/* Infinite Concept Universe · Plan 5 design tokens · O004
   Private design source. Public adoption begins in O005. */
.icu-v5 {
  color-scheme: dark;

  /* Typography: no remote font dependency. */
  --font-display: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  --font-body: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --text-2xs: clamp(.72rem, .7rem + .05vw, .78rem);
  --text-xs: clamp(.78rem, .75rem + .08vw, .86rem);
  --text-sm: clamp(.88rem, .84rem + .12vw, .98rem);
  --text-md: clamp(1rem, .96rem + .16vw, 1.1rem);
  --text-lg: clamp(1.14rem, 1.05rem + .35vw, 1.36rem);
  --text-xl: clamp(1.4rem, 1.18rem + .8vw, 1.9rem);
  --text-2xl: clamp(1.85rem, 1.35rem + 1.8vw, 2.85rem);
  --text-3xl: clamp(2.4rem, 1.45rem + 3.5vw, 4.5rem);
  --text-hero: clamp(3rem, 1.35rem + 6vw, 7.5rem);
  --leading-tight: 1.03;
  --leading-title: 1.12;
  --leading-body: 1.62;
  --tracking-tight: -.035em;
  --tracking-wide: .11em;

  /* Spacing and sizing. */
  --sp-1: .25rem;
  --sp-2: .5rem;
  --sp-3: .75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-7: 2rem;
  --sp-8: 2.5rem;
  --sp-9: 3rem;
  --sp-10: 4rem;
  --sp-11: 5rem;
  --sp-12: 7rem;
  --touch: 2.75rem;
  --content: 82rem;
  --content-wide: 96rem;
  --reading: 46rem;
  --measure: 68ch;
  --rail: 18rem;

  /* Geometry. */
  --r-xs: .38rem;
  --r-sm: .62rem;
  --r-md: .9rem;
  --r-lg: 1.35rem;
  --r-xl: 2rem;
  --r-pill: 999px;
  --line: 1px;
  --line-strong: 2px;

  /* Observatory palette. */
  --night-0: #070910;
  --night-1: #0b0f18;
  --night-2: #111827;
  --night-3: #182235;
  --night-4: #24324a;
  --ink: #f7f3e9;
  --ink-soft: #dce3ec;
  --muted: #aeb9ca;
  --quiet: #7f8ba0;
  --line-color: #33435e;
  --line-soft: #26344b;
  --paper: #f2ede2;
  --paper-2: #e7dfd0;
  --paper-ink: #151a24;
  --paper-muted: #5c6470;
  --cyan: #90dcff;
  --cyan-ink: #07131a;
  --violet: #c2adff;
  --violet-ink: #130d27;
  --gold: #f3d58a;
  --gold-ink: #211606;
  --mint: #8ee5bd;
  --mint-ink: #062017;
  --coral: #ffab9c;
  --coral-ink: #2a0c08;
  --red: #ff9099;
  --red-ink: #2b080d;

  /* Semantic surfaces. */
  --page: var(--night-0);
  --surface: var(--night-1);
  --surface-2: var(--night-2);
  --surface-3: var(--night-3);
  --surface-glow: color-mix(in srgb, var(--cyan) 9%, var(--night-2));
  --text: var(--ink);
  --text-muted: var(--muted);
  --border: var(--line-color);
  --border-soft: var(--line-soft);
  --accent: var(--cyan);
  --accent-ink: var(--cyan-ink);
  --focus: #fff2a8;
  --success: var(--mint);
  --warning: var(--gold);
  --danger: var(--red);
  --info: var(--violet);

  /* Family accents. */
  --family-concept: #a9b6cb;
  --family-knowledge: #90dcff;
  --family-product: #f3d58a;
  --family-decision: #ffb990;
  --family-make: #8ee5bd;
  --family-venture: #c2adff;
  --family-tool: #8fd8ef;
  --family-app: #92b8ff;
  --family-game: #ff9ed2;
  --family-reading: #f0d9a7;
  --family-visual: #f0a6ff;
  --family-audio: #9fb4ff;
  --family-download: #8de8cf;
  --family-guided: #ffd28a;
  --family-evidence: #a6c0a7;
  --family-collection: #d4b9ff;

  /* Shadows and depth. */
  --shadow-1: 0 1px 0 rgba(255,255,255,.04), 0 10px 30px rgba(0,0,0,.24);
  --shadow-2: 0 1px 0 rgba(255,255,255,.05), 0 24px 70px rgba(0,0,0,.38);
  --shadow-focus: 0 0 0 3px color-mix(in srgb, var(--focus) 42%, transparent);

  /* Motion. */
  --ease-out: cubic-bezier(.2,.72,.2,1);
  --ease-spring: cubic-bezier(.2,.9,.25,1.08);
  --dur-fast: 120ms;
  --dur-med: 220ms;
  --dur-slow: 420ms;

  /* Visualization. */
  --data-1: #90dcff;
  --data-2: #c2adff;
  --data-3: #f3d58a;
  --data-4: #8ee5bd;
  --data-5: #ff9ed2;
  --data-grid: #31405a;
}

@media (prefers-reduced-motion: reduce) {
  .icu-v5 {
    --dur-fast: 0ms;
    --dur-med: 0ms;
    --dur-slow: 0ms;
  }
}

/* Infinite Concept Universe · Plan 5 component system · O004 */
.icu-v5, .icu-v5 *, .icu-v5 *::before, .icu-v5 *::after { box-sizing: border-box; }
.icu-v5 { margin: 0; background: var(--page); color: var(--text); font-family: var(--font-body); font-size: 100%; line-height: var(--leading-body); text-rendering: optimizeLegibility; }
.icu-v5 :where(img,svg,video,canvas,audio) { max-width: 100%; }
.icu-v5 :where(button,input,select,textarea) { font: inherit; color: inherit; }
.icu-v5 :where(h1,h2,h3,h4,p,ul,ol,figure,blockquote) { margin-block-start: 0; }
.icu-v5 :where(h1,h2,h3,h4,a,p,li,dt,dd,button,.v5-chip,.v5-badge) { overflow-wrap: anywhere; }
.icu-v5 a { color: inherit; text-decoration-thickness: .08em; text-underline-offset: .18em; }
.icu-v5 a:hover { text-decoration-color: var(--accent); }
.icu-v5 :where(a,button,input,select,textarea,summary,[tabindex]):focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; box-shadow: var(--shadow-focus); }
.icu-v5 ::selection { background: var(--gold); color: var(--gold-ink); }
.icu-v5 .v5-sr-only { position: absolute !important; inline-size: 1px !important; block-size: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip-path: inset(50%) !important; white-space: nowrap !important; border: 0 !important; }
.icu-v5 .v5-skip { position: fixed; inset: .75rem auto auto .75rem; transform: translateY(-180%); z-index: 999; min-height: var(--touch); padding: .7rem 1rem; border-radius: var(--r-sm); background: var(--focus); color: #111; font-weight: 800; }
.icu-v5 .v5-skip:focus { transform: translateY(0); }

