.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.navbar-doc-btn {
  white-space: nowrap;
}

.navbar-doc-btn.btn-primary {
  color: var(--text-on-primary);
}

.navbar-actions .navbar-doc-btn[hidden] {
  display: none !important;
}

.navbar-actions a.navbar-doc-btn {
  text-decoration: none;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.icon-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.icon-btn svg { width: 18px; height: 18px; }

.lang-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--primary);
  color: var(--text-on-primary);
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: var(--text-on-primary);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.preview-banner {
  background: var(--primary-soft);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
  border-radius: var(--radius);
  padding: 14px 20px;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.preview-banner p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.preview-banner strong { color: var(--primary); }

/* Hero */
.hero {
  background: var(--bg-hero);
  padding: 64px 0 72px;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero h1 {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 28px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Module cards */
.section-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 32px;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  padding: 48px 0 64px;
}

.module-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.module-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.module-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.module-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.module-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  flex: 1;
}

.module-card .card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.placeholder-notice {
  background: var(--bg-elevated);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 48px 32px;
  text-align: center;
  color: var(--text-muted);
}

.placeholder-notice h3 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}