/* sandpaper.sh — AS-BUILT: an engineering-drawing system.
   Cyanotype blueprint (deep prussian, drafting grid, crop marks, a red inspection stamp),
   condensed grotesk display. The brain is the as-built drawing set of your repo;
   this page dresses like one. No serif, no cream, no terracotta. */

:root{
  --bp-deep:#0E2C50;      /* the blueprint — hero + bookend */
  --bp-deeper:#0A2140;    /* field inside cards on blue */
  --bp:#1C5085;           /* working blue on light */
  --ink:#18293E;          /* body text on light (dark blue-gray, not black) */
  --sheet:#F3F6F9;        /* cool drafting paper */
  --sheet-2:#E7EEF4;      /* tint band */
  --white:#FCFDFE;
  --stamp:#C63B2F;        /* the inspection stamp */
  --stamp-text:#AF3227;   /* red for large text on light */
  --mute:#54687D;         /* muted on light — AA at 15px+ */
  --mute-bp:#8FAAC6;      /* muted on blueprint */
  --line:rgba(28,80,133,.22);
  --line-soft:rgba(28,80,133,.10);
  --line-bp:rgba(243,246,249,.22);
  --line-bp-soft:rgba(243,246,249,.10);
  --font-d:"Archivo",system-ui,sans-serif;
  --font-b:"Archivo",system-ui,sans-serif;
  --font-m:"JetBrains Mono",ui-monospace,monospace;
  --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--sheet);color:var(--ink);font-family:var(--font-b);
  font-size:16.5px;line-height:1.66;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  font-variation-settings:"wdth" 100}
a{color:inherit}
code{font-family:var(--font-m);font-size:.84em;background:rgba(28,80,133,.09);padding:.14em .4em;border-radius:2px;white-space:nowrap}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}

/* drafting grid — laid on the surfaces, never noisy */
.grain{position:relative;isolation:isolate}
.grain::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background:
    repeating-linear-gradient(0deg,transparent 0 39px,var(--line-bp-soft) 39px 40px),
    repeating-linear-gradient(90deg,transparent 0 39px,var(--line-bp-soft) 39px 40px)}
.grain>*{position:relative;z-index:1}

/* condensed display voice */
.disp{font-family:var(--font-d);font-variation-settings:"wdth" 78;letter-spacing:-.005em}

/* ---------- hero: the blueprint ---------- */
.hero{background:var(--bp-deep);color:var(--sheet);overflow:hidden}
.nav{max-width:var(--wrap);margin:0 auto;padding:24px 28px 0;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.mark{font-family:var(--font-d);font-variation-settings:"wdth" 72;font-weight:800;font-size:21px;
  letter-spacing:.04em;text-transform:uppercase;text-decoration:none;display:flex;align-items:center;gap:10px;color:var(--sheet)}
.mark-word{font-weight:inherit}
.mark-word span{color:var(--mute-bp)}
.mark-logo{width:24px;height:19.5px;flex:none}
.mark-logo--foot{width:18px;height:14.6px;margin-right:9px}
.foot-tag{display:flex;align-items:center}
.nav-links{display:flex;gap:22px;font-family:var(--font-m);font-size:12px;letter-spacing:.04em}
.nav-links a{text-decoration:none;color:var(--mute-bp);transition:color .15s}
.nav-links a:hover{color:var(--sheet)}
.nav-live{color:#FF9A8B !important}

.hero-grid{max-width:var(--wrap);margin:0 auto;padding:70px 28px 58px;display:grid;grid-template-columns:minmax(0,10fr) minmax(0,9fr);gap:56px;align-items:center}
.eyebrow{font-family:var(--font-m);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--mute-bp);margin:0 0 20px;
  display:inline-block;border:1px solid var(--line-bp);padding:7px 12px}
h1{font-family:var(--font-d);font-variation-settings:"wdth" 68;font-weight:800;text-transform:uppercase;
  font-size:clamp(42px,4.9vw,72px);line-height:.96;letter-spacing:.005em;margin:0 0 24px}
.sub{font-size:18px;line-height:1.62;color:#C9D8E7;max-width:33em;margin:0 0 30px}
.sub em{font-style:normal;color:var(--white);border-bottom:2px solid var(--stamp)}
.cta-row{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.cta-row--links{margin-top:14px}
.meta-line{font-family:var(--font-m);font-size:11.5px;color:var(--mute-bp)}
.meta-line code{background:rgba(243,246,249,.12);color:var(--sheet);font-size:1em}

