:root {
  color-scheme: dark;
  --bg: radial-gradient(circle at top right, rgba(100, 169, 255, 0.25), transparent 55%),
         radial-gradient(circle at 20% 30%, rgba(66, 211, 146, 0.18), transparent 50%),
         #05060a;
  --panel: rgba(15, 18, 28, 0.9);
  --border: rgba(255, 255, 255, 0.08);
  --text: #f4f7fb;
  --muted: #94a3b8;
  --accent: #64a9ff;
  --shadow: 0 20px 40px rgba(0, 0, 0, 0.55);
  --font: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  padding: clamp(1.5rem, 3vw, 3rem);
}

.app {
  width: min(960px, 100%);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

header {
  padding: 2.25rem;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
}

header h1 {
  margin: 0.4rem 0 0.6rem;
  font-size: clamp(2rem, 4vw, 2.9rem);
}

header .pill {
  display: inline-flex;
  align-items: center;
  font-size: 0.8rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
}

header .intro {
  margin: 0;
  color: var(--muted);
  max-width: 46ch;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  padding: 1.75rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: rgba(8, 10, 16, 0.85);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(100, 169, 255, 0.6);
}

.card.ghost {
  opacity: 0.5;
  cursor: default;
}

.card .kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0;
}

.card h2 {
  margin: 0.5rem 0;
  font-size: 1.35rem;
}

.card .detail {
  margin: 0;
  color: var(--muted);
  line-height: 1.4;
}

@media (max-width: 600px) {
  header {
    padding: 1.5rem;
  }
  .card {
    padding: 1.5rem;
  }
}