.features-body { --header-height: var(--main-header-height); --tower-stage-height: clamp(calc(var(--space-12) * 6), 42vh, calc(var(--space-12) * 9)); padding-top: var(--header-height); background: var(--background); color: var(--foreground); }
.features-main, .features-footer { width: 100%; max-width: var(--content-max); margin-inline: auto; padding-inline: var(--space-6); }
.features-main { padding-block: var(--space-8); }
[data-layout="fluid"] .features-main, [data-layout="fluid"] .features-footer { padding-inline: var(--space-4); }
.features-main h1, .features-main h2 { margin: 0; font-weight: 500; overflow-wrap: anywhere; text-wrap: balance; }
.features-main h1 { font-size: var(--fs-display-xl); line-height: var(--lh-display); word-break: keep-all; overflow-wrap: normal; }
:lang(ja) .features-main h1, :lang(zh) .features-main h1 { word-break: normal; }
.features-main p { margin: 0; }
.features-main a, .features-footer a { color: inherit; text-underline-offset: var(--space-1); }
.features-intro { margin-bottom: var(--space-8); }
.features-lead { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-12); border-block: 1px solid var(--border-strong); padding-block: var(--space-8); }
.features-lead h2 { font-size: var(--fs-display-lg); line-height: var(--lh-display); }
.features-lead + .features-lead { border-top: 0; }
.features-lead h2 a { text-decoration: none; }
.features-action { display: inline-flex; gap: var(--space-3); align-items: center; min-height: var(--control-h-m); font-size: var(--fs-sm); font-weight: 600; }
.features-action { margin-top: var(--space-3); }
.features-preview { list-style: none; padding: 0; margin: 0; }
.features-preview li { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--space-2); padding-block: var(--space-4); border-bottom: 1px solid var(--border); }
.features-preview li a { font-size: var(--fs-body-lg); }
.features-preview li span { font-size: var(--fs-xs); color: var(--muted-foreground); }
.tower-intro { padding-bottom: var(--space-6); }
.tower-comparison { scroll-margin-top: calc(var(--header-height) + var(--space-4)); }
#tower-comparison-panel { width: 100%; min-width: 0; max-width: 100%; }
.tower-controls { width: fit-content; }
.tower-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4); }
.tower-lighting { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); }
.tower-lighting .btn { font-size: var(--fs-xs); }
.tower-toolbar[hidden], .tower-detail-render[hidden], .tower-lighting[hidden], .tower-camera[hidden] { display: none; }
.building-pending-note { color: var(--muted-foreground); font-size: var(--fs-sm); padding-bottom: var(--space-4); }
.building-sort { display: flex; width: fit-content; gap: var(--space-1); }
.building-sort .btn[aria-pressed="true"] { color: var(--foreground); background: var(--muted); }
.building-toolbar { justify-content: flex-start; column-gap: var(--space-6); }
.building-toolbar .tower-controls { order: 0; }
.building-toolbar .tower-lighting { order: 1; }
.building-toolbar .building-sort { order: 2; margin-inline-start: auto; }
.building-column-floors { margin-top: var(--space-1) !important; font-size: var(--fs-xs); font-variant-numeric: tabular-nums; }
[data-visual="bars"] .tower-illustration { visibility: hidden; }
[data-visual="bars"] .tower-chart-bar { inset-inline-start: 50%; margin-inline-start: calc(var(--space-6) * -1); width: var(--space-12); background: var(--muted-foreground); border: 0; }
[data-visual="bars"] .tower-chart-bar::before { display: none; }
.tower-detail-render { display: grid; gap: var(--space-4); }
.tower-camera { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); font-size: var(--fs-sm); }
.tower-camera .select { width: auto; min-width: calc(var(--space-12) * 3); }
.tower-camera .select-wrapper { width: auto; }
.tower-detail-render img { display: block; width: 100%; height: clamp(calc(var(--space-12) * 5), 50vh, calc(var(--space-12) * 12)); object-fit: contain; }
.tower-detail-render[aria-busy="true"] img { visibility: hidden; }
.tower-controls[hidden], .tower-detail[hidden], [data-tower-details][hidden] { display: none; }
.tower-controls .tab-trigger[aria-selected="true"] { color: var(--foreground); border-bottom-color: var(--primary); }
.tower-chart { margin: var(--space-4) 0; }
[data-tower-boot="pending"] .tower-illustration, [data-tower-boot="pending"] .tower-chart-value { opacity: 0; }
[data-tower-boot="pending"] .tower-chart-bar { transform: scaleY(0); }
.tower-lineup-scroll { overflow-x: auto; overflow-y: hidden; padding-top: var(--space-8); overscroll-behavior-x: contain; }
.tower-chart ol { display: flex; gap: var(--space-4); list-style: none; padding: 0; margin: 0; }
.tower-chart-column { flex: 1 0 calc(var(--space-8) * 4); min-width: 0; text-align: center; scroll-margin-top: var(--header-height); }
