/* Research library: chapter Library cards and the /research/ search page. */

.lib-wrap { max-width: 56rem; }

/* Reference tabs */
.lib-tabs { display: flex; gap: 0; border-bottom: 2px solid var(--ml3t-silver-muted); margin-bottom: 2rem; overflow-x: auto; }
.lib-tab { padding: 0.75rem 1.25rem; font-size: 0.875rem; font-weight: 500; white-space: nowrap; color: var(--ml3t-text-light); border-bottom: 2px solid transparent; margin-bottom: -2px; cursor: pointer; background: none; border-top: none; border-left: none; border-right: none; transition: color 150ms ease, border-color 150ms ease; }
.lib-tab:hover { color: var(--ml3t-text-dark); }
.lib-tab-active { color: var(--ml3t-navy); border-bottom-color: var(--ml3t-amber); font-weight: 600; }
.lib-tab-count { font-size: 0.7rem; font-weight: 600; margin-left: 0.4rem; padding: 0.05rem 0.45rem; border-radius: 0.7rem; background: var(--ml3t-silver-muted); color: var(--ml3t-text-light); vertical-align: middle; }
.lib-tab-active .lib-tab-count { background: var(--ml3t-amber); color: var(--ml3t-navy); }
.lib-panel { animation: libFade 0.2s ease; }
@keyframes libFade { from { opacity: 0; } to { opacity: 1; } }

.lib-section-sub { font-size: 0.85rem; color: var(--ml3t-text-light); margin: 0 0 1.5rem; }

/* Cards */
.lib-card { background: white; border: 1px solid var(--ml3t-silver-muted); border-radius: 0.6rem; padding: 1.25rem 1.4rem; margin-bottom: 1rem; }
.lib-card-head { margin-bottom: 0.5rem; }
.lib-card-badges { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.5rem; }
.lib-badge { font-size: 0.7rem; font-weight: 600; padding: 0.15rem 0.5rem; border-radius: 0.25rem; }
.lib-badge-primary { background: var(--ml3t-amber); color: var(--ml3t-navy); }
.lib-badge-muted { background: var(--ml3t-off-white); color: var(--ml3t-text-light); border: 1px solid var(--ml3t-silver-muted); }
.lib-card-title { font-family: var(--ml3t-font-serif); font-size: 1.02rem; font-weight: 600; color: var(--ml3t-text-dark); line-height: 1.35; text-decoration: none; display: inline; }
a.lib-card-title:hover { color: var(--ml3t-navy); text-decoration: underline; }
.lib-ext-icon { width: 0.8rem; height: 0.8rem; display: inline-block; margin-left: 0.15rem; opacity: 0.4; vertical-align: baseline; }
.lib-card-meta { font-size: 0.8rem; color: var(--ml3t-text-light); margin-top: 0.3rem; }
.lib-tldr { font-size: 0.9rem; line-height: 1.55; color: var(--ml3t-text); margin-top: 0.6rem; }

/* Collapsible */
.lib-details { margin-top: 0.75rem; }
.lib-summary-toggle { cursor: pointer; font-size: 0.8rem; font-weight: 600; color: var(--ml3t-navy); list-style: none; display: inline-flex; align-items: center; gap: 0.35rem; user-select: none; }
.lib-summary-toggle::-webkit-details-marker { display: none; }
.lib-summary-toggle::before { content: "▸"; transition: transform 150ms ease; display: inline-block; }
details[open] .lib-summary-toggle::before { transform: rotate(90deg); }
.lib-summary-close { display: none; }
details[open] .lib-summary-open { display: none; }
details[open] .lib-summary-close { display: inline; }

.lib-body { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--ml3t-silver-muted); }
.lib-sec { margin-bottom: 1.25rem; }
.lib-sec:last-child { margin-bottom: 0; }
.lib-sec-label { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ml3t-amber-dark, #a97e1f); margin-bottom: 0.5rem; }
.lib-prose { font-size: 0.88rem; line-height: 1.6; color: var(--ml3t-text); }
.lib-prose p { margin-bottom: 0.5rem; }
.lib-inline-label { font-weight: 600; color: var(--ml3t-text-dark); }

.lib-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.lib-list-bullet { list-style: disc; padding-left: 1.2rem; gap: 0.3rem; }
.lib-list-bullet li { font-size: 0.86rem; line-height: 1.5; color: var(--ml3t-text); }
.lib-item { border-left: 2px solid var(--ml3t-silver-muted); padding-left: 0.8rem; }
.lib-item-lead { font-size: 0.88rem; line-height: 1.5; color: var(--ml3t-text-dark); font-weight: 500; }
.lib-item-sub { font-size: 0.83rem; line-height: 1.5; color: var(--ml3t-text); margin-top: 0.25rem; }
.lib-muted { color: var(--ml3t-text-light); }
.lib-caveat { color: #9a5b2f; }
.lib-cite { font-size: 0.72rem; color: var(--ml3t-text-light); font-variant: small-caps; }

