:root{
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --surface-2:#EEF2F7;
  --ink:#0E1726;
  --ink-soft:#4A5668;
  --ink-faint:#7A8597;
  --line:#DCE3EC;
  --accent:#0B63CE;
  --accent-ink:#FFFFFF;
  --accent-soft:#E3EEFC;
  --cyan:#14B8D4;
  --ok:#17935A;
  --ok-soft:#DDF4E8;
  --bad:#D43B3B;
  --hero-1:#0A1220;
  --hero-2:#12294A;
  --hero-ink:#EAF1FB;
  --hero-soft:#A9B9CF;
  --shadow:0 18px 48px -24px rgba(10,24,48,.35);
  --radius:14px;
  --wrap:1120px;
  --sans:"Pretendard","Segoe UI",system-ui,-apple-system,"Malgun Gothic","Apple SD Gothic Neo","Noto Sans KR",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"Cascadia Mono",Consolas,monospace;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0A0F18;--surface:#111925;--surface-2:#162132;--ink:#E8EEF7;--ink-soft:#AAB6C8;--ink-faint:#7C889B;
    --line:#233044;--accent:#5BA2FF;--accent-ink:#06101F;--accent-soft:#12233D;--ok:#3DCB8A;--ok-soft:#10301F;
    --shadow:0 18px 48px -24px rgba(0,0,0,.7);
  }
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
html[lang=ko] body{word-break:keep-all}
body{overflow-wrap:break-word;margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:clip}
h1,h2,h3,h4{line-height:1.25;margin:0;letter-spacing:-.015em;font-weight:700}
p{margin:0}
a{color:var(--accent);text-underline-offset:3px}
img,svg{max-width:100%;display:block}
:focus-visible{outline:2.5px solid var(--cyan);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:8px;background:var(--surface);padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:800;letter-spacing:.02em;font-size:18px}
.brand svg{width:28px;height:28px}
.brand small{font-weight:500;color:var(--ink-faint);font-size:12px;letter-spacing:0;display:none}
.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav a{color:var(--ink-soft);text-decoration:none;padding:8px 12px;border-radius:10px;font-size:15px;font-weight:600}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink);background:var(--surface-2)}
.nav .lang{border:1px solid var(--line);margin-left:6px;font-size:13px;padding:6px 10px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:12px;font-weight:700;font-size:16px;text-decoration:none;border:1.5px solid transparent;cursor:pointer;font-family:inherit;line-height:1.2}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:var(--surface)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-light{background:#fff;color:#0A1220}
.btn-outline-light{border-color:rgba(255,255,255,.35);color:#fff}
.btn-outline-light:hover{border-color:#fff}
.nav .btn{padding:9px 16px;font-size:14px;margin-left:6px}
.nav a.btn-primary,.nav a.btn-primary:hover{color:var(--accent-ink);background:var(--accent)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--ink);font:inherit;font-weight:600}

/* hero */
.hero{background:radial-gradient(1200px 500px at 85% -10%,#1B4C8C55,transparent),linear-gradient(160deg,var(--hero-1),var(--hero-2));color:var(--hero-ink);padding:72px 0 80px;overflow:hidden}
.hero .grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);margin-bottom:16px}
.hero h1{font-size:clamp(32px,5vw,52px);font-weight:800;margin-bottom:20px}
.hero p.lead{font-size:19px;color:var(--hero-soft);max-width:34em;margin-bottom:30px}
.hero .actions{display:flex;flex-wrap:wrap;gap:12px}
.hero .note{margin-top:18px;font-size:14px;color:var(--hero-soft)}
.hero-art{filter:drop-shadow(0 30px 40px rgba(0,0,0,.45))}
.caption{font-size:12.5px;color:var(--hero-soft);text-align:center;margin-top:10px}

/* sections */
section{padding:72px 0}
.section-alt{background:var(--surface-2)}
.sec-head{max-width:46em;margin-bottom:40px}
.sec-head .eyebrow{color:var(--accent)}
.sec-head h2{font-size:clamp(26px,3.6vw,38px);margin-bottom:14px}
.sec-head p{color:var(--ink-soft);font-size:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--ink-soft);font-size:16px}
.card .ico{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;margin-bottom:16px}
.card .ico svg{width:24px;height:24px}
.card.pop{box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.tag{display:inline-block;font-size:12.5px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent);margin-bottom:12px}
.tag.ok{background:var(--ok-soft);color:var(--ok)}
.list{margin:14px 0 0;padding:0;list-style:none}
.list li{position:relative;padding-left:26px;margin:8px 0;color:var(--ink-soft);font-size:16px}
.list li::before{content:"";position:absolute;left:2px;top:.62em;width:12px;height:7px;border-left:2.5px solid var(--ok);border-bottom:2.5px solid var(--ok);transform:rotate(-45deg) translateY(-3px)}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--accent);color:var(--accent-ink);font-weight:800;font-size:15px;margin-bottom:12px}
.step h3{font-size:17px;margin-bottom:6px}
.step p{font-size:15px;color:var(--ink-soft)}
.band{background:linear-gradient(160deg,var(--hero-1),var(--hero-2));color:var(--hero-ink);border-radius:20px;padding:44px;display:flex;gap:28px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.band h2{font-size:clamp(22px,3vw,30px);margin-bottom:8px}
.band p{color:var(--hero-soft);max-width:34em}
.band .actions{display:flex;gap:12px;flex-wrap:wrap}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:15.5px}
th,td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--surface-2);font-size:14px;color:var(--ink-soft)}
tr:last-child td{border-bottom:0}
td.yes{color:var(--ok);font-weight:700}
.kv{display:grid;grid-template-columns:140px 1fr;gap:6px 18px;font-size:16px}
.kv dt{color:var(--ink-faint);font-weight:600}
.kv dd{margin:0}