/* Atmosphere: CSS only, intentionally restrained. */
.icu-v5 .v5-atmosphere { position: relative; isolation: isolate; background:
  radial-gradient(circle at 14% -10%, rgba(144,220,255,.12), transparent 32rem),
  radial-gradient(circle at 86% 4%, rgba(194,173,255,.11), transparent 28rem),
  linear-gradient(180deg,var(--night-0),var(--night-1) 38rem,var(--night-0)); }
.icu-v5 .v5-atmosphere::before { content:""; position:absolute; inset:0; z-index:-1; pointer-events:none; opacity:.16; background-image:radial-gradient(circle,#dce9ff 0 1px,transparent 1.2px); background-size: 29px 29px; mask-image:linear-gradient(to bottom,black,transparent 42rem); }

/* Layout. */
.icu-v5 .v5-wrap { width:min(calc(100% - 2rem),var(--content)); margin-inline:auto; }
.icu-v5 .v5-wrap-wide { width:min(calc(100% - 2rem),var(--content-wide)); margin-inline:auto; }
.icu-v5 .v5-section { padding-block: clamp(2.75rem, 5vw, 6rem); }
.icu-v5 .v5-stack { display:grid; gap:var(--sp-6); }
.icu-v5 .v5-stack-sm { display:grid; gap:var(--sp-3); }
.icu-v5 .v5-cluster { display:flex; flex-wrap:wrap; align-items:center; gap:var(--sp-3); min-width:0; }
.icu-v5 .v5-split { display:grid; grid-template-columns:minmax(0,1.1fr) minmax(16rem,.9fr); gap:clamp(1.5rem,4vw,4rem); align-items:start; }
.icu-v5 .v5-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,17rem),1fr)); gap:var(--sp-5); }
.icu-v5 .v5-grid-wide { display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,22rem),1fr)); gap:var(--sp-6); }
.icu-v5 .v5-reading { width:min(calc(100% - 2rem),var(--reading)); margin-inline:auto; }
.icu-v5 .v5-rule { border:0; border-top:1px solid var(--border-soft); margin-block:var(--sp-8); }

/* Type. */
.icu-v5 .v5-display { font-family:var(--font-display); font-size:var(--text-hero); line-height:var(--leading-tight); letter-spacing:var(--tracking-tight); font-weight:500; text-wrap:balance; }
.icu-v5 .v5-h1 { font-family:var(--font-display); font-size:var(--text-3xl); line-height:var(--leading-tight); letter-spacing:var(--tracking-tight); font-weight:500; text-wrap:balance; }
.icu-v5 .v5-h2 { font-family:var(--font-display); font-size:var(--text-2xl); line-height:var(--leading-title); letter-spacing:-.02em; font-weight:550; text-wrap:balance; }
.icu-v5 .v5-h3 { font-size:var(--text-xl); line-height:1.22; letter-spacing:-.015em; font-weight:720; text-wrap:balance; }
.icu-v5 .v5-kicker { color:var(--accent); font-size:var(--text-xs); line-height:1.3; letter-spacing:var(--tracking-wide); text-transform:uppercase; font-weight:800; }
.icu-v5 .v5-lede { max-width:62ch; color:var(--ink-soft); font-size:var(--text-lg); line-height:1.52; }
.icu-v5 .v5-muted { color:var(--text-muted); }
.icu-v5 .v5-mono { font-family:var(--font-mono); font-size:.92em; }

/* Icon primitive. */
.icu-v5 .v5-icon { inline-size:1.1em; block-size:1.1em; flex:0 0 auto; display:inline-grid; place-items:center; stroke:currentColor; fill:none; stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; }
.icu-v5 .v5-icon[data-size="lg"] { inline-size:1.55rem; block-size:1.55rem; }

/* Buttons / chips / badges. */
.icu-v5 .v5-button { min-height:var(--touch); max-width:100%; display:inline-flex; justify-content:center; align-items:center; gap:.55rem; padding:.68rem 1rem; border:1px solid var(--border); border-radius:var(--r-pill); background:var(--surface-2); color:var(--text); text-decoration:none; font-weight:760; line-height:1.2; cursor:pointer; transition:transform var(--dur-fast) var(--ease-out),border-color var(--dur-fast) var(--ease-out),background var(--dur-fast) var(--ease-out); }
.icu-v5 .v5-button:hover { border-color:#607392; background:var(--surface-3); }
.icu-v5 .v5-button:active { transform:translateY(1px); }
.icu-v5 .v5-button[data-tone="primary"] { background:var(--accent); color:var(--accent-ink); border-color:var(--accent); }
.icu-v5 .v5-button[data-tone="paper"] { background:var(--paper); color:var(--paper-ink); border-color:var(--paper); }
.icu-v5 .v5-button[disabled],.icu-v5 .v5-button[aria-disabled="true"] { opacity:.48; cursor:not-allowed; transform:none; }
.icu-v5 .v5-chip,.icu-v5 .v5-badge { display:inline-flex; align-items:center; gap:.4rem; max-width:100%; min-height:1.9rem; padding:.32rem .62rem; border-radius:var(--r-pill); border:1px solid var(--border); background:var(--surface-2); color:var(--ink-soft); font-size:var(--text-xs); line-height:1.2; font-weight:720; }
.icu-v5 .v5-badge[data-tone="success"] { color:var(--success); border-color:color-mix(in srgb,var(--success) 55%,var(--border)); }
.icu-v5 .v5-badge[data-tone="warning"] { color:var(--warning); border-color:color-mix(in srgb,var(--warning) 55%,var(--border)); }
.icu-v5 .v5-badge[data-tone="danger"] { color:var(--danger); border-color:color-mix(in srgb,var(--danger) 55%,var(--border)); }
.icu-v5 .v5-badge[data-tone="info"] { color:var(--info); border-color:color-mix(in srgb,var(--info) 55%,var(--border)); }

