/* Atlas Story Arc Navigator v2 — horizontal chapter map + story-card browser.
 * Editorial interpretation of the NIKKE Explorer design language.
 * Original markup/styles; no website source code is reused.
 */
.arc-nav-header{display:flex;justify-content:space-between;align-items:center;margin:16px 0 8px;color:#b7d4e9;font-weight:800;font-size:10px;letter-spacing:.15em}
.arc-nav-header small{display:inline-block;margin-left:10px;color:#778ea6;letter-spacing:.025em;font-size:10px;font-weight:500}
.arc-navigator{--atlas-cyan:#66d9ed;border:1px solid #2f5674;background:linear-gradient(142deg,#0e2030 0%,#0a1623 58%,#0b1420 100%);border-radius:11px;overflow:hidden;margin:8px 0 18px;box-shadow:0 12px 38px #0005,inset 0 1px #76d9fc14}
.arc-navigation-top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:15px 18px 13px;border-bottom:1px solid #32567466}
.arc-navigation-top>div{min-width:0;display:flex;flex-direction:column;gap:5px}
.arc-kicker{font-size:9px;color:#72b7dc;letter-spacing:.16em;font-weight:900}
.arc-navigation-top strong{display:block;font-size:16px;font-weight:850;letter-spacing:.015em;color:#f3f8ff}
.arc-navigation-top p{font-size:11px;line-height:1.5;margin:0;color:#97b2c8}
.arc-all-button{flex:0 0 auto;font-size:10px;font-weight:850;letter-spacing:.06em;color:#a6c6dd;background:#122c40;border:1px solid #31516b;padding:10px 13px;border-radius:5px}
.arc-all-button.active{background:linear-gradient(120deg,#1a647a,#14435d);color:#e6fdff;border-color:#60bed1;box-shadow:0 0 0 1px #82e5ea22}
.arc-all-button:hover,.arc-all-button:focus-visible{border-color:#83d7e9;color:#f5fbff}
.arc-summary-strip{display:flex;align-items:center;flex-wrap:wrap;gap:8px 18px;padding:10px 18px;font-size:10px;background:#091a28;color:#a5bbcd;border-bottom:1px solid #2741586b}
.arc-summary-strip span{display:inline-flex;gap:5px;align-items:baseline}
.arc-summary-strip b{color:#c8f7ff;font-size:13px;font-variant-numeric:tabular-nums}
.arc-summary-strip .arc-editorial-note{color:#718da5;margin-left:auto;font-size:10px}
.arc-map-scroller{overflow-x:auto;overflow-y:hidden;scrollbar-color:#3e6581 #0b1825;scrollbar-width:thin;background:linear-gradient(180deg,#101d2c,#0b1826);margin:0;padding:8px 13px 6px}
.arc-map-inner{position:relative;min-width:870px;height:146px;isolation:isolate}
.arc-map-guides{position:absolute;inset:0;background:repeating-linear-gradient(to right,transparent 0,transparent calc(9.8039% - 1px),#35506942 calc(9.8039% - 1px),#35506942 9.8039%);pointer-events:none;z-index:-1}
.arc-map-rail{position:absolute;left:0;right:0;height:2px;background:#28516a}
.arc-map-rail-primary{top:23px}.arc-map-rail-secondary{top:84px;background:#3d345e}
.arc-segment{position:absolute;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;min-width:0;gap:2px;border:1px solid hsl(var(--arc-hue),60%,49%);color:#e8f7ff;background:linear-gradient(115deg,hsl(var(--arc-hue),65%,32%,.92),hsl(var(--arc-hue),49%,23%,.88));border-radius:5px;text-align:left;overflow:hidden;padding:7px 10px;box-shadow:inset 0 1px #ffffff18,0 5px 15px #0003;transition:filter .15s,border-color .15s}
.arc-segment.primary{top:10px;height:54px}
.arc-segment.secondary{top:71px;height:40px;background:linear-gradient(115deg,hsl(var(--arc-hue),48%,34%,.86),hsl(var(--arc-hue),40%,18%,.86))}
.arc-segment-label{font-weight:850;letter-spacing:.025em;font-size:11px;width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.arc-segment small{font-size:9px;letter-spacing:.05em;font-weight:750;color:#deebf9b8}
.arc-segment-count{position:absolute;right:8px;top:7px;font-size:8px;font-weight:800;opacity:.7}
.arc-segment:hover,.arc-segment:focus-visible{z-index:5;filter:brightness(1.4);box-shadow:0 0 15px hsl(var(--arc-hue),70%,55%,.35)}
