/* Atlas of Ages — public beta stylesheet.
   Layout: header (wordmark, decade lens, tools) · region rail · timeline canvas beside the
   "world in this decade" ledger · overview stream and notes along the foot. */

:root{
  --paper:#f1f0ec; --paper-2:#e8e7e2; --paper-3:#f9f9f6; --ink:#2a2118; --ink-2:#625b51;
  --rule:#d0cdc4; --accent:#7b2d1f; --gilt:#9c6f1a; --stone:#dedcd5; --hatch:#c6c2b8;
  --shadow:rgba(42,33,24,.16); --on-accent:#fbf5e6; --warn:#8a5a12;
  --f-display:'IM Fell English SC','Iowan Old Style',Georgia,serif;
  --f-serif:'Alegreya','Noto Serif SC Subset','Iowan Old Style',Georgia,'Songti SC','SimSun',serif;
  --f-ui:'Alegreya Sans','Noto Serif SC Subset','Gill Sans','Segoe UI',system-ui,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#1c1711; --paper-2:#262017; --paper-3:#2c251b; --ink:#ede1c7; --ink-2:#ad9b7f;
  --rule:#4b3f2f; --accent:#de8d70; --gilt:#e2b45a; --stone:#373027; --hatch:#4a4033;
  --shadow:rgba(0,0,0,.5); --on-accent:#1c1711; --warn:#e2b45a; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#1c1711; --paper-2:#262017; --paper-3:#2c251b; --ink:#ede1c7; --ink-2:#ad9b7f;
  --rule:#4b3f2f; --accent:#de8d70; --gilt:#e2b45a; --stone:#373027; --hatch:#4a4033;
  --shadow:rgba(0,0,0,.5); --on-accent:#1c1711; --warn:#e2b45a; color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--paper);color:var(--ink);font-family:var(--f-ui);font-size:15px;line-height:1.4;overflow:hidden;
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);-webkit-text-size-adjust:100%}
button,input{font:inherit;color:inherit}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--gilt);outline-offset:2px}
a{color:inherit;text-decoration-color:var(--rule);text-underline-offset:3px}
a:hover{text-decoration-color:var(--ink-2)}
svg.i{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.app{height:100%;display:grid;grid-template-rows:auto auto minmax(0,1fr) auto auto;gap:10px;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:12px}

/* header */
.top{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.brand{display:flex;flex-direction:column;min-width:0}
.brand h1{font-family:var(--f-display);font-weight:400;font-size:28px;line-height:1;margin:0;letter-spacing:.02em;display:flex;align-items:center;gap:10px}
.beta{font-family:var(--f-ui);font-size:10.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;border:1px solid var(--accent);color:var(--accent);border-radius:999px;padding:2px 7px 1px;line-height:1.2}
.brand p{margin:4px 0 0;color:var(--ink-2);font-size:13px}
.lens{display:flex;align-items:center;gap:8px;margin-left:auto;margin-right:auto}
.lens .yr{font-family:var(--f-serif);font-size:30px;line-height:1;min-width:6.2em;text-align:center;font-variant-numeric:lining-nums tabular-nums}
.lens .yr small{display:block;font-family:var(--f-ui);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin-bottom:3px}
.ibtn{border:1px solid var(--rule);background:var(--paper-3);border-radius:999px;height:34px;min-width:34px;padding:0 10px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;font-size:13px;white-space:nowrap}
.ibtn:hover{border-color:var(--ink-2)}
.ibtn.play{background:var(--accent);color:var(--on-accent);border-color:var(--accent);min-width:42px}
.ibtn[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.tools{display:flex;align-items:center;gap:8px;position:relative}
.search{position:relative}
.search input{width:220px;height:34px;border-radius:999px;border:1px solid var(--rule);background:var(--paper-3);padding:0 14px}
.search input::placeholder{color:var(--ink-2)}
.results{position:absolute;top:40px;right:0;width:320px;max-width:86vw;background:var(--paper-3);border:1px solid var(--rule);border-radius:8px;box-shadow:0 10px 30px var(--shadow);z-index:30;padding:4px;list-style:none;margin:0}
.results li button{width:100%;text-align:left;border:0;background:none;padding:7px 9px;border-radius:5px;cursor:pointer;display:grid;grid-template-columns:10px 1fr;gap:3px 9px;align-items:center}
.results li button:hover,.results li button.on{background:var(--paper-2)}
.results .sw{width:10px;height:10px;border-radius:2px}
.results .meta{grid-column:2;font-size:12px;color:var(--ink-2)}
.results .empty{padding:10px;color:var(--ink-2);font-size:13px}

