/* ══════════════════════════════════════════════════════════════════
     FERNSICHT — instrument panel
     A single design system for both the landing and the live viewer.
     ══════════════════════════════════════════════════════════════════ */

  :root{
    /* Tonally cool graphite. Very low chroma; not pure black. */
    --bg:          oklch(0.16 0.010 230);
    --bg-deeper:   oklch(0.13 0.010 230);
    --surface:     oklch(0.20 0.010 230);
    --surface-2:   oklch(0.23 0.012 230);
    --hairline:    oklch(0.28 0.012 230);
    --hairline-2:  oklch(0.34 0.012 230);

    /* Text ladder */
    --ink:         oklch(0.96 0.008 150);
    --ink-2:       oklch(0.78 0.010 230);
    --ink-3:       oklch(0.58 0.012 230);
    --ink-4:       oklch(0.42 0.010 230);
    --ink-5:       oklch(0.34 0.010 230);

    /* Signal colors — same chroma for harmony */
    --signal:      oklch(0.78 0.17 150);
    --signal-deep: oklch(0.68 0.17 150);
    --signal-soft: oklch(0.78 0.17 150 / 0.14);
    --signal-veil: oklch(0.78 0.17 150 / 0.06);
    --amber:       oklch(0.82 0.15 75);
    --amber-soft:  oklch(0.82 0.15 75 / 0.12);
    --red:         oklch(0.70 0.20 25);

    /* Type */
    --sans: "Inter Tight", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
    --mono: "JetBrains Mono", "SF Mono", "IBM Plex Mono", ui-monospace, monospace;

    /* Rhythm */
    --col: 1440px;
    --edge: 32px;
  }

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

  html, body { background: var(--bg); color: var(--ink); }
  body{
    font-family: var(--sans);
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "ss01", "cv11", "tnum";
    letter-spacing: -0.005em;
    min-height: 100vh;
    overflow-x: hidden;
  }

  a { color: inherit; text-decoration: none; }
  button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

  /* ── Ambient grid: a whisper-thin background grid for the entire
        instrument. Fixed so it feels like the real environment. ──── */
  body::before{
    content: "";
    position: fixed; inset: 0;
    background-image:
      linear-gradient(to right,  oklch(1 0 0 / 0.018) 1px, transparent 1px),
      linear-gradient(to bottom, oklch(1 0 0 / 0.018) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 35%, #000 40%, transparent 95%);
  }

  /* ── Shared layout shell ───────────────────────────────────────── */
  .shell{
    position: relative;
    z-index: 1;
    max-width: var(--col);
    margin: 0 auto;
    padding: 0 var(--edge);
  }

  /* ═══════════════════════════════════════════════════════════════
     TOP RAIL — persistent brand bar with calibration marks
     ═══════════════════════════════════════════════════════════════ */
  .rail{
    position: sticky; top: 0;
    z-index: 20;
    background: color-mix(in oklab, var(--bg) 88%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--hairline);
  }
  .rail-inner{
    max-width: var(--col);
    margin: 0 auto;
    padding: 0 var(--edge);
    height: 56px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 24px;
  }
  .brand{
    display: inline-flex; align-items: center; gap: 10px;
    font-weight: 500;
    letter-spacing: -0.01em;
  }
  .brand-mark{
    width: 22px; height: 22px; display: inline-block;
    position: relative;
  }
  .brand-mark svg{ width: 100%; height: 100%; display: block; }
  .brand-word{ font-size: 14px; }
  .brand-word span{ color: var(--ink-3); font-weight: 400; }

  .rail-center{
    display: inline-flex; align-items: center; gap: 16px;
    font-family: var(--mono); font-size: 10.5px;
    color: var(--ink-4);
    letter-spacing: 0.08em; text-transform: uppercase;
  }
  .rail-center .dash{ color: var(--hairline-2); }

  .rail-right{
    justify-self: end;
    display: inline-flex; align-items: center; gap: 14px;
    font-family: var(--mono); font-size: 11px;
    color: var(--ink-3);
  }
  .rail-btn{
    padding: 6px 12px;
    border: 1px solid var(--hairline);
    border-radius: 2px;
    font-family: var(--mono);
    font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--ink-2);
    transition: border-color .18s, color .18s, background .18s;
  }
  .rail-btn:hover{ border-color: var(--signal); color: var(--ink); background: var(--signal-veil); }
  .rail-btn--primary{
    color: var(--bg);
    background: var(--signal);
    border-color: var(--signal);
  }
  .rail-btn--primary:hover{ background: var(--signal-deep); color: var(--bg); }

  .live-chip{
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--mono); font-size: 10.5px;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--ink-3);
  }
  .live-chip::before{
    content: ""; width: 6px; height: 6px; border-radius: 50%;
    background: var(--signal);
    box-shadow: 0 0 0 3px var(--signal-soft);
    animation: pulse 2.4s ease-in-out infinite;
  }
  @keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.45} }

  /* ═══════════════════════════════════════════════════════════════
     HERO — the signature moment
     A tall, instrument-like composition:
       [ eyebrow / title / tagline ]   [ live panel (the viewer) ]
     ═══════════════════════════════════════════════════════════════ */

  .hero{
    position: relative;
    padding: 72px 0 56px;
    border-bottom: 1px solid var(--hairline);
  }

