/**
 * Design system page — presentation chrome only.
 *
 * Everything inside a specimen or section preview is the real site CSS from
 * styles.css. Nothing in this file styles a component: it only styles the
 * frames, labels and navigation around them, so a specimen can never lie
 * about how a component actually looks.
 *
 * All selectors are .ds- prefixed and scoped to .ds-page.
 */

.ds-page {
    --ds-line: var(--color-border);
    --ds-label: var(--color-text-soft);
    background: var(--color-bg);
}

/* ------------------------------------------------------------- Masthead -- */

.ds-masthead {
    background: var(--color-primary-deep);
    color: #fff;
    padding: var(--space-2xl) 0 var(--space-xl);
}

.ds-masthead h1 {
    color: #fff;
    margin: 0 0 var(--space-sm);
}

.ds-masthead__lede {
    color: rgba(255, 255, 255, 0.78);
    font-size: 1.05rem;
    max-width: 62ch;
    margin: 0 0 var(--space-lg);
}

.ds-masthead .eyebrow {
    color: var(--color-gold-soft);
}

.ds-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin: 0;
    padding: 0;
    list-style: none;
}

.ds-stats li {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.ds-stats strong {
    font-family: var(--font-display);
    font-size: 2rem;
    line-height: 1;
    color: var(--color-lime-soft);
}

.ds-stats span {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.62);
}

/* ------------------------------------------------------------------ Nav -- */

.ds-nav {
    position: sticky;
    top: var(--header-height);
    z-index: 20;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--ds-line);
}

.ds-nav__inner {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
    padding: 0.75rem 0;
}

.ds-nav a {
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--color-text-muted);
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: all 0.18s ease;
}

.ds-nav a:hover {
    color: var(--color-primary);
    border-color: var(--ds-line);
    background: var(--color-bg-cream);
}

/* -------------------------------------------------------------- Sections -- */

.ds-block {
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.ds-block__head {
    max-width: 68ch;
    margin-bottom: var(--space-lg);
}

.ds-block__head h2 {
    margin: 0.35rem 0 0.5rem;
}

.ds-block__head p {
    color: var(--color-text-muted);
    margin: 0;
}

.ds-sub {
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ds-label);
    margin: var(--space-lg) 0 var(--space-sm);
}

.ds-note {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    max-width: 70ch;
    margin: 0 0 var(--space-md);
}

/* ------------------------------------------------------------- Swatches -- */

.ds-swatches {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: var(--space-sm);
}

.ds-swatch {
    border: 1px solid var(--ds-line);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: #fff;
}

.ds-swatch__chip {
    height: 76px;
    border-bottom: 1px solid var(--ds-line);
}

.ds-swatch__meta {
    padding: 0.6rem 0.7rem 0.7rem;
}

.ds-swatch__name {
    font-weight: 700;
    font-size: 0.9rem;
    margin: 0 0 2px;
}

.ds-swatch__usage {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin: 0.3rem 0 0;
}

.ds-mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.74rem;
    color: var(--ds-label);
    display: block;
    word-break: break-all;
}

/* ----------------------------------------------------------------- Type -- */

.ds-type-row {
    border-top: 1px solid var(--color-border-light);
    padding: var(--space-md) 0;
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: var(--space-md);
    align-items: baseline;
}

.ds-type-row > .ds-mono {
    padding-top: 0.4rem;
}

.ds-type-row__note {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin: 0.35rem 0 0;
}

.ds-font {
    border: 1px solid var(--ds-line);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
}

.ds-font__specimen {
    font-size: 2rem;
    line-height: 1.1;
    margin: 0 0 0.4rem;
}

/* ---------------------------------------------------------------- Scales -- */

.ds-scale-row {
    display: grid;
    grid-template-columns: 130px 90px 1fr;
    gap: var(--space-sm);
    align-items: center;
    padding: 0.45rem 0;
    border-top: 1px solid var(--color-border-light);
}

.ds-bar {
    height: 14px;
    background: var(--color-primary);
    border-radius: 3px;
    max-width: 100%;
}

.ds-radius-demo {
    width: 74px;
    height: 52px;
    background: var(--color-bg-champagne);
    border: 1px solid var(--ds-line);
}

