.hero-preview {
  position: relative;
  padding-top: 56px;
  padding-bottom: 72px;
  overflow-x: clip;
}

.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(880px 560px at 12% 0%, var(--color-mint-glow), transparent 62%),
    radial-gradient(760px 520px at 46% 30%, var(--color-sky-glow), transparent 60%);
  opacity: 0.75;
  pointer-events: none;
}

.hero-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  align-items: center;
  gap: clamp(38px, 5vw, 64px);
}

.hero-copy {
  padding-bottom: 8px;
}

.hero-copy .chip-row {
  margin-bottom: 22px;
}

.hero-lead {
  max-width: 35em;
  margin-bottom: 29px;
  color: var(--color-ink-muted);
  font-size: 17px;
  line-height: 1.75;
}

.hero-lead strong {
  color: var(--color-ink);
  font-weight: 650;
}

.hero-copy .button-row {
  margin-bottom: 25px;
}

.platform-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
}

.platform-caption {
  margin-right: 3px;
  color: var(--color-ink-muted);
  font-size: 13px;
}

.platform-link,
.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.platform-link:hover {
  border-color: var(--color-accent-line);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

.platform-link svg,
.platform-badge svg {
  width: 15px;
  height: 15px;
  color: var(--color-ink-muted);
  flex-shrink: 0;
}

.device-zone {
  position: relative;
  padding: 36px 8px 44px 4px;
}

.mock-window {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-window);
  overflow: hidden;
  transform: rotate(-1.5deg);
}

.mock-titlebar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink);
}

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

.window-dots i {
  width: 11px;
  height: 11px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}

.dot-error {
  background: var(--color-error);
}

.dot-warning {
  background: var(--color-warning);
}

.dot-success {
  background: var(--color-success);
}

.window-title {
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 13px;
}

.window-connection {
  display: inline-flex;
  margin-left: auto;
  align-items: center;
  gap: 7px;
  color: var(--color-success);
  font-size: 12px;
  font-weight: 700;
}

.window-connection::before {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-success);
  content: "";
  flex-shrink: 0;
}

.mock-body {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
}

.mock-side {
  display: flex;
  padding: 18px 14px 20px;
  border-right: 1px solid var(--color-border);
  background: var(--color-canvas);
  color: var(--color-ink);
  flex-direction: column;
  gap: 4px;
}

.mock-side-label {
  padding: 0 10px 8px;
  color: var(--color-ink-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.mock-side-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-ink-muted);
  font-size: 13px;
}

.mock-side-item::before {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background: var(--color-border);
  content: "";
  flex-shrink: 0;
}

.mock-side-item.is-current {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-weight: 700;
}

.mock-side-item.is-current::before {
  background: var(--color-accent);
}

.mock-side-foot {
  margin-top: auto;
  padding: 12px 10px 0;
  border-top: 1px dashed var(--color-border);
  color: var(--color-ink-muted);
  font-size: 12px;
}

.mock-main {
  display: flex;
  padding: 20px 24px 22px;
  flex-direction: column;
}

.setting-block {
  padding: 4px 0 16px;
}

.setting-block + .setting-block {
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.setting-title {
  margin-bottom: 10px;
  color: var(--color-ink-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.radio-line {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  color: var(--color-ink);
  font-size: 14px;
}

.radio-line.is-muted {
  color: var(--color-ink-muted);
}

.radio-mark {
  display: inline-flex;
  width: 17px;
  height: 17px;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  flex-shrink: 0;
}

.radio-mark.is-checked {
  border-color: var(--color-accent);
}

.radio-mark.is-checked::after {
  width: 9px;
  height: 9px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.setting-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 7px 0;
  color: var(--color-ink);
  font-size: 14px;
}

.setting-label {
  font-weight: 600;
}

.setting-hint {
  margin-top: 1px;
  color: var(--color-ink-muted);
  font-size: 12px;
}

.setting-control {
  display: inline-flex;
  margin-left: auto;
  align-items: center;
  gap: 8px;
}

.switch-on {
  position: relative;
  width: 40px;
  height: 22px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  flex-shrink: 0;
}

.switch-on::after {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  box-shadow: 0 1px 3px var(--color-shadow-mid);
  content: "";
}

.mock-field {
  padding: 5px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 13px;
}

.field-unit {
  color: var(--color-ink-muted);
  font-size: 13px;
}

.setting-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-success);
  font-size: 13px;
  font-weight: 700;
}

.setting-status::before {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-success);
  content: "";
  flex-shrink: 0;
}

.update-card {
  position: absolute;
  top: 0;
  right: -6px;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px 14px 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  transform: rotate(2.5deg);
  animation: update-card-float 6s ease-in-out infinite;
}

.update-icon {
  display: flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  flex-shrink: 0;
}

.update-icon svg {
  width: 17px;
  height: 17px;
}

.update-title {
  font-size: 14px;
  font-weight: 750;
  line-height: 1.3;
}

.update-subtitle {
  color: var(--color-ink-muted);
  font-size: 12px;
  line-height: 1.4;
}

@keyframes update-card-float {
  0%,
  100% {
    transform: rotate(2.5deg) translateY(0);
  }

  50% {
    transform: rotate(2.5deg) translateY(-7px);
  }
}

.tabs {
  max-width: 100%;
}

.tab-list {
  display: flex;
  max-width: 100%;
  gap: 7px;
  margin-bottom: 24px;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface-soft);
  color: var(--color-ink);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-width: thin;
}