  /* Calibration ticks along the edges — gives the "bench instrument" feel */
  .hero::before, .hero::after{
    content: "";
    position: absolute;
    top: 0; bottom: 0; width: 1px;
    background-image: linear-gradient(to bottom,
      var(--hairline-2) 1px, transparent 1px);
    background-size: 1px 16px;
    opacity: .6;
  }
  .hero::before{ left: calc(var(--edge) - 1px); }
  .hero::after{  right: calc(var(--edge) - 1px); }

  .hero-grid{
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 540px);
    gap: 64px;
    align-items: start;
  }

  .hero-left{ padding-top: 24px; }

  .eyebrow{
    display: inline-flex; align-items: center; gap: 10px;
    font-family: var(--mono); font-size: 11px;
    letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--ink-3);
    padding: 5px 10px 5px 6px;
    border: 1px solid var(--hairline);
    border-radius: 2px;
    margin-bottom: 28px;
  }
  .eyebrow-dot{
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--signal);
  }

  .h1{
    font-family: var(--sans);
    font-weight: 500;
    font-size: clamp(44px, 6.2vw, 84px);
    line-height: 0.96;
    letter-spacing: -0.032em;
    color: var(--ink);
    margin-bottom: 24px;
    text-wrap: balance;
  }
  .h1 em{
    font-style: normal;
    color: var(--signal);
    font-weight: 500;
  }
  .h1 .slash{ color: var(--ink-5); font-weight: 400; }

  .lede{
    font-size: 18px;
    line-height: 1.55;
    color: var(--ink-2);
    max-width: 44ch;
    margin-bottom: 36px;
    text-wrap: pretty;
  }
  .lede strong{ color: var(--ink); font-weight: 500; }

  .hero-ctas{
    display: flex; flex-wrap: wrap; gap: 10px;
    margin-bottom: 44px;
  }

  .btn{
    display: inline-flex; align-items: center; gap: 10px;
    padding: 13px 18px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: 1px solid var(--hairline);
    border-radius: 2px;
    color: var(--ink);
    transition: background .18s, border-color .18s, color .18s, transform .18s;
  }
  .btn:hover{ background: var(--surface); border-color: var(--hairline-2); }
  .btn--primary{
    background: var(--signal); color: var(--bg); border-color: var(--signal);
  }
  .btn--primary:hover{ background: var(--signal-deep); border-color: var(--signal-deep); }
  .btn svg{ width: 12px; height: 12px; }

  .hero-meta{
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 32px;
    align-items: start;
    padding-top: 32px;
    border-top: 1px solid var(--hairline);
    max-width: 520px;
  }
  .meta{
    display: flex; flex-direction: column; gap: 4px;
  }
  .meta-key{
    font-family: var(--mono); font-size: 10px;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--ink-4);
  }
  .meta-val{
    font-family: var(--mono); font-size: 14px;
    color: var(--ink);
    font-variant-numeric: tabular-nums;
  }

  /* ── HERO RIGHT: the live observation panel (this IS the viewer UI) ─ */
  .panel{
    position: relative;
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: 4px;
  }
  /* thin inner stroke suggests precision milling */
  .panel::before{
    content: "";
    position: absolute; inset: 4px;
    border: 1px solid oklch(1 0 0 / 0.02);
    border-radius: 2px;
    pointer-events: none;
  }
  /* Register marks in corners */
  .reg{ position: absolute; width: 12px; height: 12px; pointer-events: none; }
  .reg::before, .reg::after{
    content: ""; position: absolute;
    background: var(--signal);
    opacity: .55;
  }
  .reg::before{ width: 10px; height: 1px; top: 0; left: 0; }
  .reg::after { width: 1px; height: 10px; top: 0; left: 0; }
  .reg--tr{ top: -1px; right: -1px; transform: scaleX(-1); }
  .reg--tl{ top: -1px; left:  -1px; }
  .reg--bl{ bottom: -1px; left:  -1px; transform: scaleY(-1); }
  .reg--br{ bottom: -1px; right: -1px; transform: scale(-1,-1); }

  .panel-strip{
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 16px;
    border-bottom: 1px solid var(--hairline);
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-4);
  }
  .panel-strip .ps-left{ display: inline-flex; align-items: center; gap: 10px; }
  .panel-strip .ps-right{ display: inline-flex; align-items: center; gap: 10px; color: var(--ink-3); }
  .panel-strip .ps-id{ color: var(--ink-2); }

  .panel-body{ padding: 28px 28px 24px; }

  .task-row{
    display: flex; align-items: baseline; justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
  }
  .task-title{
    font-size: 22px;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--ink);
  }
  .task-sub{
    font-family: var(--mono);
    font-size: 12px;
    color: var(--ink-3);
    font-variant-numeric: tabular-nums;
    margin-top: 4px;
  }
  .task-badge{
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.1em; text-transform: uppercase;
    padding: 4px 8px;
    border: 1px solid var(--signal);
    color: var(--signal);
    border-radius: 2px;
    background: var(--signal-veil);
  }

  /* The signature readout — huge, tabular, baseline-aligned */
  .readout{
    display: flex; align-items: baseline; gap: 8px;
    font-family: var(--mono);
    font-variant-numeric: tabular-nums;
    font-weight: 500;
    font-size: clamp(64px, 8vw, 104px);
    line-height: 0.95;
    letter-spacing: -0.04em;
    color: var(--ink);
    margin-top: 8px;
    margin-bottom: 20px;
  }
  .readout .pct{ font-size: 0.34em; color: var(--ink-4); font-weight: 400; transform: translateY(-0.5em); }
  .readout .frac{
    margin-left: auto;
    font-size: 12px;
    font-weight: 400;
    color: var(--ink-3);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    align-self: end;
    padding-bottom: 12px;
  }

