/* ERH 26001 AS - Lithuwell
   Unique 2026 design: Sage + Warm Neutral
   Sticky left sidebar, clean cards with thin borders
   Different from all previous (no masonry, no ice-blue)
*/

:root {
  --sage: #5C7A6B;
  --sage-light: #7BA88F;
  --bg: #F4F7F4;
  --card: #FFFFFF;
  --text: #1A2F23;
  --text-light: #5A6B60;
  --border: #D1D9D3;
  --radius: 12px;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

/* Sticky Sidebar */
#sidebar {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Cards - thin border, subtle shadow */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgb(26 47 35 / 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px rgb(26 47 35 / 0.08);
}

/* Buttons - square with thin border */
.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid var(--sage);
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary {
  background: var(--sage);
  color: white;
  border-color: var(--sage);
}

.btn-primary:hover {
  background: #4A614F;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--sage);
}

.btn-secondary:hover {
  background: #E8F0E9;
}

/* Sidebar nav */
.sidebar-link {
  display: block;
  padding: 0.65rem 1rem;
  border-radius: 8px;
  color: var(--text-light);
  font-weight: 500;
  transition: all 0.2s ease;
}

.sidebar-link:hover {
  background: #E8F0E9;
  color: var(--sage);
}

.sidebar-link.active {
  background: #E8F0E9;
  color: var(--sage);
  font-weight: 600;
}

/* Article content */
.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: 70ch;
}

.article-content h2 {
  font-size: 1.55rem;
  font-weight: 700;
  margin-top: 2.8rem;
  margin-bottom: 1rem;
  color: var(--sage);
  border-left: 5px solid var(--sage-light);
  padding-left: 1rem;
}

/* Tags */
.tag {
  display: inline-block;
  padding: 0.2rem 0.75rem;
  background: #E8F0E9;
  color: var(--sage);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
}

/* Form inputs */
input, textarea, select {
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1.1rem;
  transition: border-color 0.3s ease;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--sage-light);
  box-shadow: 0 0 0 3px rgba(92, 122, 107, 0.1);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #F4F7F4 0%, #E8F0E9 100%);
}

/* Footer */
footer {
  background: #1A2F23;
  color: #A8B5A8;
}

footer a:hover {
  color: #7BA88F;
}