/* Hallmark · genre: historical educational · macrostructure: photographic observation and cooperation · design-system: design.md
 * pre-emit critique: P4 H4 E4 S5 R5 V4.
 * Photographic chapter with separate marching, assault and result readings. */
.bridge-reading{--p5-paper:#fff;--p5-ink:#24292c;--p5-muted:#53616a;--p5-red:#8b271f;--p5-rule:#dce1e4;--p5-photo:#edf0f2;--p5-white:#fff;--p5-glass:#24292ccf;--p5-clear:transparent;--p5-font:var(--cover-body);--p5-heading:var(--entry-heading)}
body[data-page='5']{--header:env(safe-area-inset-top);--footer:calc(60px + env(safe-area-inset-bottom));--p5-paper:#fff;--p5-ink:#24292c;--p5-muted:#53616a;--p5-red:#8b271f;--p5-rule:#dce1e4}
body[data-page='5'] .deck-nav{display:none}
.bridge.bridge-reading{grid-template-rows:auto minmax(0,1fr) auto auto;gap:0;background:var(--p5-paper);color:var(--p5-ink);font-family:var(--p5-font)}
.bridge-reading .bridge-heading{max-width:none;background:var(--p5-red);color:var(--p5-white);padding:18px var(--gutter) 16px}
.bridge-reading .eyebrow{font:400 12px/1.6 var(--p5-font);letter-spacing:.02em;margin-bottom:8px;color:var(--p5-white)}
.bridge-reading .bridge-heading h2{font:700 clamp(34px,10vw,52px)/1.22 var(--p5-heading);letter-spacing:.02em}
.bridge-reading .bridge-lead{font:400 15px/1.7 var(--p5-font);margin-top:10px;max-width:680px;color:var(--p5-white)}
.bridge-reading .p5-compact{display:none}
.bridge-reading .bridge-exhibit{display:grid;grid-template-rows:minmax(0,1fr) auto;min-height:106px;max-width:none;overflow:clip;background:var(--p5-photo)}
.bridge-reading .bridge-exhibit:after{content:none}
.bridge-reading .bridge-photo{display:block;position:relative;width:100%;height:100%;min-height:0;overflow:clip;background:var(--p5-photo);border-radius:0;transform:none;touch-action:manipulation}
.bridge-reading .bridge-photo img{width:100%;height:100%;object-fit:cover;object-position:50% 51%}
.bridge-reading .bridge-exhibit[data-material='relic'] img{object-fit:cover;object-position:50% 51%}
.bridge-reading .bridge-photo-tag{position:absolute;left:var(--gutter);top:10px;max-width:calc(100% - 2*var(--gutter));padding:3px 7px;background:var(--p5-glass);color:var(--p5-white);font:400 11px/1.5 var(--p5-font);pointer-events:none}
.bridge-reading .bridge-photo-expand{position:absolute;right:var(--gutter);bottom:8px;display:flex;align-items:center;gap:7px;min-height:44px;padding:0 11px;background:var(--p5-glass);color:var(--p5-white);font:400 12px/1 var(--p5-font);pointer-events:none}
.bridge-photo-expand svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round}
.bridge-reading .bridge-exhibit figcaption{position:static;font:400 12px/1.55 var(--p5-font);padding:5px var(--gutter);color:var(--p5-muted);background:var(--p5-paper);min-height:28px}
.bridge-reading .bridge-material-controls{display:flex;align-items:center;gap:0;max-width:none;padding:0 var(--gutter);border-bottom:1px solid var(--p5-rule)}
.bridge-material-controls button{min-height:44px;white-space:nowrap;font:500 13px/1.5 var(--p5-font);padding:0 12px;color:var(--p5-muted);border-bottom:2px solid var(--p5-clear);border-radius:0;transform:none}
.bridge-material-controls button:first-child{padding-left:0;padding-right:16px}
.bridge-material-controls button[aria-pressed='true']{color:var(--p5-red);border-bottom-color:var(--p5-red);font-weight:700}
