/* 바코 (Bako) — 공유 스타일. 다크 모던. */
:root{
  --bg:#0f1117; --panel:#161a23; --panel2:#1b2030; --border:#2a3350;
  --navy:#1a2980; --teal:#00acc1; --teal-d:#00899b;
  --text:#e6e8ee; --sub:#9aa3b2; --muted:#6b7385;
  --radius:14px; --maxw:1040px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Segoe UI",Roboto,"Noto Sans KR",sans-serif;
  line-height:1.65; -webkit-font-smoothing:antialiased;
}
a{color:var(--teal); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 20px}

/* lang toggle */
html[data-lang="ko"] .en{display:none}
html[data-lang="en"] .ko{display:none}

/* header */
header.site{position:sticky; top:0; z-index:50; backdrop-filter:blur(10px);
  background:rgba(15,17,23,.82); border-bottom:1px solid var(--border)}
header.site .wrap{display:flex; align-items:center; justify-content:space-between; height:60px}
.brand{display:flex; align-items:center; gap:10px; font-weight:800; font-size:20px; color:#fff; white-space:nowrap}
.brand .logo{width:30px;height:30px;border-radius:8px;
  background:linear-gradient(135deg,var(--navy),var(--teal));
  display:grid;place-items:center}
.brand .logo::before{content:"";width:16px;height:16px;
  background:repeating-linear-gradient(90deg,#fff 0 2px,transparent 2px 4px)}
nav.top a{color:var(--sub); margin-left:18px; font-size:14px; font-weight:600}
nav.top a:hover{color:var(--text); text-decoration:none}
.langbtn{cursor:pointer;border:1px solid var(--border);background:var(--panel);
  color:var(--sub);border-radius:8px;padding:5px 10px;font-size:13px;font-weight:700;margin-left:18px}
.langbtn:hover{color:var(--text);border-color:var(--teal)}

/* hero */
.hero{padding:76px 0 64px; text-align:center; position:relative; overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(600px 300px at 50% -10%,rgba(0,172,193,.18),transparent 70%)}
.hero h1{font-size:clamp(34px,6vw,58px); line-height:1.1; margin:0 0 16px; color:#fff; letter-spacing:-1px}
.hero .accent{color:var(--teal)}
.hero p.lead{font-size:clamp(16px,2.4vw,20px); color:var(--sub); max-width:620px; margin:0 auto 30px}
.cta{display:inline-flex; gap:12px; flex-wrap:wrap; justify-content:center}
.btn{display:inline-block; padding:13px 24px; border-radius:12px; font-weight:700; font-size:15px}
.btn.primary{background:var(--teal); color:#04121a}
.btn.primary:hover{background:var(--teal-d); text-decoration:none}
.btn.ghost{border:1px solid var(--border); color:var(--text); background:var(--panel)}
.btn.ghost:hover{border-color:var(--teal); text-decoration:none}
.store-note{margin-top:14px;font-size:13px;color:var(--muted)}

/* sections */
section.block{padding:56px 0}
section.block h2{font-size:clamp(24px,3.4vw,32px); text-align:center; margin:0 0 8px; color:#fff}
section.block .sub{text-align:center; color:var(--sub); margin:0 auto 36px; max-width:560px}
.grid{display:grid; gap:18px; grid-template-columns:repeat(3,1fr)}
@media(max-width:760px){.grid{grid-template-columns:1fr}}
.card{background:var(--panel); border:1px solid var(--border); border-radius:var(--radius); padding:26px}
.card .ico{width:44px;height:44px;border-radius:11px;background:var(--panel2);
  display:grid;place-items:center;font-size:22px;margin-bottom:14px;border:1px solid var(--border)}
.card h3{margin:0 0 8px; font-size:18px; color:#fff}
.card p{margin:0; color:var(--sub); font-size:15px}

.steps{display:grid;gap:18px;grid-template-columns:repeat(3,1fr);counter-reset:s}
@media(max-width:760px){.steps{grid-template-columns:1fr}}
.step{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:24px;position:relative}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;left:22px;
  width:32px;height:32px;border-radius:9px;background:var(--navy);color:#fff;
  display:grid;place-items:center;font-weight:800;border:1px solid var(--teal)}
.step h3{margin:10px 0 6px;font-size:17px;color:#fff}
.step p{margin:0;color:var(--sub);font-size:14px}

/* legal / doc pages */
.doc{padding:44px 0 72px; max-width:820px}
.doc h1{font-size:30px;color:#fff;margin:0 0 6px}
.doc .eff{color:var(--muted);font-size:14px;margin:0 0 30px}
.doc h2{font-size:20px;color:#fff;margin:34px 0 10px;padding-top:10px;border-top:1px solid var(--border)}
.doc h3{font-size:16px;color:var(--text);margin:20px 0 8px}
.doc p,.doc li{color:var(--sub);font-size:15px}
.doc ul{padding-left:20px}
.doc table{width:100%;border-collapse:collapse;margin:14px 0;font-size:14px}
.doc th,.doc td{border:1px solid var(--border);padding:9px 12px;text-align:left;vertical-align:top}
.doc th{background:var(--panel2);color:var(--text);font-weight:700}
.doc td{color:var(--sub)}
.doc .ph{color:#ffcf6b;font-weight:700}  /* placeholder 강조 */
.tocback{display:inline-block;margin-bottom:20px;font-size:14px;color:var(--sub)}

/* footer */
footer.site{border-top:1px solid var(--border); padding:32px 0; color:var(--muted); font-size:14px}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center}
footer.site a{color:var(--sub);margin-right:16px}
footer.site .cp{color:var(--muted)}

/* mobile header: 붐빔 방지 */
@media(max-width:560px){
  nav.top a{margin-left:12px; font-size:13px}
  nav.top a[href^="#"]{display:none}   /* 앵커(기능/이용법) 숨김, 페이지 링크·lang 유지 */
  .langbtn{margin-left:12px}
  .brand span[style]{display:none}      /* 좁을 때 'Bako' 서브텍스트 숨김 */
}