  /* The horizon — thin precision bar with ticks, dot + glow */
  .horizon{
    position: relative;
    margin: 8px 0 6px;
  }
  .horizon-track{
    position: relative;
    height: 2px;
    background: var(--hairline);
    border-radius: 1px;
  }
  .horizon-fill{
    position: absolute; inset: 0;
    width: 62%;
    background: linear-gradient(90deg, var(--signal-deep), var(--signal));
    box-shadow: 0 0 12px var(--signal-soft);
  }
  .horizon-dot{
    position: absolute; left: 62%; top: 50%;
    width: 10px; height: 10px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background: var(--signal);
    box-shadow:
      0 0 0 3px oklch(0.78 0.17 150 / 0.25),
      0 0 16px oklch(0.78 0.17 150 / 0.5);
    animation: dot 3s ease-in-out infinite;
  }
  @keyframes dot{
    0%,100%{ box-shadow: 0 0 0 3px oklch(0.78 0.17 150 / 0.2), 0 0 10px oklch(0.78 0.17 150 / 0.4); }
    50%    { box-shadow: 0 0 0 6px oklch(0.78 0.17 150 / 0.05), 0 0 20px oklch(0.78 0.17 150 / 0.6); }
  }
  .horizon-ticks{
    display: flex; justify-content: space-between;
    margin-top: 8px;
    font-family: var(--mono); font-size: 10px;
    color: var(--ink-5);
    letter-spacing: 0.1em;
  }
  .horizon-ticks span{ position: relative; }
  .horizon-ticks span::before{
    content: ""; position: absolute;
    top: -9px; left: 50%; width: 1px; height: 4px;
    background: var(--hairline-2);
  }

  /* Stats row */
  .panel-divider{ height: 1px; background: var(--hairline); margin: 22px 0 18px; }
  .stats{
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr 1fr;
    gap: 18px;
  }
  .stat-key{
    font-family: var(--mono); font-size: 10px;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--ink-4);
    margin-bottom: 4px;
    display: block;
  }
  .stat-val{
    font-family: var(--mono);
    font-variant-numeric: tabular-nums;
    font-size: 18px;
    font-weight: 500;
    color: var(--ink);
    display: inline-flex; align-items: baseline; gap: 6px;
  }
  .stat-val small{
    font-size: 11px;
    font-weight: 400;
    color: var(--ink-4);
    letter-spacing: 0.05em;
  }
  .stat--primary .stat-val{ font-size: 22px; }
  .stat--primary .stat-val{ color: var(--signal); }

  /* A small "signal spectrum" in the panel strip — moving bars */
  .spectrum{ display: inline-flex; align-items: end; gap: 2px; height: 12px; }
  .spectrum span{
    width: 2px; background: var(--signal);
    opacity: .45;
    animation: bar 1.4s ease-in-out infinite;
  }
  .spectrum span:nth-child(1){ height: 30%; animation-delay: 0s; }
  .spectrum span:nth-child(2){ height: 60%; animation-delay: .15s; }
  .spectrum span:nth-child(3){ height: 90%; animation-delay: .3s; }
  .spectrum span:nth-child(4){ height: 50%; animation-delay: .45s; }
  .spectrum span:nth-child(5){ height: 70%; animation-delay: .6s; }
  @keyframes bar{ 0%,100%{transform: scaleY(.5); opacity: .4} 50%{transform: scaleY(1); opacity: 1} }
  .spectrum{ transform-origin: bottom; }

  /* ═══════════════════════════════════════════════════════════════
     HOW IT WORKS
     Numbered rows on a ruled surface; step 01 holds the language picker.
     ═══════════════════════════════════════════════════════════════ */
  .section{
    padding: 88px 0;
    border-bottom: 1px solid var(--hairline);
  }
  .section-head{
    display: flex; align-items: baseline; justify-content: space-between;
    gap: 24px;
    margin-bottom: 56px;
  }
  .section-kicker{
    font-family: var(--mono); font-size: 11px;
    letter-spacing: 0.16em; text-transform: uppercase;
    color: var(--ink-3);
    display: inline-flex; align-items: center; gap: 12px;
  }
  .section-kicker::before{
    content: ""; width: 20px; height: 1px; background: var(--signal);
    display: inline-block;
  }
  .section-title{
    font-size: clamp(28px, 3.3vw, 40px);
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.1;
    text-wrap: balance;
    max-width: 22ch;
  }
  .section-title em{ font-style: normal; color: var(--ink-3); }

  .steps{
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
  }
  .step{
    display: grid;
    grid-template-columns: 80px minmax(0, 1fr);
    gap: 24px;
    padding: 32px 0;
    border-top: 1px solid var(--hairline);
    position: relative;
  }
  .step:last-child{ border-bottom: 1px solid var(--hairline); }
  .step-num{
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--ink-4);
  }
  .step-num .big{
    display: block;
    font-size: 18px;
    color: var(--signal);
    margin-bottom: 6px;
    font-weight: 500;
    letter-spacing: -0.01em;
  }
  .step h3{
    font-size: 22px;
    font-weight: 500;
    letter-spacing: -0.015em;
    color: var(--ink);
    margin-bottom: 10px;
  }
  .step p{
    color: var(--ink-2);
    max-width: 60ch;
    font-size: 15px;
  }
  .step p + p{ margin-top: 10px; }