.arc-segment.focused{outline:2px solid hsl(var(--arc-hue),80%,80%);outline-offset:1px;z-index:4}
.arc-chapter-scale{position:absolute;inset:120px 0 0;border-top:1px solid #456c84aa}
.arc-tick{position:absolute;top:0;min-width:46px;padding:6px 2px;border:0;border-left:1px solid #55819b86;background:transparent;color:#82b2d0;font:750 9px/1.1 ui-monospace,Consolas,monospace;text-align:left}
.arc-tick:first-child{margin-left:0}
.arc-tick:last-child{transform:translateX(-100%);border-right:1px solid #55819b86;border-left:0;text-align:right}
.arc-tick:hover,.arc-tick:focus-visible{color:#e3f8ff;background:#284c6788}
.arc-directory{display:flex;align-items:center;gap:6px;padding:8px 13px 10px;overflow-x:auto;scrollbar-width:thin;scrollbar-color:#395a72 #0b1928;background:#0b1927}
.arc-directory-chip{flex:0 0 auto;display:flex;gap:5px;align-items:baseline;border:1px solid hsl(var(--arc-hue),45%,47%,.75);border-left:3px solid hsl(var(--arc-hue),75%,64%);background:hsl(var(--arc-hue),45%,23%,.5);border-radius:4px;color:#d4e9f7;padding:6px 8px;font-size:10px;font-weight:750}
.arc-directory-chip small{font-size:9px;color:#a4bacd;white-space:nowrap}
.arc-directory-chip.active,.arc-directory-chip:hover,.arc-directory-chip:focus-visible{color:#fff;background:hsl(var(--arc-hue),60%,35%,.8);border-color:hsl(var(--arc-hue),80%,70%);}
.arc-story-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:15px 18px 12px;background:#0b1723;border-top:1px solid #3554725c}
.arc-story-heading>div:first-child{display:flex;flex-direction:column;gap:4px}
.arc-story-heading strong{font-size:13px;letter-spacing:.01em;color:#e7f7ff}
.arc-story-controls{display:flex;align-items:center;gap:6px;color:#7fa7c3;font-size:10px;white-space:nowrap}
.arc-story-controls span{margin-right:9px}
.arc-story-controls button{width:27px;height:26px;background:#163248;color:#b1dafa;border:1px solid #365975;border-radius:5px;font-size:16px;line-height:1}
.arc-story-controls button:hover{background:#285b78;border-color:#75b9e8;color:white}
.arc-story-scroller{overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;scrollbar-color:#315470 #081422;overscroll-behavior-x:contain;padding:0 17px 14px}
.arc-story-rail{display:flex;gap:10px;min-height:204px}
.arc-story-card{flex:0 0 165px;display:flex;flex-direction:column;min-width:0;background:#152636;border:1px solid #35556c;color:#d5e7f4;border-radius:6px;text-align:left;overflow:hidden;padding:0;transition:transform .15s,border-color .15s}
.arc-story-card:hover,.arc-story-card:focus-visible{transform:translateY(-3px);border-color:hsl(var(--story-hue),80%,69%);box-shadow:0 8px 20px #0007}
.arc-story-art{height:103px;display:block;position:relative;background:linear-gradient(130deg,hsl(var(--story-hue),35%,28%),#081825);overflow:hidden}
.arc-story-art:after{content:"";position:absolute;inset:auto 0 0;height:45px;background:linear-gradient(transparent,#091420c9);pointer-events:none}
.arc-story-art img{display:block;width:100%;height:100%;object-fit:cover}
.arc-story-fallback{height:100%;display:grid;place-items:center;color:hsl(var(--story-hue),70%,70%);font-size:45px}
.arc-story-type{position:absolute;left:7px;bottom:7px;background:hsl(var(--story-hue),54%,34%,.92);border:1px solid hsl(var(--story-hue),65%,62%,.7);color:#f3fbff;font-size:8px;font-weight:850;letter-spacing:.07em;padding:3px 5px;border-radius:3px;z-index:1}
.arc-story-data{display:flex;flex-direction:column;gap:7px;padding:9px 9px 10px;min-height:98px;flex:1}
