/* ============================================
   WakeStop - Design System Tokens
   ============================================ */

:root {
  /* Colors - Primary */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  /* Colors - Success */
  --color-success-50: #ecfdf5;
  --color-success-500: #10b981;
  --color-success-600: #059669;

  /* Colors - Warning */
  --color-warning-50: #fffbeb;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;

  /* Colors - Danger */
  --color-danger-50: #fef2f2;
  --color-danger-500: #ef4444;
  --color-danger-600: #dc2626;

  /* 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;

  /* Typography */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Spacing Scale */
  --space-0: 0;
  --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: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

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

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-modal: 200;
  --z-toast: 300;
}

/* ============================================
   Base Styles
   ============================================ */

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

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

body {
  margin: 0;
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-gray-900);
  background-color: var(--color-gray-50);
}

/* ============================================
   App Shell
   ============================================ */

.app-shell {
  max-width: 430px;
  margin: 0 auto;
  min-height: 100vh;
  background: white;
  position: relative;
  box-shadow: var(--shadow-xl);
}

/* Status Bar Simulation */
.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--color-gray-900);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

.status-bar-time {
  font-weight: var(--font-semibold);
}

.status-bar-icons {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-4);
  background: white;
  border-bottom: 1px solid var(--color-gray-100);
}

.header-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.header-title h1 {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
}

.header-logo {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-lg);
}

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

.icon-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-600);
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: var(--color-gray-200);
  color: var(--color-gray-800);
}

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

/* Main Content */
.main-content {
  padding: var(--space-4);
  padding-bottom: 100px;
}

/* ============================================
   Alarm Card
   ============================================ */

.alarm-card {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-gray-100);
  margin-bottom: var(--space-4);
}

.alarm-card.active {
  border-color: var(--color-primary-200);
  background: linear-gradient(180deg, var(--color-primary-50), white);
}

.alarm-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
}

.alarm-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--color-gray-300);
}

.status-indicator.active {
  background: var(--color-success-500);
  animation: pulse 2s infinite;
}

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

.status-text {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-500);
}

.status-text.active {
  color: var(--color-success-600);
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  width: 52px;
  height: 28px;
}

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

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.toggle-slider::before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: var(--radius-full);
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--color-primary-500);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(24px);
}

.toggle-switch input:focus + .toggle-slider {
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

/* Destination Display */
.destination-display {
  text-align: center;
  padding: var(--space-6) 0;
}

.destination-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-3);
  background: var(--color-primary-100);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

.destination-name {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
  margin: 0 0 var(--space-1);
}

.destination-address {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin: 0;
}

/* Distance Info */
.distance-info {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-gray-100);
  margin-top: var(--space-4);
}

.distance-item {
  text-align: center;
}

.distance-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
}

.distance-value.highlight {
  color: var(--color-primary-600);
}

.distance-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   Quick Actions
   ============================================ */

.quick-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.quick-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.quick-action-btn:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.quick-action-icon {
  width: 44px;
  height: 44px;
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
}

.quick-action-btn:hover .quick-action-icon {
  background: var(--color-primary-100);
}

.quick-action-text {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
}

/* ============================================
   Saved Locations
   ============================================ */

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
  margin: 0;
}

.section-link {
  font-size: var(--text-sm);
  color: var(--color-primary-600);
  text-decoration: none;
  font-weight: var(--font-medium);
}

.section-link:hover {
  text-decoration: underline;
}

.saved-locations {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.location-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.location-item:hover {
  border-color: var(--color-primary-300);
  background: var(--color-primary-50);
}

.location-icon {
  width: 40px;
  height: 40px;
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.location-item:hover .location-icon {
  background: var(--color-primary-100);
}

.location-details {
  flex: 1;
  min-width: 0;
}

.location-name {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-900);
  margin: 0 0 var(--space-1);
}

.location-address {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.location-arrow {
  color: var(--color-gray-400);
  font-size: var(--text-lg);
}

/* ============================================
   Bottom Navigation
   ============================================ */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  background: white;
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: space-around;
  padding: var(--space-2) var(--space-4);
  padding-bottom: calc(var(--space-2) + env(safe-area-inset-bottom, 0));
  z-index: var(--z-dropdown);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
  border-radius: var(--radius-lg);
}

.nav-item:hover {
  color: var(--color-gray-700);
}

.nav-item.active {
  color: var(--color-primary-600);
}

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

.nav-icon {
  font-size: var(--text-xl);
}

.nav-label {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

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

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  width: 100%;
  max-width: 430px;
  background: white;
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  padding: var(--space-4);
  padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0));
  transform: translateY(100%);
  transition: transform var(--transition-slow);
}

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

.modal-handle {
  width: 36px;
  height: 4px;
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-4);
}

.search-input-wrapper {
  position: relative;
  margin-bottom: var(--space-4);
}

.search-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  padding-left: var(--space-10);
  font-size: var(--text-base);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-xl);
  background: var(--color-gray-50);
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary-500);
  background: white;
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

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

.search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  pointer-events: none;
}

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

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

.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-4);
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
  margin: 0 0 var(--space-2);
}

.empty-state-text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin: 0;
}

/* ============================================
   Toast Notification
   ============================================ */

.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-gray-900);
  color: white;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-toast);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.toast.visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  background: var(--color-success-600);
}

.toast.warning {
  background: var(--color-warning-600);
}

.toast.danger {
  background: var(--color-danger-600);
}

/* ============================================
   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-width: 0;
}

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

@media (max-width: 430px) {
  .app-shell {
    box-shadow: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --color-primary-500: #0055cc;
    --color-gray-500: #333333;
  }
}