/* Reality Kernel website. One stylesheet, no build step.
   Concept: rules carved in stone, lit by a signal. Basalt surfaces with
   engraved hairlines; a single signal colour that follows the site's mode,
   exactly as the product does: cobalt in `enforce`, amber in `audit`.
   EPERM red is reserved for denials. Dark stage bands carry the story;
   light paper panels carry anything meant to be read at length. */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/fonts/ibm-plex-sans-var-latin.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Serif";
  src: url("/fonts/instrument-serif-400-latin.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Serif";
  src: url("/fonts/instrument-serif-400-italic-latin.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/fonts/ibm-plex-mono-400-latin.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/fonts/ibm-plex-mono-500-latin.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ── Tokens ───────────────────────────────────────────────────────────── */
:root {
  /* Basalt: a cool near-black, never flat. */
  --bg: #08090c;
  --bg-raised: #0d0f14;
  --surface: #12151c;
  --ink: #e9ecf2;
  --muted: #a3aab7;
  --faint: #6b7383;
  --line: #1c2029;
  --line-strong: #2b313e;
  --allow: #52d394;
  --hit-red: #ff4d5e;

  /* Signal follows the mode (see [data-mode] below). Default: enforce. */
  --signal: #7a8dff;
  --signal-strong: #4a62ff;
  --signal-ink: #0a0c12;
  --signal-soft: rgb(122 141 255 / 0.12);
  --signal-glow: rgb(74 98 255 / 0.28);
  --hit: var(--hit-red);
  --paper-signal: #2c45d6;

  /* Paper: reading panels, cool stone white. */
  --paper-bg: #eceef2;
  --paper-surface: #f7f8fa;
  --paper-ink: #0c0f15;
  --paper-muted: #4a5261;
  --paper-faint: #6d7585;
  --paper-line: #d2d7df;

  /* Terminal surfaces stay terminal-dark everywhere. */
  --term-bg: #05060a;
  --term-line: #1a1f2b;
  --term-ink: #d6deeb;
  --term-dim: #7f8ca3;
  --term-allow: #5fd49a;

  --font-sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-display: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --step--1: 0.8125rem;
  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: 1.5rem;
  --step-3: 2rem;

  --measure: 65ch;
  --wide: 72rem;
  --gutter-l: max(16px, env(safe-area-inset-left, 0px));
  --gutter-r: max(16px, env(safe-area-inset-right, 0px));
  color-scheme: dark;
}
:root[data-mode="audit"] {
  --signal: #f2b33d;
  --signal-strong: #e3951c;
  --signal-ink: #120c02;
  --signal-soft: rgb(242 179 61 / 0.12);
  --signal-glow: rgb(227 149 28 / 0.26);
  --hit: #f2b33d;
  --paper-signal: #8f5600;
}

/* ── Base ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
.mode-ready body, .mode-ready .stage, .mode-ready .btn, .mode-ready .mode-switch { transition: background-color .35s ease, color .35s ease, border-color .35s ease, box-shadow .35s ease; }
img, svg { max-width: 100%; }
img { height: auto; }
a { color: var(--signal); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
h1, h2, h3 { color: var(--ink); line-height: 1.15; text-wrap: balance; margin: 0; }
h1, h2 { font-family: var(--font-display); font-weight: 400; letter-spacing: -0.012em; }
h1 { font-size: clamp(2.6rem, 1.6rem + 4.2vw, 5rem); line-height: 1; }
h2 { font-size: clamp(2rem, 1.3rem + 2.6vw, 3.25rem); line-height: 1.04; }
h3 { font-family: var(--font-sans); font-size: var(--step-1); font-weight: 600; letter-spacing: -0.01em; }
h1 em, h2 em { font-style: italic; color: var(--signal); }
p { margin: 0; }
code, kbd, pre { font-family: var(--font-mono); font-size: 0.9em; }
:not(pre) > code { background: var(--signal-soft); color: var(--ink); padding: 0.1em 0.35em; overflow-wrap: anywhere; }
::selection { background: var(--signal); color: var(--signal-ink); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: var(--gutter-l); top: 0.5rem; z-index: 100; background: var(--surface); padding: 0.5rem 0.75rem; }
.wrap { width: 100%; max-width: calc(var(--wide) + 32px); margin-inline: auto; padding-left: var(--gutter-l); padding-right: var(--gutter-r); }
.label, .sigil { font-family: var(--font-mono); font-size: var(--step--1); font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); }
.sigil { color: var(--signal); display: flex; align-items: center; gap: 0.8rem; }
.sigil::before { content: "//"; opacity: 0.6; }
.lede { font-size: var(--step-1); color: var(--muted); max-width: var(--measure); }
.muted { color: var(--muted); }
/* Mode-specific copy: one of each pair is shown. */
[data-mode="audit"] .when-enforce, :root:not([data-mode="audit"]) .when-audit { display: none; }

