:root{
  --bg:#0a0f14;
  --panel:rgba(255,255,255,.05);
  --panel-2:rgba(255,255,255,.09);
  --line:rgba(205,230,228,.14);
  --line-2:rgba(205,230,228,.30);
  --text:#eef4f3;
  --text-2:#a9bdbc;
  --text-3:#7d9392;
  --text-4:#4e5e5d;
  --accent:#7fc2c4;
  --accent-2:#2a8a8d;
  --gold:#e8c468;
  --night:#0c1420;
  --dawn:#223447;
  --work:#1f7a7d;
  --work-2:#39a6a9;
  --slate:#060a0d;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --serif:'Instrument Serif',Georgia,'Times New Roman',serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
[hidden]{display:none !important}
body.boot *{transition:none !important; animation:none !important}
html,body{height:100%}
body{
  background:var(--bg); color:var(--text); font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(130% 95% at 50% -10%, #122026 0%, #0d1518 50%, #07090b 100%);
  background-attachment:fixed;
}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:6px}
button{font-family:inherit; color:inherit; background:none; border:none}
input{font-family:inherit; color:inherit}

.page{display:flex; flex-direction:column; min-height:100vh}

/* ---------- top bar ---------- */
.bar{
  display:flex; justify-content:space-between; align-items:center; gap:12px;
  padding:max(14px, env(safe-area-inset-top)) 20px 0; flex:none;
}
.home,.icon{
  display:inline-flex; align-items:center; gap:7px; height:38px;
  color:var(--text); text-decoration:none; font:500 14px/1 var(--sans);
  background:var(--panel); border:1px solid var(--line); border-radius:999px;
  cursor:pointer; transition:background .15s, border-color .15s;
}
.home{padding:0 14px 0 10px}
.home span{font-family:var(--serif); font-size:18px; letter-spacing:.01em}
.icon{width:38px; justify-content:center; padding:0}
.home:hover,.icon:hover{background:var(--panel-2); border-color:var(--line-2)}

/* ---------- layout ---------- */
main{
  flex:1; display:grid; grid-template-columns:minmax(0,1fr) 300px;
  gap:24px; padding:10px 20px max(22px, env(safe-area-inset-bottom));
  align-items:start; align-content:start;
  width:100%; max-width:1180px; margin:0 auto;
}
.stage{display:flex; flex-direction:column; gap:14px; min-width:0}
.titleblock{max-width:700px; padding:6px 2px 2px}
.kicker{font-size:11.5px; font-weight:600; letter-spacing:.15em; text-transform:uppercase; color:var(--text-3)}
h1{
  font-family:var(--serif); font-weight:400; font-size:clamp(32px, 4.2vw, 54px);
  line-height:.98; letter-spacing:-.01em; margin:4px 0 8px;
}
.sub{font-size:14.5px; line-height:1.55; color:var(--text-2); max-width:66ch}
.sub b{font-weight:600; color:var(--text)}
.lbl{font-size:11px; font-weight:600; letter-spacing:.12em; text-transform:uppercase; color:var(--text-3)}

/* ---------- composer ---------- */
.composer{display:flex; flex-direction:column; gap:10px}
.regions{display:flex; flex-direction:column; gap:7px}
.regionRow{display:flex; align-items:baseline; gap:8px; flex-wrap:wrap}
.regionName{flex:none; width:118px; font-size:10.5px; font-weight:600; letter-spacing:.08em; text-transform:uppercase; color:var(--text-3)}
.chips{display:flex; flex-wrap:wrap; gap:6px; flex:1 1 auto}
.chip{
  padding:5px 11px; border-radius:999px; background:var(--panel); border:1px solid var(--line);
  font:600 12px/1 var(--sans); color:var(--text-2); cursor:pointer;
  transition:background .14s, border-color .14s, color .14s;
}
.chip:hover{background:var(--panel-2); border-color:var(--line-2); color:var(--text)}
.chip.active{background:rgba(127,194,196,.18); border-color:rgba(127,194,196,.55); color:var(--accent)}
.chip.disabled{opacity:.35; cursor:not-allowed}

