*{box-sizing:border-box}
:root{--bg:#0b1020;--card:#111936;--muted:#b7c3d7;--text:#e7eefc;--accent:#4f7cff;--accent2:#38bdf8;--danger:#ef4444;color-scheme:dark}
html,body{height:100%}
body{margin:0;font-family:'Inter',system-ui,Segoe UI,Roboto,Arial,sans-serif;background:linear-gradient(180deg,#0b1020 0%,#0b1428 45%,#0d1530 100%);color:var(--text);overflow:hidden}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid rgba(255,255,255,.06);backdrop-filter:blur(6px);position:sticky;top:0;z-index:10}
.topbar h1{margin:0;font-size:18px}
.topbar .brand{display:flex;align-items:center;gap:10px}
.topbar .brand .logo{display:inline-flex;align-items:center;justify-content:center}
.topbar .right{display:flex;gap:10px;align-items:center}
.topbar .right a{color:var(--muted);text-decoration:none}
.topbar .gh-link{display:inline-flex;align-items:center;gap:6px;padding:4px 8px;border:1px solid rgba(255,255,255,.18);border-radius:8px;color:var(--text)}
.topbar .gh-link:hover{filter:brightness(1.08)}
.container{padding:16px;display:flex;gap:10px;min-height:calc(100vh - 64px);height:calc(100vh - 64px);overflow:hidden;position:relative}
@media (max-width:1100px){.container{flex-direction:column}}
/* Split layout defaults: 40% inputs / 60% outputs */
.panel.inputs{flex:0 0 40%; min-width:260px}
.panel.outputs{flex:1 1 0; display:flex; flex-direction:column; min-height:0; overflow:hidden}
.splitter{width:8px; flex:0 0 8px; cursor:col-resize; display:flex; align-items:center; justify-content:center; position:relative}
.splitter::before{content:""; width:2px; height:70%; background:rgba(255,255,255,.18); border-radius:2px}
/* Collapse button on splitter */
.collapse-btn{position:absolute; top:6px; transform:translateX(-50%); left:50%; width:22px;height:22px;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);color:var(--text);border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:1;padding:0}
/* Docked-left minimized state: splitter becomes a slim overlay at far left with only the icon visible */
.splitter.docked-left{position:absolute; left:0; top:0; bottom:0; width:16px; cursor:pointer; z-index:5}
.splitter.docked-left::before{display:none}
.splitter.docked-left .collapse-btn{top:50%; left:50%; transform:translate(-50%,-50%); width:16px; height:16px}
/* Mobile/narrow: stack and hide splitter */
@media (max-width:1100px){.splitter{display:none}.panel.inputs,.panel.outputs{flex:1 1 auto;min-width:auto; height:auto}}
/* Collapsed left panel */
.panel.inputs.collapsed{flex-basis:0 !important;width:0 !important;min-width:0 !important;padding:0 !important;border-width:0 !important;overflow:hidden}
.panel.inputs.collapsed .panel-header, .panel.inputs.collapsed .tab-panel{display:none}
.panel{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.panel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.panel h2{margin:8px 0;font-size:16px}
.controls{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.toggle{display:flex;align-items:center;gap:8px;color:var(--muted)}
.tabs{display:flex;gap:8px}
.tab{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);color:var(--text);padding:6px 10px;border-radius:8px}
.tab.active{background:var(--accent);border-color:transparent}
.mode{display:flex;gap:8px;align-items:center}
/* Make inputs panel and tab content flexible to let Ace fill height */
.panel.inputs{display:flex;flex-direction:column;min-height:60vh}
.tab-panel{margin-top:8px;display:flex;flex-direction:column;min-height:0;overflow:auto}
#tabEditor{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}
#editor{width:100%;border-radius:8px;overflow:hidden;border:1px solid rgba(255,255,255,.08);flex:1;min-height:240px;height:auto}
.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.form-grid label{display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--muted)}
.form-grid input, .grid select, .grid input{background:rgba(255,255,255,.06);color:var(--text);border:1px solid rgba(255,255,255,.18);padding:6px 8px;border-radius:8px}
.grid{width:100%;border-collapse:collapse;margin:8px 0}
.grid th,.grid td{border:1px solid rgba(255,255,255,.12);padding:6px;font-size:12px}
.grid th{color:var(--muted);text-align:left}
.hint{margin-top:8px;color:var(--muted);font-size:12px}
.error{margin-top:8px;color:#fff;background:rgba(239,68,68,.15);border:1px solid rgba(239,68,68,.4);padding:8px;border-radius:8px;white-space:pre-wrap}
.items-bar{display:flex;align-items:center;gap:8px;margin:6px 0}
.items-bar .label{color:var(--muted);font-size:12px}
.items-list{display:flex;flex-wrap:wrap;gap:6px}
.items-list .pill{padding:4px 8px;border-radius:999px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);cursor:pointer}
.items-list .pill.active{background:var(--accent);border-color:transparent}
.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:8px 0 12px}
.kpi{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:10px;padding:10px}
.kpi .label{color:var(--muted);font-size:12px}
.kpi .value{font-weight:700;font-size:18px;margin-top:4px}
.raw{margin-top:12px}
.code{background:rgba(0,0,0,.35);border-radius:8px;padding:12px;overflow:auto;max-height:240px;border:1px solid rgba(255,255,255,.08)}
.charts-container{display:flex;flex-direction:column;gap:16px;flex:1;min-height:0}
.chart-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px}
.chart-card .title{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.chart-controls{display:flex;gap:8px;align-items:center}
canvas{background:rgba(255,255,255,.02);border:1px solid rgba(255,255,255,.08);border-radius:8px;flex:1;min-height:140px;height:100%}
button{background:linear-gradient(180deg,var(--accent),#365dda);border:none;color:#fff;padding:6px 10px;border-radius:8px;cursor:pointer}
button:hover{filter:brightness(1.05)}
select{background:rgba(255,255,255,.06);color:var(--text);border:1px solid rgba(255,255,255,.18);padding:6px 10px;border-radius:8px}
@media (max-width:900px){.form-grid{grid-template-columns:1fr}}

