/* SPDX-FileCopyrightText: © 2026 Justin Burdine <justin@cyburdine.com>
   SPDX-License-Identifier: BSD-3-Clause
   justinburdine.com — the professional one-pager (site/about.html). */
/* self-hosted: the page CSP is font-src 'self' */
@font-face{font-family:'IBM Plex Sans';src:url('/assets/fonts/IBMPlexSans-Regular.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Sans';src:url('/assets/fonts/IBMPlexSans-Medium.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Sans';src:url('/assets/fonts/IBMPlexSans-SemiBold.woff2') format('woff2');font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Sans Condensed';src:url('/assets/fonts/IBMPlexSansCondensed-600.woff2') format('woff2');font-weight:600 700;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('/assets/fonts/IBMPlexMono-Regular.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('/assets/fonts/IBMPlexMono-Medium.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap}
/* ═══════════════════════════════════════════════════════════
   JUSTIN BURDINE — one page
   Theme "Instrument", carried over from cyburdine.com:
   cold blue-graphite ground, cyan = systems/data,
   amber = signal/craft. Mono is a label face, not a body face.
   ═══════════════════════════════════════════════════════════ */
:root{
  color-scheme: dark;
  --bg:#0a0f14;
  --bg-lift:#0d141b;
  --fg:#d6e4ec;
  --dim:#7d95a3;
  --cyan:#4fd6d6;
  --amber:#ffb020;
  --white:#fff;
  --rule:#1e2c37;
  --rule-lit:#2f4757;
  --panel:rgba(79,214,214,.045);
  --sans:'IBM Plex Sans',system-ui,-apple-system,sans-serif;
  --cond:'IBM Plex Sans Condensed','IBM Plex Sans',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --pad:clamp(18px,4vw,56px);
  --maxw:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font-family:var(--sans);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px}

/* faint CRT texture — static, no animation */
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:60;
  background:
    repeating-linear-gradient(to bottom,rgba(255,255,255,.028) 0 1px,transparent 1px 3px),
    radial-gradient(ellipse 120% 80% at 50% 40%,transparent 55%,rgba(0,0,0,.45) 100%);
  mix-blend-mode:screen;opacity:.55;
}

.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

/* ── label / eyebrow utility ─────────────────────────────── */
.lab{
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--dim);
}

/* ── top frame bar ───────────────────────────────────────── */
.frame{
  border-bottom:1px solid var(--rule);
  background:linear-gradient(to bottom,rgba(79,214,214,.03),transparent);
}
.frame-in{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;padding-top:14px;padding-bottom:14px;
}
.frame-id{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--dim)}
.frame-id b{color:var(--fg);font-weight:500}
.frame-nav{display:flex;gap:20px;flex-wrap:wrap}
.frame-nav a{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}
.frame-nav a:hover{color:var(--cyan);text-decoration:none}

/* ── hero ────────────────────────────────────────────────── */
.hero{padding-top:clamp(48px,9vw,104px);padding-bottom:clamp(36px,6vw,64px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(28px,6vw,72px);align-items:end}
.hero-name{
  font-family:var(--cond);font-weight:700;
  font-size:clamp(58px,13vw,146px);line-height:.83;
  letter-spacing:-.025em;text-transform:uppercase;color:var(--white);
  margin:0;
}
.hero-name span{display:block}
.hero-name .n2{color:var(--cyan)}
.hero-role{
  margin:22px 0 0;font-family:var(--mono);font-size:clamp(11px,1.5vw,13px);
  letter-spacing:.22em;text-transform:uppercase;color:var(--amber);
}
.hero-thesis{
  font-size:clamp(19px,2.3vw,26px);line-height:1.35;font-weight:500;
  color:var(--white);margin:0 0 20px;letter-spacing:-.01em;
  border-left:2px solid var(--amber);padding-left:18px;
}
.hero-body{color:var(--dim);font-size:clamp(15px,1.7vw,17px);margin:0;max-width:52ch}
.hero-body em{color:var(--fg);font-style:normal}

/* readout strip */
.readout{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);
  margin-top:clamp(36px,6vw,64px);
}
.ro{padding:18px 0 20px;border-left:1px solid var(--rule)}
.ro:first-child{border-left:0}
.ro-n{font-family:var(--cond);font-weight:600;font-size:clamp(26px,4vw,42px);line-height:1;color:var(--amber);padding-left:16px}
.ro:first-child .ro-n{padding-left:0}
.ro-l{display:block;margin-top:8px;padding-left:16px}
.ro:first-child .ro-l{padding-left:0}

