/* Cooper Buckles -- portfolio, v2 (2026-10-01).
   Navy from his résumé, one sky accent, system fonts (no web fonts to load).
   Motion is opt-out: everything here switches off under prefers-reduced-motion. */
:root{
  --bg:#FFFFFF; --surface:#FFFFFF; --wash:#F4F7FA; --line:#E3E9EF;
  --ink:#13202B; --ink-2:#3E4C58; --muted:#687784;
  --navy:#1A5276; --navy-2:#123A55; --accent:#2E86C1; --accent-soft:#E3F0FA;
  --shadow:0 1px 2px rgba(19,32,43,.06),0 8px 24px rgba(19,32,43,.06);
  --shadow-lift:0 2px 4px rgba(19,32,43,.08),0 18px 40px rgba(19,32,43,.12);
  --max:1080px; --r:14px;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"Cascadia Mono","SF Mono",Consolas,monospace;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#0C151E; --surface:#111E2A; --wash:#132433; --line:#20364A;
  --ink:#E7EEF4; --ink-2:#B4C2CE; --muted:#8798A6;
  --navy:#7FB6DC; --navy-2:#A9D0EA; --accent:#5DADE2; --accent-soft:#16304A;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  --shadow-lift:0 2px 4px rgba(0,0,0,.35),0 18px 40px rgba(0,0,0,.4);
  color-scheme:dark;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0C151E; --surface:#111E2A; --wash:#132433; --line:#20364A;
    --ink:#E7EEF4; --ink-2:#B4C2CE; --muted:#8798A6;
    --navy:#7FB6DC; --navy-2:#A9D0EA; --accent:#5DADE2; --accent-soft:#16304A;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
    --shadow-lift:0 2px 4px rgba(0,0,0,.35),0 18px 40px rgba(0,0,0,.4);
    color-scheme:dark;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:17px/1.65 var(--font);color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;transition:background .3s,color .3s}
a{color:var(--navy);text-underline-offset:3px}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:12px;background:var(--surface);padding:8px 12px;z-index:9}
.progress{position:fixed;top:0;left:0;height:3px;width:100%;background:var(--accent);
  transform-origin:0 50%;transform:scaleX(var(--p,0));z-index:20}

/* ---- navigation ---- */
nav{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .3s}
nav.scrolled{border-bottom-color:var(--line)}
nav .wrap{display:flex;align-items:center;gap:22px;height:66px}
.brand{font-weight:800;letter-spacing:.6px;color:var(--ink);text-decoration:none;font-size:16px}
.brand span{color:var(--accent)}
nav .links{margin-left:auto;display:flex;gap:22px;font-size:15px}
nav .links a{color:var(--ink-2);text-decoration:none;position:relative}
nav .links a::after{content:"";position:absolute;left:0;right:100%;bottom:-4px;height:2px;background:var(--accent);
  transition:right .25s}
nav .links a:hover::after,nav .links a[aria-current="page"]::after{right:0}
nav .links a[aria-current="page"]{color:var(--ink)}
.theme{border:1px solid var(--line);background:var(--surface);color:var(--ink);width:38px;height:38px;
  border-radius:50%;cursor:pointer;font-size:16px;display:grid;place-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:10px;font-size:16px;
  font-weight:700;text-decoration:none;border:2px solid var(--navy);transition:transform .2s,box-shadow .2s,background .2s}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift)}
.btn.primary{background:var(--navy);color:#fff}
:root[data-theme="dark"] .btn.primary{color:#0C151E}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn.primary{color:#0C151E}}
.btn.ghost{color:var(--navy);background:transparent}
.btn.sm{padding:8px 14px;font-size:14px;border-width:1.5px}

/* ---- hero ---- */
.hero{position:relative;overflow:hidden;padding:96px 0 84px}
.hero::before{content:"";position:absolute;inset:-30% -10% auto;height:130%;z-index:-1;
  background:radial-gradient(40% 45% at 18% 30%,var(--accent-soft),transparent 70%),
             radial-gradient(35% 40% at 82% 22%,color-mix(in srgb,var(--navy) 14%,transparent),transparent 70%),
             radial-gradient(30% 35% at 60% 85%,color-mix(in srgb,var(--accent) 10%,transparent),transparent 70%);
  animation:drift 22s ease-in-out infinite alternate}
@keyframes drift{to{transform:translate3d(2%,4%,0) scale(1.06)}}
.hero-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:48px;align-items:center}
.eyebrow{font:600 13px/1 var(--mono);letter-spacing:1.6px;text-transform:uppercase;color:var(--accent)}
.hero h1{font-size:clamp(40px,6vw,64px);line-height:1.04;letter-spacing:-1.2px;margin:14px 0 0}
.hero .lead{font-size:20px;color:var(--ink-2);max-width:620px;margin:22px 0 0}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.chip{font-size:13px;font-weight:600;padding:6px 12px;border-radius:99px;background:var(--accent-soft);color:var(--navy)}
.cta{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.where{margin-top:16px;color:var(--muted);font-size:15px}

