*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;min-height:100vh;font-family:Arial,Helvetica,sans-serif;background:radial-gradient(circle at top,#17324a 0%,#0c1722 42%,#05090d 100%);color:#f4f4f4}
.wrap{width:min(94%,1000px);margin:auto;padding:22px 18px 52px}
.umbrella{text-align:center;color:#c6d9e6;font-size:10.5px;font-weight:800;letter-spacing:2.2px;text-transform:uppercase;margin-bottom:7px}
.umbrella strong{color:#ffd166}
.preview{text-align:center;color:#9ecae1;font-weight:700;letter-spacing:2px;font-size:11px;margin-bottom:9px}
h1{margin:0;text-align:center;color:#ffd166;font-size:clamp(30px,5vw,54px);letter-spacing:1.5px;line-height:1.08}
.intro{max-width:790px;margin:10px auto 7px;text-align:center;line-height:1.42;color:#d6e3ec;font-size:clamp(15px,2.2vw,19px)}
.rule{margin:0 auto 24px;max-width:800px;text-align:center;color:#9ecae1;font-size:13px;line-height:1.4}
.room-nav{display:grid;grid-template-columns:repeat(6,1fr);gap:7px;max-width:760px;margin:0 auto 26px}
.room-nav a{display:flex;align-items:center;justify-content:center;min-height:38px;padding:8px 9px;border:1px solid rgba(255,255,255,.18);border-radius:11px;background:rgba(255,255,255,.05);color:#dceaf2;text-decoration:none;font-size:11px;font-weight:800;letter-spacing:.75px}
.section-title{margin:26px 0 10px;padding-bottom:7px;border-bottom:1px solid rgba(255,255,255,.18);color:#9ecae1;font-size:17px;font-weight:800;letter-spacing:.9px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.grid>.card:only-child{grid-column:1/-1}
.card{display:flex;flex-direction:column;justify-content:center;min-height:82px;padding:14px 16px;border:1px solid rgba(255,255,255,.17);border-radius:15px;background:rgba(255,255,255,.072);color:white;text-decoration:none;box-shadow:0 6px 18px rgba(0,0,0,.2);text-align:left;font:inherit;width:100%}
button.card{cursor:pointer}
.name{font-size:clamp(18px,2.3vw,24px);font-weight:800;line-height:1.12}
.note{margin-top:5px;color:#b1c4d1;font-size:12.5px;line-height:1.35}
.source{margin-top:6px;color:#e7c66f;font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.75px;opacity:.92}
.feature{margin:3px 0 4px;padding:16px;border:2px solid #ffd166;border-radius:18px;background:rgba(255,209,102,.085)}
.feature-head{text-align:center;margin-bottom:12px}
.feature-head strong{display:block;color:#ffd166;font-size:clamp(23px,3.8vw,32px)}
.feature-head span{display:block;margin-top:4px;color:#d6e3ec;font-size:13px;line-height:1.35}
.issue-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.issue{min-height:88px;padding:10px 8px;border-radius:12px;background:rgba(255,255,255,.085);border:1px solid rgba(255,255,255,.16);color:#fff;text-decoration:none;text-align:center;display:flex;flex-direction:column;justify-content:center}
.issue .num{color:#ffd166;font-size:10px;font-weight:800;margin-bottom:4px}
.issue .date{font-size:13px;font-weight:800;line-height:1.16}
.issue .read{margin-top:5px;font-size:10px;color:#9ecae1}
.date-short{display:none}
.research-box{padding:15px;border-radius:15px;background:rgba(158,202,225,.07);border:1px solid rgba(158,202,225,.2)}
.research-copy{margin:0 0 12px;color:#cbdce7;font-size:13px;line-height:1.42}
.collapsible{margin-top:24px}
.collapsible summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;padding:0 0 8px;border-bottom:1px solid rgba(255,255,255,.18);color:#9ecae1;font-size:17px;font-weight:800;letter-spacing:.9px}
.collapsible summary::-webkit-details-marker{display:none}
.collapsible summary::after{content:"−";font-size:22px;color:#ffd166;line-height:1}
.collapsible:not([open]) summary::after{content:"+"}
.collapsible .inside{margin-top:10px}
.card-shell{justify-content:flex-start}
.actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin-top:11px}
.action{display:flex;align-items:center;justify-content:center;min-height:36px;padding:8px 9px;border:1px solid rgba(255,255,255,.19);border-radius:10px;background:rgba(255,255,255,.055);color:#fff;text-decoration:none;text-align:center;font-size:10.5px;font-weight:800;letter-spacing:.35px;line-height:1.2}
.utility{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:28px}
.utility a{display:block;padding:17px;text-align:center;border:1px solid rgba(255,255,255,.2);border-radius:16px;background:rgba(255,255,255,.055);color:#fff;text-decoration:none;font-weight:800;font-size:17px}
.utility small{display:block;margin-top:5px;color:#a9c3d4;font-size:11.5px;font-weight:400;line-height:1.35}
.utility .wide{grid-column:1/-1}
.footer-row{display:flex;align-items:flex-end;justify-content:space-between;gap:22px;margin-top:26px}
.foot{text-align:left;margin-top:0;color:#7f94a4;font-size:12px;line-height:1.35}
.site-counter{flex:0 0 auto;text-align:right;font:800 9px Arial,Helvetica,sans-serif;letter-spacing:.12em;text-transform:uppercase;color:#7f94a4}
.site-counter .counter-label{margin-bottom:5px}
.site-counter img{display:block;margin-left:auto;border:1px solid #303944;box-shadow:0 4px 12px rgba(0,0,0,.28);max-width:100%}
.site-counter a,.site-counter a img{cursor:default}
.rights-notice{margin-top:24px;padding:15px 17px;border:1px solid rgba(255,255,255,.14);border-radius:14px;background:rgba(255,255,255,.035);color:#9fb5c4;font-size:11.5px;line-height:1.55}
.rights-notice strong{color:#d9e6ee}

