/* ScholarForge Shared Design System */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=DM+Sans:ital,wght@0,400;0,500;1,400&display=swap');

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

:root {
  --ink: #0f1419;
  --chalk: #fafaf8;
  --warm: #f5f0e8;
  --accent: #1a3a2a;
  --accent-light: #2d5f42;
  --gold: #c4973b;
  --gold-soft: #e8d5a8;
  --muted: #6b7280;
  --border: #e2ddd4;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --success: #16a34a;
  --success-light: #f0fdf4;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  color: var(--ink);
  background: var(--chalk);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: 'Space Grotesk', sans-serif; line-height: 1.15; }

/* =================== APP NAV =================== */
.app-nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.app-nav .logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--accent);
  text-decoration: none;
}

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

.app-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.app-nav .nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.app-nav .nav-links a:hover,
.app-nav .nav-links a.active { color: var(--accent); }

.app-nav .nav-links .btn-sm {
  padding: 0.45rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.2s;
}

.app-nav .nav-links .btn-sm:hover { background: var(--accent-light); }

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

.nav-user .user-name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink);
}

.nav-user .logout-btn {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  transition: color 0.2s;
}

.nav-user .logout-btn:hover { color: var(--danger); }

/* =================== PAGE LAYOUT =================== */
.page-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 6rem 2rem 3rem;
}

.page-container.narrow {
  max-width: 520px;
}

.page-container.wide {
  max-width: 1100px;
}

/* =================== CARDS =================== */
.card {
  background: var(--chalk);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.card.warm {
  background: var(--warm);
  border-color: var(--gold-soft);
}

.card.accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

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

.form-group label {
  display: block;
  font-weight: 500;
  font-size: 0.88rem;
  margin-bottom: 0.4rem;
  color: var(--ink);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(196, 151, 59, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 200px;
  line-height: 1.7;
}

/* =================== BUTTONS =================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.75rem;
  border: none;
  border-radius: 8px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-light); }
.btn-primary:disabled {
  background: var(--muted);
  cursor: not-allowed;
  opacity: 0.6;
}

.btn-gold {
  background: var(--gold);
  color: #fff;
}
.btn-gold:hover { background: #b38832; }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--ink);
}
.btn-outline:hover { border-color: var(--gold); background: var(--warm); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  padding: 0.5rem 1rem;
}
.btn-ghost:hover { color: var(--ink); }

.btn-block { width: 100%; }

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.05rem;
}

/* =================== ALERTS =================== */
.alert {
  padding: 0.85rem 1.25rem;
  border-radius: 8px;
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  display: none;
}

.alert.show { display: block; }

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

.alert-success {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

/* =================== SECTION LABELS =================== */
.section-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* =================== SKILL BARS =================== */
.skill-bar-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.skill-bar {
  padding: 1.25rem;
  background: var(--chalk);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.skill-bar .skill-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
}

.skill-bar .skill-name {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink);
}

.skill-bar .skill-score {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}

.skill-bar .skill-weight {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

.skill-bar .bar-track {
  height: 8px;
  background: var(--warm);
  border-radius: 4px;
  overflow: hidden;
}

.skill-bar .bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.8s ease-out;
  background: var(--accent);
}

.skill-bar .bar-fill.gold { background: var(--gold); }

/* =================== GROWTH BAND INDICATOR =================== */
.growth-band {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.growth-band.emerging { background: #fef3cd; color: #856404; }
.growth-band.progressing { background: #d1ecf1; color: #0c5460; }
.growth-band.strong { background: #d4edda; color: #155724; }
.growth-band.advanced { background: var(--gold-soft); color: var(--accent); }

/* =================== BADGE =================== */
.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.badge-category {
  background: var(--warm);
  color: var(--accent);
  border: 1px solid var(--border);
}

.badge-difficulty {
  background: var(--gold-soft);
  color: var(--gold);
}

/* =================== LOADING =================== */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 0.5rem;
}

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

.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  color: var(--muted);
}

.loading-overlay .spinner-lg {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 1rem;
}

/* =================== EMPTY STATE =================== */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
}

.empty-state h3 {
  font-size: 1.3rem;
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

/* =================== UTILITIES =================== */
.text-muted { color: var(--muted); }
.text-accent { color: var(--accent); }
.text-gold { color: var(--gold); }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.gap-1 { gap: 0.5rem; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* =================== DIVIDER =================== */
.divider {
  width: 64px;
  height: 3px;
  background: var(--gold);
  border-radius: 2px;
}

/* =================== RESPONSIVE =================== */
@media (max-width: 768px) {
  .app-nav { padding: 0.85rem 1.25rem; }
  .page-container { padding: 5rem 1.25rem 2rem; }
  .skill-bar-group { grid-template-columns: 1fr; }
  .card { padding: 1.5rem; }
}

@media (max-width: 480px) {
  .app-nav .nav-links { gap: 0.75rem; }
  .btn-lg { padding: 0.85rem 1.5rem; font-size: 0.95rem; }
}