/* Resource shells. */
.icu-v5 .v5-card { --family:var(--family-concept); min-width:0; position:relative; display:flex; flex-direction:column; border:1px solid var(--border-soft); border-radius:var(--r-lg); background:linear-gradient(180deg,color-mix(in srgb,var(--family) 5%,var(--surface-2)),var(--surface)); box-shadow:var(--shadow-1); overflow:hidden; }
.icu-v5 .v5-card::before { content:""; block-size:3px; background:var(--family); }
.icu-v5 .v5-card[data-family="knowledge"]{--family:var(--family-knowledge)}
.icu-v5 .v5-card[data-family="product"]{--family:var(--family-product)}
.icu-v5 .v5-card[data-family="decision"]{--family:var(--family-decision)}
.icu-v5 .v5-card[data-family="make"]{--family:var(--family-make)}
.icu-v5 .v5-card[data-family="venture"]{--family:var(--family-venture)}
.icu-v5 .v5-card[data-family="tool"]{--family:var(--family-tool)}
.icu-v5 .v5-card[data-family="app"]{--family:var(--family-app)}
.icu-v5 .v5-card[data-family="game"]{--family:var(--family-game)}
.icu-v5 .v5-card[data-family="reading"]{--family:var(--family-reading)}
.icu-v5 .v5-card[data-family="visual"]{--family:var(--family-visual)}
.icu-v5 .v5-card[data-family="audio"]{--family:var(--family-audio)}
.icu-v5 .v5-card[data-family="download"]{--family:var(--family-download)}
.icu-v5 .v5-card[data-family="guided"]{--family:var(--family-guided)}
.icu-v5 .v5-card[data-family="evidence"]{--family:var(--family-evidence)}
.icu-v5 .v5-card[data-family="collection"]{--family:var(--family-collection)}
.icu-v5 .v5-card__art { aspect-ratio:16/8.5; display:grid; place-items:end start; padding:var(--sp-5); background:
  linear-gradient(135deg,color-mix(in srgb,var(--family) 26%,transparent),transparent 55%),
  radial-gradient(circle at 78% 24%,color-mix(in srgb,var(--family) 18%,transparent),transparent 34%),
  var(--surface-3); border-bottom:1px solid var(--border-soft); }
.icu-v5 .v5-card__art[data-empty="true"] { aspect-ratio:16/5.5; }
.icu-v5 .v5-card__art-mark { inline-size:2.6rem; block-size:2.6rem; display:grid; place-items:center; border:1px solid color-mix(in srgb,var(--family) 70%,var(--border)); border-radius:50%; color:var(--family); background:rgba(7,9,16,.45); }
.icu-v5 .v5-card__body { min-width:0; display:grid; gap:var(--sp-4); padding:var(--sp-6); flex:1; }
.icu-v5 .v5-card__title { margin:0; font-size:var(--text-xl); line-height:1.2; letter-spacing:-.02em; }
.icu-v5 .v5-card__title a { text-decoration:none; }
.icu-v5 .v5-card__title a:hover { text-decoration:underline; text-decoration-color:var(--family); }
.icu-v5 .v5-card__summary { margin:0; color:var(--text-muted); }
.icu-v5 .v5-card__meta { display:flex; flex-wrap:wrap; gap:.35rem .85rem; color:var(--text-muted); font-size:var(--text-sm); }
.icu-v5 .v5-card__footer { display:flex; flex-wrap:wrap; justify-content:space-between; gap:var(--sp-3); align-items:center; margin-top:auto; padding-top:var(--sp-2); }
.icu-v5 .v5-card__footer > * { min-width:0; }

/* Topic card. */
.icu-v5 .v5-topic { min-width:0; display:grid; gap:var(--sp-5); padding:var(--sp-6); border:1px solid var(--border-soft); border-radius:var(--r-xl); background:var(--surface); position:relative; overflow:hidden; }
.icu-v5 .v5-topic::after { content:""; position:absolute; inline-size:9rem; block-size:9rem; border-radius:50%; inset:-4rem -3rem auto auto; background:radial-gradient(circle,color-mix(in srgb,var(--accent) 28%,transparent),transparent 68%); pointer-events:none; }
.icu-v5 .v5-topic__count { font-family:var(--font-mono); color:var(--text-muted); font-size:var(--text-xs); }

/* Evidence / freshness. */
.icu-v5 .v5-evidence { display:grid; gap:var(--sp-3); padding:var(--sp-4); border:1px solid var(--border-soft); border-radius:var(--r-md); background:rgba(7,9,16,.32); }
.icu-v5 .v5-evidence__row { display:flex; gap:var(--sp-3); align-items:flex-start; }
.icu-v5 .v5-evidence__label { font-weight:780; }
.icu-v5 .v5-evidence__detail { color:var(--text-muted); font-size:var(--text-sm); }
.icu-v5 .v5-freshness[data-state="fresh"]{--state:var(--success)}
.icu-v5 .v5-freshness[data-state="review"]{--state:var(--warning)}
.icu-v5 .v5-freshness[data-state="stale"]{--state:var(--danger)}
.icu-v5 .v5-freshness { display:inline-flex; align-items:center; gap:.45rem; color:var(--state,var(--text-muted)); font-size:var(--text-xs); font-weight:760; }

/* Product / comparison. */
.icu-v5 .v5-product { display:grid; grid-template-columns:minmax(0,1fr) minmax(15rem,.58fr); gap:var(--sp-6); padding:var(--sp-6); border:1px solid var(--border-soft); border-radius:var(--r-xl); background:var(--surface); }
.icu-v5 .v5-price { font-family:var(--font-display); font-size:var(--text-2xl); line-height:1; }
.icu-v5 .v5-commerce { display:grid; gap:var(--sp-4); align-content:start; padding:var(--sp-5); border-radius:var(--r-lg); background:var(--paper); color:var(--paper-ink); }
.icu-v5 .v5-commerce .v5-muted { color:var(--paper-muted); }
.icu-v5 .v5-disclosure { font-size:var(--text-xs); line-height:1.5; color:var(--paper-muted); }
.icu-v5 .v5-compare { overflow:auto; border:1px solid var(--border-soft); border-radius:var(--r-lg); }
.icu-v5 .v5-compare table { width:100%; min-width:42rem; border-collapse:collapse; background:var(--surface); }
.icu-v5 .v5-compare th,.icu-v5 .v5-compare td { padding:var(--sp-4); text-align:left; vertical-align:top; border-bottom:1px solid var(--border-soft); }
.icu-v5 .v5-compare th { color:var(--ink-soft); background:var(--surface-2); font-size:var(--text-sm); }
.icu-v5 .v5-compare caption { text-align:left; padding:var(--sp-4); color:var(--text-muted); }

