/* ============================================================
   Interview Edge — Design System
   shadcn/ui-inspired, Vanilla CSS, Light + Dark mode
   Target: 18–35 aesthetic — clean, modern, confident
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  /* Brand */
  --brand-primary:   #6366f1;   /* indigo-500 */
  --brand-secondary: #8b5cf6;   /* violet-500 */
  --brand-accent:    #06b6d4;   /* cyan-500   */

  /* Light mode surfaces */
  --bg-base:         #ffffff;
  --bg-subtle:       #f8fafc;
  --bg-muted:        #f1f5f9;
  --bg-overlay:      rgba(0,0,0,0.4);

  /* Light mode borders */
  --border:          #e2e8f0;
  --border-strong:   #cbd5e1;

  /* Light mode text */
  --text-primary:    #0f172a;
  --text-secondary:  #475569;
  --text-muted:      #94a3b8;
  --text-inverse:    #ffffff;

  /* Semantic */
  --success:         #22c55e;
  --warning:         #f59e0b;
  --danger:          #ef4444;
  --info:            #3b82f6;

  /* Card / panel */
  --card-bg:         #ffffff;
  --card-border:     #e2e8f0;
  --card-shadow:     0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --card-shadow-lg:  0 10px 25px rgba(0,0,0,0.1);

  /* Sidebar */
  --sidebar-width:        240px;
  --sidebar-width-collapsed: 60px;
  --sidebar-bg:      #f5f3ff;
  --sidebar-border:  rgba(139, 92, 246, 0.15);
  --sidebar-text:    #6d28d9;
  --sidebar-text-active: #3b0764;
  --sidebar-active-bg: rgba(109, 40, 217, 0.12);
  --sidebar-hover-bg: rgba(109, 40, 217, 0.06);

  /* Header */
  --header-height:   60px;
  --header-bg:       #ffffff;
  --header-border:   #e2e8f0;

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

  /* Spacing scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;

  /* Transition */
  --transition: 150ms ease;
  --transition-slow: 300ms ease;

  /* Z-index */
  --z-dropdown: 100;
  --z-modal:    200;
  --z-toast:    300;
  --z-sidebar:   50;
  --z-header:    40;
}

/* ── Dark Mode ─────────────────────────────────────────────── */
[data-theme="dark"] {
  --bg-base:         #0f172a;
  --bg-subtle:       #1e293b;
  --bg-muted:        #334155;
  --border:          #1e293b;
  --border-strong:   #334155;
  --text-primary:    #f8fafc;
  --text-secondary:  #94a3b8;
  --text-muted:      #475569;
  --card-bg:         #1e293b;
  --card-border:     #334155;
  --card-shadow:     0 1px 3px rgba(0,0,0,0.3);
  --card-shadow-lg:  0 10px 25px rgba(0,0,0,0.4);
  --header-bg:       #0f172a;
  --header-border:   #1e293b;
  --sidebar-bg:      #020617;
  --sidebar-border:  rgba(255,255,255,0.06);
  --sidebar-text:    #94a3b8;
  --sidebar-text-active: #ffffff;
  --sidebar-active-bg: rgba(99,102,241,0.15);
  --sidebar-hover-bg: rgba(255,255,255,0.05);
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition-slow), color var(--transition-slow);
}
a { color: var(--brand-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
input, textarea, select, button { font-family: inherit; }

/* ── Layout Shell ──────────────────────────────────────────── */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  margin-top: var(--header-height);
  padding: var(--space-6);
  transition: margin-left var(--transition-slow);
}

.main-content.sidebar-collapsed {
  margin-left: var(--sidebar-width-collapsed);
}

.page-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* ── Header ────────────────────────────────────────────────── */
.app-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  gap: var(--space-4);
  z-index: var(--z-header);
  transition: background var(--transition-slow);
}

.app-header .logo {
  font-size: var(--text-xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.header-spacer { flex: 1; }

.header-company-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 2px var(--space-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.trial-badge {
  background: linear-gradient(135deg, var(--warning), #f97316);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Sidebar ───────────────────────────────────────────────── */
.app-sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  overflow-y: auto;
  overflow-x: hidden;
  transition: width var(--transition-slow);
  z-index: var(--z-sidebar);
  display: flex;
  flex-direction: column;
}

