/* ═══════════════════════════════════════════════════════════
   THE FILTER AI · shared stylesheet for the reference pages
   (field guide, patterns, attacks, labs, research)

   The landing page keeps its own inline copy of the base so it
   stays a single self-contained file. Everything below the
   "REFERENCE PAGES" divider is new and lives only here.

   Palette logic is unchanged from the landing page: green means
   allowed, red means blocked, amber means you were wrong about a
   real user. Colour is data, not decoration.
   ═══════════════════════════════════════════════════════════ */

:root {
  --bg:        #070b0f;
  --bg-top:    #0a1014;
  --bg-foot:   #05080b;
  --surface:   #0f1519;
  --surface-2: #161f27;
  --line:      #263340;
  --line-soft: #1a232b;
  --text:      #e8f2ee;
  --muted:     #8497a0;
  --safe:      #39ff88;
  --threat:    #ff3b5c;
  --amber:     #ffc233;
  --brand:     #2ee6a8;
  --brand-hi:  #5df0bd;
  --brand-lo:  #17c98d;
  --violet:    #b072ff;
  --on-accent: #04120c;
  --glow:      rgba(46,230,168,.11);
  --shadow:      0 34px 92px -42px rgba(0,0,0,.96);
  --shadow-soft: 0 20px 60px -34px rgba(0,0,0,.9);
  --inner-top:   inset 0 1px 0 rgba(255,255,255,.045);
  --read:      #aebcc4;   /* body copy. 10.1:1 on the page ground, where
                             --muted at 6.5:1 was too dim to read for long */
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 5.5rem; }
@media (max-width: 620px) { html { scroll-padding-top: 7.5rem; } }

body {
  margin: 0;
  background-color: var(--bg);
  background-image: linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 46%, var(--bg-foot) 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: clamp(16.5px, 1.6vw, 18px);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed; inset: -20% -20% auto -20%; height: 70vh;
  background: radial-gradient(60% 60% at 50% 0%, var(--glow), transparent 70%);
  pointer-events: none; z-index: 0;
}
/* Static graph paper. It used to drift, which put constant motion behind
   every line of text at roughly the spatial frequency of the letterforms —
   the worst place to put movement. The node field that also moved has been
   dropped from the reading pages entirely; it now runs on the landing page
   only, so nothing on a page you actually read moves at all. */
body::after {
  content: "";
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(46,230,168,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,230,168,.022) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none; z-index: 0;
}

.wrap   { width: min(1080px, 100% - 2.5rem); margin-inline: auto; position: relative; z-index: 1; }
.narrow { width: min(760px, 100% - 2.5rem); margin-inline: auto; }

/* ── Type ─────────────────────────────────────────────── */
h1, h2, h3, h4 { font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif; font-weight: 700; letter-spacing: -.028em; line-height: 1.06; margin: 0; }
h1 { font-size: clamp(2rem, 5.2vw, 3.2rem); letter-spacing: -.034em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.15rem); }
h3 { font-size: clamp(1.02rem, 1.9vw, 1.16rem); letter-spacing: -.014em; line-height: 1.28; }
h4 { font-size: .97rem; letter-spacing: -.01em; }
p  { margin: 0 0 1.05rem; }
a  { color: inherit; }

.eyebrow {
  font-family: var(--mono);
  font-size: .69rem; font-weight: 700; letter-spacing: .21em;
  text-transform: uppercase; color: var(--muted);
  display: flex; align-items: center; gap: .75rem; margin-bottom: 1.3rem;
}
.eyebrow::after { content: ""; height: 1px; flex: 1; background: linear-gradient(90deg, var(--line), transparent); }

.lede { font-size: clamp(1.02rem, 2vw, 1.16rem); line-height: 1.62; color: var(--muted); max-width: 62ch; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--brand); color: var(--on-accent);
  padding: .8rem 1.2rem; border-radius: 0 0 10px 0; font-weight: 600;
}
.skip:focus { left: 0; }

/* ── Nav ──────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(16px) saturate(130%);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line-soft);
  box-shadow: 0 1px 0 rgba(255,255,255,.02);
}
.nav-in { display: flex; align-items: center; gap: 1rem; padding: .82rem 0; }

