:root {
  --table-min: 760px;
  --plan-table-min: 820px;
  --float-space: 28px;
  --float-bottom: 28px;
  --color-success-tint: rgba(46, 197, 168, .12);
  --color-warning-tint: rgba(245, 166, 91, .13);
  --color-error-tint: rgba(240, 122, 106, .12);
  --color-accent-tint: rgba(30, 111, 232, .17);
  --color-row-alt: rgba(53, 97, 141, .44);
  --color-row-hover: rgba(30, 111, 232, .18);
  --color-paper-shadow: rgba(12, 28, 48, .22);
}

.tab-shell {
  display: grid;
  grid-template-columns: minmax(220px, .72fr) minmax(0, 2fr);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
}

[role="tablist"],
.tab-list {
  display: flex;
  gap: .45rem;
}

.process-tabs {
  flex-direction: column;
  padding: .85rem;
  border-right: 1px solid var(--color-border);
  background: var(--color-bg);
}

[role="tab"] {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  gap: .75rem;
  border: 1px solid var(--color-transparent);
  border-radius: var(--radius-s);
  background: var(--color-transparent);
  color: var(--color-text-muted);
  padding: .7rem .85rem;
  text-align: left;
  cursor: pointer;
}

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

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

.process-no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .75rem;
}

.tab-panels {
  min-width: 0;
}

[role="tabpanel"] {
  min-width: 0;
  padding: clamp(1.4rem, 4vw, 3rem);
}

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

.toc-tabs {
  position: sticky;
  top: var(--header-height);
  z-index: 35;
  display: flex;
  max-width: 100%;
  gap: .35rem;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-bg);
  padding: .45rem;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.toc-tabs a {
  display: inline-flex;
  min-height: 40px;
  flex: 0 0 auto;
  align-items: center;
  border-radius: var(--radius-pill);
  padding: .45rem .8rem;
  color: var(--color-text-muted);
  font-size: .84rem;
  white-space: nowrap;
}

.toc-tabs a:hover,
.toc-tabs a.is-current {
  background: var(--color-accent);
  color: var(--color-text);
}

.faq-list {
  display: grid;
  gap: .7rem;
}

.faq-item {
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-panel);
}

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 56px;
  align-items: center;
  padding: 1rem 3.2rem 1rem 1.15rem;
  color: var(--color-text);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 1.15rem;
  color: var(--color-accent-soft);
  font-size: 1.35rem;
  line-height: 1;
}

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

.faq-answer {
  padding: 0 1.15rem 1.15rem;
  color: var(--color-text-muted);
}

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

.plan-card {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
  padding: 1.4rem;
}

.plan-card.is-featured {
  border-color: var(--color-accent);
  background: var(--color-panel-raised);
  box-shadow: 0 16px 38px var(--color-paper-shadow);
}

.plan-ribbon {
  position: absolute;
  top: .75rem;
  right: .75rem;
  border-radius: var(--radius-pill);
  background: var(--color-warning);
  color: var(--color-ink);
  padding: .28rem .58rem;
  font-size: .7rem;
  font-weight: 800;
}

.plan-period {
  color: var(--color-text-muted);
  font-size: .78rem;
  letter-spacing: .08em;
}

.plan-price {
  margin: .75rem 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 2.7rem;
  font-weight: 700;
  line-height: 1;
}

.plan-price small {
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: .85rem;
  font-weight: 500;
}

.plan-features {
  flex: 1;
  margin: .9rem 0 1.25rem;
  padding: 0;
  list-style: none;
  color: var(--color-text-muted);
}

.plan-features li {
  position: relative;
  padding: .4rem 0 .4rem 1.3rem;
}

.plan-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 800;
}

.plan-card .btn {
  width: 100%;
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  -webkit-overflow-scrolling: touch;
}

.data-table,
.server-table,
.compare-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-panel);
  color: var(--color-text-muted);
}

.server-table {
  min-width: var(--table-min);
}

.compare-table {
  min-width: var(--plan-table-min);
}

.data-table th,
.data-table td,
.server-table th,
.server-table td,
.compare-table th,
.compare-table td {
  padding: .85rem 1rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: middle;
}

.data-table th,
.server-table th,
.compare-table th {
  background: var(--color-bg);
  color: var(--color-text);
  font-size: .78rem;
  font-weight: 750;
  letter-spacing: .05em;
}

.data-table tbody tr:nth-child(even),
.server-table tbody tr:nth-child(even),
.compare-table tbody tr:nth-child(even) {
  background: var(--color-row-alt);
}

