/* ============================================================
   andre-uhl.de — "Engineered Grid"

   Fonts: IBM Plex (SIL Open Font License 1.1), self-hosted.
   No third-party requests are made by this page.
   ============================================================ */

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/ibm-plex-mono-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/ibm-plex-mono-500.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/ibm-plex-mono-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/ibm-plex-sans-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/ibm-plex-sans-500.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/ibm-plex-sans-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans Condensed';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/ibm-plex-sans-condensed-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans Condensed';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/ibm-plex-sans-condensed-700.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}


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

:root {
  --paper:        #F1F3F4;
  --ink:          #12181B;
  --ink-soft:     #4E5A5F;
  --line:         #CFD7DA;
  --line-strong:  #A9B6BA;
  --accent:       #0E9E43;
  --accent-mark:  #3DCD58;
  --accent-wash:  rgba(14,158,67,.07);

  --sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --cond: "IBM Plex Sans Condensed", "Arial Narrow", var(--sans);
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --max:   1180px;
  --edge:  clamp(22px, 5vw, 76px);
  --inset: clamp(18px, 2.6vw, 38px);
  --pad:   calc(var(--edge) + var(--inset));
  --gap:   clamp(28px, 5vw, 60px);

  --hatch: repeating-linear-gradient(45deg, var(--line-strong) 0 1px, transparent 1px 5px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper:       #0F1518;
    --ink:         #E7ECEE;
    --ink-soft:    #8B989E;
    --line:        #202A30;
    --line-strong: #35444B;
    --accent:      #4ED677;
    --accent-mark: #3DCD58;
    --accent-wash: rgba(78,214,119,.08);
  }
}
:root[data-theme="dark"] {
  --paper:       #0F1518;
  --ink:         #E7ECEE;
  --ink-soft:    #8B989E;
  --line:        #202A30;
  --line-strong: #35444B;
  --accent:      #4ED677;
  --accent-mark: #3DCD58;
  --accent-wash: rgba(78,214,119,.08);
}

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

body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); font-size: 16px; line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

/* ---------- sheet furniture ---------------------------------- */

.rules { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.rules-inner { height: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--edge); display: grid; }
.rules-inner span {
  border-left: 1px solid var(--line-strong); border-right: 1px solid var(--line-strong);
  transform-origin: top center;
}

.sheet-frame { position: fixed; inset: 10px; z-index: 60; pointer-events: none; border: 1px solid var(--line-strong); }
.sheet-frame::before, .sheet-frame::after {
  content: ""; position: absolute; width: 13px; height: 13px; border: 0 solid var(--ink-soft);
}
.sheet-frame::before { top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px; }
.sheet-frame::after  { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }

.xhair { position: fixed; inset: 0; z-index: 58; pointer-events: none; opacity: 0; transition: opacity .35s ease; }
.xhair.on { opacity: 1; }
.xh-v { position: absolute; top: 0; bottom: 0; left: 0; width: 1px; background: var(--line-strong); will-change: transform; }
.xh-h { position: absolute; left: 0; right: 0; top: 0; height: 1px; background: var(--line-strong); will-change: transform; }
.xh-r {
  position: absolute; left: 0; top: 0; will-change: transform;
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .09em;
  color: var(--ink-soft); background: var(--paper);
  border: 1px solid var(--line); padding: 2px 6px; white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.gauge { position: fixed; right: 26px; top: 96px; bottom: 96px; z-index: 55; width: 34px; pointer-events: none; display: none; }
.gauge-track { position: absolute; right: 6px; top: 0; bottom: 0; width: 1px; background: var(--line-strong); }
.gauge-tick  { position: absolute; right: 2px; top: 0; width: 9px; height: 14px; border-right: 2px solid var(--accent); border-top: 1px solid var(--accent); border-bottom: 1px solid var(--accent); }
.gauge-pct {
  position: absolute; right: 18px; top: 0; margin-top: -3px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .06em; color: var(--ink-soft);
  font-variant-numeric: tabular-nums; writing-mode: vertical-rl; text-orientation: sideways;
}
@media (min-width: 1360px) { .gauge { display: block; } }