/* The signature: the page's own search result, typed out. */
.serp{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:22px}
.serp .q{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:99px;padding:10px 16px;
  font-size:15px;color:var(--ink-2);min-height:44px}
.serp .q .typed::after{content:"";display:inline-block;width:2px;height:1.1em;margin-left:2px;vertical-align:-2px;
  background:var(--accent);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.serp .res{margin-top:18px;opacity:0;transform:translateY(8px);transition:opacity .6s,transform .6s}
.serp.done .res{opacity:1;transform:none}
.serp .crumb{font-size:13px;color:var(--muted)}
.serp .t{font-size:19px;color:var(--accent);margin:4px 0 2px;font-weight:600;line-height:1.3}
.serp .d{font-size:14px;color:var(--ink-2);line-height:1.5}
.serp .rich{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.serp .rich span{font-size:12px;border:1px solid var(--line);border-radius:99px;padding:4px 10px;color:var(--ink-2)}
.serp .cap{font:600 11px var(--mono);letter-spacing:1px;text-transform:uppercase;color:var(--muted);margin-top:16px}

/* ---- numbers ---- */
/* padding-top/bottom only: the element is also .wrap, whose side gutter must survive. */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding-top:8px;padding-bottom:64px}
.stat{background:var(--wash);border-radius:var(--r);padding:20px}
.stat b{display:block;font-size:34px;line-height:1.1;color:var(--navy);font-variant-numeric:tabular-nums;letter-spacing:-.5px}
.stat span{font-size:14px;color:var(--muted)}

/* ---- sections ---- */
section{padding:84px 0;border-top:1px solid var(--line)}
section h2{font-size:clamp(28px,3.4vw,38px);letter-spacing:-.6px;line-height:1.15;margin:0 0 10px}
.lede{color:var(--ink-2);margin:0 0 36px;font-size:18px;max-width:680px}

.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px;
  display:flex;flex-direction:column;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow-lift);border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}
.case .ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--accent-soft);
  color:var(--navy);margin-bottom:16px}
.tag{font:600 12px var(--mono);color:var(--accent);text-transform:uppercase;letter-spacing:1.2px}
.case h3{font-size:21px;line-height:1.28;margin:8px 0 6px}
.when{font-size:14px;color:var(--muted);margin-bottom:12px}
.case p{font-size:15.5px;color:var(--ink-2);margin:0 0 10px}
.case .more{margin-top:auto;padding-top:14px;font-weight:700;font-size:15px;text-decoration:none}
.case .more::after{content:" \2192";display:inline-block;transition:transform .2s}
.case:hover .more::after{transform:translateX(4px)}
/* The whole card is the link (stretched link); the text stays in the flow. */
.case .more::before{content:"";position:absolute;inset:0;border-radius:var(--r)}

/* ---- timeline ---- */
.timeline{position:relative;margin:0;padding:0 0 0 34px;list-style:none}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:var(--line)}
.timeline::after{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:var(--accent);
  transform-origin:top;transform:scaleY(var(--grow,0));transition:transform 1.4s cubic-bezier(.2,.7,.2,1)}
.timeline.in{--grow:1}
.timeline li{position:relative;padding:0 0 30px}
.timeline li::before{content:"";position:absolute;left:-31px;top:7px;width:14px;height:14px;border-radius:50%;
  background:var(--bg);border:3px solid var(--accent);z-index:1}
.timeline .yr{font:600 13px var(--mono);color:var(--accent)}
.timeline h3{margin:2px 0 2px;font-size:19px}
.timeline .org{color:var(--muted);font-size:15px}
.timeline p{margin:6px 0 0;color:var(--ink-2);font-size:15.5px;max-width:720px}
.timeline .steps{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.timeline .steps span{font-size:12.5px;padding:3px 10px;border-radius:99px;border:1px solid var(--line);color:var(--ink-2)}

