.site-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-2) var(--content-pad-x);
  border-bottom: 2px solid transparent;
  transition: .3s; background: transparent;
  max-width: 100%;
  box-sizing: border-box;
}
.site-header.scrolled {
  background: color-mix(in srgb, var(--bg) 92%, #fff 8%);
  border-color: var(--border);
}
nav { display: flex; gap: var(--space-2); align-items: center; }
.lang-toggle, .burger {
  background: none; border: 2px solid var(--border);
  padding: .5rem .75rem; font: inherit; color: inherit; cursor: pointer;
}
.burger { display: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border: 2px solid var(--border); padding: .72rem 1.05rem;
  position: relative; overflow: hidden; transition: .25s; cursor: pointer;
}
.btn::after {
  content: ''; position: absolute; inset: auto 0 0 0; height: 0;
  background: var(--accent); z-index: -1; transition: .25s;
}
.btn:hover::after { height: 100%; }
.btn-primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.btn-primary::after { background: var(--accent); }
.btn-ghost { background: transparent; }

.hero {
  display: grid;
  grid-template-columns: 1fr;
  min-width: 0;
  gap: var(--space-4);
}
@media (min-width: 1024px) {
  .hero { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }
}
.hero h1 span { display: block; }

.platform-tags {
  list-style: none; display: grid; gap: var(--space-2);
  align-content: start; padding: 0; margin: 0;
}
.platform-tags li { border: 2px solid var(--border); padding: var(--space-2) var(--space-3); }

.billing-toggle {
  display: inline-flex; border: 2px solid var(--border);
  margin: var(--space-2) 0 var(--space-3);
}
.billing-toggle button {
  border: 0; background: none; padding: .65rem 1rem;
  color: inherit; font: inherit; cursor: pointer;
}
.billing-toggle .active { background: var(--text); color: var(--bg); }

.plans {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin: var(--space-2) 0 var(--space-4);
  width: 100%;
}
@media (min-width: 961px) {
  .plans { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.plan-card {
  border: 2px solid var(--border); padding: var(--space-3);
  scroll-snap-align: start; cursor: pointer;
  display: flex; flex-direction: column; gap: var(--space-2);
}
.plan-card.active { background: var(--text); color: var(--bg); }
.plan-card h3 { margin-bottom: var(--space-1); }
.plan-card > p { font-size: 1.35rem; margin: 0; }
.plan-card ul {
  margin: 0; padding-left: 1.1rem;
  display: grid; gap: .35rem; flex: 1;
}
.plan-card .btn { margin-top: var(--space-1); align-self: flex-start; }

.steps {
  display: grid; gap: var(--space-2);
  padding-left: 1.2rem; margin: 0;
}
.platform-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
@media (min-width: 640px) {
  .platform-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .platform-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.platform-grid article {
  border: 2px solid var(--border); padding: var(--space-3);
  display: grid; gap: var(--space-1);
}
.platform-grid h3 { margin-top: var(--space-1); }
.platform-grid p { color: var(--muted); font-size: .9rem; margin: 0; }

.faq-list { display: grid; gap: var(--space-2); }
.faq-list details { border: 2px solid var(--border); padding: var(--space-2) var(--space-3); }
.faq-list summary { cursor: pointer; font-weight: 600; padding: var(--space-1) 0; }
.faq-list p { margin-top: var(--space-2); color: var(--muted); }

.support-widget { position: fixed; right: 1rem; bottom: 1rem; z-index: 20; }
.support-widget #supportToggle {
  border: 2px solid var(--border); background: var(--text); color: var(--bg);
  padding: .65rem .95rem; cursor: pointer; font: inherit;
}
.support-panel {
  display: none; background: var(--bg); border: 2px solid var(--border);
  padding: var(--space-2); margin-top: var(--space-1);
}
.support-widget.open .support-panel { display: grid; gap: var(--space-1); }
.support-panel button {
  border: 2px solid var(--border); background: transparent;
  padding: .55rem .7rem; font: inherit; cursor: pointer; text-align: left;
}