.ds-shadow-demo {
    width: 100%;
    height: 62px;
    background: #fff;
    border-radius: var(--radius-sm);
}

/* -------------------------------------------------------------- Specimen -- */

.ds-specimen {
    border: 1px solid var(--ds-line);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: var(--space-lg);
    background: #fff;
}

.ds-specimen__bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem var(--space-sm);
    align-items: baseline;
    justify-content: space-between;
    padding: 0.7rem var(--space-md);
    background: var(--color-bg-cream);
    border-bottom: 1px solid var(--ds-line);
}

.ds-specimen__name {
    font-weight: 700;
    font-size: 0.95rem;
}

.ds-specimen__desc {
    padding: var(--space-sm) var(--space-md) 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    max-width: 72ch;
    margin: 0;
}

.ds-specimen__stage {
    padding: var(--space-md);
}

.ds-specimen__stage--dark {
    background: var(--color-bg-charcoal);
}

.ds-variant + .ds-variant {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px dashed var(--color-border-light);
}

.ds-variant__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ds-label);
    margin: 0 0 0.6rem;
}

.ds-code {
    border-top: 1px solid var(--ds-line);
    background: #fbfaf7;
}

.ds-code summary {
    cursor: pointer;
    padding: 0.6rem var(--space-md);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    user-select: none;
}

.ds-code summary:hover {
    color: var(--color-primary);
}

.ds-code pre {
    margin: 0;
    padding: 0 var(--space-md) var(--space-md);
    overflow-x: auto;
    font-size: 0.76rem;
    line-height: 1.6;
    white-space: pre;
}

/* ---------------------------------------------------------------- Badges -- */

.ds-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    white-space: nowrap;
}

.ds-badge--buildable {
    background: #e7f6d5;
    color: #3d5c12;
}

.ds-badge--reference {
    background: var(--color-bg-sand);
    color: #5f5636;
}

/* ------------------------------------------------------- Section gallery -- */

.ds-sectionitem {
    border-top: 1px solid var(--ds-line);
}

.ds-spec {
    padding: var(--space-lg) 0 var(--space-md);
}

.ds-spec__top {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.6rem var(--space-sm);
    margin-bottom: 0.5rem;
}

.ds-spec__top h3 {
    margin: 0;
    font-size: 1.35rem;
}

.ds-spec__desc {
    color: var(--color-text-muted);
    max-width: 72ch;
    margin: 0 0 var(--space-sm);
}

.ds-facts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: var(--space-sm);
    margin: 0;
    padding: var(--space-sm) 0 0;
    border-top: 1px dashed var(--color-border-light);
}

.ds-facts div {
    min-width: 0;
}

.ds-facts dt {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ds-label);
    margin-bottom: 0.2rem;
}

.ds-facts dd {
    margin: 0;
    font-size: 0.88rem;
    color: var(--color-text);
}

.ds-preview {
    position: relative;
    border-top: 1px solid var(--ds-line);
    border-bottom: 1px solid var(--ds-line);
}

.ds-preview::before {
    content: "Live preview";
    position: absolute;
    top: 0;
    left: 0;
    z-index: 5;
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #fff;
    background: var(--color-primary);
    padding: 0.25rem 0.6rem;
    border-bottom-right-radius: var(--radius-sm);
}

/* Section previews are real sections, so neutralise their vertical rhythm a
   little — otherwise the gallery is mostly whitespace. */
.ds-preview > section {
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
}

.ds-preview .reveal {
    opacity: 1;
    transform: none;
}

.ds-empty {
    padding: var(--space-md);
    background: var(--color-bg-cream);
    border: 1px dashed var(--ds-line);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* --------------------------------------------------------------- Responsive */

@media (max-width: 780px) {
    .ds-type-row { grid-template-columns: 1fr; gap: 0.35rem; }
    .ds-scale-row { grid-template-columns: 110px 1fr; }
    .ds-scale-row .ds-mono:nth-child(2) { grid-column: 2; }
    .ds-nav { position: static; }
}

@media print {
    .ds-nav, .ds-code { display: none; }
}