:root{
  --nav-bg:#1e293b; --accent:#2563eb; --green:#16a34a; --red:#dc2626; --yellow:#d97706;
  --bg:#ffffff; --bg-alt:#f5f5f7; --ink:#1d1d1f; --ink-2:#6e6e73; --line:#d2d2d7; --card:#ffffff;
  --radius:18px; --shadow:0 4px 24px rgba(0,0,0,.06);
  --font:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--accent:#3b82f6;--bg:#000;--bg-alt:#111114;--ink:#f5f5f7;--ink-2:#a1a1a6;--line:#38383d;--card:#1c1c1e;--shadow:none}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.6;
  word-break:keep-all;-webkit-font-smoothing:antialiased;padding-bottom:64px}
@media (min-width:780px){body{padding-bottom:0}}
img{max-width:100%;height:auto}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
@media (min-width:780px){.wrap{padding:0 24px}}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:var(--nav-bg);color:#fff}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{color:#fff;font-weight:700;font-size:18px;letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.nav-toggle{background:none;border:0;color:#fff;font-size:24px;padding:8px;cursor:pointer}
.js .nav{display:none}
.nav{position:absolute;top:56px;left:0;right:0;background:var(--nav-bg);padding:8px 16px 16px}
.js .nav.is-open{display:block}
/* 자바스크립트가 없으면 메뉴를 펼쳐 둔다 */
html:not(.js) .nav-toggle{display:none}
html:not(.js) .site-header .wrap{height:auto;flex-wrap:wrap;padding-top:12px;padding-bottom:12px}
html:not(.js) .nav{position:static;display:flex;flex-wrap:wrap;gap:4px 20px;padding:8px 0 0;width:100%}
.nav a{display:block;color:#e2e8f0;padding:10px 0;font-size:16px}
.nav a[aria-current="page"]{color:#fff;font-weight:700}
@media (min-width:780px){
  .nav-toggle{display:none}
  .nav,.js .nav,.js .nav.is-open{display:flex;position:static;padding:0;gap:28px;background:none;width:auto}
  .nav a{padding:0;font-size:15px}
}

/* sections & type */
.section{padding:64px 0}
.section--alt{background:var(--bg-alt)}
@media (min-width:780px){.section{padding:96px 0}}
.eyebrow{color:var(--accent);font-weight:700;font-size:13px;letter-spacing:2px;margin:0 0 8px}
.h1{font-size:clamp(32px,6vw,56px);line-height:1.15;letter-spacing:-.03em;margin:0 0 16px;font-weight:800}
.h2{font-size:clamp(26px,4vw,40px);line-height:1.2;letter-spacing:-.02em;margin:0 0 16px;font-weight:700}
.lead{font-size:clamp(17px,2.2vw,21px);color:var(--ink-2);margin:0 0 32px;max-width:40em}

/* layout */
.grid-2,.grid-3{display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:780px){.grid-2{grid-template-columns:repeat(2,1fr);gap:24px}.grid-3{grid-template-columns:repeat(3,1fr);gap:24px}}

/* card */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.card h2,.card h3{margin:0 0 8px;font-size:21px;letter-spacing:-.01em}
.card p{margin:0;color:var(--ink-2)}
.card--link{display:block;color:inherit;transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s cubic-bezier(.2,.8,.2,1)}
.card--link:hover{text-decoration:none;transform:translateY(-6px);box-shadow:0 12px 32px rgba(0,0,0,.10)}
.card--link .more{display:inline-block;margin-top:16px;color:var(--accent);font-weight:600}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:48px;padding:0 22px;
  border-radius:999px;font-weight:600;font-size:16px;border:1px solid transparent;cursor:pointer;font-family:inherit}
.btn:hover{text-decoration:none;filter:brightness(1.05)}
.btn--primary{background:var(--accent);color:#fff}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn[disabled]{opacity:.6;cursor:wait}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* steps, stats, notice */
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:16px}
.steps li{counter-increment:s;position:relative;padding:20px 20px 20px 64px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
.steps li::before{content:counter(s);position:absolute;left:20px;top:20px;width:30px;height:30px;border-radius:50%;
  background:var(--nav-bg);color:#fff;font-weight:700;display:grid;place-items:center;font-size:15px}
.stat strong{display:block;font-size:clamp(32px,5vw,44px);font-weight:800;letter-spacing:-.03em;color:var(--accent);
  background:linear-gradient(135deg,var(--accent),var(--green));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat > span{color:var(--ink-2);font-size:15px}
.notice{border-left:4px solid var(--yellow);background:var(--bg-alt);padding:16px 20px;border-radius:8px;color:var(--ink-2);font-size:15px}

/* form */
.form-row{display:grid;gap:6px;margin-bottom:16px}
.form-row label{font-weight:600;font-size:15px}
.form-row input,.form-row select,.form-row textarea{font:inherit;padding:12px 14px;border:1px solid var(--line);
  border-radius:12px;background:var(--card);color:var(--ink);width:100%}
.form-row textarea{min-height:140px;resize:vertical}
.hp{position:absolute;left:-9999px}
.form-status{margin-top:12px;font-weight:600}
.form-status.ok{color:var(--green)}
.form-status.err{color:var(--red)}

/* portrait */
.portrait{display:block;width:100%;max-width:420px;aspect-ratio:1/1;object-fit:cover;border-radius:var(--radius);background:var(--bg-alt)}

/* long text */
.prose{max-width:760px}
.prose h2{font-size:21px;letter-spacing:-.01em;margin:40px 0 8px}
.prose ul{padding-left:20px}
.prose li{margin:4px 0}

/* consent */
.consent-box ul{margin:8px 0;padding-left:20px}
.consent-box p{margin:0}
.form-row--check{display:flex;align-items:center;gap:10px}
.form-row--check input{width:20px;height:20px;flex:none;accent-color:var(--accent)}

/* skip link */
.skip-link{position:absolute;left:-9999px;top:8px;z-index:100;background:#fff;color:#000;padding:8px 14px;border-radius:8px;font-weight:600}
.skip-link:focus{left:16px}

/* footer */
.site-footer{background:var(--nav-bg);color:#cbd5e1;font-size:14px;padding:40px 0}
.site-footer a{color:#fff}
.site-footer dl{display:grid;grid-template-columns:auto 1fr;gap:4px 16px;margin:0 0 16px}
.site-footer dt{color:#94a3b8}
.site-footer dd{margin:0}

/* mobile action bar */
.action-bar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:grid;grid-template-columns:repeat(2,1fr);
  background:var(--nav-bg);border-top:1px solid #334155}
.action-bar a{color:#fff;text-align:center;padding:12px 0 14px;font-size:14px;font-weight:600}
.action-bar a:hover{text-decoration:none;background:#334155}
@media (min-width:780px){.action-bar{display:none}}