:root{
  color-scheme: light;
  --bg:#f6f8fb;
  --paper:#ffffff;
  --paper-2:#fbfcfe;
  --ink:#111827;
  --text:#1f2937;
  --muted:#667085;
  --soft:#f1f5f9;
  --line:#dbe3ee;
  --line-strong:#c5d0df;
  --brand:#1f6feb;
  --brand-2:#0ea5a4;
  --green:#15803d;
  --yellow:#b7791f;
  --red:#c2414b;
  --radius:18px;
  --shadow:0 18px 42px rgba(15,23,42,.08);
  --max:1180px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    linear-gradient(180deg,#ffffff 0,#f7f9fc 36rem,var(--bg) 100%);
  color:var(--text);
  line-height:1.62;
}
body:before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(90deg,rgba(31,111,235,.055) 1px,transparent 1px),
    linear-gradient(180deg,rgba(31,111,235,.04) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:linear-gradient(180deg,#000 0,transparent 55%);
}
a{color:inherit}
.skip{position:absolute;left:-999px;top:10px;background:var(--brand);color:white;padding:.75rem 1rem;border-radius:12px;z-index:10}
.skip:focus{left:10px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.86);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav{max-width:var(--max);margin:auto;display:flex;align-items:center;justify-content:space-between;padding:.9rem 1.25rem}
.brand{display:inline-flex;gap:.7rem;align-items:center;text-decoration:none;font-weight:850;letter-spacing:-.02em;color:var(--ink)}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:#0f172a;color:#fff;font-size:.78rem;letter-spacing:-.04em;box-shadow:0 8px 18px rgba(15,23,42,.16)}
.nav-links{display:flex;gap:.2rem;align-items:center}
.nav-links a{padding:.55rem .75rem;border-radius:10px;color:var(--muted);text-decoration:none;font-size:.94rem;font-weight:700}
.nav-links a:hover,.nav-links a:focus{background:var(--soft);color:var(--ink)}
.nav-toggle{display:none;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:.5rem .7rem;font-size:1.1rem}
.section{position:relative;max-width:var(--max);margin:auto;padding:5rem 1.25rem}
.hero{padding-top:6.2rem;padding-bottom:4.6rem}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.28fr) minmax(320px,.72fr);gap:2rem;align-items:center}
.eyebrow{color:var(--brand);text-transform:uppercase;letter-spacing:.12em;font-weight:850;font-size:.76rem;margin:0 0 .85rem}
h1,h2,h3{line-height:1.08;margin:0;letter-spacing:-.045em;color:var(--ink);text-wrap:pretty}
h1{font-size:clamp(3rem,7.2vw,6.1rem);max-width:880px}
h1 span{color:var(--brand)}
h2{font-size:clamp(2rem,3.8vw,3.35rem);max-width:920px}
h3{font-size:1.2rem;margin-bottom:.72rem}
p{color:var(--muted);margin:0 0 1rem}.lede{font-size:clamp(1.08rem,1.8vw,1.28rem);max-width:760px;margin-top:1.2rem;color:#475467}.hero-actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2rem}.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border:1px solid var(--line-strong);padding:.82rem 1rem;border-radius:12px;color:var(--ink);font-weight:800;background:#fff;box-shadow:0 1px 2px rgba(15,23,42,.05)}.btn:hover{transform:translateY(-1px);border-color:#9fb0c7;box-shadow:0 8px 20px rgba(15,23,42,.08)}.btn.primary{background:#0f172a;color:white;border-color:#0f172a}.version-card,.card,.panel,.source-box{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.version-card{padding:1rem;border-top:4px solid var(--brand)}.version-row{display:flex;justify-content:space-between;gap:1rem;padding:.95rem 0;border-bottom:1px solid var(--line)}.version-row:last-child{border-bottom:0}.muted{color:var(--muted)}code{font-family:"SFMono-Regular",Consolas,monospace;background:#eff6ff;border:1px solid #bfdbfe;border-radius:7px;padding:.1rem .34rem;color:#0f4ea3}.section-head{margin-bottom:1.9rem}.section-head p:not(.eyebrow){max-width:780px}.cards{display:grid;gap:1rem}.cards.three{grid-template-columns:repeat(3,1fr)}.cards.two{grid-template-columns:repeat(2,1fr)}.card,.panel,.source-box{padding:1.25rem}.card{position:relative;overflow:hidden}.card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--brand)}.accent-red:before{background:var(--red)}.accent-blue:before{background:var(--brand)}.accent-green:before{background:var(--green)}.positive:before{background:var(--green)}.warning:before{background:var(--yellow)}.panel-section{max-width:calc(var(--max) + 36px)}.