.tab-button {
  min-width: max-content;
  min-height: 42px;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-muted);
  font-weight: 700;
  cursor: pointer;
}

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

.tab-button[aria-selected="true"],
.tab-button.is-active {
  background: var(--color-surface);
  color: var(--color-accent-strong);
  box-shadow: 0 4px 14px var(--color-shadow-soft);
}

.tab-panel {
  color: var(--color-ink);
}

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

.toc {
  position: sticky;
  top: 16px;
  z-index: 20;
  display: flex;
  max-width: 100%;
  margin-bottom: 40px;
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: 0 8px 20px var(--color-shadow-soft);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

.toc a {
  min-width: max-content;
  padding: 8px 13px;
  border-radius: var(--radius-sm);
  color: var(--color-ink-muted);
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.toc a:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: 0 6px 18px var(--color-shadow-soft);
  overflow: clip;
}

.faq-item summary {
  position: relative;
  padding: 19px 54px 19px 21px;
  color: var(--color-ink);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 21px;
  color: var(--color-accent-strong);
  content: "+";
  font-size: 22px;
  line-height: 1;
  transform: translateY(-50%);
}

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

.faq-answer {
  padding: 0 21px 19px;
  color: var(--color-ink-muted);
}

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

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.term-card {
  padding: 23px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.term-card dt {
  margin-bottom: 7px;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 750;
}

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

.client-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: clamp(22px, 4vw, 32px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.client-logo {
  width: 54px;
  height: 54px;
  flex-shrink: 0;
}

.client-card-main {
  min-width: 0;
}

.client-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-bottom: 10px;
}

.client-card-head h3 {
  margin: 0;
}

.client-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.client-version {
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 13px;
}

.badge-featured {
  border-color: var(--color-accent-line);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

.badge-recommended {
  border-color: var(--color-accent-line);
  background: var(--color-surface);
  color: var(--color-accent-strong);
}

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

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.article-card {
  display: flex;
  min-height: 100%;
  padding: 25px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.article-card:hover {
  color: var(--color-ink);
  box-shadow: var(--shadow-window);
  transform: translateY(-3px);
}

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

.article-card h3 {
  font-size: 20px;
}

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

.article-link {
  margin-top: auto;
  color: var(--color-accent-strong);
  font-weight: 700;
}

.callout {
  position: relative;
  margin: 26px 0;
  padding: 19px 21px 19px 52px;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

.callout::before {
  position: absolute;
  top: 19px;
  left: 21px;
  display: inline-flex;
  width: 20px;
  height: 20px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-surface);
  content: "i";
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.callout-title {
  display: block;
  margin-bottom: 4px;
  color: var(--color-ink);
  font-weight: 750;
}

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

.download-note-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  margin-top: 42px;
  padding: 24px;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-lg);
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

.download-note-card h2,
.download-note-card h3 {
  margin-bottom: 5px;
}

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

.dl-fab {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 80;
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 9px;
  padding: 12px 21px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-surface);
  box-shadow: var(--shadow-fab);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 750;
  text-decoration: none;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.dl-fab:hover {
  background: var(--color-accent-strong);
  color: var(--color-surface);
  transform: translateY(-2px);
}

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

.token-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

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

.token-swatch {
  height: 82px;
  border-bottom: 1px solid var(--color-border);
}

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

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

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

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

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

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

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

.swatch-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-glow {
  background: linear-gradient(135deg, var(--color-mint-glow), var(--color-sky-glow));
}

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

.type-sample {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}

.type-sample:last-child {
  border-bottom: 0;
}

.type-name {
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.preview-footer {
  margin-top: 0;
}

@media (max-width: 1080px) {
  .hero-layout {
    grid-template-columns: 1fr;
  }

  .device-zone {
    order: 2;
  }

  .hero-copy {
    order: 1;
  }

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

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

@media (max-width: 720px) {
  .hero-preview {
    padding-top: 38px;
    padding-bottom: 52px;
  }

  .device-zone {
    padding-top: 28px;
  }

  .mock-window {
    transform: none;
  }

  .mock-body {
    grid-template-columns: 132px minmax(0, 1fr);
  }

  .mock-main {
    padding: 17px;
  }

  .mock-side {
    padding-inline: 9px;
  }

  .update-card {
    right: 0;
    transform: none;
    animation: none;
  }

  .setting-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .setting-control {
    margin-left: 0;
  }

  .glossary-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

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

  .download-note-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .dl-fab {
    right: 16px;
    bottom: 16px;
  }
}

@media (max-width: 480px) {
  .mock-body {
    grid-template-columns: 1fr;
  }

  .mock-side {
    display: none;
  }

  .mock-titlebar {
    padding-inline: 14px;
  }

  .mock-main {
    padding: 15px;
  }

  .update-card {
    position: relative;
    top: auto;
    right: auto;
    width: max-content;
    max-width: calc(100% - 20px);
    margin: -5px 10px 0 auto;
  }

  .platform-caption {
    width: 100%;
  }

  .platform-link,
  .platform-badge {
    padding-inline: 11px;
  }

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

  .token-grid {
    grid-template-columns: 1fr;
  }

  .dl-fab {
    padding: 11px 16px;
    font-size: 14px;
  }
}

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