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

:root {
  --bg: #0b1120;
  --card: rgba(21,29,48,0.85);
  --card-solid: #151d30;
  --card-hover: #1a2540;
  --text: #e8ecf1;
  --muted: #7a8ba5;
  --accent: #38bdf8;
  --accent2: #818cf8;
  --border: #1e2d4a;
  --radius: 16px;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 1s ease;
}

/* Dynamic weather backgrounds */
body.weather-clear    { background: linear-gradient(135deg, #0f2027 0%, #203a43 40%, #2c5364 100%); }
body.weather-clouds   { background: linear-gradient(135deg, #1a1a2e 0%, #2d3748 50%, #4a5568 100%); }
body.weather-rain     { background: linear-gradient(135deg, #0f0c29 0%, #1a1a3e 50%, #24243e 100%); }
body.weather-snow     { background: linear-gradient(135deg, #e6dada 0%, #274046 100%); }
body.weather-storm    { background: linear-gradient(135deg, #0f0f0f 0%, #1a0a2e 50%, #16213e 100%); }
body.weather-night    { background: linear-gradient(135deg, #0c0c1e 0%, #1a1a3e 50%, #0d1b2a 100%); }
body.weather-fog      { background: linear-gradient(135deg, #2d3748 0%, #4a5568 50%, #718096 100%); }

/* Animated particles (rain / snow) */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  top: -10px;
  opacity: 0.6;
  animation: fall linear infinite;
}

@keyframes fall {
  to { transform: translateY(105vh) rotate(360deg); }
}

.app {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
  padding: 1rem;
}

header { text-align: center; padding: 1.5rem 0 1rem; }

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.top-bar h1 {
  font-size: 1.8rem;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.controls { display: flex; gap: 0.5rem; }

.unit-btn, .locate-btn {
  padding: 0.5rem 1rem;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  backdrop-filter: blur(10px);
}

.unit-btn:hover, .locate-btn:hover, .share-btn:hover {
  border-color: var(--accent);
  background: rgba(56,189,248,0.1);
}

.unit-btn.active { border-color: var(--accent); background: rgba(56,189,248,0.15); }

.fav-btn {
  padding: 0.7rem;
  background: var(--card);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: 12px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.2s;
}

.fav-btn:hover { border-color: #facc15; background: rgba(250,204,21,0.1); }
.fav-btn.active { border-color: #facc15; background: rgba(250,204,21,0.15); }

.search-box {
  display: flex;
  gap: 0.5rem;
  max-width: 420px;
  margin: 0 auto;
}

#search {
  flex: 1;
  padding: 0.7rem 1rem;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
  backdrop-filter: blur(10px);
}

#search:focus { border-color: var(--accent); }

#search-btn {
  padding: 0.7rem 1.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
}

#search-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 20px rgba(56,189,248,0.3);
}

/* Current weather */
.current {
  background: var(--card);
  backdrop-filter: blur(20px);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.current .weather-icon { font-size: 4.5rem; line-height: 1; animation: bounce 2s ease infinite; }

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.current .info { flex: 1; min-width: 200px; }
.current .city-name { font-size: 1.6rem; font-weight: 700; margin-bottom: 0.2rem; }
.current .date { color: var(--muted); font-size: 0.85rem; margin-bottom: 0.5rem; }
.current .temp-big { font-size: 3.5rem; font-weight: 700; line-height: 1; }
.current .temp-big span { font-size: 1.5rem; color: var(--muted); }
.current .desc { font-size: 1.1rem; color: var(--muted); text-transform: capitalize; margin-top: 0.3rem; }

.current .details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.8rem;
  margin-top: 1.5rem;
  width: 100%;
}

.detail-card {
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  padding: 0.7rem;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.05);
  transition: transform 0.2s;
}

.detail-card:hover { transform: translateY(-2px); }
.detail-card .label { font-size: 0.7rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }
.detail-card .value { font-size: 1.2rem; font-weight: 700; margin-top: 0.2rem; }

/* Event recommendations */
.events-section { margin-bottom: 1.5rem; }

h2 {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 0.8rem;
  padding-left: 0.25rem;
}

.events-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.7rem;
}

.event-card {
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 1rem;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  animation: fadeIn 0.4s ease;
}

.event-card .event-icon { font-size: 2rem; margin-bottom: 0.4rem; }
.event-card .event-title { font-size: 0.85rem; font-weight: 600; margin-bottom: 0.2rem; }
.event-card .event-tip { font-size: 0.75rem; color: var(--muted); line-height: 1.3; }

.event-card.good { border-color: rgba(34,197,94,0.3); }
.event-card.good .event-title { color: #4ade80; }
.event-card.warn { border-color: rgba(250,204,21,0.3); }
.event-card.warn .event-title { color: #facc15; }
.event-card.bad { border-color: rgba(248,113,113,0.3); }
.event-card.bad .event-title { color: #f87171; }

/* Chart */
.chart-container {
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255,255,255,0.06);
  overflow-x: auto;
}

#hourly-chart { width: 100%; height: 220px; }

/* Sunrise / Sunset */
.sun-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.sun-card {
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 1.2rem;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
}

.sun-card .sun-icon { font-size: 2.5rem; }
.sun-card .sun-label { font-size: 0.8rem; color: var(--muted); margin: 0.3rem 0; text-transform: uppercase; letter-spacing: 0.5px; }
.sun-card .sun-time { font-size: 1.6rem; font-weight: 700; }

.sun-card.sunrise { border-color: rgba(251,191,36,0.2); }
.sun-card.sunrise .sun-time { color: #fbbf24; }
.sun-card.sunset { border-color: rgba(168,85,247,0.2); }
.sun-card.sunset .sun-time { color: #a855f7; }

