/* ============================================
   ReadVenture Discover & Library
   Discover feed, Leaderboard, Post modal, Library page
   ============================================ */

/* ── Discover Page ── */
#discoverPage {
  background: var(--grad-drawer);
}

.discover-tabs {
  display: flex;
  gap: 8px;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--border-10);
}

.discover-tab {
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: var(--text-14);
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--anim-normal);
}
.discover-tab.active {
  background: var(--purple-15);
  color: var(--purple-light);
}

/* ── Feed ── */
.feed-list {
  padding: var(--space-md) var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feed-card {
  background: var(--card-feed);
  border-radius: var(--radius-5xl);
  border: 1px solid var(--border-10);
  overflow: hidden;
  cursor: pointer;
  transition: background var(--anim-normal);
}
.feed-card:active {
  background: var(--card-dark);
}

.feed-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
}

.feed-card-body {
  padding: 0 var(--space-lg) var(--space-lg);
}

.feed-card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-2xl);
}

/* ── Leaderboard ── */
.leaderboard-list {
  padding: var(--space-md) var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.leaderboard-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--card-dark);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-10);
}

.leaderboard-rank {
  width: 30px;
  text-align: center;
  font-size: var(--text-18);
  font-weight: 800;
  color: var(--gold);
  flex-shrink: 0;
}

.leaderboard-rank--gold { color: var(--gold); }
.leaderboard-rank--silver { color: var(--silver-light); }
.leaderboard-rank--bronze { color: var(--bronze-dark); }

.leaderboard-avatar {
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  background: var(--grad-ai);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-20);
  flex-shrink: 0;
}

.leaderboard-info {
  flex: 1;
}

.leaderboard-name {
  font-weight: 700;
  font-size: var(--text-15);
  color: var(--text-primary);
}

.leaderboard-xp {
  font-size: var(--text-12);
  color: var(--text-muted);
}

.leaderboard-badge {
  font-size: var(--text-24);
}

/* ── Post / Book Review Modal ── */
#postBookModal {
  position: absolute;
  inset: 0;
  z-index: 340;
  background: var(--grad-overlay);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateY(100%);
  transition: transform var(--anim-overlay) var(--ease-smooth);
  display: flex;
  flex-direction: column;
}
#postBookModal.show {
  transform: translateY(0);
}

.post-form {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.post-input {
  padding: 14px;
  border-radius: var(--radius-2xl);
  background: var(--card-dark);
  border: 1px solid var(--border-15);
  color: var(--text-primary);
  font-size: var(--text-15);
  resize: vertical;
}

.post-stars {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.post-star {
  font-size: var(--text-32);
  cursor: pointer;
  transition: transform var(--anim-normal);
}
.post-star:active {
  transform: scale(1.2);
}

/* ── Library Page ── */
#libraryPage {
  background: var(--grad-drawer);
}

.library-header {
  padding: var(--space-xl) var(--space-xl) var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.library-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
}

.library-book-card {
  background: var(--card-dark);
  border-radius: var(--radius-5xl);
  border: 1px solid var(--border-10);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--anim-normal);
}
.library-book-card:active {
  transform: scale(0.97);
}

.library-book-cover {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--grad-library);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-40);
}

.library-book-info {
  padding: var(--space-md);
}