:root {
  --bg: #0c0c0c;
  --text: #f2f0ea;
  --muted: #8a8880;
  --line: #2a2a28;
  --accent: #e8c547;
}

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

html,
body {
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Outfit", "Noto Sans JP", sans-serif;
}

.hub {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
}

.hub-eyebrow {
  font-family: "Space Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hub h1 {
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.hub-sub {
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 2.5rem;
}

.sample-cards {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sample-card {
  display: block;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}

.sample-card:hover {
  border-color: var(--accent);
  background: rgba(232, 197, 71, 0.06);
  transform: translateX(4px);
}

.sample-card-num {
  font-family: "Space Mono", monospace;
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.35rem;
}

.sample-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.sample-card-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

.hub-footer {
  margin-top: 3rem;
  font-size: 0.8rem;
  color: var(--muted);
}