html { background: var(--bui-page); color: var(--bui-text); font-family: var(--bui-font-sans); }
body { margin: 0; }
.demo-shell { height: 100dvh; overflow: hidden; }
.demo-sidebar { height: 100dvh; overflow-y: auto; border-right: 1px solid var(--bui-border); background: var(--bui-surface); padding: 1.1rem .8rem; scrollbar-width: thin; scrollbar-color: color-mix(in srgb, var(--bui-disabled-text) 48%, transparent) transparent; }
.demo-brand { display: block; margin: 0 .5rem 1.25rem; font-size: 1.2rem; font-weight: 700; letter-spacing: -.03em; }
.demo-brand span { color: var(--bui-primary); }
.demo-main { height: 100dvh; min-width: 0; overflow-y: auto; padding: 2rem max(clamp(1rem, 3vw, 3rem), calc((100% - 76rem) / 2)) 5rem; }
.demo-lead { max-width: 48rem; margin: .55rem 0 1.75rem; color: var(--bui-disabled-text); font-size: 1rem; line-height: 1.55; }
.demo-section { margin: 0 0 1.25rem; overflow: visible; border: 1px solid var(--bui-border); border-radius: var(--bui-radius-surface); background: var(--bui-surface); }
.demo-section > header { padding: .85rem 1rem; border-bottom: 1px solid var(--bui-border); }
.demo-section header p { margin: .35rem 0 0; color: var(--bui-disabled-text); font-size: .9rem; }
.demo-stage { padding: 1rem; }
.demo-stage > * + * { margin-top: .75rem; }
.demo-notes { color: var(--bui-disabled-text); font-size: .85rem; }
.demo-section > .demo-notes { border-top: 1px solid var(--bui-border); padding: .65rem 1rem; }
.demo-code { border-top: 1px solid var(--bui-border); background: color-mix(in srgb, var(--bui-neutral-soft) 28%, var(--bui-surface)); }
.demo-display-code > .demo-code { margin: 1rem -1rem -1rem; }
.demo-code summary { cursor: pointer; padding: .7rem 1rem; color: var(--bui-disabled-text); font-size: .8rem; font-weight: 650; letter-spacing: .01em; transition: color 150ms ease, background-color 150ms ease; }
.demo-code summary:hover { background: color-mix(in srgb, var(--bui-primary-soft) 35%, transparent); color: var(--bui-text); }
.demo-code pre { margin: 0; max-height: 34rem; overflow: auto; overflow-wrap: anywhere; border-top: 1px solid var(--bui-border); background: color-mix(in srgb, var(--bui-neutral-soft) 55%, var(--bui-surface)); padding: 1rem; font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: .79rem; line-height: 1.6; tab-size: 4; white-space: pre-wrap; word-break: normal; }
.demo-code code { font: inherit; }
.demo-code-tag, .demo-code-keyword { color: #2563eb; }
.demo-code-razor { color: #7c3aed; font-weight: 600; }
.demo-code-string { color: #0f766e; }
.demo-code-number { color: #b45309; }
.demo-code-comment { color: var(--bui-disabled-text); font-style: italic; }
[data-bui-theme="dark"] .demo-code-tag, [data-bui-theme="dark"] .demo-code-keyword { color: #7dd3fc; }
[data-bui-theme="dark"] .demo-code-razor { color: #c4b5fd; }
[data-bui-theme="dark"] .demo-code-string { color: #5eead4; }
[data-bui-theme="dark"] .demo-code-number { color: #fbbf24; }
.demo-person { display: flex; align-items: center; gap: .75rem; }
.demo-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; }
.demo-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.demo-span-2 { grid-column: 1 / -1; }
.demo-detail { padding: 1rem; }
@media (max-width: 767px) {
    .demo-shell { height: auto; overflow: visible; }
    .demo-sidebar { width: auto; height: auto; overflow: visible; border-right: 0; border-bottom: 1px solid var(--bui-border); }
    .demo-main { height: auto; overflow: visible; }
    .demo-sidebar .bui-nav-menu-vertical { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .demo-main { padding-top: 2rem; }
    .demo-form-grid { grid-template-columns: 1fr; }
}