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

:root {
  --bg-dark: #0a0a0f;
  --bg-panel: rgba(15, 10, 25, 0.9);
  --accent: #1db954;
  --accent-dim: rgba(29, 185, 84, 0.5);
  --text: #e8e8f0;
  --text-dim: #8888a0;
}

body {
  font-family: 'Rajdhani', sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
  overflow: hidden;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

[data-screen] {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
}

[data-screen].active {
  display: flex;
}

/* Login screen */
.screen-login {
  background: linear-gradient(160deg, #0a0a12 0%, #1a0a2e 40%, #0f1a1a 100%);
}

.screen-login h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  margin-bottom: 0.5rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  background: linear-gradient(90deg, #1db954, #00d4aa, #1db954);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.screen-login p {
  color: var(--text-dim);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.btn-spotify {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  background: #1db954;
  border: none;
  border-radius: 2rem;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-spotify:hover {
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(29, 185, 84, 0.5);
}

.btn-spotify svg {
  width: 28px;
  height: 28px;
}

/* Config screen */
.screen-config {
  background: linear-gradient(160deg, #0a0a12 0%, #1a0a2e 50%, #0f1a1a 100%);
  text-align: center;
}

.screen-config h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.screen-config .config-box {
  max-width: 480px;
  padding: 1.5rem;
  background: var(--bg-panel);
  border: 1px solid rgba(29, 185, 84, 0.2);
  border-radius: 12px;
  text-align: left;
  margin-top: 1rem;
}

.screen-config code {
  font-size: 0.9rem;
  color: var(--accent);
}

.screen-config a {
  color: var(--accent);
  text-decoration: none;
}

.screen-config a:hover {
  text-decoration: underline;
}

.screen-config ol {
  margin: 1rem 0 0 1.2rem;
  color: var(--text-dim);
  line-height: 1.8;
}

/* Viz screen */
.screen-viz {
  padding: 0;
  background: #000;
}

#viz-container {
  position: fixed;
  inset: 0;
  z-index: 0;
}

#viz-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.viz-overlay {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 10;
  padding: 1.5rem 2rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 1rem;
}

.track-info {
  flex: 1;
  min-width: 180px;
}

.track-info h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-info p {
  font-size: 0.9rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.album-art {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  object-fit: cover;
  margin-right: 1rem;
  display: none;
}

.viz-controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.viz-controls button {
  padding: 0.5rem 1rem;
  font-family: 'Rajdhani', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.viz-controls button:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.viz-controls button.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: #fff;
}

.video-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.video-controls label {
  font-size: 0.9rem;
  color: var(--text-dim);
}

.video-controls input[type='range'] {
  width: 80px;
  accent-color: var(--accent);
}

.btn-logout {
  padding: 0.4rem 0.9rem;
  font-size: 0.9rem;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  cursor: pointer;
}

.btn-logout:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.3);
}