html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

/* Dark Theme */
.dark-theme {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #e0e0e0;
  padding: 20px;
}

.dark-theme main {
  width: 100%;
}

.dark-theme h1 {
  color: #00d9ff;
  text-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
}

.dark-theme .lead {
  color: #b0b0b0;
}

.dark-theme .text-muted {
  color: #808080 !important;
}

/* Card Styles */
.card {
  background: rgba(30, 30, 50, 0.8);
  border: 2px solid rgba(0, 217, 255, 0.3);
  border-radius: 15px;
  transition: all 0.3s;
  backdrop-filter: blur(10px);
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 217, 255, 0.6);
  box-shadow: 0 10px 30px rgba(0, 217, 255, 0.3);
}

.card-body {
  padding: 2rem;
}

/* Form Controls */
.form-label {
  color: #00d9ff;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.form-control {
  background: rgba(20, 20, 40, 0.6);
  border: 1px solid rgba(0, 217, 255, 0.3);
  color: #e0e0e0;
  border-radius: 8px;
}

.form-control:focus {
  background: rgba(20, 20, 40, 0.8);
  border-color: #00d9ff;
  color: #ffffff;
  box-shadow: 0 0 0 0.25rem rgba(0, 217, 255, 0.25);
}

.form-control::placeholder {
  color: #606060;
}

/* Button Styles */
.btn-primary {
  background: linear-gradient(45deg, #00d9ff, #0099cc);
  border: none;
  border-radius: 25px;
  padding: 12px 40px;
  font-weight: 600;
  transition: all 0.3s;
  box-shadow: 0 5px 15px rgba(0, 217, 255, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(45deg, #00ffff, #00d9ff);
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 217, 255, 0.5);
}

/* Alert Styles */
.alert-success {
  border-radius: 10px;
  font-size: 1.2rem;
  background: linear-gradient(135deg, rgba(0, 217, 255, 0.2) 0%, rgba(0, 153, 204, 0.2) 100%);
  border: 2px solid rgba(0, 217, 255, 0.5);
  color: #00ffff;
  text-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
}

/* Secondary Button Styles */
.btn-secondary {
  background: linear-gradient(45deg, #6c757d, #495057);
  border: none;
  border-radius: 25px;
  padding: 10px 30px;
  font-weight: 600;
  transition: all 0.3s;
  box-shadow: 0 5px 15px rgba(108, 117, 125, 0.3);
  color: #ffffff;
}

.btn-secondary:hover {
  background: linear-gradient(45deg, #7d8a96, #6c757d);
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(108, 117, 125, 0.5);
  color: #ffffff;
}

.btn-secondary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Audio Player Styles */
.audio-player {
  margin-top: 1rem;
}

.audio-player audio {
  border-radius: 10px;
  background: rgba(20, 20, 40, 0.6);
  border: 1px solid rgba(0, 217, 255, 0.3);
}

.audio-player audio::-webkit-media-controls-panel {
  background: rgba(20, 20, 40, 0.8);
}