.install{display:inline-flex;align-items:center;gap:12px;font-family:var(--font-m);font-size:13.5px;
  background:var(--bp-deeper);color:var(--sheet);border:1px solid var(--line-bp);border-radius:0;
  padding:14px 16px;cursor:pointer;transition:border-color .15s;max-width:100%}
.install:hover{border-color:#FF9A8B}
.install-prompt{color:#FF9A8B}
.install-cmd{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.install-copy{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--mute-bp);border:1px solid var(--line-bp);padding:4px 8px;flex:none}
.install.copied .install-copy{color:#7FD1A8;border-color:#7FD1A8}
.btn-ghost{font-family:var(--font-m);font-size:13px;text-decoration:none;color:var(--sheet);border-bottom:2px solid var(--stamp);padding-bottom:2px;transition:color .15s}
.btn-ghost:hover{color:#FF9A8B}

/* ---------- the demo: two drafting sheets ---------- */
.demo{display:flex;flex-direction:column;margin:0;min-width:0}
.card{position:relative;border-radius:0;box-shadow:0 22px 44px rgba(4,14,28,.45)}
/* corner crop-marks */
.card::before,.card::after{content:"";position:absolute;width:14px;height:14px;pointer-events:none}
.card::before{top:-7px;left:-7px;border-top:1px solid var(--mute-bp);border-left:1px solid var(--mute-bp)}
.card::after{bottom:-7px;right:-7px;border-bottom:1px solid var(--mute-bp);border-right:1px solid var(--mute-bp)}
.card-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line-bp)}
.dot{width:8px;height:8px;border-radius:0;border:1px solid var(--mute-bp);opacity:.8}
.d1,.d2,.d3{background:transparent}
.card-title{font-family:var(--font-m);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute-bp);margin-left:6px}
.term{background:#081524;border:1px solid var(--line-bp)}
.term-body{padding:16px 18px 18px;font-family:var(--font-m);font-size:12.6px;line-height:1.95;min-height:118px}
.tline-user{color:var(--sheet)}
.tprompt{color:#FF9A8B;margin-right:9px}
.caret{display:inline-block;width:7px;height:14px;background:#FF9A8B;vertical-align:-2px;margin-left:2px;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.tline-agent{color:#7E93A9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tline-stamp{color:#F0B429}
.js .tline[data-step]{opacity:0;transition:opacity .4s}
.js .tline[data-step].on{opacity:1}

.stamp-flow{height:34px;display:flex;align-items:center;justify-content:center;position:relative}
.stamp-flow::before{content:"";width:1px;height:100%;background:linear-gradient(var(--line-bp),var(--stamp))}
.stamp-pulse{position:absolute;width:9px;height:9px;background:var(--stamp);opacity:0;top:0}
.demo.stamping .stamp-pulse{animation:drop .7s ease-in forwards}
@keyframes drop{0%{opacity:1;top:0}100%{opacity:.15;top:26px}}