/* 7-day */
.daily-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.7rem;
}

.day-card {
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 1rem 0.7rem;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.2s;
  animation: fadeIn 0.4s ease;
}

.day-card:hover { background: var(--card-hover); transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,0,0,0.3); }
.day-card.today { border-color: var(--accent); box-shadow: 0 0 15px rgba(56,189,248,0.15); }
.day-card .day-name { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; color: var(--muted); margin-bottom: 0.5rem; }
.day-card .day-icon { font-size: 1.8rem; margin: 0.3rem 0; }
.day-card .day-temps { font-size: 0.85rem; }
.day-card .day-temps .hi { font-weight: 700; }
.day-card .day-temps .lo { color: var(--muted); }
.day-card .day-rain { font-size: 0.75rem; color: var(--accent); margin-top: 0.4rem; }
.day-card .day-wind { font-size: 0.7rem; color: var(--muted); margin-top: 0.2rem; }

/* Compare Cities */
.compare-section { margin-top: 1.5rem; margin-bottom: 1.5rem; }

.compare-input {
  display: flex;
  gap: 0.5rem;
  max-width: 400px;
}

.compare-input input {
  flex: 1;
  padding: 0.6rem 1rem;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
}

.compare-input input:focus { border-color: var(--accent); }

.compare-input button {
  padding: 0.6rem 1.2rem;
  background: var(--accent2);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s;
}

.compare-input button:hover { transform: scale(1.05); }

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.compare-card {
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 1.2rem;
  border: 1px solid rgba(255,255,255,0.06);
  animation: fadeIn 0.4s ease;
}

.compare-card .cc-city {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.compare-card .cc-icon { font-size: 2rem; margin: 0.3rem 0; }

.compare-card .cc-temp {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.compare-card .cc-desc {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: capitalize;
  margin-bottom: 0.8rem;
}

.compare-card .cc-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  font-size: 0.8rem;
}

.compare-card .cc-detail {
  background: rgba(255,255,255,0.04);
  border-radius: 8px;
  padding: 0.4rem 0.6rem;
  text-align: center;
}

.compare-card .cc-detail .label { color: var(--muted); font-size: 0.7rem; }
.compare-card .cc-detail .val { font-weight: 700; font-size: 0.9rem; }

.compare-card.winner { border-color: rgba(34,197,94,0.3); }
.compare-card.winner .cc-city::after { content: " 🏆"; font-size: 0.8rem; }

.loading, .error { text-align: center; padding: 3rem 1rem; color: var(--muted); }

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 1rem;
}

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

.error { color: #f87171; font-size: 1.1rem; }

/* Favorites bar */
.favorites-bar {
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  margin-bottom: 1rem;
  border: 1px solid rgba(250,204,21,0.15);
}

.favorites-bar h3 {
  font-size: 0.8rem;
  color: #facc15;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.favorites-list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.fav-chip {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.7rem;
  background: rgba(250,204,21,0.1);
  border: 1px solid rgba(250,204,21,0.2);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text);
  transition: all 0.2s;
}

.fav-chip:hover { background: rgba(250,204,21,0.2); border-color: #facc15; }

.fav-chip .fav-remove {
  font-size: 0.9rem;
  color: #f87171;
  cursor: pointer;
  margin-left: 0.2rem;
}

.fav-chip .fav-remove:hover { color: #ef4444; }

/* Weather Alert */
.weather-alert {
  background: linear-gradient(135deg, rgba(248,113,113,0.15) 0%, rgba(239,68,68,0.1) 100%);
  border: 1px solid rgba(248,113,113,0.3);
  border-radius: 14px;
  padding: 1rem 1.2rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  animation: fadeIn 0.4s ease;
}

.weather-alert .alert-icon { font-size: 1.8rem; }
.weather-alert .alert-text { flex: 1; }
.weather-alert .alert-title { font-weight: 700; color: #f87171; font-size: 0.95rem; }
.weather-alert .alert-desc { color: var(--muted); font-size: 0.85rem; margin-top: 0.2rem; }
.weather-alert .alert-close {
  background: none;
  border: none;
  color: #888;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.3rem;
}

.weather-alert .alert-close:hover { color: #f87171; }

/* Air Quality */
.aqi-section { margin-bottom: 1.5rem; }

.aqi-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.7rem;
}

.aqi-card {
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 1rem;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
}

.aqi-card .aqi-label { font-size: 0.7rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }
.aqi-card .aqi-value { font-size: 1.5rem; font-weight: 700; margin: 0.3rem 0; }
.aqi-card .aqi-status { font-size: 0.75rem; font-weight: 600; }

.aqi-good .aqi-value { color: #4ade80; }
.aqi-good .aqi-status { color: #4ade80; }
.aqi-moderate .aqi-value { color: #facc15; }
.aqi-moderate .aqi-status { color: #facc15; }
.aqi-unhealthy .aqi-value { color: #f97316; }
.aqi-unhealthy .aqi-status { color: #f97316; }
.aqi-bad .aqi-value { color: #f87171; }
.aqi-bad .aqi-status { color: #f87171; }
.aqi-very-bad .aqi-value { color: #a855f7; }
.aqi-very-bad .aqi-status { color: #a855f7; }

.hidden { display: none !important; }

@media (max-width: 600px) {
  .top-bar { flex-direction: column; }
  .top-bar h1 { font-size: 1.4rem; }
  .current { flex-direction: column; text-align: center; padding: 1.5rem; }
  .current .temp-big { font-size: 2.5rem; }
  .sun-cards { grid-template-columns: 1fr; }
  .daily-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
  .events-grid { grid-template-columns: 1fr 1fr; }
}