/* TrueScreenTest — "test card" design system.
   Layout: dark-first instrument panels on a faint measurement grid; broadcast colour bars as the brand signature. */
@font-face {
  font-family: "Bricolage Grotesque";
  src: url("../fonts/bricolage-latin.woff2") format("woff2");
  font-weight: 400 800; font-stretch: 75% 100%; font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/jetbrains-mono-latin.woff2") format("woff2");
  font-weight: 400 800; font-display: swap;
}

:root {
  /* colour */
  --bg: #0a0c11;
  --bg-grid: rgba(255, 255, 255, 0.035);
  --panel: #12161e;
  --panel-2: #1a202b;
  --panel-3: #232b39;
  --line: #273041;
  --line-strong: #3a4558;
  --ink: #eef2f8;
  --muted: #9ba7ba;
  --signal: #ffc53d;          /* amber: primary action + readouts */
  --signal-ink: #1b1300;
  --link: #ffd36e;
  --link-hover: #ffe6a8;
  --focus: #7cc7ff;
  --stage: #07090d;
  --good: #3ddc97;
  --warn-bg: #3a2c05;
  --warn-ink: #ffe3a1;
  --shadow: 0 1px 0 rgba(255,255,255,.04) inset, 0 20px 50px -24px rgba(0,0,0,.8);
  /* test-card bars */
  --bar-1: #c0c0c0; --bar-2: #e8d22a; --bar-3: #2fc4d6; --bar-4: #3ccf4e; --bar-5: #c94fc4; --bar-6: #e2403a; --bar-7: #3550d8;
  --bars: linear-gradient(90deg, var(--bar-1) 0 14.28%, var(--bar-2) 0 28.57%, var(--bar-3) 0 42.85%, var(--bar-4) 0 57.14%, var(--bar-5) 0 71.42%, var(--bar-6) 0 85.71%, var(--bar-7) 0);
  /* type */
  --display: "Bricolage Grotesque", ui-sans-serif, system-ui, "Segoe UI", Roboto, Arial, sans-serif;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  /* layout */
  --radius: 18px;
  --radius-sm: 12px;
  --wrap: 1180px;
  --gutter: 16px;
  --kicker: var(--signal);
  --hz: var(--signal);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #eef1f5;
    --bg-grid: rgba(16, 24, 40, 0.045);
    --panel: #ffffff;
    --panel-2: #f3f5f9;
    --panel-3: #e6eaf1;
    --line: #d6dce6;
    --line-strong: #b8c1cf;
    --ink: #0c111c;
    --muted: #4a5568;
    --link: #8a4b00;
    --link-hover: #5e3300;
    --focus: #1d4ed8;
    --warn-bg: #fff1c9;
    --warn-ink: #5c4100;
    --shadow: 0 1px 2px rgba(16,24,40,.06), 0 18px 40px -26px rgba(16,24,40,.35);
    --kicker: var(--link);
    --hz: var(--ink);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #eef1f5;
  --bg-grid: rgba(16, 24, 40, 0.045);
  --panel: #ffffff;
  --panel-2: #f3f5f9;
  --panel-3: #e6eaf1;
  --line: #d6dce6;
  --line-strong: #b8c1cf;
  --ink: #0c111c;
  --muted: #4a5568;
  --link: #8a4b00;
  --link-hover: #5e3300;
  --focus: #1d4ed8;
  --warn-bg: #fff1c9;
  --warn-ink: #5c4100;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 18px 40px -26px rgba(16,24,40,.35);
  --kicker: var(--link);
  --hz: var(--ink);
  color-scheme: light;
}
@media (min-width: 720px) { :root { --gutter: 28px; } }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--bg);
  background-image: linear-gradient(var(--bg-grid) 1px, transparent 1px), linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink);
  font: 400 1.0625rem/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: var(--link); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--link-hover); }
h1, h2, h3 { font-family: var(--display); line-height: 1.05; letter-spacing: -0.025em; margin: 0 0 0.45em; text-wrap: balance; }
h1 { font-size: clamp(2.3rem, 1.4rem + 4.2vw, 4.4rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.3rem); font-weight: 750; margin-top: 1.6em; }
h3 { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.01em; margin-top: 1.3em; line-height: 1.2; }
p, ul, ol, dl { margin: 0 0 1em; }
li + li { margin-top: 0.4em; }
strong { font-weight: 700; }
code, kbd, .mono { font-family: var(--mono); }
kbd { font-size: 0.85em; border: 1px solid var(--line-strong); border-bottom-width: 2px; border-radius: 6px; padding: 0.05em 0.45em; background: var(--panel-2); }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 6px; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 50; background: var(--signal); color: var(--signal-ink); padding: 10px 14px; border-radius: 8px; font-weight: 700; }
.skip-link:focus { top: 12px; color: var(--signal-ink); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gutter); }
.prose { max-width: 72ch; }
.bars { height: 6px; background: var(--bars); }