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-bottom:1rem}.metric{background:#fff;border:1px solid var(--line);border-radius:16px;padding:1.15rem;box-shadow:0 8px 24px rgba(15,23,42,.05)}.metric span{display:block;color:var(--muted);font-size:.9rem}.metric strong{display:block;font-size:2rem;letter-spacing:-.05em;color:var(--ink)}.code-layout{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1rem 0}.bar-item{margin:.8rem 0}.bar-label{display:flex;justify-content:space-between;gap:1rem;font-size:.92rem;color:var(--muted);margin-bottom:.35rem}.bar-label strong{color:var(--ink)}.bar-track{height:10px;border-radius:999px;background:#e8eef6;overflow:hidden}.bar-fill{height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:width .8s ease}.checklist{padding:0;margin:0;list-style:none}.checklist li{position:relative;padding-left:1.45rem;margin:.72rem 0;color:var(--muted)}.checklist li:before{content:"";position:absolute;left:0;top:.56rem;width:.5rem;height:.5rem;border-radius:99px;background:var(--brand)}.compact li{margin:.48rem 0}.kv{margin:0}.kv div{display:grid;grid-template-columns:130px 1fr;gap:1rem;padding:.65rem 0;border-bottom:1px solid var(--line)}.kv div:last-child{border-bottom:0}.kv dt{font-weight:850;color:var(--ink)}.kv dd{margin:0;color:var(--muted)}.risk-list{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.risk{background:#fff;border:1px solid var(--line);border-radius:17px;padding:1.15rem;box-shadow:0 8px 24px rgba(15,23,42,.045)}.risk span{display:inline-flex;margin-bottom:.8rem;padding:.2rem .5rem;border-radius:999px;font-size:.72rem;font-weight:900;text-transform:uppercase}.risk.high{border-color:#fecdd3}.risk.high span{background:#fff1f2;color:var(--red)}.risk.medium{border-color:#fde68a}.risk.medium span{background:#fffbeb;color:var(--yellow)}.risk.low{border-color:#bbf7d0}.risk.low span{background:#f0fdf4;color:var(--green)}.tabs{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:.7rem;box-shadow:var(--shadow)}.tab-buttons{display:flex;flex-wrap:wrap;gap:.45rem;border-bottom:1px solid var(--line);padding-bottom:.7rem}.tab-buttons button{border:1px solid transparent;border-radius:10px;padding:.68rem .9rem;background:transparent;color:var(--muted);font-weight:850;cursor:pointer}.tab-buttons button:hover{background:var(--soft);color:var(--ink)}.tab-buttons button[aria-selected="true"]{background:#0f172a;color:white;border-color:#0f172a}.tab-panel{display:none;padding:1.3rem .7rem .6rem}.tab-panel.active{display:block}.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.timeline article{position:relative;background:#fff;border:1px solid var(--line);border-radius:17px;padding:1.15rem;box-shadow:0 8px 24px rgba(15,23,42,.045)}.timeline span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:#eff6ff;color:var(--brand);font-weight:950;margin-bottom:1rem}.migration-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.steps{padding-left:1.25rem;margin:0;color:var(--muted)}.steps li{margin:.8rem 0}.sources a{color:var(--brand)}.source-box p{margin-bottom:.8rem}.footer{border-top:1px solid var(--line);max-width:var(--max);margin:2rem auto 0;padding:2rem 1.25rem 3rem;display:flex;justify-content:space-between;gap:1rem}.footer p{max-width:760px;font-size:.9rem}.footer a{color:var(--brand);text-decoration:none;font-weight:850}
@media (max-width:900px){body:before{display:none}.hero-grid,.cards.three,.cards.two,.metrics-grid,.code-layout,.risk-list,.timeline,.migration-grid{grid-template-columns:1fr}.section{padding:3.8rem 1rem}.hero{padding-top:5rem}.nav-toggle{display:block}.nav-links{display:none;position:absolute;left:1rem;right:1rem;top:68px;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:16px;padding:.7rem;box-shadow:var(--shadow)}.nav-links.open{display:flex}.nav-links a{width:100%}.footer{flex-direction:column}.kv div{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}