.arc-story-context{font-size:9px;color:#79c2e9;letter-spacing:.075em;font-weight:850;text-transform:uppercase;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.arc-story-data strong{font-size:11px;line-height:1.28;font-weight:760;color:#eef7ff;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.arc-story-bottom{display:flex;gap:4px;align-items:center;margin-top:auto;color:#9cb7cd;font-size:9px;font-weight:750;letter-spacing:.015em}
.arc-coverage-dot{height:5px;width:27px;border-radius:4px;background:linear-gradient(to right,#4babc8 var(--coverage),#304d62 var(--coverage))}
.arc-story-impact{margin-left:auto;font-size:8px;color:#819caf}
.arc-story-card.selected{border-color:#8ce6fa!important;box-shadow:0 0 0 1px #89e7f8,0 0 21px #22a1c43e}
.arc-story-date{font-size:9px;font-weight:700;line-height:1.35;color:#a3c4da;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}
.arc-story-model{font-size:8px;color:#e3c18a;font-weight:800;line-height:1.3}
.arc-story-card.is-incident{border-color:#76523a}
.arc-story-card.is-incident .arc-story-data{background:#211d21}
.arc-nav-footer{display:flex;flex-wrap:wrap;align-items:center;gap:8px 15px;padding:9px 18px;border-top:1px solid #324c66;background:#0a1723;color:#91afc6;font-size:9px}
.arc-nav-footer span{display:inline-flex;align-items:center;gap:5px}
.arc-nav-footer span:last-child{margin-left:auto;color:#718aa2}
.arc-nav-footer i{display:inline-block;width:7px;height:7px;border-radius:50%}
.arc-legend-main{background:#58c8e7}.arc-legend-event{background:#c498ea}.arc-legend-incident{background:#e2a572}
.arc-muted{padding:25px;color:#8ba4b9;font-size:12px}
.arc-editor{padding:12px;background:#142335;border:1px solid #36526a;border-radius:10px;margin:0 0 14px}
.arc-editor>p{font-size:12px;color:#a2b6c9}
.arc-edit-row{display:grid;grid-template-columns:minmax(125px,2fr) 110px 110px 70px;gap:8px;align-items:end;padding:7px 0;border-bottom:1px solid #263e55}
.arc-edit-row label{font-size:10px;color:#9bb3c9}.arc-edit-row input{width:100%;margin-top:5px;padding:6px}.arc-edit-row .outline-button{padding:7px}
.node-tags{display:flex;gap:3px;flex-wrap:wrap;max-height:25px;overflow:hidden;margin-top:2px}
.node-tags span{font-size:8px;color:#aecce7;background:#1e3b58;border:1px solid #35597d;padding:2px 4px;border-radius:4px;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.text-library{margin-top:23px;border-top:1px solid #2b4158;padding-top:17px}
.source-library-heading{display:flex;justify-content:space-between;font-size:11px;font-weight:800;color:#9ec8ed;letter-spacing:.05em;margin-bottom:12px}
.source-library-heading span{font-size:10px;font-weight:500;color:#8da9c1}
.source-library-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:8px}
.source-library-group{border:1px solid #2c4159;background:#111d2c;border-radius:7px;padding:10px;font-size:11px;min-width:0}
.source-library-group summary{cursor:pointer;font-weight:700;display:flex;justify-content:space-between}
.source-library-group summary strong{color:#81b9ee}
.source-library-group.unavailable{display:flex;justify-content:space-between;color:#7f97aa;border-style:dashed}
.source-library-group.unavailable small{color:#7d8ea0}
.source-library-group[open]{grid-column:1/-1}
.source-list{max-height:300px;overflow:auto;margin-top:10px;display:grid;gap:5px}
.source-list>div{display:flex;justify-content:space-between;gap:8px;padding:7px;background:#15283b;border-radius:4px}
.source-list>div span:first-child{flex:1;min-width:0}
.source-list>div span:last-child{white-space:nowrap;display:flex;align-items:center;gap:7px}
.source-list small{color:#9bbbcf}
/* NIKKE-inspired tactical search palette: editorial UI, no proprietary fonts. */
.quick-find-overlay[hidden]{display:none!important}
.quick-find-overlay{position:fixed;inset:0;z-index:1000;display:grid;place-items:start center;padding:9vh 20px 20px}
