/* bTen + Server Room — public Platform pages (bten.html, server-room.html).
   A black slab with a cyan corner speed-stripe; each machine stands on a TRON grid floor.
   Colour and type come from nekotopia-theme.css tokens; the stripe is --nk-cyan at stepped
   opacity. Dark-only, like the rest of the site. */

.bten {
    --bten-slab: #060607;
    --bten-line: rgba(0, 238, 255, 0.34);
    margin: 0 0 3.5rem;
    border: 1px solid var(--nk-border);
    border-radius: var(--nk-radius);
    background: var(--bten-slab);
    color: var(--nk-text-2);
    font-family: var(--nk-sans);
    overflow: hidden;
}
.bten *,
.bten *::before,
.bten *::after { box-sizing: border-box; }
.bten [hidden] { display: none !important; }

/* ---- Slab header ------------------------------------------------------- */
.bten-head {
    position: relative;
    padding: clamp(1.5rem, 4vw, 2.25rem) clamp(1.25rem, 4vw, 2.25rem);
    padding-right: clamp(6rem, 18vw, 11rem);
    border-bottom: 1px solid var(--nk-border);
}
.bten-title {
    margin: 0 0 0.75rem;
    font-family: var(--nk-sans);
    font-size: var(--nk-section-size);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--nk-text);
    text-transform: none;
}
.bten-lede {
    margin: 0;
    max-width: 58ch;
    font-size: var(--nk-reading-size);
    line-height: var(--nk-reading-leading);
    color: var(--nk-text-3);
}
/* The stripe crosses the lower-right corner and runs off both edges, as on the Spectrum's case. */
.bten-stripe {
    position: absolute;
    right: 0;
    bottom: 0;
    width: clamp(4.5rem, 14vw, 7.5rem);
    height: auto;
    aspect-ratio: 1;
}
.bten-stripe path { fill: var(--nk-cyan); }
.bten-stripe-1 { fill-opacity: 0.25; }
.bten-stripe-2 { fill-opacity: 0.5; }
.bten-stripe-3 { fill-opacity: 0.75; }
.bten-stripe-4 { fill-opacity: 1; }
.bten-sr {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

/* ---- Host list --------------------------------------------------------- */
.bten-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.bten-list > li + li { border-top: 1px solid var(--nk-border); }
.bten.is-loading .bten-teaser,
.bten:not(.is-loading) .bten-skeleton { display: none; }

.bten-card {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    min-height: 25rem;
}

/* Art pane: the machine on a grid floor that runs to a horizon. */
.bten-art {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 15rem;
    padding: 2rem 1.5rem 3.5rem;
    border-right: 1px solid var(--nk-border);
    background: var(--nk-bg);
    overflow: hidden;
    isolation: isolate;
}
.bten-floor {
    position: absolute;
    z-index: -1;
    left: -60%;
    right: -60%;
    top: 45%;
    height: 110%;
    border-top: 1px solid var(--bten-line);
    background-image:
        repeating-linear-gradient(90deg, var(--bten-line) 0 1px, transparent 1px 44px),
        repeating-linear-gradient(0deg, var(--bten-line) 0 1px, transparent 1px 44px);
    background-position: 50% 0;
    transform: perspective(340px) rotateX(64deg);
    transform-origin: 50% 0;
    -webkit-mask-image: linear-gradient(to bottom, #000 0, rgba(0, 0, 0, 0.55) 45%, transparent 92%);
    mask-image: linear-gradient(to bottom, #000 0, rgba(0, 0, 0, 0.55) 45%, transparent 92%);
}
/* Scanlines: a fixed 1px-in-3 veil, faint enough to read as screen, not texture. */
.bten-art::after {
    content: "";
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.028) 0 1px, transparent 1px 3px);
    pointer-events: none;
}
.bten-chassis {
    display: block;
    width: 100%;
    max-width: 23rem;
    height: auto;
}
.bten-wire {
    width: 100%;
    max-width: 19rem;
    height: auto;
    color: var(--nk-cyan);
}
.bten-art-caption {
    position: absolute;
    left: 1.5rem;
    bottom: 1rem;
    margin: 0;
    font-family: var(--nk-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--nk-muted);
}

