white;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

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

.logo-icon {
  width: 28px;
  height: 28px;
}

.app-header h1 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
}

.header-right {
  display: flex;
  gap: var(--space-2);
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  color: white;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.2);
}

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

/* =============================================
   SEARCH BAR
   ============================================= */

.search-container {
  padding: var(--space-4);
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
}

.search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: white;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.search-bar:focus-within {
  border-color: var(--color-primary-400);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

.search-bar svg {
  width: 20px;
  height: 20px;
  color: var(--color-gray-400);
  flex-shrink: 0;
}

.search-bar input {
  flex: 1;
  border: none;
  outline: none;
  font-size: var(--font-size-base);
  color: var(--color-gray-900);
}

.search-bar input::placeholder {
  color: var(--color-gray-400);
}

.search-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-close:hover {
  background: var(--color-gray-200);
}

.search-results {
  margin-top: var(--space-4);
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: white;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-2);
}

.search-result-item img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.search-result-text {
  flex: 1;
}

.search-result-text strong {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-gray-900);
}

.search-result-text span {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

/* =============================================
   STORAGE BANNER
   ============================================= */

.storage-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--color-gray-100);
  border-bottom: 1px solid var(--color-gray-200);
}

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

.storage-count {
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-800);
}

.storage-size {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-gray-300);
}

.btn-cleanup {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-danger-light);
  color: var(--color-danger);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-cleanup:hover {
  background: var(--color-danger);
  color: white;
}

.btn-cleanup svg {
  width: 16px;
  height: 16px;
}

/* =============================================
   CATEGORY TABS
   ============================================= */

.category-tabs {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  background: white;
  border-bottom: 1px solid var(--color-gray-200);
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-gray-100);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  min-width: 72px;
}

.tab:hover {
  background: var(--color-gray-200);
}

.tab.active {
  background: var(--color-primary-50);
  border-color: var(--color-primary-200);
}

.tab-icon {
  font-size: var(--font-size-lg);
}

.tab-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

.tab.active .tab-label {
  color: var(--color-primary-700);
}

.tab-count {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  background: var(--color-gray-200);
  padding: 2px 6px;
  border-radius: var(--radius-full);
}

.tab.active .tab-count {
  background: var(--color-primary-200);
  color: var(--color-primary-700);
}

/* =============================================
   GALLERY
   ============================================= */

.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-1);
  padding: var(--space-1);
  padding-bottom: 100px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  background: var(--color-gray-200);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item .item-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2);
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.gallery-item:hover .item-overlay {
  opacity: 1;
}

.item-category {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

.item-expiry {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  background: var(--color-warning);
  color: white;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.item-expiry svg {
  width: 12px;
  height: 12px;
}

/* =============================================
   CAPTURE NOTIFICATION
   ============================================= */

.capture-notification {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--space-4);
}

.notification-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.notification-card {
  position: relative;
  width: 100%;
  max-width: 400px;
  background: white;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  animation: slideUp 0.3s ease;
  box-shadow: var(--shadow-2xl);
}

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

.notification-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
  color: white;
}

.notification-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
}

.notification-icon svg {
  width: 24px;
  height: 24px;
}

.notification-title h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: 2px;
}

.notification-title p {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.notification-preview {
  padding: var(--space-4);
  background: var(--color-gray-50);
}

.notification-preview img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.ai-tag {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.ai-badge {
  padding: 2px 6px;
  background: linear-gradient(135deg, var(--color-primary-500) 0%, #8b5cf6 100%);
  color: white;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
}

.notification-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
  padding: var(--space-4);
}

.action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  background: white;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.action-btn svg {
  width: 24px;
  height: 24px;
}

.action-btn span {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

.action-btn:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-300);
}

.action-btn.keep {
  color: var(--color-success);
  border-color: var(--color-success-light);
  background: var(--color-success-light);
}

.action-btn.keep:hover {
  background: var(--color-success);
  color: white;
}

.action-btn.keep:hover span {
  color: white;
}

.action-btn.timer {
  color: var(--color-info);
  border-color: var(--color-info-light);
  background: var(--color-info-light);
}

.action-btn.timer:hover {
  background: var(--color-info);
  color: white;
}

.action-btn.timer:hover span {
  color: white;
}

.action-btn.day {
  color: var(--color-warning);
  border-color: var(--color-warning-light);
  background: var(--color-warning-light);
}

.action-btn.day:hover {
  background: var(--color-warning);
  color: white;
}

.action-btn.day:hover span {
  color: white;
}

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

.action-btn.delete:hover {
  background: var(--color-danger);
  color: white;
}

.action-btn.delete:hover span {
  color: white;
}

.notification-dismiss {
  width: 100%;
  padding: var(--space-3);
  background: var(--color-gray-100);
  border: none;
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.notification-dismiss:hover {
  background: var(--color-gray-200);
}

/* =============================================
   CLEANUP MODAL
   ============================================= */

.cleanup-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--space-4);
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: white;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  animation: scaleIn 0.2s ease;
  box-shadow: var(--shadow-2xl);
}

@keyframes scaleIn {
  from {
    transform: scale(0.95);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.modal-header h2 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-gray-100);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-gray-200);
}

.modal-close svg {
  width: 18px;
  height: 18px;
  color: var(--color-gray-500);
}

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

.cleanup-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.cleanup-stat {
  text-align: center;
  padding: var(--space-3);
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
}

.stat-value {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-600);
}

.stat-label {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

.cleanup-categories h3 {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.cleanup-category {
  margin-bottom: var(--space-2);
}

.cleanup-category label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.cleanup-category label:hover {
  background: var(--color-gray-100);
}

.cleanup-category input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary-600);
}

.category-info {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cat-icon {
  font-size: var(--font-size-lg);
}

.cat-name {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
}

.cat-count {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

.modal-footer {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-gray-50);
  border-top: 1px solid var(--color-gray-200);
}

.btn-secondary,
.btn-primary {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary {
  background: white;
  border: 1px solid var(--color-gray-300);
  color: var(--color-gray-700);
}

.btn-secondary:hover {
  background: var(--color-gray-50);
}

.btn-primary {
  background: var(--color-danger);
  border: none;
  color: white;
}

.btn-primary:hover {
  background: #dc2626;
}

/* =============================================
   DEMO FAB
   ============================================= */

.demo-fab {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.demo-fab:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.demo-fab svg {
  width: 20px;
  height: 20px;
}

/* =============================================
   TOAST
   ============================================= */

.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-gray-800);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-toast);
  animation: toastIn 0.3s ease;
}

@keyframes toastIn {
  from {
    transform: translateX(-50%) translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
  }
}

.toast svg {
  width: 18px;
  height: 18px;
  color: var(--color-success);
}

/* =============================================
   EMPTY STATE
   ============================================= */

.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-4);
  text-align: center;
}

.empty-state svg {
  width: 64px;
  height: 64px;
  color: var(--color-gray-300);
  margin-bottom: var(--space-4);
}

.empty-state h3 {
  font-size: var(--font-size-lg);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.empty-state p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 480px) {
  .app-container {
    box-shadow: none;
  }

  .demo-fab {
    right: var(--space-4);
    bottom: var(--space-4);
  }

  .demo-fab span {
    display: none;
  }

  .demo-fab {
    padding: var(--space-4);
  }
}

/* =============================================
   FOCUS STATES (Accessibility)
   ============================================= */

:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

button:focus:not(:focus-visible) {
  outline: none;
}