/* Modern Moon Tracker - Clean & Elegant Design */

:root {
  /* Modern Color Palette */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Neutrals - Clean & Modern */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  
  /* Effects */
  --radius: 0.75rem;
  --radius-sm: 0.5rem;
  --radius-lg: 1rem;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 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);
  
  /* Transitions */
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

/* ─── Header ────────────────────────────────────────────────────── */
header {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--border-light);
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Weather Display */
.weather-display {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: white;
  min-width: 200px;
  transition: var(--transition);
}

.weather-display:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.weather-icon {
  font-size: 2.5rem;
  line-height: 1;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.weather-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.weather-temp {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
}

.weather-condition {
  font-size: 0.875rem;
  opacity: 0.95;
  font-weight: 500;
}

/* ─── Controls ──────────────────────────────────────────────────── */
.observation-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.observation-controls label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.observation-controls input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-primary);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
}

.observation-controls input:hover {
  border-color: var(--primary-light);
}

.observation-controls input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* Location Search */
.location-search-wrapper {
  display: flex;
  gap: var(--spacing-sm);
  align-items: stretch;
}

.location-search-wrapper .search-container {
  flex: 1;
}

.location-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
}

.location-input:hover {
  border-color: var(--primary-light);
}

.location-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.current-location-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

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

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

.current-location-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Selected Place */
.selected-place {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  margin-top: var(--spacing-sm);
  transition: var(--transition);
  min-height: 3.5rem;
}

.selected-place:hover {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(139, 92, 246, 0.12) 100%);
}

.place-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  line-height: 1;
}

.place-name {
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
  text-align: left;
  word-break: break-word;
}

.clear-button {
  margin-left: auto;
  background: rgba(239, 68, 68, 0.1);
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--error);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  line-height: 1;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.clear-button:hover {
  background: var(--error);
  color: white;
  transform: scale(1.1);
}

/* ─── Sections ──────────────────────────────────────────────────── */
section {
  margin-bottom: var(--spacing-2xl);
}

section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.01em;
}

/* ─── Cards ─────────────────────────────────────────────────────── */
.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.card strong {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.card .value {
  font-size: 1.25rem;
  font-weight: 700;
  margin: var(--spacing-sm) 0;
  color: var(--text-primary);
  min-height: 1.5em;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card .sub-info {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-top: 0.25rem;
}

.card .value.loading::after {
  content: '';
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: 0.5rem;
}

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

/* ─── Visibility Grid ───────────────────────────────────────────── */
.moon-grid,
.visibility-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: 0;
}

.visibility-grid .card {
  padding: var(--spacing-md);
}

.visibility-grid .card strong {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xs);
}

.visibility-grid .card .value {
  font-size: 1.125rem;
  margin: var(--spacing-xs) 0;
}

.visibility-grid .card .sub-info {
  font-size: 0.75rem;
}

/* ─── Map Section ───────────────────────────────────────────────── */
.map-section {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

#map {
  width: 100%;
  height: 500px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-tertiary);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border);
}

.leaflet-container {
  background: var(--bg-tertiary);
}

/* ─── Timeline ─────────────────────────────────────────────────── */
.timeline-container {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

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

.timeline-header h3 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.timeline-time {
  font-weight: 700;
  color: var(--primary);
  font-size: 1.125rem;
}

.timeline-wrapper {
  position: relative;
  margin: var(--spacing-lg) 0 var(--spacing-md);
}

.timeline-track {
  position: relative;
  height: 60px;
  background: linear-gradient(to right, #1a1a2e 0%, #16213e 50%, #1a1a2e 100%);
  border-radius: var(--radius-sm);
  border: 2px solid rgba(255, 255, 255, 0.1);
  overflow: visible;
}

.timeline-track::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    to right,
    transparent,
    transparent calc(100% / 24 - 1px),
    rgba(255, 255, 255, 0.1) calc(100% / 24 - 1px),
    rgba(255, 255, 255, 0.1) calc(100% / 24)
  );
  pointer-events: none;
}

.timeline-hour-marker {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: rgba(255, 255, 255, 0.3);
  transform: translateX(-50%);
}

.timeline-hour-marker.major {
  background: rgba(255, 255, 255, 0.5);
}

.timeline-hour-label {
  position: absolute;
  top: -20px;
  transform: translateX(-50%);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  white-space: nowrap;
}

.timeline-sun-moon {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.timeline-sun,
.timeline-moon {
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  top: 50%;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
  border: 2px solid white;
  transition: left 0.3s ease;
}

.timeline-sun {
  background: #ffd700;
  z-index: 10;
}

.timeline-moon {
  background: #c0c0c0;
  z-index: 9;
}

.timeline-slider {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  width: 100%;
  height: 4px;
  margin: 0;
  transform: translateY(-50%);
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
  z-index: 20;
}

.timeline-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid white;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.timeline-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: var(--primary-dark);
}

.timeline-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid white;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.timeline-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
  background: var(--primary-dark);
}

.timeline-controls {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-md);
}

.timeline-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

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

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

.timeline-btn.playing {
  background: var(--success);
}

/* ─── Celestial Times Grid ──────────────────────────────────────── */
/* Removed - sun/moon times are now part of visibility-grid */

/* ─── Map Legend ────────────────────────────────────────────────── */
.map-legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.legend-card {
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.legend-card strong {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

/* ─── Explanation Box ───────────────────────────────────────────── */
#explanation-box {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.explanation-header {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.explanation-grid {
  display: grid;
  gap: var(--spacing-md);
}

.explanation-item {
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.explanation-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.explanation-item strong {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

/* ─── Responsive Design ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }

  header {
    padding: var(--spacing-lg);
  }

  .header-top {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-md);
  }

  h1 {
    font-size: 1.75rem;
    justify-content: center;
  }
  
  .weather-display {
    justify-content: center;
    width: 100%;
  }
  
  .observation-controls {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .location-search-wrapper {
    flex-direction: column;
  }
  
  .location-search-wrapper .current-location-btn {
    width: 100%;
  }

  .moon-grid,
  .visibility-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  .map-section {
    padding: var(--spacing-md);
  }

  #map {
    height: 400px;
  }

  .location-input {
    font-size: 16px; /* Prevents zoom on iOS */
  }
}

@media (max-width: 480px) {
  .moon-grid,
  .visibility-grid {
    grid-template-columns: 1fr;
  }

  .timeline-container {
    padding: var(--spacing-md);
  }
  
  .timeline-track {
    height: 50px;
  }
  
  .timeline-sun,
  .timeline-moon {
    width: 20px;
    height: 20px;
  }
  
  .timeline-hour-label {
    font-size: 0.65rem;
    top: -18px;
  }
}

/* ─── Reduced Motion ────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  
  .value.loading::after {
    animation: none;
  }
  
  .timeline-sun,
  .timeline-moon {
    transition: none;
  }
}