/* Guide / make / venture. */
.icu-v5 .v5-guide { display:grid; grid-template-columns:minmax(12rem,var(--rail)) minmax(0,1fr); gap:clamp(1.5rem,4vw,4rem); align-items:start; }
.icu-v5 .v5-guide__rail { position:sticky; top:1rem; display:grid; gap:var(--sp-3); padding:var(--sp-4); border:1px solid var(--border-soft); border-radius:var(--r-lg); background:var(--surface); }
.icu-v5 .v5-guide__rail a { min-height:var(--touch); display:flex; align-items:center; padding:.4rem .55rem; border-radius:var(--r-sm); text-decoration:none; color:var(--text-muted); }
.icu-v5 .v5-guide__rail a[aria-current="true"] { color:var(--text); background:var(--surface-3); }
.icu-v5 .v5-step { display:grid; grid-template-columns:2.4rem minmax(0,1fr); gap:var(--sp-4); padding-block:var(--sp-5); border-top:1px solid var(--border-soft); }
.icu-v5 .v5-step__n { inline-size:2.2rem; block-size:2.2rem; display:grid; place-items:center; border-radius:50%; background:var(--success); color:var(--mint-ink); font-weight:900; }
.icu-v5 .v5-supply { display:flex; flex-wrap:wrap; gap:.5rem; padding:.8rem; border:1px solid var(--border-soft); border-radius:var(--r-md); background:var(--surface-2); }

/* Tools and apps. */
.icu-v5 .v5-tool { display:grid; grid-template-columns:minmax(0,.78fr) minmax(18rem,1.22fr); gap:var(--sp-6); padding:var(--sp-6); border:1px solid var(--border-soft); border-radius:var(--r-xl); background:linear-gradient(145deg,var(--surface),var(--surface-glow)); }
.icu-v5 .v5-field { display:grid; gap:.45rem; min-width:0; }
.icu-v5 .v5-field label { font-size:var(--text-sm); font-weight:780; }
.icu-v5 :where(input[type="text"],input[type="search"],input[type="number"],select,textarea) { width:100%; min-width:0; min-height:var(--touch); padding:.72rem .8rem; border:1px solid var(--border); border-radius:var(--r-sm); background:var(--night-0); color:var(--text); }
.icu-v5 input::placeholder,.icu-v5 textarea::placeholder { color:var(--quiet); opacity:1; }
.icu-v5 .v5-result { min-width:0; display:grid; place-items:center; text-align:center; padding:var(--sp-7); border:1px solid color-mix(in srgb,var(--family-tool) 50%,var(--border)); border-radius:var(--r-lg); background:color-mix(in srgb,var(--family-tool) 7%,var(--night-0)); }
.icu-v5 .v5-result strong { font-family:var(--font-display); font-size:var(--text-3xl); line-height:1; }

/* Game / media / reading. */
.icu-v5 .v5-game { display:grid; gap:var(--sp-5); padding:var(--sp-6); border:1px solid var(--border-soft); border-radius:var(--r-xl); background:linear-gradient(145deg,color-mix(in srgb,var(--family-game) 12%,var(--surface)),var(--surface)); }
.icu-v5 .v5-game__stage { min-height:18rem; display:grid; place-items:center; border:1px solid color-mix(in srgb,var(--family-game) 46%,var(--border)); border-radius:var(--r-lg); background:radial-gradient(circle at center,color-mix(in srgb,var(--family-game) 14%,var(--night-0)),var(--night-0) 62%); }
.icu-v5 .v5-reading-paper { background:var(--paper); color:var(--paper-ink); border-radius:var(--r-xl); padding:clamp(1.4rem,4vw,3.5rem); box-shadow:var(--shadow-2); }
.icu-v5 .v5-reading-paper :where(p,li){ max-width:68ch; }
.icu-v5 .v5-reading-paper .v5-kicker { color:#6b4b11; }
.icu-v5 .v5-reading-paper .v5-muted { color:var(--paper-muted); }
.icu-v5 .v5-media { display:grid; grid-template-columns:minmax(0,1.1fr) minmax(14rem,.9fr); border:1px solid var(--border-soft); border-radius:var(--r-xl); overflow:hidden; background:var(--surface); }
.icu-v5 .v5-media__frame { min-height:17rem; display:grid; place-items:center; background:linear-gradient(135deg,#221429,#10192b 60%,#12262c); }
.icu-v5 .v5-media__body { padding:var(--sp-6); }

/* Download / commerce. */
.icu-v5 .v5-download { display:grid; grid-template-columns:auto minmax(0,1fr) auto; gap:var(--sp-4); align-items:center; padding:var(--sp-5); border:1px solid var(--border-soft); border-radius:var(--r-lg); background:var(--surface); }
.icu-v5 .v5-download__icon { inline-size:3rem; block-size:3rem; display:grid; place-items:center; border-radius:var(--r-md); background:color-mix(in srgb,var(--family-download) 13%,var(--surface-2)); color:var(--family-download); }
.icu-v5 .v5-shop-module { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:var(--sp-5); align-items:center; padding:var(--sp-6); border:1px solid color-mix(in srgb,var(--gold) 35%,var(--border)); border-radius:var(--r-xl); background:linear-gradient(110deg,color-mix(in srgb,var(--gold) 7%,var(--surface)),var(--surface)); }

/* Empty and state shells. */
.icu-v5 .v5-empty { display:grid; justify-items:start; gap:var(--sp-4); padding:clamp(1.4rem,4vw,2.7rem); border:1px dashed #52627c; border-radius:var(--r-xl); background:linear-gradient(135deg,rgba(144,220,255,.045),transparent 56%); }
.icu-v5 .v5-empty__glyph { inline-size:3.4rem; block-size:3.4rem; display:grid; place-items:center; border-radius:50%; border:1px solid var(--border); color:var(--text-muted); }
.icu-v5 .v5-notice { display:grid; grid-template-columns:auto minmax(0,1fr); gap:var(--sp-3); padding:var(--sp-4); border:1px solid var(--border); border-radius:var(--r-md); background:var(--surface-2); }
.icu-v5 .v5-notice[data-tone="warning"] { border-color:color-mix(in srgb,var(--warning) 52%,var(--border)); }
.icu-v5 .v5-notice[data-tone="danger"] { border-color:color-mix(in srgb,var(--danger) 52%,var(--border)); }

/* Data visualization. */
.icu-v5 .v5-stats { display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,10rem),1fr)); border:1px solid var(--border-soft); border-radius:var(--r-lg); overflow:hidden; }
.icu-v5 .v5-stat { min-width:0; display:grid; gap:.25rem; padding:var(--sp-5); background:var(--surface); border-right:1px solid var(--border-soft); }
.icu-v5 .v5-stat:last-child { border-right:0; }
.icu-v5 .v5-stat strong { font-family:var(--font-display); font-size:var(--text-2xl); line-height:1.1; }
.icu-v5 .v5-bars { display:grid; gap:.7rem; }
.icu-v5 .v5-bar { display:grid; grid-template-columns:minmax(6rem,.35fr) minmax(0,1fr) auto; gap:.75rem; align-items:center; font-size:var(--text-sm); }
.icu-v5 .v5-bar__track { block-size:.65rem; border-radius:var(--r-pill); background:var(--surface-3); overflow:hidden; }
.icu-v5 .v5-bar__fill { block-size:100%; inline-size:var(--value,50%); background:var(--data-color,var(--data-1)); border-radius:inherit; }

