@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

:root{
  --ink:#0d0d0d;
  --violet:#8000ff;
  --magenta:#ff00ff;
  --text:#ded8e8;
  --dim:#8f87a3;
  --line:rgba(128,0,255,.3);
  --hair:rgba(255,255,255,.08);
  --mono:ui-monospace,SFMono-Regular,'Cascadia Mono','Noto Sans KR',monospace;
  --max:1220px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--ink);
  color:var(--text);
  font-family:'Noto Sans KR',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:17px;
  line-height:1.75;
  background-image:
    linear-gradient(rgba(128,0,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,0,255,.05) 1px,transparent 1px);
  background-size:100% 64px,64px 100%;
}
body::after{
  content:'';position:fixed;inset:0;z-index:90;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.035) 0 1px,transparent 1px 3px);
  opacity:.55;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--magenta);outline-offset:2px}

.site-top{
  position:sticky;top:0;z-index:80;
  background:rgba(13,13,13,.9);
  border-bottom:1px solid var(--line);
  box-shadow:0 0 26px rgba(128,0,255,.22);
}
.brandline{
  max-width:var(--max);margin:0 auto;
  display:flex;align-items:center;gap:12px;
  padding:14px 20px 8px;
}
.brandline .logo img{width:34px;height:34px;filter:drop-shadow(0 0 8px var(--magenta))}
.brandline .name{
  font-family:var(--mono);font-size:1.02rem;letter-spacing:.28em;
  color:#fff;text-shadow:0 0 12px var(--violet);
}
.site-top nav{max-width:var(--max);margin:0 auto;padding:0 20px 12px}
.site-top nav p{display:flex;flex-wrap:wrap;gap:8px;margin:0}
.site-top nav a{
  display:inline-flex;align-items:center;min-height:40px;
  padding:6px 14px;border:1px solid var(--line);border-radius:999px;
  font-family:var(--mono);font-size:.88rem;letter-spacing:.06em;color:#cfc6dd;
  transition:color .2s,border-color .2s,background .2s,box-shadow .2s;
}
.site-top nav a:hover,.site-top nav a:focus-visible{
  color:#fff;border-color:var(--magenta);background:rgba(255,0,255,.12);
  box-shadow:0 0 16px rgba(255,0,255,.45);
}

.hero{
  position:relative;display:flex;align-items:flex-end;justify-content:flex-end;
  overflow:hidden;min-height:100vh;min-height:100svh;
  border-bottom:1px solid var(--line);
}
.hero-fig{
  position:absolute;inset:0;margin:0;
  background:
    radial-gradient(120% 100% at 78% 18%,rgba(128,0,255,.45),transparent 62%),
    linear-gradient(160deg,#150d22,#0d0d0d 72%);
}
.hero-fig img{
  width:100%;height:100%;object-fit:cover;
  filter:hue-rotate(258deg) saturate(1.25) contrast(1.05) brightness(.72);
}
.hero-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(13,13,13,.94) 10%,rgba(13,13,13,.45) 55%,rgba(255,0,255,.16));pointer-events:none}
.hero-veil::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,13,13,.78),transparent 34%,rgba(13,13,13,.95))}
.hero::after{
  content:'';position:absolute;left:-40px;right:-40px;bottom:44px;height:10px;z-index:1;
  background:linear-gradient(90deg,transparent,var(--violet) 30%,var(--magenta) 70%,transparent);
  transform:skewX(-24deg);opacity:.9;box-shadow:0 0 26px var(--magenta);
}
.hero-inner{
  position:relative;z-index:2;width:100%;max-width:var(--max);margin:0 auto;
  padding:120px 20px 132px;text-align:right;
}
.hero h1{
  margin:0 0 14px;
  font-size:clamp(2.1rem,7vw,4.4rem);line-height:1.16;letter-spacing:.03em;
  color:#fff;overflow-wrap:anywhere;
  text-shadow:0 0 18px rgba(128,0,255,.85),0 0 46px rgba(255,0,255,.45);
  animation:glitch 6s infinite;
}
.hero-lead{margin:0 0 0 auto;max-width:34rem;color:#cbc1dd;font-size:1.02rem}
.tape{
  position:absolute;left:0;right:0;bottom:0;z-index:3;overflow:hidden;
  border-top:1px solid var(--line);background:rgba(13,13,13,.72);
  font-family:var(--mono);font-size:.76rem;letter-spacing:.2em;color:#b6a6cf;
}
.tape-run{display:flex;gap:2.2rem;white-space:nowrap;padding:9px 0;animation:tape 26s linear infinite}
@keyframes tape{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes glitch{
  0%,92%,100%{transform:none}
  93%{transform:translate(2px,-1px) skewX(-1.2deg)}
  95%{transform:translate(-3px,1px) skewX(1.4deg)}
  97%{transform:none}
}

.deck{
  max-width:var(--max);margin:0 auto;padding:56px 20px 84px;
  display:grid;grid-template-columns:264px minmax(0,1fr);gap:40px;align-items:start;
}
.rail{
  position:sticky;top:150px;
  border:1px solid var(--line);border-radius:4px;
  background:linear-gradient(180deg,rgba(128,0,255,.14),rgba(13,13,13,.65));
  padding:20px 18px;box-shadow:0 14px 34px rgba(0,0,0,.65);
}
.rail::before,.rail::after{content:'';position:absolute;width:14px;height:14px;border:1px solid var(--magenta)}
.rail::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.rail::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.rail h2{margin:0 0 6px;font-family:var(--mono);font-size:1rem;letter-spacing:.14em;color:#fff}
.subtitle{margin:0 0 14px;font-size:.82rem;line-height:1.7;color:var(--dim)}
.rail ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.rail li a{
  display:flex;align-items:center;min-height:40px;padding:4px 2px;
  font-size:.9rem;color:#c6bcd7;border-bottom:1px dashed rgba(128,0,255,.2);
}
.rail li a::before{content:'▸';margin-right:8px;font-size:.7rem;color:var(--magenta)}
.rail li a:hover,.rail li a:focus-visible{color:#fff;text-shadow:0 0 10px var(--magenta)}

