/* Shared styles for the Stories & Lessons library apps. Mirrors the
   reader/writer shell so all four tools feel cohesive. */

.library-page { overscroll-behavior-y: contain; }

.library-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  height: calc(100dvh - var(--header-h, 60px));
}
.library-sidebar {
  border-right: 1px solid var(--color-border);
  background: var(--color-surface);
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.library-sidebar-section { display: flex; flex-direction: column; gap: 0.5rem; }
.library-sidebar-section .label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
}

.library-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.library-list li {
  margin: 0;
  padding: 0;
  list-style: none;
}
.library-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-radius: 9px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  font-size: 0.95rem;
  transition: background-color .12s ease, border-color .12s ease;
}
.library-item:hover {
  background: var(--color-surface-2);
  border-color: var(--color-border);
}
.library-item.is-active {
  background: var(--color-primary-100);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}
.library-item-meta {
  display: block;
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-top: 0.1rem;
}
.library-item.is-active .library-item-meta { color: var(--color-primary); opacity: 0.75; }

.library-main {
  overflow-y: auto;
  padding: 1.25rem 1.75rem 3rem;
  background: var(--color-surface-2);
}
.library-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-muted);
  padding: 5rem 1rem;
  height: 100%;
}
.library-empty .library-empty-mark {
  font-size: 4rem;
  font-family: var(--font-cn);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 1rem;
}
.library-empty p { margin: 0.25rem 0; font-size: 1rem; }

.library-doc {
  max-width: 820px;
  margin: 0 auto;
}
.library-doc h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin: 0 0 0.5rem;
}
.library-doc .doc-meta {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.library-toggles {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.library-toggles .form-check { margin: 0; }

/* Dialogue card */
.library-dialog {
  background: #ffefd1;
  border-left: 4px solid var(--color-primary);
  padding: 1.1rem 1.3rem 0.5rem;
  margin-bottom: 1.5rem;
  border-radius: 0.6rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.library-dialog-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: var(--color-ink);
}
.library-line {
  margin-bottom: 0.9rem;
}
.library-line-hanzi {
  font-size: 1.2rem;
  color: var(--color-ink);
  line-height: 1.5;
}
.library-line-literal,
.library-line-natural {
  font-size: 0.95rem;
  margin-top: 0.25rem;
  padding-left: 0.85rem;
  border-left: 2px solid rgba(0, 0, 0, 0.08);
}
.library-line-literal { color: var(--color-muted); font-style: italic; display: none; }
.library-line-natural { color: var(--color-ink-2); display: none; }
.library-main.show-literal .library-line-literal { display: block; }
.library-main.show-natural .library-line-natural { display: block; }

/* Grammar card */
.library-grammar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}
.library-grammar h2, .library-grammar h3 { color: var(--color-primary); }

@media (max-width: 820px) {
  .library-layout { grid-template-columns: 1fr; }
  .library-sidebar {
    position: fixed;
    z-index: 1040;
    top: 0; left: 0; bottom: 0;
    width: 300px;
    transform: translateX(-100%);
    transition: transform .2s ease;
    box-shadow: 0 0 20px rgba(0,0,0,.15);
  }
  .library-sidebar.open { transform: translateX(0); }
  .sidebar-backdrop {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 1039;
    display: none;
  }
  .sidebar-backdrop.show { display: block; }
}