.brand { text-decoration: none; display: flex; align-items: center; gap: .58rem; flex: none; }
.brand .mark { width: 21px; height: 21px; flex: none; color: var(--brand); filter: drop-shadow(0 0 9px rgba(46,230,168,.28)); }
.brand .wordmark {
  font-family: var(--mono); font-weight: 700; font-size: .82rem;
  letter-spacing: .15em; text-transform: uppercase; line-height: 1;
  display: inline-flex; align-items: baseline; gap: .42em;
}
.brand .wordmark .ai { color: var(--brand); }
.brand .lo { font-weight: 400; letter-spacing: .1em; font-size: .93em; color: var(--muted); }
@media (max-width: 900px) { .brand .lo { display: none; } }
@media (hover: hover) { .brand:hover .mark { filter: drop-shadow(0 0 12px rgba(46,230,168,.45)); } }

/* Section links. They scroll sideways on a phone rather than wrapping the bar
   onto a second line, so the sticky header keeps one fixed height. */
.nav-links {
  display: flex; align-items: center; gap: .15rem;
  margin-right: auto; overflow-x: auto; scrollbar-width: none;
  -webkit-overflow-scrolling: touch; padding: .2rem 0;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  font-family: var(--mono); font-size: .7rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted); text-decoration: none;
  padding: .45rem .62rem; border-radius: 7px; white-space: nowrap;
  transition: color .14s, background .14s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.035); }
.nav-links a[aria-current="page"] { color: var(--brand); background: color-mix(in srgb, var(--brand) 9%, transparent); }
/* Phone: the bar becomes two rows rather than hiding the sections.
   Brand and buy button hold row one, every section link sits on row two
   and scrolls sideways, with a fade on the right edge so it is visible
   that more exists past the cut. */
@media (max-width: 620px) {
  .nav-in { flex-wrap: wrap; gap: .6rem; padding: .7rem 0 .5rem; }
  .brand { margin-right: auto; }
  .nav-links {
    order: 3; width: 100%; margin-right: 0;
    padding-top: .45rem; border-top: 1px solid var(--line-soft);
    -webkit-mask-image: linear-gradient(90deg, #000 88%, transparent);
            mask-image: linear-gradient(90deg, #000 88%, transparent);
  }
  .nav-links a { font-size: .68rem; padding: .38rem .5rem; }
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-weight: 600; font-size: .96rem; letter-spacing: -.004em; text-decoration: none;
  padding: .84rem 1.5rem; border-radius: 11px; border: 1px solid transparent; cursor: pointer;
  transition: transform .12s ease, filter .15s ease, border-color .15s, background .15s, box-shadow .18s ease;
  line-height: 1.2;
}
.btn-primary {
  background: linear-gradient(180deg, var(--brand-hi) 0%, var(--brand) 48%, var(--brand-lo) 100%);
  color: var(--on-accent);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.38), inset 0 -1px 0 rgba(0,0,0,.16), 0 12px 34px -18px rgba(46,230,168,.85);
}
.btn-primary:hover {
  filter: brightness(1.05); transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.5), inset 0 -1px 0 rgba(0,0,0,.16), 0 18px 46px -18px rgba(46,230,168,.95);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: linear-gradient(180deg, rgba(255,255,255,.022), transparent);
  color: var(--text); border-color: var(--line);
}
.btn-ghost:hover {
  border-color: color-mix(in srgb, var(--brand) 34%, var(--line));
  background: linear-gradient(180deg, rgba(46,230,168,.06), transparent);
  transform: translateY(-1px);
}
.btn-sm { padding: .58rem 1.05rem; font-size: .87rem; border-radius: 9px; }
.btn-lg { padding: 1.02rem 2rem; font-size: 1.04rem; }
.btn .price { font-family: var(--mono); font-weight: 700; }
.nav .btn { flex: none; }

:where(a, button, [tabindex], summary):focus-visible {
  outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 6px;
}

section { padding: clamp(3.2rem, 6.4vw, 5rem) 0; position: relative; z-index: 1; }
.rule { border: 0; border-top: 1px solid var(--line-soft); margin: 0; }

