/* Material library: shared colours and type come from site.css. */
.library-main {
  padding-block:76px 104px;
}
.library-heading {
  max-width:850px;
}
.library-back {
  display:inline-flex;
  align-items:center;
  min-height:44px;
  margin:0 0 26px;
  border-radius:6px;
  font-size:15px;
  text-decoration:none;
}
.library-back:hover {
  text-decoration:underline;
}
.library-heading .eyebrow {
  margin-bottom:14px;
}
.library-heading h1 {
  font-size:clamp(44px,6vw,72px);
}
.library-heading .section-intro {
  max-width:720px;
}
.library-tabs {
  display:inline-flex;
  flex-wrap:wrap;
  align-items:stretch;
  gap:6px;
  max-width:100%;
  margin:40px 0 38px;
  padding:6px;
  border:1px solid var(--card-edge);
  border-radius:22px;
  background:var(--paper);
}
.library-tab {
  display:flex;
  flex:1 1 auto;
  align-items:center;
  justify-content:center;
  min-width:0;
  min-height:48px;
  padding:12px 24px;
  border:1px solid transparent;
  border-radius:16px;
  background:transparent;
  color:var(--muted);
  font-size:15px;
  line-height:1.4;
  font-weight:550;
  text-align:center;
  transition:background-color .2s,color .2s,box-shadow .2s;
}
.library-tab:hover {
  background:var(--hover-surface);
  color:var(--ink);
}
.library-tab[aria-selected="true"] {
  background:var(--accent-fill);
  color:var(--accent-ink);
  box-shadow:0 3px 10px var(--soft-shadow);
}
.library-panel {
  min-width:0;
  scroll-margin-top:96px;
}
.library-panel-intro {
  max-width:780px;
  margin-bottom:28px;
}
.library-panel-intro h2 {
  font-size:clamp(28px,3.4vw,40px);
  line-height:1.15;
  letter-spacing:-.035em;
}
.library-panel-intro p {
  max-width:680px;
  margin-top:12px;
  color:var(--muted);
  font-size:17px;
  line-height:1.6;
}
.library-panel .lesson-grid {
  margin-top:28px;
}
.series-list {
  display:grid;
  gap:14px;
}
.series-row {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-width:0;
  padding:26px 30px;
  border:1px solid var(--card-edge);
  border-radius:24px;
  background:var(--paper);
}
.series-identity {
  display:flex;
  align-items:center;
  gap:22px;
  min-width:0;
}
.series-identity > div {
  min-width:0;
}
.series-label {
  color:var(--accent);
}
.series-number {
  flex:none;
  color:var(--ink);
  font:inherit;
  letter-spacing:inherit;
  font-variant-numeric:tabular-nums;
}
.series-identity h2,
.series-identity h3 {
  font-size:25px;
  line-height:1.2;
  letter-spacing:-.025em;
}
.series-title {
  display:flex;
  align-items:center;
  gap:.35em;
}
.series-identity p {
  margin-top:6px;
  color:var(--muted);
  font-size:14px;
  line-height:1.5;
}
.series-actions {
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:flex-end;
  gap:12px;
  flex-shrink:0;
}
.file-year {
  margin-inline-start:.3em;
  white-space:nowrap;
}
.file-pending {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 12px;
  color:var(--muted);
  font-size:14px;
  line-height:1.45;
}
.summary-grid {
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px;
}
.summary-card {
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  min-width:0;
  padding:34px;
  border:1px solid var(--card-edge);
  border-radius:28px;
  background:var(--paper);
}
.summary-card--featured {
  border-color:var(--tint-line);
  background:var(--tint);
}
.summary-kicker {
  margin-bottom:20px;
  color:var(--accent);
  font-size:14px;
  font-weight:600;
  line-height:1.5;
}
.summary-card h2,
.summary-card h3 {
  max-width:100%;
  font-size:29px;
  line-height:1.2;
  letter-spacing:-.035em;
}
.summary-author {
  margin-top:16px;
  color:var(--ink);
  font-size:16px;
  line-height:1.5;
}
.summary-meta {
  margin-top:7px;
  margin-bottom:26px;
  color:var(--muted);
  font-size:14px;
  line-height:1.55;
}
.summary-card .button {
  margin-top:auto;
