/* Browser chrome — deliberately neutral so the design systems stand out. */
:root {
    --dsb-bg: #0f1216;
    --dsb-panel: #161b22;
    --dsb-border: #2a323d;
    --dsb-text: #e6e9ee;
    --dsb-muted: #8b96a5;
    --dsb-accent: #6ea8fe;
    --dsb-top-h: 56px;
    --dsb-side-w: 260px;
}
html, body { background: var(--dsb-bg); color: var(--dsb-text); }
body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
code { color: #ffd38a; }
.dsb-dot { display: inline-block; width: 12px; height: 12px; border-radius: 50%; margin-right: .4rem; vertical-align: -1px; border: 1px solid rgba(255,255,255,.25); }

/* top bar */
.dsb-top { position: sticky; top: 0; z-index: 100; height: var(--dsb-top-h); display: flex; align-items: center; gap: 1rem; padding: 0 1rem; background: var(--dsb-panel); border-bottom: 1px solid var(--dsb-border); }
.dsb-top__home { display: flex; align-items: center; gap: .5rem; color: var(--dsb-text); text-decoration: none; font-weight: 600; }
.dsb-top__home:hover { color: var(--dsb-accent); }
.dsb-top__project { color: var(--dsb-muted); font-size: .85rem; }
.dsb-top__switch { margin-left: auto; }
.dsb-top__tabs { display: flex; gap: .25rem; }
.dsb-top__tabs a { color: var(--dsb-muted); text-decoration: none; padding: .35rem .7rem; border-radius: 6px; font-size: .9rem; }
.dsb-top__tabs a:hover { color: var(--dsb-text); background: rgba(255,255,255,.05); }
.dsb-top__tabs a.active { color: #fff; background: rgba(110,168,254,.18); }
@media (max-width: 767px) { .dsb-top__project, .dsb-top__tabs { display: none; } }

/* index */
.dsb-index__intro { max-width: 820px; }
.dsb-index__intro h1 { font-weight: 700; letter-spacing: -.01em; }
.dsb-index__intro .lead { color: var(--dsb-muted); }
.dsb-syscard { display: block; background: var(--dsb-panel); border: 1px solid var(--dsb-border); border-radius: 12px; overflow: hidden; color: var(--dsb-text); text-decoration: none; height: 100%; transition: transform .2s, border-color .2s; }
.dsb-syscard:hover { transform: translateY(-3px); border-color: var(--dsb-accent); color: var(--dsb-text); }
.dsb-syscard__preview { background: var(--bg); padding: 1rem; font-family: var(--fb); color: var(--t); }
.dsb-syscard__hero { background: var(--p); color: #fff; border-radius: var(--r); padding: 1.25rem 1rem; display: flex; flex-direction: column; gap: .35rem; }
.dsb-syscard__eyebrow { font-size: .65rem; text-transform: uppercase; letter-spacing: .15em; color: var(--c); }
.dsb-syscard__hero strong { font-family: var(--fd); font-size: 1.5rem; line-height: 1.1; }
.dsb-syscard__btn { align-self: flex-start; margin-top: .35rem; background: var(--c); color: var(--p); font-size: .7rem; font-weight: 700; padding: .35rem .7rem; border-radius: var(--r); }
.dsb-syscard__row { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; margin-top: .75rem; }
.dsb-syscard__row span { height: 42px; border-radius: var(--r); background: var(--alt); border: 1px solid rgba(0,0,0,.06); }
.dsb-syscard__row span:nth-child(2) { background: var(--a); }
.dsb-syscard__body { padding: 1.25rem; }
.dsb-syscard__tag { color: var(--dsb-accent); font-size: .9rem; margin-bottom: .5rem; }
.dsb-syscard__desc { color: var(--dsb-muted); font-size: .9rem; }
.dsb-syscard__ratio { display: flex; gap: 2px; height: 14px; margin: .75rem 0 .5rem; border-radius: 4px; overflow: hidden; border: 1px solid rgba(255,255,255,.15); }
.dsb-syscard__ratio span { display: block; }
.dsb-syscard__fonts { display: flex; gap: .5rem; flex-wrap: wrap; }
.dsb-syscard__fonts span { font-size: .75rem; color: var(--dsb-muted); background: rgba(255,255,255,.05); padding: .15rem .5rem; border-radius: 4px; }
.dsb-index__foot { color: var(--dsb-muted); max-width: 820px; }
.dsb-index__foot li { margin-bottom: .35rem; }