/* ── Header ───────────────────────────────────────────────────────────── */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 60; background: var(--bg); }
.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgb(255 255 255 / 0.02);
}
.site-header .wrap { display: flex; align-items: center; gap: 1.5rem; min-height: 4rem; }
.brand { display: inline-flex; align-items: center; gap: 0.7rem; color: var(--ink); text-decoration: none; margin-right: auto; }
.brand img { width: 30px; height: 30px; border-radius: 50%; }
.brand strong { font-family: var(--font-display); font-weight: 400; font-size: 1.45rem; line-height: 1; letter-spacing: -0.005em; color: var(--ink); white-space: nowrap; }
.brand span { font-family: var(--font-mono); font-size: 0.7rem; color: var(--faint); letter-spacing: 0.04em; }
.brand .brand-text { display: grid; line-height: 1.2; }
.nav { display: flex; align-items: center; gap: 0.15rem; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.93rem; padding: 0.4rem 0.7rem; }
.nav a:hover { color: var(--ink); background: var(--signal-soft); }
.nav a.active { color: var(--ink); box-shadow: inset 0 -2px 0 var(--signal); }
.header-actions { display: flex; align-items: center; gap: 0.5rem; }
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.icon-btn svg { width: 1rem; height: 1rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn svg.fill { fill: currentColor; stroke: none; }
.menu-toggle { display: none; }

/* The mode switch, written as the policy line it toggles. */
.mode-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  height: 2.25rem;
  padding: 0 0.75rem;
  border: 1px solid var(--signal);
  background: var(--signal-soft);
  color: var(--ink);
  font: 500 0.78rem/1 var(--font-mono);
  cursor: pointer;
  box-shadow: 0 0 18px -6px var(--signal-glow);
}
.mode-switch:hover { background: rgb(255 255 255 / 0.04); }
.mode-switch .mode-value { color: var(--signal); }
.mode-text { white-space: pre; }
.mode-dot { width: 8px; height: 8px; background: var(--signal); box-shadow: 0 0 10px var(--signal); position: relative; flex: none; }
.mode-dot::after { content: ""; position: absolute; inset: -4px; border: 1px solid var(--signal); animation: pulse 2.2s ease-out infinite; }
@keyframes pulse { from { opacity: 0.9; transform: scale(0.6); } to { opacity: 0; transform: scale(1.9); } }

@media (max-width: 860px) {
  .menu-toggle { display: inline-grid; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem var(--gutter-r) 0.75rem var(--gutter-l);
    background: var(--bg-raised);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 0.75rem 0.5rem; }
  .brand span { display: none; }
}
@media (max-width: 480px) { .mode-switch .mode-key { display: none; } .site-header .wrap { gap: 0.75rem; } .brand strong { font-size: 1.3rem; } }
@media (max-width: 400px) { .header-gh { display: none; } }

/* ── Buttons ──────────────────────────────────────────────────────────── */
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn {
  transition: transform .25s cubic-bezier(.2,.8,.2,1), border-color .2s ease, filter .2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  line-height: 1.2;
}
.btn:hover { border-color: var(--signal); text-decoration: none; }
.btn.primary { background: var(--signal); border-color: var(--signal); color: var(--signal-ink); box-shadow: 0 10px 30px -12px var(--signal-glow); }
.btn.primary:hover { filter: brightness(1.08); }
.btn svg { width: 1.05rem; height: 1.05rem; fill: currentColor; }

