:root {
  --component-purple: #544CC9;
  --component-purple-light: #D5D3F3;
  --component-green: #2FA98C;
  --component-green-light: #CBECE4;
  --component-orange: #F08A3C;
  --component-orange-light: #FAD5B8;
  --component-white: #FFFFFF;
  --component-dark: #2A2B33;
  --component-gray: #6B6D78;
  --component-line: #DFE0E4;
}

.chip-row,
.badge-row,
.platform-chips {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.chip,
.fact-chip,
.platform-chip {
  display: inline-flex;
  min-height: 36px;
  max-width: 100%;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.35;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.chip svg,
.fact-chip svg,
.platform-chip svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-ink-muted);
}

a.platform-chip:hover,
a.chip:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-deep);
}

a.platform-chip:hover svg,
a.chip:hover svg {
  color: var(--color-brand);
}

.badge {
  display: inline-flex;
  min-height: 26px;
  max-width: 100%;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 750;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.badge--primary,
.badge--recommended {
  background: var(--color-brand);
  color: var(--color-surface);
}

.badge--success,
.badge--preferred {
  background: var(--color-success-deep);
  color: var(--color-surface);
}

.badge--warning {
  background: var(--color-warning-deep);
  color: var(--color-surface);
}

.badge--retired {
  border-color: var(--color-line);
  background: var(--color-surface-muted);
  color: var(--color-ink);
}

.badge--outline {
  border-color: var(--color-brand);
  background: var(--color-surface);
  color: var(--color-brand-deep);
}

.tab-shell {
  border-radius: var(--radius-lg);
}

.tab-list {
  display: flex;
  max-width: 100%;
  gap: 8px;
  padding: 6px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface-muted);
  color: var(--color-ink);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.tab-list [role="tab"] {
  min-height: 44px;
  flex: 1 0 auto;
  padding: 9px 18px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-muted);
  cursor: pointer;
  font-weight: 700;
  white-space: nowrap;
}

.tab-list [role="tab"]:hover {
  color: var(--color-ink);
}

.tab-list [role="tab"][aria-selected="true"],
.tab-list [role="tab"].is-active {
  background: var(--color-brand);
  color: var(--color-surface);
}

.tab-panel {
  padding-top: var(--space-5);
}

.tab-panel[hidden] {
  display: none;
}

.toc {
  display: flex;
  max-width: 100%;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px;
  overflow-x: visible;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.toc a {
  display: inline-flex;
  min-height: 42px;
  max-width: 100%;
  flex: 0 1 auto;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
  white-space: normal;
}

.toc a:hover,
.toc a[aria-current="true"] {
  background: var(--color-brand-wash);
  color: var(--color-brand-deep);
}

.faq-list {
  border-top: 1px solid var(--color-line);
}

.faq-item {
  border-bottom: 1px solid var(--color-line);
}

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 18px 44px 18px 0;
  color: var(--color-ink);
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

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

.faq-item summary::after {
  position: absolute;
  right: 4px;
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-brand-wash);
  color: var(--color-brand-deep);
  content: "+";
  font-size: 20px;
  font-weight: 500;
  line-height: 25px;
  text-align: center;
}

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

.faq-answer {
  max-width: 820px;
  padding: 0 44px 22px 0;
  color: var(--color-ink-muted);
}

.glossary-card {
  position: relative;
  padding: 26px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
}

.glossary-card::before {
  display: block;
  width: 38px;
  height: 5px;
  margin-bottom: 18px;
  border-radius: var(--radius-pill);
  background: var(--color-success);
  content: "";
}

.glossary-card dt {
  margin-bottom: 8px;
  color: var(--color-brand-deep);
  font-size: 20px;
  font-weight: 750;
}

.glossary-card dd {
  margin: 0;
  color: var(--color-ink-muted);
}

.download-card {
  display: flex;
  height: 100%;
  flex-direction: column;
  gap: var(--space-5);
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
}

.download-card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.download-card__identity {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.download-card__identity img {
  width: 54px;
  height: 54px;
  flex-shrink: 0;
}

.download-card__title {
  margin: 0;
  font-size: 23px;
  font-weight: 650;
}

.download-card__meta {
  color: var(--color-ink-muted);
  font-size: 14px;
}

.download-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: auto;
}

.article-card {
  display: flex;
  height: 100%;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
  text-decoration: none;
  transition: transform var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-brand-soft);
  color: var(--color-ink);
}

