/* ===== Header / Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 247, 248, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.logo:hover { text-decoration: none; }
.logo-mark { flex: 0 0 auto; }

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
}
.nav a {
  color: var(--dim);
  font-size: 15px;
  font-weight: 600;
}
.nav a:hover { color: var(--ink); text-decoration: none; }
.nav .nav-legal { color: rgba(116, 118, 134, 0.7); }
.nav a.nav-cta {
  color: #ffffff;
  background: var(--gradient);
  padding: 7px 14px;
  border-radius: 10px;
}

/* Mobile: Burger */
.burger {
  display: none;
  margin-left: auto;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
}
.burger span {
  width: 20px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 720px) {
  .burger { display: flex; }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background: rgba(247, 247, 248, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 12px 22px 16px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 9px 0; font-size: 16px; width: 100%; }
}