  /* ── Language picker ─────────────────────────────────────────── */
  .lang{
    margin-top: 22px;
    max-width: 780px;
  }
  .lang-tabs{
    display: flex; align-items: center; gap: 4px;
    border-bottom: 1px solid var(--hairline);
    margin-bottom: 0;
  }
  .lang-tab{
    padding: 10px 14px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-3);
    border-bottom: 1px solid transparent;
    margin-bottom: -1px;
    transition: color .18s, border-color .18s;
    position: relative;
    top: 1px;
  }
  .lang-tab:hover{ color: var(--ink); }
  .lang-tab.is-active{ color: var(--ink); border-bottom-color: var(--signal); }
  .lang-tab .tab-kind{ color: var(--ink-4); margin-right: 6px; }
  .lang-tab.is-active .tab-kind{ color: var(--signal); }
  .lang-soon{
    margin-left: auto;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-5);
    padding: 12px 4px;
  }
  .lang-soon b{ color: var(--ink-4); font-weight: 500; }

  .lang-card{
    background: var(--bg-deeper);
    border: 1px solid var(--hairline);
    border-top: 0;
    border-radius: 0 0 4px 4px;
    overflow: hidden;
  }
  .lang-pane[hidden]{ display: none; }
  .lang-install{
    display: grid;
    grid-template-columns: 88px 1fr auto;
    align-items: center;
    gap: 16px;
    padding: 12px 18px;
    background: oklch(1 0 0 / 0.015);
    border-bottom: 1px solid var(--hairline);
    font-family: var(--mono);
    font-size: 12.5px;
  }
  .lang-install-label{
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-4);
  }
  .lang-install-cmd{
    color: var(--ink);
    overflow-x: auto;
    white-space: pre;
  }
  .lang-install-cmd::-webkit-scrollbar{ height: 4px; }
  .lang-install-cmd::-webkit-scrollbar-thumb{ background: var(--hairline-2); }

  .copy-btn{
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-3);
    padding: 5px 10px;
    border: 1px solid var(--hairline);
    border-radius: 2px;
    transition: color .18s, border-color .18s, background .18s;
    flex-shrink: 0;
  }
  .copy-btn:hover{ color: var(--ink); border-color: var(--hairline-2); }
  .copy-btn.copied{ color: var(--signal); border-color: var(--signal); background: var(--signal-veil); }

  .lang-code{
    margin: 0;
    padding: 18px 20px 22px;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.7;
    color: var(--ink);
    overflow-x: auto;
    white-space: pre;
  }
  .lang-code .kw{ color: var(--signal); }
  .lang-code .str{ color: oklch(0.85 0.12 150); }
  .lang-code .cm{ color: var(--ink-4); font-style: italic; }
  .lang-code .out{ color: var(--ink-3); }
  .lang-code .arrow{ color: var(--signal); margin-right: .3em; }
  .lang-code .url{
    color: var(--signal);
    border-bottom: 1px dashed oklch(0.78 0.17 150 / 0.4);
    padding-bottom: 1px;
  }
  .lang-code .prompt{ color: var(--ink-4); user-select: none; }

  /* ═══════════════════════════════════════════════════════════════
     FREE / SUPPORT BLOCK
     ═══════════════════════════════════════════════════════════════ */
  .support{
    padding: 96px 0;
    border-bottom: 1px solid var(--hairline);
    text-align: center;
  }
  .support-frame{
    display: inline-block;
    padding: 6px 14px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--signal);
    border: 1px solid var(--signal);
    border-radius: 2px;
    margin-bottom: 28px;
    background: var(--signal-veil);
  }
  .support h2{
    font-size: clamp(32px, 4vw, 52px);
    font-weight: 500;
    letter-spacing: -0.025em;
    line-height: 1.05;
    margin-bottom: 20px;
    text-wrap: balance;
    max-width: 22ch;
    margin-left: auto; margin-right: auto;
  }
  .support h2 em{ font-style: normal; color: var(--signal); }
  .support p{
    color: var(--ink-2);
    font-size: 16px;
    max-width: 56ch;
    margin: 0 auto 36px;
    text-wrap: pretty;
  }
  .support-actions{
    display: inline-flex; flex-wrap: wrap; gap: 10px; justify-content: center;
  }

  /* ═══════════════════════════════════════════════════════════════
     FOOTER
     ═══════════════════════════════════════════════════════════════ */
  .foot{
    padding: 40px 0 64px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    align-items: center;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink-4);
    letter-spacing: 0.08em;
  }
  .foot-left{ display: inline-flex; align-items: center; gap: 16px; }
  .foot-link{ color: var(--ink-3); transition: color .18s; }
  .foot-link:hover{ color: var(--ink); }
  .foot-right{ display: inline-flex; align-items: center; gap: 20px; }
  .foot-right .dot{ width: 4px; height: 4px; background: var(--hairline-2); border-radius: 50%; }