.wrap { position: relative; z-index: 1; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }

/* ---------- typographic primitives --------------------------- */

.tnum { font-variant-numeric: tabular-nums; }
a { color: inherit; }

.link {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase; text-decoration: none; color: var(--ink);
  border-bottom: 1px solid var(--line-strong); padding-bottom: 3px;
  transition: color .18s ease, border-color .18s ease;
}
.link:hover, .link:focus-visible { color: var(--accent); border-color: var(--accent); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 80;
  background: var(--paper); border: 1px solid var(--accent); padding: 9px 14px;
  font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: .1em; text-decoration: none;
}
.skip:focus { left: 14px; top: 14px; }

/* ---------- header ------------------------------------------- */

header { position: sticky; top: 0; z-index: 50; background: var(--paper); border-bottom: 1px solid var(--line-strong); }
.bar { max-width: var(--max); margin: 0 auto; padding: 13px var(--pad); display: flex; align-items: center; gap: 20px; transition: padding .25s ease; }
header.condensed .bar { padding-top: 7px; padding-bottom: 7px; }
.mark { font-family: var(--cond); font-weight: 700; font-size: 15px; letter-spacing: .16em; margin-right: auto; }

nav { display: flex; gap: 18px; }
nav a {
  position: relative; font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  text-transform: uppercase; text-decoration: none; color: var(--ink-soft); transition: color .2s ease;
}
nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -5px; height: 1px;
  background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
nav a:hover, nav a:focus-visible { color: var(--accent); }
nav a.on { color: var(--ink); }
nav a.on::after { transform: scaleX(1); }

.toggle {
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-soft); background: transparent; border: 1px solid var(--line-strong);
  padding: 4px 9px; cursor: pointer; border-radius: 2px;
  transition: color .18s ease, border-color .18s ease;
}
.toggle:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 900px) { nav { display: none; } }

/* ---------- section scaffolding ------------------------------ */

section { scroll-margin-top: 64px; padding: clamp(56px, 8vw, 108px) 0; }
section + section { border-top: 1px solid var(--line-strong); }

.sheet-no { display: flex; align-items: center; gap: 13px; margin-bottom: clamp(26px, 4vw, 44px); }
.sheet-no em { width: 15px; height: 15px; border: 1px solid var(--line-strong); background-image: var(--hatch); flex: none; }
.sheet-no b { font-family: var(--cond); font-weight: 700; font-size: 13px; letter-spacing: .14em; }
.sheet-no i { font-family: var(--mono); font-style: normal; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.sheet-no u {
  flex: 1; height: 6px; text-decoration: none;
  border-top: 1px solid var(--line-strong);
  background: linear-gradient(90deg, var(--line-strong) 1px, transparent 1px) 0 0 / 24px 5px repeat-x;
  transform-origin: left center;
}

.lede { max-width: 62ch; color: var(--ink-soft); font-size: 15px; margin: 0; }
.lede + .lede { margin-top: 14px; }

/* ---------- hero --------------------------------------------- */

.hero { padding-top: clamp(44px, 6vw, 78px); }

h1 { margin: 0; font-size: clamp(3.2rem, 13vw, 8rem); line-height: .9; }
h1 .n { position: relative; display: inline-block; font-family: var(--cond); font-weight: 700; letter-spacing: -.025em; }
h1 .ext { position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s ease; }
h1 .n:hover .ext { opacity: 1; }
h1 .ext i { position: absolute; top: -14px; bottom: -22px; width: 1px; background: var(--accent); }
h1 .ext i:first-child { left: 0; }
h1 .ext i:last-of-type { right: 0; }
h1 .ext b {
  position: absolute; left: 50%; bottom: -40px; transform: translateX(-50%);
  font-family: var(--mono); font-size: 10px; font-weight: 500; letter-spacing: .1em;
  color: var(--accent); background: var(--paper); padding: 0 7px; white-space: nowrap; font-variant-numeric: tabular-nums;
}

