:root {
  --bg: #0a0a0a;
  --bg-elev: #1a1a1a;
  --bg-deep: #050505;
  --text: #f0f4f8;
  --text-muted: #a0a0a0;
  --text-subtle: #707070;
  --border: #2a2a2a;
  --border-strong: #3a3a3a;

  --hydra-green: #8CD942;
  --hydra-green-dark: #76bc35;
  --hydra-green-tint: rgba(140, 217, 66, 0.12);
  --hydra-navy: #153756;
  --hydra-navy-light: #1f4e79;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45), 0 4px 12px rgba(0, 0, 0, 0.3);

  --radius: 12px;
  --radius-lg: 16px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, rgba(140, 217, 66, 0.10) 0%, transparent 45%),
    radial-gradient(circle at 90% 100%, rgba(46, 163, 242, 0.08) 0%, transparent 45%),
    var(--bg);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-weight: 600; letter-spacing: -.01em; color: var(--text); }
a { color: var(--hydra-green); text-decoration: none; }
a:hover { color: #b0e670; }

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--bg-deep);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: .75rem; }
.brand img { height: 36px; filter: brightness(1.05); }
.brand .divider { width: 1px; height: 24px; background: var(--border); }
.brand h1 { font-size: .9375rem; font-weight: 500; color: var(--text-muted); }
.header-right .back-web { font-size: .875rem; color: var(--text-muted); }
.header-right .back-web:hover { color: var(--text); }

main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 4rem 2rem 3rem;
}
.hero { text-align: center; margin-bottom: 3rem; }
.hero h2 {
  font-size: 2.25rem;
  letter-spacing: -.03em;
  margin-bottom: .75rem;
  color: var(--text);
}
.hero h2 + p,
.hero p {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.hub-grid.two { max-width: 820px; margin-left: auto; margin-right: auto; }

.hub-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: all .2s;
  position: relative;
  overflow: hidden;
  min-height: 240px;
}
.hub-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--hydra-green);
  opacity: 0;
  transition: opacity .2s;
}
.hub-card.available { cursor: pointer; }
.hub-card.available:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
  background: #222222;
}
.hub-card.available:hover::before { opacity: 1; }

.hub-card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius);
  background: var(--hydra-green-tint);
  color: var(--hydra-green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.hub-card.coming-soon .hub-card-icon { background: rgba(255,255,255,0.05); color: var(--text-subtle); }
.hub-card-body { flex: 1; }
.hub-card-body h3 { font-size: 1.25rem; margin-bottom: .5rem; color: var(--text); }
.hub-card-body p { font-size: .9375rem; color: var(--text-muted); line-height: 1.5; }

.hub-card-cta {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--hydra-green);
  font-weight: 600;
  font-size: .9375rem;
  margin-top: .5rem;
  transition: gap .2s;
}
.hub-card.available:hover .hub-card-cta { gap: .875rem; color: #b0e670; }

.soon-pill {
  display: inline-block;
  margin-top: .75rem;
  padding: .25rem .75rem;
  background: rgba(255,255,255,0.06);
  color: var(--text-subtle);
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  border-radius: 999px;
}
.hub-card.coming-soon { opacity: .55; }

.help {
  text-align: center;
  padding: 2rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.help h3 { font-size: 1.0625rem; color: var(--text); margin-bottom: .5rem; }
.help p { color: var(--text-muted); font-size: .9375rem; }
.help a { color: var(--hydra-green); font-weight: 500; }

footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: .8125rem;
  border-top: 1px solid var(--border);
  background: var(--bg-deep);
}
footer a { margin: 0 .75rem; color: var(--hydra-green); }
footer .sep { color: var(--border-strong); }

@media (max-width: 720px) {
  header { padding: .75rem 1rem; }
  .brand h1 { display: none; }
  main { padding: 2rem 1rem; }
  .hero h2 { font-size: 1.75rem; }
  .hub-grid { grid-template-columns: 1fr; gap: 1rem; }
  .hub-card { padding: 1.5rem; min-height: auto; }
}