:root{
  --bg:#fff;--alt:#f6f8fb;--fg:#111827;--mute:#4b5565;--line:#e3e7ee;--accent:#1d4ed8;--on-accent:#fff;--tint:#eef3ff;
  --font:system-ui,-apple-system,"Segoe UI","Malgun Gothic","Apple SD Gothic Neo","Noto Sans KR",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e1116;--alt:#151a22;--fg:#eef1f6;--mute:#a3adbd;--line:#273040;--accent:#7aa5ff;--on-accent:#0e1116;--tint:#141c2e}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.75 var(--font);word-break:keep-all;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
h1,h2,h3{line-height:1.3;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,6vw,3.5rem);letter-spacing:-.03em;line-height:1.2;font-weight:800}
h2{font-size:clamp(1.5rem,3.5vw,2rem);letter-spacing:-.02em;margin-bottom:.7em}
h2::before{content:"";display:block;width:32px;height:4px;border-radius:2px;background:var(--accent);margin-bottom:14px}
h3{font-size:1.1rem}
p{margin:0 0 1em}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.narrow>*{max-width:720px}
section{padding:88px 0}
.alt{background:var(--alt)}
.skip{position:absolute;left:-999px;top:8px;background:var(--fg);color:var(--bg);padding:8px 12px;z-index:20}
.skip:focus{left:8px}

.site-header{position:sticky;top:0;z-index:10;background:var(--bg);border-bottom:1px solid var(--line)}
@supports (backdrop-filter:blur(1px)){.site-header{background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(10px)}}
.bar{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{color:var(--fg);text-decoration:none;font-weight:800;font-size:1.2rem;letter-spacing:-.02em}
nav{display:flex;align-items:center;gap:20px}
nav a{color:var(--fg);text-decoration:none}
nav a:hover{color:var(--accent)}
nav a:not(.btn){color:var(--mute);font-weight:500}
.menu-btn{display:none;background:none;border:1px solid var(--line);color:var(--fg);padding:6px 12px;border-radius:8px;font:inherit}

.btn{display:inline-block;background:var(--accent);color:var(--on-accent);border:0;border-radius:10px;padding:12px 22px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
.btn{transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(29,78,216,.25)}
nav a.btn{color:var(--on-accent)}
.btn-sm{padding:6px 14px}
.btn-ghost{background:none;color:var(--fg);border:1px solid var(--line)}
.btn-ghost:hover{box-shadow:none;border-color:var(--accent)}

.hero{padding:112px 0 96px;background:linear-gradient(180deg,var(--tint),var(--bg))}
.eyebrow{color:var(--accent);font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.lead{font-size:1.2rem;color:var(--mute);max-width:560px;margin-top:20px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}

.cards{list-style:none;margin:24px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.cards li{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:24px;transition:border-color .15s,transform .15s}
.cards li:hover{border-color:var(--accent);transform:translateY(-2px)}
.cards p{color:var(--mute);margin:0}

.steps{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:0;max-width:640px}
.steps li{display:flex;gap:18px;align-items:flex-start;position:relative;padding-bottom:28px}
.steps li:not(:last-child)::before{content:"";position:absolute;left:17px;top:40px;bottom:4px;width:2px;background:var(--line)}
.steps span{flex:none;width:36px;height:36px;border-radius:50%;background:var(--accent);color:var(--on-accent);display:grid;place-items:center;font-weight:700}
.steps p{color:var(--mute);margin:0}

.narrow>.format{max-width:900px}
.format{border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:12px;padding:24px;background:var(--alt)}
.format p{margin:0 0 8px}
.format ul{margin:0;padding-left:20px}
.format li{margin:4px 0}

footer{border-top:1px solid var(--line);padding:28px 0;color:var(--mute)}
footer p{margin:0 0 4px}

@media (max-width:720px){
  section{padding:64px 0}
  .hero{padding:72px 0 64px}
  .menu-btn{display:block}
  nav{display:none;position:absolute;top:60px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;padding:16px 20px;gap:14px}
  nav.open{display:flex}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}