.tower-chart-track { height: var(--tower-stage-height); min-width: 0; position: relative; display: flex; justify-content: center; align-items: flex-end; border-bottom: 1px solid var(--border-strong); }
.tower-art-pending { display: block; width: 100%; height: 100%; }
.tower-illustration { display: block; flex-shrink: 0; height: 100%; width: auto; overflow: visible; transform: scale(var(--art-scale, 1)); transform-origin: center bottom; }
.tower-outline { opacity: 0; transition: opacity .2s ease; }
[data-theme="dark"] .tower-outline, [data-theme="hc-dark"] .tower-outline { filter: invert(1); }
.tower-chart-column:hover .tower-outline, .tower-chart-column:focus-within .tower-outline { opacity: 1; }
.tower-chart-bar { position: absolute; inset-block: 0; inset-inline-start: var(--space-3); width: 1px; border-inline-start: 1px dashed var(--foreground); transform-origin: center bottom; transform: scaleY(var(--tower-ratio)); pointer-events: none; }
.tower-chart-bar::before { content: ""; position: absolute; top: 0; left: calc(var(--space-2) * -1); width: var(--space-4); border-top: 1px solid var(--foreground); }
.tower-chart-value { position: absolute; bottom: 0; left: 0; right: 0; padding-bottom: var(--space-2); font-size: var(--fs-h3); font-weight: 600; font-variant-numeric: tabular-nums; transform: translateY(calc(var(--label-ratio, var(--tower-ratio)) * var(--tower-stage-height) * -1)); pointer-events: none; }
.tower-chart-column h2 { margin-top: var(--space-3); font-size: var(--fs-sm); line-height: var(--lh-body); }
.tower-column-meta { margin-top: var(--space-1) !important; font-size: var(--fs-xs); color: var(--muted-foreground); }
.tower-chart-column .btn { margin-top: var(--space-1); font-size: var(--fs-xs); }
.building-diagram-summary { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.building-diagram-count { color: var(--muted-foreground); font-size: var(--fs-xs); font-variant-numeric: tabular-nums; }
.building-pagination { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-1); max-width: 100%; font-size: var(--fs-xs); font-variant-numeric: tabular-nums; }
.building-pagination[hidden] { display: none; }
.building-pagination .btn { gap: var(--space-1); height: var(--control-h-s); min-height: var(--control-h-s); min-width: var(--control-h-s); padding: 0 var(--space-2); font-size: var(--fs-xs); line-height: 1; text-decoration: none; }
.building-page-icon { display: block; width: var(--space-4); height: var(--space-4); flex-shrink: 0; }
.building-page-picker { width: auto; }
.building-page-picker .select { height: var(--control-h-s); min-height: var(--control-h-s); padding-block: 0; font-size: var(--fs-xs); }
.building-page-picker .select-icon { width: var(--space-4); height: var(--space-4); right: auto; inset-inline-end: var(--space-2); }
.building-page-picker[hidden], [data-diagram-page-position][hidden], [data-list-page-position][hidden] { display: none; }
.building-pagination [aria-disabled="true"] { color: var(--muted-foreground); pointer-events: none; }
.building-list { margin-top: var(--space-8); scroll-margin-top: calc(var(--header-height) + var(--space-4)); }
.building-list-header h2 { font-size: var(--fs-body-lg); }
.building-list-scroll { max-height: min(calc(var(--space-12) * 10), 50vh); overflow: auto; overscroll-behavior-x: contain; }
.building-list .table { min-width: calc(var(--space-12) * 16); }
.building-list .table .building-list-number { white-space: nowrap; text-align: end; font-variant-numeric: tabular-nums; }
.building-list-name { min-width: calc(var(--space-12) * 4); max-width: calc(var(--space-12) * 5); overflow-wrap: anywhere; }
.building-list .table-sticky thead th { z-index: 2; }
.building-list .table-sticky thead .building-list-name { inset-inline-start: 0; z-index: 3; }
.building-list tbody .building-list-name { position: sticky; inset-inline-start: 0; z-index: 1; background: var(--card); font-size: inherit; font-weight: 500; box-shadow: var(--table-row-divider, inset 0 -1px 0 var(--border)); }
.building-list tbody tr:last-child .building-list-name { box-shadow: none; }
.building-list-contractors { min-width: calc(var(--space-12) * 3); }
.building-list-contractors a { color: var(--primary); text-decoration: underline; }
.building-diagram { --building-column-width: calc(var(--space-4) * 7); display: grid; grid-template-columns: var(--space-12) minmax(0, 1fr); margin-top: var(--space-2); }
.building-diagram-axis { position: relative; color: var(--muted-foreground); font-size: var(--fs-xs); font-variant-numeric: tabular-nums; text-align: end; padding-inline-end: var(--space-2); }
.building-diagram-unit { position: absolute; top: 0; inset-inline-end: var(--space-2); }
