/* Shared by Home, Portfolio and Services. Palette and type: graphite / panel / fg / dim / signal,
   with a light variant (Portfolio pins the dark one in its own <style>). */
:root {
  --bg: #101317;
  --bg-2: #0d1014;
  --panel: #171b21;
  --panel-2: #1b2028;
  --fg: #e6e9ee;
  --soft: #c3cad4;
  --dim: #8994a3;
  --hair: #242a33;
  --hair-2: #2f3743;
  --signal: #5b9dff;
  --signal-ink: #0b1220;
  --signal-glow: rgba(91, 157, 255, .28);
  --lit: #1d2a3f;
  --ok: #3fb989;
  --warn: #e0a84a;
  --shadow: 0 30px 80px rgba(0, 0, 0, .35);

  --sans: system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI", Inter, Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas,
          "Roboto Mono", monospace;
  --max: 1200px;
  --gut: clamp(20px, 5vw, 48px);
  color-scheme: dark light;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7f9;
    --bg-2: #eef1f5;
    --panel: #ffffff;
    --panel-2: #f3f5f8;
    --fg: #11151b;
    --soft: #343c47;
    --dim: #5b6573;
    --hair: #dde2e8;
    --hair-2: #cdd4dd;
    --signal: #1f5fd1;
    --signal-ink: #ffffff;
    --signal-glow: rgba(31, 95, 209, .2);
    --lit: #e4edfb;
    --ok: #1d8a5f;
    --warn: #a86b10;
    --shadow: 0 30px 70px rgba(20, 30, 50, .10);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
/* line-height 1.7 or more on running text: the owner reads with astigmatism */
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* faint engineering grid behind the top of the page */
body::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 900px; z-index: -1; pointer-events: none;
  background:
    linear-gradient(var(--hair) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(90deg, var(--hair) 1px, transparent 1px) 0 0 / 56px 56px;
  opacity: .35;
  mask-image: radial-gradient(ellipse 70% 60% at 60% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 60% 0%, #000 0%, transparent 75%);
}

a { color: inherit; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, p { margin: 0; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gut); }

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 50;
  background: var(--signal); color: var(--signal-ink); padding: 10px 14px; border-radius: 6px;
  font-weight: 600; text-decoration: none;
}
.skip:focus { top: 12px; }

:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 4px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- header ---------- */
.site-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 22px 0; border-bottom: 1px solid var(--hair);
}
.brand {
  display: flex; align-items: center; gap: 11px; text-decoration: none;
  font-weight: 650; font-size: 15px; letter-spacing: .01em; white-space: nowrap;
}
.brand svg { stroke: var(--signal); flex: none; transition: transform .3s cubic-bezier(.16, .8, .3, 1); }
.brand:hover svg { transform: translateY(-2px); }
.site-nav { display: flex; align-items: center; gap: clamp(14px, 3vw, 28px); flex-wrap: wrap; }
.site-nav a {
  color: var(--dim); text-decoration: none; font-size: 14.5px;
  padding: 6px 0; transition: color .2s ease;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--fg); }
.site-nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--signal); }
.status {
  font-family: var(--mono); font-size: 11.5px; color: var(--signal);
  letter-spacing: .1em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
}
.site-nav a.status { color: var(--signal); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); flex: none; animation: beat 2.6s ease-in-out infinite; }
@keyframes beat { 0%, 100% { transform: scale(1); opacity: 1 } 50% { transform: scale(1.5); opacity: .45 } }

/* ---------- type helpers ---------- */
.eyebrow {
  font-family: var(--mono); font-size: 12.5px; color: var(--signal);
  letter-spacing: .14em; text-transform: uppercase; line-height: 1.6;
}
.kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--dim); font-weight: 400;
}
.h2 {
  font-size: clamp(28px, 4vw, 44px); line-height: 1.12; letter-spacing: -.025em; font-weight: 700;
  margin: 12px 0 0; max-width: 24ch;
}
.lead { color: var(--soft); font-size: clamp(17px, 1.6vw, 20px); line-height: 1.7; max-width: 60ch; }
.section { padding: clamp(64px, 9vw, 120px) 0 0; }
.section-head { margin-bottom: clamp(28px, 4vw, 44px); }
.section-head .lead { margin-top: 16px; }

