:root{--header-offset: 160px;
  --bg:#0f172a; --panel:#111827; --muted:#94a3b8; --text:#e5e7eb; --accent:#22d3ee; --ring:#334155;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Ubuntu,"Helvetica Neue",Arial,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
header{position:sticky;top:0;z-index:50;background:linear-gradient(180deg, rgba(15,23,42,.98), rgba(15,23,42,.9));backdrop-filter:saturate(180%) blur(6px);border-bottom:1px solid var(--ring)}
.container{max-width:1100px;margin:auto;padding:0 16px}
.nav{display:flex;align-items:center;gap:16px;padding:14px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.3px}
.brand .logo{width:28px;height:28px;border-radius:10px;background:conic-gradient(from 45deg,#22d3ee,#38bdf8,#34d399,#eab308,#22d3ee);box-shadow:0 0 0 2px #0ea5b7 inset}
nav ul{list-style:none;margin:0;padding:0;display:flex;gap:10px;flex-wrap:wrap}
nav>ul>li{position:relative}
.menu-link{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border-radius:10px;color:var(--text)}
.menu-link.active{background:#0b1224;border:1px solid var(--ring)}
.menu-link:hover{background:#0b1224}
footer.foot{padding:24px 0;border-top:1px solid var(--ring);font-size:14px;color:var(--muted);margin-top:40px}
main{padding:22px 0 64px}
section.page{padding:28px 0}
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:24px;align-items:center;padding:40px 0}
.hero img{width:100%;height:auto;object-fit:contain;border-radius:20px;border:1px solid var(--ring);background:#000;max-height:600px}
.card{background:var(--panel);border:1px solid var(--ring);border-radius:18px;padding:16px;margin:16px 0}
figure{margin:0 0 14px}
figure img{width:100%;height:auto;object-fit:contain;border-radius:12px;border:1px solid var(--ring);background:#000;max-height:600px}
h1{margin:.3em 0 .4em;font-size:36px;line-height:1.15}
h2{margin:0 0 12px;font-size:28px}
h3{margin:18px 0 8px;font-size:20px}
p{color:#cbd5e1;line-height:1.7}
.badge{display:inline-block;padding:6px 10px;border:1px solid var(--ring);border-radius:999px;color:var(--muted);font-size:13px}
.btn{display:inline-block;padding:10px 14px;border-radius:12px;border:1px solid var(--ring);background:#0b1224;color:#e2e8f0;text-decoration:none;margin-right:8px}
blockquote{border-left:3px solid var(--ring);margin:12px 0;padding:6px 12px;color:#cbd5e1}
@media (max-width:880px){
  .hero{grid-template-columns:1fr}
}

/* Submenu (dropdown) */
nav ul li.submenu-parent{position:relative}
nav ul li.submenu-parent > a:after{content:' ▾';font-size:12px}
.submenu{position:absolute;left:0;top:110%;background:var(--panel);border:1px solid var(--ring);border-radius:12px;box-shadow:0 20px 40px rgba(0,0,0,.35);padding:8px;display:none;min-width:240px}
.submenu a{display:block;padding:10px 12px;border-radius:8px;color:var(--text);text-decoration:none}
.submenu a:hover{background:#0b1224}
nav ul li.submenu-parent:hover > .submenu{display:block}

/* Mobile nav */
.nav-controls{margin-left:auto;display:none;align-items:center;gap:8px}
.burger{border:1px solid var(--ring);background:#0b1224;color:#e2e8f0;border-radius:10px;padding:8px 10px;cursor:pointer}
@media (max-width:940px){
  nav ul{display:none;flex-direction:column;gap:0;background:var(--panel);border:1px solid var(--ring);border-radius:12px;padding:8px;margin-top:10px}
  nav ul.open{display:flex}
  .nav-controls{display:flex}
  nav ul li{width:100%}
  nav ul li a.menu-link{display:flex;justify-content:space-between;padding:12px}
  nav ul li.submenu-parent .submenu{position:static;display:none;border:none;box-shadow:none;padding:0;margin:0 8px 8px 8px}
  nav ul li.submenu-parent.open .submenu{display:block}
  nav ul li.submenu-parent > a:after{content:'▸';transition:transform .2s}
  nav ul li.submenu-parent.open > a:after{content:'▾'}
}

/* Anchor offset for sticky header */
:target { scroll-margin-top: 120px; }
.card[id], h2[id] { scroll-margin-top: 120px; }

/* Global anchor offset so hashes land below sticky header */
html{ scroll-padding-top: var(--header-offset); scroll-behavior: smooth; }
:target{ scroll-margin-top: var(--header-offset); }
.card[id], h2[id]{ scroll-margin-top: var(--header-offset); }