/* ── Footer ───────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--line-soft);
  padding: 2rem 0 2.6rem;
  font-family: var(--mono); font-size: .72rem; letter-spacing: .05em; color: var(--muted);
}
.foot-in { display: flex; flex-wrap: wrap; gap: .9rem 1.4rem; align-items: center; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); }
.foot-in .sp { margin-left: auto; }

/* ── Reveal ───────────────────────────────────────────── */
.rv { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.rv.in { opacity: 1; transform: none; }


/* ═══════════════════════════════════════════════════════
   REFERENCE PAGES
   Everything below is specific to the guide, the pattern
   library, the attack index, the labs and the source desk.
   ═══════════════════════════════════════════════════════ */

/* ── Page head ────────────────────────────────────────── */
.crumb {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted);
  display: flex; align-items: center; gap: .5rem; margin-bottom: 1.15rem;
}
.crumb a { text-decoration: none; color: var(--muted); }
.crumb a:hover { color: var(--brand); }
.crumb .sep { opacity: .45; }

.pagehead { padding: clamp(2.6rem, 5vw, 4rem) 0 clamp(1.6rem, 3vw, 2.4rem); }
.pagehead h1 + .lede { margin-top: 1.15rem; }

/* Stamp line: what this page is, how big it is, when it was last read over.
   Honest metadata beats a badge that just says "updated". */
.stamp {
  display: flex; flex-wrap: wrap; gap: .5rem .55rem; margin-top: 1.5rem;
}
.stamp span {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .07em;
  text-transform: uppercase; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: .26rem .68rem;
}
.stamp span b { color: var(--text); font-weight: 600; }

/* ── Contents rail ────────────────────────────────────── */
/* Grid and flex children default to min-width:auto, which means they
   refuse to shrink below their own content. A 640px-wide table sitting
   inside .body therefore forced the whole column wider than a phone
   screen — and because body carries overflow-x:hidden, the excess was
   clipped instead of scrolled. That is why every page with a table or a
   diagram looked cut off on mobile, and the two without one did not.
   These min-width:0 declarations let the column shrink so the scroll
   boxes inside it can do their job. */
.doc > *, .body, .body > section, .figscroll, .tablewrap { min-width: 0; }
.body { overflow-wrap: break-word; }
.atk .row > dt, .atk .row > dd { min-width: 0; }
.atk .rows { margin: .95rem 0 0; }

.doc { display: grid; gap: 2.4rem; align-items: start; }
@media (min-width: 1000px) { .doc { grid-template-columns: 208px 1fr; gap: 3.2rem; } }

.toc { display: none; }
@media (min-width: 1000px) {
  .toc {
    display: block; position: sticky; top: 5.2rem;
    max-height: calc(100vh - 7rem); overflow-y: auto;
    border-left: 1px solid var(--line-soft); padding-left: 1.1rem;
  }
}
.toc p {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--muted); margin: 0 0 .85rem;
}
.toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: .1rem; counter-reset: toc; }
.toc a {
  display: block; text-decoration: none; color: var(--muted);
  font-size: .82rem; line-height: 1.35; padding: .34rem 0;
  border-left: 2px solid transparent; margin-left: -1.1rem; padding-left: 1.1rem;
  transition: color .14s, border-color .14s;
}
.toc a:hover { color: var(--text); }
.toc a.on { color: var(--brand); border-left-color: var(--brand); }

/* ── Document body ────────────────────────────────────── */
.body > section { padding: 0 0 clamp(2.6rem, 5vw, 3.6rem); }
.body > section + section { border-top: 1px solid var(--line-soft); padding-top: clamp(2.6rem, 5vw, 3.4rem); }
.body h2 { margin-bottom: .95rem; scroll-margin-top: 5.5rem; }
.body h3 { margin: 2rem 0 .6rem; }
.body p { color: var(--read); max-width: 72ch; line-height: 1.75; }
.body p strong, .body li strong { color: var(--text); font-weight: 600; }
.body ul, .body ol { color: var(--read); max-width: 72ch; padding-left: 1.15rem; margin: 0 0 1.05rem; line-height: 1.72; }
.body li { margin-bottom: .5rem; }
.body a:not(.btn) { color: var(--brand); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--brand) 32%, transparent); }
.body a:not(.btn):hover { border-bottom-color: var(--brand); }
.sec-n {
  font-family: var(--mono); font-size: .66rem; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase; color: var(--brand);
  display: block; margin-bottom: .55rem;
}

