:root {
  --main-bg: #f9f9f9;
  --accent: #28a745;
  --accent-dark: #218838;
  --danger: #dc3545;
  --text: #333;
  --light-text: #777;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  font-family: var(--font);
  background-color: var(--main-bg);
  margin: 0;
  padding: 0;
  color: var(--text);
}

header {
  text-align: center;
  background-color: #111;
  padding: 1rem;
}

.controls {
  text-align: center;
  margin: 2rem 1rem 1rem;
}

.radio-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 2rem;
}

.radio-station {
  background-color: #fff;
  border-radius: var(--radius);
  box-shadow: var(--box-shadow);
  padding: 1.5rem;
  width: 300px;
  min-height: 480px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
  position: relative;
  margin: 1rem;
  transition: all 0.3s ease;
}

.radio-station.active {
  border: 4px solid var(--accent);
  background-color: #eaffea;
  transform: scale(1.02);
}

.logo {
  width: 120px;
  height: auto;
  margin: 0 auto 1rem;
  object-fit: contain;
}

.radio-station h2 {
  font-size: 1.2rem;
  margin: 0.5rem 0;
}

.mini-info {
  min-height: 48px;
  font-size: 0.9rem;
  color: var(--light-text);
  margin-bottom: 10px;
}

.station-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.play-button {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  font-size: 1.1rem;
  background-color: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.3s;
}

.play-button:hover {
  background-color: var(--accent-dark);
}

.usage {
  font-size: 0.9rem;
  color: var(--light-text);
}

.wave-icon {
  position: absolute;
  top: 12px;
  left: 12px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  animation: wave 1.2s infinite ease-in-out;
}

.wave-icon.hidden {
  display: none;
}

@keyframes wave {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.6); opacity: 0.4; }
  100% { transform: scale(1); opacity: 1; }
}


#volume {
  width: 60%;
  max-width: 300px;
  margin: 1rem auto;
  display: inline-block;
  accent-color: var(--accent);
  cursor: pointer;
  height: 6px;
  border-radius: 5px;
  background-color: #ddd;
  outline: none;
}

#volumeValue {
  display: inline-block;
  margin-left: 12px;
  font-weight: bold;
  font-size: 1rem;
  color: var(--accent);
}

#resetButton {
  margin-top: 1.5rem;
  padding: 0.7rem 1.4rem;
  font-size: 1rem;
  font-weight: bold;
  background-color: #fff;
  color: var(--danger);
  border: 2px solid var(--danger);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
}

#resetButton:hover {
  background-color: var(--danger);
  color: #fff;
}