.bridge-material-controls .bridge-reading-open{margin-left:auto;padding-right:0;color:var(--p5-ink);font-weight:400}
.bridge-reading-open span{color:var(--p5-red);margin-left:3px}
.bridge-reading .bridge-story{padding:16px var(--gutter) 8px;display:grid;gap:10px;max-width:none;font:400 15px/1.7 var(--p5-font);color:var(--p5-ink)}
.bridge-story p>strong:first-child{color:var(--p5-red);font-weight:700;white-space:nowrap}
.bridge-story .bridge-count{color:var(--p5-red);font-weight:700}
.bridge-story .bridge-result{padding-top:10px;border-top:1px solid var(--p5-rule);font-size:14px;color:var(--p5-muted)}
body[data-page='5'] .deck-footer{color:var(--p5-muted);background:var(--p5-paper);gap:6px}
body[data-page='5'] .deck-footer button{font-size:12px;min-height:44px;text-decoration-color:var(--p5-rule)}
body[data-page='5'] #gesture-hint{font-size:11px;line-height:1.5;white-space:nowrap}
body[data-page='5'] .progress-track{background:var(--p5-rule)}
body[data-page='5'] .progress-track i{background:var(--p5-red)}
.bridge-reading button:focus-visible{outline:2px solid var(--p5-red);outline-offset:-3px}
.bridge-reading .bridge-photo:focus-visible{outline-color:var(--p5-white)}
.bridge-material-controls button:active{background:var(--p5-photo)}
#info-dialog .bridge-role-controls{display:flex;gap:6px;flex-wrap:wrap;margin-block:10px}
#info-dialog .bridge-role-controls button{min-height:44px;padding:8px 10px;white-space:nowrap;border:1px solid var(--rule);font-size:14px;color:var(--ink)}
#info-dialog .bridge-role-controls button[aria-pressed='true']{background:var(--red-deep);border-color:var(--red-deep);color:var(--white)}
#info-dialog .bridge-role-progress{font-size:12px;color:var(--muted)}
@media(hover:hover){.bridge-material-controls button:hover{background:var(--p5-photo)}.bridge-reading .bridge-photo:hover .bridge-photo-expand{background:var(--p5-red)}}
@media(max-height:740px){.bridge-reading .bridge-heading{padding-block:12px}.bridge-reading .bridge-heading h2{font-size:36px}.bridge-reading .bridge-lead{font-size:14px;line-height:1.65;margin-top:7px}.bridge-reading .bridge-story{padding-top:12px;gap:8px;font-size:14px;line-height:1.65}.bridge-story .bridge-result{padding-top:8px}}
@media(max-height:620px){.bridge-reading .p5-full{display:none}.bridge-reading .p5-compact{display:inline}.bridge-reading .bridge-heading{padding-block:8px}.bridge-reading .eyebrow{margin-bottom:4px}.bridge-reading .bridge-heading h2{font-size:30px}.bridge-reading .bridge-lead{margin-top:5px;line-height:1.6}.bridge-reading .bridge-story{padding-top:8px;padding-bottom:4px;gap:6px;line-height:1.6}.bridge-story .bridge-result{padding-top:6px}.bridge-reading .bridge-exhibit figcaption{font-size:11px;padding-block:3px;min-height:23px}.bridge-reading .bridge-exhibit{min-height:101px}.bridge-reading .bridge-photo-tag{top:6px}}
@media(max-width:350px){.bridge-material-controls button{padding-inline:8px;font-size:12px}.bridge-material-controls button:first-child{padding-right:12px}body[data-page='5'] .deck-footer>div:first-child{gap:10px}body[data-page='5'] .deck-footer button{font-size:11px}body[data-page='5'] #gesture-hint{font-size:10px}}
