/* ============================================================
   Qervan — Neo-brutalist security. Light theme, hard edges.
   Paper white base, true black structure, one acid yellow accent,
   alert red reserved for risk items. No rounded corners. No blur.
   ============================================================ */

:root {
  --paper: #fdfdfd;
  --ink: #0a0a0a;
  --acid: #e8ff3a;
  --alert: #ff3b30;
  --shadow: 6px 6px 0 var(--ink);
  --shadow-lg: 10px 10px 0 var(--ink);
  --rule: 3px solid var(--ink);
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --font-display: "Archivo Black", "Arial Black", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --maxw: 1200px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  font-weight: 400;
  position: relative;
  overflow-x: hidden;
}

/* Halftone dot field — keeps the white from reading as a flat slab */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(rgba(10, 10, 10, 0.16) 1px, transparent 1.2px);
  background-size: 11px 11px;
  background-position: 0 0;
  opacity: 0.55;
  mix-blend-mode: multiply;
}

body > * { position: relative; z-index: 1; }

img { max-width: 100%; display: block; }

a { color: var(--ink); text-underline-offset: 3px; text-decoration-thickness: 2px; }

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--alert);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -100px;
  z-index: 100;
  background: var(--acid);
  color: var(--ink);
  border: var(--rule);
  padding: 10px 16px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- Shell ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Top bar ---------- */
.bar {
  border-bottom: var(--rule);
  background: var(--ink);
  color: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
}
.bar__in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.bar__mark {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--paper);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}
.bar__mark b {
  background: var(--acid);
  color: var(--ink);
  padding: 2px 8px;
  display: inline-block;
}
.bar__nav { display: flex; flex-wrap: wrap; gap: 4px; }
.bar__nav a {
  color: var(--paper);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 10px 12px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border: 2px solid transparent;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.bar__nav a:hover,
.bar__nav a:focus-visible {
  background: var(--acid);
  color: var(--ink);
  border-color: var(--acid);
}

/* ---------- Hero ---------- */
.hero { padding: 56px 0 40px; }
.hero__grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 32px;
  align-items: start;
}
.eyebrow {
  display: inline-block;
  background: var(--ink);
  color: var(--acid);
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 7px 14px;
  margin: 0 0 22px;
}
h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6.2vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin: 0 0 22px;
}
h1 mark {
  background: var(--acid);
  color: var(--ink);
  padding: 0 6px;
}
.hero__lede {
  font-size: 1.2rem;
  line-height: 1.55;
  max-width: 44ch;
  margin: 0 0 26px;
}
.hero__meta {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero__meta li {
  border: 2px solid var(--ink);
  background: var(--paper);
  padding: 8px 12px;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.hero__meta li b { color: var(--ink); }

/* Sticker panel in the hero */
.sticker {
  border: var(--rule);
  background: var(--acid);
  color: var(--ink);
  box-shadow: var(--shadow-lg);
  padding: 22px 20px 20px;
  transform: rotate(-2deg);
}
.sticker h2 {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  border-bottom: 3px solid var(--ink);
  padding-bottom: 10px;
}
.sticker ul { margin: 0; padding-left: 20px; }
.sticker li { font-weight: 600; padding: 3px 0; }
.sticker li span { font-weight: 400; display: block; font-size: 0.9rem; }

/* ---------- Figures ---------- */
.fig { margin: 34px 0; }
.fig__frame {
  border: var(--rule);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  background: var(--ink);
}
.fig__frame img {
  width: 100%;
  height: auto;
  filter: grayscale(1) contrast(1.35) brightness(1.02);
  transition: filter 0.4s var(--ease);
}
.fig__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--acid);
  mix-blend-mode: multiply;
  opacity: 0.28;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
}
.fig:hover .fig__frame::after,
.fig:focus-within .fig__frame::after { opacity: 0.08; }
.fig:hover .fig__frame img { filter: grayscale(0.15) contrast(1.15); }
.fig figcaption {
  font-size: 0.86rem;
  font-weight: 500;
  margin-top: 12px;
  padding-left: 14px;
  border-left: 6px solid var(--acid);
  display: block;
}
.fig__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  background: var(--ink);
  color: var(--acid);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 10px;
  transform: rotate(-1.5deg);
}

