:root {
  --bg-color: #0a0a0c;
  --card-bg: rgba(255, 255, 255, 0.05);
  --accent-primary: #8b5cf6;
  --accent-secondary: #3b82f6;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --glass-border: rgba(255, 255, 255, 0.1);
  --success: #10b981;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 0% 0%, rgba(139, 92, 246, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 100% 100%, rgba(59, 130, 246, 0.15) 0%, transparent 40%);
}

.dashboard-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-right: 1px solid var(--glass-border);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.nav-menu {
  list-style: none;
  margin-top: 1rem;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 1rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 12px;
  margin-bottom: 0.5rem;
  transition: all 0.3s;
  font-weight: 500;
}

.nav-item i {
  margin-right: 12px;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-item.active {
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(139, 92, 246, 0.2);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 3rem;
}

/* Main Content */
.main-content {
  padding: 3rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 2rem;
  font-weight: 700;
}

/* Glass Card */
.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 2.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.input-group {
  margin-bottom: 2rem;
}

label {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 1.25rem;
  color: white;
  font-size: 1.1rem;
  resize: none;
  transition: border-color 0.3s;
}

textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

select, input[type="time"], input[type="number"] {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  color: white;
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border: none;
  padding: 1.25rem 2.5rem;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  width: 100%;
  font-size: 1rem;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(139, 92, 246, 0.5);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Audio Preview Section */
.audio-preview {
  margin-top: 2rem;
  padding: 1.5rem;
  background: rgba(139, 92, 246, 0.1);
  border-radius: 16px;
  display: none; /* Show only when audio generated */
  align-items: center;
  gap: 1rem;
}

.audio-preview.visible {
  display: flex;
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Status Badges */
.badge {
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success { background: rgba(16, 185, 129, 0.2); color: var(--success); }