@media(min-width:650px){.bridge-reading .bridge-heading,.bridge-reading .bridge-story,.bridge-reading .bridge-material-controls,.bridge-reading .bridge-exhibit figcaption{padding-inline:max(var(--gutter),calc((100vw - 680px)/2))}.bridge-reading .bridge-story{font-size:18px;gap:14px;padding-block:20px 12px}.bridge-story .bridge-result{font-size:16px}.bridge-reading .bridge-lead{font-size:17px}.bridge-reading .eyebrow{font-size:14px}}
@media(prefers-reduced-motion:reduce){.bridge-reading button{transition:none}}

/* Hallmark · pre-emit critique: P4 H4 E4 S5 R5 V4. P5 mobile reading surfaces. */
.bridge-reading .eyebrow{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;letter-spacing:0}
.bridge-reading .eyebrow>span,.bridge-reading .eyebrow>time{white-space:nowrap}
#info-dialog.p5-detail{--p5-paper:#fff;--p5-ink:#24292c;--p5-muted:#53616a;--p5-red:#8b271f;--p5-rule:#dce1e4;--p5-soft:#edf0f2;--p5-selected:#f9eded;--p5-glass:#24292ccf;--p5-clear:transparent;--p5-font:var(--cover-body);--p5-heading:var(--entry-heading)}
#info-dialog.p5-detail[open]{position:fixed;inset:0;width:100vw;height:100vh;height:100dvh;max-width:none;max-height:none;padding:0;border:0;border-radius:0;margin:0;display:flex;flex-direction:column;overflow:clip;background:var(--p5-paper);color:var(--p5-ink);box-shadow:none}
.p5-detail .drawer-head{position:relative;top:auto;flex:none;display:flex;align-items:center;gap:10px;margin:0;padding:calc(10px + env(safe-area-inset-top)) 16px 10px;background:var(--p5-paper);border-bottom:1px solid var(--p5-rule);min-height:70px}
.p5-detail .drawer-head h2{font:700 20px/1.4 var(--p5-heading);color:var(--p5-ink);flex:1;letter-spacing:0}
.p5-detail .drawer-head button{width:44px;min-width:44px;height:44px;padding:0;flex:none;background:var(--p5-clear);color:var(--p5-ink);border:1px solid var(--p5-rule);border-radius:50%;font:400 13px/1 var(--p5-font);white-space:nowrap}
.p5-detail .drawer-head [data-close]{font-size:0}
.p5-detail .drawer-head [data-close]:after{content:'×';font-size:23px}
.p5-detail-back[hidden]{display:none}
.p5-detail .p5-detail-back{border:0;border-radius:0}
.p5-detail-back svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle}
#info-dialog.p5-detail #info-body{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;touch-action:pan-y;user-select:text;padding:16px 18px calc(24px + env(safe-area-inset-bottom));font:400 15px/1.75 var(--p5-font);color:var(--p5-ink)}
.p5-detail #info-body p{margin-block:10px}
.p5-detail #info-body h3{font:700 18px/1.45 var(--p5-heading);color:var(--p5-red);margin:22px 0 8px;letter-spacing:0}
.p5-detail #info-body h4{font:600 15px/1.6 var(--p5-font);margin:0;color:var(--p5-red)}
.p5-detail #info-body .p5-detail-intro{font-size:15px;color:var(--p5-muted);margin:0 0 20px}
.p5-material-tabs{display:flex;gap:0;border-bottom:1px solid var(--p5-rule);margin-bottom:12px}
.p5-material-tabs button{flex:1;min-height:44px;white-space:nowrap;font:500 14px/1.5 var(--p5-font);border-bottom:2px solid var(--p5-clear);border-radius:0;transform:none}
.p5-material-tabs button[aria-pressed='true']{border-bottom-color:var(--p5-red);color:var(--p5-red);font-weight:700}
.p5-material-figure{margin:0}
.p5-evidence-photo{display:block;position:relative;width:100%;height:auto;aspect-ratio:3/2;overflow:clip;background:var(--p5-soft);border:0;transform:none}
.p5-detail #info-body .p5-evidence-photo img{width:100%;height:100%;max-height:none;object-fit:cover;object-position:center;margin:0}