/* ── Callouts ─────────────────────────────────────────── */
.note {
  border: 1px solid var(--line); border-left-width: 2px;
  border-radius: 0 12px 12px 0; padding: 1.05rem 1.15rem;
  background: var(--surface); margin: 1.6rem 0; max-width: 72ch;
}
.note p:last-child { margin-bottom: 0; }
.note .lbl {
  font-family: var(--mono); font-size: .64rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase; margin-bottom: .45rem; color: var(--muted);
}
.note.key   { border-left-color: var(--brand);  } .note.key .lbl   { color: var(--brand); }
.note.warn  { border-left-color: var(--threat); } .note.warn .lbl  { color: var(--threat); }
.note.trap  { border-left-color: var(--amber);  } .note.trap .lbl  { color: var(--amber); }

/* ── Layer stack (01–07) ──────────────────────────────────
   Flex, not grid. The earlier grid gave the number a row span and
   auto-sized its column, so a fourth sibling dropped into column one
   and stretched the rail to the width of a paragraph. A fixed rail
   plus a body that owns every child cannot do that. */
.layers { display: grid; gap: .7rem; margin: 2rem 0; }
.layer {
  display: flex; align-items: stretch; gap: 1rem;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 13px; padding: 1.1rem 1.15rem;
}
.layer .n {
  flex: none; width: 2.1rem; padding-right: 1rem;
  border-right: 1px solid var(--line-soft);
  font-family: var(--mono); font-weight: 700; font-size: 1.15rem;
  letter-spacing: -.02em; color: var(--brand); line-height: 1.15;
}
.layer-body { flex: 1 1 auto; min-width: 0; }
.layer h3 { margin: 0 0 .3rem; }
.layer p { margin: 0; font-size: .95rem; color: var(--read); max-width: none; }
.layer .parts {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .04em;
  color: var(--muted); margin-top: .7rem; display: flex; flex-wrap: wrap; gap: .35rem;
}
.layer .parts span { border: 1px solid var(--line-soft); border-radius: 5px; padding: .12rem .42rem; }
.layer .edge {
  margin-top: .75rem; padding-top: .6rem; border-top: 1px dashed var(--line);
  font-size: .89rem; color: var(--read); line-height: 1.62;
}
.layer .edge b { color: var(--text); font-weight: 600; }
@media (max-width: 560px) {
  .layer { gap: .8rem; }
  .layer .n { width: 1.7rem; padding-right: .7rem; font-size: 1rem; }
}

/* ── Figures ──────────────────────────────────────────────
   SVG diagrams. Colour carries meaning here exactly as it does
   everywhere else: green is content you authored, red arrived from
   outside, amber is mixed and needs a decision. */
.fig {
  margin: 1.8rem 0; padding: 1.25rem 1.1rem 1rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
}
/* A 760-unit diagram scaled into a 300px phone renders its labels at
   about 4px. So the svg keeps a floor width and the box around it
   scrolls, exactly as the wide tables do. On any screen wider than the
   floor, width:100% wins and nothing scrolls. */
.figscroll { overflow-x: auto; overflow-y: hidden; }
.fig svg { display: block; width: 100%; min-width: 700px; height: auto; }
@media (max-width: 760px) {
  .figscroll {
    -webkit-mask-image: linear-gradient(90deg, #000 92%, transparent);
            mask-image: linear-gradient(90deg, #000 92%, transparent);
  }
  .fig figcaption::before {
    content: "Scroll the diagram sideways to see all of it \2192";
    display: block; margin-bottom: .6rem;
    font-family: var(--mono); font-size: .64rem; letter-spacing: .1em;
    text-transform: uppercase; color: var(--brand);
  }
  .tablewrap { position: relative; }
  .tablewrap::after {
    content: "Scroll sideways \2192";
    position: sticky; left: 0; display: block;
    padding: .5rem .95rem 0; font-family: var(--mono); font-size: .62rem;
    letter-spacing: .1em; text-transform: uppercase; color: var(--brand);
  }
}
.fig figcaption {
  margin-top: 1rem; padding-top: .8rem; border-top: 1px dashed var(--line);
  font-size: .89rem; line-height: 1.62; color: var(--read);
}
.fig figcaption b { color: var(--text); font-weight: 600; }
.figkey {
  display: flex; flex-wrap: wrap; gap: .45rem .9rem; margin-bottom: 1rem;
  font-family: var(--mono); font-size: .62rem; letter-spacing: .08em; text-transform: uppercase;
}
.figkey span { display: inline-flex; align-items: center; gap: .4rem; color: var(--muted); }
.figkey i { width: 9px; height: 9px; border-radius: 2px; flex: none; }

