.tab-shell {
  max-width: 100%;
}

.tab-list {
  max-width: 100%;
  padding: 5px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.tab-button {
  min-height: 40px;
  padding: 9px 15px;
  flex: 0 0 auto;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-xs);
  background: transparent;
  color: var(--color-muted);
  font-size: 13px;
  cursor: pointer;
}

.tab-button:hover {
  color: var(--color-text);
}

.tab-button.is-active,
.tab-button[aria-selected="true"] {
  border-color: var(--color-border-bright);
  background: var(--color-panel-raised);
  color: var(--color-accent);
}

.tab-panel {
  margin-top: 24px;
}

.toc-tabs {
  position: sticky;
  z-index: 18;
  top: var(--toc-top);
  width: 100%;
  max-width: 100%;
  padding: 7px;
  display: flex;
  align-items: center;
  gap: 5px;
  overflow-x: auto;
  border: var(--border-thin) solid var(--color-border-bright);
  border-radius: var(--radius-sm);
  background: var(--color-panel-raised);
  box-shadow: 0 12px 30px var(--color-shadow-soft);
  scrollbar-width: thin;
  overscroll-behavior-inline: contain;
  -webkit-overflow-scrolling: touch;
}

.toc-tabs a {
  min-height: 38px;
  padding: 8px 13px;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-xs);
  color: var(--color-muted);
  font-size: 12px;
  white-space: nowrap;
}

.toc-tabs a:hover {
  color: var(--color-text);
}

.toc-tabs a.is-current,
.toc-tabs a[aria-current="true"] {
  border-color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.toc-sticky-host {
  position: sticky;
  z-index: 18;
  top: var(--toc-host-top);
}

.toc-sticky-host > .toc-tabs,
.toc-sticky-host .toc-tabs {
  position: relative;
  top: auto;
}

body:has(.toc-tabs) section[id] {
  scroll-margin-top: calc(var(--toc-top) + 74px);
}

.faq-list {
  border-top: var(--border-thin) solid var(--color-border);
}

.faq-item {
  border-bottom: var(--border-thin) solid var(--color-border);
}

.faq-item summary {
  position: relative;
  min-height: 64px;
  padding: 19px 48px 19px 0;
  display: flex;
  align-items: center;
  color: var(--color-text);
  font-weight: 590;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 10px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 19px;
  transform: translateY(-50%);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item:not([open]) .faq-answer {
  display: none;
}

.faq-answer {
  max-width: 880px;
  padding: 0 48px 22px 0;
  color: var(--color-muted);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 18px;
}

.plan-card {
  position: relative;
  min-width: 0;
  padding: 28px;
  display: flex;
  flex-direction: column;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-md);
  background:
    linear-gradient(145deg, var(--color-accent-faint), transparent 40%),
    var(--color-panel);
}

.plan-card.is-current,
.plan-card.is-featured {
  border-color: var(--color-accent-dark);
  background:
    linear-gradient(145deg, var(--color-accent-soft), transparent 52%),
    var(--color-panel-raised);
  box-shadow: var(--shadow-panel);
}

.plan-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  max-width: calc(100% - 32px);
}

.plan-period {
  margin: 0 0 18px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.plan-card.is-featured .plan-period {
  margin-top: 28px;
}

.plan-name {
  margin: 0 0 10px;
  font-size: 24px;
}

.plan-price {
  margin: 0 0 4px;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 50px);
  font-weight: 620;
  line-height: 1;
}

.plan-price small {
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 500;
}

.plan-note {
  min-height: 48px;
  margin: 10px 0 20px;
  color: var(--color-muted);
  font-size: 13px;
}

.plan-features {
  margin: 0 0 26px;
  padding: 20px 0 0;
  display: grid;
  gap: 10px;
  border-top: var(--border-thin) dashed var(--color-border);
  list-style: none;
  color: var(--color-warn);
  font-size: 13px;
}

.plan-features li {
  position: relative;
  padding-left: 17px;
}

.plan-features li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
}

.plan-card .button {
  width: 100%;
  margin-top: auto;
}

.table-scroll {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  -webkit-overflow-scrolling: touch;
}

