:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --border: #d8dce1;
  --text: #1f2430;
  --text-dim: #5b6472;
  --accent: #1f5fa8;
  --accent-dim: #eaf1fb;
  --radius: 10px;
  --brand-yellow: #f4b400;
  --brand-black: #1a1a1a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
}

.hub-header {
  background: var(--brand-black);
  color: white;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  border-bottom: 4px solid var(--brand-yellow);
}
.hub-logo {
  height: 48px;
  width: auto;
  background: white;
  padding: 6px 10px;
  border-radius: 4px;
  flex-shrink: 0;
}
.hub-header-text { flex: 1; min-width: 0; }
.hub-header h1 { margin: 0 0 4px; font-size: 1.4rem; }
.hub-header .subtitle { margin: 0; opacity: 0.85; font-size: 0.92rem; }

.powered-by {
  margin-left: auto;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.powered-by-label {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.erogn-logo { height: 28px; width: auto; border-radius: 3px; }

main {
  max-width: 1000px;
  margin: 40px auto;
  padding: 0 20px 60px;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.app-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}
.app-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
  border-color: var(--accent);
}
.app-card-icon { font-size: 2.2rem; margin-bottom: 10px; }
.app-card-icon-img { width: 2.2rem; height: 2.2rem; border-radius: 8px; display: block; }
.app-card h2 { margin: 0 0 8px; font-size: 1.15rem; color: var(--text); }
.app-card p { margin: 0; font-size: 0.9rem; color: var(--text-dim); }
.app-card-badge {
  display: inline-block;
  margin-top: 12px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 999px;
}

footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.78rem;
  padding: 20px;
}

@media (max-width: 640px) {
  .hub-header { flex-wrap: wrap; }
  .powered-by { margin-left: 0; }
}