:root {
  --bg-main: #0b0f19;
  --bg-card: rgba(18, 24, 38, 0.85);
  --bg-input: #151d30;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(99, 102, 241, 0.4);
  --accent-purple: #8b5cf6;
  --accent-indigo: #6366f1;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-family);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Glassmorphism Classes */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Top Navigation */
header {
  border-bottom: 1px solid var(--border-color);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 25, 0.8);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.nav-tabs {
  display: flex;
  gap: 8px;
  background: rgba(0, 0, 0, 0.3);
  padding: 6px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.nav-tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.nav-tab-btn.active {
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  color: #fff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Main Container */
main {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Tab Sections */
.tab-pane {
  display: none;
  animation: fadeIn 0.25s ease forwards;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Form Controls */
.form-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input[type="text"], input[type="number"], select, textarea {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: all 0.2s;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--border-active);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.6;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-emerald {
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-emerald:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* Variant Cards */
.variant-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.2s;
}

.variant-card:hover {
  border-color: var(--border-active);
  background: rgba(255, 255, 255, 0.05);
}

.variant-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 6px;
  width: fit-content;
}

.badge-purple { background: rgba(139, 92, 246, 0.2); color: #c4b5fd; }
.badge-emerald { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }
.badge-amber { background: rgba(245, 158, 11, 0.2); color: #fde68a; }

/* Prompt Box */
.prompt-box {
  background: #060911;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 14px;
  font-family: monospace;
  font-size: 0.85rem;
  color: #cbd5e1;
  white-space: pre-wrap;
  max-height: 220px;
  overflow-y: auto;
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 6px 10px;
  font-size: 0.75rem;
  border-radius: 6px;
}

/* Live Terminal Log */
.terminal-drawer {
  background: #05070d;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.terminal-header {
  padding: 10px 16px;
  background: #0f1523;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.terminal-body {
  height: 180px;
  padding: 12px 16px;
  overflow-y: auto;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  color: #38bdf8;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.terminal-line {
  word-break: break-all;
}

/* Audio Player */
audio {
  width: 100%;
  height: 36px;
  border-radius: 8px;
  outline: none;
}