.data-table,
.route-table,
.comparison-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  color: var(--color-muted);
  font-size: 13px;
}

.data-table th,
.data-table td,
.route-table th,
.route-table td,
.comparison-table th,
.comparison-table td {
  padding: 15px 17px;
  border-bottom: var(--border-thin) solid var(--color-border);
  text-align: left;
  vertical-align: middle;
}

.data-table th,
.route-table th,
.comparison-table th {
  background: var(--color-panel-raised);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.data-table th:first-child,
.data-table td:first-child,
.route-table th:first-child,
.route-table td:first-child,
.comparison-table th:first-child,
.comparison-table td:first-child {
  color: var(--color-text);
  font-weight: 580;
}

.data-table tr:last-child td,
.route-table tr:last-child td,
.comparison-table tr:last-child td {
  border-bottom: 0;
}

.route-group td {
  background: var(--color-accent-faint);
  color: var(--color-accent) !important;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.route-type {
  display: inline-flex;
  padding: 4px 7px;
  border: var(--border-thin) solid var(--color-border-bright);
  border-radius: var(--radius-xs);
  color: var(--color-warn);
  font-family: var(--font-mono);
  font-size: 9px;
}

.support-mark {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.platform-card {
  min-width: 0;
  padding: 22px 16px;
  display: flex;
  align-items: center;
  flex-direction: column;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  text-align: center;
  transition:
    border-color var(--transition-fast),
    transform var(--transition-fast);
}

.platform-card:hover {
  border-color: var(--color-accent-dark);
  transform: translateY(-3px);
}

.platform-icon {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  margin-bottom: 15px;
  display: grid;
  place-items: center;
  border: var(--border-thin) solid var(--color-accent-dark);
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.platform-icon svg {
  width: 23px;
  height: 23px;
  stroke: currentColor;
}

.platform-name {
  margin: 0 0 14px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 610;
}

.platform-card .button {
  width: 100%;
  min-height: 40px;
  padding-inline: 10px;
  font-size: 12px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  min-width: 0;
  padding: 24px;
  display: flex;
  flex-direction: column;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast);
}

.article-card:hover {
  border-color: var(--color-border-bright);
  background: var(--color-panel-raised);
  transform: translateY(-3px);
}

.article-meta {
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  color: var(--color-subtle);
  font-family: var(--font-mono);
  font-size: 10px;
}

.article-card h3 {
  margin-bottom: 12px;
  font-size: 21px;
  line-height: 1.35;
}

.article-card p {
  margin-bottom: 20px;
  color: var(--color-muted);
  font-size: 14px;
}

.article-card-link {
  margin-top: auto;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

.callout {
  position: relative;
  margin-block: 26px;
  padding: 20px 22px 20px 26px;
  border: var(--border-thin) solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: linear-gradient(90deg, var(--color-accent-soft), var(--color-panel));
  color: var(--color-warn);
}

.callout strong {
  color: var(--color-text);
}

.promo-block {
  position: relative;
  overflow-x: clip;
  margin-top: 56px;
  padding: clamp(26px, 5vw, 46px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  border: var(--border-thin) solid var(--color-accent-dark);
  border-radius: var(--radius-md);
  background:
    linear-gradient(110deg, var(--color-accent-soft), transparent 58%),
    var(--color-panel-raised);
  box-shadow: var(--shadow-panel);
}

.promo-brand {
  margin: 0 0 6px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.promo-block h2,
.promo-block h3 {
  margin-bottom: 8px;
  font-size: clamp(25px, 3vw, 38px);
}

.promo-block p {
  max-width: 650px;
  margin: 0;
  color: var(--color-muted);
}

.float-cta {
  position: fixed;
  z-index: 40;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  min-height: 48px;
  padding: 9px 16px 9px 10px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: var(--border-thin) solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: 13px;
  font-weight: 680;
  box-shadow: var(--shadow-accent), var(--shadow-panel);
}

