.tab-shell {
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-window);
  box-shadow: var(--shadow-card);
}

.tab-list {
  display: flex;
  max-width: 100%;
  gap: 8px;
  padding: 10px;
  overflow-x: auto;
  background: var(--color-panel-soft);
  border-bottom: 1px solid var(--color-line);
  border-radius: var(--radius-window) var(--radius-window) 0 0;
  scrollbar-width: thin;
}

[role="tab"] {
  min-height: 44px;
  flex: 0 0 auto;
  padding: 9px 16px;
  color: var(--color-ink-muted);
  background: var(--color-panel-soft);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: 700;
  cursor: pointer;
}

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

[role="tab"][aria-selected="true"],
[role="tab"].is-active {
  color: var(--color-brand-deep);
  background: var(--color-panel);
  border-color: var(--color-line);
  box-shadow: var(--shadow-card);
}

[role="tabpanel"] {
  padding: clamp(20px, 4vw, 38px);
}

[role="tabpanel"][hidden] {
  display: none;
}

.toc {
  position: sticky;
  top: 18px;
  z-index: 10;
  max-width: 100%;
  padding: 12px;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.toc.is-static {
  position: static;
}

.toc-title {
  margin: 3px 10px 8px;
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 800;
}

.toc-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  padding: 8px 12px;
  color: var(--color-ink-muted);
  border-radius: var(--radius-pill);
  font-size: 14px;
  text-decoration: none;
}

.toc a:hover,
.toc a.is-current {
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
}

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

.faq-item {
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.faq-item summary {
  position: relative;
  min-height: 64px;
  padding: 19px 56px 19px 22px;
  color: var(--color-ink);
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 22px;
  width: 28px;
  height: 28px;
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
  border-radius: 50%;
  font: 700 20px/28px var(--font-body);
  text-align: center;
  transform: translateY(-50%);
}

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

.faq-answer {
  padding: 0 22px 20px;
  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: 24px;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.term-card dt {
  margin-bottom: 8px;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
}

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

.client-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  padding: clamp(22px, 4vw, 34px);
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-window);
  box-shadow: var(--shadow-near), var(--shadow-far);
}

.client-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.client-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

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

.client-actions {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  justify-content: flex-end;
  gap: 10px;
}

.client-badge {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  overflow: hidden;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 800;
}

.client-badge--top {
  color: var(--color-panel);
  background: var(--color-brand-deep);
}

.client-badge--recommended {
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
  border: 1px solid var(--color-brand);
}

.client-badge--retired {
  color: var(--color-danger);
  background: var(--color-panel);
  border: 1px solid var(--color-danger);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

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

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

.article-card .article-tag {
  align-self: flex-start;
  margin-bottom: 18px;
}

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

.article-card p {
  color: var(--color-ink-muted);
}

.article-card time {
  margin-top: auto;
  color: var(--color-ink-muted);
  font: 12px var(--font-mono);
}

.callout {
  position: relative;
  margin-block: 24px;
  padding: 20px 22px 20px 50px;
  color: var(--color-ink);
  background: var(--color-brand-soft);
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-button);
}

.callout::before {
  content: "i";
  position: absolute;
  top: 21px;
  left: 19px;
  width: 20px;
  height: 20px;
  color: var(--color-panel);
  background: var(--color-brand-deep);
  border-radius: 50%;
  font: 800 13px/20px var(--font-body);
  text-align: center;
}

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

.callout--warning::before {
  content: "!";
  background: var(--color-warning);
}

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

.dl-fab {
  position: fixed;
  z-index: 30;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  display: flex;
  max-width: min(340px, calc(100vw - 36px));
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-near), var(--shadow-far);
  text-decoration: none;
}

.dl-fab:hover {
  color: var(--color-ink);
  transform: translateY(-2px);
}

.dl-fab-icon {
  display: inline-flex;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  color: var(--color-panel);
  background: var(--color-brand-deep);
  border-radius: var(--radius-button);
}

.dl-fab-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.dl-fab-copy {
  min-width: 0;
}

.dl-fab-copy strong,
.dl-fab-copy span {
  display: block;
}

.dl-fab-copy span {
  color: var(--color-ink-muted);
  font-size: 12px;
}

.download-note-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  margin-top: 40px;
  padding: 22px;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.download-note-card__icon {
  display: inline-flex;
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  color: var(--color-panel);
  background: var(--color-brand-deep);
  border-radius: var(--radius-button);
}

.download-note-card__body > :last-child {
  margin-bottom: 0;
}

.hero-shell {
  padding-top: 24px;
  padding-bottom: 56px;
}

.hero-inner {
  width: 100%;
  max-width: min(100%, calc(1280px + var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: 47% minmax(0, 1fr);
  align-items: center;
  gap: 64px;
}