/* ---------- header ---------- */
.site-header { background: color-mix(in srgb, var(--bg) 88%, transparent); border-bottom: 1px solid var(--line); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 2px 16px; padding-block: 8px 4px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; min-height: 44px; }
.brand:hover { color: var(--ink); }
.logo-mark { width: 32px; height: 32px; flex: none; }
.logo-dot { fill: var(--signal); }
.logo-ring { stroke: var(--signal); opacity: 0.55; }
.brand-name { font-family: var(--display); font-size: 1.25rem; font-weight: 500; letter-spacing: -0.03em; }
.brand-name b { font-weight: 800; }
.site-nav { width: 100%; overflow-x: auto; scrollbar-width: none; margin-inline: calc(var(--gutter) * -1); padding-inline: var(--gutter); }
.site-nav::-webkit-scrollbar { display: none; }
.site-nav ul { display: flex; gap: 2px; list-style: none; margin: 0; padding: 0 0 6px; }
.site-nav li + li { margin: 0; }
.site-nav a { display: flex; align-items: center; min-height: 44px; padding: 0 13px; border-radius: 999px; color: var(--muted); text-decoration: none; font-weight: 600; font-size: 0.95rem; white-space: nowrap; }
.site-nav a:hover { color: var(--ink); background: var(--panel-2); }
.site-nav a[aria-current="page"] { color: var(--ink); background: var(--panel-3); box-shadow: inset 0 -2px 0 var(--signal); }
.site-nav .nav-all { color: var(--ink); border: 1px solid var(--line-strong); }
@media (min-width: 860px) {
  .header-inner { flex-wrap: nowrap; padding-block: 10px; }
  .site-nav { width: auto; margin: 0; padding: 0; overflow: visible; }
  .site-nav ul { padding: 0; }
}

/* ---------- hero ---------- */
.hero { padding-block: 28px 18px; }
@media (min-width: 720px) { .hero { padding-block: 44px 24px; } }
.eyebrow { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 0 0 14px; font: 600 0.78rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.eyebrow span { display: inline-flex; align-items: center; gap: 7px; }
.eyebrow span::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--good); box-shadow: 0 0 0 3px color-mix(in srgb, var(--good) 25%, transparent); }
.hero h1 { margin-bottom: 0.2em; }
.hero h1 em { font-style: normal; background: var(--bars) left bottom 0.02em / 100% 0.14em no-repeat; padding-bottom: 0.06em; }
.lede { font-size: clamp(1.05rem, 1rem + 0.3vw, 1.2rem); color: var(--muted); max-width: 60ch; margin-bottom: 0; }
.page-head { padding-block: 32px 8px; }
.page-head .lede { margin-bottom: 1em; }

/* ---------- sections + cards ---------- */
.site-main { padding-bottom: 64px; }
.section { padding-top: 12px; }
.section-kicker { font: 700 0.78rem/1 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--kicker); margin: 2.4em 0 0.6em; }
.section-kicker + h2 { margin-top: 0; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.cards { display: grid; gap: 14px; margin: 0 0 1em; }
@media (min-width: 720px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 18px 20px; min-width: 0; }
.card h3 { margin-top: 0; font-size: 1.1rem; }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card .tag { display: inline-block; font: 700 0.72rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }

.steps { list-style: none; counter-reset: step; padding: 0; display: grid; gap: 12px; }
.steps li { counter-increment: step; position: relative; padding: 16px 18px 16px 64px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm); margin: 0; }
.steps li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 18px; top: 15px; font: 700 1rem/1.6 var(--mono); color: var(--kicker); }