.controlsRow{display:flex; flex-wrap:wrap; align-items:end; gap:8px; margin-top:4px}
.field{display:flex; flex-direction:column; gap:5px; flex:0 1 160px; min-width:0}
.flbl{font-size:10.5px; font-weight:600; letter-spacing:.1em; text-transform:uppercase; color:var(--text-3)}
.field input{
  height:40px; padding:0 12px; border-radius:11px;
  background:var(--panel); border:1px solid var(--line); color:var(--text);
  font:500 14px/1 var(--mono); width:100%;
}
.field input:focus{border-color:var(--accent-2)}
.field input::-webkit-calendar-picker-indicator{filter:invert(.8)}

.btn{
  display:flex; align-items:center; justify-content:center; text-align:center; gap:8px;
  padding:0 14px; height:40px; border-radius:11px; cursor:pointer; flex:none;
  background:var(--panel-2); border:1px solid var(--line);
  font:600 12.5px/1 var(--sans); color:var(--text-2); white-space:nowrap;
  transition:background .14s, border-color .14s, transform .08s, color .14s;
}
.btn:hover{background:rgba(255,255,255,.14); border-color:var(--line-2); color:var(--text)}
.btn:active{transform:translateY(1px)}
.status{font-size:11.5px; line-height:1.5; color:var(--gold); min-height:1.3em; max-width:66ch}

/* ---------- ribbon chart ---------- */
.slate{
  position:relative; width:100%; overflow:hidden; border-radius:14px;
  background:var(--slate); border:1px solid var(--line);
  box-shadow:0 22px 46px -30px #000, 0 1px 0 rgba(255,255,255,.04) inset;
  padding:16px 16px 8px;
}
.ribbons{display:flex; gap:10px; align-items:flex-start}
.labels{display:flex; flex-direction:column; gap:6px; flex:none; width:138px}
.rowLabel{height:32px; display:flex; flex-direction:column; justify-content:center; line-height:1.2}
.rowLabel .nm{font:600 12.5px/1.15 var(--sans); color:var(--text); white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
.rowLabel .off{font:500 10.5px/1 var(--mono); color:var(--text-3)}
.trackArea{position:relative; flex:1; min-width:0; display:flex; flex-direction:column; gap:6px}
.track{height:32px; border-radius:6px; overflow:hidden; display:flex; background:var(--night); touch-action:none; cursor:crosshair}
.seg{flex:1 1 0; height:100%}
.seg.night{background:var(--night)}
.seg.dawn{background:var(--dawn)}
.seg.work{background:linear-gradient(180deg, var(--work-2), var(--work))}
.band{position:absolute; top:0; bottom:0; background:rgba(232,196,104,.16); border-left:1.5px dashed rgba(232,196,104,.65); border-right:1.5px dashed rgba(232,196,104,.65); pointer-events:none; z-index:2}
.cursor{position:absolute; top:0; bottom:0; width:0; border-left:1.5px solid var(--text); pointer-events:none; z-index:3; opacity:0}
.cursor.show{opacity:1}
.axis{display:flex; gap:10px; margin-top:4px}
.axisSpacer{flex:none; width:138px}
.axisTicks{position:relative; flex:1; min-width:0; height:16px}
.tick{position:absolute; top:0; transform:translateX(-50%); font:500 10px/1 var(--mono); color:var(--text-4)}

.caption{font-size:12px; color:var(--text-3); display:flex; align-items:center; gap:12px; flex-wrap:wrap}
.dot{display:inline-block; width:9px; height:9px; border-radius:3px; margin-right:5px; vertical-align:middle}
.dot.night{background:var(--night); border:1px solid var(--line-2)}
.dot.dawn{background:var(--dawn)}
.dot.work{background:var(--work-2)}
.dot.band{background:rgba(232,196,104,.35); border:1.5px dashed rgba(232,196,104,.65)}