/* ---------- hero ---------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
  gap: clamp(32px, 5vw, 72px); align-items: center;
  padding: clamp(40px, 6vw, 84px) 0 0;
}
.who-chip { display: flex; align-items: center; gap: 14px; margin-bottom: 26px; }
.who-chip img {
  width: 56px; height: 56px; border-radius: 50%; object-fit: cover; object-position: center 15%;
  border: 1px solid var(--hair-2);
}
.who-chip .who { font-size: 14.5px; line-height: 1.6; color: var(--dim); }
.who-chip .who b { display: block; color: var(--fg); font-weight: 600; font-size: 16px; }
.hero h1 {
  margin-top: 14px;
  font-size: clamp(34px, 3.7vw, 46px); line-height: 1.12; letter-spacing: -.03em; font-weight: 750;
  max-width: 24ch;
}
.hero h1 em { font-style: normal; color: var(--signal); }
.hero .line { margin-top: 22px; color: var(--soft); font-size: clamp(17px, 1.7vw, 20px); line-height: 1.7; max-width: 50ch; }

.doors { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 32px; max-width: 680px; }
.door {
  position: relative; display: flex; flex-direction: column; gap: 4px;
  padding: 15px 16px 14px; border: 1px solid var(--hair-2); border-radius: 10px;
  background: var(--panel); text-decoration: none;
  transition: border-color .25s ease, transform .25s ease, background-color .25s ease;
}
.door b { font-size: 16px; font-weight: 650; display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.door b::after { content: "→"; color: var(--signal); transition: transform .25s ease; }
.door span { font-size: 13.5px; color: var(--dim); line-height: 1.55; }
.door:hover { border-color: var(--signal); transform: translateY(-2px); }
.door:hover b::after { transform: translateX(3px); }
.door.primary { background: var(--signal); border-color: var(--signal); color: var(--signal-ink); }
.door.primary span { color: var(--signal-ink); opacity: .85; }
.door.primary b::after { color: var(--signal-ink); }
/* beside the index the hero column is narrow: the doors stack as rows */
@media (min-width: 1061px) {
  .hero .doors { grid-template-columns: 1fr; gap: 10px; max-width: 460px; }
  .hero .door { padding: 13px 16px; }
}

/* the four systems at a glance, beside the headline */
.hero-index {
  border: 1px solid var(--hair-2); border-radius: 14px; box-shadow: var(--shadow);
  background: radial-gradient(ellipse 80% 50% at 50% 0%, var(--signal-glow), transparent 70%), var(--panel);
  padding: 20px 20px 8px;
}
.hero-index .kicker { font-size: 11px; letter-spacing: .14em; padding: 0 4px 12px; border-bottom: 1px solid var(--hair); }
.hero-index ol { list-style: none; margin: 0; padding: 0; }
.hero-index li + li { border-top: 1px solid var(--hair); }
.hero-index a {
  display: grid; grid-template-columns: 34px minmax(0, 1fr); column-gap: 10px;
  padding: 15px 4px; text-decoration: none; border-radius: 8px;
}
.hero-index .i {
  grid-row: span 2; font-family: var(--mono); font-size: 12px; color: var(--dim); padding-top: 3px;
  animation: idx 10s ease-in-out infinite; animation-delay: calc(var(--i) * 2.5s);
}
.hero-index b { font-size: 16px; font-weight: 650; line-height: 1.45; transition: color .2s ease; }
.hero-index .d { font-size: 13.5px; color: var(--dim); line-height: 1.6; margin-top: 2px; }
.hero-index a:hover b { color: var(--signal); }
@keyframes idx { 0%, 22%, 100% { color: var(--dim); } 6%, 16% { color: var(--signal); } }