.p5-material-figure[data-material='relic'] .p5-evidence-photo img{object-fit:contain!important}
.p5-evidence-tag{position:absolute;top:7px;left:7px;max-width:calc(100% - 14px);background:var(--p5-glass);color:var(--p5-paper);padding:2px 6px;font:400 11px/1.6 var(--p5-font)}
.p5-evidence-expand{position:absolute;right:7px;bottom:7px;display:flex;align-items:center;min-height:44px;background:var(--p5-glass);color:var(--p5-paper);padding:0 10px;font-size:12px;white-space:nowrap}
.p5-material-figure figcaption{font:400 11px/1.65 var(--p5-font);color:var(--p5-muted);padding-top:5px;overflow-wrap:anywhere}
.p5-detail #info-body .p5-observation-text{margin:12px 0 16px}
.p5-detail #info-body .p5-cooperation h3{margin-top:0}
.p5-detail #info-body .bridge-role-controls{display:flex;gap:6px;flex-wrap:nowrap;margin:10px 0}
.p5-detail #info-body .bridge-role-controls button{flex:1;min-width:0;min-height:44px;padding:5px 6px;white-space:nowrap;border:1px solid var(--p5-rule);border-radius:4px;font:500 13px/1.5 var(--p5-font);color:var(--p5-ink);background:var(--p5-paper)}
.p5-detail #info-body .bridge-role-controls button[aria-pressed='true']{background:var(--p5-red);border-color:var(--p5-red);color:var(--p5-paper)}
.p5-role-read{display:none}
[data-read='true'] .p5-role-read{display:inline}
.p5-role-reading{padding:12px 0;border-block:1px solid var(--p5-rule)}
.p5-detail #info-body .p5-role-reading p{margin:4px 0 0}
.p5-detail #info-body .bridge-role-progress{font:400 12px/1.6 var(--p5-font);color:var(--p5-muted);margin:8px 0}
.p5-detail #info-body .p5-cooperation-summary{margin:8px 0 12px;font-weight:400}
.p5-cooperation-summary[hidden]{display:none}
.p5-structure,.p5-archive{margin:20px 0;border-block:1px solid var(--p5-rule)}
.p5-structure summary,.p5-archive summary{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:50px;list-style:none;cursor:pointer;font:500 14px/1.6 var(--p5-font);color:var(--p5-ink)}
.p5-structure summary::-webkit-details-marker,.p5-archive summary::-webkit-details-marker{display:none}
.p5-structure summary>span,.p5-archive summary>span{color:var(--p5-red);font-size:18px;flex:none}
.p5-structure[open] summary>span,.p5-archive[open] summary>span{font-size:0}
.p5-structure[open] summary>span:after,.p5-archive[open] summary>span:after{content:'−';font-size:18px}
.p5-detail #info-body .p5-boundary{font:400 12px/1.8 var(--p5-font);color:var(--p5-muted)}
.p5-text-button{display:flex;align-items:center;min-height:44px;text-align:left;font:500 14px/1.5 var(--p5-font);color:var(--p5-red);white-space:nowrap;border-bottom:1px solid var(--p5-rule)}
.p5-detail #info-body .p5-lecture-section{padding-block:0 16px;border-bottom:1px solid var(--p5-rule)}
.p5-detail #info-body .p5-source-heading{font:700 22px/1.4 var(--p5-heading);margin:22px 0 12px;letter-spacing:0}
.p5-detail #info-body .p5-source{border-color:var(--p5-rule);padding-bottom:16px}
.p5-detail #info-body .p5-source h3{font:600 16px/1.7 var(--p5-font);margin:4px 0}
.p5-detail #info-body .p5-source small{font-size:12px;color:var(--p5-muted)}
.p5-detail #info-body a{color:var(--p5-red);overflow-wrap:anywhere;text-decoration-thickness:1px;text-underline-offset:4px}
.p5-detail #info-body .p5-source p>a{display:inline-flex;align-items:center;min-height:44px}
.p5-detail button:focus-visible,.p5-detail summary:focus-visible,.p5-detail a:focus-visible{outline:2px solid var(--p5-red);outline-offset:2px}
