:root{
  --green: #27F576;
  --cyan:  #27DDF5;
  --white: #FFFFFF;
  --black: #000000;

  --bg: var(--black);
  --text: var(--white);
  --muted: rgba(255,255,255,.75);

  --card: rgba(255,255,255,.06);
  --border: rgba(255,255,255,.12);

  --radius: 18px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(1200px 600px at 15% 0%, rgba(39,245,118,.18), transparent 60%),
    radial-gradient(1000px 500px at 85% 10%, rgba(39,221,245,.18), transparent 60%),
    var(--bg);
  color: var(--text);
}

.header{
  padding: 28px 20px 10px;
}

.brand{
  max-width: 980px;
  margin: 0 auto;
  display:flex;
  align-items:center;
  gap: 16px;
}

.logo-slot{
  width: 78px;
  height: 78px;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(39,245,118,.25), rgba(39,221,245,.25));
  border: 1px solid var(--border);
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow: var(--shadow);
}
.logo-slot span{
  font-weight: 800;
  letter-spacing: .12em;
  font-size: 12px;
  color: rgba(255,255,255,.85);
}

.brand-text h1{
  margin:0;
  font-size: 28px;
  line-height: 1.1;
}
.tagline{
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.container{
  max-width: 980px;
  margin: 0 auto;
  padding: 18px 20px 40px;
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  backdrop-filter: blur(8px);
}

.card h2{
  margin: 0 0 14px;
  font-size: 18px;
  color: rgba(255,255,255,.92);
  font-weight: 700;
}

.links{
  display:grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.link{
  display:block;
  text-decoration:none;
  color: var(--text);
  padding: 16px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.25);
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.link:hover{
  transform: translateY(-1px);
  background: rgba(0,0,0,.35);
  border-color: rgba(39,221,245,.55);
}
.link:focus{
  outline: 2px solid rgba(39,245,118,.75);
  outline-offset: 2px;
}

.link-title{
  display:block;
  font-weight: 800;
  letter-spacing: .01em;
}
.link-sub{
  display:block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.footer{
  margin-top: 14px;
  color: rgba(255,255,255,.70);
  font-size: 13px;
}

@media (min-width: 740px){
  .links{ grid-template-columns: 1fr 1fr; }
  .links a:nth-child(3){ grid-column: span 2; }
}