.brain{background:var(--white);color:var(--ink);border:1px solid rgba(24,41,62,.35)}
.card-bar--paper{border-bottom:1px solid var(--line);justify-content:space-between}
.brain-mark{font-family:var(--font-d);font-variation-settings:"wdth" 72;font-weight:800;font-size:13.5px;letter-spacing:.05em;text-transform:uppercase}
.brain-mark i{font-style:normal;color:var(--bp)}
.brain-meta{font-family:var(--font-m);font-size:10px;color:var(--mute)}
.brain-meta .ok{color:#1F7A4D;font-weight:400}
.bpath{font-size:1em}
.brain-body{padding:14px 16px 16px;position:relative}
.bnow{display:flex;gap:9px;align-items:baseline;background:var(--bp-deep);color:var(--sheet);padding:9px 12px;font-size:12.5px;line-height:1.5}
.bnow-tag{font-family:var(--font-m);font-size:9px;letter-spacing:.14em;color:#FF9A8B;flex:none;border:1px solid rgba(255,154,139,.5);padding:2px 6px}
.bnow-text{transition:opacity .35s}
.bnow-text.swap{opacity:0}
.bplan{display:flex;align-items:center;gap:10px;margin:12px 2px 10px;font-family:var(--font-m);font-size:10px;letter-spacing:.06em;color:var(--mute)}
.track{flex:1;height:5px;background:rgba(28,80,133,.14);overflow:hidden}
.track i{display:block;height:100%;background:var(--bp);transition:width .8s ease}
.blog{list-style:none;margin:0;padding:0;font-size:12.2px}
.brow{display:flex;gap:10px;padding:7px 2px;border-top:1px dashed var(--line);line-height:1.45}
.brow--new{background:linear-gradient(90deg,rgba(198,59,47,.09),transparent);animation:landin .5s ease}
@keyframes landin{from{opacity:0;transform:translateY(-7px)}to{opacity:1;transform:none}}
.bwhen{font-family:var(--font-m);font-size:10px;color:var(--mute);flex:none;padding-top:2px}
.bwhat{color:var(--ink)}
/* the inspection stamp */
.stamp-chip{position:absolute;top:-13px;right:12px;font-family:var(--font-m);font-size:9.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--stamp);background:var(--white);border:2px solid var(--stamp);box-shadow:inset 0 0 0 1.5px var(--white),inset 0 0 0 2.5px var(--stamp);
  padding:5px 10px;transform:rotate(-4deg) translateY(4px);opacity:0;transition:opacity .3s,transform .3s}
.stamp-chip.on{opacity:1;transform:rotate(-4deg)}
.demo-cap{font-family:var(--font-m);font-size:11px;color:var(--mute-bp);text-align:center;margin:16px 0 0}
.demo-cap a{color:#FF9A8B}
.demo-cap code{background:rgba(243,246,249,.12);color:var(--sheet)}

/* the title block — index of sheets */
.grit-strip{max-width:var(--wrap);margin:0 auto 30px;display:flex;flex-wrap:wrap;align-items:stretch;
  font-family:var(--font-m);font-size:10px;letter-spacing:.07em;text-transform:uppercase;color:var(--mute-bp);
  border:1px solid var(--line-bp)}
.grit-strip>*{padding:10px 13px;border-right:1px solid var(--line-bp);display:flex;align-items:center}
.grit-strip>*:last-child{border-right:0}
.strip-label{color:var(--sheet);background:rgba(243,246,249,.07)}
/* the title block's field row */
.strip-break{flex-basis:100%;height:0;padding:0;border:0}
.tb-cell{flex:1;gap:10px;border-top:1px solid var(--line-bp);color:var(--sheet)}
.tb-cell b{font-weight:400;color:var(--mute-bp)}
.tb-cell:last-child{border-right:0}
.grit-strip a{text-decoration:none;color:inherit;transition:color .15s,background .15s}
.grit-strip a:hover{color:var(--sheet);background:rgba(243,246,249,.05)}
.grit-strip i{font-style:normal}
.hero .grit-strip{position:relative;z-index:1;max-width:calc(var(--wrap) - 56px);margin:0 28px 34px}
@media (min-width:1177px){.hero .grit-strip{margin-left:auto;margin-right:auto}}

/* ---------- sheets (light bands) ---------- */
.band{padding:86px 0 90px;position:relative}
.band:not(.band--ink){background:
  repeating-linear-gradient(0deg,transparent 0 39px,var(--line-soft) 39px 40px),
  repeating-linear-gradient(90deg,transparent 0 39px,var(--line-soft) 39px 40px),
  var(--sheet)}
.band--tint:not(.band--ink){background:
  repeating-linear-gradient(0deg,transparent 0 39px,rgba(28,80,133,.12) 39px 40px),
  repeating-linear-gradient(90deg,transparent 0 39px,rgba(28,80,133,.12) 39px 40px),
  var(--sheet-2);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grit{font-family:var(--font-m);font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--bp);margin:0 0 16px;
  display:inline-block;border:1px solid var(--line);background:var(--white);padding:6px 11px}
.grit span{color:var(--mute);font-weight:400}
h2{font-family:var(--font-d);font-variation-settings:"wdth" 74;font-weight:800;text-transform:uppercase;
  font-size:clamp(30px,3.8vw,46px);line-height:1.02;letter-spacing:.005em;margin:0 0 20px;color:var(--ink)}
.band-lede{font-size:17.5px;color:var(--ink);max-width:38em;margin:0 0 36px}