/* Reading Room issue-shelf overlay */
.modal{display:none;position:fixed;inset:0;z-index:999;background:rgba(2,6,10,.88);padding:18px;align-items:center;justify-content:center}
.modal.open{display:flex}
.modal-panel{width:min(96vw,980px);max-height:91vh;overflow:auto;background:#0b1721;border:1px solid rgba(255,255,255,.2);border-radius:18px;box-shadow:0 20px 60px rgba(0,0,0,.55)}
.modal-head{position:sticky;top:0;z-index:2;padding:15px 16px 12px;background:rgba(11,23,33,.97);border-bottom:1px solid rgba(255,255,255,.14)}
.modal-topline{display:flex;gap:12px;align-items:flex-start;justify-content:space-between}
.modal-title{margin:0;color:#ffd166;font-size:clamp(21px,3.6vw,31px);line-height:1.1}
.modal-close{flex:0 0 auto;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:#fff;border-radius:10px;padding:8px 11px;font-weight:800;cursor:pointer}
.modal-sub{margin-top:6px;color:#b9ccd9;font-size:12.5px;line-height:1.38}
.modal-actions{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px}
.modal-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:7px 10px;border:1px solid rgba(255,255,255,.18);border-radius:9px;background:rgba(255,255,255,.05);color:#fff;text-decoration:none;font-size:10.5px;font-weight:800}
.modal-body{padding:14px 16px 18px}
.load-note{padding:14px;border:1px dashed rgba(158,202,225,.35);border-radius:12px;color:#cbdce7;font-size:13px;line-height:1.4}
.year-head{margin:15px 0 7px;color:#9ecae1;font-size:13px;font-weight:800;letter-spacing:.7px}
.shelf-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.shelf-item{display:flex;flex-direction:column;justify-content:center;min-height:72px;padding:9px 10px;border:1px solid rgba(255,255,255,.15);border-radius:11px;background:rgba(255,255,255,.055);color:#fff;text-decoration:none}
.shelf-item strong{font-size:12.5px;line-height:1.25}
.shelf-item span{margin-top:4px;color:#9ecae1;font-size:9.5px;font-weight:700;line-height:1.25}
.cover-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.cover-item{display:flex;flex-direction:column;overflow:hidden;border:1px solid rgba(255,255,255,.15);border-radius:12px;background:rgba(255,255,255,.055);color:#fff;text-decoration:none;min-width:0}
.cover-wrap{aspect-ratio:3/4;background:rgba(0,0,0,.22);display:flex;align-items:center;justify-content:center;overflow:hidden}
.cover-wrap img{width:100%;height:100%;object-fit:cover;display:block}
.cover-copy{padding:9px 10px 10px;display:flex;flex-direction:column;min-height:94px}
.cover-copy strong{font-size:12.5px;line-height:1.2}
.cover-copy .cover-desc{margin-top:5px;color:#b8cbd8;font-size:9.5px;line-height:1.3;font-weight:500}
.cover-copy .cover-read{margin-top:auto;padding-top:7px;color:#9ecae1;font-size:9.5px;font-weight:800}
.static-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.static-item{padding:10px 12px 10px 14px;border:0;border-left:3px solid rgba(158,202,225,.48);border-radius:4px;background:rgba(255,255,255,.025)}
.static-item .record-label{display:block;margin-bottom:5px;color:#7fa9c1;font-size:8.5px;font-weight:800;letter-spacing:.7px;text-transform:uppercase}
.static-item strong{display:block;font-size:13px;line-height:1.25}
.static-item .status{display:inline-block;margin-top:6px;color:#e7c66f;font-size:9.5px;font-weight:800;letter-spacing:.5px}
.static-item .meta{display:block;margin-top:4px;color:#a9c3d4;font-size:10.5px;line-height:1.25}