/* ---------- the four systems ---------- */
.syslist { display: grid; gap: clamp(20px, 3vw, 28px); }
.sys {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
  gap: clamp(24px, 4vw, 56px); align-items: center;
  border: 1px solid var(--hair-2); border-radius: 16px; background: var(--panel);
  padding: clamp(22px, 3.6vw, 44px);
}
.sys-tag {
  display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--signal); line-height: 1.6;
}
.sys-n {
  display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%;
  border: 1px solid var(--hair-2); color: var(--fg); letter-spacing: 0;
}
.sys h3 { font-size: clamp(23px, 2.5vw, 31px); letter-spacing: -.02em; line-height: 1.22; margin-top: 12px; }
.sys-sub { margin-top: 10px; font-size: 15px; color: var(--soft); line-height: 1.75; max-width: 62ch; }
.sys-sub i { font-style: normal; color: var(--dim); }
.pw { margin: 22px 0 0; display: grid; gap: 16px; }
.pw div { border-left: 2px solid var(--hair-2); padding-left: 16px; }
.pw div + div { border-left-color: var(--signal); }
.pw dt { font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--dim); line-height: 1.6; }
.pw dd { margin: 4px 0 0; font-size: 17px; line-height: 1.7; color: var(--fg); max-width: 58ch; }
.badge {
  display: inline-flex; align-items: center; margin-top: 20px;
  font-size: 13.5px; font-weight: 600; color: var(--ok); line-height: 1.4;
  border: 1px solid var(--hair-2); border-radius: 999px; padding: 6px 13px;
}
.kf {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px;
  margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--hair);
}
.kf b {
  font-family: var(--mono); font-size: clamp(28px, 3vw, 36px); font-weight: 500; color: var(--fg);
  letter-spacing: -.02em; white-space: nowrap; font-variant-numeric: tabular-nums; line-height: 1.2;
}
.kf span { flex: 1 1 220px; font-size: 15px; color: var(--soft); line-height: 1.7; }
/* a key fact said in words instead of a number, with the same visual weight */
.kf-words span { font-size: clamp(18px, 1.8vw, 21px); font-weight: 600; color: var(--fg); line-height: 1.6; max-width: 40ch; }
.origin { margin-top: 16px; font-size: 15.5px; color: var(--soft); line-height: 1.75; max-width: 60ch; }
.sys .fine { margin-top: 12px; font-size: 13.5px; color: var(--dim); line-height: 1.7; }
.sys .more {
  display: inline-block; margin-top: 18px; font-weight: 600; font-size: 15.5px;
  color: var(--signal); text-decoration: none;
}
.sys .more:hover { text-decoration: underline; text-underline-offset: 4px; }
@media (min-width: 1061px) {
  .sys:nth-child(even) > .dg-card { order: -1; }
}

/* key terms in plain words (Portfolio) */
.terms { grid-column: 1 / -1; border-top: 1px solid var(--hair); padding-top: 22px; }
.terms h4 { font-family: var(--mono); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--dim); font-weight: 400; }
.terms dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 36px; margin: 14px 0 0; }
.terms dt { font-weight: 650; font-size: 15.5px; color: var(--fg); line-height: 1.5; }
.terms dd { margin: 3px 0 0; font-size: 15px; color: var(--soft); line-height: 1.7; }

/* evidence for technical readers (Portfolio) */
.evidence { grid-column: 1 / -1; border: 1px solid var(--hair-2); border-radius: 12px; background: var(--bg-2); }
.evidence summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 15px 18px; font-family: var(--mono); font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--signal); line-height: 1.5;
}
.evidence summary::-webkit-details-marker { display: none; }
.evidence summary::after { content: "+"; font-size: 20px; line-height: 1; transition: transform .25s ease; }
.evidence[open] summary::after { transform: rotate(45deg); }
.evidence summary:hover { color: var(--fg); }
.ev-body { padding: 4px 18px 22px; border-top: 1px solid var(--hair); }
.ev-body > p, .ev-body li { font-size: 15.5px; color: var(--soft); line-height: 1.75; }
.ev-body > p { margin-top: 16px; max-width: 88ch; }
.ev-body ul { margin: 16px 0 0; padding-left: 20px; display: grid; gap: 8px; max-width: 92ch; }
.ev-body b { color: var(--fg); font-weight: 600; font-variant-numeric: tabular-nums; }

/* ---------- diagrams: one per system, CSS-animated; JS only pauses them ---------- */
.dg-card {
  margin: 0; width: 100%; max-width: 460px; justify-self: center;
  border: 1px solid var(--hair-2); border-radius: 14px;
  background: radial-gradient(ellipse 80% 45% at 50% 0%, var(--signal-glow), transparent 70%), var(--bg-2);
  padding: 12px 12px 12px;
}
.dg-top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 2px 4px 10px; border-bottom: 1px solid var(--hair); margin-bottom: 6px;
}
.dg-top .kicker { font-size: 11px; letter-spacing: .14em; }
.dg-pp {
  font: 500 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase;
  color: var(--dim); background: transparent; border: 1px solid var(--hair-2); border-radius: 999px;
  padding: 7px 11px; cursor: pointer; min-height: 30px;
}
.dg-pp:hover { color: var(--fg); border-color: var(--dim); }
.dg-card figcaption { margin: 8px 4px 0; font-size: 13px; color: var(--dim); line-height: 1.65; }