  max-width:100%;
}
.polybox-note {
  margin-top:64px;
  padding:30px 34px;
  border:1px solid var(--tint-line);
  border-radius:24px;
  background:var(--tint);
}
.polybox-note h2 {
  margin-bottom:12px;
  font-size:26px;
  line-height:1.2;
  letter-spacing:-.03em;
}
.polybox-note > p {
  max-width:780px;
  font-size:17px;
  line-height:1.6;
  color:var(--muted);
}
.polybox-actions {
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px 22px;
  margin-top:22px;
}
.polybox-password {
  color:var(--ink);
  font-size:14px;
  line-height:1.5;
  font-variant-numeric:tabular-nums;
}
.library-all-link {
  margin-top:30px;
}
.library-home-links {
  display:flex;
  flex-wrap:wrap;
  gap:12px 26px;
  margin-top:28px;
}
.library-home-link {
  display:inline-flex;
  align-items:center;
  min-height:44px;
  border-radius:6px;
  color:var(--accent);
  font-size:16px;
  line-height:1.5;
  text-decoration:none;
}
.library-home-link::after {
  content:'›';
  margin-left:8px;
  font-size:21px;
  line-height:1;
}
.library-home-link:hover {
  text-decoration:underline;
}
.library-main .archive-section {
  margin-top:56px;
  padding:40px;
  border-radius:28px;
}
.library-main .archive-section .wrap {
  width:100%;
}
.library-main .archive-section .semester-grid:first-child {
  margin-top:0;
}
@media (max-width:900px) {
  .series-row {
    padding:24px;
    gap:18px;
  }
  .series-identity {
    gap:16px;
  }
  .series-actions {
    gap:10px;
  }
  .summary-card {
    padding:28px;
  }
}
@media (max-width:700px) {
  .library-main {
    padding-block:52px 76px;
  }
  .library-tabs {
    display:flex;
    width:100%;
    margin-top:32px;
  }
  .library-tab {
    padding-inline:16px;
  }
  .series-row {
    align-items:flex-start;
    flex-direction:column;
    gap:20px;
  }
  .series-actions {
    justify-content:flex-start;
  }
  .summary-grid {
    grid-template-columns:1fr;
    gap:18px;
  }
  .library-main .archive-section {
    margin-top:40px;
    padding:28px;
  }
}
@media (max-width:600px) {
  .library-heading h1 {
    font-size:42px;
    letter-spacing:-.045em;
  }
  body[data-page="library"] .library-heading h1 {
    font-size:clamp(30px,7.7vw,42px);
  }
  .library-back {
    margin-bottom:20px;
  }
  .library-tabs {
    margin-bottom:30px;
  }
  .library-panel-intro {
    margin-bottom:24px;
  }
  .library-panel-intro h2 {
    font-size:28px;
  }
  .library-panel-intro p {
    font-size:16px;
  }
  .library-panel .lesson-grid {
    margin-top:24px;
  }
  .series-row {
    padding:24px;
    border-radius:22px;
  }
  .series-identity h2,
  .series-identity h3 {
    font-size:24px;
  }
  .summary-card {
    padding:28px;
    border-radius:24px;
  }
  .summary-card h2,
  .summary-card h3 {
    font-size:26px;
  }
  .polybox-note {
    margin-top:44px;
    padding:26px 24px;
    border-radius:22px;
  }
  .polybox-note > p {
    font-size:16px;
  }
  .polybox-actions {
    gap:14px;
  }
  .library-main .archive-section {
    padding:24px 16px;
  }
  .library-main .archive-section .semester-card {
    padding:24px;
  }
}
@media (max-width:420px) {
  .library-tabs {
    display:grid;
    grid-template-columns:minmax(0,1fr);
    gap:5px;
    padding:6px;
    border-radius:22px;
  }
  .library-tab {
    width:100%;
    min-height:46px;
    padding:11px 12px;
  }
  .series-actions {
    width:100%;
    gap:10px;
  }
  .series-actions .button,
  .series-actions .file-pending {
    flex:1 1 auto;
    padding-inline:16px;
  }
  .summary-card {
    padding:26px 22px;
  }
  .summary-card h2,
  .summary-card h3 {
    font-size:24px;
  }
  .polybox-actions {
    align-items:flex-start;
    flex-direction:column;
  }
  .library-home-links {
    flex-direction:column;
    align-items:flex-start;
    gap:8px;
  }
}