/* page heads & prose */
.page-head{background:linear-gradient(160deg,var(--hero-1),var(--hero-2));color:var(--hero-ink);padding:56px 0 48px}
.page-head h1{font-size:clamp(28px,4.2vw,42px);font-weight:800;margin-bottom:12px}
.page-head p{color:var(--hero-soft);font-size:18px;max-width:40em}
.prose{max-width:46em}
.prose h2{font-size:24px;margin:40px 0 12px}
.prose h3{font-size:18px;margin:26px 0 8px}
.prose p,.prose li{color:var(--ink-soft)}
.prose p{margin:10px 0}
.prose ul{padding-left:1.2em}
.faq details{border:1px solid var(--line);border-radius:12px;background:var(--surface);padding:0 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700;padding:16px 0;list-style-position:outside}
.faq details p{padding:0 0 16px;color:var(--ink-soft);font-size:16px}

/* forms */
form.card{max-width:640px}
.field{margin-bottom:16px}
label{display:block;font-weight:700;font-size:14.5px;margin-bottom:6px}
label .opt{font-weight:500;color:var(--ink-faint)}
input[type=text],input[type=email],input[type=tel],select,textarea{width:100%;font:inherit;font-size:16px;padding:12px 14px;border-radius:10px;border:1.5px solid var(--line);background:var(--bg);color:var(--ink)}
textarea{min-height:130px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink-soft);margin:6px 0 18px}
.check input{margin-top:5px;width:18px;height:18px;flex:none}
.hp{position:absolute;left:-9999px}
.small{font-size:14px;color:var(--ink-faint)}
.notice{border-left:4px solid var(--cyan);background:var(--accent-soft);padding:16px 20px;border-radius:0 12px 12px 0;color:var(--ink);font-size:16px}

/* footer */
.site-footer{background:#080D16;color:#A9B5C7;padding:48px 0 32px;font-size:15px}
.site-footer a{color:#D6E2F2;text-decoration:none}
.site-footer a:hover{text-decoration:underline}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.foot h4{color:#fff;font-size:14px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:12px}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin:7px 0}
.legal{border-top:1px solid #1B2638;margin-top:32px;padding-top:20px;font-size:13px;display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}

@media (max-width:900px){
  .hero .grid{grid-template-columns:1fr}
  .hero{padding:48px 0 56px}
  .grid-3,.grid-4,.steps{grid-template-columns:repeat(2,1fr)}
  .foot{grid-template-columns:1fr 1fr}
  .menu-btn{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:64px;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:12px 20px 18px;gap:2px}
  .nav.open{display:flex}
  .nav a{padding:12px}
  .nav .btn{margin:8px 0 0;justify-content:center}
  .nav .lang{margin:6px 0 0;text-align:center}
}
@media (max-width:600px){
  body{font-size:16px}
  section{padding:52px 0}
  .grid-3,.grid-2,.grid-4,.steps{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr}
  .band{padding:28px}
  .kv{grid-template-columns:1fr}
}

/* blog / prose */
.prose img{border-radius:12px;margin:18px 0;border:1px solid var(--line)}
.prose pre{background:#0C1626;color:#EAF1FB;padding:16px;border-radius:10px;overflow-x:auto;font-size:14.5px;line-height:1.6}
.prose code{font-family:var(--mono);background:var(--surface-2);padding:2px 6px;border-radius:6px;font-size:.92em}
.prose pre code{background:none;padding:0}
.prose blockquote{border-left:4px solid var(--cyan);margin:16px 0;padding:2px 18px;color:var(--ink-soft);background:var(--accent-soft);border-radius:0 10px 10px 0}
.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.prose ol{padding-left:1.4em}
.prose .table-wrap{margin:16px 0}
.post-meta{color:var(--hero-soft);font-size:15px;margin-top:10px}
.post-list{display:grid;gap:16px;max-width:46em}
.post-card{display:block;text-decoration:none;color:inherit}
.post-card:hover{border-color:var(--accent)}
.post-card h3{margin:6px 0 6px;font-size:20px}