.dim { margin: 26px 0 30px; }
.dim-line { position: relative; height: 1px; background: var(--line-strong); transform-origin: left center; }
.dim-line::before, .dim-line::after { content: ""; position: absolute; top: -5px; width: 1px; height: 11px; background: var(--line-strong); }
.dim-line::before { left: 0; }
.dim-line::after  { right: 0; }
.dim-label {
  display: block; margin-top: 9px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-soft);
}

.pitch { max-width: 54ch; font-size: 17.5px; margin: 0 0 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 22px; }

.idstrip {
  position: relative; margin: clamp(40px, 6vw, 60px) 0 0;
  display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line-strong);
}
.idstrip > div { padding: 13px 15px; border-left: 1px solid var(--line); display: grid; gap: 5px; }
.idstrip > div:first-child { border-left: 0; }
.idstrip dt { font-family: var(--mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.idstrip dd { margin: 0; font-family: var(--cond); font-weight: 600; font-size: 15.5px; line-height: 1.25; }
@media (max-width: 900px) {
  .idstrip { grid-template-columns: repeat(2, 1fr); }
  .idstrip > div:nth-child(3) { border-left: 0; }
  .idstrip > div:nth-child(n+3) { border-top: 1px solid var(--line); }
}
@media (max-width: 480px) {
  .idstrip { grid-template-columns: 1fr; }
  .idstrip > div { border-left: 0; }
  .idstrip > div + div { border-top: 1px solid var(--line); }
}

/* corner registration ticks */
.reg { position: relative; }
.reg::before, .reg::after { content: ""; position: absolute; width: 9px; height: 9px; border: 0 solid var(--ink-soft); }
.reg::before { top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px; }
.reg::after  { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }

/* ---------- metrics ------------------------------------------ */

.metrics { margin-top: 22px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line-strong); }
.metrics > div { padding: 17px 15px; border-left: 1px solid var(--line); display: grid; gap: 7px; align-content: start; }
.metrics > div:first-child { border-left: 0; }
.metrics b {
  font-family: var(--cond); font-weight: 700; font-size: clamp(1.25rem, 2.35vw, 1.7rem);
  line-height: 1.05; letter-spacing: -.015em; font-variant-numeric: tabular-nums;
  text-wrap: balance;
}
.metrics span { font-family: var(--mono); font-size: 10px; letter-spacing: .11em; text-transform: uppercase; color: var(--ink-soft); line-height: 1.5; }
@media (max-width: 900px) {
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metrics > div:nth-child(3) { border-left: 0; }
  .metrics > div:nth-child(n+3) { border-top: 1px solid var(--line); }
}
@media (max-width: 460px) {
  .metrics { grid-template-columns: 1fr; }
  .metrics > div { border-left: 0; }
  .metrics > div + div { border-top: 1px solid var(--line); }
}

/* ---------- parts list --------------------------------------- */

.plist { margin-top: 30px; border-top: 1px solid var(--line-strong); }

.prow {
  position: relative; display: grid; gap: 5px 22px;
  grid-template-columns: 74px minmax(0, 1fr);
  padding: 21px 34px 21px 0; border-bottom: 1px solid var(--line);
  transition: background .2s ease, padding-left .2s ease;
}
@media (min-width: 900px) {
  .prow { grid-template-columns: 74px minmax(0, 1fr) minmax(0, 1.35fr) 128px; align-items: baseline; }
  .p-spec { grid-column: 3; }
}
.prow::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: -1px; width: 3px;
  background-image: var(--hatch); background-color: var(--accent-wash);
  transform: scaleY(0); transform-origin: top; transition: transform .24s ease;
}
.prow:hover, .prow:focus-within { background: var(--accent-wash); padding-left: 15px; }
.prow:hover::before, .prow:focus-within::before { transform: scaleY(1); }