.app-sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
}

.sidebar-nav { flex: 1; padding: var(--space-4) var(--space-2); }

.nav-section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sidebar-text);
  padding: var(--space-3) var(--space-3) var(--space-1);
  opacity: 0.6;
  white-space: nowrap;
  overflow: hidden;
}

.app-sidebar.collapsed .nav-section-label { opacity: 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--sidebar-text);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  overflow: hidden;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: var(--sidebar-hover-bg);
  color: var(--sidebar-text-active);
  text-decoration: none;
}

.nav-item.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-text-active);
}

.nav-item .nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  stroke: currentColor;
  fill: none;
}

.nav-item .nav-label {
  font-size: var(--text-sm);
  font-weight: 500;
  transition: opacity var(--transition-slow);
}

.app-sidebar.collapsed .nav-label { opacity: 0; width: 0; }

/* ── Footer ────────────────────────────────────────────────── */
.app-footer {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  padding: var(--space-4) var(--space-6);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  padding: var(--space-6);
  transition: box-shadow var(--transition);
}

.card:hover { box-shadow: var(--card-shadow-lg); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: 2px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

/* Stats card */
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.stat-value {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 500;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none !important;
  outline: none;
}

.btn:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

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

.btn-primary {
  background: var(--brand-primary);
  color: white;
  border-color: var(--brand-primary);
}
.btn-primary:hover:not(:disabled) {
  background: #4f46e5;
  border-color: #4f46e5;
}

.btn-secondary {
  background: var(--bg-muted);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) { background: var(--border); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) { background: var(--bg-muted); color: var(--text-primary); }

.btn-danger {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}
.btn-danger:hover:not(:disabled) { background: #dc2626; }

.btn-outline {
  background: transparent;
  color: var(--brand-primary);
  border-color: var(--brand-primary);
}
.btn-outline:hover:not(:disabled) { background: var(--brand-primary); color: white; }

.btn-sm { padding: var(--space-1) var(--space-3); font-size: var(--text-xs); }
.btn-lg { padding: var(--space-3) var(--space-6); font-size: var(--text-base); }
.btn-full { width: 100%; }

.btn-loading .btn-spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ── Forms ─────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: var(--space-1); margin-bottom: var(--space-4); }

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.form-label .required { color: var(--danger); margin-left: 2px; }

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: var(--bg-base);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.form-input::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 100px; }

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--danger);
}

.form-hint { font-size: var(--text-xs); color: var(--text-muted); }
.form-error { font-size: var(--text-xs); color: var(--danger); }

/* Toggle / Switch */
.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.toggle input { display: none; }

.toggle-track {
  width: 40px; height: 22px;
  background: var(--border-strong);
  border-radius: var(--radius-full);
  transition: background var(--transition);
  position: relative;
}

.toggle-thumb {
  position: absolute;
  top: 3px; left: 3px;
  width: 16px; height: 16px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle input:checked ~ .toggle-track { background: var(--brand-primary); }
.toggle input:checked ~ .toggle-track .toggle-thumb { transform: translateX(18px); }

/* Radio group */
.radio-group { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.radio-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  font-size: var(--text-sm);
}

.radio-option:has(input:checked) {
  border-color: var(--brand-primary);
  background: rgba(99,102,241,0.08);
  color: var(--brand-primary);
}

.radio-option input { accent-color: var(--brand-primary); }

/* ── Badges ────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: capitalize;
}

.badge-success { background: rgba(34,197,94,0.12); color: #16a34a; }
.badge-warning { background: rgba(245,158,11,0.12); color: #d97706; }
.badge-danger  { background: rgba(239,68,68,0.12);  color: #dc2626; }
.badge-info    { background: rgba(59,130,246,0.12);  color: #2563eb; }
.badge-muted   { background: var(--bg-muted); color: var(--text-muted); }
.badge-primary { background: rgba(99,102,241,0.12); color: var(--brand-primary); }

/* ── Tables ────────────────────────────────────────────────── */
.table-wrapper { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--card-border); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

thead { background: var(--bg-subtle); }

th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-subtle); }

/* ── Modals ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--space-4);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--card-shadow-lg);
  padding: var(--space-6);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition);
}

