:root{
  --ink:#111111; --ink-2:#3d3d3d; --mute:#767676;
  --bg:#ffffff; --bg-2:#f6f5f1; --line:#e6e4dd; --card:#ffffff;
  --brand:#ffbb03; --brand-ink:#111111; --dark:#050505;
  --radius:18px; --wrap:1120px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ink:#f2f2f2; --ink-2:#cfcfcf; --mute:#9b9b9b;
    --bg:#0b0b0b; --bg-2:#151515; --line:#2a2a2a; --card:#141414;
  }
}
:root[data-theme="dark"]{
  --ink:#f2f2f2; --ink-2:#cfcfcf; --mute:#9b9b9b;
  --bg:#0b0b0b; --bg-2:#151515; --line:#2a2a2a; --card:#141414;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:"Pretendard Variable",Pretendard,system-ui,-apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;word-break:keep-all;overflow-x:hidden}
a{color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--brand);padding:8px 12px;z-index:100}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:var(--dark);color:#fff}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{font-weight:800;letter-spacing:.14em;text-decoration:none;font-size:1.05rem}
.logo small{display:block;font-size:.62rem;letter-spacing:.3em;color:var(--brand);font-weight:600}
.gnb{display:flex;gap:22px;font-size:.92rem}
.gnb a{text-decoration:none;color:#d9d9d9}
.gnb a:hover,.gnb a[aria-current="page"]{color:var(--brand)}
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:12px 20px;border-radius:999px;font-weight:700;text-decoration:none;font-size:.95rem;border:1px solid transparent}
.btn-brand{background:var(--brand);color:var(--brand-ink)}
.btn-line{border-color:var(--line);background:var(--card)}
.btn-dark{background:var(--dark);color:#fff}
.menu-btn{display:none;background:none;border:1px solid #444;color:#fff;border-radius:8px;padding:6px 10px;font:inherit}
@media (max-width:900px){
  .gnb{display:none;position:absolute;top:64px;left:0;right:0;background:var(--dark);flex-direction:column;padding:12px 20px 20px;gap:12px}
  .gnb.open{display:flex}
  .menu-btn{display:block}
  .site-header .btn{display:none}
}

/* breadcrumb */
.crumb{font-size:.82rem;color:var(--mute);padding:18px 0 0}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.crumb li+li::before{content:"›";margin-right:6px}
.crumb a{text-decoration:none}

/* hero */
.hero{background:var(--dark);color:#fff;padding:72px 0 80px}
.hero .eyebrow{color:var(--brand);font-weight:700;letter-spacing:.12em;font-size:.82rem}
.hero h1{font-size:clamp(2rem,5.4vw,3.4rem);line-height:1.25;letter-spacing:-.03em;margin:.6rem 0 1.1rem}
.hero h1 mark{background:none;color:var(--brand)}
.hero p{color:#cfcfcf;max-width:680px;font-size:1.05rem}
.hero .cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}

/* answer box: the 2-3 sentence summary AI can quote */
.answer{background:var(--bg-2);border-left:4px solid var(--brand);border-radius:0 var(--radius) var(--radius) 0;padding:22px 24px;margin:36px 0 0;font-size:1.02rem}
.answer strong{display:block;font-size:.78rem;letter-spacing:.12em;color:var(--mute);margin-bottom:6px}

/* sections */
section{padding:72px 0}
section.alt{background:var(--bg-2)}
h2{font-size:clamp(1.5rem,3.4vw,2.1rem);line-height:1.35;letter-spacing:-.02em;margin-bottom:14px}
h3{font-size:1.15rem;margin:0 0 8px;letter-spacing:-.01em}
.lead{color:var(--ink-2);max-width:720px}
.prose p{margin:0 0 1em;color:var(--ink-2)}
.prose h2{margin-top:2.2em}
.prose h3{margin-top:1.6em}
.prose ul,.prose ol{margin:0 0 1.2em 1.2em;color:var(--ink-2)}
.prose li{margin:.3em 0}

.grid{display:grid;gap:16px;margin-top:32px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card .k{font-size:.78rem;font-weight:700;letter-spacing:.1em;color:var(--mute)}
.card p{color:var(--ink-2);font-size:.95rem}
.num{font-size:2.1rem;font-weight:800;letter-spacing:-.03em;line-height:1.1}
.num small{font-size:1rem;font-weight:700}

table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.95rem}
th,td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:.82rem;color:var(--mute);font-weight:700}
.table-wrap{overflow-x:auto}

.steps{counter-reset:s;list-style:none;display:grid;gap:14px;margin-top:28px}
.steps li{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px 20px 68px;position:relative}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:22px;top:20px;font-weight:800;color:var(--brand);background:var(--dark);border-radius:8px;padding:0 6px;font-size:.85rem}

.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:18px 36px 18px 0;font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:14px;font-size:1.4rem;color:var(--mute)}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 18px;color:var(--ink-2)}

.todo{background:#fff3c4;color:#6b4e00;border-radius:4px;padding:0 4px;font-size:.9em}
.note{font-size:.82rem;color:var(--mute);margin-top:12px}
.updated{font-size:.82rem;color:var(--mute)}

.cta-band{background:var(--brand);color:var(--brand-ink);padding:56px 0;text-align:center}
.cta-band h2{margin-bottom:8px}
.cta-band .btn{margin-top:18px}

.site-footer{background:var(--dark);color:#bdbdbd;font-size:.86rem;padding:48px 0 40px}
.site-footer .cols{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:24px}
.site-footer b{color:#fff}
.site-footer a{color:#bdbdbd}
@media (max-width:760px){.site-footer .cols{grid-template-columns:1fr}}