/* ── Tables ───────────────────────────────────────────── */
.tablewrap { overflow-x: auto; margin: 1.7rem 0; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; min-width: 640px; font-size: .93rem; }
thead th {
  text-align: left; font-family: var(--mono); font-weight: 700;
  font-size: .63rem; letter-spacing: .11em; text-transform: uppercase; color: var(--muted);
  padding: .8rem .95rem; border-bottom: 1px solid var(--line); background: var(--surface-2);
  white-space: nowrap;
}
tbody td { padding: .88rem .95rem; border-bottom: 1px solid var(--line-soft); color: var(--read); vertical-align: top; line-height: 1.6; }
tbody tr:last-child td { border-bottom: 0; }
tbody td:first-child { color: var(--text); font-weight: 600; }
td .id, .idcode {
  font-family: var(--mono); font-size: .7rem; font-weight: 700;
  letter-spacing: .05em; color: var(--brand);
}

/* ── Code / payload boxes ─────────────────────────────── */
.codebox {
  background: var(--surface-2); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: .85rem .95rem; margin: 1rem 0;
  font-family: var(--mono); font-size: .84rem; line-height: 1.7;
  color: var(--read); overflow-x: auto; white-space: pre-wrap; word-break: break-word;
}
.codebox .hl { background: color-mix(in srgb, var(--threat) 22%, transparent); color: var(--text); border-radius: 3px; padding: 0 2px; }
.codebox .ok { color: var(--safe); }
.codebox .cm { color: color-mix(in srgb, var(--muted) 62%, transparent); }


code {
  font-family: var(--mono); font-size: .85em;
  background: var(--surface-2); border: 1px solid var(--line-soft);
  border-radius: 5px; padding: .08em .38em; color: var(--text);
}
.body a code { color: var(--brand); }

/* ── Card grids (hub, patterns, tools) ────────────────── */
.grid { display: grid; gap: .9rem; }
@media (min-width: 700px)  { .grid.two   { grid-template-columns: 1fr 1fr; } }
@media (min-width: 700px)  { .grid.three { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .grid.three { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 13px; padding: 1.25rem 1.2rem;
  display: flex; flex-direction: column; gap: .45rem;
  text-decoration: none; color: inherit;
  transition: border-color .16s, transform .16s, background .16s;
}
a.card:hover {
  border-color: color-mix(in srgb, var(--brand) 40%, var(--line));
  background: linear-gradient(180deg, color-mix(in srgb, var(--brand) 3%, var(--surface)), var(--surface) 60%);
  transform: translateY(-2px);
}
.card .kicker {
  font-family: var(--mono); font-size: .64rem; font-weight: 700;
  letter-spacing: .13em; text-transform: uppercase; color: var(--brand);
}
.card h3 { font-size: 1.05rem; }
.card p { margin: 0; font-size: .93rem; color: var(--read); max-width: none; }
.card .meta {
  margin-top: auto; padding-top: .8rem;
  font-family: var(--mono); font-size: .64rem; letter-spacing: .06em;
  text-transform: uppercase; color: var(--muted);
  display: flex; align-items: center; gap: .45rem;
}
.card .meta .arrow { margin-left: auto; color: var(--brand); font-size: .85rem; }