/* ---- skills ---- */
.skills{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.skill{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.skill h3{margin:0 0 10px;font-size:16px;color:var(--navy)}
.skill ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.skill li{font-size:13.5px;padding:5px 10px;border-radius:8px;background:var(--wash);color:var(--ink-2)}

/* ---- hire me: the home tiles are links into the services page ---- */
.offer{display:block;text-decoration:none;color:inherit;transition:transform .2s,border-color .2s,box-shadow .2s}
.offer:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}
.offer p{margin:0;font-size:14.5px;color:var(--ink-2)}
.offers + .cta{margin-top:28px}

.creds{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.cred{display:flex;gap:14px;align-items:flex-start;padding:16px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.cred .ico{flex:none;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:var(--accent-soft);color:var(--navy)}
.cred b{display:block}
.cred span{color:var(--ink-2);font-size:15px}

/* ---- case-study pages ---- */
.article{max-width:780px}
.article header{padding:72px 0 30px}
.article h1{font-size:clamp(32px,4.6vw,46px);line-height:1.12;letter-spacing:-.8px;margin:10px 0 12px}
.article h2{font-size:25px;margin:46px 0 12px;letter-spacing:-.3px}
.article p,.article li{font-size:17.5px;color:var(--ink-2)}
.article li{margin:8px 0}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:30px 0 8px}
.facts div{background:var(--wash);border-radius:var(--r);padding:16px 18px}
.facts b{display:block;font-size:30px;color:var(--navy);font-variant-numeric:tabular-nums}
.facts span{font-size:13.5px;color:var(--muted)}
/* ---- services page ---- */
.article.wide{max-width:980px}
.article.wide header p:not(.when){max-width:760px}
.svcs{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:18px 0 8px}
.svc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--shadow);
  scroll-margin-top:90px;display:flex;flex-direction:column}
.svc:target{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.article .svc h2{font-size:20px;margin:6px 0 8px;letter-spacing:-.2px}
.article .svc p{font-size:15.5px;margin:0 0 10px}
.article .svc .done{font-size:14px;color:var(--muted);margin:auto 0 0;padding-top:10px;border-top:1px solid var(--line)}
.svc .done b{color:var(--ink-2)}
.callout{border-left:4px solid var(--accent);background:var(--wash);padding:14px 18px;border-radius:0 10px 10px 0;margin:22px 0}
.back{display:inline-block;margin:46px 0 72px;font-weight:700;text-decoration:none}

/* The platform, as a clickable diagram (functional names only, no topology). */
.diagram{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0 10px}
/* Each part is a <details>: readable and crawlable with no script at all. */
.node{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:14px 16px;color:var(--ink);
  transition:border-color .2s,transform .2s,box-shadow .2s;align-self:start}
.node summary{list-style:none;cursor:pointer;position:relative;padding-right:22px}
.node summary::-webkit-details-marker{display:none}
.node summary::after{content:"+";position:absolute;right:0;top:0;font-size:20px;line-height:1;color:var(--accent);transition:transform .2s}
.node[open] summary::after{transform:rotate(45deg)}
.node b{display:block;font-size:15.5px}
.node small{color:var(--muted);font-size:13px}
.node p{font-size:15px!important;margin:10px 0 0;color:var(--ink-2)}
.node:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.node[open]{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}

footer{padding:72px 0 56px;background:var(--wash);border-top:1px solid var(--line)}
footer h2{font-size:32px;margin:0 0 10px;letter-spacing:-.5px}
footer p{color:var(--ink-2);margin:0 0 24px;max-width:620px}
.small{font-size:13px;color:var(--muted);margin-top:34px}

/* ---- motion ----
   ROBUST BY DESIGN (v2.1): nothing is hidden by CSS alone. The script marks
   only content that starts BELOW the fold as .pre (hidden until scrolled to),
   and plays the hero's entrance only in a visible tab. Content on screen at
   load is never hidden -- not in a background tab, not to a crawler's
   renderer, not to a screenshot, and not with JavaScript off. */
.reveal.pre{opacity:0;transform:translateY(16px)}
.reveal.pre.in{opacity:1;transform:none;transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1);
  transition-delay:var(--d,0ms)}
.entrance .hero .reveal{animation:rise .8s cubic-bezier(.2,.7,.2,1) both;animation-delay:var(--d,0ms)}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal.pre{opacity:1;transform:none}
  .timeline{--grow:1}
  .serp .res{opacity:1;transform:none}
}
@media (max-width:900px){
  .hero-grid,.cases,.skills,.facts,.creds,.diagram,.svcs{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  nav .links{display:none}
  .hero{padding:64px 0 56px}
}