*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-bottom:140px;color-scheme:dark;-webkit-text-size-adjust:100%}
body{margin:0;background:#000;color:#e6eaf2;font-family:"Noto Sans KR",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:17px;line-height:1.78;padding-bottom:120px;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:#cbdfff;text-decoration:none;transition:color .18s ease,background-color .18s ease}
a:hover{color:#fff}
:focus-visible{outline:2px solid #3d7bff;outline-offset:3px;border-radius:8px}
h1,h2,h3{line-height:1.34;margin:0 0 .55em;font-weight:700;letter-spacing:-.01em;color:#f2f6ff}
p{margin:0 0 1.1em}
hr{height:2px;width:170px;max-width:56%;border:0;margin:0 0 1.3em;border-radius:2px;background:linear-gradient(90deg,#3d7bff,rgba(61,123,255,0))}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.mark{width:8px;height:8px;border-radius:50%;background:#3d7bff;box-shadow:0 0 12px rgba(61,123,255,.8);display:inline-block;flex:0 0 auto}

/* ---- hero ---- */
.hero{position:relative;isolation:isolate;min-height:70vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:clamp(20px,3vw,34px);padding:clamp(34px,7vw,82px) 20px clamp(50px,8vw,92px);text-align:center;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(58% 60% at 50% 4%,rgba(61,123,255,.2),transparent 68%)}
.hero-h1{margin:0;font-size:clamp(29px,6.4vw,58px);letter-spacing:-.02em;text-shadow:0 0 26px rgba(61,123,255,.3)}
.hero-media{width:min(100%,820px);border:1px solid #1a2130;border-radius:18px;overflow:hidden;background:#080a0f}
.hero-media img{width:100%;aspect-ratio:16/9;object-fit:cover;filter:brightness(.9) saturate(.94)}
.hero-band{position:absolute;left:-6%;right:-6%;bottom:-15px;height:28px;background:linear-gradient(90deg,rgba(61,123,255,0),rgba(61,123,255,.5),rgba(61,123,255,0));transform:skewY(-1.8deg);filter:blur(.5px);pointer-events:none}

/* ---- layout ---- */
.wrap{max-width:1180px;margin:0 auto;padding:clamp(24px,5vw,58px) 20px;display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:clamp(24px,4vw,52px);align-items:start}
.col{min-width:0}

/* ---- prose ---- */
.prose{min-width:0}
.prose>section{padding:clamp(26px,4vw,44px) 0;border-top:1px solid #13161d;scroll-margin-top:22px}
.prose>section:first-child{border-top:0;padding-top:0}
.prose h2{font-size:clamp(22px,3vw,30px)}
.prose h3{font-size:clamp(18px,2.3vw,21px);color:#d7e3ff}
.prose p{color:#c6cedb}
.prose ul,.prose ol{padding-left:1.35em;color:#c6cedb}
.prose li{margin:.4em 0}
.prose strong{color:#fff}
.prose blockquote{margin:1.4em 0;padding:2px 0 2px 18px;border-left:2px solid #3d7bff;color:#a9b5c9}
.prose img{border-radius:18px;border:1px solid #1a2130;margin:1.2em 0}
.prose a{border-bottom:1px solid rgba(61,123,255,.45)}

/* ---- aside ---- */
.side{position:sticky;top:24px;border:1px solid #1a2130;border-radius:18px;padding:20px 16px;background:linear-gradient(180deg,#0b0e15,#000)}
.side-h2{margin:0 0 .5em;font-size:17px;letter-spacing:.05em}
.side-list{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:2px}
.side-list a{display:flex;align-items:center;gap:9px;min-height:42px;padding:8px;border-radius:12px;color:#939cad;font-size:16px}
.side-list a::before{content:"";width:6px;height:6px;border-radius:50%;background:#25314a;flex:0 0 auto;transition:background-color .18s ease,box-shadow .18s ease}
.side-list a:hover{color:#fff;background:#0f1524}
.side-list a:hover::before{background:#3d7bff;box-shadow:0 0 10px rgba(61,123,255,.7)}