/* Illustration framing. */
.icu-v5 .v5-frame { position:relative; padding:.55rem; border:1px solid var(--border); border-radius:var(--r-lg); background:linear-gradient(145deg,var(--surface-3),var(--surface)); }
.icu-v5 .v5-frame::before,.icu-v5 .v5-frame::after { content:""; position:absolute; pointer-events:none; inline-size:1.4rem; block-size:1.4rem; border-color:var(--accent); opacity:.65; }
.icu-v5 .v5-frame::before { inset:.3rem auto auto .3rem; border-top:1px solid; border-left:1px solid; }
.icu-v5 .v5-frame::after { inset:auto .3rem .3rem auto; border-right:1px solid; border-bottom:1px solid; }
.icu-v5 .v5-frame__canvas { min-height:14rem; display:grid; place-items:center; border-radius:calc(var(--r-lg) - .35rem); background:
 radial-gradient(circle at 35% 26%,rgba(144,220,255,.17),transparent 24%),
 radial-gradient(circle at 74% 64%,rgba(194,173,255,.16),transparent 28%),
 linear-gradient(150deg,#0b1220,#151226 58%,#0b1a21); }

@media (max-width: 54rem) {
  .icu-v5 .v5-split,.icu-v5 .v5-product,.icu-v5 .v5-tool,.icu-v5 .v5-media,.icu-v5 .v5-guide { grid-template-columns:1fr; }
  .icu-v5 .v5-guide__rail { position:static; }
}
@media (max-width: 36rem) {
  .icu-v5 .v5-wrap,.icu-v5 .v5-wrap-wide,.icu-v5 .v5-reading { width:min(calc(100% - 1.25rem),var(--content)); }
  .icu-v5 .v5-card__body,.icu-v5 .v5-product,.icu-v5 .v5-tool,.icu-v5 .v5-game,.icu-v5 .v5-media__body { padding:var(--sp-5); }
  .icu-v5 .v5-download { grid-template-columns:auto minmax(0,1fr); }
  .icu-v5 .v5-download > .v5-button { grid-column:1/-1; width:100%; }
  .icu-v5 .v5-shop-module { grid-template-columns:1fr; }
  .icu-v5 .v5-stat { border-right:0; border-bottom:1px solid var(--border-soft); }
  .icu-v5 .v5-stat:last-child { border-bottom:0; }
  .icu-v5 .v5-bar { grid-template-columns:1fr auto; }
  .icu-v5 .v5-bar__track { grid-column:1/-1; grid-row:2; }
}
@media (prefers-reduced-motion: reduce) {
  .icu-v5 *, .icu-v5 *::before, .icu-v5 *::after { scroll-behavior:auto !important; animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:0ms !important; }
  .icu-v5 .v5-button:active { transform:none; }
}
/* Enlarged-text hardening: grid/flex children may not impose min-content width. */
.icu-v5 :where(strong,small,span){overflow-wrap:anywhere}
.icu-v5 :where(.v5-split,.v5-grid,.v5-grid-wide,.v5-product,.v5-tool,.v5-media,.v5-download,.v5-shop-module,.v5-guide) > *{min-width:0;max-width:100%}
.icu-v5 .v5-download > div:nth-child(2){min-width:0}


/* Infinite Concept Universe · Plan 5 O005 public shell and homepage */
.icu-v5 { min-height:100%; }
.icu-v5 body { min-height:100%; }
body.icu-v5 { min-height:100vh; min-width:0!important; width:100%; max-width:100%; overflow-x:clip; background:var(--night-0); }
.icu-v5 .v5-wrap,.icu-v5 .v5-wrap-wide,.icu-v5 .v5-reading { max-width:calc(100vw - 20px)!important; }
body.icu-v5::before { content:""; position:fixed; inset:0; pointer-events:none; z-index:-3; background:radial-gradient(circle at 12% -8%,rgba(144,220,255,.08),transparent 31rem),radial-gradient(circle at 88% 3%,rgba(194,173,255,.07),transparent 30rem),var(--night-0); }
body.icu-v5::after { content:""; position:fixed; inset:0; pointer-events:none; z-index:-2; opacity:.11; background-image:radial-gradient(circle,#dce9ff 0 1px,transparent 1.15px); background-size:31px 31px; mask-image:linear-gradient(to bottom,black,transparent 46rem); }