.data-table tbody tr:hover,
.server-table tbody tr:hover,
.compare-table tbody tr:hover {
  background: var(--color-row-hover);
}

.data-table th:first-child,
.data-table td:first-child,
.server-table th:first-child,
.server-table td:first-child,
.compare-table th:first-child,
.compare-table td:first-child {
  color: var(--color-text);
  font-weight: 650;
}

.table-group td {
  background: var(--color-panel-raised);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
}

.stream-ok {
  color: var(--color-success);
  font-weight: 750;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: .8rem;
}

.platform-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
  padding: 1.15rem;
}

.platform-card-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  margin-bottom: .85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  color: var(--color-accent-soft);
}

.platform-card-icon svg {
  width: 25px;
  height: 25px;
}

.platform-card h3 {
  margin-bottom: .25rem;
  font-size: 1rem;
}

.platform-card p {
  flex: 1;
  color: var(--color-text-muted);
  font-size: .82rem;
}

.platform-card .btn {
  width: 100%;
  min-height: 42px;
  padding-inline: .7rem;
  font-size: .82rem;
}

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

.article-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
  padding: 1.35rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.article-card:hover {
  border-color: var(--color-accent-soft);
  transform: translateY(-2px);
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .55rem;
  margin-bottom: .9rem;
  color: var(--color-text-muted);
  font-size: .75rem;
}

.article-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.article-card p {
  flex: 1;
  color: var(--color-text-muted);
}

.article-link {
  color: var(--color-accent-soft);
  font-weight: 700;
}

.callout {
  position: relative;
  margin-block: 1.5rem;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-s);
  background: var(--color-accent-tint);
  padding: 1rem 1.1rem 1rem 3rem;
  color: var(--color-text);
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: grid;
  width: 1.25rem;
  height: 1.25rem;
  place-items: center;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 700;
}

.callout-warning {
  border-left-color: var(--color-warning);
  background: var(--color-warning-tint);
}

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

.callout-success {
  border-left-color: var(--color-success);
  background: var(--color-success-tint);
}

.callout-success::before {
  content: "✓";
  background: var(--color-success);
  color: var(--color-ink);
}

.end-promo {
  position: relative;
  overflow: clip;
  margin-block: 2.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: linear-gradient(135deg, var(--color-panel-raised), var(--color-bg));
  padding: clamp(1.5rem, 5vw, 3rem);
}

.end-promo::after {
  content: "";
  position: absolute;
  right: -4rem;
  bottom: -6rem;
  width: 14rem;
  height: 14rem;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  pointer-events: none;
}

.end-promo-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.end-promo h2 {
  margin-bottom: .45rem;
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.end-promo p {
  max-width: 42rem;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.end-promo .btn {
  flex: 0 0 auto;
}

.float-cta {
  position: fixed;
  right: var(--float-space);
  bottom: var(--float-bottom);
  z-index: 60;
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-text);
  padding: .7rem 1.25rem;
  font-size: .9rem;
  font-weight: 750;
  box-shadow: var(--shadow-button);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.float-cta:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
}

.float-cta svg {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .8rem;
}

.swatch {
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-panel);
}

.swatch-color {
  height: 72px;
}

.swatch-meta {
  padding: .7rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: .72rem;
}

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

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

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

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

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

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

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

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

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

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

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

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

.preview-block {
  border-top: 1px solid var(--color-border);
}

.component-label {
  margin-bottom: 1rem;
  color: var(--color-accent-soft);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
}

.button-showcase {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .8rem;
}

@media (max-width: 960px) {
  .platform-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (max-width: 768px) {
  .tab-shell {
    display: block;
  }

  .process-tabs {
    flex-direction: row;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
    -webkit-overflow-scrolling: touch;
  }

  .process-tabs [role="tab"] {
    flex: 0 0 auto;
  }

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

  .plan-ribbon {
    position: static;
    align-self: flex-end;
    margin-bottom: .5rem;
  }

  .end-promo-content {
    align-items: flex-start;
    flex-direction: column;
  }

  .float-cta {
    right: 16px;
    bottom: 16px;
  }
}

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

  .platform-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: .85rem;
  }

  .platform-card-icon {
    grid-row: 1 / span 3;
  }

  .platform-card .btn {
    width: auto;
    justify-self: start;
  }

  .toc-tabs {
    border-radius: 0;
  }

  .float-cta {
    max-width: calc(100vw - 32px);
  }
}