:root{
  --bg:#f8faf7; --surface:#ffffff; --ink:#16231c; --muted:#5a6b61; --line:#dfe7e0;
  --brand:#1f6f4a; --brand-ink:#ffffff; --brand-soft:#e4f1ea; --warn:#9a5b00; --warn-soft:#fff2d6;
  --radius:14px; --max:1080px;
  --font:system-ui,-apple-system,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic","Segoe UI",Roboto,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f1713; --surface:#16211b; --ink:#e8f0ea; --muted:#9db0a4; --line:#27362d;
    --brand:#4fbf8a; --brand-ink:#08140d; --brand-soft:#173325; --warn:#f0c470; --warn-soft:#3a2d10}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
a{color:var(--brand)}
img,svg{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:var(--surface);padding:8px 12px;border-radius:8px;z-index:99}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.02em;color:var(--ink);text-decoration:none}
.mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--brand);color:var(--brand-ink);font-size:13px;font-weight:800}
.nav nav{display:flex;align-items:center;gap:6px}
.nav nav a.link{color:var(--ink);text-decoration:none;padding:8px 12px;border-radius:8px;font-size:15px}
.nav nav a.link:hover{background:var(--brand-soft)}
.lang{border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:8px;padding:6px 10px;font:inherit;font-size:13px;cursor:pointer}

/* buttons */
.btn{display:inline-block;background:var(--brand);color:var(--brand-ink);padding:12px 20px;border-radius:10px;text-decoration:none;font-weight:700;border:0;font:inherit;font-weight:700;cursor:pointer}
.btn:hover{filter:brightness(1.07)}
.btn.small{padding:8px 14px;font-size:14px}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px}

/* type */
h1{font-size:clamp(32px,5.4vw,54px);line-height:1.18;margin:0 0 18px;letter-spacing:-.02em}
h2{font-size:clamp(25px,3.4vw,34px);line-height:1.25;margin:0 0 14px;letter-spacing:-.01em}
h3{font-size:19px;margin:0 0 6px}
p{margin:0 0 14px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);background:var(--brand-soft);padding:5px 12px;border-radius:99px;margin-bottom:18px}
.lead{font-size:19px;color:var(--muted);max-width:640px}
.muted{color:var(--muted)}
.small-note{font-size:14px;color:var(--muted)}

section{padding:68px 0}
section.alt{background:var(--surface);border-block:1px solid var(--line)}
.hero{padding:76px 0 60px}
.hero .grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 14px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
section.alt .card{background:var(--bg)}
.card .ic{width:38px;height:38px;border-radius:10px;background:var(--brand-soft);display:grid;place-items:center;font-size:18px;margin-bottom:12px}
.tag{display:inline-block;font-size:12px;font-weight:700;border-radius:99px;padding:3px 9px;margin-left:6px;vertical-align:middle;background:var(--warn-soft);color:var(--warn)}
.tag.ok{background:var(--brand-soft);color:var(--brand)}

/* hero preview */
.preview{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 12px 40px rgba(20,50,35,.08)}
.preview .label{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.preview .box{border:1px dashed var(--line);border-radius:12px;padding:14px;margin-bottom:12px;font-size:15px}
.preview .arrow{text-align:center;color:var(--brand);margin:-4px 0 8px}
.chip{display:inline-block;font-size:12px;background:var(--brand-soft);color:var(--brand);padding:2px 8px;border-radius:99px;margin-right:6px}

/* steps / compare / roadmap */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.steps .card::before{counter-increment:s;content:"0" counter(s);display:block;color:var(--brand);font-weight:800;margin-bottom:6px}
.compare{width:100%;border-collapse:collapse;margin-top:22px;font-size:16px}
.compare th,.compare td{text-align:left;padding:14px;border-bottom:1px solid var(--line);vertical-align:top}
.compare th{font-size:14px;color:var(--muted)}
.road{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.road .card ul{padding-left:18px;margin:8px 0 0}
.road .now{border-color:var(--brand)}

/* forms */
form.stack{display:grid;gap:14px;max-width:520px}
label{font-weight:600;font-size:15px;display:block;margin-bottom:6px}
input[type=email],input[type=text],select,textarea{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:inherit}
textarea{min-height:90px;resize:vertical}
.check{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--muted)}
.check input{margin-top:5px}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.status{min-height:24px;font-size:15px}
.status.ok{color:var(--brand)} .status.err{color:#c0392b}

/* demo */
.demo{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:24px}
.out{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;min-height:200px}
.out mark{background:var(--warn-soft);color:var(--warn);padding:0 3px;border-radius:4px}
.warnlist{margin:12px 0 0;padding:12px 14px;background:var(--warn-soft);color:var(--warn);border-radius:10px;font-size:14px}
.warnlist.clean{background:var(--brand-soft);color:var(--brand)}

/* faq */
details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}
summary{cursor:pointer;font-weight:700}
details p{margin:10px 0 0;color:var(--muted)}

/* info table */
.info{width:100%;border-collapse:collapse;max-width:620px}
.info th,.info td{text-align:left;padding:12px 8px;border-bottom:1px solid var(--line)}
.info th{width:34%;color:var(--muted);font-weight:600}
.person{display:flex;gap:16px;align-items:center}
.avatar{width:64px;height:64px;border-radius:50%;background:var(--brand-soft);display:grid;place-items:center;font-weight:800;color:var(--brand);font-size:20px;flex:none}

.mt{margin-top:12px}
.wrap.narrow{max-width:760px}
.warnlist[hidden]{display:none}
footer{border-top:1px solid var(--line);padding:34px 0;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
footer a{color:var(--muted);margin-right:14px}

@media (max-width:820px){
  .hero .grid,.cards,.steps,.road,.demo{grid-template-columns:1fr}
  .nav nav a.link{display:none}
  section{padding:48px 0}
  body{font-size:16px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}