/* ====== Dark Aurora Theme (refreshed) ====== */
:root{
  --bg:#0a0e14;
  --surface:#0f1724;
  --surface-2:#111b2d;
  --text:#e9ecff;
  --muted:#a6b0cf;
  --primary:#39c6ff;        /* cyan */
  --accent:#ff6ad5;         /* pink */
  --success:#22c55e;
  --warning:#f59e0b;
  --danger:#ef4444;
  --border:#22324a;
  --radius:18px;
  --shadow:0 14px 32px rgba(0,0,0,.48);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:
    radial-gradient(1200px 700px at 10% -10%, rgba(57,198,255,.12), transparent 60%),
    radial-gradient(1200px 700px at 110% 110%, rgba(255,106,213,.08), transparent 60%),
    var(--bg);
  color:var(--text);
  font-family: Inter, system-ui, Segoe UI, Roboto, Arial, Helvetica, sans-serif;
  line-height:1.75;
}

/* Header & Nav */
header{
  position:sticky; top:0; z-index:50;
  background: rgba(12,18,30,0.8);
  backdrop-filter: saturate(135%) blur(12px);
  border-bottom:1px solid var(--border);
}
.header-wrap{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:24px;padding:14px 20px}
.logo img{height:40px;width:auto;display:block;filter:drop-shadow(0 2px 8px rgba(0,0,0,.35));}

nav ul{list-style:none;display:flex;gap:10px;margin:0;padding:0;flex-wrap:wrap}
nav a{
  display:inline-block;padding:10px 14px;border:1px solid transparent;border-radius:999px;
  color:var(--text); opacity:.9; text-decoration:none;
}
nav a:hover{background:var(--surface-2);border-color:var(--border);opacity:1}

/* Hero carousel */
.carousel{max-width:1350px;margin:20px auto 0;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);border:1px solid var(--border)}
.carousel-track{display:flex;gap:0;overflow:hidden}
.carousel-track img{display:none;max-height:650px;width:100%;object-fit:cover}
.carousel-track img.active{display:block}

/* Layout */
.container{max-width:1200px;margin:24px auto;padding:0 16px;display:grid;grid-template-columns:280px 1fr;gap:24px}
.sidebar{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.sidebar h3{margin-top:0}
.sidebar p{color:var(--muted)}

.stack{display:grid;gap:10px}
.goto-button{
  display:block;width:100%;
  padding:12px 16px;border-radius:12px;
  background: linear-gradient(90deg,var(--primary),var(--accent));
  color:white;font-weight:800;text-align:center;text-decoration:none;
  box-shadow: 0 6px 16px rgba(57,198,255,.25);
  transition: transform .08s ease, filter .2s ease;
}
.goto-button:hover{transform:translateY(-1px);filter:saturate(112%)}

main{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
main h1{margin-top:0;letter-spacing:.2px}
section{background:var(--surface-2);border:1px solid var(--border);border-radius:14px;padding:18px;margin:18px 0}
section h2{margin-top:0}

.cta-center{display:flex;justify-content:center;align-items:center;margin:28px 0}
.btn-register{
  display:inline-block;padding:14px 22px;border-radius:999px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  color:#fff;font-weight:800;letter-spacing:.3px;text-transform:uppercase;box-shadow:0 10px 24px rgba(255,106,213,.28);
  text-decoration:none;
}
.btn-register:hover{filter:saturate(115%)}

/* Tables */
table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);
  border-radius:12px;overflow:hidden}
th,td{border-bottom:1px solid var(--border);padding:12px 10px;text-align:left}
th{background:#1b2333;font-weight:800}
tr:hover td{background:rgba(57,198,255,0.06)}

/* Footer */
footer{border-top:1px solid var(--border);padding:28px 16px;background:#0e121a;margin-top:32px}
.footer-content{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px}
.footer-logo img{height:28px;filter:grayscale(10%) brightness(110%)}

/* Responsive */
@media (max-width: 1024px){
  .container{grid-template-columns:1fr}
  .sidebar{order:2}
  main{order:1}
}