  /* ═══════════════════════════════════════════════════════════════
     RESPONSIVE
     ═══════════════════════════════════════════════════════════════ */
  @media (max-width: 1040px){
    .hero-grid{
      grid-template-columns: 1fr;
      gap: 48px;
    }
    .hero-meta{ max-width: 100%; grid-template-columns: repeat(3, auto); }
  }
  @media (max-width: 720px){
    :root{ --edge: 20px; }
    .rail-center{ display: none; }
    .rail-inner{ grid-template-columns: 1fr auto; }
    .hero{ padding: 48px 0 40px; }
    .h1{ font-size: clamp(40px, 10vw, 56px); }
    .section{ padding: 64px 0; }
    .step{ grid-template-columns: 1fr; gap: 6px; }
    .step-num .big{ font-size: 14px; margin-bottom: 2px; }
    .stats{ grid-template-columns: 1fr 1fr; gap: 16px 18px; }
    .lang-install{ grid-template-columns: 1fr auto; gap: 10px; }
    .lang-install-label{ grid-column: 1 / -1; }
    .lang-soon{ display: none; }
    .foot{ grid-template-columns: 1fr; text-align: left; }
    .readout{ font-size: clamp(52px, 18vw, 80px); }
    .section-head{ flex-direction: column; align-items: flex-start; }
  }


/* ══════════════════════════════════════════════════════════════════
   PAGE-HEAD — used by Install / Viewer / subpages.
   A tight hero strip that sets context without repeating the homepage.
   ══════════════════════════════════════════════════════════════════ */
.page-head{
  position: relative;
  padding: 72px 0 48px;
  border-bottom: 1px solid var(--hairline);
}
.page-head::before,
.page-head::after{
  content: "";
  position: absolute;
  top: 0; bottom: 0; width: 1px;
  background-image: linear-gradient(to bottom, var(--hairline-2) 1px, transparent 1px);
  background-size: 1px 16px;
  opacity: .6;
}
.page-head::before{ left: calc(var(--edge) - 1px); }
.page-head::after { right: calc(var(--edge) - 1px); }

.page-head-inner{
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 48px;
  align-items: end;
}
.page-head h1{
  font-size: clamp(40px, 5.5vw, 72px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 0.98;
  color: var(--ink);
  margin-top: 16px;
  text-wrap: balance;
  max-width: 18ch;
}
.page-head h1 em{ font-style: normal; color: var(--signal); font-weight: 500; }
.page-head-lede{
  color: var(--ink-2);
  font-size: 17px;
  max-width: 52ch;
  margin-top: 20px;
  text-wrap: pretty;
}
.page-head-meta{
  display: grid;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-4);
  padding: 16px 20px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  min-width: 220px;
}
.page-head-meta-row{
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
}
.page-head-meta-row strong{
  color: var(--ink);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ══════════════════════════════════════════════════════════════════
   INSTALL PAGE
   ══════════════════════════════════════════════════════════════════ */
.install-body{
  padding: 56px 0 96px;
}
.install-body::before,
.install-body::after{
  content: "";
  position: absolute;
  top: 0; bottom: 0; width: 1px;
  background-image: linear-gradient(to bottom, var(--hairline-2) 1px, transparent 1px);
  background-size: 1px 16px;
  opacity: .6;
}
.install-layout{
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 64px;
  align-items: start;
}

.runtime-tabs{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 32px;
  border: 1px solid var(--hairline);
  padding: 6px;
  border-radius: 3px;
  background: var(--surface);
}
.runtime-tab{
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  text-align: left;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background .18s, color .18s, border-color .18s;
  display: grid;
  gap: 4px;
}
.runtime-tab:hover{ color: var(--ink); background: var(--surface-2); }
.runtime-tab.is-active{
  color: var(--ink);
  background: var(--signal-veil);
  border-color: var(--signal);
}
.runtime-tab .rt-kind{
  color: var(--signal);
  font-size: 13px;
  letter-spacing: 0.04em;
}
.runtime-tab .rt-sub{
  color: var(--ink-4);
  font-size: 10px;
  letter-spacing: 0.14em;
}
.runtime-tab.is-active .rt-sub{ color: var(--ink-3); }

.runtime-pane[hidden]{ display: none; }

.i-step{
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 28px;
  padding: 28px 0;
  border-top: 1px solid var(--hairline);
}
.i-step:last-child{ border-bottom: 1px solid var(--hairline); }
.i-step-num{
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-4);
  padding-top: 2px;
}
.i-step-num b{
  display: block;
  color: var(--signal);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.i-step h3{
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: 8px;
}
.i-step p{
  color: var(--ink-2);
  font-size: 15px;
  max-width: 62ch;
  margin-bottom: 16px;
}
.i-step p:last-of-type{ margin-bottom: 16px; }

.inline-code{
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink);
  background: var(--bg-deeper);
  border: 1px solid var(--hairline);
  padding: 1px 6px;
  border-radius: 2px;
}

.cmd{
  display: grid;
  grid-template-columns: 120px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 10px 14px;
  background: var(--bg-deeper);
  border: 1px solid var(--hairline);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 12.5px;
  margin-bottom: 8px;
}
.cmd-label{
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.cmd-code{
  color: var(--ink);
  overflow-x: auto;
  white-space: pre;
  min-width: 0;
}
.cmd-code::-webkit-scrollbar{ height: 4px; }
.cmd-code::-webkit-scrollbar-thumb{ background: var(--hairline-2); }

