* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0c;
  --surface: #18181b;
  --surface-elev: #1f1f23;
  --border: #2a2a2e;
  --text: #f5f5f7;
  --text-dim: #a8a8ad;
  --text-mute: #6c6c70;
  --accent: #03aa5a;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Segoe UI', sans-serif;
  min-height: 100%;
}

body {
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(3, 170, 90, 0.12), transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(99, 102, 241, 0.10), transparent 70%),
    var(--bg);
  background-attachment: fixed;
}

.hub {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

.hub__header {
  text-align: center;
  margin-bottom: 56px;
}
.hub__title {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #f5f5f7, #a8a8ad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hub__subtitle {
  margin-top: 12px;
  color: var(--text-dim);
  font-size: 1rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: rgba(3, 170, 90, 0.5);
  transform: translateY(-2px);
}

.card__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.3rem;
  color: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.card__icon--green { background: linear-gradient(135deg, #03aa5a, #029048); }
.card__icon--blue { background: linear-gradient(135deg, #3b82f6, #1e40af); }
.card__icon--purple { background: linear-gradient(135deg, #a855f7, #6d28d9); }
.card__icon--orange { background: linear-gradient(135deg, #f97316, #c2410c); }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.badge--active {
  background: rgba(3, 170, 90, 0.15);
  color: #6ee7a8;
  border: 1px solid rgba(3, 170, 90, 0.3);
}
.badge--planned {
  background: rgba(168, 168, 173, 0.1);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

.card__title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.card__desc {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.5;
}

.card__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.card__features li {
  font-size: 0.85rem;
  color: var(--text-dim);
  padding-left: 20px;
  position: relative;
}
.card__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.card__tags span {
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--surface-elev);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
  font-family: 'SF Mono', 'Monaco', monospace;
}

.card__cta {
  margin-top: auto;
  display: block;
  text-align: center;
  padding: 12px;
  background: var(--surface-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s, border-color 0.2s;
}
.card__cta:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.hub__footer {
  margin-top: 72px;
  text-align: center;
  color: var(--text-mute);
  font-size: 0.85rem;
}
.hub__footer strong { color: var(--text-dim); font-weight: 600; }

@media (max-width: 640px) {
  .hub { padding: 40px 16px 64px; }
  .hub__title { font-size: 2rem; }
  .cards { grid-template-columns: 1fr; }
}