/* ===== Header ===== */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background var(--transition), border-color var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  gap: 16px;
}

.site-branding { flex-shrink: 0; }

.site-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.site-title a { background: none; -webkit-text-fill-color: initial; color: var(--primary); }

.site-description {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: -2px;
}

/* Navigation */
.main-nav { flex-shrink: 0; }

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 2px;
}

.main-nav a {
  display: block;
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}

.main-nav a:hover,
.main-nav .current-menu-item > a {
  color: var(--primary);
  background: var(--primary-bg);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.header-btn {
  width: 38px;
  height: 38px;
  border: none;
  border-radius: 50%;
  background: var(--bg-alt);
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  line-height: 1;
}

.header-btn:hover {
  background: var(--primary-bg);
  color: var(--primary);
}

.header-btn-link {
  font-size: 14px;
  text-decoration: none;
}

.menu-toggle { display: none; }

/* (responsive rules moved to _mobile.css) */