.note { border: 1px solid var(--line); border-left: 4px solid var(--signal); background: var(--panel); border-radius: var(--radius-sm); padding: 14px 18px; margin: 0 0 1.2em; }
.note p:last-child { margin-bottom: 0; }
.placeholder { background: var(--warn-bg); color: var(--warn-ink); padding: 0 0.3em; border-radius: 4px; font-weight: 700; }

.faq { margin-top: 0.5em; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 16px 40px 16px 0; font-weight: 700; position: relative; min-height: 44px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; top: 10px; font: 400 1.6rem/1.2 var(--mono); color: var(--kicker); }
.faq details[open] summary::after { content: "−"; }
.faq details > div { padding: 0 0 14px; color: var(--muted); }
.faq details > div p { color: var(--ink); }

/* ---------- tool kit grid (cards with pattern thumbnails) ---------- */
.kit { display: grid; gap: 14px; list-style: none; padding: 0; margin: 0 0 1em; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); }
.kit li + li { margin: 0; }
.kit a { display: flex; flex-direction: column; height: 100%; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--ink); text-decoration: none; overflow: hidden; transition: transform .18s ease, border-color .18s ease; }
.kit a:hover { transform: translateY(-3px); border-color: var(--signal); color: var(--ink); }
.kit .kit-body { padding: 14px 16px 16px; }
.kit strong { display: block; font-family: var(--display); font-size: 1.15rem; letter-spacing: -0.01em; margin-bottom: 2px; }
.kit span.kit-desc { color: var(--muted); font-size: 0.94rem; line-height: 1.45; display: block; }
.kit a[aria-current="page"] { border-color: var(--line-strong); opacity: .7; }
.thumb { position: relative; aspect-ratio: 16 / 7; max-width: 100%; border-bottom: 1px solid var(--line); background: #000; overflow: hidden; }
.thumb::after { content: ""; position: absolute; inset: 0; }
.thumb-touch { background: linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px) 0 0 / 20px 20px, linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px) 0 0 / 20px 20px, #07090d; }
.thumb-touch::after { background: radial-gradient(circle at 30% 55%, #22d3ee 0 5px, rgba(34,211,238,.25) 6px 18px, transparent 19px), radial-gradient(circle at 62% 40%, #f472b6 0 5px, rgba(244,114,182,.25) 6px 18px, transparent 19px), radial-gradient(circle at 80% 70%, #a3e635 0 5px, rgba(163,230,53,.25) 6px 18px, transparent 19px); }
.thumb-pixel { background: #050505; }
.thumb-pixel::after { background: radial-gradient(circle at 63% 42%, #ff2a2a 0 2px, transparent 3px), radial-gradient(circle at 63% 42%, transparent 0 14px, rgba(255,255,255,.5) 15px 16px, transparent 17px); }
.thumb-color { background: var(--bars); }
.thumb-color::after { top: 72%; background: linear-gradient(90deg, #000, #fff); }
.thumb-refresh { background: #0b0f16; }
.thumb-refresh::after { background: repeating-linear-gradient(90deg, transparent 0 28px, rgba(255,197,61,.18) 28px 30px), linear-gradient(90deg, transparent 0 58%, #ffc53d 58% 61%, transparent 61%); }
.thumb-ghost { background: linear-gradient(#0b0f16 0 33%, #555b66 33% 66%, #c9ced6 66%); }
.thumb-ghost::after { background: radial-gradient(ellipse 16px 9px at 70% 16%, #fff 0 98%, transparent), radial-gradient(ellipse 16px 9px at 60% 16%, rgba(255,255,255,.35) 0 98%, transparent), radial-gradient(ellipse 16px 9px at 52% 16%, rgba(255,255,255,.15) 0 98%, transparent), radial-gradient(ellipse 16px 9px at 70% 50%, #fff 0 98%, transparent), radial-gradient(ellipse 16px 9px at 70% 83%, #111 0 98%, transparent); }
.thumb-bleed { background: #020203; }
.thumb-bleed::after { background: radial-gradient(ellipse at 0 0, rgba(190,200,255,.28), transparent 38%), radial-gradient(ellipse at 100% 100%, rgba(255,230,190,.2), transparent 34%), radial-gradient(ellipse at 100% 0, rgba(190,200,255,.12), transparent 28%); }
.thumb-burn { background: #7a7a7a; }
.thumb-burn::after { background: linear-gradient(rgba(0,0,0,.08) 0 10%, transparent 10% 88%, rgba(0,0,0,.07) 88%), radial-gradient(circle at 18% 50%, rgba(0,0,0,.07) 0 14px, transparent 15px), radial-gradient(circle at 82% 50%, rgba(0,0,0,.06) 0 14px, transparent 15px); }
.thumb-check { background: linear-gradient(90deg, #000 0 20%, #fff 20% 40%, #f00 40% 60%, #0f0 60% 80%, #00f 80%); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; min-width: 44px; padding: 0 16px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: var(--panel-2); color: var(--ink);
  font: 700 0.95rem/1 var(--font); cursor: pointer; text-decoration: none;
  -webkit-tap-highlight-color: transparent; touch-action: manipulation; transition: background .15s, border-color .15s;
}
.btn:hover { border-color: var(--ink); color: var(--ink); background: var(--panel-3); }
.btn-primary { background: var(--signal); border-color: var(--signal); color: var(--signal-ink); }
.btn-primary:hover { background: #ffd56e; border-color: #ffd56e; color: var(--signal-ink); }
.btn-lg { min-height: 54px; padding: 0 26px; font-size: 1.05rem; }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn[data-action="grid"][aria-pressed="false"] { color: var(--muted); text-decoration: line-through; }

