/* TrainKit Shared Design System */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=DM+Sans:wght@400;500;600&display=swap');

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

:root {
  --bg-dark: #0a0f1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --accent: #22d3a7;
  --accent-glow: rgba(34, 211, 167, 0.15);
  --accent-hover: #1bb892;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(148, 163, 184, 0.08);
  --border-light: rgba(148, 163, 184, 0.15);
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #22c55e;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  letter-spacing: -0.02em;
}

/* Nav */
.app-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(10, 15, 26, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.app-nav .logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--text-primary);
  text-decoration: none;
}

.app-nav .logo span { color: var(--accent); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-user {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.nav-btn {
  font-size: 0.85rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.4rem 1rem;
  border-radius: 8px;
  border: 1px solid rgba(34, 211, 167, 0.2);
  cursor: pointer;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-btn:hover { background: rgba(34, 211, 167, 0.25); }

.nav-btn.danger {
  color: var(--text-secondary);
  background: transparent;
  border-color: transparent;
}

.nav-btn.danger:hover { color: var(--text-primary); }

/* Page container */
.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 6rem 2rem 3rem;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: border-color 0.2s;
}

.card:hover { border-color: var(--border-light); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-dark);
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover { background: var(--bg-card-hover); }

.btn-sm { font-size: 0.85rem; padding: 0.5rem 1rem; }

.btn-full { width: 100%; }

/* Form */
.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-dark);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
}

.form-group input::placeholder { color: var(--text-muted); }

.form-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  display: none;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.form-error.visible { display: block; }

/* Tags/Badges */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
}

.badge-onboarding { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.badge-compliance { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.badge-skills { background: rgba(139, 92, 246, 0.15); color: #a78bfa; }
.badge-success { background: rgba(34, 197, 94, 0.15); color: #4ade80; }

/* Progress bar */
.progress-bar {
  height: 6px;
  background: rgba(148, 163, 184, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.5s ease;
}

/* Grid */
.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; }

/* Stats */
.stat-card {
  text-align: center;
  padding: 1.5rem;
}

.stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.25rem;
}

/* Loading */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  color: var(--text-secondary);
  gap: 1rem;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-light);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-secondary);
}

.empty-state h3 {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.empty-state p { max-width: 400px; margin: 0 auto 1.5rem; }

/* Auth page layout */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.auth-card {
  width: 100%;
  max-width: 440px;
}

.auth-card h1 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.auth-card .subtitle {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.auth-card .auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.auth-card .auth-footer a {
  color: var(--accent);
  text-decoration: none;
}

.auth-card .auth-footer a:hover { text-decoration: underline; }

/* Role tags input */
.role-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.role-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-glow);
  color: var(--accent);
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  font-size: 0.85rem;
  border: 1px solid rgba(34, 211, 167, 0.2);
}

.role-tag .remove {
  cursor: pointer;
  font-size: 1rem;
  opacity: 0.7;
}

.role-tag .remove:hover { opacity: 1; }

/* Lesson content */
.lesson-section { margin-bottom: 2rem; }

.lesson-section h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.lesson-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* Quiz */
.quiz-container { margin-top: 2rem; }

.quiz-question {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.quiz-question h4 {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--bg-dark);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  margin-bottom: 0.5rem;
  transition: all 0.2s;
  font-family: 'DM Sans', sans-serif;
}

.quiz-option:hover { border-color: var(--accent); background: rgba(34, 211, 167, 0.05); }
.quiz-option.correct { border-color: var(--success); background: rgba(34, 197, 94, 0.1); color: var(--success); }
.quiz-option.wrong { border-color: var(--danger); background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.quiz-option.disabled { pointer-events: none; opacity: 0.7; }

/* Mobile */
@media (max-width: 768px) {
  .page { padding: 5rem 1.25rem 2rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .app-nav { padding: 0.75rem 1.25rem; }
  .stat-value { font-size: 1.8rem; }
}