/* system layout */
.dsb-wrap { display: grid; grid-template-columns: var(--dsb-side-w) 1fr; min-height: calc(100vh - var(--dsb-top-h)); }
.dsb-side { position: sticky; top: var(--dsb-top-h); height: calc(100vh - var(--dsb-top-h)); overflow-y: auto; background: var(--dsb-panel); border-right: 1px solid var(--dsb-border); padding: 1rem 0 2rem; }
.dsb-side__head { display: flex; gap: .5rem; padding: .25rem 1rem 1rem; border-bottom: 1px solid var(--dsb-border); margin-bottom: .75rem; }
.dsb-side__head small { display: block; color: var(--dsb-muted); font-size: .75rem; }
.dsb-side__nav { display: flex; flex-direction: column; }
.dsb-side__label { font-size: .7rem; text-transform: uppercase; letter-spacing: .1em; color: var(--dsb-muted); padding: .9rem 1rem .3rem; }
.dsb-side__nav a { color: var(--dsb-text); text-decoration: none; padding: .3rem 1rem; font-size: .9rem; border-left: 2px solid transparent; }
.dsb-side__nav a:hover, .dsb-side__nav a.active { background: rgba(255,255,255,.04); border-left-color: var(--dsb-accent); }
.dsb-main { padding: 1.5rem 2rem 4rem; min-width: 0; }
@media (max-width: 991px) { .dsb-wrap { grid-template-columns: 1fr; } .dsb-side { display: none; } .dsb-main { padding: 1rem; } }

.dsb-sec-head { margin-bottom: 1rem; }
.dsb-sec-head h2, .dsb-sec-head h1 { font-weight: 700; margin: 0; }
.dsb-sec-head p { color: var(--dsb-muted); margin: .4rem 0 0; max-width: 760px; }
.dsb-compare-link { font-size: .8rem; color: var(--dsb-accent); text-decoration: none; }
.dsb-comp { padding: 2rem 0; border-top: 1px solid var(--dsb-border); scroll-margin-top: calc(var(--dsb-top-h) + 1rem); }
.dsb-tokens { padding-bottom: 2rem; scroll-margin-top: calc(var(--dsb-top-h) + 1rem); }

/* tokens */
.dsb-swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .75rem; margin: 1rem 0; }
.dsb-swatch { background: var(--dsb-panel); border: 1px solid var(--dsb-border); border-radius: 8px; padding: .5rem; display: flex; flex-direction: column; gap: .2rem; }
.dsb-swatch__chip { display: block; height: 44px; border-radius: 6px; border: 1px solid rgba(255,255,255,.12); }
.dsb-swatch code { font-size: .72rem; }
.dsb-swatch small { color: var(--dsb-muted); font-size: .7rem; }
.dsb-typesample { background: #fff; color: #222; border-radius: 10px; padding: 1.5rem; margin: 1rem 0; }
.dsb-typesample__display { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.05; }
.dsb-typesample__meta { display: flex; gap: 1rem; flex-wrap: wrap; font-size: .8rem; color: #666; margin: .5rem 0 1rem; }
.dsb-details summary { cursor: pointer; color: var(--dsb-muted); font-size: .9rem; }
.dsb-details table { margin-top: .5rem; font-size: .8rem; }

