:root,[data-theme="dark"]{
  --bg:#07090d; --panel:#0b0e14; --panel-2:#10141c; --hover:#151b25; --line:#1b212c; --line-2:#262e3b;
  --text:#e6e9ef; --muted:#8b95a7; --dim:#5b6577;
  --up:#22c55e; --down:#ef4444; --up-bg:rgba(34,197,94,.13); --down-bg:rgba(239,68,68,.13);
  --s-fast:#c4820c; --s-slow:#8b7cff; --s-eq:#1aa3c2; --s-bh:#7d8799;
  --accent:#1aa3c2; --accent-ink:#06121a;
  --grid:rgba(139,149,167,.08); --cross:rgba(230,233,239,.35);
  --div-neg:#e0603a; --div-mid:#2a303b; --div-pos:#1aa3c2;
  --shadow:0 20px 60px -20px rgba(0,0,0,.7);
  color-scheme:dark;
}
[data-theme="light"]{
  --bg:#eef1f5; --panel:#ffffff; --panel-2:#f6f8fb; --hover:#eef2f7; --line:#e3e8ef; --line-2:#d3dae4;
  --text:#0f1724; --muted:#536079; --dim:#7a869b;
  --up:#16a34a; --down:#dc2626; --up-bg:rgba(22,163,74,.12); --down-bg:rgba(220,38,38,.1);
  --s-fast:#c27c00; --s-slow:#5b4fd6; --s-eq:#0a8fb0; --s-bh:#8a94a6;
  --accent:#0a8fb0; --accent-ink:#ffffff;
  --grid:rgba(15,23,36,.06); --cross:rgba(15,23,36,.35);
  --div-neg:#d4532c; --div-mid:#e6e9ee; --div-pos:#0a8fb0;
  --shadow:0 20px 60px -20px rgba(15,23,36,.25);
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font:13px/1.45 "IBM Plex Sans",system-ui,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
button,input,select{font:inherit;color:inherit}
h1,h2,p{margin:0}
a{color:inherit}
.muted{color:var(--muted);font-weight:400}
.skip{position:absolute;left:-999px;top:6px;z-index:100;background:var(--accent);color:var(--accent-ink);padding:6px 10px;border-radius:6px}
.skip:focus{left:6px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
kbd{font:500 11px "IBM Plex Mono",monospace;padding:1px 6px;border-radius:5px;border:1px solid var(--line-2);border-bottom-width:2px;background:var(--panel-2);color:var(--text)}
.num,.kpi b,.wl,.ob,.tape,.ohlc,.metrics,.sym,.clock{font-family:"IBM Plex Mono",monospace;font-variant-numeric:tabular-nums}

.app{height:100vh;height:100dvh;display:grid;grid-template-rows:auto auto 1fr auto;gap:6px;padding:6px}

/* top bar */
.top{display:flex;align-items:center;gap:20px;height:46px;padding:0 10px 0 14px;background:var(--panel);border:1px solid var(--line);border-radius:10px}
.brand{display:flex;align-items:center;gap:9px;font-size:14px;letter-spacing:-.01em;color:var(--muted);white-space:nowrap}
.brand b{color:var(--text);font-weight:600}
.sym{display:flex;align-items:baseline;gap:12px;padding-left:20px;border-left:1px solid var(--line);white-space:nowrap;min-width:0}
.sym strong{font-size:14px;font-weight:600}
.sym__px{font-size:16px;font-weight:600;transition:color .3s}
.chg{font-size:12px;padding:2px 7px;border-radius:5px}
.chg.up{color:var(--up);background:var(--up-bg)}.chg.down{color:var(--down);background:var(--down-bg)}
.flash-up{color:var(--up)!important}.flash-down{color:var(--down)!important}
.top__right{margin-left:auto;display:flex;align-items:center;gap:8px}
.feed{display:inline-flex;align-items:center;gap:7px;font:500 11px "IBM Plex Mono",monospace;color:var(--muted);padding:5px 9px;border:1px solid var(--line);border-radius:999px;white-space:nowrap}
.feed i{width:7px;height:7px;border-radius:50%;background:var(--up);box-shadow:0 0 0 0 var(--up);animation:ping 2s infinite}
.feed.paused i{background:var(--s-fast);animation:none}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(34,197,94,.5)}70%{box-shadow:0 0 0 7px rgba(34,197,94,0)}100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}}
.clock{color:var(--muted);font-size:12px;min-width:62px;text-align:right}
.icon-btn{width:32px;height:32px;display:grid;place-items:center;border-radius:8px;border:1px solid var(--line);background:var(--panel-2);color:var(--muted);cursor:pointer;transition:color .15s,border-color .15s}
.icon-btn:hover,.icon-btn[aria-pressed="true"]{color:var(--text);border-color:var(--line-2)}