/* ---------- instrument shell shared by tools ---------- */
.instrument { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.instrument > .bars { height: 4px; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 10px; border-bottom: 1px solid var(--line); }
.toolbar .spacer { flex: 1 1 0; }
.seg { display: inline-flex; padding: 3px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line); }
.seg button { min-height: 40px; padding: 0 14px; border: 0; border-radius: 999px; background: transparent; color: var(--muted); font: 700 0.92rem/1 var(--font); cursor: pointer; touch-action: manipulation; }
.seg button[aria-checked="true"] { background: var(--panel-3); color: var(--ink); box-shadow: inset 0 -2px 0 var(--signal); }

.readouts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); margin: 0; border-top: 1px solid var(--line); }
@media (min-width: 760px) { .readouts { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
.readouts > div { background: var(--panel); padding: 12px 16px; min-width: 0; }
.readouts dt { font: 700 0.7rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.readouts dd { margin: 4px 0 0; font: 700 1.35rem/1.2 var(--mono); font-variant-numeric: tabular-nums; color: var(--ink); overflow-wrap: anywhere; }
.readouts .wide { grid-column: 1 / -1; }
@media (min-width: 760px) { .readouts .wide { grid-column: auto; } }
.readouts dd.is-mouse { color: #f59e0b; font-size: 1rem; }
.meter { height: 6px; border-radius: 3px; background: var(--panel-3); margin-top: 8px; overflow: hidden; }
.meter i { display: block; height: 100%; width: var(--coverage, 0%); background: var(--bars); background-size: 100vw 100%; transition: width .2s; }

/* ---------- touch screen test ---------- */
.tst { display: flex; flex-direction: column; }
.tst-stage {
  position: relative; height: clamp(360px, 64svh, 760px); background: var(--stage);
  touch-action: none; overscroll-behavior: contain; user-select: none; -webkit-user-select: none;
  -webkit-touch-callout: none; -webkit-tap-highlight-color: transparent; cursor: crosshair;
}
.tst-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.tst-stage.grid-off .tst-grid { opacity: 0; }
.tst-hint { position: absolute; inset: 0; display: grid; place-items: center; margin: 0; padding: 24px; text-align: center; color: #e9eef6; pointer-events: none; transition: opacity .25s; }
.tst-hint > div { max-width: 32ch; }
.tst-hint .ring { width: 74px; height: 74px; margin: 0 auto 14px; border-radius: 50%; border: 2px solid rgba(255,197,61,.85); position: relative; }
.tst-hint .ring::before { content: ""; position: absolute; inset: 26px; border-radius: 50%; background: #ffc53d; }
.tst-hint .ring::after { content: ""; position: absolute; inset: -2px; border-radius: 50%; border: 2px solid #ffc53d; animation: ping 1.8s ease-out infinite; }
@keyframes ping { from { transform: scale(1); opacity: .9; } to { transform: scale(1.9); opacity: 0; } }
.tst-hint strong { display: block; font: 750 1.5rem/1.2 var(--display); margin-bottom: 6px; }
.tst-hint span { color: #a9b4c3; font-size: 0.98rem; }
.tst-hint.is-hidden { opacity: 0; }
.tst-status { margin: 0; padding: 10px 16px; font-size: 0.92rem; color: var(--muted); border-top: 1px solid var(--line); }
.tst-status:empty { display: none; }