.checkout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
@media (min-width: 961px) {
  .checkout { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }
}
.checkout-form, .order-summary {
  border: 2px solid var(--border); padding: var(--space-3);
}
.checkout-form h2 { margin: var(--space-3) 0 var(--space-2); font-size: 1rem; }
.checkout-form h2:first-child { margin-top: 0; }
.checkout-form label {
  display: block; margin: var(--space-2) 0 var(--space-1);
  font-size: .88rem;
}
.order-summary { position: static; top: auto; height: fit-content; }
@media (min-width: 961px) {
  .order-summary { position: sticky; top: 5rem; }
}
.order-summary p { margin-bottom: var(--space-1); }
.order-summary hr { margin: var(--space-2) 0; border: 0; border-top: 2px solid var(--border); }
.order-summary h4 { margin: var(--space-1) 0; font-size: 1.1rem; }

.promo { display: flex; gap: var(--space-2); margin-bottom: var(--space-2); }
.promo input, .promo button {
  padding: .65rem; border: 2px solid var(--border);
  background: none; color: inherit;
}

.install-page .tabs {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  border-bottom: 2px solid var(--border);
  margin: var(--space-3) 0 var(--space-4); padding-bottom: var(--space-1);
}
.install-page .tabs button {
  background: none; border: 0; border-bottom: 2px solid transparent;
  padding: .65rem .35rem; color: inherit; cursor: pointer; font: inherit;
}
.install-page .tabs button.active { border-color: var(--text); }
.tab-content { display: none; animation: fade .3s ease; }
.tab-content.active { display: block; }
.tab-content ol { margin: 0; padding-left: 1.2rem; display: grid; gap: var(--space-2); }

.auth-card {
  max-width: 440px; margin: 10vh auto;
  border: 2px solid var(--border); padding: var(--space-4);
  display: grid; gap: var(--space-2);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}
.auth-card label { display: block; margin-top: var(--space-1); font-size: .88rem; }
.auth-card hr { margin: var(--space-2) 0; border: 0; border-top: 2px solid var(--border); }

.auth-card input,
.checkout-form input,
.checkout-form select,
.cabinet-main input,
.cabinet-main select {
  width: 100%; border: 2px solid var(--border);
  padding: .7rem; background: transparent; color: inherit;
}

.cabinet-page {
  display: grid; grid-template-columns: 220px 1fr;
  gap: var(--space-3); padding-top: var(--space-4);
}
.cabinet-sidebar {
  border: 2px solid var(--border); padding: var(--space-3);
  display: flex; flex-direction: column; justify-content: space-between;
  min-height: 68vh; gap: var(--space-3);
}
.cabinet-sidebar nav { display: grid; gap: var(--space-1); margin: var(--space-3) 0; }
.cabinet-sidebar button {
  background: none; border: 2px solid var(--border); color: inherit;
  padding: .65rem .75rem; text-align: left; cursor: pointer; font: inherit;
}
.cabinet-sidebar button.active { background: var(--text); color: var(--bg); }
.user-mini { padding-top: var(--space-2); border-top: 2px solid var(--border); }
.user-mini p { margin-bottom: var(--space-1); }

.cabinet-main { border: 2px solid var(--border); padding: var(--space-3); }
.cabinet-main h2 { margin-bottom: var(--space-3); }
.cabinet-main > p { margin-bottom: var(--space-2); }
.cabinet-main select { margin-bottom: var(--space-3); }
.cabinet-main ul { margin: 0 0 var(--space-3); padding-left: 1.2rem; display: grid; gap: var(--space-1); }

.vpn-status {
  font-size: 1.05rem; border: 2px solid var(--border);
  padding: var(--space-3); margin-bottom: var(--space-3);
}
.vpn-status.active { animation: pulse 1.4s infinite; }
.danger { border-color: #111 !important; }

@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.02); } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

@media (max-width: 1024px) {
  .burger { display: block; }
  nav {
    position: fixed; top: 64px; right: -100%;
    flex-direction: column; align-items: stretch;
    background: var(--bg); border: 2px solid var(--border);
    padding: var(--space-3); transition: .3s; gap: var(--space-2);
    z-index: 15; min-width: 12rem;
  }
  nav.open { right: var(--content-pad-x); }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .checkout { grid-template-columns: 1fr; }
  .cabinet-page { grid-template-columns: 1fr; }
  .order-summary { position: static; }
}

@media (max-width: 768px) {
  .site-shell main > section { margin-block: var(--space-4); }
  .hero { padding: var(--space-4) 0; }
}
@media (max-width: 480px) {
  .site-header { padding-inline: var(--content-pad-x); }
}