@media(hover:hover){.p5-detail .drawer-head button:hover,.p5-material-tabs button:hover{background:var(--p5-soft)}.p5-detail .bridge-role-controls button:not([aria-pressed='true']):hover{background:var(--p5-selected)}}
@media(max-height:620px){.p5-detail .drawer-head{min-height:64px;padding-block:calc(7px + env(safe-area-inset-top)) 7px}.p5-detail .drawer-head h2{font-size:18px}#info-dialog.p5-detail #info-body{padding-top:10px;font-size:14px;line-height:1.7}.p5-material-tabs{margin-bottom:8px}.p5-detail #info-body .p5-observation-text{margin:8px 0 12px}.p5-detail #info-body h3{font-size:17px;margin-block:18px 7px}.p5-material-figure figcaption{font-size:10px}.p5-detail #info-body .bridge-role-controls{margin-block:7px}}
@media(min-width:650px){#info-dialog.p5-detail #info-body{padding-inline:max(24px,calc((100vw - 640px)/2));font-size:17px}.p5-detail .drawer-head{padding-inline:max(18px,calc((100vw - 680px)/2))}.p5-material-figure figcaption{font-size:12px}}
@media(prefers-reduced-motion:reduce){.p5-detail button{transition:none}}


/* Source-photo labels use its 3:2 coordinate frame, never the cropped container. */
.p5-evidence-image{position:absolute;inset:0;width:100%;height:100%}
.p5-detail #info-body .p5-evidence-image img{display:block;object-fit:contain}
.p5-photo-observations{position:absolute;inset:0;pointer-events:none}
.p5-photo-observations[hidden]{display:none}
.p5-photo-mark{position:absolute;transform:translate(-50%,-100%);margin-top:-12px;padding:3px 6px;color:var(--p5-paper);background:var(--p5-glass);font:500 11px/1.5 var(--p5-font);white-space:nowrap}
.p5-photo-mark:after{content:'';position:absolute;left:50%;top:100%;height:12px;border-left:1px solid var(--p5-paper)}
.p5-photo-mark.is-rail{left:33%;top:54%}
.p5-photo-mark.is-board{left:50%;top:82%}
.p5-detail #info-body .p5-structure-note{padding-block:10px;border-block:1px solid var(--p5-rule);font-size:14px;line-height:1.7;color:var(--p5-muted);margin:14px 0 18px}
.p5-structure-note strong{color:var(--p5-ink);font-weight:500;margin-right:8px}
.p5-role-reading[hidden]{display:none}
.p5-detail #info-body .p5-cooperation h3{margin-top:0}
.p5-detail #info-body .p5-text-button{margin-top:16px}
.bridge-story p>strong:first-child{display:inline-block;margin-right:6px}
@media(max-width:350px){.bridge-material-controls .bridge-reading-open{font-size:11px}}

/* Hallmark · P4 H4 E4 S5 R5 V4: a labeled bridge-head view makes 9 + 2 + 2 visible. */
.p5-detail{--p5-wood:#ded5c8;--p5-wood-edge:#998c7d}
.p5-detail #info-body .p5-structure-note p{margin:0}
.p5-structure-open{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-height:44px;color:var(--p5-red);font:500 14px/1.5 var(--p5-font);text-align:left}
.p5-structure-open span{font-size:18px}
.p5-bridge-structure{max-width:600px;margin-inline:auto}
.p5-detail #info-body .p5-view-direction{display:flex;align-items:center;gap:9px;margin:0 0 14px;color:var(--p5-muted);font-size:14px;line-height:1.6}
.p5-view-direction svg{width:22px;height:22px;flex:none;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linejoin:round}
.p5-deck-controls{display:flex;padding:3px;gap:3px;background:var(--p5-soft);border-radius:6px}
.p5-deck-controls button{flex:1;min-width:0;min-height:44px;padding:7px 6px;border-radius:4px;transform:none;white-space:normal;color:var(--p5-muted);font:500 14px/1.4 var(--p5-font)}
