/* Hub homepage — 剧本杀 Quiz catalog */

.hub-page {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
  min-height: 100vh;
}

.hub-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(196, 30, 58, 0.14), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(45, 106, 79, 0.1), transparent),
    radial-gradient(ellipse 50% 30% at 0% 80%, rgba(201, 162, 39, 0.08), transparent),
    var(--bg-deep);
}

.hub-header {
  text-align: center;
  margin-bottom: 2.5rem;
  animation: fadeDown 0.8s ease;
}

.hub-header-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent-gold);
  border: 1px solid var(--border);
  padding: 0.35rem 1rem;
  margin-bottom: 1rem;
}

.hub-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 7vw, 3.2rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-celadon) 45%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.hub-header-sub {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.hub-intro {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 32rem;
  margin: 0 auto 2.5rem;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.hub-card {
  display: flex;
  flex-direction: column;
  background: rgba(18, 18, 26, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow);
}

a.hub-card:hover {
  transform: translateY(-3px);
  border-color: rgba(201, 162, 39, 0.35);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
}

.hub-card--soon {
  cursor: default;
  opacity: 0.55;
  pointer-events: none;
}

.hub-card-cover {
  aspect-ratio: 240 / 340;
  background-color: #0d0d12;
  background-image: url("assets/poster-bg.jpg");
  background-image: image-set(
    url("assets/poster-bg.webp") type("image/webp"),
    url("assets/poster-bg.jpg") type("image/jpeg")
  );
  background-size: cover;
  background-position: center top;
  position: relative;
}

.hub-card-cover--liufang {
  background-image: url("assets/liufang-poster.jpg");
  background-image: image-set(
    url("assets/liufang-poster.png") type("image/png"),
    url("assets/liufang-poster.jpg") type("image/jpeg")
  );
  background-position: center 20%;
}

.hub-card-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5, 5, 8, 0.85) 100%);
}

.hub-card-cover--placeholder {
  background-image: none;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, rgba(26, 26, 40, 0.9), rgba(10, 10, 15, 0.95));
}

.hub-card-cover--placeholder span {
  font-size: 2.5rem;
  color: var(--text-dim);
  opacity: 0.4;
}

.hub-card-body {
  padding: 1.25rem 1.35rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.hub-card-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.hub-card-meta {
  font-size: 0.8rem;
  color: var(--accent-gold);
  margin-bottom: 0.75rem;
}

.hub-card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
}

.hub-card-action {
  margin-top: 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-celadon);
  letter-spacing: 0.05em;
}

.hub-card--soon .hub-card-action {
  color: var(--text-dim);
}

.hub-footer {
  text-align: center;
  margin-top: 3rem;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.hub-back {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.hub-back:hover {
  color: var(--accent-gold);
}