:root{
  --bg:#0b1220;
  --card:#111a2e;
  --text:#eaf0ff;
  --muted:#b8c2e0;
  --brand:#5eead4;
  --brand2:#60a5fa;
  --border:rgba(255,255,255,.12);
  --shadow: 0 12px 32px rgba(0,0,0,.35);
  --radius: 18px;
  --max: 1120px;
  --focus: 0 0 0 4px rgba(94,234,212,.35);
  color-scheme: dark;
}

*{box-sizing:border-box}
html:focus-within{scroll-behavior:smooth}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height:1.55;
  background:
    radial-gradient(900px 600px at 20% 10%, rgba(94,234,212,.18), transparent 60%),
    radial-gradient(900px 600px at 80% 0%, rgba(96,165,250,.20), transparent 55%),
    var(--bg);
  color:var(--text);
}

a{color:inherit}
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible{
  outline:none; box-shadow: var(--focus); border-radius: 12px;
}

.container{max-width: var(--max); margin: 0 auto; padding: 0 1rem;}
.small{font-size:.95rem}
.muted{color:var(--muted)}
.hr{border:0; border-top:1px solid var(--border); margin: 1.4rem 0}

/* Skip link */
.skip-link{
  position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left: 1rem; top: 1rem; width:auto; height:auto;
  padding:.75rem 1rem;
  background: #0f1a33;
  border: 1px solid var(--border);
  border-radius: 12px;
  z-index: 9999;
}

/* Header / Nav */
header{
  position: sticky; top:0; z-index:50;
  backdrop-filter: blur(10px);
  background: rgba(11,18,32,.72);
  border-bottom: 1px solid var(--border);
}
.navbar{
  display:flex; align-items:center; justify-content:space-between;
  padding: .9rem 0;
  gap:1rem;
}
.brand{
  display:flex; align-items:center; gap:.7rem; text-decoration:none;
  font-weight: 850; letter-spacing:.2px;
}
.logo{
  width: 38px; height:38px; border-radius: 12px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: var(--shadow);
}
.nav-toggle{
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
  border-radius: 12px;
  padding: .55rem .75rem;
  display:none;
}
nav ul{
  display:flex; gap:.6rem; list-style:none; padding:0; margin:0;
  align-items:center; flex-wrap:wrap;
}
nav a{
  text-decoration:none;
  padding:.55rem .75rem;
  border-radius: 12px;
  border: 1px solid transparent;
  color: var(--muted);
}
nav a:hover{border-color: var(--border); color: var(--text);}
nav a[aria-current="page"]{
  color: var(--text);
  border-color: rgba(94,234,212,.45);
  background: rgba(94,234,212,.08);
}

.cta{
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color:#06101f;
  font-weight: 850;
  border:0;
  padding:.6rem .9rem;
  border-radius: 12px;
  text-decoration:none;
  display:inline-flex;
  gap:.5rem; align-items:center;
  box-shadow: var(--shadow);
  white-space: nowrap;
}

.btn{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
  padding:.65rem .9rem;
  border-radius: 12px;
  text-decoration:none;
  display:inline-flex; align-items:center; gap:.5rem;
}
.btn:hover{background: rgba(255,255,255,.06)}

/* Layout blocks */
main{padding: 2.3rem 0 3rem;}
.hero{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 1.8rem;
  align-items: center;
  padding: 2.2rem 0 1.2rem;
}
.badge{
  display:inline-flex; gap:.5rem; align-items:center;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .35rem .7rem;
  color: var(--muted);
  background: rgba(255,255,255,.04);
  width: fit-content;
}
h1{font-size: clamp(2rem, 3.7vw, 3.1rem); line-height:1.1; margin:.8rem 0;}
h2{font-size:1.55rem; margin:0 0 .4rem;}
.lead{color: var(--muted); font-size: 1.05rem; max-width: 65ch;}
.panel{
  background: rgba(17,26,46,.75);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}
.section{margin-top: 2.3rem;}
.grid-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}
.grid-2{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}
.card{
  border: 1px solid var(--border);
  background: rgba(17,26,46,.65);
  border-radius: var(--radius);
  padding: 1.1rem;
  box-shadow: var(--shadow);
}
.card h3{margin:.2rem 0 .4rem; font-size:1.1rem}
.card p{margin:.25rem 0; color: var(--muted)}
.tag{
  display:inline-flex;
  border: 1px solid var(--border);
  padding: .25rem .55rem;
  border-radius: 999px;
  font-size: .85rem;
  color: var(--muted);
  background: rgba(255,255,255,.03);
}
.list{margin:.75rem 0 0; padding-left: 1.1rem; color: var(--muted);}
.list li{margin:.35rem 0}

.hero-actions{display:flex; gap:.75rem; flex-wrap:wrap; margin: 1.1rem 0 0;}

details{
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255,255,255,.03);
  padding: .85rem .95rem;
}
summary{cursor:pointer; font-weight:750}
details p{color: var(--muted); margin: .5rem 0 0}

figure{margin:0}
figure img{
  width:100%;
  height:auto;
  border-radius: 16px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
}
figcaption{color:var(--muted); margin-top:.5rem; font-size:.95rem}

/* Forms */
label{display:block; margin-top:.8rem; font-weight:650}
input, textarea, select{
  width:100%;
  margin-top:.35rem;
  border-radius: 12px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
  padding:.7rem .8rem;
}
textarea{min-height: 140px; resize: vertical;}
.help{color:var(--muted); font-size:.93rem; margin-top:.35rem}

/* Footer */
footer{
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  color: var(--muted);
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 1rem;
  align-items:start;
}
.footlinks{display:flex; gap:.7rem; flex-wrap:wrap}
.footlinks a{color: var(--muted); text-decoration:none}
.footlinks a:hover{color: var(--text); text-decoration:underline}

/* Responsive */
@media (max-width: 900px){
  .hero{grid-template-columns: 1fr;}
  .grid-3{grid-template-columns: 1fr;}
  .grid-2{grid-template-columns: 1fr;}
  .footer-grid{grid-template-columns: 1fr;}
  .nav-toggle{display:inline-flex;}
  nav[data-collapsible="true"] ul{display:none;}
  nav[data-collapsible="true"][data-open="true"] ul{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:.4rem;
    margin-top:.6rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  html:focus-within{scroll-behavior:auto}
  *{transition:none !important; animation:none !important}
}