/* region rail */
.rail{display:flex;gap:6px;overflow-x:auto;scrollbar-width:thin;padding-bottom:2px}
.chip{flex:0 0 auto;border:1px solid var(--rule);background:transparent;border-radius:6px;padding:4px 7px 3px;cursor:pointer;display:flex;flex-direction:column;align-items:flex-start;gap:2px;min-width:76px}
.chip .nm{font-size:12px;font-weight:500;white-space:nowrap}
.chip canvas{width:64px;height:14px;display:block}
.chip[aria-pressed="true"]{background:var(--paper-3);border-color:var(--ink-2);box-shadow:inset 0 -2px 0 var(--accent)}
.chip[aria-pressed="false"] .nm{color:var(--ink-2)}
.rail .railbtns{flex:0 0 auto;display:flex;flex-direction:column;justify-content:center;gap:4px;margin-left:2px}
.rail .mini{border:1px solid var(--rule);background:var(--paper-3);color:var(--ink-2);font:500 11.5px/1 var(--f-ui);border-radius:5px;padding:3px 9px 4px;cursor:pointer;white-space:nowrap;text-align:center}
.rail .mini:hover{border-color:var(--ink-2);color:var(--ink)}

/* main */
.main{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:12px;min-height:0}
.stage{position:relative;border:1px solid var(--rule);border-radius:6px;overflow:hidden;background:var(--paper-3);min-height:0;touch-action:none}
.stage canvas{position:absolute;inset:0;width:100%;height:100%;cursor:grab}
.stage canvas.grabbing{cursor:grabbing}
.stage canvas.ew{cursor:ew-resize}
.stage canvas.pt{cursor:pointer}
.tip{position:absolute;pointer-events:none;background:var(--ink);color:var(--paper);padding:6px 9px;border-radius:5px;font-size:12.5px;line-height:1.3;max-width:280px;z-index:5;box-shadow:0 6px 18px var(--shadow)}
.tip b{font-weight:700;display:block;font-family:var(--f-serif);font-size:14px}
.tip .q{opacity:.8}
.zoom{position:absolute;right:10px;bottom:10px;display:flex;flex-direction:column;gap:4px;z-index:4}
.zoom .ibtn{width:32px;height:32px;padding:0;font-size:17px;box-shadow:0 2px 8px var(--shadow)}
.status{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background:var(--paper-3);z-index:6;text-align:center;padding:24px;font-family:var(--f-serif);font-size:18px;color:var(--ink-2)}
.status .bar{width:220px;height:4px;border-radius:2px;background:var(--stone);overflow:hidden}
.status .bar i{display:block;height:100%;width:0;background:var(--gilt);transition:width .2s}

.ledger{border:1px solid var(--rule);border-radius:6px;background:var(--paper-2);overflow:auto;min-height:0;display:flex;flex-direction:column;overscroll-behavior:contain}
.ledger-head{padding:14px 16px 10px;border-bottom:1px solid var(--rule);position:sticky;top:0;background:var(--paper-2);z-index:2}
.side{display:grid;grid-template-rows:auto minmax(0,1fr);gap:10px;min-height:0}
.adslot{height:100px;overflow:hidden}   /* reserved ad space above the decade panel; blank until an ad is placed */
.ledger-head .eyebrow{font-family:var(--f-ui);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin-right:8px;white-space:nowrap}
.ledger-head h2{font-family:var(--f-serif);font-weight:400;font-size:24px;margin:0 0 3px;line-height:1.15}
.ledger-head p{margin:0;font-size:13px;color:var(--ink-2)}
.ledger-body{padding:6px 8px 14px}
.grp{margin-top:10px}
.grp h3{font-family:var(--f-display);font-weight:400;font-size:15px;margin:0 8px 4px;display:flex;justify-content:space-between;align-items:baseline;gap:8px;border-bottom:1px dotted var(--rule);padding-bottom:3px}
.grp h3 span{font-family:var(--f-ui);font-size:11.5px;color:var(--ink-2);text-align:right}
.row{width:100%;border:0;background:none;text-align:left;cursor:pointer;display:grid;grid-template-columns:10px 1fr auto;gap:8px;align-items:center;padding:4px 8px;border-radius:4px;font-size:13.5px}
.row:hover{background:var(--paper-3)}
.row .sw{width:10px;height:10px;border-radius:2px}
.row .yrs{font-size:11.5px;color:var(--ink-2);font-variant-numeric:tabular-nums;white-space:nowrap}
.row.cul{font-family:var(--f-serif);font-style:italic;color:var(--ink-2)}
.row.cul .sw,.sw.cul{background:repeating-linear-gradient(135deg,var(--hatch) 0 2px,var(--stone) 2px 4px)}
.row.sel{background:var(--paper-3);box-shadow:inset 2px 0 0 var(--accent)}
.row .scope{border-bottom:1px dotted var(--ink-2)}
.empty{padding:14px 10px;color:var(--ink-2);font-size:13.5px}