/* ── SCRUBBER (the signature) ────────────────────────────── */
.scrub{
  position:sticky;top:0;z-index:40;
  background:rgba(10,15,20,.94);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
}
.scrub-in{padding-top:10px;padding-bottom:12px}
.scrub-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:9px}
.scrub-now{
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;
  color:var(--fg);text-transform:uppercase;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.scrub-now b{color:var(--amber);font-weight:500}
.scrub-rail{
  position:relative;height:26px;
  border-bottom:1px solid var(--rule-lit);
}
.scrub-rail::before{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(to right,var(--rule),var(--rule-lit),var(--rule));
}
.tick{
  position:absolute;bottom:0;width:14px;margin-left:-7px;height:26px;
  padding:0;border:0;background:none;cursor:pointer;
  display:flex;align-items:flex-end;justify-content:center;
}
.tick::after{
  content:"";width:1px;height:9px;background:var(--rule-lit);
  transition:height .18s ease,background .18s ease;
}
.tick[data-track="signal"]::after{background:rgba(255,176,32,.42)}
.tick[data-track="systems"]::after{background:rgba(79,214,214,.42)}
.tick:hover::after{height:16px}
.tick[data-track="signal"]:hover::after,.tick.is-on[data-track="signal"]::after{background:var(--amber)}
.tick[data-track="systems"]:hover::after,.tick.is-on[data-track="systems"]::after{background:var(--cyan)}
.tick.is-on::after{height:20px}
.span{
  position:absolute;bottom:0;height:3px;left:0;width:0;min-width:1px;
  background:var(--cyan);opacity:.55;pointer-events:none;
  transition:left .35s cubic-bezier(.4,0,.2,1),width .35s cubic-bezier(.4,0,.2,1),background .2s ease;
}
.span[data-track="signal"]{background:var(--amber)}
.playhead{
  position:absolute;bottom:-1px;width:1px;height:26px;
  background:var(--white);left:0;
  transition:transform .35s cubic-bezier(.4,0,.2,1);
  will-change:transform;
}
.playhead::after{
  content:"";position:absolute;bottom:-3px;left:-2.5px;
  width:6px;height:6px;background:var(--white);
  transform:rotate(45deg);
}
.scrub-years{position:relative;height:16px;margin-top:5px}
.yr{
  position:absolute;top:0;transform:translateX(-50%);
  font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--dim);
  white-space:nowrap;
}
.yr.edge-l{transform:none;left:0}
.yr.edge-r{transform:none;right:0;left:auto}

/* ── section furniture ───────────────────────────────────── */
.sec{padding-top:clamp(56px,9vw,104px);padding-bottom:clamp(20px,4vw,40px)}
.sec-head{display:flex;align-items:baseline;gap:16px;margin-bottom:clamp(28px,5vw,48px);flex-wrap:wrap}
.sec-h{
  font-family:var(--cond);font-weight:600;text-transform:uppercase;
  font-size:clamp(28px,5vw,52px);line-height:1;letter-spacing:-.015em;
  color:var(--white);margin:0;
}
.sec-note{color:var(--dim);font-size:15px;max-width:60ch;margin:0}

/* ── timeline ────────────────────────────────────────────── */
.legend{display:flex;gap:24px;flex-wrap:wrap;margin-bottom:26px}
.leg{display:flex;align-items:center;gap:9px}
.leg i{width:9px;height:9px;border-radius:50%;display:block}
.leg.sys i{background:var(--cyan);box-shadow:0 0 10px rgba(79,214,214,.55)}
.leg.sig i{background:var(--amber);box-shadow:0 0 10px rgba(255,176,32,.55)}

.tl{position:relative;padding-bottom:20px}
.tl::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;
  background:linear-gradient(to bottom,transparent,var(--rule) 5%,var(--rule) 95%,transparent);
}
.tl-origin{
  position:relative;max-width:56ch;margin:0 auto clamp(40px,6vw,64px);
  text-align:center;padding:0 8px;
}
.tl-origin p{color:var(--dim);font-size:16px;margin:10px 0 0}
.tl-origin strong{color:var(--fg);font-weight:500}

.node{position:relative;width:50%;padding-bottom:clamp(30px,4.5vw,48px);scroll-margin-top:110px}
.node.sys{padding-right:clamp(28px,4vw,54px);text-align:right}
.node.sig{margin-left:50%;padding-left:clamp(28px,4vw,54px)}
/* connector + dot */
.node::before{
  content:"";position:absolute;top:11px;width:clamp(20px,3vw,38px);height:1px;background:var(--rule-lit);
}
.node.sys::before{right:0}
.node.sig::before{left:0}
.node::after{
  content:"";position:absolute;top:7px;width:9px;height:9px;border-radius:50%;
  background:var(--bg);border:1px solid var(--rule-lit);
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.node.sys::after{right:-5px}
.node.sig::after{left:-4px}
.node.sys.is-on::after{background:var(--cyan);border-color:var(--cyan);box-shadow:0 0 14px rgba(79,214,214,.6)}
.node.sig.is-on::after{background:var(--amber);border-color:var(--amber);box-shadow:0 0 14px rgba(255,176,32,.6)}