/* ── Pattern entries ──────────────────────────────────── */
.tier {
  font-family: var(--mono); font-size: .6rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  border: 1px solid var(--line); border-radius: 999px; padding: .2rem .55rem;
  color: var(--muted); white-space: nowrap;
}
.tier.t1 { color: var(--safe);   border-color: color-mix(in srgb, var(--safe) 42%, var(--line)); }
.tier.t2 { color: var(--brand);  border-color: color-mix(in srgb, var(--brand) 42%, var(--line)); }
.tier.t3 { color: var(--amber);  border-color: color-mix(in srgb, var(--amber) 42%, var(--line)); }
.tier.t4 { color: var(--violet); border-color: color-mix(in srgb, var(--violet) 42%, var(--line)); }

.pattern {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; padding: 1.45rem 1.35rem; margin-bottom: 1rem;
  scroll-margin-top: 5.5rem;
}
.pattern > header { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin-bottom: .7rem; }
.pattern > header .idcode { margin-right: .1rem; }
.pattern > header h3 { flex: 1 1 14ch; margin: 0; }
.pattern > p:first-of-type { color: var(--text); font-size: .95rem; }

/* Stops / does not stop / cost, as a three-way split so the tradeoff is
   never hidden behind the benefit. */
.tradeoff { display: grid; gap: .75rem; margin: 1.1rem 0 .3rem; }
@media (min-width: 760px) { .tradeoff { grid-template-columns: repeat(3, 1fr); } }
.tradeoff div {
  background: var(--surface-2); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: .8rem .85rem;
}
.tradeoff .lbl {
  font-family: var(--mono); font-size: .6rem; font-weight: 700;
  letter-spacing: .11em; text-transform: uppercase; margin-bottom: .35rem; display: block;
}
.tradeoff .stops   .lbl { color: var(--safe); }
.tradeoff .misses  .lbl { color: var(--threat); }
.tradeoff .costs   .lbl { color: var(--amber); }
.tradeoff p { margin: 0; font-size: .9rem; line-height: 1.62; color: var(--read); max-width: none; }

/* ── Attack entries ───────────────────────────────────── */
.filters { display: flex; flex-wrap: wrap; gap: .4rem; margin: 1.8rem 0 1.6rem; }
.chip {
  font-family: var(--mono); font-size: .66rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  background: var(--surface); border: 1px solid var(--line); color: var(--muted);
  border-radius: 999px; padding: .4rem .82rem; cursor: pointer;
  transition: border-color .14s, color .14s, background .14s;
}
.chip:hover { color: var(--text); }
.chip[aria-pressed="true"] {
  color: var(--on-accent); background: var(--brand); border-color: var(--brand);
}
.atk {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 13px; padding: 1.3rem 1.25rem; margin-bottom: .85rem;
  scroll-margin-top: 5.5rem;
}
.atk[hidden] { display: none; }
.atk > header { display: flex; flex-wrap: wrap; align-items: baseline; gap: .55rem; margin-bottom: .55rem; }
.atk > header h3 { flex: 1 1 16ch; margin: 0; }
.atk .via {
  font-family: var(--mono); font-size: .6rem; letter-spacing: .09em; text-transform: uppercase;
  border: 1px solid var(--line); border-radius: 999px; padding: .18rem .55rem; color: var(--muted);
}
.atk > p { font-size: .95rem; color: var(--read); margin-bottom: .6rem; }
.atk .rows { display: grid; gap: .55rem; margin-top: .95rem; }
.atk .row { display: grid; gap: .12rem .8rem; grid-template-columns: 8.5rem 1fr; align-items: start; }
@media (max-width: 620px) { .atk .row { grid-template-columns: 1fr; } }
.atk .row dt {
  font-family: var(--mono); font-size: .61rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted); padding-top: .2rem;
}
.atk .row dd { margin: 0; font-size: .93rem; line-height: 1.62; color: var(--read); }
.atk .row.tell dt { color: var(--brand); }
.atk .row.trap dt { color: var(--amber); }