.modal-overlay.open .modal { transform: scale(1) translateY(0); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.modal-title { font-size: var(--text-xl); font-weight: 700; }
.modal-close { background: none; border: none; cursor: pointer; color: var(--text-muted); padding: var(--space-1); border-radius: var(--radius-sm); }
.modal-close:hover { color: var(--text-primary); background: var(--bg-muted); }

/* ── Toasts ────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: var(--z-toast);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow-lg);
  font-size: var(--text-sm);
  max-width: 360px;
  animation: slideInRight 0.2s ease;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error   { border-left: 4px solid var(--danger);  }
.toast.warning { border-left: 4px solid var(--warning); }
.toast.info    { border-left: 4px solid var(--info);    }

/* ── Page header ───────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  gap: var(--space-4);
  flex-wrap: wrap;
}

.page-title { font-size: var(--text-2xl); font-weight: 700; }
.page-subtitle { font-size: var(--text-sm); color: var(--text-muted); margin-top: var(--space-1); }

/* ── Empty state ───────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-6);
  color: var(--text-muted);
}

.empty-state svg { margin: 0 auto var(--space-4); opacity: 0.4; }
.empty-state h3  { font-size: var(--text-lg); font-weight: 600; color: var(--text-secondary); margin-bottom: var(--space-2); }
.empty-state p   { font-size: var(--text-sm); }

/* ── Loading spinner ───────────────────────────────────────── */
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--brand-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

/* ── Score ring ────────────────────────────────────────────── */
.score-ring {
  position: relative;
  width: 80px; height: 80px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.score-ring svg { position: absolute; transform: rotate(-90deg); }
.score-ring-value { font-size: var(--text-xl); font-weight: 700; }

/* ── Tag / chip ────────────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  background: var(--bg-muted);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
}

/* ── Divider ───────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: var(--space-4) 0;
}

/* ── Hamburger ─────────────────────────────────────────────── */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  border: none;
  background: none;
  transition: background var(--transition);
}
.hamburger:hover { background: var(--bg-muted); }
.hamburger span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-slow);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Theme toggle ──────────────────────────────────────────── */
.theme-toggle {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.theme-toggle:hover { background: var(--border); color: var(--text-primary); }

/* ── Avatar ────────────────────────────────────────────────── */
.avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-sm);
  font-weight: 600;
  flex-shrink: 0;
}

/* ── Dropdown ──────────────────────────────────────────────── */
.dropdown { position: relative; }

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-1));
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow-lg);
  min-width: 180px;
  overflow: hidden;
  z-index: var(--z-dropdown);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: all var(--transition);
}

.dropdown-menu.open { opacity: 1; pointer-events: all; transform: translateY(0); }

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition);
}

.dropdown-item:hover { background: var(--bg-subtle); }
.dropdown-item.danger { color: var(--danger); }

/* ── Tabs ──────────────────────────────────────────────────── */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: var(--space-5); }

.tab {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--transition);
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.tab:hover { color: var(--text-primary); }
.tab.active { color: var(--brand-primary); border-bottom-color: var(--brand-primary); }

/* ── Animations ────────────────────────────────────────────── */
@keyframes spin { to { transform: rotate(360deg); } }

@keyframes slideInRight {
  from { transform: translateX(20px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

.animate-fade-in { animation: fadeIn 0.3s ease forwards; }
.animate-pulse   { animation: pulse 2s ease infinite; }

/* ── Utilities ─────────────────────────────────────────────── */
.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2  { gap: var(--space-2); }
.gap-3  { gap: var(--space-3); }
.gap-4  { gap: var(--space-4); }
.gap-6  { gap: var(--space-6); }
.w-full { width: 100%; }
.mt-4   { margin-top: var(--space-4); }
.mb-4   { margin-bottom: var(--space-4); }
.text-sm  { font-size: var(--text-sm); }
.text-muted { color: var(--text-muted); }
.font-bold  { font-weight: 700; }
.truncate   { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden     { display: none !important; }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .main-content { margin-left: 0 !important; padding: var(--space-4); }
  .app-sidebar  { transform: translateX(-100%); }
  .app-sidebar.mobile-open { transform: translateX(0); width: var(--sidebar-width); }
  .card-grid    { grid-template-columns: 1fr; }
  .page-header  { flex-direction: column; }
}