/* kpis */
.kpis{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
.kpi{padding:10px 14px;background:var(--panel);border:1px solid var(--line);border-radius:10px;min-width:0}
.kpi p{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.kpi b{display:block;margin-top:3px;font-size:17px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.kpi span{display:block;font-size:11px;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.kpi b.up{color:var(--up)}.kpi b.down{color:var(--down)}

/* main grid */
.grid{--lw:236px;--rw:300px;display:grid;grid-template-columns:var(--lw) 6px minmax(0,1fr) 6px var(--rw);min-height:0}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;display:flex;flex-direction:column;min-height:0;min-width:0;overflow:hidden}
.panel__head{display:flex;align-items:center;gap:10px;justify-content:space-between;height:38px;flex:none;padding:0 8px 0 12px;border-bottom:1px solid var(--line)}
.panel__head--sub{border-top:1px solid var(--line)}
.panel__head h2{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mini-btn{flex:none;width:24px;height:24px;border-radius:6px;border:1px solid transparent;background:none;color:var(--muted);cursor:pointer;line-height:1}
.mini-btn:hover{background:var(--hover);color:var(--text)}
.gutter{position:relative;cursor:col-resize;touch-action:none}
.gutter::after{content:"";position:absolute;inset:30% 2px;border-radius:2px;background:transparent;transition:background .2s}
.gutter:hover::after,.gutter.is-drag::after,.gutter:focus-visible::after{background:var(--accent)}
.gutter--h{cursor:row-resize}
.gutter--h::after{inset:2px 40%}

/* collapsed side panels */
.grid.watch-collapsed{--lw:40px}.grid.book-collapsed{--rw:40px}
.panel.is-collapsed .panel__head{flex-direction:column-reverse;height:auto;padding:8px 0;border:0;gap:12px}
.panel.is-collapsed .panel__head h2{writing-mode:vertical-rl;transform:rotate(180deg)}
.panel.is-collapsed>:not(.panel__head:first-child){display:none}
.panel.is-collapsed .panel__head--sub{display:none}
.watch.is-collapsed .collapse,.book.is-collapsed .collapse{transform:scaleX(-1)}

/* watchlist */
.wl{list-style:none;margin:0;padding:4px;overflow:auto;flex:1}
.wl li{display:grid;grid-template-columns:1fr auto;grid-template-rows:auto auto;gap:0 8px;align-items:center;padding:8px 8px;border-radius:7px;cursor:pointer;position:relative}
.wl li:hover{background:var(--hover)}
.wl li[aria-selected="true"]{background:var(--panel-2);box-shadow:inset 2px 0 0 var(--accent)}
.wl .t{font-weight:600;font-size:12.5px}
.wl .t small{font-weight:400;color:var(--dim);margin-left:6px;font-family:"IBM Plex Sans",sans-serif;font-size:11px}
.wl .p{text-align:right;font-size:12.5px}
.wl .c{grid-column:2;text-align:right;font-size:11px}
.wl canvas{grid-row:2;width:100%;height:22px;margin-top:3px}
.wl .k{position:absolute;right:8px;top:-1px;font-size:9px;color:var(--dim);display:none}
.up-t{color:var(--up)}.down-t{color:var(--down)}

/* center */
.center{display:flex;flex-direction:column;min-height:0;min-width:0;--bh:350px}
.chart-panel{flex:1;min-height:180px}
.chart-head{gap:14px;justify-content:flex-start}
.seg{display:inline-flex;padding:2px;border-radius:7px;background:var(--panel-2);border:1px solid var(--line)}
.seg button{border:0;background:none;padding:3px 9px;border-radius:5px;font:500 11.5px "IBM Plex Mono",monospace;color:var(--muted);cursor:pointer}
.seg button.is-on{background:var(--panel);color:var(--text);box-shadow:0 1px 2px rgba(0,0,0,.25),0 0 0 1px var(--line-2)}
.legend{display:flex;gap:4px}
.lg{display:inline-flex;align-items:center;gap:6px;border:1px solid transparent;background:none;padding:3px 8px;border-radius:6px;font:500 11.5px "IBM Plex Mono",monospace;color:var(--muted);cursor:pointer;white-space:nowrap}
.lg b{color:var(--text);font-weight:500}
.lg:hover{background:var(--hover)}
.lg:not(.is-on){opacity:.45}
.lg:not(.is-on) .sw{background:transparent!important;box-shadow:inset 0 0 0 1.5px var(--dim)}
.sw{display:inline-block;width:12px;height:3px;border-radius:2px}
.sw--fast{background:var(--s-fast)}.sw--slow{background:var(--s-slow)}.sw--eq{background:var(--s-eq)}
.sw--bh{background:repeating-linear-gradient(90deg,var(--s-bh) 0 4px,transparent 4px 6px)}
.ohlc{margin-left:auto;font-size:11.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ohlc b{color:var(--text);font-weight:500;margin-right:8px}
.chart-wrap,.eq__wrap{position:relative;flex:1;min-height:0}
.chart-wrap canvas,.eq__wrap canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:none}
#chart{cursor:crosshair}
#chart.is-drag{cursor:grabbing}
.tip{position:absolute;z-index:3;pointer-events:none;padding:8px 10px;border-radius:8px;background:var(--panel);border:1px solid var(--line-2);box-shadow:var(--shadow);font:12px/1.5 "IBM Plex Mono",monospace;white-space:nowrap}
.tip .r{display:flex;justify-content:space-between;gap:16px}
.tip .r span{color:var(--muted)}
.tip .d{color:var(--muted);margin-bottom:3px;font-size:11px}