/* ── Source desk ──────────────────────────────────────────
   Flex for the same reason .layer is: the grade badge used to span
   three rows of a two-column grid while each entry has four siblings,
   so the fourth dropped into the auto-sized column and stretched it. */
.sources { display: grid; gap: .7rem; margin: 1.8rem 0; }
.src {
  display: flex; align-items: flex-start; gap: .95rem;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 1.05rem 1.15rem;
}
.grade {
  flex: none;
  font-family: var(--mono); font-weight: 700; font-size: .72rem;
  width: 1.9rem; height: 1.9rem; border-radius: 8px;
  display: grid; place-items: center;
  border: 1px solid var(--line); color: var(--muted);
}
.grade.a { color: var(--safe);   border-color: color-mix(in srgb, var(--safe) 45%, var(--line));   background: color-mix(in srgb, var(--safe) 8%, transparent); }
.grade.b { color: var(--brand);  border-color: color-mix(in srgb, var(--brand) 45%, var(--line));  background: color-mix(in srgb, var(--brand) 8%, transparent); }
.grade.c { color: var(--amber);  border-color: color-mix(in srgb, var(--amber) 45%, var(--line));  background: color-mix(in srgb, var(--amber) 8%, transparent); }
.src-body { flex: 1 1 auto; min-width: 0; }
.src h3 { font-size: .99rem; margin: 0 0 .1rem; }
.src h3 a { text-decoration: none; }
.src .who { font-family: var(--mono); font-size: .64rem; letter-spacing: .06em; color: var(--muted); text-transform: uppercase; margin-bottom: .45rem; }
.src p { margin: 0 0 .4rem; font-size: .93rem; color: var(--read); max-width: none; line-height: 1.68; }
.src .limit { margin-bottom: 0; margin-top: .55rem; padding-top: .5rem; font-size: .89rem; color: var(--read); border-top: 1px dashed var(--line); line-height: 1.62; }
.src .limit b { color: var(--amber); font-weight: 600; }

/* ── Flowing diagrams ─────────────────────────────────────
   A short bright pulse travelling each arrow, so direction of flow is
   something you watch rather than something you infer. pathLength="100"
   normalises every path so they all move at one speed regardless of
   length. Only runs while the figure is on screen. */
@keyframes figflow { from { stroke-dashoffset: 100; } to { stroke-dashoffset: 0; } }
.fig .flow {
  stroke-dasharray: 6 94; stroke-dashoffset: 100;
  stroke-linecap: round; opacity: 0;
}
.fig.live .flow { opacity: .95; animation: figflow 3s linear infinite; }
@media (prefers-reduced-motion: reduce) {
  .fig.live .flow { animation: none; opacity: 0; }
}

/* ── Labs ─────────────────────────────────────────────── */
.tool {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 15px; overflow: hidden; margin: 1.8rem 0;
  box-shadow: var(--shadow-soft); scroll-margin-top: 5.5rem;
}
.tool-bar {
  display: flex; align-items: center; gap: .6rem; padding: .78rem 1.1rem;
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface-2) 90%, #ffffff 10%), var(--surface-2));
  box-shadow: var(--inner-top); border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: .67rem; letter-spacing: .13em;
  text-transform: uppercase; color: var(--muted);
}
.pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--brand); flex: none; animation: pulse 2.4s ease-out infinite; }
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--brand) 55%, transparent); }
  70%  { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.tool-bar .right { margin-left: auto; }
.tool-body { padding: 1.2rem 1.15rem 1.3rem; }
.tool-body > p:first-child { margin-top: 0; }

textarea, input[type="number"], select {
  width: 100%; background: var(--surface-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px;
  padding: .7rem .8rem; font-family: var(--mono); font-size: .82rem; line-height: 1.6;
}
textarea { min-height: 148px; resize: vertical; }
label {
  display: block; font-family: var(--mono); font-size: .62rem; font-weight: 700;
  letter-spacing: .11em; text-transform: uppercase; color: var(--muted); margin-bottom: .4rem;
}
.field { margin-bottom: .95rem; }
.fieldrow { display: grid; gap: .8rem; }
@media (min-width: 640px) { .fieldrow { grid-template-columns: repeat(4, 1fr); } }
.toolactions { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: .3rem; }

