:root{
  --bg:oklch(0.972 0.012 62);--ink:oklch(0.24 0.028 35);--ink-soft:oklch(0.46 0.02 40);
  --ink-faint:oklch(0.62 0.015 50);--line:oklch(0.89 0.014 55);--coral:oklch(0.665 0.198 32);
  --coral-deep:oklch(0.60 0.21 30);--card:oklch(0.995 0.004 70);
  --grad:linear-gradient(115deg,oklch(0.665 0.198 32),oklch(0.60 0.21 358) 54%,oklch(0.56 0.17 292));
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:"Sora",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;letter-spacing:-0.011em;-webkit-font-smoothing:antialiased}
a{color:var(--coral-deep);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:760px;margin-inline:auto;padding-inline:clamp(20px,5vw,32px)}
header.lnav{border-bottom:1px solid var(--line);position:sticky;top:0;background:oklch(0.972 0.012 62 / .85);backdrop-filter:blur(10px);z-index:10}
.lnav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:.55em;font-weight:800;font-size:1.1rem;letter-spacing:-0.03em;color:var(--ink)}
.brand svg{width:26px;height:26px}
.lnav a.back{font-weight:600;font-size:.92rem;color:var(--ink-soft)}
.doc{padding-block:clamp(40px,6vw,72px) 80px}
.doc .kicker{font-size:.76rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--coral-deep)}
.doc h1{font-size:clamp(2rem,4.5vw,2.9rem);font-weight:800;letter-spacing:-0.03em;line-height:1.05;margin:.6rem 0 .4rem}
.doc .updated{color:var(--ink-faint);font-size:.88rem;font-weight:500;margin-bottom:2.4rem}
.doc h2{font-size:1.3rem;font-weight:700;letter-spacing:-0.02em;margin:2.4rem 0 .7rem}
.doc p{color:var(--ink-soft);margin-bottom:1rem;max-width:70ch}
.doc ul{color:var(--ink-soft);margin:0 0 1rem 1.2rem;display:flex;flex-direction:column;gap:.4rem}
.doc strong{color:var(--ink);font-weight:700}
.callout{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin:1.6rem 0;color:var(--ink-soft)}
.callout strong{display:block;margin-bottom:.3rem;color:var(--ink)}
.lfoot{border-top:1px solid var(--line);padding:28px 0;font-size:.84rem;color:var(--ink-faint)}
.lfoot a{color:var(--ink-soft);font-weight:600;margin-right:18px}
.note{font-size:.82rem;color:var(--ink-faint);font-style:italic;margin-top:2.6rem;padding-top:18px;border-top:1px solid var(--line)}