/* floating controls shown only in fullscreen */
.tst-pill {
  position: absolute; left: 50%; top: max(10px, env(safe-area-inset-top)); transform: translateX(-50%);
  display: none; align-items: center; gap: 6px; padding: 6px; border-radius: 999px;
  background: rgba(10, 12, 17, 0.84); border: 1px solid rgba(255,255,255,.16); color: #fff;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); z-index: 5; max-width: calc(100% - 20px);
}
.tst-pill.at-bottom { top: auto; bottom: max(10px, env(safe-area-inset-bottom)); }
.tst-pill button { min-height: 44px; min-width: 44px; padding: 0 14px; border-radius: 999px; border: 0; cursor: pointer; background: rgba(255,255,255,.12); color: #fff; font: 700 0.9rem/1 var(--font); touch-action: manipulation; display: inline-flex; align-items: center; gap: 6px; }
.tst-pill button:hover { background: rgba(255,255,255,.22); }
.tst-pill .pill-exit { background: #ffc53d; color: #1b1300; }
.tst-pill .pill-exit:hover { background: #ffd56e; }
.tst-pill svg { width: 18px; height: 18px; flex: none; }
.tst-pill output { font: 700 0.85rem/1 var(--mono); padding: 0 8px; white-space: nowrap; }
@media (max-width: 420px) { .tst-pill .pill-label { display: none; } .tst-pill output { padding: 0 4px; } }

.tst.is-fs { border: 0; border-radius: 0; width: 100%; height: 100%; background: var(--stage); box-shadow: none; }
.tst.is-fs > .bars, .tst.is-fs .toolbar, .tst.is-fs .readouts, .tst.is-fs .tst-status { display: none; }
.tst.is-fs .tst-stage { flex: 1 1 auto; height: auto; }
.tst.is-fs .tst-pill { display: flex; }
.tst.is-pseudo-fs { position: fixed; inset: 0; z-index: 1000; height: 100vh; height: 100dvh; }
html.fs-lock, html.fs-lock body { overflow: hidden; overscroll-behavior: none; }
html.fs-lock .ad-slot { display: none !important; }
.tst:fullscreen { width: 100vw; height: 100vh; }

/* ---------- motion tools (refresh rate + ghosting) ---------- */
.hz-hero { display: grid; gap: 1px; background: var(--line); }
@media (min-width: 760px) { .hz-hero { grid-template-columns: 1.2fr 1fr; } }
.hz-main, .hz-side { background: var(--panel); padding: 22px; min-width: 0; }
.hz-label { font: 700 0.72rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin: 0 0 6px; }
.hz-value { font: 800 clamp(4rem, 3rem + 7vw, 8.5rem)/0.9 var(--mono); letter-spacing: -0.04em; font-variant-numeric: tabular-nums; color: var(--hz); margin: 0; }
.hz-value small { font-size: 0.32em; letter-spacing: 0; color: var(--muted); margin-left: 6px; }
.hz-sub { color: var(--muted); margin: 10px 0 0; min-height: 1.6em; }
.hz-side dl { display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; margin: 0; }
.hz-side dt { color: var(--muted); }
.hz-side dd { margin: 0; font: 700 1rem/1.5 var(--mono); font-variant-numeric: tabular-nums; text-align: right; }
.frame-graph { width: 100%; height: 90px; margin-top: 14px; border-radius: 8px; background: var(--bg); }
.motion-strip { position: relative; height: 72px; background: var(--stage); border-top: 1px solid var(--line); overflow: hidden; }
.motion-strip canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.ghost-stage { position: relative; background: #000; height: clamp(300px, 56svh, 620px); }
.ghost-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.ghost.is-fs { width: 100%; height: 100%; display: flex; flex-direction: column; border-radius: 0; border: 0; }
.ghost.is-fs .ghost-stage { flex: 1 1 auto; height: auto; }
.ghost.is-pseudo-fs { position: fixed; inset: 0; z-index: 1000; height: 100dvh; }
.ghost.is-fs > .bars, .ghost.is-fs .readouts { display: none; }
.ghost.is-fs .toolbar { background: rgba(10,12,17,.9); border-color: #273041; }