/* ---------- Body layout ---------- */
.dossier {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
  padding-top: 24px;
  padding-bottom: 60px;
}
.toc {
  position: sticky;
  top: 84px;
  border: var(--rule);
  box-shadow: var(--shadow);
  padding: 18px 16px;
  background: var(--paper);
}
.toc__title {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--ink);
}
.toc ol { margin: 0; padding: 0; list-style: none; counter-reset: toc; }
.toc li { counter-increment: toc; }
.toc a {
  display: flex;
  gap: 10px;
  padding: 9px 8px;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  border: 2px solid transparent;
  min-height: 44px;
  align-items: center;
  transition: background 0.16s var(--ease), border-color 0.16s var(--ease);
}
.toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: 0.72rem;
  background: var(--ink);
  color: var(--acid);
  padding: 2px 5px;
  flex: none;
}
.toc a:hover,
.toc a:focus-visible,
.toc a[aria-current="true"] {
  background: var(--acid);
  border-color: var(--ink);
}

.prose { max-width: 78ch; }
.prose section { margin-bottom: 62px; }

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  margin: 0 0 20px;
  padding-bottom: 14px;
  border-bottom: 3px solid var(--ink);
}
h2 .num {
  display: inline-block;
  background: var(--ink);
  color: var(--acid);
  font-size: 0.5em;
  padding: 4px 9px;
  margin-right: 12px;
  vertical-align: middle;
  letter-spacing: 0.04em;
}
h3 {
  font-family: var(--font-display);
  font-size: 1.22rem;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin: 34px 0 12px;
}
.prose p { margin: 0 0 20px; }
.prose .lede { font-size: 1.16rem; font-weight: 500; }

/* Black plate that breaks the white */
.plate {
  background: var(--ink);
  color: var(--paper);
  border: var(--rule);
  box-shadow: var(--shadow-lg);
  padding: 28px 26px;
  margin: 32px 0;
  position: relative;
}
.plate p { color: var(--paper); }
.plate p:last-child { margin-bottom: 0; }
.plate strong { color: var(--acid); }
.plate__tag {
  position: absolute;
  top: -14px;
  right: 18px;
  background: var(--acid);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 2px solid var(--ink);
  transform: rotate(1.6deg);
}

/* Alert callout for risk framing — red used sparingly */
.alert {
  border: 3px solid var(--alert);
  border-left-width: 12px;
  background: var(--paper);
  box-shadow: 6px 6px 0 var(--alert);
  padding: 22px 24px;
  margin: 30px 0;
}
.alert__label {
  display: inline-block;
  background: var(--alert);
  color: #fff;
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 11px;
  margin-bottom: 12px;
}
.alert p:last-child { margin-bottom: 0; }

/* ---------- Tables ---------- */
.table-scroll {
  overflow-x: auto;
  min-width: 0;
  max-width: 100%;
  border: var(--rule);
  box-shadow: var(--shadow);
  margin: 26px 0;
  background: var(--paper);
}
table { border-collapse: collapse; width: 100%; min-width: 560px; }
caption {
  text-align: left;
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  padding: 14px 16px;
  background: var(--ink);
  color: var(--acid);
}
th, td { padding: 13px 16px; text-align: left; vertical-align: top; border: 2px solid var(--ink); }
thead th {
  background: var(--ink);
  color: var(--paper);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
tbody tr:nth-child(even) { background: rgba(10, 10, 10, 0.04); }
tbody th { background: var(--acid); color: var(--ink); font-weight: 700; }

/* ---------- Layered defence diagram ---------- */
.layers { margin: 34px 0; }
.layers__cap {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  margin: 0 0 14px;
}
.layer {
  border: var(--rule);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  position: relative;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.layer + .layer { margin-top: 12px; }
.layer:hover,
.layer:focus-within { transform: translate(-3px, -3px); box-shadow: var(--shadow-lg); }
.layer__idx {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1;
}
.layer__name {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1rem;
  letter-spacing: -0.01em;
}
.layer__name small {
  display: block;
  font-family: var(--font-body);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.88rem;
  margin-top: 3px;
  opacity: 0.92;
}
.layer__role {
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 9px;
  border: 2px solid currentColor;
  white-space: nowrap;
}
/* alternating widths — anti-symmetry */
.layer--wide { margin-right: 0; }
.layer--inset { margin-left: 40px; }
.layer--inset2 { margin-left: 80px; }
.layer--dark { background: var(--ink); color: var(--paper); }
.layer--dark .layer__role { color: var(--acid); }
.layer--acid { background: var(--acid); color: var(--ink); }
.layer--paper { background: var(--paper); color: var(--ink); }

/* ---------- Steps ---------- */
.steps { list-style: none; counter-reset: step; margin: 26px 0; padding: 0; }
.steps li {
  counter-increment: step;
  position: relative;
  border: var(--rule);
  background: var(--paper);
  box-shadow: var(--shadow);
  padding: 18px 20px 18px 72px;
  margin-bottom: 14px;
}
.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 52px;
  background: var(--ink);
  color: var(--acid);
  font-family: var(--font-display);
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.steps li b {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1rem;
  letter-spacing: -0.01em;
  display: block;
  margin-bottom: 5px;
}
.steps li p { margin: 0; }

