.site-header {
  position: sticky;
  top: 0;
  background: rgba(17, 20, 24, .9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(140%) blur(8px);
  z-index: 10;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  color: #cfd7df;
}

.brand__text {
  font-weight: 700;
  letter-spacing: .3px;
}

.nav a {
  color: #cfd7df;
  margin-left: 16px;
}

.nav a:hover {
  color: white;
}

.hero {
  border-bottom: 1px solid var(--line);
  padding: 56px 0;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  align-items: center;
}

.hero__copy h1 {
  font-size: 42px;
  line-height: 1.05;
  margin-bottom: 10px;
}

.hero__copy p {
  color: #cfd7df;
  margin-bottom: 14px;
}

.actions {
  display: flex;
  gap: 12px;
}

.section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.section__title {
  font-size: 26px;
  margin-bottom: 14px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.card {
  background: #141920;
  border: 1px solid #222834;
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-bottom: 6px;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  color: #b5bec8;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .cards {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile-specific tweaks */
@media (max-width: 600px) {
  .hero__copy h1 {
    font-size: 1.6rem;
  }

  .actions { flex-direction: column; align-items: stretch; }

  .cards { grid-template-columns: 1fr; }

  .nav { display: none; }
  .nav[aria-hidden="false"] { display: flex; flex-direction: column; gap: 12px; padding-top: 12px; }

  .header__inner { padding: 12px 0; }
}

/* Nav toggle */
.nav-toggle {
  display: none;
  background: transparent; border: 0; color: var(--text); cursor: pointer;
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; margin-right: 8px; }
}