.quick-find-backdrop{position:absolute;inset:0;background:#020810d9;backdrop-filter:blur(9px)}
.quick-find-panel{position:relative;width:min(850px,100%);max-height:84vh;display:flex;flex-direction:column;background:linear-gradient(160deg,#102335,#081522);color:#eaf5ff;border:1px solid #6dc4dc;box-shadow:0 0 0 4px #0c1625,0 22px 70px #000b,0 0 35px #36aac522;clip-path:polygon(0 0,calc(100% - 15px) 0,100% 15px,100% 100%,15px 100%,0 calc(100% - 15px))}
.quick-find-panel:before{content:"";height:3px;background:linear-gradient(90deg,#65dcf7,#3ca6c0 30%,transparent);position:absolute;left:0;right:0;top:0;pointer-events:none}
.quick-find-top{display:flex;align-items:center;gap:14px;padding:19px 20px;border-bottom:1px solid #356079}
.quick-find-top>span{font-size:28px;color:#72e2f4}
.quick-find-top input{background:transparent;border:0;outline:0;box-shadow:none;flex:1;font:600 19px/1.4 "Bahnschrift","Segoe UI",sans-serif;min-width:0;color:#fff}
.quick-find-top input:focus{box-shadow:none;border:0}
.quick-find-top button{font:800 10px/1 "Bahnschrift","Segoe UI",sans-serif;border:1px solid #527b94;color:#9dbbd0;background:#183246;padding:8px}
.quick-find-types{display:flex;gap:6px;overflow-x:auto;padding:10px 15px;border-bottom:1px solid #2c4a61;background:#0b1a28}
.quick-find-chip{white-space:nowrap;background:transparent;color:#90b0c7;border:1px solid transparent;border-bottom-color:#466b82;padding:7px 10px;font:750 11px/1 "Bahnschrift","Segoe UI",sans-serif;letter-spacing:.03em}
.quick-find-chip.active,.quick-find-chip:hover{border-color:#63c6df;color:white;background:#214b65}
.quick-find-results{overflow-y:auto;flex:1;min-height:160px;padding:6px 12px 14px;scrollbar-color:#376f8c #0b1b2b}
.quick-find-summary{padding:6px 12px;margin:4px 0 10px;text-transform:uppercase;font-size:10px;font-weight:800;letter-spacing:.12em;color:#6ea7c6}
.quick-find-result{width:100%;display:flex;align-items:center;gap:14px;padding:13px 10px;text-align:left;color:#d7e9f7;background:transparent;border:1px solid transparent;border-bottom:1px solid #253f52}
.quick-find-result.active,.quick-find-result:hover,.quick-find-result:focus-visible{border-color:#6fd3ea;background:linear-gradient(90deg,#24506b,#152b3d);outline:0}
.quick-find-category{width:78px;flex-shrink:0;color:#7bd4ee;font-size:10px;letter-spacing:.06em;font-weight:900}
.quick-find-result-copy{display:flex;flex-direction:column;gap:4px;min-width:0;flex:1}
.quick-find-result-copy strong{font:750 14px/1.15 "Bahnschrift","Segoe UI",sans-serif;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}
.quick-find-result-copy small{color:#8fadc1;font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.quick-find-arrow{color:#628da9}
.quick-find-empty{padding:35px 10px;color:#91aec3;text-align:center}
.quick-find-dialogue{width:100%;padding:14px;background:#142f43;border:1px solid #3f7390;color:#c9eeff;text-align:left;font-size:12px;font-weight:750}
.quick-find-help{display:flex;justify-content:space-between;gap:10px;padding:10px 18px;background:#0a1722;border-top:1px solid #2b536c;font-size:10px;color:#7795a9}
.quick-find-launch{display:flex;gap:10px;align-items:center;white-space:nowrap}
.quick-find-launch span{font-weight:800;letter-spacing:.07em}
.quick-find-launch kbd{border:1px solid #436a85;border-radius:2px;padding:3px 5px;color:#87b8d0;font-size:9px}
@media(max-width:720px){.quick-find-overlay{padding:3vh 8px 8px}.quick-find-top{padding:12px 10px}.quick-find-top input{font-size:15px}.quick-find-category{width:58px}.quick-find-help{display:block}.quick-find-help span{display:block;padding:3px 0}.quick-find-launch kbd{display:none}}

/* Tactical presentation layer: original styling in the spirit of NIKKE UI.