/* ── Bands ────────────────────────────────────────────────────────────── */
.stage {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(52rem 26rem at 76% 30%, var(--signal-glow), transparent 64%),
    radial-gradient(rgb(255 255 255 / 0.022) 1px, transparent 1px) 0 0 / 3px 3px,
    var(--bg);
}
.section { padding-block: clamp(4rem, 8vw, 6.5rem); }
/* Two dark sections in a row share one gap, split by an engraved hairline. */
.section:not(.paper) + .section:not(.paper) { padding-top: 0; }
.section:not(.paper):has(+ .section:not(.paper)) { padding-bottom: clamp(3rem, 6vw, 4.5rem); }
.section:not(.paper) + .section:not(.paper) > .wrap::before { content: ""; display: block; height: 1px; background: var(--line); margin-bottom: clamp(3rem, 6vw, 4.5rem); }
.section-head { display: grid; gap: 0.9rem; max-width: 48rem; margin-bottom: 2.75rem; }
.section-head p { color: var(--muted); }
.paper { background: var(--paper-bg); color: var(--paper-ink); }
.paper h1, .paper h2, .paper h3, .paper strong { color: var(--paper-ink); }
.paper h1 em, .paper h2 em, .paper .sigil, .paper a { color: var(--paper-signal); }
.paper p, .paper li, .paper .section-head p, .paper td { color: var(--paper-muted); }
.paper :not(pre) > code { background: rgb(12 15 21 / 0.07); color: var(--paper-ink); }
.paper ::selection { background: var(--paper-signal); color: #fff; }

/* Hash-chain divider: each section links to the one before, like the audit log. */
.chain {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.6rem;
  padding-block: 0.7rem;
  border-block: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  background: var(--bg-raised);
}
.chain .wrap { display: flex; flex-wrap: wrap; gap: 0.4rem 1.6rem; }
.chain b { color: var(--signal); font-weight: 500; }
.chain .ok { color: var(--allow); }

/* ── Hero ─────────────────────────────────────────────────────────────── */
.hero .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  padding-block: clamp(3rem, 7vw, 5.5rem);
}
.hero-text { display: grid; gap: 1.4rem; min-width: 0; }
.boot { margin: 0; font-family: var(--font-mono); font-size: 0.74rem; line-height: 1.75; color: var(--faint); white-space: pre-wrap; overflow-wrap: anywhere; min-height: 5.25em; }
.boot span { display: block; }
.boot b { color: var(--allow); font-weight: 500; }
.boot i { font-style: normal; color: var(--signal); }
.boot .typing::after { content: "\258C"; color: var(--signal); animation: caret 1s steps(1) infinite; }
@keyframes caret { 50% { opacity: 0; } }
.wordmark {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(3.6rem, 2rem + 6vw, 7rem);
  line-height: 0.88;
  letter-spacing: -0.025em;
  margin: 0;
}
.wordmark span { display: block; }
.wordmark .k { font-style: italic; color: var(--signal); text-shadow: 0 0 34px var(--signal-glow); padding-left: 0.04em; }
.tagline { font-family: var(--font-display); font-size: clamp(1.6rem, 1.2rem + 1.4vw, 2.3rem); font-weight: 400; letter-spacing: -0.005em; line-height: 1.12; color: var(--ink); max-width: 31ch; }
.tagline em { font-style: italic; color: var(--hit); }
.hero-facts { display: flex; flex-wrap: wrap; gap: 0.4rem 1.25rem; font-family: var(--font-mono); font-size: var(--step--1); color: var(--faint); list-style: none; padding: 0; margin: 0; }
.watch { min-width: 0; display: grid; gap: 0.9rem; justify-items: center; }
.watch-stage { position: relative; width: 100%; }
#owl-canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; --c-signal: var(--signal); --c-hit-red: var(--hit-red); }
#hero-canvas {
  position: relative;
  display: block;
  width: 100%;
  height: clamp(400px, 42vw, 540px);
  cursor: pointer;
  --c-ink: #8f9ab0;
  --c-dim: #262c3a;
  --c-allow: var(--allow);
  --c-hit: var(--hit);
  --c-signal: var(--signal);
  --c-body: #0a0c11;
}
.watch-status {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--line-strong);
  background: rgb(8 9 12 / 0.85);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
  margin: 0;
}
.watch-status b { color: var(--signal); font-weight: 500; }
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); padding-block: 1.5rem 3.5rem; }
  .watch { order: -1; }
  #hero-canvas { height: 330px; }
  .watch-status { white-space: normal; text-align: center; }
}

