.dual-papers { margin: 0 0 35px; min-width: 0; scroll-margin-top: 24px; }
.dual-papers-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin: 0 0 15px; }
.dual-papers-heading .eyebrow { margin: 0 0 5px; color: var(--red); font: 700 8px/1.5 ui-monospace, monospace; letter-spacing: .12em; text-transform: uppercase; }
.dual-papers-heading h2 { margin: 0; font: 400 25px/1.2 Georgia, serif; letter-spacing: -.02em; }
.dual-papers-heading > p { max-width: 300px; margin: 0 0 1px; color: var(--muted); font: 10px/1.6 Arial, sans-serif; text-align: right; }
.dual-papers-track { display: grid; grid-auto-flow: column; grid-auto-columns: calc((100% - 32px) / 3); gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; overscroll-behavior-x: contain; scrollbar-width: thin; scrollbar-color: #bac4bb transparent; list-style: none; margin: 0; padding: 4px 2px 13px; touch-action: pan-x pan-y; }
.dual-papers-track > li { min-width: 0; margin: 0; scroll-snap-align: start; }
.dual-paper-card { display: flex; flex-direction: column; min-height: 100%; padding: 11px; border: 1px solid #d3d0c2; background: #faf8f0; box-shadow: 0 2px 4px #243d4007; }
.dual-paper-cover { display: block; overflow: hidden; border: 1px solid #d9d3c6; background: #fbf8f1; box-shadow: 2px 3px 0 #e9e3d7; aspect-ratio: 16 / 21; }
.dual-paper-cover:focus-visible { outline: 2px solid #355d66; outline-offset: 3px; }
.dual-paper-cover img { display: block; width: 100%; height: 100%; object-fit: contain; }
.dual-paper-index { margin: 13px 0 3px; color: var(--red); font: 700 8px/1.4 ui-monospace, monospace; letter-spacing: .09em; text-transform: uppercase; }
.dual-paper-card h3 { margin: 0; font: 400 20px/1.18 Georgia, serif; letter-spacing: -.015em; }
.dual-paper-card h3 a { color: inherit; text-decoration: none; }
.dual-paper-card h3 a:hover, .dual-paper-card h3 a:focus-visible { text-decoration: underline; text-underline-offset: .15em; }
.dual-paper-subtitle { min-height: 3.1em; margin: 6px 0 13px; color: var(--muted); font: 10px/1.55 Arial, sans-serif; }
.dual-paper-links { display: flex; flex-wrap: wrap; gap: 7px 13px; margin-top: auto; padding-top: 10px; border-top: 1px solid var(--line); font: 700 10px/1.4 Arial, sans-serif; }
.dual-paper-links a { color: var(--ink); text-underline-offset: .2em; }
.dual-papers-controls { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 10px 0 0; }
.dual-papers-controls > p { margin: 0; color: var(--muted); font: 10px/1.6 Arial, sans-serif; }
.dual-papers-buttons { display: flex; flex-shrink: 0; align-items: center; gap: 6px; }
.dual-papers-buttons button { min-width: 38px; min-height: 36px; padding: 5px 10px; border: 1px solid var(--line); background: transparent; box-shadow: none; color: var(--ink); font: 16px/1 Arial, sans-serif; }
.dual-papers-buttons button:disabled { cursor: default; opacity: .3; }
.dual-papers-buttons output { min-width: 94px; margin-right: 8px; color: var(--muted); font: 10px/1.6 ui-monospace, monospace; text-align: right; }
.dual-papers .source-line { margin-top: 14px; }

.dual-shelf { background: linear-gradient(90deg, rgba(162, 122, 58, .045), transparent 55%); }
.dual-shelf .book-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.dual-shelf .book-office { color: var(--red); }
.dual-shelf-source { display: flex; flex-wrap: wrap; gap: .45rem 1rem; margin: 1.35rem 0 0; padding-top: .9rem; border-top: 1px solid var(--line); font-size: .75rem; font-weight: 700; }
.dual-shelf-source a { color: var(--ink); text-underline-offset: .2em; }

@media (max-width: 1050px) { .dual-papers-track { gap: 12px; grid-auto-columns: calc((100% - 24px) / 3); } .dual-shelf .book-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 850px) { .dual-papers-track { grid-auto-columns: calc((100% - 16px) / 2); gap: 16px; } .dual-papers-heading > p { max-width: 220px; } .dual-shelf .book-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .dual-papers { margin-bottom: 29px; } .dual-papers-heading { display: block; } .dual-papers-heading h2 { font-size: 25px; } .dual-papers-heading > p { max-width: 320px; margin-top: 8px; text-align: left; } .dual-papers-track { grid-auto-columns: 86%; gap: 14px; padding-bottom: 12px; } .dual-paper-card { padding: 9px; } .dual-papers-controls { align-items: flex-start; gap: 10px; } .dual-papers-controls > p { max-width: 165px; font-size: 10px; } .dual-papers-buttons { gap: 4px; } .dual-papers-buttons output { min-width: 70px; margin-right: 2px; font-size: 9px; } .dual-papers-buttons button { min-width: 34px; padding: 5px 8px; } .dual-shelf .book-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 23rem) { .dual-shelf .book-grid { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { .dual-papers-track { scroll-behavior: auto; } }