/* ---- footer ---- */
.foot{border-top:1px solid #161c28;background:#050608;padding:34px 20px 30px;margin-top:14px}
.foot-main{max-width:1180px;margin:0 auto;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px 26px}
.foot-brand{display:inline-flex;align-items:center;gap:10px;color:#eef3ff;font-weight:700;letter-spacing:.02em}
.foot-nav{flex:1 1 320px;min-width:0}
.foot-nav dl{display:flex;flex-wrap:wrap;gap:6px;margin:0}
.foot-nav dt,.foot-nav dd{margin:0}
.foot-nav dd{display:none}
.foot-nav a{display:inline-flex;align-items:center;min-height:40px;padding:0 11px;border-radius:10px;border:1px solid #1a2130;color:#939cad;font-size:15px}
.foot-nav a:hover{border-color:#2b4270;color:#fff;background:#0d1424}
.foot-form{flex:0 1 300px}
.foot-form form{display:flex;gap:8px}
.foot-form input{flex:1 1 auto;min-width:0;min-height:44px;padding:0 12px;border-radius:12px;border:1px solid #1a2130;background:#0a0d13;color:#e6eaf2;font:inherit;font-size:15px}
.foot-form input::placeholder{color:#68718a}
.foot-form button{min-height:44px;padding:0 18px;border-radius:12px;border:1px solid #2c4f9e;background:#0e1a33;color:#cfe0ff;font:inherit;font-size:15px;cursor:pointer;transition:background-color .18s ease,color .18s ease}
.foot-form button:hover{background:#14284f;color:#fff}
.foot-copy{flex:1 1 100%;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid #12161f;padding-top:16px;margin-top:4px;color:#6f788a;font-size:14px}
.foot-copy a{display:inline-flex;align-items:center;min-height:40px;padding:0 6px;color:#8d97a9}

/* ---- dock ---- */
.dock{position:fixed;left:0;right:0;bottom:0;z-index:60;background:rgba(4,6,10,.95);backdrop-filter:blur(10px);border-top:1px solid #182031;padding:6px 8px calc(6px + env(safe-area-inset-bottom))}
.dock-nav{max-width:1180px;margin:0 auto;display:flex;align-items:center;justify-content:center;gap:2px}
.dock-nav a{flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-height:48px;padding:4px 2px;border-radius:12px;color:#98a3b6;font-size:12px;line-height:1.16;letter-spacing:-.02em;text-align:center;word-break:keep-all}
.dock-nav a:hover,.dock-nav a.on{color:#fff;background:#101a2c}
.ic{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.dock-nav a.dock-brand{flex:0 0 auto;flex-direction:row;gap:7px;min-height:30px;padding:0 10px;color:#eaf1ff;font-weight:700;font-size:13px;letter-spacing:.02em}
.dock-nav a.dock-brand .mark{width:7px;height:7px}

/* ---- motion ---- */
.rv{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

/* ---- responsive ---- */
@media (max-width:880px){
  .wrap{grid-template-columns:minmax(0,1fr)}
  .side{position:static;order:2}
  .foot-form{flex:1 1 240px}
}
@media (max-width:719px){
  body{font-size:16px;padding-bottom:132px}
  .dock-nav{flex-wrap:wrap;gap:0}
  .dock-nav a{font-size:12px;padding:4px 1px;min-height:50px}
  .dock-nav a.dock-brand{flex:0 0 100%;order:-1;justify-content:center;min-height:26px;padding:0;margin-bottom:2px}
  .ic{width:19px;height:19px}
  .hero{min-height:0;padding-top:clamp(26px,9vw,44px);gap:20px}
  .hero-h1{font-size:clamp(26px,8vw,38px)}
  .prose>section{padding:26px 0}
  .foot{padding-bottom:24px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  a,button,.side-list a::before{transition:none}
}

button[aria-expanded]{min-width:44px;min-height:44px}