@media (hover:hover) and (pointer:fine){
  .card:hover{border-color:#ffd166;background:rgba(255,209,102,.12)}
  .issue:hover{border-color:#ffd166;background:rgba(255,209,102,.16)}
  .action:hover{border-color:#ffd166;background:rgba(255,209,102,.10)}
  .utility a:hover{border-color:#ffd166;background:rgba(255,209,102,.09)}
  .shelf-item:hover{border-color:#ffd166;background:rgba(255,209,102,.10)}
  .cover-item:hover{border-color:#ffd166;background:rgba(255,209,102,.10)}
  .modal-actions a:hover,.modal-close:hover{border-color:#ffd166;background:rgba(255,209,102,.10)}
  .room-nav a:hover{border-color:#ffd166;background:rgba(255,209,102,.10);color:#ffd166}
}
@media(max-width:760px){.issue-grid{grid-template-columns:repeat(3,1fr)}.shelf-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:650px){
  .wrap{width:min(94%,1000px);padding:17px 14px 42px}
  .umbrella{font-size:9px;letter-spacing:1.6px;margin-bottom:6px}
  .preview{font-size:10px;margin-bottom:7px}
  h1{font-size:clamp(27px,9.5vw,42px);letter-spacing:1px}
  .intro{font-size:15px;line-height:1.36;margin-top:9px}
  .rule{font-size:12px;line-height:1.35;margin-bottom:18px}
  .room-nav{grid-template-columns:repeat(3,1fr);gap:5px;margin-bottom:20px}
  .room-nav a{min-height:34px;padding:7px 4px;font-size:9px;letter-spacing:.45px}
  .section-title{margin-top:22px;font-size:16px}
  .grid,.utility{grid-template-columns:1fr;gap:9px}
  .card{min-height:70px;padding:12px 14px;border-radius:14px}
  .name{font-size:20px}
  .note{font-size:12.5px;line-height:1.32}
  .source{font-size:9px;margin-top:5px}
  .feature{padding:12px;border-radius:16px}
  .feature-head{margin-bottom:9px}
  .feature-head strong{font-size:25px}
  .feature-head span{font-size:12px}
  .issue-grid{grid-template-columns:repeat(3,1fr);gap:6px}
  .issue{min-height:72px;padding:8px 5px;border-radius:10px}
  .issue .num{font-size:9px}
  .issue .date{font-size:12px}
  .issue .read{font-size:9px;margin-top:4px}
  .date-full{display:none}
  .date-short{display:inline}
  .research-box{padding:12px}
  .research-copy{font-size:12.5px;margin-bottom:10px}
  .collapsible{margin-top:21px}
  .collapsible summary{font-size:16px;padding-bottom:7px}
  .actions{grid-template-columns:1fr;gap:6px}
  .action{min-height:34px;font-size:10px}
  .utility{margin-top:22px}
  .utility a{padding:15px;font-size:16px}
  .foot{font-size:11px;margin-top:0}
  .rights-notice{margin-top:20px;padding:13px 14px;font-size:10.5px}
  .modal{padding:8px}
  .modal-panel{max-height:95vh;border-radius:15px}
  .modal-head{padding:12px}
  .modal-body{padding:11px 12px 14px}
  .modal-title{font-size:22px}
  .modal-sub{font-size:11.5px}
  .shelf-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
  .cover-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
  .cover-copy{min-height:88px;padding:8px}
  .shelf-item{min-height:65px;padding:8px}
  .shelf-item strong{font-size:11.5px}
  .static-list{grid-template-columns:1fr}
}

