style.css

/* CSS Variables for Theme Management */
:root {
  --primary-color: #667eea;
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-color: #764ba2;
  --accent-color: #f093fb;
  --background-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --card-background: rgba(255, 255, 255, 0.1);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.8);
  --text-muted: rgba(255, 255, 255, 0.6);
  --border-color: rgba(255, 255, 255, 0.2);
  --shadow-light: 0 8px 32px rgba(31, 38, 135, 0.37);
  --shadow-medium: 0 15px 35px rgba(31, 38, 135, 0.5);
  --border-radius: 16px;
  --border-radius-small: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --background-gradient: linear-gradient(135deg, #0c0c0c 0%, #1a1a1a 100%);
  --card-background: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.8);
  --text-muted: rgba(255, 255, 255, 0.5);
  --border-color: rgba(255, 255, 255, 0.1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --background-gradient: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
  --card-background: rgba(255, 255, 255, 0.2);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.9);
  --text-muted: rgba(255, 255, 255, 0.7);
  --border-color: rgba(255, 255, 255, 0.3);
}

/* Weather-based backgrounds */
.weather-clear {
  --background-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.weather-clouds {
  --background-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.weather-rain {
  --background-gradient: linear-gradient(135deg, #43cea2 0%, #185a9d 100%);
}

.weather-snow {
  --background-gradient: linear-gradient(135deg, #e6ddd4 0%, #d5d4d0 100%);
  --text-primary: #2c3e50;
  --text-secondary: #34495e;
  --text-muted: #7f8c8d;
}

.weather-thunderstorm {
  --background-gradient: linear-gradient(135deg, #2c3e50 0%, #4a6741 100%);
}

.weather-mist, .weather-fog {
  --background-gradient: linear-gradient(135deg, #bdc3c7 0%, #2c3e50 100%);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--background-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: var(--transition);
  position: relative;
}

/* Particle Background */
#particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
}

.particle {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  pointer-events: none;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
    opacity: 0.1;
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
    opacity: 0.3;
  }
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  position: relative;
  z-index: 1;
}

/* Header */
.header {
  margin-bottom: 2rem;
  animation: fadeInDown 0.8s ease-out;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(20px);
  background: var(--card-background);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-light);
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

.logo i {
  background: linear-gradient(45deg, #f093fb, #f5576c);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: pulse 2s ease-in-out infinite;
}

.header-controls {
  display: flex;
  gap: 1rem;
}

.theme-toggle {
  background: var(--card-background);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.75rem;
  border-radius: var(--border-radius-small);
  cursor: pointer;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

/* Search Section */
.search-section {
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.search-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.search-box {
  position: relative;
  width: 100%;
  max-width: 500px;
}

.search-box input {
  width: 100%;
  padding: 1rem 4rem 1rem 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--card-background);
  backdrop-filter: blur(20px);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 500;
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(240, 147, 251, 0.1);
  transform: translateY(-2px);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary-gradient);
  border: none;
  padding: 0.75rem;
  border-radius: var(--border-radius-small);
  color: white;
  cursor: pointer;
  transition: var(--transition);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-btn:hover {
  transform: translateY(-50%) scale(1.05);
  box-shadow: var(--shadow-medium);
}

.location-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--card-background);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.location-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.location-btn i {
  animation: spin 2s linear infinite;
}

.location-btn.loading i {
  animation: spin 1s linear infinite;
}

/* Suggestions */
.suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--card-background);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  margin-top: 0.5rem;
  z-index: 10;
  max-height: 200px;
  overflow-y: auto;
  box-shadow: var(--shadow-medium);
}

.suggestion-item {
  padding: 1rem 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 1px solid var(--border-color);
}

.suggestion-item:hover {
  background: rgba(255, 255, 255, 0.1);
}

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

/* Recent Searches */
.recent-searches {
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.recent-searches h3 {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-align: center;
}

.recent-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.recent-item {
  background: var(--card-background);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-small);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.875rem;
  font-weight: 500;
}