/* ── The audit tape ───────────────────────────────────────────────────── */
.tape {
  position: relative;
  border-block: 1px solid var(--line-strong);
  border-top-color: color-mix(in srgb, var(--line-strong), var(--signal) calc(var(--dissolve, 0) * 100%));
  box-shadow: 0 -1px calc(var(--dissolve, 0) * 26px) var(--signal-glow);
  background: var(--term-bg);
  overflow: hidden;
}
.tape-head {
  position: absolute;
  z-index: 2;
  left: 0;
  top: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  padding: 0 1.5rem 0 var(--gutter-l);
  background: var(--term-bg);
  box-shadow: 24px 0 18px var(--term-bg);
  border-right: 1px solid var(--term-line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--signal);
  white-space: nowrap;
}
.tape-track { display: flex; width: max-content; animation: tape 46s linear infinite; padding-left: 15rem; }
.tape ul { display: flex; gap: 3rem; list-style: none; margin: 0; padding: 0.8rem 1.5rem; }
.tape li { font-family: var(--font-mono); font-size: 0.78rem; color: color-mix(in srgb, var(--term-dim), var(--term-ink) calc(var(--dissolve, 0) * 100%)); white-space: nowrap; }
.tape li b { color: var(--hit); font-weight: 500; }
.tape li i { font-style: normal; color: var(--term-ink); }
@keyframes tape { to { transform: translateX(-50%); } }

/* ── The decision trace (terminal surface) ────────────────────────────── */
.trace { margin: 0; background: var(--term-bg); color: var(--term-ink); border: 1px solid var(--term-line); box-shadow: 0 30px 60px -30px rgb(0 0 0 / 0.6); min-width: 0; overflow: hidden; }
.trace-pane { padding: 1rem 1.15rem 1.15rem; min-width: 0; }
.trace-pane + .trace-pane { border-top: 1px dashed var(--term-line); }
.trace-title { display: flex; justify-content: space-between; gap: 1rem; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--term-dim); margin-bottom: 0.6rem; }
.trace pre { margin: 0; font-size: 0.78rem; line-height: 1.75; overflow-x: auto; white-space: pre; scrollbar-width: thin; }
.trace .p { color: var(--term-dim); }
.trace .deny { color: var(--hit); font-weight: 500; }
.trace .allow { color: var(--term-allow); }
.trace .acc { color: var(--signal); }
.trace .boundary { display: flex; align-items: center; gap: 0.75rem; padding: 0.45rem 1.15rem; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--signal); background: var(--signal-soft); border-block: 1px solid var(--term-line); }
.trace .boundary::before, .trace .boundary::after { content: ""; flex: 1; height: 1px; background: currentColor; opacity: 0.35; }
.split-2 { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; margin-bottom: 3rem; }
@media (max-width: 900px) { .split-2 { grid-template-columns: minmax(0, 1fr); } }

/* ── Boundary diagram, with decisions flowing through the pipelines ───── */
.diagram { border: 1px solid var(--line-strong); background: rgb(255 255 255 / 0.015); overflow-x: auto; }
.layer { display: grid; grid-template-columns: 9rem minmax(0, 1fr); min-width: 34rem; }
.layer + .layer { border-top: 1px solid var(--line-strong); }
.layer-name { padding: 1.25rem 1rem; font-family: var(--font-mono); font-size: var(--step--1); color: var(--faint); border-right: 1px solid var(--line-strong); }
.layer-body { display: flex; flex-wrap: wrap; gap: 0.6rem; padding: 1.1rem 1.25rem; align-items: center; }
.node { font-family: var(--font-mono); font-size: 0.82rem; padding: 0.35rem 0.6rem; border: 1px solid var(--line-strong); background: var(--bg-raised); color: var(--ink); white-space: nowrap; }
.node.key { border-color: var(--signal); color: var(--signal); background: var(--signal-soft); }
.node.deny { border-color: var(--hit); color: var(--hit); }
.spacer { width: 1.5rem; }
.arrow {
  display: inline-block;
  width: 34px;
  height: 2px;
  font-size: 0;
  background: linear-gradient(90deg, transparent 0 20%, var(--signal) 50%, transparent 80% 100%) 0 0 / 200% 100%, var(--signal-soft);
  box-shadow: 0 0 8px var(--signal-glow);
  animation: flow 1.8s linear infinite;
}
@keyframes flow { from { background-position: 100% 0, 0 0; } to { background-position: -100% 0, 0 0; } }
.layer.kernel { background: var(--signal-soft); }
.layer.kernel .layer-name, .layer.syscall .layer-body { color: var(--signal); }
.layer.syscall .layer-body { padding-block: 0.5rem; font-family: var(--font-mono); font-size: var(--step--1); }