.i-output{
  margin: 12px 0 0;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-2);
  background: var(--bg-deeper);
  border-left: 2px solid var(--signal);
  border-radius: 0 2px 2px 0;
  white-space: pre-wrap;
  overflow-x: auto;
}
.i-output .arrow{ color: var(--signal); margin-right: .3em; }
.i-output .url{ color: var(--signal); border-bottom: 1px dashed oklch(0.78 0.17 150 / 0.4); }
.i-output .out-v{ color: var(--ink); }
.i-output .out-dim{ color: var(--ink-4); }

.i-code{
  margin: 8px 0 0;
  padding: 16px 18px;
  background: var(--bg-deeper);
  border: 1px solid var(--hairline);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink);
  overflow-x: auto;
  white-space: pre;
}
.i-code .kw{ color: var(--signal); }
.i-code .str{ color: oklch(0.85 0.12 150); }
.i-code .cm{ color: var(--ink-4); font-style: italic; }
.i-code .num{ color: oklch(0.82 0.15 75); }

/* Right-hand info rail */
.install-aside{
  display: grid;
  gap: 16px;
  position: sticky;
  top: 80px;
}
.side-block{
  padding: 20px;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--surface);
}
.side-block--accent{
  border-color: var(--signal);
  background: var(--signal-veil);
}
.side-kicker{
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 14px;
}
.side-list{
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 10px 14px;
  font-size: 13px;
}
.side-list dt{
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding-top: 2px;
}
.side-list dd{
  color: var(--ink-2);
}
.side-list dd code{ font-family: var(--mono); color: var(--ink); font-size: 12px; }
.side-p{
  color: var(--ink-2);
  font-size: 13px;
  margin-bottom: 12px;
}
.side-code{
  display: block;
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
  background: var(--bg-deeper);
  border: 1px solid var(--hairline);
  border-radius: 2px;
}

/* ══════════════════════════════════════════════════════════════════
   VIEWER PAGE — dedicated full layout
   A wide instrument panel with side rails:
     LEFT:  session info + share panel
     CENTER: hero readout (huge percent, horizon, stats)
     RIGHT: viewers, log, activity
   ══════════════════════════════════════════════════════════════════ */
.viewer-shell{
  min-height: calc(100vh - 56px);
  display: grid;
  grid-template-rows: 1fr auto;
}
.viewer-bench{
  padding: 40px 0 80px;
}

.bench-grid{
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

/* ── SIDE RAIL (shared by left/right side columns) ─────────────── */
.rail-block{
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--surface);
  overflow: hidden;
}
.rail-block + .rail-block{ margin-top: 16px; }
.rail-block-head{
  padding: 10px 14px;
  border-bottom: 1px solid var(--hairline);
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: oklch(1 0 0 / 0.01);
}
.rail-block-head b{ color: var(--ink-2); font-weight: 500; }
.rail-block-body{
  padding: 16px;
}
.rail-block-foot{
  padding: 10px 14px;
  border-top: 1px solid var(--hairline);
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
}

/* Session info list */
.kv{
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 10px 12px;
  font-size: 12.5px;
}
.kv dt{
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-4);
  padding-top: 2px;
}
.kv dd{
  color: var(--ink);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.kv dd.dim{ color: var(--ink-3); }

/* Share row */
.share{
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  background: var(--bg-deeper);
  overflow: hidden;
}
.share-url{
  flex: 1;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.share-btn{
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
  border-left: 1px solid var(--hairline);
  transition: background .18s, color .18s;
}
.share-btn:hover{ background: var(--signal-veil); color: var(--signal); }
.share-btn.copied{ background: var(--signal-veil); color: var(--signal); }

/* ── CENTER: main instrument ───────────────────────────────────── */
.inst{
  position: relative;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--surface);
}
.inst-strip{
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 18px;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.inst-strip-left{ display: inline-flex; align-items: center; gap: 14px; }
.inst-strip-right{ display: inline-flex; align-items: center; gap: 14px; color: var(--ink-3); }
.inst-strip-left .id{ color: var(--ink); }

.inst-body{
  padding: 40px 40px 36px;
}

.inst-head{
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 24px;
  margin-bottom: 8px;
}
.inst-task{
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.1;
}
.inst-sub{
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  margin-top: 6px;
}

.inst-readout{
  display: flex; align-items: baseline; gap: 10px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  font-size: clamp(88px, 11vw, 160px);
  line-height: 0.92;
  letter-spacing: -0.05em;
  color: var(--ink);
  margin-top: 28px;
  margin-bottom: 8px;
}
.inst-readout .pct{
  font-size: 0.28em;
  color: var(--ink-4);
  font-weight: 400;
  transform: translateY(-0.7em);
}
.inst-readout .frac{
  margin-left: auto;
  align-self: end;
  padding-bottom: 18px;
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Horizon — bigger on the dedicated page */
.inst-horizon{ margin-top: 20px; }
.inst-horizon .horizon-track{ height: 3px; background: var(--hairline); }
.inst-horizon .horizon-fill{ box-shadow: 0 0 18px var(--signal-soft); }
.inst-horizon .horizon-ticks{ font-size: 10px; margin-top: 10px; }