/* ---------- panel ---------- */
.panel{
  display:flex; flex-direction:column; gap:14px; position:sticky; top:12px;
  background:var(--panel); border:1px solid var(--line); border-radius:16px;
  padding:14px 15px 13px;
}
.readout{border-radius:11px; padding:12px 13px; border:1px solid var(--line); background:var(--panel-2)}
.rhead{display:block; font:500 12px/1.3 var(--sans); color:var(--text-3); margin-bottom:9px}
#rUtc{color:var(--accent); font-family:var(--mono); font-weight:600}
.rlist{display:flex; flex-direction:column; gap:7px}
.rrow{display:flex; justify-content:space-between; align-items:baseline; gap:8px; font-size:12.5px}
.rrow .rn{color:var(--text-2); white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
.rrow .rv{font-family:var(--mono); font-weight:600; color:var(--text); white-space:nowrap}
.rrow .rst{font-size:10px; text-transform:uppercase; letter-spacing:.06em; color:var(--text-4); margin-left:6px}

.grp{display:flex; flex-direction:column; gap:8px}
.overlapCard{
  border-radius:11px; padding:12px 13px; border:1px solid var(--line); background:var(--panel-2);
  font-size:13px; line-height:1.55; color:var(--text-2);
}
.overlapCard b{color:var(--text)}
.overlapCard .ow{font-family:var(--mono); color:var(--gold); font-weight:600}

.foot{font-size:11.5px; line-height:1.6; color:var(--text-3); border-top:1px solid var(--line); padding-top:12px}
.link{color:var(--accent); cursor:pointer; font:inherit; font-weight:600; text-align:left; text-decoration:underline; text-underline-offset:2px}
.link:hover{color:#b3e2e3}

/* ---------- about ---------- */
dialog{border:none; padding:0; background:transparent; max-width:min(700px, 92vw); max-height:86vh; margin:auto}
dialog::backdrop{background:rgba(5,7,9,.7); backdrop-filter:blur(3px)}
.about{
  position:relative; background:#0e1417; border:1px solid var(--line);
  border-radius:18px; padding:26px 28px 24px; overflow-y:auto; max-height:86vh;
  box-shadow:0 30px 60px -28px #000;
}
.about h2{font-family:var(--serif); font-weight:400; font-size:29px; line-height:1.1; margin:4px 0 14px; color:var(--text)}
.about h3{font-family:var(--serif); font-weight:400; font-size:19px; line-height:1.1; margin:20px 0 10px; color:var(--text)}
.about p{font-size:14.5px; line-height:1.68; color:var(--text-2); margin-bottom:12px}
.about p b{color:var(--text); font-weight:600}
.about p i{font-style:italic; color:var(--text)}
.about code{font-family:var(--mono); font-size:13px; background:var(--panel-2); padding:1px 5px; border-radius:5px}
.about .fine{font-size:12.5px; color:var(--text-3); border-top:1px solid var(--line); padding-top:12px; margin-top:4px; margin-bottom:0}
.x{
  position:absolute; top:14px; right:14px; width:32px; height:32px; cursor:pointer;
  display:flex; align-items:center; justify-content:center; color:var(--text-3);
  background:var(--panel-2); border:1px solid var(--line); border-radius:999px;
}
.x:hover{color:var(--text); border-color:var(--line-2)}

/* ---------- narrow ---------- */
@media (max-width:920px){
  main{grid-template-columns:minmax(0,1fr); gap:16px; padding:8px 14px max(20px, env(safe-area-inset-bottom))}
  .panel{position:static}
  h1{font-size:clamp(28px, 7.6vw, 38px)}
  .sub{font-size:14px}
  .regionName{width:100%; margin-top:2px}
  .regionRow{flex-direction:column; align-items:flex-start; gap:4px}
}
@media (max-width:600px){
  .labels{width:96px}
  .axisSpacer{width:96px}
  .rowLabel .nm{font-size:10.5px}
  .rowLabel .off{font-size:9.5px}
  .track{height:28px}
  .controlsRow{flex-direction:column; align-items:stretch}
  .field{flex:none}
  .btn{width:100%}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none !important; animation:none !important}
}