/* --- Base layout and typography --- */
:root {
  --panel-bg: rgba(0,0,0,0.38);
  --panel-radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 20px;
  min-height: 100vh;
  font-family: Arial, sans-serif;
  color: #fff;
  text-align: center;
  overflow-x: hidden;
  transition: background 0.6s ease;
  background: #333; /* fallback */
}

/* Background overlay (theme gradients applied here) */
#bg-overlay {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  transition: background 0.8s ease;
}

/* Particles container sits above gradient but behind UI */
#particles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

/* Theme gradients applied via classes on #bg-overlay */
#bg-overlay.sunny  { background: linear-gradient(to top, #f6d365, #fda085); }
#bg-overlay.cloudy { background: linear-gradient(to top, #757f9a, #d7dde8); }
#bg-overlay.rainy  { background: linear-gradient(to top, #2c3e50, #4ca1af); }
#bg-overlay.snowy  { background: linear-gradient(to top, #83a4d4, #b6fbff); }
#bg-overlay.windy  { background: linear-gradient(to top, #74ebd5, #ACB6E5); }
#bg-overlay.night  { background: linear-gradient(to top, #141E30, #243B55); }

/* Layout */
h1 { margin: 0 0 12px 0; opacity: 0.9; font-weight: 600; }

.main-container {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 20px;
}

/* Sidebar */
.sidebar {
  width: 200px;
  background: var(--panel-bg);
  border-radius: var(--panel-radius);
  padding: 12px;
  text-align: left;
}

.sidebar h3 { margin-top: 0; color: #f0f0f0; }

.city-item {
  cursor: pointer;
  margin: 8px 0;
  padding: 8px;
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  color: #fff;
  font-size: 14px;
  display: flex;
  justify-content: space-between;
}

.city-item:hover { background: rgba(255,255,255,0.08); }

/* Content area panels */
.content { width: 760px; max-width: calc(100vw - 260px); }

.search-container {
  margin: 12px 0 18px;
  display: flex;
  justify-content: center;
  gap: 8px;
}

input[type="text"] {
  padding: 8px 10px;
  border-radius: 6px;
  border: none;
  min-width: 220px;
}

button {
  padding: 8px 12px;
  border-radius: 6px;
  border: none;
  background: rgba(0,0,0,0.6);
  color: #fff;
  cursor: pointer;
}

/* Panels */
.weather-section, .forecast-section {
  background: var(--panel-bg);
  border-radius: var(--panel-radius);
  padding: 16px;
  margin-top: 12px;
}

/* Forecast list */
.forecast-container { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 12px; }

.forecast-day {
  width: 120px;
  min-height: 110px;
  background: rgba(0,0,0,0.28);
  border-radius: 10px;
  padding: 10px;
  color: #fff;
  text-align: center;
  display: inline-block;
}

/* Make icons stand out on dark backgrounds */
.forecast-day img {
  width: 60px;
  height: 60px;
  display: block;
  margin: 6px auto;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.6)) brightness(1.6);
}

/* Particle styles (rain and snow) */
.rain-drop, .snow-flake {
  position: absolute;
  top: -10vh;
  pointer-events: none;
  opacity: 0.85;
}

.rain-drop {
  width: 2px;
  height: 12px;
  background: rgba(255,255,255,0.75);
  transform: translateY(0);
  animation-name: fall;
  animation-timing-function: linear;
}

.snow-flake {
  width: 6px;
  height: 6px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  animation-name: fallSlow;
  animation-timing-function: linear;
}

/* Animations */
@keyframes fall {
  to { transform: translateY(120vh); }
}
@keyframes fallSlow {
  to { transform: translateY(110vh) rotate(360deg); }
}

/* Improve icon/readability on small screens */
@media (max-width: 900px) {
  .main-container { flex-direction: column; align-items: center; }
  .sidebar { width: 90%; margin-bottom: 12px; }
  .content { width: 90%; }
}