/* Instrument stats — bigger, clearer */
.inst-divider{ height: 1px; background: var(--hairline); margin: 32px 0 24px; }
.inst-stats{
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 24px;
}
.inst-stat{ min-width: 0; }
.inst-stat .stat-key{
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 8px;
  display: block;
}
.inst-stat-val{
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 500;
  color: var(--ink);
  display: inline-flex; align-items: baseline; gap: 8px;
  letter-spacing: -0.015em;
}
.inst-stat-val small{
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-4);
  letter-spacing: 0.04em;
}
.inst-stat--primary .inst-stat-val{ color: var(--signal); font-size: 32px; }

/* ── Sparkline (rate history) ──────────────────────────────────── */
.sparkline{
  margin-top: 14px;
  position: relative;
  height: 56px;
  border-top: 1px dashed var(--hairline);
  border-bottom: 1px dashed var(--hairline);
}
.sparkline svg{ width: 100%; height: 100%; display: block; }
.sparkline .axis{ stroke: var(--hairline-2); stroke-width: 1; }
.sparkline .line{
  fill: none;
  stroke: var(--signal);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.sparkline .fill{ fill: var(--signal-veil); }
.sparkline .tick{
  font-family: var(--mono);
  font-size: 9px;
  fill: var(--ink-5);
  letter-spacing: 0.08em;
}

/* ── Phase stepper (pre-handshake) ─────────────────────────────── */
.stepper{
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: grid;
  gap: 2px;
}
.stepper li{
  display: grid;
  grid-template-columns: 18px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 10px 0;
  font-family: var(--mono);
  font-size: 12px;
}
.stepper li + li{ border-top: 1px dashed var(--hairline); }
.stepper .dot{
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 1px solid var(--hairline-2);
  background: var(--bg);
  justify-self: center;
}
.stepper li.is-done .dot{ background: var(--signal); border-color: var(--signal); }
.stepper li.is-active .dot{
  background: var(--signal);
  border-color: var(--signal);
  box-shadow: 0 0 0 3px var(--signal-soft);
  animation: pulse 1.8s ease-in-out infinite;
}
.stepper .label{ color: var(--ink-3); letter-spacing: 0.04em; }
.stepper li.is-done  .label{ color: var(--ink-2); }
.stepper li.is-active .label{ color: var(--ink); }
.stepper .timing{ color: var(--ink-5); font-size: 10.5px; letter-spacing: 0.08em; }
.stepper-note{
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--ink-4);
  line-height: 1.55;
}

/* ── Viewer list ────────────────────────────────────────────────── */
.viewers-list{
  display: grid;
  gap: 10px;
}
.viewer-row{
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: 2px;
  transition: background .15s;
}
.viewer-row:hover{ background: var(--bg-deeper); }
.viewer-row.me{ background: var(--signal-veil); }
.viewer-avatar{
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--bg-deeper);
  display: grid; place-items: center;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--signal);
  border: 1px solid var(--hairline);
}
.viewer-name{
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink);
  letter-spacing: 0.02em;
}
.viewer-since{
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-4);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ── Live log feed ──────────────────────────────────────────────── */
.logfeed{
  max-height: 220px;
  overflow-y: auto;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--ink-2);
  padding: 14px 16px;
  background: var(--bg-deeper);
}
.logfeed::-webkit-scrollbar{ width: 4px; }
.logfeed::-webkit-scrollbar-thumb{ background: var(--hairline-2); }
.logfeed .ln{
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 10px;
  padding: 2px 0;
}
.logfeed .ts{ color: var(--ink-5); }
.logfeed .msg{ color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; }
.logfeed .msg em{ color: var(--signal); font-style: normal; }
.logfeed .msg b{ color: var(--ink); font-weight: 500; }

/* ── Metrics micro-bars ─────────────────────────────────────────── */
.metrics{
  display: grid;
  gap: 10px;
  padding: 14px 16px;
}
.metric-row{
  display: grid;
  grid-template-columns: 70px 1fr 54px;
  gap: 12px;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
}
.metric-row .k{
  color: var(--ink-4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 10px;
}
.metric-row .bar{
  position: relative;
  height: 4px;
  background: var(--hairline);
  border-radius: 1px;
  overflow: hidden;
}
.metric-row .bar i{
  position: absolute; inset: 0;
  background: var(--signal);
  width: 0;
  transition: width .4s cubic-bezier(.4,0,.2,1);
}
.metric-row .v{
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* ── Session action strip (viewer footer bar) ──────────────────── */
.viewer-bar{
  border-top: 1px solid var(--hairline);
  background: var(--bg-deeper);
  padding: 12px 0;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.08em;
}
.viewer-bar-inner{
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.viewer-bar-left, .viewer-bar-right{
  display: inline-flex; align-items: center; gap: 16px;
}
.viewer-bar .dotsep{ width: 4px; height: 4px; border-radius: 50%; background: var(--hairline-2); }
.viewer-bar .keyhint{
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--ink-4);
}
.viewer-bar .keycap{
  display: inline-block;
  padding: 2px 6px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  background: var(--surface);
  color: var(--ink-2);
  font-size: 10px;
  letter-spacing: 0;
  text-transform: none;
}

/* ── Status chips (reused on viewer page) ──────────────────────── */
.status-chip{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.status-chip.live{ color: var(--signal); border-color: var(--signal); background: var(--signal-veil); }
.status-chip.live::before{
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--signal);
  box-shadow: 0 0 0 3px var(--signal-soft);
  animation: pulse 2.4s ease-in-out infinite;
}
.status-chip.amber,
.status-chip.warn{ color: var(--amber); border-color: var(--amber); background: var(--amber-soft); }
.status-chip.amber::before,
.status-chip.warn::before{
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--amber);
}
.status-chip.error{ color: var(--red); border-color: var(--red); background: color-mix(in oklch, var(--red) 14%, transparent); }
.status-chip.error::before{
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--red);
}

