/* =========================================================
   DESIGN SYSTEM — AI Education Voice Receptionist
   Modern Glassmorphic Dark/Light Design with Vibrant Accents
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* ─── Color Palette (Dark Theme Default) ─── */
  --bg-app: #090d16;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #15203b;
  --bg-surface-glass: rgba(15, 23, 42, 0.78);
  --bg-surface-hover: #1e293b;
  --bg-sidebar: #0b1120;
  --bg-topbar: rgba(11, 17, 32, 0.85);
  
  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --border-focus: #6366f1;
  --border-glass: rgba(255, 255, 255, 0.12);

  /* Primary Accent: Indigo & Violet */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #818cf8;
  --primary-glow: rgba(99, 102, 241, 0.28);
  --primary-surface: rgba(99, 102, 241, 0.12);

  /* Secondary Accent: Cyan / Sky */
  --accent-cyan: #06b6d4;
  --accent-cyan-surface: rgba(6, 182, 212, 0.12);

  /* Status Colors */
  --success: #10b981;
  --success-surface: rgba(16, 185, 129, 0.12);
  --success-glow: rgba(16, 185, 129, 0.25);

  --warning: #f59e0b;
  --warning-surface: rgba(245, 158, 11, 0.12);
  --warning-glow: rgba(245, 158, 11, 0.25);

  --danger: #ef4444;
  --danger-surface: rgba(239, 68, 68, 0.12);
  --danger-glow: rgba(239, 68, 68, 0.25);

  --info: #3b82f6;
  --info-surface: rgba(59, 130, 246, 0.12);

  /* Typography Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Typography Font Families */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;

  /* Elevations & Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 24px var(--primary-glow);
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-subtle);

  /* Radii */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 240ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ─── Light Mode Override ─── */
[data-theme='light'] {
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-glass: rgba(255, 255, 255, 0.85);
  --bg-surface-hover: #f1f5f9;
  --bg-sidebar: #ffffff;
  --bg-topbar: rgba(255, 255, 255, 0.9);

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-medium: rgba(0, 0, 0, 0.14);
  --border-focus: #4f46e5;
  --border-glass: rgba(0, 0, 0, 0.08);

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #6366f1;
  --primary-glow: rgba(79, 70, 229, 0.2);
  --primary-surface: rgba(79, 70, 229, 0.08);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06), 0 0 0 1px var(--border-subtle);
}

/* ─── Global Reset & Baseline ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-app);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-full);
}
[data-theme='light'] ::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.16);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: 1.85rem; line-height: 1.25; }
h2 { font-size: 1.45rem; line-height: 1.3; }
h3 { font-size: 1.15rem; line-height: 1.35; }
h4 { font-size: 1rem; line-height: 1.4; }

p {
  color: var(--text-secondary);
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--primary);
}

/* ─── UI Utilities & Components ─── */

/* Glass Card */
.glass-card {
  background: var(--bg-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

[data-theme='light'] .glass-card:hover {
  border-color: rgba(0, 0, 0, 0.16);
}

/* Gradient Text */
.gradient-text {
  background: linear-gradient(135deg, #a5b4fc 0%, #6366f1 50%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  user-select: none;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
  color: #ffffff;
  box-shadow: 0 2px 10px var(--primary-glow);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #7175f8 0%, #5850ec 100%);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  border-color: var(--border-medium);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover {
  background: var(--primary-surface);
  color: var(--primary-light);
}

.btn-danger {
  background: var(--danger-surface);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}
.btn-danger:hover {
  background: var(--danger);
  color: #ffffff;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Badges & Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.2;
  text-transform: capitalize;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.badge-success {
  background: var(--success-surface);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.badge-success .badge-dot { background: #10b981; box-shadow: 0 0 6px #10b981; }

.badge-warning {
  background: var(--warning-surface);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.badge-warning .badge-dot { background: #f59e0b; box-shadow: 0 0 6px #f59e0b; }

.badge-danger {
  background: var(--danger-surface);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.badge-danger .badge-dot { background: #ef4444; box-shadow: 0 0 6px #ef4444; }

.badge-primary {
  background: var(--primary-surface);
  color: var(--primary-light);
  border: 1px solid rgba(99, 102, 241, 0.3);
}
.badge-primary .badge-dot { background: var(--primary); box-shadow: 0 0 6px var(--primary); }

.badge-neutral {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}
.badge-neutral .badge-dot { background: var(--text-muted); }

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-label {
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-control, .input-search, select.form-control {
  width: 100%;
  padding: 9px 13px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-control:focus, .input-search:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

textarea.form-control {
  min-height: 90px;
  resize: vertical;
  line-height: 1.5;
}

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

@keyframes pulseGlow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.15); }
}

.animate-fade {
  animation: fadeIn var(--transition-normal) ease-out forwards;
}

.pulse-active {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulseGlow 2s infinite ease-in-out;
}