:root {
  /* Color System */
  --color-primary: #3B82F6;
  --color-secondary: #14B8A6;
  --color-accent: #F97316;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  
  /* Light Theme */
--color-bg-primary: #FFFFFF;
--color-bg-secondary: #F8FAFC;
--color-bg-tertiary: #F1F5F9;
--color-text-primary: #0F172A;
--color-text-secondary: #475569;
--color-text-tertiary: #94A3B8;
--color-border: #E2E8F0;
--color-shadow: rgba(15, 23, 42, 0.1);

  
  /* Spacing System (8px base) */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  
  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, 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-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.3s ease;
}

/* Dark Theme */
.dark-theme {
  --color-bg-primary: #0F172A;
  --color-bg-secondary: #1E293B;
  --color-bg-tertiary: #334155;
  --color-text-primary: #F8FAFC;
  --color-text-secondary: #CBD5E1;
  --color-text-tertiary: #64748B;
  --color-border: #334155;
  --color-shadow: rgba(0, 0, 0, 0.3);
}

/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.app-container {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Background Animation */
.background-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  transition: opacity var(--transition-slow);
  background-image: url('/public/Sky video.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.1;
}

/* Header */
.header {
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  transition: all var(--transition-base);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.app-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header-controls {
  display: flex;
  gap: var(--spacing-sm);
}

.control-btn {
  width: 48px;
  height: 48px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
}

.control-btn:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

.unit-display {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

/* Search Section */
.search-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.search-container {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  align-items: center;
}

.search-form {
  flex: 1;
}

.search-input-container {
  position: relative;
  display: flex;
}

.search-input {
  flex: 1;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-lg);
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  transition: all var(--transition-base);
  border-right: none;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--color-border);
  border-left: none;
  border-radius: var(--radius-lg);
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  background: var(--color-primary);
  color: white;
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: var(--font-size-lg);
}

.search-btn:hover {
  background: #2563EB;
  transform: translateY(-1px);
}

.location-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--color-secondary);
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--color-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-base);
  white-space: nowrap;
}

.location-btn:hover {
  background: var(--color-secondary);
  color: white;
  transform: translateY(-1px);
}

/* Favorites */
.favorites-section {
  margin-top: var(--spacing-lg);
}

.favorites-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.favorites-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.favorite-item {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  position: relative;
}

.favorite-item:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-1px);
}

.favorite-remove {
  margin-left: var(--spacing-sm);
  color: var(--color-error);
  cursor: pointer;
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md) var(--spacing-2xl);
}

/* Loading State */
.loading {
  text-align: center;
  padding: var(--spacing-3xl) 0;
  display: none;
}

.loading.active {
  display: block;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Error State */
.error-state {
  text-align: center;
  padding: var(--spacing-3xl) 0;
  display: none;
}

.error-state.active {
  display: block;
}

.error-state i {
  font-size: var(--font-size-4xl);
  color: var(--color-error);
  margin-bottom: var(--spacing-lg);
}

.error-state h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.error-state p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.retry-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  color: white;
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: var(--font-size-base);
}

.retry-btn:hover {
  background: #2563EB;
  transform: translateY(-2px);
}

/* Weather Content */
.weather-content {
  display: none;
}

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

/* Current Weather */
.current-weather {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: 0 4px 6px var(--color-shadow);
  transition: all var(--transition-base);
}

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

.city-name {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.date-time {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
}

.favorite-btn {
  width: 48px;
  height: 48px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: var(--font-size-xl);
}

.favorite-btn:hover,
.favorite-btn.active {
  color: var(--color-error);
  transform: scale(1.1);
}

.favorite-btn.active i {
  font-weight: 900;
}

.weather-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
}

.temperature-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.current-temp {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--color-primary);
}

.weather-icon {
  font-size: var(--font-size-4xl);
  color: var(--color-accent);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.weather-description {
  text-align: right;
}

.condition {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text-primary);
  text-transform: capitalize;
  margin-bottom: var(--spacing-xs);
}

.feels-like {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
}

/* Weather Details Grid */
.weather-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.detail-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.detail-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--color-shadow);
}

.detail-card i {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  width: 24px;
  text-align: center;
}

.detail-info {
  flex: 1;
}

.detail-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.detail-value {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  word-break: break-word;
  overflow-wrap: break-word;
}

.uv-index {
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

.uv-low { background: var(--color-success); color: white; }
.uv-moderate { background: var(--color-warning); color: white; }
.uv-high { background: var(--color-error); color: white; }

/* Hourly Forecast */
.hourly-forecast {
  margin-bottom: var(--spacing-xl);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
}

.hourly-container {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: 0 4px 6px var(--color-shadow);
}

.hourly-scroll {
  display: flex;
  gap: var(--spacing-md);
  overflow-x: auto;
  padding-bottom: var(--spacing-sm);
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary) transparent;
}

.hourly-scroll::-webkit-scrollbar {
  height: 6px;
}

.hourly-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.hourly-scroll::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 3px;
}

.hourly-card {
  min-width: 120px;
  padding: var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition-base);
}

.hourly-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px var(--color-shadow);
}

.hourly-time {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.hourly-icon {
  font-size: var(--font-size-2xl);
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.hourly-temp {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}
/* Weekly Forecast */
.weekly-forecast {
  margin-bottom: 2rem;
}

.weekly-container {
  overflow-x: auto;
  padding: 1rem 0;
}

.weekly-list {
  display: flex;
  gap: 1rem;
  flex-wrap: nowrap;
  min-width: 100%;
}

.w.weekly-card i {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary); /* or use a brighter custom color */
}


.weekly-day {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.weekly-temp {
  font-size: 1.2rem;
  font-weight: bold;
}

.weekly-card i {
  font-size: 1.5rem;
  margin-bottom: 0.3rem;
  color: var(--color-text-tertiary);
}

/* Optional: style scrollbar */
.weekly-container::-webkit-scrollbar {
  height: 6px;
}

.weekly-container::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 4px;
}


/* Footer */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    padding: 0 var(--spacing-md);
  }
  
  .app-title {
    font-size: var(--font-size-xl);
  }
  
  .search-container {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .search-form {
    width: 100%;
  }
  
  .location-btn {
    align-self: stretch;
    justify-content: center;
  }
  
  .weather-main {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-lg);
  }
  
  .weather-description {
    text-align: center;
  }
  
  .current-temp {
    font-size: var(--font-size-4xl);
  }
  
  .weather-details {
    grid-template-columns: 1fr;
  }
  
  .hourly-card {
    min-width: 100px;
  }
  
}

@media (max-width: 480px) {
  .current-weather {
    padding: var(--spacing-lg);
  }
  
  .city-name {
    font-size: var(--font-size-2xl);
  }
  
  .current-temp {
    font-size: var(--font-size-3xl);
  }
  
  .weather-icon {
    font-size: var(--font-size-3xl);
  }
  
  .hourly-card {
    min-width: 80px;
    padding: var(--spacing-sm);
  }
  
  .favorites-list {
    gap: var(--spacing-xs);
  }
}

/* Animations */
.fade-in {
  animation: fadeIn 0.5s ease-out;
}

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

.slide-in {
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from { transform: translateX(-20px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}