.p-item { font-family: var(--mono); font-size: 11.5px; letter-spacing: .06em; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.p-name { font-family: var(--cond); font-weight: 700; font-size: 23px; line-height: 1.15; }
.p-desc { color: var(--ink-soft); font-size: 14.5px; }
.p-spec { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); opacity: .85; }
.p-stat { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }

@media (max-width: 899px) {
  .p-name, .p-desc, .p-spec, .p-stat { grid-column: 2; }
  .p-item { grid-row: span 4; }
}

/* ---------- capability list ---------------------------------- */

.caps { margin: clamp(38px, 5vw, 58px) 0 0; border-top: 1px solid var(--line-strong); }
.cap { display: grid; gap: 2px 20px; grid-template-columns: 210px minmax(0, 1fr); padding: 13px 0; border-bottom: 1px solid var(--line); }
.cap dt { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.cap dd { margin: 0; font-size: 14.5px; color: var(--ink-soft); }
@media (max-width: 680px) { .cap { grid-template-columns: 1fr; } }

/* ---------- timeline ----------------------------------------- */

.tl { margin-top: 30px; }
.trow {
  position: relative; display: grid; gap: 5px 26px;
  grid-template-columns: 132px minmax(0, 1fr);
  padding: 20px 0 20px 26px; border-left: 1px solid var(--line-strong);
}
.trow::before {
  content: ""; position: absolute; left: -4px; top: 28px;
  width: 7px; height: 7px; background: var(--paper); border: 1px solid var(--line-strong);
}
.trow.now::before { background: var(--accent-mark); border-color: var(--accent-mark); }
.trow.edu { border-left-style: dashed; }
.t-year { font-family: var(--mono); font-size: 11.5px; letter-spacing: .05em; color: var(--ink-soft); font-variant-numeric: tabular-nums; padding-top: 4px; }
.t-role { font-family: var(--cond); font-weight: 700; font-size: 20px; line-height: 1.25; display: block; }
.t-org  { font-size: 14px; color: var(--ink-soft); display: block; margin-top: 2px; }
.t-note { font-size: 14.5px; margin-top: 7px; display: block; max-width: 62ch; }
@media (max-width: 680px) { .trow { grid-template-columns: 1fr; } }

/* ---------- patents ------------------------------------------ */

.pats { margin-top: 30px; display: grid; gap: 22px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 880px) { .pats { grid-template-columns: 1fr; } }

.pat { border: 1px solid var(--line-strong); padding: 22px 22px 20px; display: grid; gap: 13px; align-content: start; text-decoration: none; transition: background .2s ease; }
.pat:hover, .pat:focus-visible { background: var(--accent-wash); }
.pat-no { font-family: var(--cond); font-weight: 700; font-size: clamp(1.55rem, 3.4vw, 2.2rem); line-height: 1; letter-spacing: -.01em; }
.pat-title { font-size: 15.5px; line-height: 1.4; font-weight: 500; }
.pat-sum { margin: 0; font-size: 14px; color: var(--ink-soft); }
.pat-meta { margin: 0; display: grid; grid-template-columns: 88px minmax(0, 1fr); font-family: var(--mono); font-size: 10.5px; letter-spacing: .05em; border-top: 1px solid var(--line); }
.pat-meta dt { padding: 7px 10px 7px 0; color: var(--ink-soft); text-transform: uppercase; border-bottom: 1px solid var(--line); }
.pat-meta dd { margin: 0; padding: 7px 0; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.pat-go { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }

/* ---------- contact + title block ---------------------------- */

.contact-grid { display: grid; gap: var(--gap); grid-template-columns: minmax(0, 1fr) minmax(280px, 372px); align-items: start; }
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