/* ---------- swatches + fullscreen viewer ---------- */
.start-row { display: flex; flex-wrap: wrap; gap: 12px 16px; align-items: center; margin: 4px 0 22px; }
.start-row .hint-text { color: var(--muted); }
.swatch-group h2 { margin-top: 1.2em; font-size: 1.35rem; }
.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; list-style: none; padding: 0; margin: 0 0 8px; }
.swatches li + li { margin: 0; }
.swatch { width: 100%; display: flex; flex-direction: column; align-items: stretch; padding: 0; cursor: pointer; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--panel); color: var(--ink); font: 700 0.92rem/1.2 var(--font); text-align: left; overflow: hidden; touch-action: manipulation; transition: transform .15s, border-color .15s; }
.swatch:hover { border-color: var(--signal); transform: translateY(-2px); }
.swatch .chip { display: block; height: 78px; border-bottom: 1px solid var(--line); background: #777; }
.swatch .label { display: block; padding: 10px 12px; min-height: 44px; }

.viewer { position: fixed; inset: 0; z-index: 2000; background: #000; cursor: pointer; touch-action: manipulation; user-select: none; -webkit-user-select: none; -webkit-tap-highlight-color: transparent; }
.viewer.idle { cursor: none; }
.viewer-bar { position: absolute; left: 50%; bottom: max(14px, env(safe-area-inset-bottom)); transform: translateX(-50%); display: flex; align-items: center; gap: 6px; padding: 6px; border-radius: 999px; cursor: default; background: rgba(10, 12, 17, 0.86); border: 1px solid rgba(255,255,255,.2); color: #fff; transition: opacity .25s; max-width: calc(100% - 20px); }
.viewer.idle .viewer-bar, .viewer.idle .viewer-tip { opacity: 0; pointer-events: none; }
.viewer-bar button { min-height: 44px; min-width: 44px; padding: 0 14px; border: 0; border-radius: 999px; cursor: pointer; background: rgba(255,255,255,.14); color: #fff; font: 700 0.9rem/1 var(--font); display: inline-flex; align-items: center; gap: 6px; }
.viewer-bar button:hover { background: rgba(255,255,255,.25); }
.viewer-bar .viewer-exit { background: #ffc53d; color: #1b1300; }
.viewer-bar svg { width: 18px; height: 18px; flex: none; }
.viewer-name { font: 700 0.88rem/1.2 var(--font); padding: 0 8px; text-align: center; min-width: 7em; }
.viewer-name small { display: block; font: 600 0.75rem/1.2 var(--mono); opacity: .75; }
.viewer-tip { position: absolute; left: 50%; top: max(14px, env(safe-area-inset-top)); transform: translateX(-50%); max-width: min(560px, calc(100% - 24px)); padding: 10px 16px; border-radius: 14px; background: rgba(10,12,17,.86); border: 1px solid rgba(255,255,255,.2); color: #fff; font-size: 0.95rem; line-height: 1.4; text-align: center; transition: opacity .25s; cursor: default; }
.viewer-tip:empty { display: none; }
@media (max-width: 420px) { .viewer-bar .btn-text { display: none; } }