.p5-deck-controls button[aria-pressed='true']{background:var(--p5-paper);color:var(--p5-red);box-shadow:0 1px 3px #24292c14;font-weight:700}
.p5-structure-figure{margin:18px 0 12px}
.p5-bridge-diagram{display:block;width:100%;height:auto;max-width:380px;margin-inline:auto;overflow:visible;font-family:var(--p5-font)}
.p5-bridge-diagram path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.p5-diagram-leaders{stroke:var(--p5-muted);stroke-width:1}
.p5-diagram-label{fill:var(--p5-ink);font-size:16px;font-weight:600;text-anchor:middle}
.p5-rails{stroke:var(--p5-ink);stroke-width:4}
.p5-bottom-chain{stroke:var(--p5-red);stroke-width:3}
.p5-chain-number{fill:var(--p5-red);font-size:13px;text-anchor:middle}
.p5-bridge-diagram .p5-board-surface{fill:var(--p5-wood);stroke:var(--p5-wood-edge);stroke-width:1.5}
.p5-board-seams{stroke:var(--p5-wood-edge);stroke-width:1}
.p5-wood-label{fill:var(--p5-ink);font-size:16px;font-weight:600;text-anchor:middle}
.p5-wood-deck{opacity:1;transform:translateY(0);transition:opacity 220ms ease,transform 220ms ease;pointer-events:none}
[data-deck-view='uncovered'] .p5-wood-deck{opacity:0;transform:translateY(-12px)}
.p5-bottom-label{fill:var(--p5-ink);font-size:16px;font-weight:600;text-anchor:middle}
.p5-structure-figure figcaption{margin-top:12px;color:var(--p5-muted);font:400 12px/1.7 var(--p5-font)}
.p5-detail #info-body .p5-deck-explanation{margin:16px 0 12px;min-height:3.5em}
.p5-detail #info-body .p5-structure-total{padding-block:12px;border-block:1px solid var(--p5-rule);margin:12px 0;font-size:14px;line-height:1.7}
.p5-detail #info-body .p5-structure-boundary{color:var(--p5-muted);font-size:12px;line-height:1.8}
.p5-structure-source{display:flex;align-items:center;min-height:44px;font-size:12px;line-height:1.7}
@media(max-width:350px){.p5-deck-controls button{font-size:13px}.p5-detail #info-body .p5-structure-total{font-size:13px}}
@media(prefers-reduced-motion:reduce){.p5-wood-deck{transition:none}}

/* Hallmark · pre-emit critique: P4 H4 E4 S5 R5 V4. Landscape separates media from its tappable reading controls. */
@media(orientation:landscape) and (max-height:600px){
 .bridge.bridge-reading{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);grid-template-rows:auto auto minmax(0,1fr);column-gap:16px}
 .bridge-reading .bridge-heading{grid-column:1/3;padding:7px var(--gutter)}
 .bridge-reading .bridge-heading h2{font-size:28px}.bridge-reading .eyebrow{font-size:11px;margin-bottom:3px}.bridge-reading .bridge-lead{font-size:14px;line-height:1.5;margin-top:4px}
 .bridge-reading .bridge-exhibit{grid-column:1;grid-row:2/4;min-height:0;max-width:none}
 .bridge-reading .bridge-exhibit figcaption{padding:4px 12px;font-size:11px;line-height:1.5;min-height:0}
 .bridge-reading .bridge-material-controls{grid-column:2;grid-row:2;padding:0 var(--gutter) 0 0;min-height:44px}
 .bridge-material-controls button{padding-inline:8px;font-size:12px}.bridge-material-controls button:first-child{padding-right:10px}
 .bridge-material-controls .bridge-reading-open{font-size:11px}
 .bridge-reading .bridge-story{grid-column:2;grid-row:3;align-self:start;padding:7px var(--gutter) 4px 0;font-size:14px;line-height:1.55;gap:7px}
 .bridge-story .bridge-result{font-size:14px;padding-top:6px}
}