/* preview frame */
.dsb-preview { background: var(--dsb-panel); border: 1px solid var(--dsb-border); border-radius: 10px; overflow: hidden; }
.dsb-preview__bar { display: flex; align-items: center; gap: .5rem; padding: .5rem .75rem; border-bottom: 1px solid var(--dsb-border); }
.dsb-preview__stage { background: #d7dbe0 repeating-linear-gradient(45deg, transparent 0 10px, rgba(0,0,0,.025) 10px 20px); padding: 1rem; display: flex; justify-content: center; overflow-x: auto; }
.dsb-preview__stage iframe { display: block; width: 100%; max-width: var(--frame-w, 100%); min-height: 160px; height: 300px; border: 0; background: #fff; box-shadow: 0 2px 12px rgba(0,0,0,.15); transition: max-width .25s; }
.dsb-preview--page { border-radius: 0; border: 0; min-height: calc(100vh - var(--dsb-top-h)); }
.dsb-preview--page .dsb-preview__stage { min-height: calc(100vh - var(--dsb-top-h) - 44px); padding: 1rem; align-items: flex-start; }
.dsb-preview--page .dsb-preview__stage iframe { height: calc(100vh - var(--dsb-top-h) - 44px - 2rem); }
.dsb-error { color: #ff8a8a; background: #2b1515; padding: 1rem; border-radius: 6px; white-space: pre-wrap; width: 100%; }

/* code */
.dsb-code { margin-top: 1rem; }
.dsb-code .nav-tabs { border-color: var(--dsb-border); }
.dsb-code .nav-link { color: var(--dsb-muted); font-size: .85rem; }
.dsb-code .nav-link.active { background: var(--dsb-panel); color: var(--dsb-text); border-color: var(--dsb-border) var(--dsb-border) var(--dsb-panel); }
.dsb-code .tab-content { background: var(--dsb-panel); border: 1px solid var(--dsb-border); border-top: 0; border-radius: 0 0 8px 8px; }
.dsb-code__path { font-size: .75rem; color: var(--dsb-muted); padding: .6rem 1rem 0; margin: 0; font-family: ui-monospace, monospace; }
.dsb-codeblock { position: relative; }
.dsb-codeblock pre { margin: 0; padding: 1rem; max-height: 420px; overflow: auto; font-size: .8rem; line-height: 1.5; color: #dce3ec; }
.dsb-codeblock code { color: inherit; white-space: pre; }
.dsb-copy { position: absolute; top: .5rem; right: .5rem; background: rgba(255,255,255,.08); border: 1px solid var(--dsb-border); color: var(--dsb-text); border-radius: 6px; width: 32px; height: 32px; }
.dsb-copy:hover { background: rgba(255,255,255,.15); }
.dsb-props td:first-child { width: 160px; }
.dsb-props { font-size: .85rem; margin: 0; }

/* compare */
.dsb-compare__card { background: var(--dsb-panel); border: 1px solid var(--dsb-border); border-radius: 10px; overflow: hidden; }
.dsb-compare__head { padding: .6rem .9rem; border-bottom: 1px solid var(--dsb-border); font-weight: 600; }
.dsb-compare__head a { color: var(--dsb-text); text-decoration: none; }
.dsb-compare .dsb-preview { border: 0; border-radius: 0; }

/* rules (markdown) */
.dsb-rules__body { max-width: 860px; background: var(--dsb-panel); border: 1px solid var(--dsb-border); border-radius: 12px; padding: 2rem 2.5rem; line-height: 1.65; }
.dsb-rules__body h1 { font-weight: 700; margin-bottom: 1rem; }
.dsb-rules__body h2 { font-size: 1.35rem; margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--dsb-border); }
.dsb-rules__body h3 { font-size: 1.05rem; margin-top: 1.5rem; }
.dsb-rules__body table { width: 100%; font-size: .9rem; border-collapse: collapse; margin: 1rem 0; }
.dsb-rules__body th, .dsb-rules__body td { border: 1px solid var(--dsb-border); padding: .4rem .6rem; text-align: left; vertical-align: top; }
.dsb-rules__body pre { background: #0b0e12; padding: 1rem; border-radius: 8px; font-size: .8rem; overflow: auto; }
.dsb-rules__body blockquote { border-left: 3px solid var(--dsb-accent); margin: 1rem 0; padding: .25rem 1rem; color: var(--dsb-muted); }
.dsb-rules__body .dsb-code__path { padding: 0 0 .5rem; }