@media(max-width:620px){
  .footer-row{align-items:flex-start;flex-direction:column}
  .site-counter{text-align:left}
  .site-counter img{margin-left:0}
}

@media(max-width:430px){
  .room-nav{grid-template-columns:repeat(3,1fr)}
}


/* Rebalance the Arcade History research section: one wide deep-dive desk, then two supporting desks. */
.research-history-grid>.research-historians-card{grid-column:1/-1}
@media(max-width:650px){
  .research-history-grid>.research-historians-card{grid-column:auto}
}


/* Uniform Reading Room action buttons.
   Desktop buttons stay compact and equal-sized instead of stretching across cards. */
.card-shell .actions{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin-top:11px;
  justify-content:flex-start;
}
.card-shell .action{
  flex:0 0 180px;
  width:180px;
  min-height:38px;
  padding:6px 8px;
  box-sizing:border-box;
}
@media(max-width:650px){
  .card-shell .actions{margin-top:9px}
  .card-shell .action{flex-basis:100%;width:100%}
}


/* Symmetrical Arcade History research layout. */
.research-history-grid{
  align-items:stretch;
}
.research-history-grid>.card{
  height:100%;
}

/* 15 historian/deep-dive links = a perfect 3 x 5 matrix. */
.research-historians-card{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:6px;
  align-content:start;
}
.research-historians-card>.name,
.research-historians-card>.note,
.research-historians-card>.source{
  grid-column:1/-1;
}
.research-historians-card>.site-actions,
.research-historians-card>.article-actions{
  display:contents;
}
.research-historians-card .site-home,
.research-historians-card .article-link{
  width:100%;
  min-width:0;
  height:42px;
  min-height:42px;
  margin:0;
  flex:none;
}

/* Developer desk: four links in a balanced 2 x 2 block. */
.research-developer-card .article-actions{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:6px;
  margin-top:auto;
  padding-top:11px;
}
.research-developer-card .article-link{
  width:100%;
  min-width:0;
  height:42px;
  min-height:42px;
  margin:0;
  flex:none;
}

/* System 16: same visual button size, centered in its matching-height card. */
.research-system-card .actions{
  margin-top:auto;
  padding-top:11px;
  justify-content:center;
}
.research-system-card .action{
  width:180px;
  flex:0 0 180px;
  height:42px;
  min-height:42px;
}

@media(max-width:650px){
  .research-historians-card{
    grid-template-columns:1fr;
  }
  .research-developer-card .article-actions{
    grid-template-columns:1fr;
  }
  .research-historians-card .site-home,
  .research-historians-card .article-link,
  .research-developer-card .article-link,
  .research-system-card .action{
    width:100%;
    flex-basis:100%;
    height:auto;
    min-height:36px;
  }
}