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

body {
  font-family: system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

/* APP LAYOUT */
.app {
  width: 100%;
  max-width: 1100px;
  padding: 16px;
}

/* GRID SYSTEM */
.grid {
  display: grid;
  gap: 16px;
}

/* 📱 MOBILE (default) */
.grid {
  grid-template-columns: 1fr;
}

/* 📲 TABLET */
@media (min-width: 600px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* 💻 DESKTOP */
@media (min-width: 900px) {
  .grid {
    grid-template-columns: 2fr 1fr;
  }
}

/* Cards fill space better */
.card {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;

  backdrop-filter: blur(15px);
  background: rgba(255,255,255,0.1);
  border-radius: 20px;
  padding: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

/* Current weather */
.current {
  text-align: center;
  margin-bottom: 20px;
}

/* Weather takes more space */
.weather {
  min-height: 300px;
}

#summary {
  font-size: 18px;
  opacity: 0.9;
}

/* Forecast */
.forecast {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.day {
  background: rgba(255,255,255,0.15);
  border-radius: 14px;
  padding: 10px;
  text-align: center;
  transition: 0.2s;
}

.day:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.25);
}

.day span {
  display: block;
  font-size: 13px;
}

/* Electricity compact */
.electricity {
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#price {
  font-size: 28px;
  font-weight: 700;
}

/* Improve forecast responsiveness */
.forecast {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

/* mobile: 3 columns */
.forecast {
  grid-template-columns: repeat(3, 1fr);
}

/* tablet+: 5 columns */
@media (min-width: 600px) {
  .forecast {
    grid-template-columns: repeat(5, 1fr);
  }
}

header {
  position: relative;
  text-align: center;
  margin-bottom: 20px;
}

.current {
  margin-bottom: 16px;
}

/* Toggle button */
#themeToggle {
  position: absolute;
  right: 20px;
  top: 20px;
  border: none;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  padding: 8px 10px;
  cursor: pointer;
  color: white;
  font-size: 16px;
}

/* LIGHT MODE */
body.light {
  background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
  color: #222;
}

body.light .card {
  background: rgba(255,255,255,0.7);
  color: #222;
}

body.light .day {
  background: rgba(0,0,0,0.05);
}

.icon {
  font-size: 48px;
  margin-bottom: 10px;
  animation: float 3s ease-in-out infinite;
}

/* floating animation */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* optional glow */
.icon.sun { filter: drop-shadow(0 0 10px gold); }
.icon.cloud { opacity: 0.9; }
.icon.rain { animation: rain 1s infinite linear; }

@keyframes rain {
  0% { transform: translateY(0); }
  100% { transform: translateY(5px); }
}

.prices-grid {
   display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 6px;
  margin-top: 10px;
}

/* tablet */
@media (min-width: 600px) {
  .prices-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* desktop */
@media (min-width: 900px) {
  .prices-grid {
    grid-template-columns: repeat(8, 1fr);
  }
}

.price-cell {
  padding: 6px 4px;
  border-radius: 10px;
  text-align: center;
  font-size: 10px;
  line-height: 1.2;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(6px);
}

/* color levels */
.low { background: rgba(76, 175, 80, 0.3); }
.mid { background: rgba(255, 193, 7, 0.3); }
.high { background: rgba(255, 82, 82, 0.3); }

.price-hour {
   font-size: 11px;
  font-weight: 600;
}

.price-value {
  opacity: 0.9;
}

#priceChart {
  margin-top: 12px;
  background: rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 8px;
}

#cheapest {
  margin-top: 10px;
  text-align: center;
  font-weight: bold;
}

.price-days {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* mobile fallback */
@media (max-width: 600px) {
  .price-days {
    grid-template-columns: 1fr;
  }
}

.day-block h4 {
  margin-bottom: 6px;
  font-size: 13px;
  opacity: 0.9;
}

/* inner grid = compact 2-column split */
.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 5px;
}

/* compact cells */
.mini-cell {
  background: rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 6px;
  font-size: 10px;
  text-align: center;
  line-height: 1.2;
}

/* price colors */
.low { background: rgba(76,175,80,0.25); }
.mid { background: rgba(255,193,7,0.25); }
.high { background: rgba(255,82,82,0.25); }