/* ── Capabilities (on paper) ──────────────────────────────────────────── */
.caps { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); border-top: 1px solid var(--paper-line); border-left: 1px solid var(--paper-line); }
.cap { display: grid; align-content: start; gap: 0.75rem; padding: 1.5rem; border-right: 1px solid var(--paper-line); border-bottom: 1px solid var(--paper-line); background: var(--paper-surface); min-width: 0; transition: transform .25s ease, box-shadow .25s ease; }
.cap:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -26px rgb(12 15 21 / 0.4); position: relative; z-index: 1; }
.cap .label { color: var(--paper-signal); }
.cap p { font-size: 0.97rem; }
.evidence { font-family: var(--font-mono); font-size: var(--step--1); display: flex; flex-wrap: wrap; gap: 0.25rem 0.9rem; }
.evidence a { text-decoration: none; }
.evidence a::before { content: "✓ "; color: #1f8a56; }
.evidence a:hover { text-decoration: underline; }

/* ── Steps (a real sequence, so numbered) ─────────────────────────────── */
.steps { list-style: none; counter-reset: step; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 2rem; }
.steps li { counter-increment: step; display: grid; gap: 0.5rem; align-content: start; min-width: 0; }
.steps li::before { content: counter(step, decimal-leading-zero); font-family: var(--font-display); font-weight: 400; font-size: 2rem; line-height: 1; color: var(--signal); border-top: 1px solid var(--signal); padding-top: 0.7rem; }
.steps p { color: var(--muted); font-size: 0.97rem; }

/* ── Code blocks ──────────────────────────────────────────────────────── */
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 26rem), 1fr)); gap: 1.5rem; align-items: start; }
.code { background: var(--term-bg); color: var(--term-ink); border: 1px solid var(--term-line); min-width: 0; overflow: hidden; }
.code-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.55rem 0.6rem 0.55rem 1rem; border-bottom: 1px solid var(--term-line); font-family: var(--font-mono); font-size: 0.75rem; color: var(--term-dim); }
.copy { font: inherit; color: var(--term-dim); background: transparent; border: 1px solid var(--term-line); padding: 0.2rem 0.55rem; cursor: pointer; }
.copy:hover { color: var(--term-ink); border-color: var(--term-dim); }
.code pre { margin: 0; padding: 1rem; overflow-x: auto; font-size: 0.82rem; line-height: 1.7; }
.code .c { color: var(--term-dim); }
.code .k { color: var(--signal); }
.code .s { color: var(--term-allow); }

/* ── Kernel matrix ────────────────────────────────────────────────────── */
.kernels { display: flex; flex-wrap: wrap; gap: 0.75rem; list-style: none; padding: 0; margin: 0; }
.kernels li { display: grid; gap: 0.15rem; padding: 0.9rem 1.15rem; border: 1px solid var(--line-strong); background: var(--bg-raised); min-width: 7.5rem; }
.kernels strong { font-family: var(--font-display); font-size: 2rem; font-weight: 400; line-height: 1; font-variant-numeric: lining-nums tabular-nums; }
.kernels span { font-family: var(--font-mono); font-size: 0.72rem; color: var(--faint); text-transform: uppercase; letter-spacing: 0.08em; }
.checks { display: grid; gap: 0.6rem; list-style: none; padding: 0; margin: 2rem 0 0; max-width: var(--measure); }
.checks li { padding-left: 1.6rem; position: relative; color: var(--muted); }
.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--allow); font-weight: 600; }
.after-list { margin-top: 2rem; }

/* ── Closing ──────────────────────────────────────────────────────────── */
.closing .wrap { display: grid; gap: 1.5rem; justify-items: start; padding-block: clamp(4rem, 8vw, 6.5rem); }
.closing h2 { max-width: 22ch; }