.node-yr{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--dim);display:block}
.node.sys .node-yr{color:var(--cyan)}
.node.sig .node-yr{color:var(--amber)}
.node-t{font-family:var(--cond);font-weight:600;font-size:clamp(20px,2.6vw,29px);line-height:1.12;color:var(--white);margin:7px 0 3px;letter-spacing:-.01em}
.node-o{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--fg);margin:0 0 10px}
.node-d{color:var(--dim);font-size:15px;margin:0;max-width:46ch}
.node.sig .node-d{max-width:46ch}
.node.sys .node-d{margin-left:auto}
.node-tags{margin:12px 0 0;padding:0;list-style:none;display:flex;gap:7px;flex-wrap:wrap}
.node.sys .node-tags{justify-content:flex-end}
.node-tags li{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--dim);border:1px solid var(--rule);padding:3px 8px;
}
.node-mark{
  display:inline-flex;align-items:center;gap:7px;margin-top:12px;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--amber);border-top:1px solid rgba(255,176,32,.28);padding-top:9px;
}
.node.sys .node-mark{flex-direction:row-reverse}

/* reveal */
.rv{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1)}
.rv.is-in{opacity:1;transform:none}

/* ── tools ───────────────────────────────────────────────── */
.tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule)}
.tool{background:var(--bg);padding:20px 20px 22px;display:flex;flex-direction:column;gap:6px;transition:background .2s ease}
.tool:hover{background:var(--bg-lift)}
.tool-top{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.tool-id{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--cyan)}
.tool-st{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.tool-st.on{color:var(--amber)}
.tool-n{font-family:var(--cond);font-weight:600;font-size:22px;line-height:1.1;color:var(--white);margin:5px 0 0}
.tool-d{color:var(--dim);font-size:14.5px;margin:0;flex:1}
.tool-p{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:var(--rule-lit);margin:8px 0 0}
.tools-foot{margin-top:20px}

/* ── credits ─────────────────────────────────────────────── */
.credits{border-top:1px solid var(--rule)}
.cr{
  display:grid;grid-template-columns:64px 1fr auto;gap:16px;align-items:baseline;
  padding:13px 0;border-bottom:1px solid var(--rule);
}
.cr-y{font-family:var(--mono);font-size:12.5px;color:var(--dim);letter-spacing:.06em}
.cr-t{font-family:var(--cond);font-weight:600;font-size:clamp(17px,2.2vw,23px);color:var(--fg);letter-spacing:-.005em}
.cr.oscar .cr-t{color:var(--white)}
.cr.oscar .cr-y{color:var(--amber)}
.cr-b{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--amber);text-align:right;white-space:nowrap}
.cr-b.plain{color:var(--rule-lit)}

/* ── close / contact ─────────────────────────────────────── */
.close{padding-top:clamp(64px,10vw,120px);padding-bottom:clamp(48px,7vw,80px)}
.close-q{
  font-family:var(--cond);font-weight:600;text-transform:uppercase;
  font-size:clamp(30px,6.5vw,72px);line-height:1;letter-spacing:-.02em;
  color:var(--white);margin:0 0 clamp(28px,5vw,44px);max-width:16ch;
}
.close-q em{color:var(--amber);font-style:normal}
.links{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule)}
.lk{background:var(--bg);padding:18px 20px 20px;display:block;transition:background .2s ease}
.lk:hover{background:var(--bg-lift);text-decoration:none}
.lk-v{display:block;font-family:var(--mono);font-size:14px;color:var(--cyan);margin-top:7px;word-break:break-word}
.lk:hover .lk-v{color:var(--white)}
.foot{border-top:1px solid var(--rule);padding-top:20px;padding-bottom:36px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}

/* ── responsive ──────────────────────────────────────────── */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;align-items:start}
  .readout{grid-template-columns:repeat(2,1fr)}
  .ro:nth-child(3){border-left:0}
  .ro:nth-child(-n+2){border-bottom:1px solid var(--rule)}
  .ro:nth-child(odd) .ro-n,.ro:nth-child(odd) .ro-l{padding-left:0}
}
@media (max-width:760px){
  .tl::before{left:5px}
  .tl-origin{text-align:left;margin-left:0;padding-left:30px}
  .node,.node.sys,.node.sig{
    width:100%;margin-left:0;padding-left:30px;padding-right:0;text-align:left;
  }
  .node::before{left:5px;width:18px;right:auto}
  .node.sys::after,.node.sig::after{left:1px;right:auto}
  .node.sys .node-tags{justify-content:flex-start}
  .node.sys .node-d{margin-left:0}
  .node.sys .node-mark{flex-direction:row}
  .cr{grid-template-columns:56px 1fr;gap:12px}
  .cr-b{grid-column:2;text-align:left}
  .scrub-now{font-size:10px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .rv{opacity:1;transform:none}
}
.readout-flush{margin-top:0}