/*
 * CognioCloud LMS — Main Stylesheet
 * Design: Deep Indigo + Royal Blue + Sky Blue
 * Matches demo.cogniocloud.com visual language
 */

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

:root {
  --primary: #2563eb;
  --accent: #0ea5e9;
  --dark: #1e1b4b;
  --primary-light: #eff6ff;
  --primary-hover: #1d4ed8;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --success: #059669;
  --success-light: #ecfdf5;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --sidebar-width: 260px;
  --topbar-height: 64px;
  --radius: 10px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.3;
}

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

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

/* ─── Sidebar ─── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--dark);
  color: white;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 40;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo { height: 32px; width: auto; }
.sidebar-logo-icon { width: 32px; height: 32px; color: var(--accent); }
.sidebar-brand { font-family: 'Plus Jakarta Sans', sans-serif; font-weight: 800; font-size: 1.125rem; letter-spacing: -0.02em; }

.sidebar-nav {
  flex: 1;
  padding: 1rem 0.75rem;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.875rem;
  border-radius: 8px;
  color: rgba(255,255,255,0.65);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.15s ease;
  margin-bottom: 2px;
}

.nav-item:hover {
  color: white;
  background: rgba(255,255,255,0.08);
}

.nav-item.active {
  color: white;
  background: var(--primary);
  box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}

.nav-icon { width: 20px; height: 20px; flex-shrink: 0; }

.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.user-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.user-info { display: flex; flex-direction: column; min-width: 0; }
.user-name { font-size: 0.8125rem; font-weight: 600; color: white; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 0.6875rem; color: rgba(255,255,255,0.5); text-transform: capitalize; }

.logout-link { color: rgba(255,255,255,0.5) !important; }
.logout-link:hover { color: #f87171 !important; background: rgba(248,113,113,0.1) !important; }

/* ─── Main Wrapper ─── */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ─── Top Bar ─── */
.topbar {
  height: var(--topbar-height);
  background: white;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 30;
}

.sidebar-toggle { display: none; background: none; border: none; color: var(--gray-600); cursor: pointer; padding: 0.25rem; }
.page-title { font-size: 1.125rem; font-weight: 700; color: var(--gray-900); }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 1rem; }

.xp-badge {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  background: var(--warning-light);
  color: var(--warning);
  border-radius: 20px;
  font-size: 0.8125rem;
  font-weight: 600;
}

/* ─── Page Content ─── */
.page-content {
  flex: 1;
  padding: 1.5rem;
  max-width: 1400px;
}

/* ─── Cards ─── */
.card {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title { font-size: 1rem; font-weight: 700; color: var(--gray-900); }
.card-body { padding: 1.5rem; }

/* ─── Stat Cards ─── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-icon.green { background: var(--success-light); color: var(--success); }
.stat-icon.amber { background: var(--warning-light); color: var(--warning); }
.stat-icon.purple { background: #f3e8ff; color: #7c3aed; }

.stat-value { font-size: 1.5rem; font-weight: 800; color: var(--gray-900); line-height: 1; }
.stat-label { font-size: 0.8125rem; color: var(--gray-500); margin-top: 0.25rem; }

/* ─── Tables ─── */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-500);
  border-bottom: 2px solid var(--gray-200);
}

.data-table td {
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}

.data-table tr:hover td { background: var(--gray-50); }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  line-height: 1.5;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); color: white; }
.btn-secondary { background: var(--gray-100); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-200); color: var(--gray-800); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #047857; color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; color: white; }
.btn-outline { background: transparent; border: 1px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }

/* ─── Forms ─── */
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.375rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 0.875rem;
  color: var(--gray-900);
  background: white;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-textarea { min-height: 100px; resize: vertical; }

/* ─── Badges ─── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  border-radius: 20px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-amber { background: var(--warning-light); color: var(--warning); }
.badge-red { background: var(--danger-light); color: var(--danger); }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }
.badge-purple { background: #f3e8ff; color: #7c3aed; }