.findings { margin-top: 1.2rem; display: grid; gap: .55rem; }
.finding {
  border: 1px solid var(--line); border-left-width: 2px; border-radius: 0 10px 10px 0;
  padding: .78rem .9rem; background: var(--surface-2);
}
.finding.hi { border-left-color: var(--threat); }
.finding.md { border-left-color: var(--amber); }
.finding.lo { border-left-color: var(--brand); }
.finding.none { border-left-color: var(--safe); }
.finding h4 { font-size: .89rem; margin-bottom: .25rem; display: flex; flex-wrap: wrap; gap: .5rem; align-items: baseline; }
.finding .sev {
  font-family: var(--mono); font-size: .58rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
}
.finding.hi   .sev { color: var(--threat); }
.finding.md   .sev { color: var(--amber); }
.finding.lo   .sev { color: var(--brand); }
.finding.none .sev { color: var(--safe); }
.finding p { margin: 0; font-size: .9rem; color: var(--read); max-width: none; line-height: 1.62; }
.finding .ev {
  display: block; margin-top: .45rem; font-family: var(--mono); font-size: .74rem;
  color: var(--text); background: var(--bg); border: 1px solid var(--line-soft);
  border-radius: 6px; padding: .35rem .5rem; overflow-x: auto; white-space: pre-wrap; word-break: break-all;
}
.finding .ev mark { background: color-mix(in srgb, var(--threat) 30%, transparent); color: var(--text); border-radius: 2px; }

.readout { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; margin-top: 1.1rem; }
@media (min-width: 640px) { .readout { grid-template-columns: repeat(4, 1fr); } }
.readout div { background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: .75rem .6rem; text-align: center; }
.readout .n { font-family: var(--mono); font-weight: 700; font-size: 1.3rem; display: block; line-height: 1.2; }
.readout .k { font-family: var(--mono); font-size: .56rem; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.readout .good .n { color: var(--safe); }
.readout .bad  .n { color: var(--threat); }
.readout .warn .n { color: var(--amber); }
.readout .neutral .n { color: var(--text); }
.verdictline { margin-top: 1rem; font-size: .95rem; color: var(--read); }
.verdictline b { color: var(--text); }

/* ── FAQ ──────────────────────────────────────────────── */
.faq { margin-top: 1.6rem; display: grid; gap: .6rem; max-width: 72ch; }
details { background: var(--surface); border: 1px solid var(--line); border-radius: 11px; padding: 0 1.1rem; }
details[open] { border-color: color-mix(in srgb, var(--brand) 32%, var(--line)); }
summary {
  cursor: pointer; list-style: none; padding: 1rem 0;
  font-family: "IBM Plex Sans", system-ui, sans-serif; font-weight: 600; font-size: .98rem;
  display: flex; align-items: center; gap: .75rem; color: var(--text);
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; margin-left: auto; color: var(--muted); font-family: var(--mono); font-size: 1.05rem; flex: none; }
details[open] summary::after { content: "\2212"; color: var(--brand); }
details p { font-size: .96rem; color: var(--read); margin: 0 0 1rem; line-height: 1.7; }

/* ── End-of-page next steps ───────────────────────────── */
.nextup {
  border-top: 1px solid var(--line-soft);
  padding: clamp(2.4rem, 5vw, 3.4rem) 0 clamp(3rem, 6vw, 4.4rem);
}
.cta-band {
  background: linear-gradient(180deg, color-mix(in srgb, var(--brand) 4%, var(--surface)), var(--surface) 55%);
  border: 1px solid color-mix(in srgb, var(--brand) 30%, var(--line));
  border-radius: 16px; padding: 1.8rem 1.6rem; margin-top: 1.4rem;
  box-shadow: var(--inner-top);
}
.cta-band h3 { font-size: 1.2rem; margin-bottom: .5rem; }
.cta-band p { color: var(--read); font-size: .97rem; max-width: 60ch; }
.cta-band .acts { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.2rem; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; }
}