.card{margin:10px 8px 4px;background:var(--paper-3);border:1px solid var(--rule);border-radius:6px;padding:14px 14px 12px;position:relative}
.card .x{position:absolute;top:6px;right:6px;border:0;background:none;cursor:pointer;color:var(--ink-2);padding:6px;border-radius:4px;display:flex}
.card .x:hover{background:var(--paper-2)}
.card h4{font-family:var(--f-serif);font-weight:400;font-size:22px;line-height:1.15;margin:0 26px 6px 0;text-wrap:balance}
.card .span{font-size:14px;font-variant-numeric:tabular-nums}
.card .span em{color:var(--ink-2);font-style:normal}
.qual{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;border-radius:3px;padding:1px 5px;margin-right:6px;vertical-align:1px;background:var(--paper-2);color:var(--ink-2);border:1px solid var(--rule)}
.qual.win{color:var(--warn);border-color:currentColor;background:transparent}
.card .clip{font-size:12.5px;color:var(--ink-2);margin-top:3px}
.pills{display:flex;flex-wrap:wrap;gap:6px;margin:9px 0}
.pill{font-size:11.5px;border:1px solid var(--rule);border-radius:999px;padding:2px 8px;display:inline-flex;align-items:center;gap:5px;background:none}
button.pill{cursor:pointer}
.pill i{width:8px;height:8px;border-radius:2px;display:inline-block}
.pill.warn{border-color:var(--warn);color:var(--warn)}
.card .sum{font-family:var(--f-serif);font-size:15px;line-height:1.45;margin:6px 0 2px}
.card .meta{font-size:13px;color:var(--ink-2);margin:4px 0}
.card .meta b{color:var(--ink);font-weight:500}
.note{font-size:12.5px;line-height:1.45;color:var(--ink-2);border-left:2px solid var(--warn);padding:4px 0 4px 9px;margin:9px 0}
.note.plain{border-left-color:var(--rule)}
.life{position:relative;height:22px;margin:10px 0 2px}
.life .track{position:absolute;left:0;right:0;top:8px;height:5px;border-radius:3px;background:var(--stone)}
.life .seg{position:absolute;top:5px;height:11px;border-radius:2px;min-width:3px}
.life .tk{position:absolute;top:17px;font-size:9.5px;color:var(--ink-2);transform:translateX(-50%)}
.card .lab{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);margin:12px 0 4px}
.chain{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:center;font-size:13px}
.chain button{border:0;background:none;padding:0;cursor:pointer;text-decoration:underline;text-decoration-color:var(--rule);text-underline-offset:3px;text-align:left}
.chain span{color:var(--ink-2)}
.meanwhile{display:grid;gap:2px}
.meanwhile .row{padding:3px 4px}
.acts{display:flex;gap:6px;margin-top:12px;flex-wrap:wrap}
details.more{margin-top:10px;border-top:1px dotted var(--rule);padding-top:8px}
details.more summary{cursor:pointer;font-size:12.5px;color:var(--ink-2);list-style:none;display:flex;align-items:center;gap:6px}
details.more summary::-webkit-details-marker{display:none}
details.more summary::before{content:'';width:0;height:0;border-left:5px solid currentColor;border-top:4px solid transparent;border-bottom:4px solid transparent;transition:transform .15s}
details.more[open] summary::before{transform:rotate(90deg)}
details.more .body{font-size:12.5px;line-height:1.45;color:var(--ink-2);padding:6px 0 2px}
.srcs{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.srcs li{font-size:12.5px;line-height:1.35}
.srcs .pub{display:block;color:var(--ink-2);font-size:11.5px}

/* overview */
.foot{display:grid;gap:4px}
.over{position:relative;height:70px;border:1px solid var(--rule);border-radius:6px;overflow:hidden;background:var(--paper-3);touch-action:none}
.over canvas{position:absolute;inset:0;width:100%;height:100%;cursor:pointer}
.hint{font-size:12px;color:var(--ink-2);display:flex;justify-content:space-between;gap:6px 14px;flex-wrap:wrap}
.hint button{border:0;background:none;padding:0;color:inherit;text-decoration:underline;text-decoration-color:var(--rule);text-underline-offset:3px;cursor:pointer;font-size:12px}