.float-cta-icon {
  width: 29px;
  height: 29px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-bg);
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.stat-grid {
  margin-block: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stat-card {
  padding: 18px;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.stat-num {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 22px;
}

.stat-label {
  margin-top: 5px;
  color: var(--color-muted);
  font-size: 12px;
}

.check-list {
  padding: 0;
  display: grid;
  gap: 8px;
  list-style: none;
}

.verdict {
  margin-block: 24px;
  padding: 18px 20px;
  border-left: 3px solid var(--color-accent);
  background: var(--color-panel-raised);
  color: var(--color-muted);
}

.verdict strong {
  color: var(--color-text);
}

.preview-swatch-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.preview-swatch {
  min-height: 118px;
  padding: 14px;
  display: flex;
  align-items: flex-end;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 10px;
}

.swatch-bg {
  background: var(--color-bg);
}

.swatch-panel {
  background: var(--color-panel);
}

.swatch-raised {
  background: var(--color-panel-raised);
}

.swatch-border {
  background: var(--color-border);
}

.swatch-accent {
  background: var(--color-accent);
  color: var(--color-bg);
}

.swatch-accent-dark {
  background: var(--color-accent-dark);
}

.swatch-text {
  background: var(--color-text);
  color: var(--color-bg);
}

.swatch-muted {
  background: var(--color-muted);
  color: var(--color-bg);
}

.swatch-warn {
  background: var(--color-warn);
  color: var(--color-bg);
}

.preview-type-row {
  padding-block: 24px;
  border-bottom: var(--border-thin) solid var(--color-border);
}

.preview-type-label {
  margin-bottom: 10px;
  color: var(--color-subtle);
  font-family: var(--font-mono);
  font-size: 10px;
}

.preview-button-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.hero {
  position: relative;
  min-height: var(--hero-min-height);
  overflow-x: clip;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: calc(50% + 70px);
  width: var(--border-thin);
  background: linear-gradient(
    transparent,
    var(--color-border) 16%,
    var(--color-border) 84%,
    transparent
  );
}

.hero::after {
  content: "";
  position: absolute;
  z-index: -2;
  right: 6%;
  bottom: -36%;
  width: 640px;
  height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-soft), transparent 68%);
  filter: blur(10px);
}

.hero-inner {
  width: 100%;
  max-width: calc(var(--page-width) + (var(--gutter) * 2));
  min-height: var(--hero-min-height);
  margin-inline: auto;
  padding: 46px var(--gutter) 40px;
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(570px, 1.06fr);
  align-items: center;
  gap: 66px;
}

.hero-copy {
  position: relative;
  z-index: 5;
  max-width: 650px;
  padding-left: 8px;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 11px;
}

.hero-description {
  max-width: 600px;
  margin: 25px 0 0;
  color: var(--color-muted);
  font-size: var(--body-size);
  line-height: 1.75;
}

.hero-description strong {
  color: var(--color-text);
  font-weight: 610;
}

.trust-line {
  margin: 19px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 17px;
  list-style: none;
  color: var(--color-warn);
  font-size: 12px;
}

.trust-line li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.trust-line li::before {
  content: "";
  width: 5px;
  height: 5px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 9px var(--color-accent-glow);
}

.route-receipts {
  margin-top: 26px;
  padding-top: 17px;
  border-top: var(--border-thin) solid var(--color-border);
}

.route-heading {
  margin-bottom: 11px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--color-subtle);
  font-family: var(--font-mono);
  font-size: var(--micro-size);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.route-heading span:last-child {
  color: var(--color-accent-dark);
}

.route-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 7px;
}

.route-card {
  min-width: 0;
  padding: 8px 7px;
  display: flex;
  align-items: center;
  gap: 7px;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.flag {
  width: 25px;
  height: 17px;
  flex: 0 0 auto;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-border-bright);
  border-radius: 3px;
  background: var(--color-flag-white);
}

