.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
  cursor: pointer;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--color-brand);
  color: var(--color-white);
  box-shadow: 0 10px 24px rgba(22, 130, 75, 0.2);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-brand-dark);
}

.btn-secondary {
  background: var(--color-white);
  border-color: var(--color-border);
  color: var(--color-forest);
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-forest);
}

.btn-large {
  min-height: 54px;
  padding-inline: 1.5rem;
}

.card,
.feature-card,
.step-card,
.faq-item,
.booking-card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--color-shadow);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-border);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  color: var(--color-ink);
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-brand);
  color: var(--color-white);
  font-size: 1rem;
}

.brand-text {
  font-size: 1.2rem;
}

.university-picker {
  display: grid;
  gap: 0.1rem;
  flex: 0 1 190px;
}

.university-picker label {
  color: var(--color-slate);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.2;
}

.university-picker select {
  width: 100%;
  min-height: 32px;
  padding: 0 1.5rem 0 0;
  border: 0;
  background: transparent;
  color: var(--color-ink);
  font-size: 0.84rem;
  font-weight: 800;
  cursor: pointer;
}

.site-nav {
  display: none;
  align-items: center;
  gap: 1.5rem;
  color: var(--color-ink);
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-brand);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

@media (min-width: 760px) {
  .site-nav {
    display: flex;
  }
}

@media (max-width: 520px) {
  .nav-shell {
    display: grid;
    grid-template-columns: auto 1fr;
    padding: 0.65rem 0;
  }

  .university-picker {
    justify-self: end;
    max-width: 190px;
  }

  .nav-actions {
    grid-column: 1 / -1;
    justify-content: flex-end;
  }

  .nav-actions .btn {
    min-height: 42px;
    padding: 0.65rem 1rem;
  }
}