:root {
  --bg-clear: linear-gradient(to bottom, #4facfe, #00f2fe);
  --bg-clouds: linear-gradient(to bottom, #757f9a, #d7dde8);
  --bg-rain: linear-gradient(to bottom, #3a6073, #16222a);
  --bg-snow: linear-gradient(to bottom, #83a4d4, #b6fbff);
  --bg-thunder: linear-gradient(to bottom, #232526, #414345);
  --bg-fog: linear-gradient(to bottom, #bdc3c7, #2c3e50);

  --glass-weak: rgba(255,255,255,0.08);
  --glass-strong: rgba(255,255,255,0.18);
  --muted: rgba(255,255,255,0.85);
}

/* Reset + base  */
* { margin: 0; padding: 0; box-sizing: border-box; }
html,body { height: 100%; }
body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--bg-clear);
  color: white;
  transition: background 1s ease;
  overflow: hidden;
  padding: 24px;
}

/* Weather card */
.app {
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  backdrop-filter: blur(18px);
  border-radius: 18px;
  box-shadow: 0 10px 40px rgba(6,10,22,0.5);
  padding: 28px;
  width: 100%;
  max-width: 460px;
  position: relative;
  z-index: 10;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.04);
  animation: fadeIn 0.7s ease;
}

@keyframes fadeIn {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.app h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Search bar (modern) */
.search-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  background: var(--glass-weak);
  border-radius: 12px;
  padding: 6px;
  margin-bottom: 20px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.03);
}

.search-bar input {
  flex: 1;
  padding: 12px 14px;
  border: none;
  background: transparent;
  color: white;
  font-size: 1rem;
  outline: none;
  font-weight: 600;
}

.search-bar input::placeholder { color: rgba(106, 48, 48, 0.7); font-weight: 500; }

.search-bar button {
  padding: 10px 16px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  background: linear-gradient(180deg, #ffffff, #e9f0ff);
  color: #0b1220;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 6px 18px rgba(11,18,32,0.25);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.search-bar button:active { transform: translateY(1px); }

/* Weather info */
.weather-card { margin-top: 6px; }

.temp {
  font-size: 64px;
  font-weight: 800;
  margin: 6px 0 4px;
  line-height: 1;
  text-shadow: 0 6px 16px rgba(2,6,23,0.45);
}

.desc {
  text-transform: capitalize;
  font-size: 1.05rem;
  opacity: 0.95;
  margin-bottom: 6px;
}

#location {
  font-size: 0.95rem;
  opacity: 0.85;
  letter-spacing: 0.2px;
}

/* Footer note */
.footer-note {
  margin-top: 14px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  opacity: 0.9;
}

/* EFFECT LAYERS */
.rain, .snow, .clouds, .fog, .flash {
  pointer-events: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1;
}

/* RAIN */
.drop {
  position: absolute;
  bottom: 100%;
  background: rgba(255,255,255,0.3);
  animation: rainFall linear infinite;
}
@keyframes rainFall {
  to { transform: translateY(110vh); }
}

/* SNOW */
.flake {
  position: absolute;
  top: -10px;
  background: white;
  border-radius: 50%;
  opacity: 0.8;
  animation: snowFall linear infinite;
}
@keyframes snowFall {
  to { transform: translateY(110vh) translateX(20px); }
}

/* CLOUDS */
.cloud {
  position: absolute;
  background: white;
  opacity: 0.4;
  border-radius: 50%;
  filter: blur(8px);
  animation: cloudMove linear infinite;
}
@keyframes cloudMove {
  from { transform: translateX(-250px); }
  to { transform: translateX(110vw); }
}

/* FOG */
.fog {
  background: rgba(255,255,255,0.3);
  filter: blur(25px);
  opacity: 0;
  transition: opacity 1s;
}

/* FLASH */
.flash {
  background: white;
  opacity: 0;
  z-index: 2;
}

.history {
  margin-top: 18px;
  text-align: left;
}

.history h4 {
  font-size: 0.9rem;
  opacity: 0.85;
  margin-bottom: 6px;
}

.history ul {
  list-style: none;
}

.history li {
  padding: 8px 10px;
  margin-bottom: 6px;
  background: var(--glass-weak);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.history li:hover {
  background: var(--glass-strong);
}
#clearHistoryBtn {
  float: right;
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.85);
  font-size: 0.75rem;
  cursor: pointer;
}

#clearHistoryBtn:hover {
  text-decoration: underline;
}
.mode-switch {
  display: flex;
  justify-content: center;
  margin-top: 12px;
}

.mode-switch input {
  display: none;
}

.switch-label {
  width: 70px;
  height: 34px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border-radius: 30px;
  position: relative;
  cursor: pointer;
  transition: background 0.3s;
}

.switch-ball {
  width: 28px;
  height: 28px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 3px;
  left: 3px;
  transition: transform 0.4s;
  z-index: 2;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  pointer-events: none;
  transition: opacity 0.3s;
}

.icon.sun {
  left: 8px;
  opacity: 1;
}

.icon.moon {
  right: 8px;
  opacity: 0.3;
}

/* Checked state */
#modeToggle:checked + .switch-label .switch-ball {
  transform: translateX(36px);
}

#modeToggle:checked + .switch-label .icon.sun {
  opacity: 0.3;
}

#modeToggle:checked + .switch-label .icon.moon {
  opacity: 1;
}

#modeToggle:checked + .switch-label {
  background: rgba(255,255,255,0.2);
}

body.dark-mode {
  background: #121212 !important;
  color: #eee !important;
}

body.dark-mode .app {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255,255,255,0.1);
}

body.dark-mode .search-bar input {
  color: #fff;
}

body.dark-mode .search-bar button {
  color: #0b1220;
  background: rgba(255,255,255,0.2);
}

body.dark-mode .history li {
  background: rgba(255,255,255,0.05);
}

body.dark-mode #modeToggle {
  background: rgba(255,255,255,0.08);
  color: #fff;
}
.loader {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255,255,255,0.2);
  border-top-color: rgba(255,255,255,0.85);
  border-radius: 50%;
  margin: 20px auto;
  animation: spin 1s linear infinite;
  display: none; /* hidden by default */
}

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

#introContainer {
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  background: black;
  transition: opacity 1s ease; /* fade effect */
}

.intro-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#skipBtn {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 8px 14px;
  border: none;
  border-radius: 8px;
  background: rgba(255,255,255,0.2);
  color: white;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: background 0.3s;
}

#skipBtn:hover {
  background: rgba(255,255,255,0.35);
}