/* popovers & dialog */
.key{position:absolute;top:42px;right:0;width:540px;max-width:calc(100vw - 32px);max-height:72vh;overflow:auto;background:var(--paper-3);border:1px solid var(--rule);border-radius:8px;box-shadow:0 14px 40px var(--shadow);z-index:40;padding:14px 16px}
.key h5{font-family:var(--f-display);font-weight:400;font-size:17px;margin:0 0 2px}
.key p{margin:0 0 10px;font-size:12.5px;color:var(--ink-2)}
.keygrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:4px 12px}
.keygrid .kg{grid-column:1/-1;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);margin-top:8px}
.kf{display:grid;grid-template-columns:12px 1fr auto;gap:7px;align-items:center;border:0;background:none;text-align:left;padding:4px 6px;border-radius:4px;cursor:pointer;font-size:13px}
.kf:hover{background:var(--paper-2)}
.kf[aria-pressed="true"]{background:var(--paper-2);box-shadow:inset 0 0 0 1px var(--ink-2)}
.kf i{width:12px;height:12px;border-radius:2px}
.kf span{font-size:11px;color:var(--ink-2)}
.pilot{position:absolute;top:42px;right:0;width:360px;max-width:calc(100vw - 32px);background:var(--paper-3);border:1px solid var(--rule);border-radius:8px;box-shadow:0 14px 40px var(--shadow);z-index:41;padding:14px 16px}
.pilot h5{font-family:var(--f-display);font-weight:400;font-size:17px;margin:0 0 2px}
.pilot p{margin:0 0 10px;font-size:12.5px;color:var(--ink-2)}
.pilot fieldset{border:0;margin:0 0 8px;padding:0;display:grid;gap:6px}
.pilot legend{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);margin-bottom:4px;padding:0}
.pilot label{display:flex;align-items:baseline;gap:8px;font-size:13.5px;cursor:pointer;flex-wrap:wrap}
.pilot label span{font-size:11.5px;color:var(--ink-2)}
.pilot label.cb{margin:4px 0 10px}
.pilot input:disabled+*{opacity:.5}
.pilot .fine{font-size:11.5px;margin:0 0 6px}
#pilotBtn.on{border-color:var(--accent);color:var(--accent)}
.dl{display:grid;grid-template-columns:58px 1fr;gap:8px 12px;align-items:center;font-size:12.5px;margin:6px 0 14px}
.dl canvas{width:58px;height:16px;display:block}
.dl b{font-weight:500}
.dl span{color:var(--ink-2)}

dialog.about{border:1px solid var(--rule);border-radius:10px;background:var(--paper-3);color:var(--ink);max-width:min(680px,calc(100vw - 32px));max-height:calc(100vh - 48px);padding:0;box-shadow:0 20px 60px var(--shadow)}
dialog.about::backdrop{background:rgba(20,15,10,.45)}
.about .in{padding:22px 24px 18px;overflow:auto;max-height:calc(100vh - 50px)}
.about h2{font-family:var(--f-display);font-weight:400;font-size:28px;margin:0 30px 2px 0}
.about .tag{font-family:var(--f-serif);font-style:italic;font-size:17px;color:var(--ink-2);margin:0 0 14px}
.about h3{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin:18px 0 6px;font-weight:700}
.about p,.about li{font-size:14px;line-height:1.5}
.about ul{padding-left:18px;margin:6px 0}
.about .x{position:absolute;top:10px;right:10px;border:0;background:none;cursor:pointer;color:var(--ink-2);padding:6px;border-radius:4px;display:flex}
.about .fine{font-size:12.5px;color:var(--ink-2)}
.about a{color:var(--accent)}
.pre{font-size:.62em;letter-spacing:.04em;color:var(--accent);align-self:center}
.about h2 .pre{font-size:.6em;margin-right:2px}
.about .lede{font-family:var(--f-serif);font-size:15.5px;line-height:1.55;margin:0 0 14px}
.about .cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:4px 0 2px}
.about .cards3 .c{border:1px solid var(--rule);border-top:3px solid var(--c);border-radius:6px;background:var(--paper);padding:8px 10px 9px;display:flex;flex-direction:column;gap:3px}
.about .cards3 b{font-size:13.5px;color:var(--c)}
.about .cards3 span{font-size:12.5px;line-height:1.4;color:var(--ink-2)}
.about .srcs{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.about .srcs .s{border-left:3px solid var(--c);background:var(--paper);border-radius:0 6px 6px 0;padding:7px 10px 8px;display:flex;flex-direction:column;gap:2px}
.about .srcs b{font-size:13px}
.about .srcs span{font-size:12.5px;line-height:1.45;color:var(--ink-2)}
.about .maker{margin:18px 0 4px;padding:10px 14px;border-radius:8px;background:color-mix(in srgb,var(--gilt) 12%,var(--paper-3));border:1px solid color-mix(in srgb,var(--gilt) 40%,var(--rule))}
.about .maker p{margin:3px 0;font-size:13.5px}
.about .keyhint{margin:10px 0 0}
@media (max-width:560px){.about .cards3,.about .srcs{grid-template-columns:1fr}}
.credit{margin:-4px 0 0;padding-top:5px;border-top:1px solid var(--rule);font-size:10.5px;color:var(--ink-2);text-align:center;line-height:1.35}
.credit b{font-weight:700}