.recent-item:hover {
  background: var(--primary-gradient);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

/* Loading and Error States */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  text-align: center;
  animation: fadeIn 0.5s ease-out;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

.error {
  background: var(--card-background);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(231, 76, 60, 0.3);
  padding: 2rem;
  border-radius: var(--border-radius);
  text-align: center;
  margin: 2rem 0;
  animation: shake 0.5s ease-out;
}

.error i {
  font-size: 2rem;
  color: #e74c3c;
  margin-bottom: 1rem;
}

.hidden {
  display: none !important;
}

/* Weather Content */
.weather-content {
  animation: fadeInUp 0.8s ease-out;
}

/* Current Weather */
.current-weather {
  background: var(--card-background);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-light);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.current-info {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.location h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.location p {
  color: var(--text-secondary);
  font-weight: 500;
}

.temperature {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.temperature #currentTemp {
  font-size: 4rem;
  font-weight: 300;
  line-height: 1;
}

.temp-unit {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.5rem;
}

.unit-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.75rem;
  transition: var(--transition);
}

.unit-btn.active,
.unit-btn:hover {
  background: var(--primary-gradient);
  color: white;
  border-color: transparent;
}

.current-details {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 2rem;
}

.weather-icon {
  font-size: 5rem;
  text-align: center;
  animation: pulse 3s ease-in-out infinite;
}

.weather-icon i {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.detail-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-small);
  transition: var(--transition);
}

.detail-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.detail-item i {
  color: var(--accent-color);
  width: 20px;
  text-align: center;
}

.detail-item span:last-child {
  margin-left: auto;
  font-weight: 600;
}

.weather-description {
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.weather-description p {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: capitalize;
}

/* Chart Section */
.chart-section {
  background: var(--card-background);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-light);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.chart-section h3 {
  margin-bottom: 1.5rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-secondary);
}

.chart-container {
  position: relative;
  height: 300px;
}

/* Forecast Section */
.forecast-section {
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.forecast-section h3 {
  margin-bottom: 1.5rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-secondary);
}

.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.forecast-item {
  background: var(--card-background);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  box-shadow: var(--shadow-light);
  animation: fadeInUp 0.6s ease-out;
}

.forecast-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-medium);
  background: rgba(255, 255, 255, 0.15);
}

.forecast-date {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.forecast-icon {
  font-size: 2.5rem;
  margin: 1rem 0;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: bounce 2s ease-in-out infinite;
}

.forecast-temps {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.forecast-high {
  font-size: 1.25rem;
  font-weight: 700;
}

.forecast-low {
  color: var(--text-muted);
  font-weight: 500;
}

.forecast-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: capitalize;
}

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

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
  }
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

/* Ripple Effect */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transition: width 0.6s, height 0.6s;
  transform: translate(-50%, -50%);
  z-index: 0;
}

.ripple:active::before {
  width: 300px;
  height: 300px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 15px;
  }

  .header-content {
    padding: 1rem;
  }

  .logo {
    font-size: 1.5rem;
  }

  .search-container {
    flex-direction: column;
    align-items: stretch;
  }

  .current-info {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
  }

  .current-details {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .details-grid {
    grid-template-columns: 1fr;
  }

  .temperature #currentTemp {
    font-size: 3rem;
  }

  .weather-icon {
    font-size: 4rem;
  }

  .forecast-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
  }

  .forecast-item {
    padding: 1rem;
  }

  .chart-container {
    height: 250px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 10px;
  }

  .current-weather,
  .chart-section {
    padding: 1rem;
  }

  .temperature #currentTemp {
    font-size: 2.5rem;
  }

  .weather-icon {
    font-size: 3rem;
  }

  .forecast-item {
    padding: 0.75rem;
  }

  .forecast-icon {
    font-size: 2rem;
  }
}

/* Scroll Behavior */
html {
  scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--primary-gradient);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}

/* Focus Styles for Accessibility */
button:focus,
input:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  #particles,
  .search-section,
  .recent-searches,
  .theme-toggle {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}