.dg { --step: 1.15s; display: block; width: 100%; height: auto; }
.dg text { font-family: var(--sans); fill: var(--fg); }
.dg .t { font-size: 15px; font-weight: 650; text-anchor: middle; }
.dg .s { font-size: 12px; fill: var(--dim); text-anchor: middle; }
.dg .m { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; fill: var(--dim); text-transform: uppercase; }
.dg .kn { font-family: var(--mono); font-size: 11px; font-weight: 600; fill: var(--dim); text-anchor: middle; }
.dg .bx { fill: var(--panel-2); stroke: var(--hair-2); stroke-width: 1.3; }
.dg .bx.hu { stroke: var(--warn); stroke-dasharray: 5 4; }
.dg .bx.end { stroke: var(--signal); stroke-width: 1.6; }
.dg .k { fill: var(--bg-2); stroke: var(--hair-2); stroke-width: 1.3; }
.dg .ws { fill: none; stroke: var(--hair-2); stroke-width: 1.2; stroke-dasharray: 4 4; }
.dg .gate { fill: var(--panel-2); stroke: var(--ok); stroke-width: 1.3; }
.dg .gate.re { stroke: var(--warn); }
.dg .gl { font-family: var(--mono); font-size: 11px; text-anchor: middle; fill: var(--ok); letter-spacing: .03em; }
.dg .gl.re { fill: var(--warn); }
.dg .cn { fill: none; stroke: var(--signal); stroke-width: 1.6; stroke-linecap: round; opacity: .5; stroke-dasharray: 4 5; }
.dg .cn.alt { stroke: var(--dim); }
.dg .cn.warn { stroke: var(--warn); }

/* the pulse: each step lights up in turn (--i = its position, --n = steps in the diagram) */
.dg .st > .bx, .dg .st > .gate {
  animation: dg-lit calc(var(--n) * var(--step)) ease-in-out infinite;
  animation-delay: calc(var(--i) * var(--step));
}
.dg .st > .k {
  animation: dg-k calc(var(--n) * var(--step)) ease-in-out infinite;
  animation-delay: calc(var(--i) * var(--step));
}
.dg .cn {
  animation: dg-flow 1.4s linear infinite, dg-cn calc(var(--n) * var(--step)) ease-in-out infinite;
  animation-delay: 0s, calc((var(--i) - .45) * var(--step));
}
@keyframes dg-lit { 0%, 15%, 100% { fill: var(--panel-2); stroke-width: 1.3; } 5%, 10% { fill: var(--lit); stroke-width: 2.2; } }
@keyframes dg-k { 0%, 15%, 100% { stroke: var(--hair-2); } 5%, 10% { stroke: var(--signal); } }
@keyframes dg-cn { 0%, 16%, 100% { opacity: .45; } 6%, 11% { opacity: 1; } }
@keyframes dg-flow { to { stroke-dashoffset: -18; } }
.dg-card.paused .dg *, .dg-card.idle .dg * { animation-play-state: paused; }

/* ---------- how I work ---------- */
.how { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; counter-reset: how; list-style: none; padding: 0; margin: 0; }
.how li { border-top: 2px solid var(--hair-2); padding-top: 16px; counter-increment: how; }
.how li::before { content: "0" counter(how); font-family: var(--mono); font-size: 12px; color: var(--signal); letter-spacing: .1em; }
.how h3 { font-size: 17px; margin: 8px 0 6px; letter-spacing: -.01em; }
.how p { font-size: 15px; color: var(--dim); line-height: 1.7; }

/* ---------- contact / hire ---------- */
.hire {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(22px, 4vw, 48px); align-items: center;
  border: 1px solid var(--hair-2); border-radius: 16px; background: var(--panel);
  padding: clamp(24px, 4vw, 48px);
}
.hire img {
  width: clamp(96px, 14vw, 156px); height: clamp(96px, 14vw, 156px); border-radius: 50%;
  object-fit: cover; object-position: center 15%; border: 1px solid var(--hair-2);
}
.hire h2 { font-size: clamp(26px, 3.4vw, 38px); letter-spacing: -.025em; line-height: 1.18; }
.hire .lead { margin-top: 12px; font-size: 17px; }
.hire dl { margin: 18px 0 0; display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; font-size: 14.5px; line-height: 1.7; }
.hire dt { font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--dim); padding-top: 3px; }
.hire dd { margin: 0; color: var(--soft); }