.article-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-bottom: var(--space-3);
  color: var(--color-ink-muted);
  font-size: 13px;
}

.article-card__title {
  margin-bottom: var(--space-3);
  font-size: 21px;
  font-weight: 650;
}

.article-card__summary {
  margin-bottom: var(--space-5);
  color: var(--color-ink-muted);
}

.article-card__more {
  margin-top: auto;
  color: var(--color-brand-deep);
  font-weight: 700;
}

.callout {
  position: relative;
  margin-block: var(--space-5);
  padding: 22px 24px 22px 54px;
  border: 1px solid var(--color-brand-soft);
  border-radius: var(--radius-md);
  background: var(--color-brand-wash);
  color: var(--color-ink);
}

.callout::before {
  position: absolute;
  top: 24px;
  left: 22px;
  width: 12px;
  height: 12px;
  border: 3px solid var(--color-brand);
  border-radius: var(--radius-pill);
  content: "";
}

.callout--success {
  border-color: var(--color-success);
  background: var(--color-success-light);
  color: var(--color-ink);
}

.callout--success::before {
  border-color: var(--color-success-deep);
}

.callout--warning {
  border-color: var(--color-warning);
  background: var(--color-orange-light);
  color: var(--color-ink);
}

.callout--warning::before {
  border-color: var(--color-warning-deep);
}

.callout__title {
  margin-bottom: 5px;
  font-weight: 750;
}

.callout > :last-child {
  margin-bottom: 0;
}

.end-download-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-5);
  margin-top: var(--space-8);
  padding: clamp(24px, 4vw, 42px);
  border-radius: var(--radius-lg);
  background: var(--color-brand-wash);
  color: var(--color-ink);
}

.end-download-card h2,
.end-download-card h3 {
  margin-bottom: 8px;
  color: var(--color-brand-deep);
}

.end-download-card p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
}

.dl-fab {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 100;
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  background: var(--color-brand);
  box-shadow: 0 6px 18px var(--color-fab-shadow);
  color: var(--color-surface);
  font-size: 14.5px;
  font-weight: 700;
  text-decoration: none;
  transition: transform var(--duration-fast) ease, background-color var(--duration-fast) ease;
}

.dl-fab:hover {
  transform: translateY(-1px);
  background: var(--color-brand-deep);
  color: var(--color-surface);
}

.dl-fab svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.feature-blocks {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-5);
}

.feature-block {
  min-height: 480px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  color: var(--color-ink);
}

.feature-block__visual {
  min-height: 270px;
  padding: var(--space-6);
}

.feature-block__copy {
  min-height: 190px;
  padding: var(--space-6);
  color: var(--color-ink);
}

.feature-block--purple .feature-block__visual {
  background: var(--component-purple);
  color: var(--component-white);
}

.feature-block--purple .feature-block__copy {
  background: var(--component-purple-light);
  color: var(--component-dark);
}

.feature-block--green .feature-block__visual {
  background: var(--component-green);
  color: var(--component-white);
}

.feature-block--green .feature-block__copy {
  background: var(--component-green-light);
  color: var(--component-dark);
}

.feature-platform-strip {
  grid-column: 1 / -1;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--component-orange);
  color: var(--component-dark);
}

.feature-platform-strip__links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
}

.feature-platform-strip a {
  display: flex;
  min-height: 96px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px;
  border-radius: var(--radius-md);
  background: var(--component-white);
  color: var(--component-dark);
  font-weight: 700;
  text-decoration: none;
}

.feature-platform-strip svg {
  width: 24px;
  height: 24px;
}

.preview-hero {
  position: relative;
  min-height: 690px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-sky-top), var(--color-sky-bottom) 55%, var(--color-canvas));
  color: var(--color-ink);
}

.preview-hero__copy {
  position: relative;
  z-index: 12;
  max-width: 840px;
  margin-inline: auto;
  padding: 42px var(--gutter) 330px;
  text-align: center;
}

.preview-hero__copy h1 {
  margin-bottom: 14px;
  color: var(--color-brand-deep);
  font-size: clamp(34px, 4vw, 48px);
}

.preview-hero__copy .lede {
  max-width: 650px;
  margin-inline: auto;
  color: var(--color-ink-muted);
  font-size: 16.5px;
}

.preview-hero__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: var(--space-5);
}

.preview-hero__chips {
  justify-content: center;
  margin-top: var(--space-5);
}

.route-flags {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 14px;
}

.route-flags__label,
.route-flag span {
  color: var(--color-ink-muted);
  font-size: 12.5px;
}