.hero-visual {
  position: relative;
  min-width: 0;
  padding: 30px 34px 26px 6px;
}

.mock-window {
  overflow: hidden;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-window);
  box-shadow: var(--shadow-near), var(--shadow-far);
  transform: rotate(-2deg);
}

.mw-titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 15px 20px;
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-line);
}

.mw-dot {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  border-radius: 50%;
}

.mw-dot--close {
  background: var(--color-window-close);
}

.mw-dot--min {
  background: var(--color-window-min);
}

.mw-dot--max {
  background: var(--color-window-max);
}

.mw-title {
  margin-left: 12px;
  color: var(--color-ink-muted);
  font-size: 13px;
  font-weight: 700;
}

.mw-body {
  display: grid;
  grid-template-columns: 172px minmax(0, 1fr);
}

.mw-side {
  padding: 18px 14px 20px;
  background: var(--color-panel-soft);
  border-right: 1px solid var(--color-line);
}

.side-label,
.main-label {
  margin: 0 4px 10px;
  color: var(--color-ink-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.group-item,
.menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  padding: 8px 10px;
  color: var(--color-ink-muted);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.group-item.is-on,
.menu-item.is-on {
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  font-weight: 700;
}

.menu-item.is-on {
  color: var(--color-brand-deep);
}

.group-dot {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  background: var(--color-line);
  border-radius: 50%;
}

.group-item.is-on .group-dot {
  background: var(--color-success);
}

.side-sep {
  height: 1px;
  margin: 14px 4px;
  background: var(--color-line);
}

.menu-item svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.mw-main {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 11px;
  padding: 22px 22px 24px;
}

.set-row {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-row);
}

.set-name {
  flex-shrink: 0;
  font-size: 13.5px;
  font-weight: 700;
}

.set-value {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 7px;
  color: var(--color-ink-muted);
  font-size: 12.5px;
  text-align: right;
}

.toggle {
  position: relative;
  width: 42px;
  height: 23px;
  flex-shrink: 0;
  background: var(--color-brand);
  border-radius: var(--radius-pill);
}

.toggle::after {
  content: "";
  position: absolute;
  top: 3px;
  right: 3px;
  width: 17px;
  height: 17px;
  background: var(--color-panel);
  border-radius: 50%;
}

.toggle-state {
  margin-right: 4px;
  color: var(--color-brand-deep);
  font-size: 12px;
  font-weight: 700;
}

.core-badge {
  padding: 4px 10px;
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
  border-radius: var(--radius-xs);
  font: 700 12px var(--font-mono);
}

.float-card {
  position: absolute;
  z-index: 2;
  top: 2px;
  right: -6px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 13px 18px;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: 16px;
  box-shadow: var(--shadow-float);
}

.float-card strong {
  font-size: 13.5px;
}

.hero-copy {
  max-width: 560px;
}

.hero-copy .accent-word {
  color: var(--color-brand);
}

.hero-desc {
  margin-bottom: 30px;
  color: var(--color-ink-muted);
  font-size: 16.5px;
}

.cta-row,
.platform-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.cta-row {
  margin-bottom: 30px;
}

.platform-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--color-ink-muted);
  font-size: 13px;
  font-weight: 600;
}

.platform-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
}

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

.platform-chip svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  fill: currentColor;
}

@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .hero-visual {
    order: 2;
    max-width: 720px;
  }

  .hero-copy {
    max-width: 680px;
  }

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

@media (max-width: 768px) {
  .glossary-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

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

  .client-actions {
    justify-content: flex-start;
  }

  .download-note-card {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .download-note-card .button {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .hero-shell {
    padding-top: 20px;
    padding-bottom: 42px;
  }

  .hero-inner {
    gap: 34px;
  }

  .hero-visual {
    padding: 26px 0 12px;
  }

  .mock-window {
    transform: none;
  }

  .mw-body {
    grid-template-columns: 112px minmax(0, 1fr);
  }

  .mw-side {
    padding-inline: 8px;
  }

  .group-item,
  .menu-item {
    padding-inline: 7px;
    font-size: 11px;
  }

  .mw-main {
    gap: 8px;
    padding: 15px 10px 16px;
  }

  .set-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
  }

  .set-value {
    text-align: left;
  }

  .float-card {
    right: 0;
    padding: 10px 13px;
  }

  .platform-row {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .platform-chip {
    padding-inline: 12px;
  }

  .dl-fab {
    right: 12px;
    bottom: 12px;
    left: 12px;
    max-width: none;
  }

  .toc {
    position: static;
  }
}