.btns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 46px;
  padding: 0 18px; border-radius: 8px; font-size: 15px; font-weight: 600; text-decoration: none;
  border: 1px solid var(--hair-2); color: var(--fg); background: transparent;
  transition: border-color .2s ease, transform .2s ease, filter .2s ease;
}
.btn:hover { border-color: var(--signal); transform: translateY(-1px); }
.btn.solid { background: var(--signal); border-color: var(--signal); color: var(--signal-ink); }
.btn.solid:hover { filter: brightness(1.08); }

/* ---------- footer ---------- */
.site-foot {
  margin-top: clamp(64px, 9vw, 120px); border-top: 1px solid var(--hair);
  padding: 22px 0 40px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 12px; color: var(--dim); line-height: 1.7;
}
.site-foot nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-foot a { color: var(--dim); text-decoration: none; }
.site-foot a:hover { color: var(--fg); }

/* ---------- services ---------- */
.svc-hero { padding: clamp(40px, 6vw, 84px) 0 0; max-width: 860px; }
.svc-hero h1 { font-size: clamp(36px, 5.4vw, 62px); line-height: 1.07; letter-spacing: -.035em; font-weight: 750; margin-top: 16px; }
.svc-hero h1 em { font-style: normal; color: var(--signal); }
.svc-hero .lead { margin-top: 22px; }

.ba { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.ba figure { margin: 0; border: 1px solid var(--hair-2); border-radius: 14px; background: var(--panel); padding: 18px 18px 16px; }
.ba figcaption { font-size: 15px; color: var(--soft); line-height: 1.7; margin-top: 10px; }
.ba figcaption b { color: var(--fg); }
.ba .kicker { margin-bottom: 8px; }
.ba svg { display: block; width: 100%; height: auto; max-width: 380px; margin: 0 auto; }
.ba svg text { font-family: var(--sans); fill: var(--fg); }
.ba .t { font-size: 12.5px; font-weight: 600; text-anchor: middle; }
.ba .s { font-size: 10px; fill: var(--dim); text-anchor: middle; }
.ba .q { font-family: var(--mono); font-size: 10.5px; fill: var(--warn); text-anchor: middle; }
.ba .box { fill: var(--panel-2); stroke: var(--hair-2); stroke-width: 1.2; }
.ba .box.sig { stroke: var(--signal); }
.ba .box.ok { stroke: var(--ok); }
.ba .box.hu { stroke: var(--warn); stroke-dasharray: 5 4; }
.ba .ln { fill: none; stroke: var(--dim); stroke-width: 1.3; stroke-dasharray: 3 4; }
.ba .ln.sig { stroke: var(--signal); stroke-dasharray: none; opacity: .8; }
.ba .qb { fill: var(--bg); stroke: var(--warn); stroke-width: 1; }
.ba .after-svg .ln.sig { stroke-dasharray: 5 6; animation: dash 1.2s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -22; } }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.step {
  display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: clamp(18px, 4vw, 48px);
  border: 1px solid var(--hair-2); border-radius: 14px; background: var(--panel);
  padding: clamp(22px, 3.4vw, 36px);
}
.step .n { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--signal); }
.step h3 { font-size: clamp(22px, 2.4vw, 28px); letter-spacing: -.02em; line-height: 1.22; margin-top: 8px; }
.step .opt { display: inline-block; margin-top: 10px; font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--dim); border: 1px solid var(--hair-2); border-radius: 999px; padding: 4px 9px; }
.step .body > p { color: var(--soft); font-size: 16.5px; line-height: 1.7; max-width: 64ch; }
.ticks { list-style: none; padding: 0; margin: 16px 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 26px; }
.ticks li { position: relative; padding-left: 22px; font-size: 15px; color: var(--soft); line-height: 1.65; }
.ticks li::before { content: ""; position: absolute; left: 2px; top: .58em; width: 9px; height: 5px; border-left: 2px solid var(--ok); border-bottom: 2px solid var(--ok); transform: rotate(-45deg); }
.ticks li b { color: var(--fg); font-weight: 600; }
.limits { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--hair-2); font-size: 14.5px; color: var(--dim); line-height: 1.7; }
.limits b { color: var(--soft); font-weight: 600; }
.formats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.format { border: 1px solid var(--hair-2); border-radius: 10px; padding: 16px; background: var(--panel-2); }
.format h4 { font-size: 16px; }
.format p { font-size: 14.5px; color: var(--dim); margin-top: 6px; line-height: 1.7; }