/* ─── Progress Bar ─── */
.progress-bar {
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  transition: width 0.5s ease;
}

/* ─── Alerts ─── */
.alert {
  padding: 0.875rem 1.25rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  margin: 0 1.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.alert-success { background: var(--success-light); color: var(--success); border: 1px solid #a7f3d0; }
.alert-error { background: var(--danger-light); color: var(--danger); border: 1px solid #fecaca; }
.alert-info { background: var(--primary-light); color: var(--primary); border: 1px solid #bfdbfe; }

/* ─── Grid Layouts ─── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }

/* ─── Course Cards ─── */
.course-card {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.course-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.course-thumb {
  height: 160px;
  background: linear-gradient(135deg, var(--primary), var(--dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
}

.course-card-body { padding: 1.25rem; }
.course-card-title { font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.375rem; }
.course-card-meta { font-size: 0.8125rem; color: var(--gray-500); margin-bottom: 0.75rem; }

/* ─── Leaderboard ─── */
.leaderboard-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--gray-100);
}

.leaderboard-rank {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.8125rem;
  flex-shrink: 0;
}

.rank-1 { background: linear-gradient(135deg, #fbbf24, #f59e0b); color: white; }
.rank-2 { background: linear-gradient(135deg, #d1d5db, #9ca3af); color: white; }
.rank-3 { background: linear-gradient(135deg, #d97706, #b45309); color: white; }
.rank-default { background: var(--gray-100); color: var(--gray-600); }

/* ─── Badge Grid ─── */
.badge-card {
  text-align: center;
  padding: 1.5rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  background: white;
  transition: transform 0.2s ease;
}

.badge-card:hover { transform: translateY(-2px); }
.badge-card.earned { border-color: var(--primary); background: var(--primary-light); }
.badge-card.locked { opacity: 0.5; filter: grayscale(0.5); }

.badge-icon-large {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
  font-size: 1.5rem;
}

/* ─── Color Picker ─── */
.color-picker-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.color-swatch {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 2px solid var(--gray-200);
  cursor: pointer;
}

/* ─── Login Page ─── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--dark) 0%, #312e81 50%, var(--primary) 100%);
  padding: 1rem;
}

.login-card {
  background: white;
  border-radius: 16px;
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}

.login-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.login-logo-icon { width: 48px; height: 48px; color: var(--primary); margin: 0 auto 0.75rem; display: block; }
.login-brand { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 1.5rem; font-weight: 800; color: var(--dark); }
.login-subtitle { font-size: 0.875rem; color: var(--gray-500); margin-top: 0.25rem; }

.login-btn {
  width: 100%;
  padding: 0.75rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.login-btn:hover { background: var(--primary-hover); }

.login-footer { text-align: center; margin-top: 1.5rem; font-size: 0.8125rem; color: var(--gray-500); }
.login-footer a { color: var(--primary); font-weight: 500; }

.login-error {
  background: var(--danger-light);
  color: var(--danger);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
  border: 1px solid #fecaca;
}

/* ─── Error Page ─── */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.error-code { font-size: 6rem; font-weight: 800; color: var(--gray-200); line-height: 1; }
.error-title { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin-top: 1rem; }
.error-message { color: var(--gray-500); margin-top: 0.5rem; max-width: 400px; }

/* ─── Empty State ─── */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--gray-400);
}

.empty-state svg { width: 48px; height: 48px; margin: 0 auto 1rem; opacity: 0.5; }
.empty-state p { font-size: 0.9375rem; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 0 0 40px rgba(0,0,0,0.3);
  }
  .main-wrapper { margin-left: 0; }
  .sidebar-toggle { display: block; }
  .page-content { padding: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .login-card { padding: 1.5rem; }
}

/* ─── Utilities ─── */
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-muted { color: var(--gray-500); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.font-mono { font-family: 'JetBrains Mono', monospace; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.w-full { width: 100%; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }