/* ==========================================================================
   Signature element: the "Constellation" — every book in a user's library is
   plotted as a star; completed books glow gold, currently-reading books
   pulse violet. Used on the dashboard and as an ambient motif elsewhere.
   ========================================================================== */
.constellation {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(124,92,191,0.25), transparent 55%),
    radial-gradient(ellipse at 80% 70%, rgba(212,169,79,0.14), transparent 50%),
    linear-gradient(180deg, var(--navy-900), var(--purple-900));
  border: 1px solid var(--border-subtle);
  min-height: 220px;
}
.constellation svg { width: 100%; height: 100%; display: block; }
.constellation .star { transition: r var(--duration-base) var(--ease-out); }
.constellation .star:hover { r: 5; }

/* --- Book card (grid) --- */
.book-card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--duration-base) var(--ease-out), border-color var(--duration-base), box-shadow var(--duration-base);
}
.book-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow-glow-gold); }

.book-card-cover {
  aspect-ratio: 2 / 3;
  width: 100%;
  background: linear-gradient(160deg, var(--purple-800), var(--navy-900));
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
}
.book-card-cover img { width: 100%; height: 100%; object-fit: cover; }
.book-card-cover .no-cover {
  font-family: var(--font-display); color: var(--ink-faint);
  font-size: var(--fs-sm); text-align: center; padding: var(--space-3);
}

.favourite-toggle {
  position: absolute; top: var(--space-2); right: var(--space-2);
  width: 34px; height: 34px; border-radius: var(--radius-full);
  background: rgba(10,12,22,0.55); backdrop-filter: blur(4px);
  color: var(--cream-100); display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,0.15);
  transition: color var(--duration-fast), transform var(--duration-fast);
}
.favourite-toggle[aria-pressed='true'] { color: var(--gold-400); }
.favourite-toggle:hover { transform: scale(1.08); }

.book-card-body { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.book-card-title { font-family: var(--font-display); font-size: var(--fs-md); font-weight: 700; line-height: 1.25; }
.book-card-author { font-size: var(--fs-sm); color: var(--text-secondary); }
.book-card-meta { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-1); }

.progress-track {
  width: 100%; height: 6px; border-radius: var(--radius-full);
  background: rgba(255,255,255,0.08); overflow: hidden;
}
.progress-fill {
  height: 100%; border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--violet-500), var(--gold-400));
}

.rating-stars { color: var(--gold-400); font-size: var(--fs-sm); letter-spacing: 2px; }
.rating-stars .dim { color: var(--border-subtle); }

.book-card-actions { display: flex; gap: var(--space-2); margin-top: auto; padding-top: var(--space-2); }

/* --- List view row --- */
.book-row {
  display: grid;
  grid-template-columns: 56px 2fr 1fr 1fr 1fr auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}
.book-row img { width: 44px; height: 62px; object-fit: cover; border-radius: 4px; }

/* --- Stat tiles --- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--space-4); }
.stat-tile { padding: var(--space-5); }
.stat-tile .stat-value { font-family: var(--font-display); font-size: var(--fs-3xl); font-weight: 700; color: var(--gold-400); }
.stat-tile .stat-label { font-size: var(--fs-sm); color: var(--text-secondary); margin-top: var(--space-1); }

/* --- Chart card --- */
.chart-card { padding: var(--space-5); }
.chart-card h3 { margin-bottom: var(--space-4); }
.chart-canvas-wrap { position: relative; height: 280px; }
.chart-summary { margin-top: var(--space-3); font-size: var(--fs-xs); color: var(--text-faint); }

/* --- Filter bar --- */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center;
  padding: var(--space-4); margin-bottom: var(--space-5);
}
.filter-bar .search-field { flex: 1; min-width: 220px; }
.view-toggle { display: inline-flex; border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); overflow: hidden; }
.view-toggle button { padding: 0.5rem 0.8rem; color: var(--text-faint); }
.view-toggle button[aria-pressed='true'] { background: var(--bg-card-solid); color: var(--gold-400); }

/* --- Modal --- */
.modal-backdrop {
  position: fixed; inset: 0; background: var(--overlay-scrim);
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-4); z-index: 500;
}
.modal { width: 100%; max-width: 560px; padding: var(--space-6); max-height: 90vh; overflow-y: auto; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-5); }

/* --- Pagination --- */
.pagination { display: flex; align-items: center; justify-content: center; gap: var(--space-2); margin-top: var(--space-6); }
.pagination button {
  min-width: 38px; height: 38px; border-radius: var(--radius-sm);
  background: var(--bg-card); border: 1px solid var(--border-subtle); color: var(--text-secondary);
}
.pagination button[aria-current='page'] { background: var(--gold-500); color: var(--navy-950); border-color: var(--gold-500); }

/* --- Hero (shared across landing / auth / discovery banner) --- */
.hero-media {
  position: relative;
  min-height: 560px;
  display: flex; align-items: center;
  overflow: hidden;
  background: linear-gradient(180deg, var(--navy-950), var(--purple-900));
}
.hero-media img.hero-bg {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0.55;
}
.hero-media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,12,22,0.35) 0%, rgba(10,12,22,0.55) 55%, var(--navy-950) 100%);
}
.hero-content { position: relative; z-index: 2; }

/* --- Toggles --- */
.theme-toggle-track {
  width: 52px; height: 28px; border-radius: var(--radius-full);
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  position: relative; display: inline-flex; align-items: center; padding: 2px;
}
.theme-toggle-track .knob {
  width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-400), var(--gold-600));
  transition: transform var(--duration-base) var(--ease-out);
}
[data-theme='light'] .theme-toggle-track .knob { transform: translateX(24px); }

/* --- Profile dropdown --- */
.dropdown { position: relative; }
.dropdown-panel {
  position: absolute; right: 0; top: calc(100% + 8px);
  min-width: 200px; padding: var(--space-2);
  display: none; flex-direction: column; gap: 2px;
  z-index: 200;
}
.dropdown.open .dropdown-panel { display: flex; }
.dropdown-panel a, .dropdown-panel button {
  text-align: left; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm);
  font-size: var(--fs-sm); color: var(--text-secondary); width: 100%;
}
.dropdown-panel a:hover, .dropdown-panel button:hover { background: rgba(212,169,79,0.1); color: var(--gold-400); }

/* --- Mystical divider --- */
.divider-glyph { display: flex; align-items: center; gap: var(--space-3); color: var(--text-faint); margin: var(--space-6) 0; }
.divider-glyph::before, .divider-glyph::after { content: ''; flex: 1; height: 1px; background: var(--border-subtle); }