   Uses locally installed fonts; no redistributed proprietary font binaries. */
:root{--atlas-tactical:#83d7ea;--atlas-rule:#3d647e;--atlas-edge:#5ba7c4}
body{font-family:"Segoe UI",Arial,sans-serif;letter-spacing:.005em}
.identity strong,.app-header h1,.section-heading h2,.detail-header h2,.arc-navigation-top strong,.arc-story-heading strong,.coverage-heading strong,.dialogue-index-panel strong{
 font-family:"Bahnschrift","Arial Narrow","Segoe UI Semibold","Segoe UI",sans-serif;
 font-weight:800;letter-spacing:.045em}
.section-heading h2,.detail-header h2{text-transform:uppercase;letter-spacing:.055em}
.app-header,.summary-row,.notice,.arc-navigator,.dialogue-search-box,.dialogue-index-panel,.dialogue-hit,.text-import-panel,.text-coverage,.registry-card,.entity-card,.gallery-card,.place-card,.details-panel,.arc-editor{
 border-radius:2px}
.arc-navigator,.dialogue-search-box,.gallery-editor,.place-action-panel,.dialogue-index-panel,.notice,.coverage-tile,.registry-card,.gallery-card,.place-card,.entity-card{
 border-color:#41647e}
.arc-navigator,.dialogue-search-box,.gallery-editor,.place-action-panel,.dialogue-index-panel,.notice{
 background-image:linear-gradient(130deg,#1a3e562b,transparent 43%),linear-gradient(180deg,#0e1d2c,#0b1522);
 box-shadow:inset 0 1px #a0d9f016}
.section-heading{position:relative;padding-bottom:12px;border-bottom:1px solid #4b7b96!important}
.section-heading:after{content:"";position:absolute;left:0;bottom:-2px;height:3px;width:62px;background:linear-gradient(90deg,#9eeafe,#3898b6)}
.app-header{border-bottom:1px solid #4983a2}
.summary-row{border-bottom:1px solid #3b6b85}
.stat{position:relative}
.stat:after{content:"";position:absolute;bottom:0;right:0;border-bottom:9px solid #469ac061;border-left:9px solid transparent}
.nav-link{border-left:2px solid transparent;text-transform:uppercase;font-family:"Bahnschrift","Segoe UI",sans-serif;font-weight:750;letter-spacing:.045em}
.nav-link.active{border-left:3px solid #83dcef}
.workspace-caption,.eyebrow,.field-label,.arc-kicker,.header-pretitle,.detail-topline{font-family:"Bahnschrift","Segoe UI",sans-serif;letter-spacing:.13em}
button,.outline-button,.primary-button{transition:filter .1s,border-color .1s,box-shadow .1s}
button:hover{filter:brightness(1.08)}
.arc-story-card,.gallery-card,.registry-card,.entity-card,.place-card{
 clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,9px 100%,0 calc(100% - 9px))}
.arc-story-card{min-height:226px;border-color:#456c85;background:#14283b}
.arc-story-data{gap:5px;min-height:112px}
.arc-story-card strong{font-family:"Bahnschrift","Segoe UI",sans-serif;font-size:12px;letter-spacing:.015em}
.arc-story-context{letter-spacing:.1em}
.arc-story-date{white-space:normal;font-family:"Bahnschrift","Segoe UI",sans-serif;min-height:25px;max-height:29px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.arc-story-art{height:110px}
.arc-story-scroller{scrollbar-color:#5b9cbd #0c2033}