.tblock { border: 1px solid var(--line-strong); }
.tblock dl { margin: 0; display: grid; grid-template-columns: 92px minmax(0, 1fr); font-family: var(--mono); font-size: 11px; letter-spacing: .05em; }
.tblock dt, .tblock dd { margin: 0; padding: 9px 12px; border-top: 1px solid var(--line); overflow-wrap: anywhere; }
.tblock dt { color: var(--ink-soft); text-transform: uppercase; border-right: 1px solid var(--line); }
.tblock dt:first-of-type, .tblock dt:first-of-type + dd { border-top: 0; }

.contact-links { display: grid; gap: 15px; margin-top: 28px; justify-items: start; }

footer { border-top: 1px solid var(--line-strong); padding: 30px 0 46px; display: flex; flex-wrap: wrap; gap: 14px 34px; align-items: center; }
footer p { margin: 0; font-family: var(--mono); font-size: 10.5px; letter-spacing: .05em; color: var(--ink-soft); }

.foot-links { display: flex; flex-wrap: wrap; gap: 18px; margin-left: auto; }
.foot-links a, .foot-links button {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-soft); text-decoration: none; background: none; border: 0; padding: 0;
  cursor: pointer; transition: color .18s ease;
}
.foot-links a:hover, .foot-links button:hover,
.foot-links a:focus-visible, .foot-links button:focus-visible { color: var(--accent); }

/* ---------- consent notice ----------------------------------- */

.consent {
  position: fixed; left: 20px; right: 20px; bottom: 20px; z-index: 70;
  max-width: 560px; margin: 0 auto;
  background: var(--paper); border: 1px solid var(--ink-soft);
  padding: 20px 22px; display: grid; gap: 13px;
  box-shadow: 0 6px 34px rgba(0,0,0,.13);
}
.consent[hidden] { display: none; }
.consent h2 {
  margin: 0; font-family: var(--mono); font-size: 10.5px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-soft);
}
.consent p { margin: 0; font-size: 14px; line-height: 1.55; }
.consent-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.btn {
  font-family: var(--mono); font-size: 11px; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; padding: 9px 16px; cursor: pointer;
  border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  transition: opacity .18s ease;
}
.btn:hover { opacity: .82; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }
.consent a { color: var(--accent); }

@media (prefers-reduced-motion: no-preference) {
  @keyframes consentIn { from { opacity: 0; transform: translateY(16px); } }
  .consent { animation: consentIn .45s cubic-bezier(.2,.75,.25,1); }
}

/* ---------- motion (opt-in only) ----------------------------- */

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }

  @keyframes rise { from { opacity: 0; transform: translateY(14px); } }
  @keyframes grow { from { transform: scaleX(0); } }
  @keyframes drop { from { transform: scaleY(0); } }
  @keyframes fade { from { opacity: 0; } }

  .rules-inner span { animation: drop 1s cubic-bezier(.3,.8,.3,1) backwards .04s; }

  h1 .n         { animation: rise .66s cubic-bezier(.2,.75,.25,1) backwards .16s; }
  .dim-line     { animation: grow .8s cubic-bezier(.3,.8,.3,1) backwards .36s; }
  .dim-label    { animation: fade .5s ease backwards .86s; }
  .pitch        { animation: rise .62s cubic-bezier(.2,.75,.25,1) backwards .42s; }
  .hero-actions { animation: rise .62s cubic-bezier(.2,.75,.25,1) backwards .52s; }
  .idstrip      { animation: rise .62s cubic-bezier(.2,.75,.25,1) backwards .60s; }
  .metrics      { animation: rise .62s cubic-bezier(.2,.75,.25,1) backwards .68s; }

  .sheet-no u { transform: scaleX(0); transition: transform .85s cubic-bezier(.3,.8,.3,1); }
  .sheet-no.seen u { transform: scaleX(1); }
}

