/* header styles */

/* ─── Header ─── */
header.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid rgba(229,233,242,0.6);
  transition: box-shadow var(--t);
}
.site-header.scrolled { box-shadow: 0 1px 24px rgba(11,15,31,0.06); }
.header-inner {
  display: flex; align-items: center; gap: 28px; height: 72px;
  padding: 0 28px;
  width: 100%;
}
.logo { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
.logo-svg { height: 28px; width: 128px; display: block; }
nav.main-nav { display: flex; align-items: center; gap: 4px; flex: 1; }
nav.main-nav a {
  font-size: 14px; font-weight: 500;
  color: var(--text-mute);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 100px;
  transition: color var(--t), background var(--t);
  white-space: nowrap;
}
nav.main-nav a:hover { color: var(--ink); background: var(--bg-cool); }
.header-cta { display: flex; align-items: center; gap: 10px; flex-shrink: 0; margin-left: auto; }
.header-icon-btn {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--bg-cool);
  color: var(--text);
  display: inline-flex; align-items: center; justify-content: center;
  text-decoration: none;
  transition: background var(--t), transform var(--t), color var(--t);
  border: 1px solid var(--border);
}
.header-icon-btn:hover { background: var(--ink); color: #fff; transform: translateY(-2px); }
.mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--ink); }
.mobile-nav {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  padding: 28px 24px 32px;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
  max-height: calc(100vh - 72px);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 17px; font-weight: 600;
  color: var(--ink);
  text-decoration: none;
}
.mobile-nav a:hover { background: var(--bg-cool); }
.mobile-nav .btn { margin-top: 14px; }
@media (max-width: 1024px) {
  .header-inner { padding: 0; gap: 12px; }
  .logo { flex-shrink: 0; }
  nav.main-nav { display: none; }
  .header-cta { margin-left: auto; }
  .mobile-menu-btn { display: inline-flex; flex-shrink: 0; }
}
@media (max-width: 520px) {
  .header-cta .btn.btn-primary.btn-sm { display: none !important; }
  .header-cta .btn { padding: 10px 16px; font-size: 13px; }
}
@media (max-width: 480px) {
  .header-cta .btn-primary { display: none; }
}