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

:root {
  --neon-primary: #00f3ff;
  --neon-secondary: #ff00ff;
  --neon-accent: #00ff88;
  --bg-dark: #0a0a0f;
  --bg-panel: rgba(20, 20, 30, 0.9);
  --text-light: #ffffff;
  --text-dim: rgba(255, 255, 255, 0.6);
}

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

#visualizer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.header {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  z-index: 10;
}

.logo {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.75rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.upload-container {
  margin-right: 0.5rem;
}

.upload-container .upload-btn {
  font-size: 0.8rem;
  padding: 0.5rem 1rem;
  min-width: 120px;
}

.upload-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
  border-radius: 30px;
  cursor: pointer;
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 3px 15px rgba(0, 243, 255, 0.3);
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(0, 243, 255, 0.5);
}

.controls {
  position: fixed;
  bottom: 1.5rem;
  left: 1rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
  background: var(--bg-panel);
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  flex-wrap: wrap;
  justify-content: flex-start;
  max-width: 90vw;
  z-index: 10;
}

.control-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.control-group label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--neon-primary);
  font-weight: 600;
  text-shadow: 0 0 6px var(--neon-primary);
}

.control-group input[type="range"] {
  width: 70px;
  height: 4px;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  background: var(--neon-primary);
  border-radius: 50%;
  cursor: pointer;
}

.control-group select {
  padding: 0.3rem 0.5rem;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;
  color: var(--text-light);
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  backdrop-filter: blur(5px);
}

.control-group select:hover {
  background: rgba(0, 0, 0, 0.8);
  border-color: var(--neon-primary);
}

.control-group select:focus {
  border-color: var(--neon-accent);
  box-shadow: 0 0 10px rgba(0, 243, 255, 0.4);
}

.control-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.control-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--neon-primary);
}

.control-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.control-btn .icon {
  font-size: 0.9rem;
}

.info-panel {
  position: fixed;
  top: 1.5rem;
  right: 1rem;
  display: flex;
  gap: 0.75rem;
  background: var(--bg-panel);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 10;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat .label {
  font-size: 0.55rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.stat .value {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--neon-primary);
}

.drop-zone {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 15, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  pointer-events: auto;
  transition: opacity 0.3s ease;
}

.drop-zone.hidden {
  opacity: 0;
  pointer-events: none;
}

.drop-content {
  text-align: center;
}

.drop-content .icon {
  font-size: 3.5rem;
  display: block;
  margin-bottom: 0.75rem;
}

.drop-content h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.drop-content p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Color themes */
body.theme-sunset {
  --neon-primary: #ff6b6b;
  --neon-secondary: #feca57;
  --neon-accent: #ff9ff3;
}

body.theme-ocean {
  --neon-primary: #0abdc6;
  --neon-secondary: #4834d4;
  --neon-accent: #22a6b3;
}

body.theme-forest {
  --neon-primary: #26de81;
  --neon-secondary: #20bf6b;
  --neon-accent: #0fb9b1;
}

body.theme-cosmic {
  --neon-primary: #a55eea;
  --neon-secondary: #8854d0;
  --neon-accent: #4b6584;
}

/* Improved dropdown styling */
.mode-label, .theme-label {
  font-size: 0.7rem !important;
  font-weight: 600;
  color: var(--neon-primary) !important;
  text-shadow: 0 0 8px var(--neon-primary);
}

.mode-selector, .theme-selector {
  margin: 0 0.25rem;
}

.mode-select, .theme-select {
  min-width: 120px !important;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.8) !important;
  border: 2px solid var(--neon-primary) !important;
  border-radius: 8px !important;
  color: var(--text-light) !important;
  font-size: 0.75rem !important;
  padding: 0.4rem 0.6rem !important;
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.3) !important;
  backdrop-filter: blur(10px) !important;
}

.mode-select:hover, .theme-select:hover {
  background: rgba(0, 0, 0, 0.9) !important;
  border-color: var(--neon-secondary) !important;
  box-shadow: 0 0 20px rgba(0, 243, 255, 0.6) !important;
}

.mode-select:focus, .theme-select:focus {
  outline: none;
  border-color: var(--neon-accent) !important;
  box-shadow: 0 0 25px rgba(0, 243, 255, 0.8) !important;
}

@media (max-width: 500px) {
  .logo {
    font-size: 1.25rem;
  }
  
  .controls {
    padding: 0.5rem 0.75rem;
    gap: 0.5rem;
    bottom: 0.5rem;
    left: 0.5rem;
  }
  
  .control-group input[type="range"] {
    width: 50px;
  }
  
  .info-panel {
    top: auto;
    bottom: 65px;
    right: 50%;
    transform: translateX(50%);
  }
  
  .stat .value {
    font-size: 0.75rem;
  }
  
  .drop-content h2 {
    font-size: 1.1rem;
  }
  
  .drop-content .icon {
    font-size: 2.5rem;
  }
  
  .mode-select, .theme-select {
    min-width: 100px !important;
    font-size: 0.75rem;
  }
  
  .upload-container .upload-btn {
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
    min-width: 100px;
  }
}