/* ---------- legal / prose pages ------------------------------ */

.prose { max-width: 68ch; }
.prose h1 {
  font-family: var(--cond); font-weight: 700; font-size: clamp(2.1rem, 6vw, 3.2rem);
  line-height: 1.02; letter-spacing: -.02em; margin: 0 0 8px;
}
.prose .sub {
  font-family: var(--mono); font-size: 11px; letter-spacing: .13em;
  text-transform: uppercase; color: var(--ink-soft); margin: 0 0 34px;
}
.prose h2 {
  font-family: var(--cond); font-weight: 700; font-size: 19px; line-height: 1.3;
  margin: 38px 0 10px; padding-top: 16px; border-top: 1px solid var(--line);
}
.prose h2:first-of-type { border-top: 0; padding-top: 0; }
.prose h3 {
  font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-soft); margin: 22px 0 6px;
}
.prose p, .prose li { font-size: 15px; line-height: 1.68; margin: 0 0 12px; }
.prose ul { margin: 0 0 12px; padding-left: 20px; }
.prose li { margin-bottom: 5px; }
.prose a { color: var(--accent); }
.prose address { font-style: normal; margin: 0 0 12px; }
.prose .fill {
  font-family: var(--mono); font-size: 12px; letter-spacing: .04em; color: var(--ink-soft);
  border: 1px dashed var(--line-strong); border-radius: 2px; padding: 1px 7px;
  display: inline-block;
}
.prose .updated {
  margin-top: 40px; padding-top: 14px; border-top: 1px solid var(--line-strong);
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-soft);
}
[data-lang][hidden] { display: none !important; }

/* ---------- domain diagrams ---------------------------------- */

.dgrid {
  margin-top: 30px; display: grid; gap: 1px;
  grid-template-columns: repeat(auto-fill, minmax(212px, 1fr));
  background: var(--line); border: 1px solid var(--line-strong);
}
.dcard {
  background: var(--paper); padding: 18px 18px 17px;
  display: grid; gap: 11px; align-content: start;
  transition: background .2s ease;
}
.dcard:hover { background: var(--accent-wash); }
.dcard figure { margin: 0; }
.dcard svg { display: block; width: 100%; height: auto; overflow: visible; }
.dcard h3 { font-family: var(--cond); font-weight: 700; font-size: 16.5px; line-height: 1.2; margin: 0; }
.dcard p {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-soft); margin: 0; line-height: 1.5;
}

/* diagram primitives */
.d      { fill: none; stroke-linecap: round; stroke-linejoin: round; }
.ln     { stroke: var(--ink-soft); stroke-width: 1.3; }
.ac     { stroke: var(--accent); stroke-width: 1.6; }
.dash   { stroke-dasharray: 3 3.5; }
.dot    { fill: var(--ink-soft); stroke: none; }
.dotac  { fill: var(--accent); stroke: none; }
.wash   { fill: var(--accent-wash); stroke: none; }

/* ---------- domain banner image ------------------------------ */

.dbanner { margin: 26px 0 0; border: 1px solid var(--line-strong); overflow: hidden; }
.dbanner img { display: block; width: 100%; height: auto; }

/* The source image is bright; hold it back a little on the dark ground. */
:root[data-theme="dark"] .dbanner img { filter: brightness(.82) contrast(1.04); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .dbanner img { filter: brightness(.82) contrast(1.04); }
}

/* On a phone the full frame is mostly empty sky, so crop to one subject —
   the arm or the humanoid, chosen per visit. */
@media (max-width: 760px) {
  /* A taller box crops harder horizontally under object-fit:cover — at 340px
     only ~57% of the frame is visible, enough to isolate one subject. */
  .dbanner img { height: 340px; object-fit: cover; object-position: 50% 50%; }
  .dbanner.crop-arm img      { object-position: 2% 56%; }
  .dbanner.crop-humanoid img { object-position: 97% 46%; }
}