/* Copy pane */
.bten-body {
    display: flex;
    flex-direction: column;
    min-width: 0;
    padding: clamp(1.5rem, 4vw, 2.25rem);
}
.bten-family {
    margin: 0 0 0.35rem;
    font-family: var(--nk-mono);
    font-size: var(--nk-meta-size);
    letter-spacing: 0.04em;
    color: var(--nk-muted);
}
.bten-name {
    margin: 0 0 0.75rem;
    font-family: var(--nk-mono);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--nk-text);
    text-transform: none;
    overflow-wrap: anywhere;
}
/* The no-data introduction carries a sentence, not a hostname, so it is set in the sans. */
.bten-name--prose {
    font-family: var(--nk-sans);
    font-size: clamp(1.6rem, 4vw, 2.1rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    text-wrap: balance;
}
.bten-tagline {
    margin: 0 0 1.75rem;
    max-width: 52ch;
    font-size: var(--nk-reading-size);
    line-height: 1.6;
    color: var(--nk-text-2);
}

/* Spec keys: legend printed above the cap, the way a Spectrum key carries its keyword. */
.bten-keys {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
    gap: 1rem 0.75rem;
    margin: 0 0 1.75rem;
}
.bten-key { min-width: 0; margin: 0; }
.bten-key dt {
    margin: 0 0 0.4rem 0.15rem;
    font-family: var(--nk-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--nk-muted);
}
.bten-key dd {
    margin: 0;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--nk-border);
    border-radius: var(--nk-radius);
    background: var(--nk-hover);
    font-family: var(--nk-mono);
    font-size: var(--nk-meta-size);
    line-height: 1.35;
    color: var(--nk-text);
    overflow-wrap: anywhere;
}

.bten-sub {
    margin: 0 0 0.6rem;
    font-family: var(--nk-sans);
    font-size: var(--nk-detail-size);
    font-weight: 600;
    line-height: 1.3;
    color: var(--nk-text);
    text-transform: none;
}
.bten-gets {
    list-style: none;
    margin: 0 0 1.75rem;
    padding: 0;
    font-size: var(--nk-detail-size);
    line-height: 1.6;
    color: var(--nk-text-2);
}
.bten-gets li {
    position: relative;
    padding-left: 1.4rem;
}
.bten-gets li + li { margin-top: 0.3rem; }
.bten-gets li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.8em;
    width: 0.75rem;
    height: 1px;
    background: var(--nk-cyan);
}

.bten-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 1.5rem;
    margin-top: auto;
    padding-top: 1.25rem;
    border-top: 1px solid var(--nk-border-subtle);
}
.bten-status {
    margin: 0;
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    font-family: var(--nk-mono);
    font-size: var(--nk-meta-size);
    color: var(--nk-text-3);
}
.bten-led {
    flex: none;
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 50%;
    border: 1px solid var(--nk-muted);
}
.bten-status[data-state="available"] .bten-led {
    border-color: var(--nk-emerald);
    background: var(--nk-emerald);
    box-shadow: 0 0 6px var(--nk-emerald-glow);
}
.bten-status[data-state="maintenance"] .bten-led {
    border-color: var(--nk-amber);
    background: var(--nk-amber);
}

/* Links inside the slab: theme buttons, plus a focus ring the theme does not supply. */
.bten .nk-btn { min-height: 44px; padding: 0.8rem 1.5rem; text-align: center; }
.bten a:focus-visible {
    outline: 2px solid var(--nk-cyan-bright);
    outline-offset: 3px;
}
.bten .nk-btn-primary:focus-visible { outline-color: var(--nk-text); }