/* Handshake stepper — failed state */
.stepper li.is-failed .dot{ background: var(--red); border-color: var(--red); }
.stepper li.is-failed .label{ color: var(--red); }
.stepper li.is-failed .timing{ color: var(--red); }

/* Task banner — warning + error states inside the instrument panel
   (completion uses the separate `.done-card`, see app.html inline styles). */
.task-banner{
  margin-top: 24px;
  padding: 16px 18px;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-2);
  background: var(--bg-deeper);
  position: relative;
}
/* Explicit override — the `.task-banner { display: flex }` rule above
   would otherwise defeat the user-agent [hidden]=>display:none default. */
.task-banner[hidden]{ display: none; }
.task-banner-icon{
  font-size: 22px;
  line-height: 1;
  filter: saturate(1.1);
}
.task-banner-text{
  flex: 1 1 260px;
  min-width: 0;
}
.task-banner--success{
  border-color: var(--signal);
  background: linear-gradient(135deg, var(--signal-veil), color-mix(in oklch, var(--signal) 4%, transparent));
  color: var(--ink);
  box-shadow: 0 0 0 1px color-mix(in oklch, var(--signal) 30%, transparent) inset,
              0 8px 24px -12px color-mix(in oklch, var(--signal) 60%, transparent);
}
.task-banner--warn{
  border-color: var(--amber);
  background: var(--amber-soft);
  color: var(--ink-2);
}
.task-banner--error{
  border-color: var(--red);
  background: color-mix(in oklch, var(--red) 10%, transparent);
  color: var(--ink);
}
.task-banner-link{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--signal);
  border-radius: 2px;
  background: var(--signal);
  color: var(--bg);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: transform 0.12s ease, box-shadow 0.15s ease;
}
.task-banner-link:hover{
  transform: translateY(-1px);
  box-shadow: 0 6px 18px -6px color-mix(in oklch, var(--signal) 65%, transparent);
}
.task-banner-close{
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink-4);
  width: 24px; height: 24px;
  border-radius: 2px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: color 0.12s ease, border-color 0.12s ease;
  margin-left: 2px;
}
.task-banner-close:hover{
  color: var(--ink);
  border-color: var(--hairline);
}

/* ══════════════════════════════════════════════════════════════════
   SUBPAGE RESPONSIVE
   ══════════════════════════════════════════════════════════════════ */
@media (max-width: 1180px){
  .install-layout{ grid-template-columns: 1fr; gap: 48px; }
  .install-aside{ position: static; grid-template-columns: 1fr 1fr 1fr; display: grid; gap: 16px; }
  .bench-grid{ grid-template-columns: 280px minmax(0, 1fr); }
  .bench-grid .bench-right{ grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
  .bench-grid .bench-right .rail-block{ margin-top: 0; }
}
@media (max-width: 820px){
  .page-head{ padding: 48px 0 36px; }
  .page-head-inner{ grid-template-columns: 1fr; gap: 24px; }
  .page-head-meta{ min-width: 0; }
  .viewer-bench{ padding: 20px 0 60px; }
  .bench-grid{ grid-template-columns: 1fr; gap: 16px; }
  .bench-grid .bench-right{ grid-template-columns: 1fr; }
  .bench-grid .bench-left,
  .bench-grid .bench-right{ order: 2; }
  .bench-grid .inst{ order: 1; }
  .runtime-tabs{ grid-template-columns: 1fr; }
  .install-aside{ grid-template-columns: 1fr; }
  .i-step{ grid-template-columns: 1fr; gap: 4px; }
  .cmd{ grid-template-columns: 1fr auto; gap: 8px; }
  .cmd-label{ grid-column: 1 / -1; }
  .inst-body{ padding: 28px 22px 24px; }
  .inst-readout{ font-size: clamp(64px, 20vw, 96px); }
  .inst-stats{ grid-template-columns: 1fr 1fr; gap: 20px; }
  .viewer-bar-inner{ gap: 12px; }

  /* Collapse rail-blocks on mobile: header-only by default, tap-to-expand */
  .rail-block[data-collapsible]{ cursor: pointer; }
  .rail-block[data-collapsible] .rail-block-head{
    cursor: pointer;
    user-select: none;
    position: relative;
    padding-right: 38px;
  }
  .rail-block[data-collapsible] .rail-block-head::after{
    content: "+";
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--mono);
    font-size: 14px;
    color: var(--ink-3);
    line-height: 1;
    transition: transform 0.15s ease;
  }
  .rail-block[data-collapsible].is-open .rail-block-head::after{
    content: "−";
  }
  .rail-block[data-collapsible] .rail-block-body,
  .rail-block[data-collapsible] .rail-block-foot,
  .rail-block[data-collapsible] .metrics,
  .rail-block[data-collapsible] .logfeed{
    display: none;
  }
  .rail-block[data-collapsible].is-open .rail-block-body,
  .rail-block[data-collapsible].is-open .rail-block-foot,
  .rail-block[data-collapsible].is-open .metrics,
  .rail-block[data-collapsible].is-open .logfeed{
    display: revert;
  }
}