/* backtest */
.bt{height:var(--bh);flex:none}
.bt.is-collapsed{height:40px}
.bt.is-collapsed .bt__body{display:none}
.bt.is-collapsed .collapse{transform:rotate(180deg)}
.bt__body{flex:1;display:flex;flex-direction:column;min-height:0}
.bt__form{display:flex;flex-wrap:wrap;align-items:flex-end;gap:10px;padding:8px 12px;border-bottom:1px solid var(--line)}
.bt__form label{display:grid;gap:3px;font-size:10.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.bt__form input[type=number],.bt__form select{width:86px;height:30px;padding:0 8px;border-radius:7px;border:1px solid var(--line-2);background:var(--panel-2);font:500 12.5px "IBM Plex Mono",monospace;text-transform:none;letter-spacing:0}
.bt__form select{width:100px}
.bt__form input[aria-invalid="true"]{border-color:var(--down)}
.bt__form .tgl{display:flex;align-items:center;gap:6px;height:30px;text-transform:none;letter-spacing:0;font-size:12.5px;color:var(--text)}
.tgl input{accent-color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;border-radius:7px;border:0;background:var(--accent);color:var(--accent-ink);font-weight:600;font-size:12.5px;cursor:pointer}
.btn:hover{filter:brightness(1.1)}
.btn kbd{background:rgba(0,0,0,.18);border-color:rgba(0,0,0,.2);color:inherit;padding:0 5px}
.bt__err{font-size:12px;color:var(--down);align-self:center}
.bt__err:empty{display:none}
.bt__results{flex:1;min-height:0;display:grid;grid-template-columns:250px minmax(0,1fr) 230px}
.metrics{margin:0;display:grid;grid-template-columns:1fr 1fr;align-content:start;border-right:1px solid var(--line)}
.metrics div{padding:6px 10px;border-bottom:1px solid var(--line)}
.metrics div:nth-child(odd){border-right:1px solid var(--line)}
.metrics dt{font-family:"IBM Plex Sans",sans-serif;font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.metrics dd{margin:0;font-size:14px;font-weight:600;line-height:1.3}
.metrics dd small{display:block;font-size:10px;font-weight:400;color:var(--dim)}
.eq{display:flex;flex-direction:column;min-width:0;min-height:0;padding:8px 10px 6px}
.eq__legend{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:11.5px;margin-bottom:4px}
.eq__legend span{display:inline-flex;align-items:center;gap:6px}
.heat{border-left:1px solid var(--line);padding:8px 10px;display:flex;flex-direction:column;gap:6px;min-height:0}
.heat__title{font-size:11.5px;font-weight:600}
.heat__grid{flex:1;min-height:0;display:grid;grid-template-columns:22px repeat(8,1fr);grid-auto-rows:minmax(0,1fr);gap:2px;font:10px "IBM Plex Mono",monospace;color:var(--dim)}
.heat__grid .ax{display:flex;align-items:center;justify-content:center}
.heat__grid button{border:0;border-radius:3px;padding:0;cursor:pointer;min-height:10px;position:relative}
.heat__grid button:hover,.heat__grid button.is-sel{outline:2px solid var(--text);outline-offset:0;z-index:1}
.heat__scale{display:flex;align-items:center;gap:5px;font:10px "IBM Plex Mono",monospace;color:var(--dim)}
.heat__scale i{flex:1;height:6px;border-radius:3px;background:linear-gradient(90deg,var(--div-neg),var(--div-mid))}
.heat__scale i.pos{background:linear-gradient(90deg,var(--div-mid),var(--div-pos))}
.heat__note{font-size:10.5px;color:var(--dim);line-height:1.35}