.main-col{min-width:0;counter-reset:sect}
.main-col > article{
  position:relative;padding:38px 0 34px 46px;
  border-left:2px solid rgba(128,0,255,.32);
  scroll-margin-top:230px;counter-increment:sect;
  opacity:0;animation:rise .5s ease-out forwards;
}
.main-col > article + article{margin-top:8px}
.main-col > article::before{
  content:'';position:absolute;left:-2px;top:38px;width:2px;height:40px;
  background:linear-gradient(var(--violet),var(--magenta));box-shadow:0 0 14px var(--magenta);
}
.main-col > article::after{
  content:counter(sect,decimal-leading-zero);
  position:absolute;top:36px;left:10px;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;color:rgba(255,0,255,.6);
}
.main-col > article:nth-child(1){animation-delay:.04s}
.main-col > article:nth-child(2){animation-delay:.09s}
.main-col > article:nth-child(3){animation-delay:.14s}
.main-col > article:nth-child(4){animation-delay:.19s}
.main-col > article:nth-child(5){animation-delay:.24s}
.main-col > article:nth-child(6){animation-delay:.29s}
.main-col > article:nth-child(7){animation-delay:.34s}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

.main-col h2{margin:0 0 8px;font-size:clamp(1.28rem,2.6vw,1.8rem);line-height:1.35;letter-spacing:.02em;color:#fff}
.main-col h3{margin:22px 0 8px;font-size:1.08rem;color:#efe6ff}
.main-col p{margin:0 0 14px;color:#cfc7db}
.main-col ul,.main-col ol{padding-left:1.25em;margin:0 0 14px}
.main-col li{margin-bottom:8px}
.main-col strong{color:#fff}
.main-col a{color:#f0c8ff;border-bottom:1px solid rgba(255,0,255,.4)}
.main-col a:hover{color:#fff;background:rgba(255,0,255,.12)}
.main-col blockquote{
  margin:18px 0;padding:12px 16px;border-left:2px solid var(--magenta);
  border-radius:4px;background:rgba(255,0,255,.06);color:#e5d9f4;
}
.main-col figure,.main-col aside{
  margin:18px 0;padding:12px;border:1px solid var(--line);border-radius:4px;
  background:rgba(128,0,255,.08);box-shadow:0 10px 24px rgba(0,0,0,.5);
}
.main-col table{width:100%;border-collapse:collapse;margin:0 0 16px;font-size:.94rem}
.main-col th,.main-col td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.main-col th{background:rgba(128,0,255,.16);color:#fff}

footer{border-top:1px solid var(--line);background:#0a0a0c}
.foot{
  max-width:var(--max);margin:0 auto;padding:26px 20px 34px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.f-brand{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.92rem;letter-spacing:.2em;color:#fff}
.f-brand img{width:26px;height:26px;filter:drop-shadow(0 0 6px var(--violet))}
footer nav p{display:flex;flex-wrap:wrap;gap:4px 14px;margin:0}
footer nav a{display:inline-flex;align-items:center;min-height:40px;font-size:.84rem;color:var(--dim)}
footer nav a:hover,footer nav a:focus-visible{color:#fff;text-shadow:0 0 10px var(--magenta)}
.f-form{display:flex;flex-wrap:wrap;gap:8px}
.f-form input{
  min-height:40px;width:170px;min-width:0;padding:8px 12px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:4px;
  color:#fff;font-family:inherit;font-size:.88rem;
}
.f-form input:focus{outline:none;border-color:var(--magenta);box-shadow:0 0 12px rgba(255,0,255,.4)}
.f-form button{
  min-height:40px;padding:8px 16px;border-radius:4px;cursor:pointer;
  border:1px solid var(--magenta);color:#fff;font-family:inherit;font-size:.88rem;
  background:linear-gradient(120deg,var(--violet),var(--magenta));
}
.copy{
  margin:0;width:100%;padding-top:14px;text-align:center;
  border-top:1px solid var(--hair);
  font-family:var(--mono);font-size:.78rem;letter-spacing:.12em;color:#6f6880;
}

@media (max-width:820px){
  body{font-size:16px}
  .hero{min-height:82svh}
  .hero-inner{padding:104px 16px 100px;text-align:left}
  .hero-lead{margin-left:0}
  .hero h1{font-size:clamp(1.9rem,8vw,2.6rem)}
  .deck{grid-template-columns:minmax(0,1fr);gap:28px;padding:36px 16px 64px}
  .main-col{order:1}
  .rail{order:2;position:static}
  .main-col > article{padding:30px 0 26px 40px;scroll-margin-top:250px}
  .main-col > article::before{top:30px;height:32px}
  .main-col > article::after{top:29px;left:8px}
  .foot{justify-content:flex-start}
  .copy{text-align:left}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hero h1,.tape-run{animation:none}
  .main-col > article{animation:none;opacity:1}
}

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