.skip-link {
  background: var(--color-primary);
  color: #fff;
  left: 1rem;
  padding: .75rem 1rem;
  position: fixed;
  top: .75rem;
  transform: translateY(-140%);
  z-index: 20;
}
.skip-link:focus { transform: translateY(0); }
.site-header {
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  border-bottom: 1px solid transparent;
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header.is-scrolled { border-color: var(--color-border); box-shadow: var(--shadow-sm); }
.nav {
  align-items: center;
  display: flex;
  gap: var(--space-4);
  justify-content: space-between;
  min-height: 74px;
}
.brand { align-items: center; display: inline-flex; gap: .65rem; font-weight: 800; }
.brand img { width: 180px; height: auto; }
.nav__links { align-items: center; display: flex; gap: .35rem; }
.nav__links a,
.nav__dropdown summary {
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-weight: 680;
  padding: .65rem .75rem;
}
.nav__links a:hover,
.nav__links a[aria-current="page"],
.nav__dropdown summary:hover {
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  color: var(--color-primary);
}
.nav__dropdown {
  position: relative;
}
.nav__dropdown summary {
  cursor: pointer;
  list-style: none;
}
.nav__dropdown summary::-webkit-details-marker {
  display: none;
}
.nav__dropdown summary::after {
  content: "▾";
  font-size: .75rem;
  margin-left: .35rem;
}
.nav__menu {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: grid;
  gap: .2rem;
  left: 0;
  min-width: 210px;
  padding: .5rem;
  position: absolute;
  top: calc(100% + .5rem);
}
.nav__menu a {
  display: block;
  white-space: nowrap;
}
.nav__actions { align-items: center; display: flex; gap: .5rem; }
.icon-button, .menu-button {
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  display: inline-flex;
  height: 42px;
  justify-content: center;
  width: 42px;
}
.menu-button { display: none; }
.button {
  align-items: center;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  display: inline-flex;
  font-weight: 780;
  justify-content: center;
  min-height: 44px;
  padding: .78rem 1rem;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}
.button:hover { transform: translateY(-1px); }
.button--primary { background: var(--color-primary); color: #fff; }
.button--secondary { background: var(--color-surface); border-color: var(--color-border); color: var(--color-text); }
.button-row { display: flex; flex-wrap: wrap; gap: .75rem; }
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5);
}
.card--link { transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.card--link:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.tag, .badge {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-size: .82rem;
  font-weight: 780;
  min-height: 28px;
  padding: .25rem .7rem;
  width: fit-content;
}
.tag { background: color-mix(in srgb, var(--color-primary) 12%, transparent); color: var(--color-primary); }
.badge { background: color-mix(in srgb, var(--color-accent) 14%, transparent); color: var(--color-accent); }
.icon {
  align-items: center;
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  display: inline-flex;
  height: 44px;
  justify-content: center;
  width: 44px;
}
.visual-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  padding: clamp(.75rem, 2vw, 1.2rem);
}
.feature-list { display: grid; gap: .75rem; list-style: none; margin: 0; padding: 0; }
.feature-list li { align-items: flex-start; display: flex; gap: .65rem; color: var(--color-muted); }
.feature-list li::before { color: var(--color-success); content: "✓"; font-weight: 900; }
.form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
}
.field { display: grid; gap: .35rem; }
.field label { font-weight: 760; }
.input, .textarea, .select {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  min-height: 44px;
  padding: .75rem .85rem;
  width: 100%;
}
.textarea { min-height: 128px; resize: vertical; }
.alert {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.alert--success { background: color-mix(in srgb, var(--color-success) 12%, transparent); color: var(--color-success); }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
th, td { border-bottom: 1px solid var(--color-border); padding: .9rem; text-align: left; }
th { color: var(--color-text); font-size: .9rem; }
.accordion { display: grid; gap: .75rem; }
.accordion details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.accordion summary { cursor: pointer; font-weight: 780; }
.site-footer {
  background: #0f172a;
  color: #e2e8f0;
  padding-block: var(--space-7);
}
.site-footer a, .site-footer p { color: #cbd5e1; }
.footer-grid { display: grid; gap: var(--space-6); grid-template-columns: 1.4fr repeat(3, 1fr); }
.footer-list { display: grid; gap: .55rem; list-style: none; margin: .75rem 0 0; padding: 0; }
.footer-bottom { border-top: 1px solid #334155; margin-top: var(--space-6); padding-top: var(--space-5); }
@media (max-width: 900px) {
  .menu-button { display: inline-flex; }
  .nav__links {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: none;
    flex-direction: column;
    left: 1rem;
    padding: .75rem;
    position: absolute;
    right: 1rem;
    top: 82px;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { width: 100%; }
  .nav__dropdown { width: 100%; }
  .nav__dropdown summary { display: block; width: 100%; }
  .nav__menu {
    border: 0;
    box-shadow: none;
    min-width: 0;
    padding: .35rem 0 0 .65rem;
    position: static;
  }
  .nav__menu a { white-space: normal; }
  .footer-grid { grid-template-columns: 1fr; }
}