/* Public shell */
.icu-v5 .v5-public-header { position:sticky; top:0; z-index:120; border-bottom:1px solid rgba(92,112,145,.38); background:rgba(7,9,16,.93); backdrop-filter:blur(16px) saturate(125%); }
.icu-v5 .v5-header-row { min-height:4.65rem; display:flex; align-items:center; gap:clamp(.65rem,2vw,1.4rem); }
.icu-v5 .v5-public-brand { min-width:0; display:flex; align-items:center; gap:.72rem; margin-right:auto; text-decoration:none; }
.icu-v5 .v5-public-brand:hover .v5-brand-name { text-decoration:underline; text-decoration-color:var(--cyan); }
.icu-v5 .v5-brand-mark { inline-size:2.45rem; block-size:2.45rem; flex:0 0 auto; display:grid; place-items:center; border:1px solid #47607d; border-radius:50%; background:radial-gradient(circle at 40% 32%,rgba(144,220,255,.18),rgba(12,17,28,.92) 60%); box-shadow:inset 0 0 0 3px rgba(7,9,16,.68); }
.icu-v5 .v5-brand-mark img { inline-size:1.65rem; block-size:1.65rem; }
.icu-v5 .v5-brand-copy { min-width:0; display:grid; line-height:1.08; }
.icu-v5 .v5-brand-name { font-size:.83rem; font-weight:860; letter-spacing:.075em; text-transform:uppercase; white-space:nowrap; }
.icu-v5 .v5-brand-sub { margin-top:.24rem; color:var(--quiet); font-size:.72rem; letter-spacing:.03em; white-space:nowrap; }
.icu-v5 .v5-primary-nav { display:flex; align-items:center; gap:.15rem; }
.icu-v5 .v5-primary-nav a { min-height:var(--touch); display:flex; align-items:center; padding:.45rem .7rem; border-radius:var(--r-pill); color:var(--muted); text-decoration:none; font-size:.9rem; font-weight:720; }
.icu-v5 .v5-primary-nav a:hover,.icu-v5 .v5-primary-nav a[aria-current="page"] { color:var(--ink); background:var(--surface-2); }
.icu-v5 .v5-header-actions { display:flex; align-items:center; gap:.35rem; }
.icu-v5 .v5-shell-action { min-height:var(--touch); min-width:var(--touch); display:inline-flex; align-items:center; justify-content:center; gap:.48rem; padding:.55rem .72rem; border:1px solid transparent; border-radius:var(--r-pill); background:transparent; color:var(--ink-soft); text-decoration:none; font-weight:760; cursor:pointer; }
.icu-v5 .v5-shell-action:hover { background:var(--surface-2); border-color:var(--border-soft); }
.icu-v5 .v5-shell-action[data-tone="universe"] { border-color:#40516d; background:rgba(17,24,39,.72); }
.icu-v5 .v5-shell-icon { inline-size:1.18rem; block-size:1.18rem; flex:0 0 auto; }
.icu-v5 .v5-menu-dialog { width:min(52rem,calc(100% - 1rem)); max-height:calc(100dvh - 1rem); margin:auto; padding:0; border:1px solid #43536c; border-radius:1.35rem; background:#0b0f18; color:var(--ink); box-shadow:0 32px 100px rgba(0,0,0,.58); overflow:auto; }
.icu-v5 .v5-menu-dialog::backdrop { background:rgba(2,5,10,.72); backdrop-filter:blur(5px); }
.icu-v5 .v5-menu-card { padding:clamp(1rem,3vw,2rem); }
.icu-v5 .v5-menu-head { display:flex; align-items:flex-start; justify-content:space-between; gap:1rem; padding-bottom:1.15rem; border-bottom:1px solid var(--border-soft); }
.icu-v5 .v5-menu-head h2 { margin:.18rem 0 0; font-family:var(--font-display); font-size:var(--text-2xl); font-weight:520; line-height:1.05; }
.icu-v5 .v5-menu-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:1rem; padding-top:1.2rem; }
.icu-v5 .v5-menu-group { min-width:0; padding:1rem; border:1px solid var(--border-soft); border-radius:var(--r-lg); background:var(--surface); }
.icu-v5 .v5-menu-group h3 { margin:0 0 .6rem; color:var(--cyan); font-size:.73rem; letter-spacing:.1em; text-transform:uppercase; }
.icu-v5 .v5-menu-group nav { display:grid; gap:.18rem; }
.icu-v5 .v5-menu-group a { min-height:2.7rem; display:grid; align-content:center; gap:.08rem; padding:.48rem .55rem; border-radius:.55rem; text-decoration:none; }
.icu-v5 .v5-menu-group a:hover,.icu-v5 .v5-menu-group a[aria-current="page"] { background:var(--surface-3); }
.icu-v5 .v5-menu-group a strong { line-height:1.2; }
.icu-v5 .v5-menu-group a small { color:var(--quiet); line-height:1.35; }
.icu-v5 .v5-menu-note { margin:1rem 0 0; color:var(--quiet); font-size:.78rem; }

/* Public footer */
.icu-v5 .v5-public-footer { margin-top:clamp(3rem,8vw,7rem); border-top:1px solid var(--border-soft); background:#080b12; }
.icu-v5 .v5-footer-grid { display:grid; grid-template-columns:minmax(15rem,1.2fr) repeat(3,minmax(9rem,.62fr)); gap:clamp(1.4rem,4vw,3.5rem); padding-block:clamp(2.5rem,5vw,4.5rem); }
.icu-v5 .v5-footer-intro { max-width:34rem; }
.icu-v5 .v5-footer-intro strong { font-family:var(--font-display); font-size:var(--text-xl); font-weight:520; }
.icu-v5 .v5-footer-intro p { color:var(--muted); max-width:38ch; }
.icu-v5 .v5-footer-nav { display:grid; align-content:start; gap:.45rem; }
.icu-v5 .v5-footer-nav > strong { margin-bottom:.25rem; color:var(--ink-soft); font-size:.76rem; text-transform:uppercase; letter-spacing:.1em; }
.icu-v5 .v5-footer-nav a { color:var(--muted); text-decoration:none; }
.icu-v5 .v5-footer-nav a:hover { color:var(--ink); text-decoration:underline; }
.icu-v5 .v5-footer-boundary { display:flex; flex-wrap:wrap; justify-content:space-between; gap:1rem; padding-block:1rem 1.35rem; border-top:1px solid var(--border-soft); color:var(--quiet); font-size:.78rem; }
.icu-v5 .v5-footer-boundary span { max-width:62ch; }

/* O005 homepage */
.icu-v5 .o005-main { overflow:hidden; }
.icu-v5 .o005-hero { position:relative; padding-block:clamp(4rem,9vw,9rem) clamp(3rem,7vw,6.5rem); border-bottom:1px solid var(--border-soft); }
.icu-v5 .o005-hero-grid { display:grid; grid-template-columns:minmax(0,1.1fr) minmax(20rem,.72fr); gap:clamp(2rem,6vw,6rem); align-items:center; }
.icu-v5 .o005-hero-copy { min-width:0; width:100%; max-width:100%; }
.icu-v5 .o005-hero-grid > *,.icu-v5 .o005-section-head > *,.icu-v5 .o005-legacy-panel > *,.icu-v5 .o005-final-grid > * { min-width:0; max-width:100%; }
.icu-v5 .o005-search-box,.icu-v5 .o005-status-strip,.icu-v5 .o005-hero-actions { max-width:100%; }
.icu-v5 .o005-hero h1 { max-width:10ch; margin:.7rem 0 1.2rem; font-family:var(--font-display); font-size:clamp(3.55rem,2rem + 6.2vw,8.2rem); line-height:.92; letter-spacing:-.055em; font-weight:500; text-wrap:balance; }
.icu-v5 .o005-hero h1 em { color:var(--cyan); font-style:normal; }
.icu-v5 .o005-hero .v5-lede { max-width:57ch; }
.icu-v5 .o005-hero-actions { display:flex; flex-wrap:wrap; gap:.7rem; margin-top:1.7rem; }
.icu-v5 .o005-search-box { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:.55rem; max-width:44rem; margin-top:1.5rem; padding:.45rem; border:1px solid #425570; border-radius:var(--r-pill); background:rgba(10,15,25,.84); }
.icu-v5 .o005-search-box input { border:0; background:transparent; min-height:2.7rem; padding-inline:.75rem; }
.icu-v5 .o005-search-box input:focus { outline:none; box-shadow:none; }
.icu-v5 .o005-search-box:focus-within { outline:3px solid var(--focus); outline-offset:3px; }
.icu-v5 .o005-search-box button { border:0; }
.icu-v5 .o005-orbit { position:relative; aspect-ratio:1; min-height:23rem; display:grid; place-items:center; }
.icu-v5 .o005-orbit::before,.icu-v5 .o005-orbit::after { content:""; position:absolute; border:1px solid rgba(144,220,255,.23); border-radius:50%; }
.icu-v5 .o005-orbit::before { inset:9%; }
.icu-v5 .o005-orbit::after { inset:24%; border-color:rgba(194,173,255,.24); }
.icu-v5 .o005-orbit-center { inline-size:9rem; block-size:9rem; position:relative; z-index:2; display:grid; place-items:center; text-align:center; border:1px solid #586b86; border-radius:50%; background:radial-gradient(circle at 40% 30%,rgba(144,220,255,.14),#0c111c 62%); box-shadow:0 0 70px rgba(144,220,255,.08); }
.icu-v5 .o005-orbit-center strong { font-family:var(--font-display); font-size:1.45rem; font-weight:540; line-height:1; }
.icu-v5 .o005-orbit-label { position:absolute; z-index:3; min-height:2.2rem; display:flex; align-items:center; padding:.35rem .65rem; border:1px solid #3a4b66; border-radius:var(--r-pill); background:#0b101a; color:var(--ink-soft); font-size:.76rem; font-weight:750; box-shadow:var(--shadow-1); }
.icu-v5 .o005-orbit-label:nth-of-type(1){top:2%;left:43%}.icu-v5 .o005-orbit-label:nth-of-type(2){top:22%;right:1%}.icu-v5 .o005-orbit-label:nth-of-type(3){bottom:20%;right:4%}.icu-v5 .o005-orbit-label:nth-of-type(4){bottom:2%;left:39%}.icu-v5 .o005-orbit-label:nth-of-type(5){bottom:23%;left:1%}.icu-v5 .o005-orbit-label:nth-of-type(6){top:21%;left:0%}
.icu-v5 .o005-status-strip { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); margin-top:2rem; border:1px solid var(--border-soft); border-radius:var(--r-lg); overflow:hidden; background:rgba(11,15,24,.74); }
.icu-v5 .o005-status { min-width:0; padding:1rem 1.1rem; border-right:1px solid var(--border-soft); }
.icu-v5 .o005-status:last-child { border-right:0; }
.icu-v5 .o005-status strong { display:block; font-family:var(--font-display); font-size:clamp(1.5rem,1.1rem + 1.4vw,2.25rem); line-height:1; font-weight:520; }
.icu-v5 .o005-status span { display:block; margin-top:.35rem; color:var(--quiet); font-size:.76rem; line-height:1.35; }