.beats{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:44px;border:1px solid var(--line);background:var(--white)}
.beat{padding:24px 24px 22px;border-right:1px solid var(--line)}
.beat:last-child{border-right:0}
.beat h3{font-family:var(--font-d);font-variation-settings:"wdth" 78;font-weight:700;text-transform:uppercase;font-size:16px;letter-spacing:.02em;margin:0 0 9px;color:var(--ink)}
.beat p{margin:0;font-size:15px;color:#42566C}
.capper{font-family:var(--font-d);font-variation-settings:"wdth" 84;font-weight:600;font-size:clamp(20px,2.3vw,26px);color:var(--ink);margin:52px 0 0;text-align:center}
.capper em{font-style:normal;color:var(--stamp-text);border-bottom:3px solid var(--stamp)}
.capper--small{font-size:16px;font-weight:500;font-variation-settings:"wdth" 100;margin-top:44px;color:#42566C}
.link-strong{color:var(--stamp-text);font-weight:700;text-decoration-thickness:2px;text-underline-offset:3px}

.steps{list-style:none;margin:42px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.steps li{border-top:3px solid var(--bp);padding-top:14px;background:linear-gradient(transparent,transparent)}
.step-n{font-family:var(--font-m);font-size:11px;font-weight:700;color:var(--white);background:var(--bp);padding:2px 7px;letter-spacing:.06em}
.steps h3{font-family:var(--font-d);font-variation-settings:"wdth" 78;font-weight:700;text-transform:uppercase;font-size:16.5px;letter-spacing:.02em;margin:10px 0 8px;color:var(--ink)}
.steps p{margin:0;font-size:14.6px;color:#42566C}
.steps code{font-size:.85em;white-space:normal;word-break:break-all}
.aside-note{margin:40px 0 0;font-size:15px;color:#42566C;border-left:3px solid var(--stamp);padding-left:14px;max-width:40em}

.anatomy{display:grid;grid-template-columns:repeat(3,1fr);gap:26px 34px;margin-top:44px;
  background:var(--white);border:1px solid var(--line);padding:28px 30px;position:relative}
.anatomy::before{content:"";position:absolute;top:-7px;left:-7px;width:14px;height:14px;border-top:1px solid var(--bp);border-left:1px solid var(--bp)}
.anatomy::after{content:"";position:absolute;bottom:-7px;right:-7px;width:14px;height:14px;border-bottom:1px solid var(--bp);border-right:1px solid var(--bp)}
.organ h3{margin:0 0 8px}
.organ-k{font-family:var(--font-m);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--bp);border:1.5px solid var(--bp);padding:4px 9px}
.now-k{color:var(--stamp);border-color:var(--stamp)}
.organ p{margin:0;font-size:14.8px;color:#42566C}

.tools{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:40px}
.tool{background:var(--white);border:1px solid var(--line);padding:22px 22px 20px;position:relative}
.tool::before{content:"";position:absolute;top:-1px;left:-1px;width:22px;height:22px;border-top:3px solid var(--bp);border-left:3px solid var(--bp)}
.tool h3{font-family:var(--font-m);font-size:13.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--bp);margin:0 0 8px}
.tool p{margin:0;font-size:14.8px;color:#42566C}

.tenets{list-style:none;margin:38px 0 0;padding:6px 28px;max-width:48em;counter-reset:tenet;background:var(--white);border:1px solid var(--line)}
.tenets li{padding:15px 0 15px 52px;border-top:1px solid var(--line);font-size:16px;position:relative;counter-increment:tenet}
.tenets li:first-child{border-top:0}
.tenets li::before{content:counter(tenet,decimal-leading-zero);position:absolute;left:0;top:16px;
  font-family:var(--font-m);font-size:11px;font-weight:700;color:var(--bp);border:1px solid var(--line);padding:3px 6px;background:var(--white)}
.tenets li:last-child{border-bottom:1px solid var(--line)}
.tenets strong{font-family:var(--font-d);font-variation-settings:"wdth" 80;font-weight:700;text-transform:uppercase;font-size:.95em;letter-spacing:.02em;color:var(--ink);margin-right:6px}