/* ---------- Do / don't two-column ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 28px 0;
}
.split__col { border: var(--rule); box-shadow: var(--shadow); }
.split__head {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.95rem;
  padding: 12px 16px;
  border-bottom: var(--rule);
  letter-spacing: 0.02em;
}
.split__col--yes .split__head { background: var(--acid); color: var(--ink); }
.split__col--no .split__head { background: var(--ink); color: var(--acid); }
.split__col ul { margin: 0; padding: 16px 18px 16px 38px; }
.split__col li { margin-bottom: 9px; font-size: 0.96rem; }
.split__col li:last-child { margin-bottom: 0; }

/* ---------- FAQ ---------- */
.faq { margin: 26px 0 0; }
.faq details {
  border: var(--rule);
  background: var(--paper);
  box-shadow: var(--shadow);
  margin-bottom: 14px;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.faq details[open] { box-shadow: var(--shadow-lg); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 52px 18px 18px;
  font-family: var(--font-display);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: -0.005em;
  line-height: 1.3;
  position: relative;
  min-height: 44px;
  transition: background 0.16s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 44px;
  background: var(--acid);
  color: var(--ink);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-left: 3px solid var(--ink);
}
.faq details[open] summary::after { content: "\2212"; }
.faq summary:hover { background: rgba(232, 255, 58, 0.45); }
.faq summary:active { transform: translate(2px, 2px); }
.faq__body { padding: 4px 20px 20px; border-top: 3px solid var(--ink); }
.faq__body p { margin: 14px 0 0; font-size: 0.98rem; }

/* ---------- Related links ---------- */
.related { display: grid; gap: 12px; margin: 22px 0 0; }
.related a {
  border: var(--rule);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  text-decoration: none;
  display: block;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease);
}
.related a:hover,
.related a:focus-visible {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-lg);
  background: rgba(232, 255, 58, 0.4);
}
.related__kicker {
  display: block;
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 5px;
}
.related__title { font-family: var(--font-display); font-size: 1rem; text-transform: uppercase; }

/* ---------- Footer ---------- */
.foot {
  background: var(--ink);
  color: var(--paper);
  border-top: 6px solid var(--acid);
  padding: 52px 0 34px;
  margin-top: 20px;
}
.foot__brand {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 2.2rem;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
}
.foot__brand span { background: var(--acid); color: var(--ink); padding: 0 8px; }
.foot__blurb { max-width: 62ch; opacity: 0.85; margin: 0 0 34px; }
.foot__net-title {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--acid);
  margin: 0 0 16px;
}
.linknet {
  list-style: none;
  margin: 0 0 36px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 8px;
}
.linknet a {
  color: var(--paper);
  text-decoration: none;
  border: 2px solid rgba(253, 253, 253, 0.3);
  padding: 11px 14px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.9rem;
  transition: background 0.16s var(--ease), color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.linknet a:hover,
.linknet a:focus-visible { background: var(--acid); color: var(--ink); border-color: var(--acid); }
.linknet a span {
  font-family: var(--font-display);
  font-size: 0.78rem;
  opacity: 0.7;
  flex: none;
}
.linknet a:hover span,
.linknet a:focus-visible span { opacity: 1; }
.foot__legal {
  border-top: 2px solid rgba(253, 253, 253, 0.25);
  padding-top: 22px;
  font-size: 0.86rem;
  opacity: 0.82;
}
.foot__legal p { margin: 0 0 10px; }
.foot__legal a { color: var(--acid); }

/* ---------- Reveal (JS enhancement) ----------
   Hidden state is scoped to .js so the page is fully readable with JS off. */
.js .reveal { opacity: 0; transform: translateY(22px); }
.js .reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: minmax(0, 1fr); }
  .sticker { transform: rotate(-1deg); }
  .dossier { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .toc { position: static; }
  .split { grid-template-columns: minmax(0, 1fr); }
  .layer--inset { margin-left: 20px; }
  .layer--inset2 { margin-left: 40px; }
}
@media (max-width: 640px) {
  body { font-size: 1rem; }
  .bar__in { flex-direction: column; align-items: flex-start; }
  .bar__nav { gap: 2px; }
  .bar__nav a { padding: 9px 10px; font-size: 0.72rem; }
  .layer { grid-template-columns: auto 1fr; }
  .layer__role { grid-column: 2; justify-self: start; }
  .layer--inset { margin-left: 12px; }
  .layer--inset2 { margin-left: 24px; }
  .steps li { padding-left: 60px; }
  .steps li::before { width: 44px; }
  .foot__brand { font-size: 1.7rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; }
}