.icu-v5 .o005-section { padding-block:clamp(3.4rem,7vw,7rem); }
.icu-v5 .o005-section + .o005-section { border-top:1px solid rgba(51,67,94,.55); }
.icu-v5 .o005-section-head { display:grid; grid-template-columns:minmax(0,1fr) minmax(16rem,.52fr); gap:clamp(1rem,4vw,3rem); align-items:end; margin-bottom:clamp(1.6rem,4vw,3rem); }
.icu-v5 .o005-section-head h2 { max-width:16ch; margin:.35rem 0 0; font-family:var(--font-display); font-size:var(--text-3xl); line-height:.98; letter-spacing:-.04em; font-weight:520; }
.icu-v5 .o005-section-head p { margin:0; color:var(--muted); }
.icu-v5 .o005-entry-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:1rem; }
.icu-v5 .o005-entry { --door:var(--cyan); min-width:0; min-height:13.5rem; position:relative; display:flex; flex-direction:column; gap:.8rem; padding:1.2rem; border:1px solid var(--border-soft); border-radius:var(--r-lg); background:linear-gradient(155deg,color-mix(in srgb,var(--door) 8%,var(--surface-2)),var(--surface)); text-decoration:none; overflow:hidden; }
.icu-v5 .o005-entry::before { content:""; position:absolute; inset:0 0 auto; height:2px; background:var(--door); }
.icu-v5 .o005-entry:hover { border-color:color-mix(in srgb,var(--door) 50%,var(--border)); transform:translateY(-1px); }
.icu-v5 .o005-entry[data-door="make"]{--door:var(--mint)}.icu-v5 .o005-entry[data-door="start"]{--door:var(--violet)}.icu-v5 .o005-entry[data-door="read"]{--door:var(--family-reading)}.icu-v5 .o005-entry[data-door="play"]{--door:var(--family-game)}.icu-v5 .o005-entry[data-door="tools"]{--door:var(--family-tool)}.icu-v5 .o005-entry[data-door="download"]{--door:var(--family-download)}.icu-v5 .o005-entry[data-door="product"]{--door:var(--gold)}
.icu-v5 .o005-entry-index { color:var(--door); font-family:var(--font-mono); font-size:.72rem; }
.icu-v5 .o005-entry h3 { margin:auto 0 0; font-family:var(--font-display); font-size:1.55rem; line-height:1.05; font-weight:530; }
.icu-v5 .o005-entry p { margin:0; color:var(--muted); font-size:.88rem; line-height:1.45; }
.icu-v5 .o005-entry-arrow { color:var(--door); font-weight:850; }

.icu-v5 .o005-topic-cloud { display:flex; flex-wrap:wrap; gap:.6rem; }
.icu-v5 .o005-topic { min-height:var(--touch); display:inline-flex; align-items:center; gap:.5rem; padding:.55rem .8rem; border:1px solid var(--border); border-radius:var(--r-pill); background:var(--surface); color:var(--ink-soft); text-decoration:none; }
.icu-v5 .o005-topic:hover { background:var(--surface-3); border-color:#627695; }
.icu-v5 .o005-topic::before { content:""; inline-size:.4rem; block-size:.4rem; border-radius:50%; background:var(--cyan); box-shadow:0 0 0 4px rgba(144,220,255,.07); }

.icu-v5 .o005-library-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:1rem; }
.icu-v5 .o005-library-card { min-width:0; display:grid; grid-template-columns:minmax(0,1fr); gap:.8rem; min-height:11rem; padding:1.15rem; border:1px solid var(--border-soft); border-radius:var(--r-lg); background:var(--surface); }
.icu-v5 .o005-library-card h3 { margin:0; font-size:1.1rem; }
.icu-v5 .o005-library-card p { margin:0; color:var(--muted); font-size:.86rem; line-height:1.5; }
.icu-v5 .o005-library-card .o005-zero { width:max-content; max-width:100%; margin-top:auto; padding:.3rem .52rem; border:1px solid #51617a; border-radius:var(--r-pill); color:var(--quiet); font-family:var(--font-mono); font-size:.7rem; }
.icu-v5 .o005-library-card a { width:max-content; max-width:100%; font-weight:760; }

