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

:root {
  --bg-primary: #0f1419;
  --bg-secondary: #1a1f28;
  --bg-card: #242b36;
  --border: #2f3845;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --shadow: rgba(0, 0, 0, 0.3);
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

/* Header */
header {
  text-align: center;
  padding: 40px 20px 60px;
}

header h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Search Bar */
.search-section {
  max-width: 600px;
  margin: 0 auto 40px;
}

.search-box {
  position: relative;
  display: flex;
  gap: 12px;
}

.search-input {
  flex: 1;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

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

.search-btn, .location-btn {
  padding: 16px 24px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
  white-space: nowrap;
}

.search-btn:hover, .location-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

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

.location-btn {
  background: var(--bg-card);
  border: 2px solid var(--border);
  color: var(--text-secondary);
}

.location-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--accent);
  color: var(--text-primary);
}

/* Loading State */
.loading {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

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

/* Error State */
.error-message {
  max-width: 500px;
  margin: 40px auto;
  padding: 20px 24px;
  background: rgba(239, 68, 68, 0.1);
  border: 2px solid var(--error);
  border-radius: 12px;
  color: var(--error);
  text-align: center;
  font-weight: 500;
}

/* Main Weather Card */
.weather-main {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-card));
  border: 2px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 30px;
  box-shadow: 0 10px 40px var(--shadow);
}

.weather-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 30px;
}

.location-info h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.location-info .country {
  color: var(--text-secondary);
  font-size: 1rem;
}

.weather-date {
  text-align: right;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.weather-current {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 40px;
  align-items: center;
}

.temp-display {
  font-size: 5rem;
  font-weight: 800;
  line-height: 1;
  display: flex;
  align-items: flex-start;
}

.temp-display .unit {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 8px;
}

.weather-icon-main {
  font-size: 5rem;
  text-align: center;
  margin-bottom: 10px;
}

.weather-description {
  font-size: 1.4rem;
  font-weight: 600;
  text-transform: capitalize;
  margin-bottom: 4px;
}

.feels-like {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Weather Details Grid */
.weather-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.detail-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  transition: border-color 0.3s, transform 0.3s;
}

.detail-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.detail-card .label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.detail-card .icon {
  font-size: 1.2rem;
}

.detail-card .value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.detail-card .subtext {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Forecast Section */
.forecast-section {
  margin-top: 30px;
}

.forecast-section h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-left: 4px;
}

.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.forecast-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  transition: border-color 0.3s, transform 0.3s;
}

.forecast-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.forecast-card .day {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.forecast-card .icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.forecast-card .temps {
  display: flex;
  justify-content: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 600;
}

.forecast-card .temp-max {
  color: var(--text-primary);
}

.forecast-card .temp-min {
  color: var(--text-muted);
}

/* Hidden State */
.hidden {
  display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
  .weather-current {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .temp-display {
    justify-content: center;
  }

  .weather-header {
    text-align: center;
  }

  .weather-date {
    text-align: center;
  }

  .search-box {
    flex-direction: column;
  }

  .forecast-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }
}