.case {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px);
  border: 1px solid var(--hair-2); border-radius: 16px; background:
    radial-gradient(ellipse 60% 70% at 100% 0%, var(--signal-glow), transparent 70%), var(--panel);
  padding: clamp(24px, 4vw, 48px);
}
.case h3 { font-size: clamp(22px, 2.6vw, 30px); letter-spacing: -.02em; line-height: 1.22; margin-top: 10px; }
.case .desc { font-family: var(--mono); font-size: 12px; color: var(--dim); margin-top: 6px; letter-spacing: .04em; }
.case p { color: var(--soft); font-size: 16px; margin-top: 16px; line-height: 1.7; }
.case .kf { margin-top: 0; padding-top: 0; border-top: 0; }
.case p.kicker { font-size: 12px; margin-top: 0; }
.case p.scope { font-size: 12px; }
.case .sys-sub { font-size: 16px; }
.case .more { color: var(--signal); font-weight: 600; text-decoration: none; }
.case .more:hover { text-decoration: underline; text-underline-offset: 4px; }
.scope { margin-top: 14px; font-family: var(--mono); font-size: 12px; color: var(--dim); line-height: 1.7; }

.own { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; list-style: none; padding: 0; margin: 0; }
.own li { border-top: 2px solid var(--signal); padding-top: 14px; }
.own h3 { font-size: 17px; }
.own p { margin-top: 6px; font-size: 15px; color: var(--dim); line-height: 1.7; }

.cta-band {
  border: 1px solid var(--signal); border-radius: 16px; padding: clamp(26px, 4.5vw, 52px);
  background: radial-gradient(ellipse 70% 90% at 0% 0%, var(--signal-glow), transparent 70%), var(--panel);
}
.cta-band h2 { font-size: clamp(26px, 3.6vw, 40px); letter-spacing: -.025em; line-height: 1.15; max-width: 24ch; }
.cta-band p { margin-top: 14px; color: var(--soft); max-width: 60ch; font-size: 16.5px; }

/* ---------- reveal on scroll (only when JS marks the page) ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.16, .8, .3, 1); }
.js .reveal.seen { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1060px) {
  .hero { grid-template-columns: 1fr; }
  .hero-index { max-width: 640px; }
  .sys { grid-template-columns: 1fr; }
  .how { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case { grid-template-columns: 1fr; }
  .step { grid-template-columns: 1fr; gap: 14px; }
}
@media (max-width: 760px) {
  body { font-size: 17px; }
  .site-head { flex-direction: column; align-items: flex-start; gap: 12px; padding: 16px 0; }
  .site-nav { gap: 18px; }
  .doors { grid-template-columns: 1fr; }
  .ba, .own, .formats, .ticks, .terms dl { grid-template-columns: 1fr; }
  .how { grid-template-columns: 1fr; }
  .hire { grid-template-columns: 1fr; }
  .hire dl { grid-template-columns: 1fr; gap: 2px; }
  .hire dd { margin-bottom: 8px; }
  .sys { padding: 22px 10px; }
  .sys-text { padding: 0 4px; }
  .dg-card { padding: 6px 2px 10px; }
  .dg-top { padding: 2px 8px 10px; }
  .dg-card figcaption { margin: 8px 8px 0; }
  /* the diagram scales down to about 0.8 on a phone: larger type keeps it readable */
  .dg .t { font-size: 17px; }
  .dg .s { font-size: 14px; }
  .pw dd { font-size: 16.5px; }
  .site-foot { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .dot, .hero-index .i, .ba .after-svg .ln.sig, .dg * { animation: none !important; }
  .dg .cn { stroke-dasharray: none; opacity: .75; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .door, .btn, .door b::after, .brand svg, .evidence summary::after { transition: none; }
  .door:hover, .btn:hover, .brand:hover svg { transform: none; }
}