.flag .flag-red {
  fill: var(--color-flag-red);
}

.flag .flag-blue {
  fill: var(--color-flag-blue);
}

.flag .flag-navy {
  fill: var(--color-flag-navy);
}

.flag .flag-white {
  fill: var(--color-flag-white);
}

.flag .flag-black {
  fill: var(--color-flag-black);
}

.flag .flag-stroke {
  stroke: var(--color-flag-black);
}

.route-name {
  min-width: 0;
  color: var(--color-text);
  font-size: 11px;
  font-weight: 570;
  white-space: nowrap;
}

.route-ack {
  margin-left: auto;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.04em;
}

.protocol-stage {
  position: relative;
  min-height: 620px;
  display: grid;
  place-items: center;
  isolation: isolate;
}

.light-noise {
  position: absolute;
  z-index: -3;
  inset: 4% 0 2% 2%;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-md);
  background:
    linear-gradient(90deg, transparent 49.8%, var(--color-grid) 50%, transparent 50.2%),
    linear-gradient(var(--color-grid) var(--border-thin), transparent var(--border-thin)),
    var(--color-panel);
  background-size: 92px 100%, 100% 48px, auto;
}

.light-noise::after {
  content: "ROUTE / ACK / ROUTE / ACK";
  position: absolute;
  right: -150px;
  bottom: 150px;
  color: var(--color-accent-faint);
  font-family: var(--font-mono);
  font-size: 50px;
  font-weight: 700;
  letter-spacing: 0.05em;
  transform: rotate(-90deg);
  white-space: nowrap;
}

.beam {
  position: absolute;
  bottom: 0;
  border-radius: var(--radius-xs) var(--radius-xs) 0 0;
  background: linear-gradient(
    to top,
    transparent,
    var(--color-accent-faint) 18%,
    var(--color-accent-soft) 62%,
    transparent
  );
  opacity: 0.82;
}

.beam-one {
  left: 8%;
  width: 21px;
  height: 62%;
}

.beam-two {
  left: 15%;
  width: 7px;
  height: 39%;
}

.beam-three {
  left: 22%;
  width: 42px;
  height: 78%;
}

.beam-four {
  left: 34%;
  width: 10px;
  height: 51%;
}

.beam-five {
  right: 24%;
  width: 28px;
  height: 88%;
}

.beam-six {
  right: 14%;
  width: 8px;
  height: 58%;
}

.beam-seven {
  right: 6%;
  width: 46px;
  height: 72%;
}

.protocol-window {
  position: relative;
  z-index: 3;
  width: min(90%, 608px);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-border-bright);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-window), 0 0 0 var(--border-thin) var(--color-accent-faint);
}

.protocol-window::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(125deg, var(--color-accent-faint), transparent 30%);
}

.window-chrome {
  position: relative;
  height: 53px;
  padding: 0 17px;
  display: flex;
  align-items: center;
  border-bottom: var(--border-thin) solid var(--color-border);
  background: var(--color-panel-raised);
}

.chrome-dots {
  display: flex;
  gap: 7px;
}

.chrome-dot {
  width: 7px;
  height: 7px;
  border: var(--border-thin) solid var(--color-border-bright);
  border-radius: 50%;
  background: var(--color-panel-soft);
}

.chrome-dot.is-ready {
  border-color: var(--color-accent-dark);
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent-glow);
}

.window-title {
  position: absolute;
  left: 50%;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--micro-size);
  letter-spacing: 0.04em;
  transform: translateX(-50%);
  white-space: nowrap;
}

.window-mode {
  margin-left: auto;
  padding: 5px 7px;
  border: var(--border-thin) solid var(--color-border);
  border-radius: var(--radius-xs);
  color: var(--color-subtle);
  font-family: var(--font-mono);
  font-size: 9px;
}

.protocol-body {
  position: relative;
  padding: 24px 25px 25px;
}

.session-meta {
  margin-bottom: 23px;
  padding-bottom: 17px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  border-bottom: var(--border-thin) dashed var(--color-border);
}

.session-kicker {
  margin: 0 0 6px;
  color: var(--color-subtle);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.session-route {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
}