/* order book */
.book{min-width:0}
.ob{display:flex;flex-direction:column;flex:1;min-height:0;font-size:12px}
.ob__hdr{display:grid;grid-template-columns:1fr 1fr 1fr;padding:6px 12px;font-family:"IBM Plex Sans",sans-serif;font-size:10.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--dim)}
.ob__hdr span:not(:first-child){text-align:right}
.ob__side{flex:1;min-height:0;overflow:hidden;display:flex;flex-direction:column}
.ob__asks{justify-content:flex-end}
.row{position:relative;display:grid;grid-template-columns:1fr 1fr 1fr;padding:1.5px 12px;line-height:1.45}
.row span:not(:first-child){text-align:right}
.row i{position:absolute;right:0;top:1px;bottom:1px;z-index:0;transition:width .35s}
.row span{position:relative;z-index:1}
.ob__asks .row span:first-child{color:var(--down)}
.ob__bids .row span:first-child{color:var(--up)}
.ob__asks .row i{background:var(--down-bg)}
.ob__bids .row i{background:var(--up-bg)}
.row.flash{animation:fl .6s}
@keyframes fl{from{background:var(--hover)}}
.ob__mid{display:flex;align-items:baseline;justify-content:space-between;padding:7px 12px;border-block:1px solid var(--line);background:var(--panel-2)}
.ob__mid b{font-size:15px}
.ob__mid span{font-size:11px;color:var(--muted)}
.tape{flex:0 0 34%;min-height:0;display:flex;flex-direction:column;font-size:12px;overflow:hidden}
#tape-rows{overflow:hidden;flex:1}
#tape-rows .row span:last-child{color:var(--dim)}
.tr-in{animation:trin .4s}
@keyframes trin{from{background:var(--hover)}}

/* footer */
.foot{display:flex;justify-content:space-between;gap:10px 24px;flex-wrap:wrap;padding:6px 8px 2px;font-size:11.5px;color:var(--muted)}
.foot a{color:var(--text)}
.demo-badge{display:inline-block;margin-right:8px;padding:1px 8px;border-radius:5px;background:color-mix(in srgb,var(--s-fast) 18%,transparent);color:var(--text);font-weight:600;border:1px solid color-mix(in srgb,var(--s-fast) 45%,transparent)}

/* help dialog */
.help{border:1px solid var(--line-2);border-radius:14px;background:var(--panel);color:var(--text);padding:22px 24px;width:min(440px,calc(100vw - 32px));box-shadow:var(--shadow)}
.help::backdrop{background:rgba(5,8,12,.55);backdrop-filter:blur(3px)}
.help h2{font-size:16px;margin-bottom:14px}
.help dl{margin:0 0 14px;display:grid;gap:7px}
.help dl div{display:flex;justify-content:space-between;gap:16px;align-items:center}
.help dd{margin:0;color:var(--muted)}
.help form{margin-top:16px;display:flex;justify-content:flex-end}

/* responsive: stack into a scrolling document */
@media (max-width:1100px){
  .app{height:auto;min-height:100dvh}
  .kpis{grid-template-columns:repeat(3,1fr)}
  .grid{display:flex;flex-direction:column;gap:6px}
  .gutter{display:none}
  .center{order:1}
  .chart-panel{flex:none;height:440px}
  .bt{height:auto}
  .bt__results{grid-template-columns:1fr;}
  .metrics{grid-template-columns:repeat(4,1fr);border-right:0;border-bottom:1px solid var(--line)}
  .metrics div:nth-child(odd){border-right:0}.metrics div{border-right:1px solid var(--line)}
  .eq{height:280px}
  .heat{border-left:0;border-top:1px solid var(--line);height:300px}
  .watch{order:2;max-height:420px}
  .book{order:3;height:560px}
  .center{margin-bottom:0}
  .panel.is-collapsed{height:40px}
  .panel.is-collapsed .panel__head{flex-direction:row;height:38px;padding:0 8px 0 12px}
  .panel.is-collapsed .panel__head h2{writing-mode:horizontal-tb;transform:none}
  .watch .collapse,.book .collapse{transform:rotate(90deg)}
  .watch.is-collapsed .collapse,.book.is-collapsed .collapse{transform:rotate(-90deg)}
}
@media (max-width:640px){
  .top{flex-wrap:wrap;height:auto;padding:8px 10px;gap:8px 12px}
  .sym{order:3;flex-basis:100%;padding-left:0;border-left:0}
  .clock{display:none}
  .feed{font-size:10px}
  .kpis{grid-template-columns:repeat(2,1fr)}
  .kpi b{font-size:15px}
  .chart-panel{height:400px}
  .chart-head{flex-wrap:wrap;height:auto;padding:6px 8px;gap:6px}
  .ohlc{flex-basis:100%;margin-left:0;order:3}
  .metrics{grid-template-columns:1fr 1fr}
  .metrics div:nth-child(odd){border-right:1px solid var(--line)}
  .metrics div:nth-child(even){border-right:0}
  .bt__form input[type=number]{width:72px}
  .foot{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}