/* ============================================================
   DahVio Studios — shared design system
   ------------------------------------------------------------
   Direction: field manual / instrument panel.
   Typographic hierarchy and hairline rules do the work.
   No gradients. One accent per page, used as a signal.

   A product page overrides only its accent:

       <link rel="stylesheet" href="/dahvio.css">
       <style>:root { --accent: #1a7bcf; }</style>

   Everything else — type, spacing, rules, chrome — is inherited
   so the studio reads as one thing across every page.
   ============================================================ */

/* ── Tokens ─────────────────────────────────────────────── */
:root {
    --bg: #0b0c0e;
    --text: #e6e8ea;
    --dim: #868e99;
    --faint: #5c636d;
    --rule: #1c2026;
    --raise: #101318;

    /* Studio amber. Product pages override this one line. */
    --accent: #d4a24c;
    --accent-line: color-mix(in srgb, var(--accent) 35%, transparent);
    --accent-wash: color-mix(in srgb, var(--accent) 10%, transparent);

    --sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

    --measure: 62ch;
}

/* ── Base ───────────────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a {
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.container {
    max-width: 940px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ── Shared type ────────────────────────────────────────── */
.mono {
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.inline-link {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent-line);
    transition: border-color 0.15s ease;
}

.inline-link:hover {
    border-bottom-color: var(--accent);
}

.prose {
    max-width: var(--measure);
}

.prose p {
    color: var(--dim);
    margin-bottom: 1.25rem;
}

.prose strong {
    color: var(--text);
    font-weight: 500;
}

/* ── Header ─────────────────────────────────────────────── */
header {
    border-bottom: 1px solid var(--rule);
}

.header-inner {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 1.75rem 0;
    gap: 1.5rem;
}

.logo {
    font-size: 1.0625rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    text-decoration: none;
}

.logo em {
    font-style: normal;
    color: var(--accent);
}

.header-nav {
    display: flex;
    gap: 1.75rem;
}

.header-nav a {
    color: var(--dim);
    text-decoration: none;
    transition: color 0.15s ease;
}

.header-nav a:hover {
    color: var(--text);
}

/* ── Hero ───────────────────────────────────────────────── */
.hero {
    padding: 6.5rem 0 5.5rem;
    border-bottom: 1px solid var(--rule);
}

.hero h1 {
    font-size: 2.875rem;
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.15;
    max-width: 19ch;
    margin-bottom: 1.75rem;
}

.hero p {
    font-size: 1.0625rem;
    color: var(--dim);
    max-width: 58ch;
}

.hero p + p {
    margin-top: 1rem;
}

/* Eyebrow above an h1 — product pages use this for the category. */
.hero-eyebrow {
    display: block;
    color: var(--accent);
    margin-bottom: 1.25rem;
}

/* Product pages: the download / waitlist buttons under the hero copy. */
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.875rem;
    margin-top: 2.5rem;
}

.hero-meta {
    margin-top: 2.5rem;
    color: var(--faint);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
}

.hero-meta span::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    background: var(--accent);
    vertical-align: 0.2em;
    margin-right: 0.6rem;
}

/* ── Sections ───────────────────────────────────────────── */
.section {
    padding: 5rem 0;
    border-bottom: 1px solid var(--rule);
}

.section-head {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.section-num {
    color: var(--accent);
}

.section-head h2 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.015em;
}

.section-lede {
    color: var(--dim);
    max-width: var(--measure);
    margin-bottom: 3rem;
}

.subhead {
    color: var(--faint);
    padding: 0 0.875rem 0.875rem;
    margin: 0 -0.875rem 0.25rem;
    border-bottom: 1px solid var(--rule);
}

.subhead + .subhead,
.rows + .subhead {
    margin-top: 3.25rem;
}

/* ── Rows — the core list pattern ───────────────────────── */
.row {
    display: grid;
    grid-template-columns: 8.5rem 1fr 13rem 1.5rem;
    align-items: baseline;
    gap: 1.5rem;
    padding: 1.25rem 0.875rem;
    margin: 0 -0.875rem;
    border-bottom: 1px solid var(--rule);
    text-decoration: none;
    transition: background-color 0.15s ease;
}

a.row:hover {
    background: var(--raise);
}

.row-label {
    color: var(--faint);
    transition: color 0.15s ease;
}

a.row:hover .row-label {
    color: var(--accent);
}

.row-name {
    display: block;
    font-size: 1.0625rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.row-desc {
    display: block;
    color: var(--dim);
    font-size: 0.9375rem;
    line-height: 1.5;
    margin-top: 0.3rem;
}

.row-ref {
    color: var(--faint);
    transition: color 0.15s ease;
}

a.row:hover .row-ref {
    color: var(--dim);
}

.row-arrow {
    color: var(--faint);
    text-align: right;
    transition: transform 0.15s ease, color 0.15s ease;
}

a.row:hover .row-arrow {
    color: var(--accent);
    transform: translateX(3px);
}

.status {
    display: inline-block;
    margin-left: 0.625rem;
    padding: 0.05rem 0.45rem;
    border: 1px solid var(--rule);
    border-radius: 2px;
    color: var(--faint);
    vertical-align: 0.12em;
}