.session-route span {
  color: var(--color-accent);
}

.session-status {
  padding: 7px 9px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: var(--border-thin) solid var(--color-accent-dark);
  border-radius: var(--radius-xs);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 9px;
  white-space: nowrap;
}

.session-status::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent);
}

.handshake {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.handshake::before {
  content: "";
  position: absolute;
  top: 13px;
  bottom: 16px;
  left: 10px;
  border-left: var(--border-thin) dashed var(--color-border-bright);
}

.handshake-row {
  position: relative;
  min-height: 58px;
  padding: 3px 0 12px 36px;
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.45;
}

.handshake-row::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 5px;
  width: 9px;
  height: 9px;
  border: var(--border-thin) solid var(--color-accent-dark);
  border-radius: 50%;
  background: var(--color-panel);
  box-shadow: 0 0 0 4px var(--color-panel);
}

.handshake-row::after {
  content: "";
  position: absolute;
  top: 12px;
  left: 15px;
  width: 13px;
  border-top: var(--border-thin) solid var(--color-border);
}

.step-command {
  color: var(--color-text);
}

.step-result {
  color: var(--color-muted);
}

.step-mark {
  color: var(--color-accent-dark);
  font-size: 9px;
  letter-spacing: 0.05em;
}

.ack-result {
  position: relative;
  margin-top: 4px;
  padding: 18px 19px;
  display: flex;
  align-items: center;
  gap: 13px;
  border: var(--border-thin) solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, var(--color-accent-soft), transparent);
  box-shadow: inset 0 0 32px var(--color-accent-faint), var(--shadow-accent);
}

.ack-light {
  width: 11px;
  height: 11px;
  flex: 0 0 auto;
  border: 2px solid var(--color-panel);
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 var(--border-thin) var(--color-accent), 0 0 18px var(--color-accent);
}

.ack-copy {
  min-width: 0;
}

.ack-main {
  margin: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 670;
  letter-spacing: -0.02em;
}

.ack-note {
  margin: 5px 0 0;
  color: var(--color-warn);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.ack-seal {
  margin-left: auto;
  padding-left: 15px;
  border-left: var(--border-thin) solid var(--color-accent-dark);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
}

@media (max-width: 1120px) {
  .hero-inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(500px, 1.1fr);
    gap: 38px;
  }

  .route-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .platform-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .hero {
    min-height: auto;
  }

  .hero::before {
    display: none;
  }

  .hero-inner {
    min-height: auto;
    padding-top: 70px;
    padding-bottom: 70px;
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-copy {
    max-width: 720px;
    padding-left: 0;
  }

  .protocol-stage {
    min-height: 580px;
  }

  .pricing-grid,
  .article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .preview-swatch-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .pricing-grid,
  .article-grid,
  .platform-grid,
  .stat-grid,
  .preview-swatch-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-inner {
    padding-top: 46px;
    padding-bottom: 56px;
  }

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

  .hero-actions .cta {
    width: 100%;
  }

  .route-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .route-card:last-child {
    grid-column: 1 / -1;
  }

  .route-name {
    white-space: normal;
  }

  .protocol-stage {
    min-height: 510px;
  }

  .light-noise {
    inset-inline: 0;
  }

  .light-noise::after {
    display: none;
  }

  .protocol-window {
    width: 100%;
  }

  .protocol-body {
    padding: 20px 16px;
  }

  .window-title {
    display: none;
  }

  .session-meta {
    flex-direction: column;
  }

  .handshake-row {
    min-height: 66px;
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .step-command {
    grid-column: 1 / -1;
  }

  .ack-result {
    align-items: flex-start;
  }

  .ack-main {
    font-size: 15px;
  }

  .ack-seal {
    display: none;
  }

  .plan-card {
    padding: 22px;
  }

  .promo-block {
    grid-template-columns: minmax(0, 1fr);
  }

  .promo-block .button {
    width: 100%;
  }

  .float-cta {
    right: max(12px, env(safe-area-inset-right));
    bottom: max(12px, env(safe-area-inset-bottom));
  }

  .toc-tabs {
    border-radius: var(--radius-xs);
  }
}