.icu-v5 .o005-legacy-panel { display:grid; grid-template-columns:minmax(16rem,.45fr) minmax(0,1fr); gap:clamp(1.5rem,5vw,4.5rem); padding:clamp(1.4rem,4vw,3rem); border:1px solid var(--border-soft); border-radius:var(--r-xl); background:linear-gradient(145deg,#0d111a,#101725); }
.icu-v5 .o005-legacy-intro h2 { margin:.35rem 0 1rem; font-family:var(--font-display); font-size:var(--text-2xl); line-height:1; font-weight:520; }
.icu-v5 .o005-legacy-intro p { color:var(--muted); }
.icu-v5 .o005-legacy-stats { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:.6rem; margin:1.2rem 0; }
.icu-v5 .o005-legacy-stats div { padding:.75rem; border:1px solid var(--border-soft); border-radius:var(--r-md); }
.icu-v5 .o005-legacy-stats strong { display:block; font-family:var(--font-display); font-size:1.45rem; font-weight:520; }
.icu-v5 .o005-legacy-stats span { color:var(--quiet); font-size:.72rem; }
.icu-v5 .o005-legacy-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:.75rem; }
.icu-v5 .o005-legacy-card { min-width:0; display:grid; grid-template-columns:minmax(0,1fr); gap:.55rem; padding:1rem; border:1px solid var(--border-soft); border-radius:var(--r-md); background:#0b1019; }
.icu-v5 .o005-legacy-card .meta { display:flex; flex-wrap:wrap; gap:.35rem .6rem; color:var(--quiet); font-size:.7rem; }
.icu-v5 .o005-legacy-card h3 { margin:0; font-size:1rem; line-height:1.2; }
.icu-v5 .o005-legacy-card a { text-decoration:none; }
.icu-v5 .o005-legacy-card a:hover { text-decoration:underline; }
.icu-v5 .o005-legacy-card p { margin:0; color:var(--muted); font-size:.78rem; line-height:1.45; }

.icu-v5 .o005-final-grid { display:grid; grid-template-columns:minmax(0,1.1fr) minmax(16rem,.72fr); gap:1rem; }
.icu-v5 .o005-serendipity { position:relative; min-width:0; min-height:20rem; display:grid; grid-template-columns:minmax(0,1fr); align-content:end; gap:1rem; padding:clamp(1.4rem,4vw,2.5rem); border:1px solid var(--border-soft); border-radius:var(--r-xl); background:radial-gradient(circle at 72% 18%,rgba(194,173,255,.16),transparent 12rem),radial-gradient(circle at 34% 34%,rgba(144,220,255,.09),transparent 14rem),#0b101a; overflow:hidden; }
.icu-v5 .o005-serendipity::before { content:"∞"; position:absolute; top:-2rem; right:1rem; color:rgba(242,237,226,.05); font-family:var(--font-display); font-size:15rem; line-height:1; }
.icu-v5 .o005-serendipity h2 { margin:0; font-family:var(--font-display); font-size:var(--text-2xl); font-weight:520; }
.icu-v5 .o005-serendipity p { max-width:50ch; margin:0; color:var(--muted); }
.icu-v5 .o005-boundary { min-width:0; display:grid; grid-template-columns:minmax(0,1fr); align-content:start; gap:1rem; padding:1.25rem; border:1px solid color-mix(in srgb,var(--gold) 35%,var(--border)); border-radius:var(--r-xl); background:linear-gradient(145deg,color-mix(in srgb,var(--gold) 5%,var(--surface)),var(--surface)); }
.icu-v5 .o005-boundary h3 { margin:0; font-family:var(--font-display); font-size:1.55rem; font-weight:530; }
.icu-v5 .o005-boundary p { margin:0; color:var(--muted); }
.icu-v5 .o005-boundary .status { width:max-content; max-width:100%; padding:.3rem .55rem; border:1px solid color-mix(in srgb,var(--gold) 55%,var(--border)); border-radius:var(--r-pill); color:var(--gold); font-size:.75rem; font-weight:760; }

@media (max-width:70rem){
  .icu-v5 .v5-primary-nav{display:none}.icu-v5 .o005-entry-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.icu-v5 .o005-library-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:54rem){
  .icu-v5 .o005-hero-grid,.icu-v5 .o005-section-head,.icu-v5 .o005-legacy-panel,.icu-v5 .o005-final-grid{grid-template-columns:minmax(0,1fr)}
  .icu-v5 .o005-orbit{max-width:34rem;width:100%;margin-inline:auto}.icu-v5 .v5-footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.icu-v5 .v5-footer-intro{grid-column:1/-1}
}
@media (max-width:680px){
  .icu-v5 .v5-brand-sub,.icu-v5 .v5-action-label{display:none}
  .icu-v5 .v5-header-row{min-height:68px;gap:8px}
  .icu-v5 .v5-public-brand{gap:8px;overflow:hidden}
  .icu-v5 .v5-brand-copy{overflow:hidden}
  .icu-v5 .v5-brand-name{font-size:0!important;white-space:nowrap;overflow:hidden}
  .icu-v5 .v5-brand-name::after{content:"ICU";font-size:13px;letter-spacing:.08em}
  .icu-v5 .v5-brand-mark{inline-size:36px;block-size:36px}
  .icu-v5 .v5-brand-mark img{inline-size:24px;block-size:24px}
  .icu-v5 .v5-header-actions{gap:2px;flex:0 0 auto}
  .icu-v5 .v5-shell-action{min-width:44px;min-height:44px;padding:8px}
  .icu-v5 .o005-hero{padding-top:3.2rem}
  .icu-v5 .o005-hero h1{font-size:clamp(3.1rem,16vw,5rem);max-width:9ch}
  .icu-v5 .o005-orbit{min-height:18rem;max-width:100%}
  .icu-v5 .o005-orbit-center{inline-size:7.3rem;block-size:7.3rem}
  .icu-v5 .o005-entry-grid,.icu-v5 .o005-library-grid,.icu-v5 .o005-legacy-grid{grid-template-columns:minmax(0,1fr)}
  .icu-v5 .o005-entry{min-height:10.5rem}
  .icu-v5 .o005-status-strip{grid-template-columns:minmax(0,1fr)}
  .icu-v5 .o005-status{border-right:0;border-bottom:1px solid var(--border-soft)}
  .icu-v5 .o005-status:last-child{border-bottom:0}
  .icu-v5 .v5-menu-grid{grid-template-columns:minmax(0,1fr)}
  .icu-v5 .v5-footer-grid{grid-template-columns:minmax(0,1fr)}
  .icu-v5 .v5-footer-intro{grid-column:auto}
  .icu-v5 .o005-search-box{grid-template-columns:minmax(0,1fr);border-radius:var(--r-lg)}
  .icu-v5 .o005-search-box button{width:100%}
  .icu-v5 .o005-legacy-stats{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:376px){
  .icu-v5 .v5-shell-action{padding:6px}.icu-v5 .v5-header-actions{gap:0}.icu-v5 .o005-orbit-label{font-size:.68rem;padding:.3rem .48rem}
}
@media (prefers-reduced-motion: reduce){.icu-v5 .o005-entry:hover{transform:none}}