body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI",
    sans-serif;
  background: linear-gradient(180deg, #111 0%, #1c1c1e 100%);
  color: white;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  backdrop-filter: blur(12px) saturate(180%);
  background: rgba(30, 30, 30, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.logo {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.nav-buttons {
  display: flex;
  gap: 10px;
}

.nav-btn,
#city-select,
#add-selected-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  padding: 8px 14px;
  border-radius: 10px;
  color: white;
  font-size: 0.9rem;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
}

#city-select option {
  color: black;
}

.nav-btn:hover,
#add-selected-btn:hover,
#city-select:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Select styling */
#city-select {
  appearance: none;
  padding: 8px 14px;
  background-image: url("data:image/svg+xml;utf8,<svg fill='white' height='12' viewBox='0 0 20 20'><path d='M5.516 7.548l4.484 4.482 4.484-4.482L16 8.548 10 14.548 4 8.548z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 12px;
}

/* Carousel Layout */
.carousel {
  position: relative;
  flex: 1;
  align-items: center;
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease-in-out;
  height: 100%;
}

.city-card {
  flex: 0 0 20%;
  height: 100%;
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: flex-end;
  transition: transform 0.5s ease-in-out;
}

.city-card:hover {
  transform: scale(1.03);
}

.overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.5));
  transition: background 2s cubic-bezier(0.4, 0, 0.2, 1) 0.2s; /* add delay */
  will-change: background;
}

.city-card:hover .overlay {
  background: linear-gradient(to top, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.1));
}

.content {
  position: relative;
  padding: 20px;
  z-index: 1;
}

.content h2 {
  margin: 0;
  font-size: 1.5rem;
}

.country {
  font-size: 0.9rem;
  opacity: 0.8;
}

.time {
  font-size: 2.2rem;
  font-weight: bold;
}

.utc,
.temp {
  font-size: 0.85rem;
  opacity: 0.8;
}

/* Arrows */
.arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  border: none;
  color: white;
  font-size: 2rem;
  padding: 10px;
  cursor: pointer;
  z-index: 2;
}

.arrow.left {
  left: 10px;
}

.arrow.right {
  right: 10px;
}

/* Footer */
footer {
  backdrop-filter: blur(10px);
  background: rgba(30, 30, 30, 0.6);
  padding: 14px;
  text-align: center;
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

footer a {
  color: white;
}