@media (max-width:860px){
  body{overflow:auto}
  .app{height:auto;min-height:100%}
  .lens{order:3;margin:0;width:100%;justify-content:center}
  .tools{margin-left:auto}
  .search input{width:150px}
  .main{grid-template-columns:1fr}
  .stage{height:58vh;min-height:340px}
  .ledger{max-height:none;overflow:visible}
  .adslot:empty{display:none}
  .side{display:block}
  .ledger-head{position:static}
  .brand h1{font-size:24px}
  .credit{position:sticky;bottom:0;background:var(--paper);padding-bottom:6px;z-index:5;font-size:10px}
  .key,.pilot{position:fixed;top:auto;bottom:12px;left:12px;right:12px;width:auto}
}
@media (max-width:520px){
  .tools{width:100%;margin-left:0}
  .search{flex:1}
  .search input{width:100%}
  .hint .gest{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
@media print{.rail,.tools,.zoom,.foot,.lens{display:none}}
.tscale-cap{margin:10px 0 0;padding-top:8px;border-top:1px solid var(--rule);font-size:12px;color:var(--ink-2)}
.tscale{display:flex;align-items:center;gap:14px;margin:6px 0 2px}
.tscale span{display:flex;flex-direction:column;align-items:center;gap:3px}
.tscale i{display:block;width:30px;background:var(--ink-2);border-radius:1px}
.tscale b{font-weight:500;font-size:10.5px;color:var(--ink-2);white-space:nowrap}

/* Multilingual Foundation v0.1: limited Chinese pilot. System CJK fonts only until the production subset is curated. */
.langselect{height:34px;max-width:138px;border-radius:999px;border:1px solid var(--rule);background:var(--paper-3);padding:0 9px;font:500 12px var(--f-ui);cursor:pointer}
html[lang="zh-Hans"]{--f-display:'Songti SC','Noto Serif CJK SC','Microsoft YaHei',serif;--f-serif:'Songti SC','Noto Serif CJK SC','SimSun',serif;--f-ui:'PingFang SC','Microsoft YaHei','Noto Sans CJK SC',system-ui,sans-serif}
html[lang="zh-Hans"] .brand h1{font-family:'IM Fell English SC',Georgia,serif}
html[lang="zh-Hans"] .ledger-head .eyebrow{text-transform:none;letter-spacing:.04em}
html[lang="zh-Hans"] .rail .chip .nm{font-size:12px}
@media(max-width:900px){.langselect{max-width:105px}.tools{flex-wrap:wrap}}

/* M0/M1 v0.2: avoid clipping language and search controls at phone widths. */
.translation-warning{font-size:11px;color:var(--accent);font-style:italic}
@media(max-width:520px){
  .tools{gap:6px;min-width:0}
  .search{min-width:95px;flex:1 1 auto}
  .search input{min-width:0;width:100%;padding:0 10px;font-size:12px}
  .langselect{max-width:none;min-width:96px;flex:0 0 96px;padding:0 4px;font-size:11px}
}

.i18n-pilot-notice{font-size:10.5px!important;margin-top:2px!important;color:var(--accent)!important;letter-spacing:.02em}

/* i18n v0.2.1: Chinese lens label and header at phone widths (320–520px). */
html[lang="zh-Hans"] .lens .yr{white-space:nowrap;min-width:0}
@media(max-width:520px){
  html[lang="zh-Hans"] .lens .yr{font-size:24px}
  .brand h1{font-size:22px}
  .brand .beta{font-size:9px;padding:1px 5px 0;letter-spacing:.08em}
  .tools > *{flex-shrink:1}
}
@media(max-width:360px){
  html[lang="zh-Hans"] .lens .yr{font-size:20px}
  .brand h1{font-size:19px}
  .langselect{min-width:84px;flex-basis:84px}
}