/* ── Archive list ───────────────────────────────────────── */
.archive {
    columns: 2;
    column-gap: 3rem;
    margin-top: 0.5rem;
}

.archive li {
    list-style: none;
    break-inside: avoid;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--rule);
}

.archive a {
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.15s ease;
}

.archive a:hover {
    color: var(--accent);
}

.archive span {
    display: block;
    color: var(--faint);
    font-size: 0.8125rem;
    line-height: 1.45;
}

/* What kind of thing it is — app, extension, web property. */
.archive .kind {
    display: inline-block;
    font-style: normal;
    margin-left: 0.5rem;
    padding: 0.05rem 0.4rem;
    border: 1px solid var(--rule);
    border-radius: 2px;
    color: var(--faint);
    font-size: 0.625rem;
    vertical-align: 0.1em;
}

/* ── Now list ───────────────────────────────────────────── */
.now-item {
    display: grid;
    grid-template-columns: 8.5rem 1fr;
    gap: 1.5rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--rule);
}

.now-item:first-child {
    border-top: 1px solid var(--rule);
}

.now-status {
    color: var(--faint);
}

.now-status.is-live {
    color: var(--accent);
}

.now-item h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.2rem;
}

.now-item p {
    color: var(--dim);
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* ── Data tables — scoring charts, standards, references ── */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
    margin: 1.5rem 0;
}

.data-table caption {
    text-align: left;
    color: var(--faint);
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding-bottom: 0.875rem;
}

.data-table th {
    text-align: left;
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    padding: 0.6rem 1rem 0.6rem 0;
    border-bottom: 1px solid var(--rule);
    white-space: nowrap;
}

.data-table td {
    padding: 0.6rem 1rem 0.6rem 0;
    border-bottom: 1px solid var(--rule);
    color: var(--dim);
    font-size: 0.9375rem;
}

.data-table td:first-child {
    color: var(--text);
    font-weight: 500;
}

.table-scroll {
    overflow-x: auto;
    margin: 1.5rem 0;
}

/* ── Plates — app screens, shown like figures in a manual ─
   Flat screenshot, hairline rule, mono caption numbered to the
   screen it shows. No device frames, shadows or perspective. */
.plates {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2.5rem;
}

.plate {
    margin: 0;
}

.plate img {
    display: block;
    width: 100%;
    border: 1px solid var(--rule);
    background: var(--raise);
}

.plate figcaption {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.875rem;
    color: var(--faint);
}

.plate-num {
    color: var(--accent);
}

/* ── Q&A — product FAQs ─────────────────────────────────── */
.qa {
    max-width: var(--measure);
}

.qa-item {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--rule);
}

.qa-item:first-child {
    border-top: 1px solid var(--rule);
}

.qa-q {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
}

.qa-a {
    color: var(--dim);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ── Callout — regulation notes, caveats ────────────────── */
.callout {
    border-left: 2px solid var(--accent);
    background: var(--raise);
    padding: 1.25rem 1.5rem;
    margin: 2rem 0;
    max-width: var(--measure);
}

.callout p {
    color: var(--dim);
    font-size: 0.9375rem;
}

.callout-label {
    display: block;
    color: var(--accent);
    margin-bottom: 0.4rem;
}

/* ── Buttons / calls to action ──────────────────────────── */
.btn {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.8125rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-decoration: none;
    padding: 0.8rem 1.4rem;
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 2px;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
    background: var(--accent);
    color: var(--bg);
}

.btn-quiet {
    border-color: var(--rule);
    color: var(--dim);
}

.btn-quiet:hover {
    background: transparent;
    border-color: var(--dim);
    color: var(--text);
}

.contact-link {
    font-size: 1.375rem;
    font-weight: 500;
    letter-spacing: -0.015em;
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
    padding-bottom: 0.2rem;
    transition: color 0.15s ease;
}

.contact-link:hover {
    color: var(--accent);
}

/* ── Footer ─────────────────────────────────────────────── */
footer {
    padding: 2.5rem 0 3.5rem;
    color: var(--faint);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem 2rem;
}

.footer-inner a {
    color: var(--faint);
    text-decoration: none;
    margin-right: 1.5rem;
    transition: color 0.15s ease;
}

.footer-inner a:hover {
    color: var(--accent);
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 800px) {
    .archive {
        columns: 1;
    }

    .plates {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .row {
        grid-template-columns: 1fr auto;
        gap: 0.35rem 1rem;
    }

    .row-label {
        grid-column: 1;
    }

    .row-arrow {
        grid-column: 2;
        grid-row: 1;
    }

    .row-main,
    .row-ref {
        grid-column: 1 / -1;
    }

    .row-ref {
        margin-top: 0.35rem;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 1.25rem;
    }

    .plates {
        grid-template-columns: 1fr;
        max-width: 300px;
    }

    .hero h1 {
        font-size: 2rem;
        max-width: none;
    }

    .hero {
        padding: 4rem 0 3.5rem;
    }

    .section {
        padding: 3.5rem 0;
    }

    .now-item {
        grid-template-columns: 1fr;
        gap: 0.4rem;
    }

    .header-nav {
        gap: 1.1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}