.route-flag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.route-flag svg {
  width: 24px;
  height: 16px;
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  background: var(--color-surface);
}

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

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

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

.hero-clouds {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  animation: cloud-drift 90s ease-in-out infinite alternate;
}

.hero-cloud {
  position: absolute;
  color: var(--color-surface);
}

.hero-cloud--one {
  top: 110px;
  left: 9%;
  width: 180px;
}

.hero-cloud--two {
  top: 205px;
  right: 12%;
  width: 130px;
}

.hero-cloud--three {
  top: 76px;
  right: 34%;
  width: 96px;
}

@keyframes cloud-drift {
  to {
    transform: translateX(56px);
  }
}

.hero-landscape {
  position: absolute;
  bottom: 0;
  left: 50%;
  z-index: 5;
  width: 1920px;
  height: 390px;
  transform: translateX(-50%);
  transform-origin: 50% 100%;
}

.hero-landscape svg {
  width: 100%;
  height: 100%;
}

.hero-hill-pale {
  fill: var(--color-hill-pale);
}

.hero-hill-light {
  fill: var(--color-hill-light);
}

.hero-hill-mid {
  fill: var(--color-hill-mid);
}

.hero-hill-main {
  fill: var(--color-hill-main);
}

.hero-hill-deep {
  fill: var(--color-hill-deep);
}

.hero-wave {
  fill: var(--color-surface);
}

.hero-route {
  fill: none;
  stroke: var(--color-brand);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-device {
  fill: var(--color-surface);
  stroke: var(--color-line);
  stroke-width: 2;
}

.hero-device-screen {
  fill: var(--color-brand-wash);
}

.hero-device-bar {
  fill: var(--color-brand);
}

.hero-node {
  stroke: var(--color-surface);
  stroke-width: 3;
}

.hero-node--purple {
  fill: var(--color-brand);
}

.hero-node--green {
  fill: var(--color-success);
}

.hero-node--orange {
  fill: var(--color-warning);
}

.hero-platform-tile {
  color: var(--color-ink);
  text-decoration: none;
}

.hero-platform-tile rect {
  fill: var(--color-surface);
  stroke: var(--color-line);
}

.hero-platform-tile text {
  fill: var(--color-ink-muted);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 650;
  text-anchor: middle;
}

.hero-platform-tile .platform-symbol {
  fill: currentColor;
}

.token-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.token-swatch {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
}

.token-swatch__color {
  min-height: 96px;
}

.token-swatch__label {
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.swatch-canvas { background: var(--color-canvas); }
.swatch-surface { background: var(--color-surface); }
.swatch-muted { background: var(--color-surface-muted); }
.swatch-line { background: var(--color-line); }
.swatch-brand { background: var(--color-brand); }
.swatch-brand-deep { background: var(--color-brand-deep); }
.swatch-ink { background: var(--color-ink); }
.swatch-ink-muted { background: var(--color-ink-muted); }
.swatch-success { background: var(--color-success); }
.swatch-warning { background: var(--color-warning); }
.swatch-error { background: var(--color-error); }
.swatch-sky { background: var(--color-sky-top); }

.preview-block {
  padding: var(--space-7);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
}

@media (max-width: 1080px) {
  .hero-landscape {
    transform: translateX(-50%) scale(0.78);
  }

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

@media (max-width: 760px) {
  .feature-blocks {
    grid-template-columns: 1fr;
  }

  .feature-platform-strip {
    grid-column: auto;
  }

  .feature-platform-strip__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .preview-hero {
    min-height: 720px;
  }

  .preview-hero__copy {
    padding-top: 32px;
    padding-bottom: 300px;
  }

  .hero-landscape {
    transform: translateX(-50%) scale(0.55);
  }

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

  .end-download-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .dl-fab {
    right: 16px;
    bottom: 16px;
    max-width: calc(100vw - 32px);
    padding-inline: 17px;
    white-space: normal;
  }

  .preview-block {
    padding: 22px;
  }

  .preview-hero__actions .button {
    width: auto;
  }

  .tab-list [role="tab"] {
    padding-inline: 14px;
  }
}

@media (max-width: 420px) {
  .feature-platform-strip__links,
  .token-grid {
    grid-template-columns: 1fr;
  }

  .preview-hero__actions .button {
    width: 100%;
  }

  .route-flags {
    gap: 8px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-clouds {
    animation: none;
  }
}