/* variants */
.dsb-top__variants { display: flex; gap: .25rem; margin-left: 1rem; padding-left: 1rem; border-left: 1px solid var(--dsb-border); }
.dsb-top__variants a { color: var(--dsb-muted); text-decoration: none; padding: .3rem .6rem; border-radius: 999px; font-size: .8rem; border: 1px solid transparent; }
.dsb-top__variants a:hover { color: var(--dsb-text); }
.dsb-top__variants a.active { color: #fff; border-color: var(--dsb-accent); }
.dsb-dev-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
@media (max-width: 1199px) { .dsb-dev-grid { grid-template-columns: 1fr; } }
.dsb-dev-card { background: var(--dsb-panel); border: 1px solid var(--dsb-border); border-radius: 10px; overflow: hidden; }
.dsb-dev-card__head { padding: .9rem 1rem; border-bottom: 1px solid var(--dsb-border); }
.dsb-dev-card__head strong { font-size: 1.05rem; }
.dsb-dev-card__head .text-secondary { font-size: .85rem; margin-left: .5rem; }
.dsb-dev-card .dsb-preview { border: 0; border-radius: 0; }
.dsb-dev-card .dsb-preview__stage { padding: 0; }
.dsb-dev-card .dsb-preview__stage iframe { height: 720px; max-width: none; box-shadow: none; }
.dsb-dev-card__foot { display: flex; gap: .5rem; align-items: flex-start; flex-wrap: wrap; padding: .75rem 1rem; border-top: 1px solid var(--dsb-border); }
.dsb-dev-card__code { flex-basis: 100%; }
.dsb-dev-card__code summary { cursor: pointer; color: var(--dsb-muted); font-family: ui-monospace, monospace; font-size: .75rem; }
.dsb-dev-card__code pre { margin: .5rem 0 0; max-height: 360px; overflow: auto; font-size: .75rem; background: #0b0e12; padding: .75rem; border-radius: 6px; color: #dce3ec; }

/* sign out + password wall */
.dsb-top__logout { display: flex; align-items: center; gap: .4rem; color: var(--dsb-muted); text-decoration: none; font-size: .85rem; padding: .35rem .6rem; border-radius: 6px; white-space: nowrap; }
.dsb-top > .dsb-top__project + .dsb-top__logout { margin-left: auto; }
.dsb-top__logout:hover { color: var(--dsb-text); background: rgba(255,255,255,.05); }
.dsb-top__logout span { display: none; }
@media (min-width: 768px) { .dsb-top__logout span { display: inline; } }
.dsb-login { min-height: calc(100vh - var(--dsb-top-h)); display: grid; place-items: center; padding: 2rem 1rem; }
.dsb-login__card { width: 100%; max-width: 420px; background: var(--dsb-panel); border: 1px solid var(--dsb-border); border-radius: 14px; padding: 2rem; }
.dsb-login__mark { width: 44px; height: 44px; border-radius: 10px; display: grid; place-items: center; background: rgba(110,168,254,.16); color: var(--dsb-accent); font-size: 1.3rem; margin-bottom: 1rem; }
.dsb-login__title { font-size: 1.5rem; font-weight: 700; letter-spacing: -.01em; margin: 0 0 .35rem; }
.dsb-login__lede { color: var(--dsb-muted); margin-bottom: 1.25rem; }
.dsb-login__error { display: flex; align-items: center; gap: .5rem; background: rgba(220,53,69,.14); border: 1px solid rgba(220,53,69,.4); color: #f8b4bc; border-radius: 8px; padding: .55rem .75rem; font-size: .9rem; margin-bottom: 1rem; }
.dsb-login__row { display: flex; gap: .5rem; }
.dsb-login__row .form-control { flex: 1; background: var(--dsb-bg); border-color: var(--dsb-border); color: var(--dsb-text); }
.dsb-login__row .form-control:focus { border-color: var(--dsb-accent); box-shadow: 0 0 0 .2rem rgba(110,168,254,.25); }
.dsb-login__note { color: var(--dsb-muted); font-size: .8rem; margin: 1rem 0 0; }