.arc-story-bottom{padding-top:7px;border-top:1px solid #44698299}
.arc-map-scroller{border-top:1px solid #436b86;border-bottom:1px solid #436b86}
.arc-directory{border-bottom:1px solid #446782}
.arc-story-heading{border-top:0}
.unified-timeline-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;border-top:1px solid #47738f;padding:10px 5px 13px;font:800 9px/1.4 "Bahnschrift","Segoe UI",sans-serif;color:#8fb5ce;letter-spacing:.055em;text-transform:uppercase}
.unified-timeline-foot span{display:inline-flex;align-items:center;gap:8px}
.evidence-gradient{display:inline-block;width:110px;height:4px;background:linear-gradient(90deg,#668095,#2c75b7,#40bff1);box-shadow:0 0 8px #268bc333}
.methodology{margin-top:13px}
.registry-card:hover,.gallery-card:hover,.place-card:hover,.entity-card:hover{box-shadow:0 0 0 1px #75c5e8,0 10px 25px #0008}
@media(max-width:780px){.unified-timeline-foot span:last-child{display:none}.arc-story-card{min-height:210px}.arc-story-art{height:94px}}

/* Explorer-influenced atlas-wide styling: high-information density,
   luminous dividing rules, sharply cut navigation and restrained hues. */
:root{--bg:#070e17;--side:#0b121b;--panel:#0d1b29;--surface:#122538;--surface2:#172e45;--line:#304a60;--accent:#58bcd9;--blue:#8bc9f8;--cyan:#77dce4;--radius:9px}
.app-header{background:radial-gradient(ellipse at 80% 0,#1c496133,transparent 55%),linear-gradient(120deg,#0a1723,#102033)}
.sidebar{background:linear-gradient(180deg,#0b1622,#080e16);border-right-color:#34506a}
.identity .mark{border-color:#478fac;background:linear-gradient(130deg,#18435d,#0a1928)}
.nav-link{border-radius:5px}
.nav-link.active{background:linear-gradient(105deg,#194057,#102a3f);border-color:#4586a4;box-shadow:inset 3px 0 #72d9ec}
.summary-row{border-color:#39576c}
.stat strong{color:#dbf6ff}
.eyebrow,.header-pretitle,.workspace-caption{color:#87b9d2}
.section-heading{border-bottom-color:#36556b}
.registry-card,.entity-card,.dialogue-hit,.place-card,.gallery-card{border-radius:7px;border-color:#36536c;background:linear-gradient(160deg,#112537,#0a1725)}
.registry-card:hover,.entity-card:hover,.dialogue-hit:hover,.place-card:hover,.gallery-card:hover{border-color:#67b7d8}
.source-note,.notice,.text-coverage{border-color:#35566d}
button:focus-visible,[role="button"]:focus-visible{outline:2px solid #9eeaff;outline-offset:2px}
@media(max-width:780px){
  .arc-edit-row{grid-template-columns:1fr 1fr}.arc-edit-row input[name=name]{grid-column:span 2}
  .arc-nav-header{flex-direction:column;align-items:start;gap:6px}
  .arc-navigation-top{padding:13px 11px}
  .arc-summary-strip{padding:9px 11px}
  .arc-summary-strip .arc-editorial-note{margin-left:0;width:100%}
  .arc-story-heading{padding:12px 11px}
  .arc-story-scroller{padding:0 10px 12px}
  .arc-story-card{flex-basis:145px}
  .arc-story-art{height:89px}
  .arc-map-scroller{padding:7px 10px}
  .arc-nav-footer span:last-child{margin-left:0}
}