/* River & Ridge Read Water visual-teaching system */
.rw-intro-pair,.rw-teach-pair{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(280px,.92fr);gap:20px;align-items:stretch;margin:28px 0}
.rw-photo-card,.rw-diagram-card{margin:0;overflow:hidden;border:1px solid var(--line-dark);border-radius:16px;background:#fff;box-shadow:0 14px 36px rgba(18,57,47,.08)}
.rw-diagram-card{position:relative}
.rw-photo-card img{display:block;width:100%;aspect-ratio:16/10;object-fit:cover}
.rw-diagram-card img{display:block;width:100%;aspect-ratio:16/10;object-fit:contain;background:#f4efe6;padding:10px}
.rw-diagram-card img.rw-enlargeable{cursor:zoom-in}
.rw-diagram-card img.rw-enlargeable:focus{outline:3px solid #b48734;outline-offset:-4px}
.rw-enlarge-hint{position:absolute;top:12px;right:12px;z-index:2;padding:7px 10px;border-radius:999px;background:rgba(3,17,13,.88);color:#f7f1df;font-size:.67rem;font-weight:800;letter-spacing:.04em;box-shadow:0 4px 14px rgba(0,0,0,.18);pointer-events:none}
.rw-photo-card figcaption,.rw-diagram-card figcaption{padding:19px 20px}
.rw-photo-card figcaption>span,.rw-diagram-card figcaption>span{display:block;margin-bottom:8px;color:#856328;font-size:.62rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase}
.rw-photo-card h3,.rw-diagram-card h3{margin:0 0 8px;color:#173d32}
.rw-photo-card p,.rw-diagram-card p{margin:0;color:#56645d;font-size:.88rem;line-height:1.55}
.rw-photo-card small,.rw-diagram-card small{display:block;margin-top:13px;padding-top:12px;border-top:1px solid rgba(23,61,50,.12);color:#6b7771;font-size:.72rem;line-height:1.5}
.rw-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:24px 0 30px}
.rw-flow article{position:relative;padding:18px 16px;border:1px solid var(--line-dark);border-radius:14px;background:#fff}
.rw-flow article:not(:last-child):after{content:'→';position:absolute;right:-11px;top:50%;z-index:2;transform:translateY(-50%);display:grid;width:22px;height:22px;place-items:center;border-radius:50%;background:#e7ddce;color:#765721;font-weight:900}
.rw-flow b{display:block;margin-bottom:5px;color:#806027;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase}
.rw-flow strong{display:block;color:#173d32}
.rw-flow p{margin:6px 0 0;color:#68746e;font-size:.8rem;line-height:1.45}
.rw-section-label{margin:0 0 8px;color:#856328;font-size:.68rem;font-weight:850;letter-spacing:.12em;text-transform:uppercase}
.rw-evidence-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:25px 0}
.rw-evidence-grid .ri-field-evidence{height:100%}
.rw-evidence-grid .ri-field-evidence img{aspect-ratio:16/10}
.rw-single{max-width:760px;margin:28px auto}
.rw-reference{margin-top:28px}
.rw-reference-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px;margin-top:14px}
.rw-reference-card{margin:0;overflow:hidden;border:1px solid var(--line-dark);border-radius:13px;background:#fff}
.rw-reference-card img{display:block;width:100%;aspect-ratio:16/11;object-fit:contain;background:#f3ede3;padding:10px}
.rw-reference-card figcaption{padding:13px 14px;color:#66716c;font-size:.78rem;line-height:1.45}
.rw-reference-card strong{display:block;margin-bottom:4px;color:#173d32;font-size:.88rem}
.rw-gap-note{padding:18px 20px;border:1px dashed #b99b64;border-radius:13px;background:#faf6ed;color:#5f645f;font-size:.86rem;line-height:1.55}
.rw-gap-note strong{color:#173d32}
.rw-lightbox{width:min(96vw,1100px);max-width:none;padding:0;border:0;border-radius:16px;background:#0b1713;color:#f7f1df;box-shadow:0 24px 80px rgba(0,0,0,.48)}
.rw-lightbox::backdrop{background:rgba(0,0,0,.78)}
.rw-lightbox-inner{position:relative;padding:44px 12px 14px}
.rw-lightbox img{display:block;max-width:100%;max-height:82vh;width:auto;height:auto;margin:auto;background:#f4efe6}
.rw-lightbox-close{position:absolute;top:8px;right:8px;min-width:44px;min-height:44px;border:1px solid rgba(247,241,223,.38);border-radius:999px;background:#152b24;color:#fff;font-size:1.35rem;line-height:1;cursor:pointer}
.rw-lightbox-caption{margin:10px 44px 0 8px;color:#e8dfcb;font-size:.82rem;line-height:1.4}
@media(max-width:900px){.rw-intro-pair,.rw-teach-pair{grid-template-columns:1fr}.rw-flow{grid-template-columns:1fr 1fr}.rw-flow article:nth-child(2):after{display:none}.rw-reference-grid{grid-template-columns:1fr}}
@media(max-width:650px){.rw-flow,.rw-evidence-grid{grid-template-columns:1fr}.rw-flow article:after{display:none}.rw-photo-card img,.rw-evidence-grid .ri-field-evidence img{aspect-ratio:4/3}.rw-diagram-card img{aspect-ratio:auto;height:auto;object-fit:contain}.rw-reference-card img{aspect-ratio:4/3}.rw-single{margin:22px 0;max-width:none}.rw-enlarge-hint{top:9px;right:9px;font-size:.62rem}.rw-lightbox{width:100vw;min-height:100dvh;border-radius:0}.rw-lightbox-inner{display:flex;min-height:100dvh;flex-direction:column;justify-content:center;padding:54px 8px 16px}.rw-lightbox img{max-height:84dvh}.rw-lightbox-caption{margin:10px 52px 0 8px}}
@media print{.rw-photo-card,.rw-diagram-card,.rw-reference-card{break-inside:avoid;box-shadow:none}.rw-flow article:after,.rw-enlarge-hint,.rw-lightbox{display:none}}