/* ---- Skeleton, note, footer ------------------------------------------- */
.bten-skeleton .bten-body { gap: 0.9rem; }
.bten-bone {
    display: block;
    height: 1rem;
    border-radius: var(--nk-radius-sm);
    background: var(--nk-hover);
}
.bten-bone--name { width: 55%; height: 2.4rem; }
.bten-bone--line { width: 85%; }
.bten-bone--short { width: 40%; }
.bten-bone--keys { height: 4.2rem; margin: 0.6rem 0; }

.bten-note {
    margin: 0;
    padding: 0.9rem clamp(1.25rem, 4vw, 2.25rem);
    border-top: 1px solid var(--nk-border);
    font-family: var(--nk-mono);
    font-size: var(--nk-meta-size);
    line-height: 1.5;
    color: var(--nk-text-3);
}
.bten-note:empty { display: none; }

.bten-foot {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 2rem;
    padding: 1.25rem clamp(1.25rem, 4vw, 2.25rem);
    border-top: 1px solid var(--nk-border);
    background: var(--nk-surface-2);
}
.bten-foot p {
    margin: 0;
    max-width: 60ch;
    font-size: var(--nk-detail-size);
    line-height: 1.6;
    color: var(--nk-text-3);
}

/* ---- Light as a response to state -------------------------------------- */
.bten-card:hover .bten-floor,
.bten-card:focus-within .bten-floor {
    animation: bten-floor-run 1.6s linear infinite;
}
@keyframes bten-floor-run {
    to { background-position: 50% 44px; }
}
@media (prefers-reduced-motion: reduce) {
    .bten-card:hover .bten-floor,
    .bten-card:focus-within .bten-floor { animation: none; }
    .bten .nk-btn { transition: none; }
}

/* ---- Narrow ------------------------------------------------------------ */
@media (max-width: 820px) {
    .bten-card { grid-template-columns: minmax(0, 1fr); min-height: 0; }
    .bten-art { border-right: 0; border-bottom: 1px solid var(--nk-border); min-height: 13rem; }
    .bten-skeleton .bten-body { min-height: 24rem; }
}
@media (max-width: 480px) {
    .bten-head { padding-right: clamp(1.25rem, 4vw, 2.25rem); padding-bottom: 4.5rem; }
    .bten-actions { align-items: stretch; flex-direction: column; }
    .bten .nk-btn { width: 100%; }
}

/* ---- Live cameras (bten-cams.js) ---------------------------------------- */
.bten-live {
    padding: 1.5rem clamp(1.25rem, 4vw, 2.25rem) 1.75rem;
    border-top: 1px solid var(--nk-border);
}
.bten-live-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem 1.5rem;
    margin-bottom: 1rem;
}
.bten-live-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--nk-text);
}
.bten-status[data-state="live"] .bten-led {
    border-color: var(--nk-emerald);
    background: var(--nk-emerald);
    box-shadow: 0 0 6px var(--nk-emerald-glow);
}
.bten-status[data-state="locked"] .bten-led,
.bten-status[data-state="offline"] .bten-led {
    border-color: var(--nk-amber);
    background: var(--nk-amber);
}
.bten-live-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}
.bten-cam { margin: 0; min-width: 0; }
.bten-cam-frame {
    position: relative;
    aspect-ratio: 16 / 9;
    border: 1px solid var(--nk-border);
    border-radius: var(--nk-radius-sm);
    background: var(--nk-bg);
    overflow: hidden;
}
.bten-cam video {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #000;
    cursor: zoom-in;
}
.bten-cam-msg {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 1rem;
    text-align: center;
    font-family: var(--nk-mono);
    font-size: var(--nk-meta-size);
    line-height: 1.5;
    color: var(--nk-text-3);
    background: var(--nk-bg);
}
.bten-cam-msg a { color: var(--nk-cyan-bright); }
.bten-cam figcaption {
    margin-top: 0.5rem;
    font-family: var(--nk-mono);
    font-size: var(--nk-meta-size);
    color: var(--nk-text-3);
}
@media (max-width: 820px) {
    .bten-live-grid { grid-template-columns: minmax(0, 1fr); }
}