:root{
  box-sizing:border-box;
  --bg:#eef3f6; --surface:#ffffff; --ink:#10212c; --muted:#4f6472;
  --line:#cfdbe3; --accent:#0b5f80; --accent-ink:#ffffff; --mark:#f2b84b;
  --display:"Bricolage Grotesque","Trebuchet MS",system-ui,sans-serif;
  --body:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0c1820; --surface:#13242e; --ink:#e8f0f4; --muted:#9db3c0;
    --line:#25404f; --accent:#5cc3e8; --accent-ink:#06222e; --mark:#f2b84b;
  }
}
:root[data-theme="dark"]{
  --bg:#0c1820; --surface:#13242e; --ink:#e8f0f4; --muted:#9db3c0;
  --line:#25404f; --accent:#5cc3e8; --accent-ink:#06222e; --mark:#f2b84b;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.6}
a{color:inherit}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.wrap{max-width:68rem;margin:0 auto;padding:0 1.5rem}

header.top{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 0}
.brand{font-family:var(--display);font-weight:700;text-decoration:none;font-size:1.1rem}
.top nav{display:flex;align-items:center;gap:1.25rem}
.top nav a{text-decoration:none;color:var(--muted);font-weight:500}
.top nav a:hover{color:var(--ink)}
.icon-btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);width:2.5rem;height:2.5rem;border-radius:50%;cursor:pointer;font-size:1.05rem;display:grid;place-items:center}
.icon-btn:hover{border-color:var(--accent)}

.hero{display:grid;grid-template-columns:1.25fr 1fr;gap:3rem;align-items:center;padding:3rem 0 4.5rem}
h1{font-family:var(--display);font-weight:800;font-size:clamp(3rem,9vw,6.4rem);line-height:.95;letter-spacing:-.03em;margin:0 0 1.5rem}
h1 span{display:block;overflow:hidden}
h1 span i{display:block;font-style:normal;transform:translateY(105%);animation:rise .8s cubic-bezier(.2,.8,.2,1) forwards}
h1 span:nth-child(2) i{animation-delay:.12s}
h1 span:nth-child(3) i{animation-delay:.24s}
@keyframes rise{to{transform:none}}
.lead{max-width:34rem;color:var(--muted);font-size:1.2rem;margin:0 0 2rem}
.actions{display:flex;flex-wrap:wrap;gap:.75rem}
.btn{font:inherit;font-weight:600;border-radius:999px;padding:.8rem 1.4rem;border:2px solid var(--accent);cursor:pointer;text-decoration:none;display:inline-block}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--accent)}

.card{background:var(--surface);border:1px solid var(--line);border-radius:1.25rem;padding:1.75rem;transition:transform .15s ease-out;will-change:transform}
.card .mono{width:5rem;height:5rem;border-radius:1rem;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-family:var(--display);font-weight:800;font-size:1.9rem;letter-spacing:-.02em;margin-bottom:1.25rem;box-shadow:.4rem .4rem 0 var(--mark)}
.card h2{font-family:var(--display);font-size:1.4rem;margin:0 0 .25rem}
.card p{margin:0;color:var(--muted)}
.card dl{margin:1.5rem 0 0;display:grid;gap:.9rem}
.card dt{font-weight:600;font-size:.9rem;color:var(--muted)}
.card dd{margin:0;font-weight:500}

section{padding:3.5rem 0;border-top:1px solid var(--line)}
section h2.title{font-family:var(--display);font-size:clamp(1.8rem,4vw,2.6rem);letter-spacing:-.02em;margin:0 0 1.5rem}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.fact{padding:1.5rem 0 0;border-top:3px solid var(--accent)}
.fact h3{font-family:var(--display);margin:0 0 .4rem;font-size:1.25rem}
.fact p{margin:0;color:var(--muted)}

.timeline{list-style:none;margin:0;padding:0 0 0 1.5rem;border-left:3px solid var(--mark);display:grid;gap:1.5rem;max-width:44rem}
.timeline li{display:grid;grid-template-columns:4.5rem 1fr;gap:1rem;align-items:start}
.timeline time{font-family:var(--display);font-weight:800;font-size:1.5rem;color:var(--accent);line-height:1.2}
.entry{background:var(--surface);border:1px solid var(--line);border-radius:1rem;padding:1.25rem 1.5rem}
.entry h3{font-family:var(--display);font-size:1.5rem;margin:0 0 .15rem}
.entry p{margin:0}
.entry .detail{color:var(--muted);margin-top:.35rem;font-size:.98rem}
.source{margin:1.5rem 0 0;color:var(--muted);font-size:.92rem;max-width:44rem}

.contact p{max-width:34rem;color:var(--muted);margin:0 0 1.5rem}
footer{padding:2rem 0 3rem;color:var(--muted);font-size:.95rem;border-top:1px solid var(--line)}

.toast{position:fixed;left:50%;bottom:calc(1.5rem + env(safe-area-inset-bottom,0px));transform:translate(-50%,150%);background:var(--ink);color:var(--bg);padding:.7rem 1.2rem;border-radius:999px;font-weight:500;transition:transform .3s ease;z-index:10}
.toast.show{transform:translate(-50%,0)}

@media (max-width:52rem){
  .hero{grid-template-columns:1fr;gap:2.5rem;padding-top:1.5rem}
  .facts{grid-template-columns:1fr}
  .top nav a.hide-sm{display:none}
}
@media (max-width:34rem){
  .timeline li{grid-template-columns:1fr;gap:.4rem}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  h1 span i{animation:none;transform:none}
  .card,.toast{transition:none}
}