/* ── Secondary pages: a stage head, then the reading on paper ─────────── */
.page-head .wrap { display: grid; gap: 1rem; padding-block: clamp(3rem, 7vw, 5rem) clamp(2.5rem, 5vw, 3.5rem); }
.page-head .wrap::before {
  content: "";
  width: 52px;
  height: 52px;
  background: var(--signal);
  -webkit-mask: url("/owl.svg") center / contain no-repeat;
          mask: url("/owl.svg") center / contain no-repeat;
  filter: drop-shadow(0 0 12px var(--signal-glow));
}
.page-head h1 { max-width: 22ch; }
.prose .wrap { padding-block: clamp(2.5rem, 6vw, 4rem) clamp(4rem, 8vw, 6rem); }
.prose .wrap > * { max-width: var(--measure); }
.prose h2 { font-size: clamp(1.75rem, 1.3rem + 1.4vw, 2.3rem); margin-top: 3rem; margin-bottom: 1rem; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.75rem; margin-bottom: 0.5rem; }
.prose p + p, .prose p + ul, .prose ul + p { margin-top: 0.9rem; }
.prose ul, .prose ol { padding-left: 1.2rem; display: grid; gap: 0.4rem; margin: 0.9rem 0 0; }
.prose strong { font-weight: 600; }
.prose .table-wrap, .prose .doc-list, .prose .code { max-width: none; }
.table-wrap { overflow-x: auto; margin-top: 1.25rem; border: 1px solid var(--paper-line); background: var(--paper-surface); }
table { border-collapse: collapse; width: 100%; font-size: 0.93rem; min-width: 38rem; }
th, td { text-align: left; vertical-align: top; padding: 0.75rem 1rem; border-bottom: 1px solid var(--paper-line); }
th { font-family: var(--font-mono); font-size: 0.74rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--paper-faint); }
tr:last-child td { border-bottom: 0; }
td:first-child { color: var(--paper-ink); }
.doc-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr)); border-top: 1px solid var(--paper-line); border-left: 1px solid var(--paper-line); margin-top: 1.25rem; }
.doc-list a { display: grid; gap: 0.3rem; padding: 1.15rem 1.25rem; border-right: 1px solid var(--paper-line); border-bottom: 1px solid var(--paper-line); background: var(--paper-surface); text-decoration: none; color: var(--paper-ink); min-width: 0; transition: transform .2s ease, box-shadow .2s ease; }
.doc-list a:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -22px rgb(12 15 21 / 0.45); position: relative; z-index: 1; }
.doc-list a strong { font-weight: 600; }
.doc-list a strong::after { content: " →"; color: var(--paper-signal); }
.doc-list a span { color: var(--paper-muted); font-size: 0.93rem; }
.prose .code { margin-top: 1.25rem; }
.quote { display: flex; gap: 1.25rem; align-items: flex-start; margin: 1.5rem 0 0; padding: 1.5rem; border: 1px solid var(--paper-line); background: var(--paper-surface); }
.quote img { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; flex: none; }
.quote blockquote { margin: 0; display: grid; gap: 0.6rem; min-width: 0; }
.quote blockquote p { color: var(--paper-ink); font-size: var(--step-1); line-height: 1.5; }
.quote footer { font-family: var(--font-mono); font-size: var(--step--1); color: var(--paper-faint); }
@media (max-width: 520px) { .quote { flex-direction: column; } }

/* ── Not found ────────────────────────────────────────────────────────── */
.nf .wrap { display: grid; gap: 1.25rem; justify-items: start; padding-block: clamp(4rem, 12vw, 8rem); }
.nf pre { font-size: 0.85rem; color: var(--hit); margin: 0; white-space: pre-wrap; }

/* ── Footer ───────────────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-raised); padding-block: 3rem 2rem; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); gap: 2rem; }
.footer-grid p { color: var(--muted); font-size: 0.93rem; max-width: 34ch; margin-top: 0.75rem; }
.footer-grid h2 { font-family: var(--font-mono); font-size: 0.74rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin-bottom: 0.75rem; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.footer-grid a { color: var(--ink); text-decoration: none; font-size: 0.93rem; }
.footer-grid a:hover { color: var(--signal); text-decoration: underline; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--line); font-family: var(--font-mono); font-size: 0.75rem; color: var(--faint); }
.social { display: flex; gap: 0.5rem; }
.social a { display: inline-grid; place-items: center; width: 2rem; height: 2rem; border: 1px solid var(--line-strong); color: var(--muted); }
.social a:hover { color: var(--signal); border-color: var(--signal); }
.social svg { width: 0.95rem; height: 0.95rem; fill: currentColor; }
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}

