:root {
  --bg: #0a0a12;
  --bg-soft: #131322;
  --card: #191a2b;
  --text: #f2f3ff;
  --muted: #9ea2c7;
  --neon-cyan: #00f5ff;
  --neon-pink: #ff2bd6;
  --neon-green: #6dff8b;
  --line: #2b2e45;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(80% 60% at 50% 0%, #171a35 0%, var(--bg) 58%);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1rem;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: lowercase;
}

.brand span {
  color: var(--neon-cyan);
  text-shadow: 0 0 10px color-mix(in srgb, var(--neon-cyan) 65%, transparent);
}

.ghost-btn {
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.82rem;
}

.app-shell {
  padding: 1rem;
  padding-bottom: 5.2rem;
  max-width: 760px;
  margin: 0 auto;
}

.hero {
  background: linear-gradient(150deg, #1f2140, #151626);
  border-radius: 20px;
  padding: 1rem;
  margin-bottom: 1rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.neon-border {
  border: 1px solid color-mix(in srgb, var(--neon-pink) 42%, var(--line));
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--neon-cyan) 28%, transparent) inset,
    0 0 18px color-mix(in srgb, var(--neon-pink) 22%, transparent);
}

.chip {
  display: inline-block;
  margin: 0 0 0.45rem;
  font-size: 0.68rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--neon-cyan) 18%, transparent);
  color: var(--neon-cyan);
  letter-spacing: 0.06em;
  font-weight: 700;
}

.hero h1 {
  font-size: 1.45rem;
  line-height: 1.15;
  margin: 0 0 0.45rem;
}

.hero-copy {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.hero-actions {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.btn {
  border-radius: 12px;
  padding: 0.62rem 0.85rem;
  font-weight: 700;
  font-size: 0.85rem;
}

.btn-primary {
  background: linear-gradient(120deg, var(--neon-cyan), #42a1ff);
  color: #02131c;
}

.btn-secondary {
  border: 1px solid color-mix(in srgb, var(--neon-pink) 42%, var(--line));
  background: color-mix(in srgb, var(--neon-pink) 10%, var(--bg-soft));
}

.cards-grid {
  display: grid;
  gap: 0.9rem;
}

.engage-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.28);
}

.card-media {
  height: 118px;
}

.gradient-1 {
  background: linear-gradient(135deg, #343dff, #00e4ff);
}

.gradient-2 {
  background: linear-gradient(135deg, #ff2bd6, #7c4dff);
}

.gradient-3 {
  background: linear-gradient(135deg, #00d38a, #00f5ff);
}

.card-body {
  padding: 0.85rem;
}

.meta {
  margin: 0 0 0.3rem;
  color: var(--neon-green);
  font-size: 0.74rem;
  font-weight: 700;
}

.engage-card h2 {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  line-height: 1.25;
}

.desc {
  margin: 0 0 0.7rem;
  color: var(--muted);
  font-size: 0.87rem;
}

.stats {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  color: #d6d8f2;
  font-size: 0.76rem;
}

.mobile-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-top: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.mobile-nav a {
  text-align: center;
  padding: 0.75rem 0.25rem;
  font-size: 0.74rem;
  color: #abb0d2;
  font-weight: 600;
}

.mobile-nav a.active {
  color: var(--neon-cyan);
  text-shadow: 0 0 10px color-mix(in srgb, var(--neon-cyan) 60%, transparent);
}

@media (min-width: 640px) {
  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .engage-card:first-child {
    grid-column: 1 / -1;
  }

  .hero h1 {
    font-size: 1.8rem;
  }
}