/* ---------- blueprint bookend ---------- */
.band--ink{background:var(--bp-deep);color:var(--sheet)}
.band--ink h2{color:var(--sheet)}
.band-lede--ink{color:#C9D8E7}
.proof-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:0 0 40px;border:1px solid var(--line-bp)}
.stat{display:block;color:inherit;text-decoration:none;padding:18px 18px 14px;border-right:1px solid var(--line-bp);transition:background .15s}
.stat:last-child{border-right:0}
.stat:hover{background:rgba(243,246,249,.06)}
.stat b{font-family:var(--font-d);font-variation-settings:"wdth" 72;font-weight:800;font-size:44px;letter-spacing:0;display:block;line-height:1}
.stat b i{font-style:normal;font-size:22px;color:var(--mute-bp)}
.stat span{font-family:var(--font-m);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-bp)}
.sched-h{font-family:var(--font-m);font-size:10.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--sheet);
  border:1px solid var(--line-bp);border-bottom:0;background:rgba(243,246,249,.07);padding:10px 16px;margin:44px 0 0}
.sched-h span{font-weight:400;color:var(--mute-bp)}
.cta-row--center{justify-content:flex-start;margin-bottom:60px}
.btn-solid{font-family:var(--font-d);font-variation-settings:"wdth" 82;font-weight:700;text-transform:uppercase;letter-spacing:.05em;font-size:14.5px;text-decoration:none;
  background:var(--stamp);color:var(--white);padding:14px 24px;transition:background .15s}
.btn-solid:hover{background:#A93227}
.btn-ghost--ink{color:var(--sheet)}
.install-block{border-top:1px solid var(--line-bp);padding-top:44px}
.install-h{font-family:var(--font-d);font-variation-settings:"wdth" 76;font-weight:800;text-transform:uppercase;font-size:21px;letter-spacing:.02em;margin:0 0 16px}
.install--wide{width:100%;max-width:560px}
.install-note{font-size:14.5px;color:var(--mute-bp);margin:14px 0 0;max-width:44em}
.install-note code{background:rgba(243,246,249,.12);color:var(--sheet)}
.contrib{margin:40px 0 0;font-size:15px;color:var(--mute-bp);max-width:44em}
.contrib a{color:var(--sheet)}

.foot{background:var(--bp-deep);border-top:1px solid var(--line-bp);color:var(--mute-bp)}
.foot-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;padding-bottom:28px}
.foot-tag{font-family:var(--font-m);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--sheet)}
.foot-meta{font-family:var(--font-m);font-size:11.5px}
.foot-meta a{color:var(--mute-bp);text-decoration:none;border-bottom:1px solid var(--line-bp)}
.foot-meta a:hover{color:var(--sheet)}

/* ---------- reveal (scoped to .js-reveal so content is NEVER hidden without JavaScript) ---------- */
.js-reveal .band .wrap{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.js-reveal .band .wrap.in{opacity:1;transform:none}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- focus + motion + responsive ---------- */
:focus-visible{outline:2px solid var(--stamp);outline-offset:3px}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,.band .wrap{animation:none !important;transition:none !important}
  .js-reveal .band .wrap{opacity:1;transform:none}
  .caret{animation:none}
  .js .tline[data-step]{opacity:1}
}
@media (max-width:1020px){
  .hero-grid{grid-template-columns:1fr;gap:52px;padding-top:52px}
  .beats{grid-template-columns:1fr}
  .beat{border-right:0;border-bottom:1px solid var(--line)}
  .beat:last-child{border-bottom:0}
  .anatomy,.tools{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr;gap:32px}
  .proof-stats{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line-bp)}
  .tb-cell,.strip-break{display:none}
}
@media (max-width:640px){
  body{font-size:15.5px}
  .anatomy,.tools,.steps,.proof-stats{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line-bp)}
  .stat:last-child{border-bottom:0}
  .band{padding:62px 0}
  .nav-links{gap:12px;font-size:11px}
  .nav-links a:not(.nav-live):not([href*="github"]){display:none}
  .nav-links a,.foot-meta a{display:inline-block;padding:10px 4px}
  .demo-cap a{display:inline-block;padding:6px 2px}
  .install,.install--wide{width:100%}
  .install-cmd{font-size:11.5px}
  .hero-grid{padding-top:40px;padding-bottom:40px}
  .grit-strip{font-size:9.5px}
  .grit-strip>*{padding:9px 10px}
  .grit-strip i,.strip-label{display:none}
  .eyebrow{letter-spacing:.12em}
}