/* Teaching materials are readable, precisely typeset samples, separate from results. */
.materials-showcase{padding:68px 0;background:linear-gradient(120deg,#eef4f1,#f8f6ee);color:#244450}
.materials-heading{text-align:center;margin-bottom:36px}.materials-heading h2{font-family:'Noto Serif JP',serif;font-size:clamp(26px,3vw,37px);line-height:1.65;margin:10px 0 18px}.materials-heading p{font-size:16px;line-height:1.9}
.materials-heading .eyebrow{font-weight:700;color:#417664;font-size:14px}
.materials-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:start}
.materials-documents{display:grid;grid-template-columns:1fr;gap:24px;min-width:0}
.material-figure{margin:0;padding:0;background:#fff;border:1px solid #dbe4dd;border-radius:5px;box-shadow:0 9px 28px #173c4b0b}
.material-figure .document-image{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:10/7;object-fit:contain;border-radius:4px 4px 0 0}
.material-figure figcaption{padding:15px 20px;font-size:16px;line-height:1.8;font-weight:700;color:#294c45;background:#fff}
.material-disclosure{font-size:14px;line-height:1.9;color:#4a6268;margin:16px 0 0}
.materials-books{background:#fff;padding:30px;border:1px solid #dbe4dd;border-radius:5px;min-width:0}
.material-label{font-size:14px;font-weight:700;color:#92702e;letter-spacing:.1em;margin:0 0 10px}
.materials-books h3{font-family:'Noto Serif JP',serif;font-size:27px;line-height:1.7;text-align:left;margin:0 0 18px;color:#204b42}
.materials-books>p{line-height:1.9;font-size:15px}
.book-shelf{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:24px}
.book-example{display:flex;flex-direction:column;gap:10px;text-decoration:none;color:#244450;min-width:0}
.book-cover{position:relative;display:grid;place-items:center;width:100%;aspect-ratio:3/4.2;margin-bottom:10px;background:#fff;overflow:hidden;flex:none}
.book-cover>img{position:absolute;inset:0;display:block;width:100%;height:100%;max-width:none;object-fit:contain;filter:drop-shadow(3px 4px 4px #142b3a18)}
/* The publisher's 480px square thumbnail contains the cover at y=36..445.
   Crop only that embedded margin; keep the book's original proportions. */
.book-cover--padded>img{position:absolute;inset:auto;left:50%;top:-8.54%;transform:translateX(-50%);height:117.073%;width:auto;max-width:none;max-height:none;object-fit:fill;filter:none}
.book-example>small{font-size:14px;color:#46715e;line-height:1.6;font-weight:700}
.book-example>strong{font-size:16px;line-height:1.8;font-weight:700}
.book-example>span:not(.book-cover){font-size:14px;text-decoration:underline;line-height:1.8;color:#356e61;margin-top:auto}
.book-example:focus-visible{outline:3px solid #376f62;outline-offset:5px}
.editorial-home .promise-card>.document-image{aspect-ratio:10/7;object-fit:contain;background:#eef4f0}
.editorial-home .editorial-hero-photo img{aspect-ratio:4/3;object-position:50% 18%}
.editorial-eiken .concern-aside>.document-image{aspect-ratio:10/7;object-fit:contain}
.editorial-eiken .resource>.document-image{aspect-ratio:10/7;object-fit:contain}
.editorial-eiken .resource>.material-disclosure{color:#4a6268;margin-top:12px}
@media(min-width:1101px){.materials-documents{grid-template-columns:1fr 1fr;gap:20px}.materials-documents>.material-disclosure{grid-column:1/-1}.materials-layout{grid-template-columns:1.35fr 1fr}}
@media(max-width:900px){.materials-layout{grid-template-columns:1fr;gap:28px}.materials-documents{grid-template-columns:1fr 1fr;gap:20px}.materials-documents>.material-disclosure{grid-column:1/-1}.materials-books{padding:28px}.book-shelf{max-width:620px;margin:24px auto 0}}
@media(max-width:600px){.materials-showcase{padding:48px 0}.materials-documents{grid-template-columns:1fr;gap:20px}.materials-books{padding:22px}.book-shelf{gap:18px}.materials-books h3{font-size:25px}.book-example>strong{font-size:15px}.book-example>span:not(.book-cover){font-size:14px}.materials-heading h2{font-size:26px}.material-figure figcaption{padding:14px 18px;font-size:15px}}