.lib-chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.6rem; }
.lib-chip { font-size: 0.75rem; background: var(--ml3t-off-white); border: 1px solid var(--ml3t-silver-muted); border-radius: 0.3rem; padding: 0.25rem 0.5rem; color: var(--ml3t-text); }
.lib-chip-k { font-weight: 600; color: var(--ml3t-text-light); }

.lib-quote { border-left: 3px solid var(--ml3t-amber); background: var(--ml3t-off-white); padding: 0.6rem 0.9rem; margin-bottom: 0.6rem; border-radius: 0 0.3rem 0.3rem 0; }
.lib-quote p { font-size: 0.86rem; line-height: 1.55; color: var(--ml3t-text-dark); font-style: italic; }
.lib-quote-foot { font-size: 0.74rem; color: var(--ml3t-text-light); margin-top: 0.3rem; font-style: normal; }

.lib-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.5rem; }
.lib-tag { font-size: 0.72rem; background: var(--ml3t-navy); color: var(--ml3t-warm-white); border-radius: 1rem; padding: 0.15rem 0.6rem; opacity: 0.85; }

/* Locked teaser */
.lib-lock { background: white; border: 1px solid var(--ml3t-silver-muted); border-radius: 0.75rem; padding: 2.5rem 2rem; text-align: center; }
.lib-lock-icon { width: 2.5rem; height: 2.5rem; margin: 0 auto 1rem; color: var(--ml3t-amber); }
.lib-lock-title { font-family: var(--ml3t-font-serif); font-size: 1.4rem; color: var(--ml3t-navy); margin-bottom: 0.6rem; }
.lib-lock-text { font-size: 0.95rem; line-height: 1.6; color: var(--ml3t-text); max-width: 34rem; margin: 0 auto 1.5rem; }
.lib-preview-list { text-align: left; max-width: 34rem; margin: 1.5rem auto; border-top: 1px solid var(--ml3t-silver-muted); }
.lib-preview-item { padding: 0.7rem 0; border-bottom: 1px solid var(--ml3t-silver-muted); }
.lib-preview-title { font-size: 0.88rem; color: var(--ml3t-text-dark); font-weight: 500; }
.lib-preview-meta { font-size: 0.76rem; color: var(--ml3t-text-light); margin-top: 0.15rem; }
.lib-preview-more { font-size: 0.8rem; color: var(--ml3t-text-light); padding-top: 0.7rem; }

.lib-empty { color: var(--ml3t-text-light); font-size: 0.9rem; padding: 2rem 0; text-align: center; }

/* Chapter links on a card (research page) */
.lib-card-chapters { font-size: 0.8rem; color: var(--ml3t-text-light); margin-top: 0.35rem; display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: baseline; }
.lib-card-chapters a { color: var(--ml3t-navy); text-decoration: none; border: 1px solid var(--ml3t-silver-muted); border-radius: 0.25rem; padding: 0.05rem 0.4rem; background: var(--ml3t-off-white); }
.lib-card-chapters a:hover { border-color: var(--ml3t-amber); }

/* Research page: search form and results */
.res-form { background: white; border: 1px solid var(--ml3t-silver-muted); border-radius: 0.6rem; padding: 1rem 1.1rem; margin-bottom: 1.5rem; }
.res-query { display: flex; gap: 0.5rem; }
.res-input { flex: 1; min-width: 0; font-size: 0.95rem; padding: 0.55rem 0.75rem; border: 1px solid var(--ml3t-silver-muted); border-radius: 0.4rem; background: white; color: var(--ml3t-text-dark); }
.res-input:focus { outline: 2px solid var(--ml3t-amber); outline-offset: 0; border-color: var(--ml3t-amber); }
.res-filters { display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; align-items: center; margin-top: 0.85rem; font-size: 0.85rem; color: var(--ml3t-text); }
.res-filters label { display: inline-flex; align-items: center; gap: 0.4rem; }
.res-select, .res-year { height: 2.1rem; font-size: 0.85rem; padding: 0.3rem 0.5rem; border: 1px solid var(--ml3t-silver-muted); border-radius: 0.35rem; background: white; color: var(--ml3t-text-dark); }
.res-select { width: 100%; max-width: 18rem; }
@media (max-width: 640px) { .res-select { max-width: none; } }
.res-year { width: 5.5rem; }
.res-reset { font-size: 0.8rem; color: var(--ml3t-text-light); text-decoration: underline; }
.res-count { font-size: 0.85rem; color: var(--ml3t-text-light); margin-bottom: 1rem; }
.res-pager { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 1.5rem; font-size: 0.85rem; color: var(--ml3t-text-light); }
.lib-hero-link { color: var(--ml3t-warm-white); text-decoration: underline; text-underline-offset: 3px; }
.lib-hero-link:hover { color: var(--ml3t-amber); }