/* ---------- ads (rendered only when configured) ---------- */
.ad-slot { margin: 28px auto; max-width: var(--wrap); padding-inline: var(--gutter); min-height: 100px; }
.ad-label { display: block; font: 600 0.7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin-bottom: 6px; }
.adsbygoogle { display: block; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--panel); font-size: 0.95rem; }
.footer-inner { display: grid; gap: 24px; padding-block: 36px 12px; }
@media (min-width: 760px) { .footer-inner { grid-template-columns: 1.6fr 1fr 1fr; } }
.footer-brand p { color: var(--muted); max-width: 42ch; margin-top: 8px; }
.site-footer h2 { font: 700 0.75rem/1 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin: 0 0 10px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li + li { margin: 0; }
.site-footer nav a { display: inline-flex; align-items: center; min-height: 40px; color: var(--ink); text-decoration: none; }
.site-footer nav a:hover { color: var(--link); text-decoration: underline; }
.footer-note { padding-block: 16px 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.88rem; }
.footer-note p { margin: 0; }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }
.hz-main h2 { margin-top: 0.2em; }

/* ---------- theme toggle ---------- */
.header-tools { display: flex; align-items: center; gap: 8px; }
.theme-toggle { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-strong); background: var(--panel-2); color: var(--ink); display: inline-grid; place-items: center; cursor: pointer; padding: 0; flex: none; }
.theme-toggle:hover { background: var(--panel-3); }
.theme-toggle svg { width: 20px; height: 20px; }
.theme-toggle .i-sun { display: none; }
.theme-toggle[data-current="dark"] .i-sun { display: block; }
.theme-toggle[data-current="dark"] .i-moon { display: none; }

/* ---------- how-to-use guide under each tool ---------- */
.guide { margin-top: 18px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; }
@media (min-width: 720px) { .guide { padding: 28px; } }
.guide > .section-kicker { margin-top: 0; }
.guide h2 { margin-top: 0; font-size: clamp(1.4rem, 1.15rem + 1vw, 1.9rem); }
.guide-grid { display: grid; gap: 18px; }
@media (min-width: 900px) { .guide-grid { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: start; } }
.guide .steps { margin: 0; }
.guide .steps li { background: var(--bg); }
.controls { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 18px; }
.controls h3 { margin: 0 0 10px; font-size: 1rem; font-family: var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.controls dl { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px 14px; margin: 0; }
.controls dt { font-weight: 700; white-space: nowrap; }
.controls dt .chipname { display: inline-block; font: 700 0.8rem/1 var(--mono); padding: 6px 9px; border-radius: 999px; background: var(--panel-3); border: 1px solid var(--line-strong); }
.controls dd { margin: 0; color: var(--muted); font-size: 0.95rem; line-height: 1.45; }

/* ---------- blog ---------- */
.post-list { list-style: none; padding: 0; display: grid; gap: 14px; margin: 0 0 1em; }
@media (min-width: 760px) { .post-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.post-list li + li { margin: 0; }
.post-list a { display: flex; flex-direction: column; gap: 6px; height: 100%; padding: 20px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--ink); text-decoration: none; transition: border-color .15s, transform .15s; }
.post-list a:hover { border-color: var(--signal); transform: translateY(-2px); color: var(--ink); }
.post-list strong { font-family: var(--display); font-size: 1.3rem; line-height: 1.15; letter-spacing: -0.015em; }
.post-list .meta, .article-meta { font: 600 0.78rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.post-list .excerpt { color: var(--muted); }
.article { max-width: 72ch; }
.article h1 { font-size: clamp(2rem, 1.3rem + 3vw, 3.3rem); }
.article .lede { margin-bottom: 1em; }
.article h2 { font-size: clamp(1.4rem, 1.15rem + 1vw, 1.85rem); }
.article-body img { border-radius: var(--radius-sm); }
.cta { display: flex; flex-wrap: wrap; gap: 14px 20px; align-items: center; justify-content: space-between; margin: 1.8em 0; padding: 20px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.cta p { margin: 0; max-width: 46ch; }
.cta strong { display: block; font-family: var(--display); font-size: 1.2rem; }
table.compare { width: 100%; border-collapse: collapse; margin: 0 0 1.2em; font-size: 0.95rem; }
.table-wrap { overflow-x: auto; margin: 0 0 1.2em; }
table.compare th, table.compare td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.compare th { font: 700 0.75rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.theme-toggle[hidden] { display: none; }
@media (max-width: 859px) {
  .header-tools { display: contents; }
  .theme-toggle { order: 2; }
  .site-nav { order: 3; }
}
.guide-note { margin: 16px 0 0; color: var(--muted); font-size: 0.95rem; }