.building-diagram-ruler { position: relative; height: var(--tower-stage-height); margin-top: var(--space-8); }
.building-diagram-ruler span { position: absolute; inset-inline-end: 0; transform: translateY(50%); }
.tower-chart.building-diagram ol { position: relative; width: max-content; min-width: 100%; gap: 0; background-image: repeating-linear-gradient(to top, var(--border) 0 1px, transparent 1px var(--diagram-major-size)), repeating-linear-gradient(to top, color-mix(in srgb, var(--border) 40%, transparent) 0 1px, transparent 1px var(--diagram-minor-size)); background-size: 100% var(--tower-stage-height); background-repeat: no-repeat; }
.building-diagram[data-scale="unknown"] ol { background-image: none; }
.building-diagram ol::before { content: ""; position: absolute; top: calc(var(--tower-stage-height) - 1px); width: 100%; height: 1px; background: var(--border-strong); }
.building-diagram .tower-chart-column { padding-inline: var(--space-2); width: max(var(--building-column-width), calc(var(--tower-stage-height) * var(--art-scale) * var(--column-aspect) + var(--space-4))); flex-basis: auto; }
.building-artwork { position: relative; overflow: hidden; width: calc(var(--tower-stage-height) * var(--art-scale) * var(--art-aspect)); height: calc(var(--tower-stage-height) * var(--art-scale)); transform: none; }
.building-artwork > img { position: absolute; max-width: none; width: calc(100% * var(--image-width)); height: calc(100% * var(--image-height)); left: calc(100% * var(--image-x)); top: calc(100% * var(--image-y)); }
.building-diagram .tower-chart-track { border-bottom: 0; }
.building-diagram .tower-chart-value { font-size: var(--fs-body-lg); }
.building-diagram .tower-chart-column h2 { text-wrap: initial; word-break: keep-all; }
:lang(ja) .building-diagram .tower-chart-column h2, :lang(zh) .building-diagram .tower-chart-column h2 { word-break: normal; }
.building-diagram .tower-column-meta { padding-block: var(--space-1); }
.building-column-use, .building-column-contractors { font-size: var(--fs-xs); }
.building-column-use { padding-block: var(--space-1); }
.building-column-contractors { margin: 0; padding-block: var(--space-1); }
.building-column-contractors dt { color: var(--muted-foreground); }
.building-column-contractors dd { margin: var(--space-1) 0 0; overflow-wrap: anywhere; }
.building-column-contractors a { color: var(--primary); text-decoration: underline; text-underline-offset: 0.15em; }
.building-diagram[data-visual="bars"] .tower-chart-bar { margin-inline-start: calc(var(--space-5) * -1); width: var(--space-10); background: var(--primary); }
.building-diagram[data-visual="artwork"] .tower-chart-bar { visibility: hidden; }
@supports (grid-template-rows: subgrid) {
  .tower-chart ol { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(calc(var(--space-8) * 4), 1fr); grid-template-rows: var(--tower-stage-height) auto auto auto; row-gap: 0; }
  .tower-chart-column { display: grid; grid-template-rows: subgrid; grid-row: span 4; }
  .tower-chart.building-diagram ol { grid-auto-columns: max-content; grid-template-rows: var(--tower-stage-height) auto auto auto auto auto; }
  .building-diagram .tower-chart-column { grid-row: span 6; }
  .tower-chart-column .btn { justify-self: center; max-width: 100%; white-space: normal; }
}
.tower-detail { border-top: 1px solid var(--border-strong); padding-block: var(--space-4); scroll-margin-top: calc(var(--header-height) + var(--space-4)); }
.tower-detail-heading { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.tower-detail h2 { font-size: var(--fs-h3); }
.tower-detail dl { display: grid; grid-template-columns: repeat(auto-fit, minmax(calc(var(--space-12) * 3), 1fr)); gap: var(--space-4); margin: var(--space-4) 0; }
.tower-detail dt { font-size: var(--fs-xs); color: var(--muted-foreground); }
.tower-detail dd { margin: var(--space-1) 0 0; font-size: var(--fs-sm); line-height: var(--lh-body); }
.features-footer { display: flex; flex-wrap: wrap; gap: var(--space-6); padding-block: var(--space-4); border-top: 1px solid var(--border); font-size: var(--fs-sm); }
.features-footer a { display: inline-flex; align-items: center; min-height: var(--control-h-m); }
@media (max-width: 640px) {
  .building-pagination [data-diagram-page-label], .building-pagination [data-list-page-label] { display: none; }
  .features-main, .features-footer { padding-inline: var(--space-4); }
  .features-main h1 { font-size: var(--fs-display-lg); }
  .features-lead { grid-template-columns: minmax(0, 1fr); gap: var(--space-6); }
  .tower-chart ol { gap: var(--space-3); }
  .tower-chart-column { flex-basis: calc(var(--space-8) * 4); }
}
@media (prefers-reduced-motion: reduce) { .tower-outline { transition: none; } }