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

:root {
  --color-bg: #f0f4f8;
  --color-surface: #ffffff;
  --color-primary: #1a6eb5;
  --color-primary-dark: #144f85;
  --color-text: #1a202c;
  --color-text-muted: #4a5568;
  --color-border: #e2e8f0;
  --color-error: #c53030;
  --color-error-bg: #fff5f5;
  --color-loading: #4a5568;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
}

/* Header */
.site-header {
  background: var(--color-primary);
  color: #fff;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow-md);
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.search-area {
  flex: 1;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.search-form {
  display: flex;
  gap: 0.5rem;
}

.search-input {
  flex: 1;
  padding: 0.5rem 0.875rem;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-size: 1rem;
  color: var(--color-text);
  background: #fff;
  outline: none;
  min-width: 0;
}
.search-input:focus { border-color: #90cdf4; }

.search-btn {
  padding: 0.5rem 1.25rem;
  background: var(--color-primary-dark);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.search-btn:hover { background: #0d3a63; }
.search-btn:focus-visible { outline: 2px solid #90cdf4; outline-offset: 2px; }

/* Main content */
.main-content {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.hidden { display: none !important; }

/* Welcome state */
.welcome-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--color-text-muted);
  font-size: 1.125rem;
}

/* Current conditions */
.conditions-panel {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.conditions-location {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.conditions-main {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.conditions-temp {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
}

.conditions-icon {
  width: 64px;
  height: 64px;
}

.conditions-description {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  flex: 1;
}

.conditions-details {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.conditions-detail-item {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.conditions-detail-label { font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; }

/* Section heading */
.section-heading {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

/* Forecast tabs */
.forecast-tabs {
  display: flex;
  margin-bottom: 1rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  width: fit-content;
}

.forecast-tab-btn {
  padding: 0.375rem 1.125rem;
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: none;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.forecast-tab-btn + .forecast-tab-btn {
  border-left: 1px solid var(--color-border);
}

.forecast-tab-btn.active {
  background: var(--color-primary);
  color: #fff;
}

.forecast-tab-btn:hover:not(.active) {
  background: var(--color-bg);
}

/* Forecast grid */
.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.75rem;
}

.forecast-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1rem 0.75rem;
  text-align: center;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  align-items: center;
}

.forecast-card-day {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.forecast-card-icon {
  width: 48px;
  height: 48px;
}

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

.forecast-card-temp-low {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.forecast-card-desc {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.3;
}

.forecast-card-precip {
  font-size: 0.75rem;
  color: var(--color-primary);
  font-weight: 600;
}

/* Hourly strip */
.hourly-strip {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.hour-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 0.75rem 0.625rem;
  text-align: center;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  align-items: center;
  min-width: 72px;
  flex-shrink: 0;
}

.hour-card-time {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.hour-card-icon {
  width: 36px;
  height: 36px;
}

.hour-card-temp {
  font-size: 1rem;
  font-weight: 700;
}

.hour-card-desc {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  line-height: 1.3;
}

.hour-card-precip {
  font-size: 0.7rem;
  color: var(--color-primary);
  font-weight: 600;
}

/* Loading state */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 4rem 1rem;
  color: var(--color-loading);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Error state */
.error-state {
  background: var(--color-error-bg);
  border: 1px solid #feb2b2;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  color: var(--color-error);
  font-size: 1rem;
}

/* Two-column layout */
.weather-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
  align-items: start;
}

.left-column {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.left-column .conditions-panel {
  margin-bottom: 0;
}

/* Map panel */
.map-panel {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  min-height: 400px;
  align-self: stretch;
}

#map {
  width: 100%;
  height: 100%;
  min-height: 400px;
}

/* Satellite controls */
.satellite-controls {
  display: flex;
  padding: 0.625rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.sat-btn {
  flex: 1;
  padding: 0.3rem 0;
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.sat-btn:first-child {
  border-radius: var(--radius) 0 0 var(--radius);
}

.sat-btn:last-child {
  border-radius: 0 var(--radius) var(--radius) 0;
}

.sat-btn + .sat-btn {
  border-left: none;
}

.sat-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.sat-btn:hover:not(.active) {
  background: var(--color-bg);
}

/* Geolocation button */
.geolocate-btn {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.geolocate-btn:hover {
  color: #fff;
}

.geolocate-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.map-unavailable {
  width: 100%;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  background: var(--color-border);
}

/* Alert banners */
#alerts-container {
  margin-bottom: 1rem;
}

.alert-banner {
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.alert-extreme .alert-header { background: #7f1d1d; color: #fef2f2; }
.alert-extreme .alert-body   { background: #fef2f2; color: #7f1d1d; }

.alert-moderate .alert-header { background: #92400e; color: #fff7ed; }
.alert-moderate .alert-body   { background: #fff7ed; color: #92400e; }

.alert-minor .alert-header { background: #713f12; color: #fefce8; }
.alert-minor .alert-body   { background: #fefce8; color: #713f12; }

.alert-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.875rem 1rem;
  background: none;
  border: none;
  color: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.alert-toggle {
  margin-left: auto;
  transition: transform 0.2s;
}

.alert-header[aria-expanded="true"] .alert-toggle {
  transform: rotate(180deg);
}

.alert-body {
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  line-height: 1.6;
  white-space: pre-wrap;
}

.alert-expires {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  opacity: 0.75;
}

/* Responsive */
@media (max-width: 600px) {
  .site-header { flex-direction: column; align-items: stretch; }
  .search-area { max-width: none; }
  .conditions-temp { font-size: 3rem; }
  .forecast-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
  .weather-layout { grid-template-columns: 1fr; }
}