/* ===== Tokens ===== */
:root{
  --bg:#0b0f17; --surface:#111827; --card:#121826; --line:rgba(255,255,255,.08);
  --text:#eef2ff; --muted:#a3b1d1; --brand:#7c5cff; --brand2:#00e1d9;
  --radius:16px; --shadow:0 10px 30px rgba(0,0,0,.35); --header-h:72px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Noto Sans KR,Apple SD Gothic Neo,Arial;overflow-x:hidden;-webkit-text-size-adjust:100%}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1200px,92%);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
body{padding-top:var(--header-h)}
h1,h2,h3{line-height:1.2}

/* Skip link */
.skip-link{
  position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;
}
.skip-link:focus{left:12px;top:12px;width:auto;height:auto;background:var(--surface);padding:8px 12px;border-radius:8px;z-index:2000}

/* ===== Header ===== */
.header{position:fixed;inset:0 0 auto 0;height:var(--header-h);z-index:1000;background:rgba(11,15,23,.75);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__inner{height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand__img{height:40px;width:auto;display:block}
.brand__title{font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav__list{display:flex;list-style:none;gap:6px;margin:0;padding:0}
.nav__link{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:12px;opacity:.92}
.nav__link:hover,.nav__link:focus-visible{background:rgba(255,255,255,.08)}
.nav__link.active{background:linear-gradient(135deg,var(--brand),var(--brand2));font-weight:800}
.nav-toggle{display:none;border:0;background:rgba(255,255,255,.08);color:var(--text);width:44px;height:44px;border-radius:12px;font-size:20px}
.nav-toggle:focus-visible{outline:2px solid var(--brand2);outline-offset:2px}

/* Drawer */
.nav-drawer{position:fixed;top:var(--header-h);left:0;right:0;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:0 10px 30px rgba(0,0,0,.35);padding:8px 16px 16px;display:none}
.nav-drawer.open{display:block}
.nav-drawer__list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.nav-drawer .nav__link{display:block;padding:14px 12px;border-radius:12px;background:rgba(255,255,255,.04)}
.nav-drawer .nav__link:focus-visible{outline:2px solid var(--brand2);outline-offset:2px}

/* ===== Layout / Components ===== */
section{padding:56px 0}
.hero{padding:80px 0 32px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;background:rgba(124,92,255,.14);color:#d8d0ff;padding:6px 12px;border-radius:999px;font-weight:700}
h1{font-size:42px;margin:.5em 0 .3em}
p{color:var(--muted)}
.actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 14px;border-radius:12px;font-weight:700;box-shadow:var(--shadow);color:var(--text)}
.btn--primary,.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand2))}
.btn--ghost,.btn.ghost{background:rgba(255,255,255,.06)}
.btn:focus-visible{outline:2px solid var(--brand2);outline-offset:2px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.card-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:10px}
.card-title-strong{font-weight:800}
.grid{display:grid;gap:16px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.small{font-size:13px;color:var(--muted)}
.resp-media{aspect-ratio:16/9;border:1px solid var(--line);border-radius:12px;overflow:hidden}

/* Section head */
.section-head{display:flex;justify-content:space-between;align-items:end;gap:12px;flex-wrap:wrap}

/* Board */
.board{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
.notice-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.notice-item a{display:flex;align-items:center;gap:10px;padding:12px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid var(--line)}
.notice-item a:hover,.notice-item a:focus-visible{background:rgba(255,255,255,.07)}
.tag{font-size:12px;color:#111;background:#ffe66d;padding:2px 8px;border-radius:999px;font-weight:800}

/* Modal */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.6);display:none;place-items:center;z-index:2000}
.modal-backdrop.open{display:grid}
.modal{max-width:720px;width:92%}
.modal-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px}
.modal-title{font-size:20px;font-weight:800;margin:0}
.modal-body{color:var(--muted);line-height:1.6}
.modal-foot{display:flex;justify-content:space-between;gap:8px;margin-top:16px}

/* Filters / Chips */
.filters{display:flex;gap:8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid var(--line);font-weight:700;cursor:pointer;user-select:none}
.chip--active{background:linear-gradient(135deg,var(--brand),var(--brand2))}
.chip:focus-visible{outline:2px solid var(--brand2);outline-offset:2px}

/* Footer */
footer{padding:24px 0 60px;color:var(--muted);border-top:1px solid var(--line)}
.footgrid{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center}
.logo-square{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center}
footer .logo-square{background:transparent !important;width:auto;height:auto;border-radius:0;display:inline-block;place-items:initial;padding:0}
footer .logo-square img.footer-logo,footer .logo-square img{display:block;width:48px;height:auto;line-height:0}

/* ===== Responsive ===== */
@media (max-width:980px){
  :root{--header-h:64px}
  .nav{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .hero-grid,.board{grid-template-columns:1fr}
  .grid--3{grid-template-columns:1fr 1fr}
  .brand__title{max-width:40vw}
  .card{box-shadow:0 6px 18px rgba(0,0,0,.28)} /* 모바일 섀도우 완화 */
}
@media (max-width:620px){
  h1{font-size:30px}
  .grid--3,.grid--2{grid-template-columns:1fr}
  .btn{width:100%;justify-content:center}
  .brand__title{display:none}
  section{padding:44px 0}
}

/* Motion reduce */
@media (prefers-reduced-motion: reduce){
  *{scroll-behavior:auto}
}

/* 유튜브/비디오 미리보기 꽉 채우기 */
.resp-media iframe,
.resp-media video,
.resp-media img {
  width: 100%;
  height: 100%;
  display: block;
}