/* ── The Warden watches: cursor reticle and the perched owl ───────────── */
.rk-cursor {
  position: fixed;
  z-index: 90;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border: 1px solid var(--signal);
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s ease, border-color .2s ease;
}
.rk-cursor::before, .rk-cursor::after { content: ""; position: absolute; background: var(--signal); transition: opacity .2s ease; }
.rk-cursor::before { left: 50%; top: -5px; bottom: -5px; width: 1px; transform: translateX(-50%); opacity: 0.5; }
.rk-cursor::after { top: 50%; left: -5px; right: -5px; height: 1px; transform: translateY(-50%); opacity: 0.5; }
.rk-cursor.on { opacity: 0.9; }
/* Target lock: corner brackets around the element */
.rk-cursor.lock {
  border-color: transparent;
  background:
    linear-gradient(var(--signal), var(--signal)) top left / 12px 2px no-repeat,
    linear-gradient(var(--signal), var(--signal)) top left / 2px 12px no-repeat,
    linear-gradient(var(--signal), var(--signal)) top right / 12px 2px no-repeat,
    linear-gradient(var(--signal), var(--signal)) top right / 2px 12px no-repeat,
    linear-gradient(var(--signal), var(--signal)) bottom left / 12px 2px no-repeat,
    linear-gradient(var(--signal), var(--signal)) bottom left / 2px 12px no-repeat,
    linear-gradient(var(--signal), var(--signal)) bottom right / 12px 2px no-repeat,
    linear-gradient(var(--signal), var(--signal)) bottom right / 2px 12px no-repeat;
  filter: drop-shadow(0 0 6px var(--signal-glow));
}
.rk-cursor.lock::before, .rk-cursor.lock::after { opacity: 0; }
.rk-cursor.press { border-color: var(--hit); }
.rk-cursor-tag {
  position: fixed;
  z-index: 91;
  left: 0;
  top: 0;
  padding: 0.22rem 0.5rem;
  background: rgb(8 9 12 / 0.92);
  border: 1px solid var(--line-strong);
  font: 500 0.7rem/1.3 var(--font-mono);
  color: var(--allow);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s ease;
}
.rk-cursor-tag.on { opacity: 1; }
.mini-warden {
  position: fixed;
  z-index: 40;
  right: max(18px, env(safe-area-inset-right, 0px));
  bottom: max(18px, env(safe-area-inset-bottom, 0px));
  display: grid;
  justify-items: center;
  gap: 0.2rem;
  padding: 0.5rem 0.55rem 0.4rem;
  border: 1px solid var(--line-strong);
  background: rgb(8 9 12 / 0.9);
  color: var(--signal);
  cursor: pointer;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity .35s ease, transform .35s ease, border-color .2s ease;
  box-shadow: 0 14px 30px -18px var(--signal-glow);
}
.mini-warden.on { opacity: 1; transform: none; pointer-events: auto; }
.mini-warden:hover { border-color: var(--signal); }
.mini-warden svg { width: 46px; height: 46px; overflow: visible; }
.mw-body { fill: var(--bg); stroke: currentColor; stroke-width: 2.4; filter: drop-shadow(0 0 6px var(--signal-glow)); }
.mw-line { fill: none; stroke: currentColor; stroke-width: 2.2; }
.mw-faint { opacity: 0.5; }
.mw-eye { fill: currentColor; }
[data-mode="audit"] .mw-eye { transform: scaleY(0.55); transform-box: fill-box; transform-origin: center; }
.mw-label { font: 500 0.6rem/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
/* The boundary follows the page: a scroll line under the header, with the Warden riding it. */
.rk-progress { position: fixed; z-index: 55; left: 0; right: 0; top: calc(env(safe-area-inset-top, 0px) + 4rem); height: 2px; pointer-events: none; }
.rk-progress-fill { position: absolute; inset: 0; background: var(--signal); box-shadow: 0 0 10px var(--signal-glow); transform-origin: left; transform: scaleX(0); }
.rk-progress-rider {
  position: absolute;
  left: 0;
  top: -13px;
  width: 14px;
  height: 14px;
  background: var(--signal);
  -webkit-mask: url("/owl.svg") center / contain no-repeat;
          mask: url("/owl.svg") center / contain no-repeat;
  filter: drop-shadow(0 0 6px var(--signal-glow));
}
@media (hover: none), (pointer: coarse) { .rk-cursor, .rk-cursor-tag { display: none; } }
@media (max-width: 760px), (pointer: coarse) { .mini-warden { display: none; } }

/* ── Motion ───────────────────────────────────────────────────────────── */
/* Content is visible at rest; with JS it eases up into place. */
.js .reveal { transform: translateY(18px); transition: transform .7s cubic-bezier(.16,1,.3,1); }
.js .reveal.in { transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}