/* Multi-calc form */
.form-multi{display:flex;flex-direction:column;gap:12px}
.calc-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:10px;padding:10px}
.calc-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;cursor:pointer}
.calc-header .left{display:flex;align-items:center;gap:8px}
.calc-header .actions{display:flex;gap:8px}
.calc-card.collapsed .calc-body{display:none}
/* expand/collapse arrow button */
.toggle-btn{width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:var(--text);border-radius:6px;font-size:12px;line-height:1;cursor:pointer}
.toggle-btn:hover{filter:brightness(1.1)}

/* Custom legend */
.chart-legend{display:flex;flex-direction:column;gap:6px;margin-top:8px}
.chart-legend.scroll{max-height:160px;overflow:auto;padding-right:4px}
.legend-item{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:8px;padding:6px 8px}
.legend-item .swatch{width:14px;height:14px;border-radius:3px;border:2px solid rgba(255,255,255,.2);display:inline-block}
.legend-item .legend-text{color:var(--text);font-size:12px}
.legend-hover{position:fixed;z-index:1000;pointer-events:none;background:rgba(9,12,24,.96);border:1px solid rgba(255,255,255,.12);border-radius:8px;box-shadow:0 10px 30px rgba(0,0,0,.4);padding:8px;min-width:220px;max-width:320px}
.legend-hover .legend-hover-header{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.legend-hover .legend-hover-inner .row{display:flex;justify-content:space-between;gap:8px;font-size:12px;color:var(--muted)}
.legend-hover .mini{margin:4px 0 6px 18px;padding:0;color:var(--muted);font-size:12px}
.legend-hover .mini li{margin:2px 0}

/* Icon button */
.icon-btn{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);border-radius:8px;color:var(--text);padding:4px 8px;line-height:1}
.icon-btn:hover{filter:brightness(1.08)}

/* Topbar repo controls */
.sep{display:inline-block;width:1px;height:20px;background:rgba(255,255,255,.18)}
.topbar .repo-controls{display:flex;gap:8px;align-items:center}
.topbar .repo-controls button{font-size:12px}

/* Modal backdrop and centered dialogs */
.backdrop{position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(2px);z-index:1000}
body.modal-open{overflow:hidden}
.repo-dialogs{position:fixed;inset:0;z-index:1001;display:flex;align-items:center;justify-content:center;pointer-events:none}
.repo-dialog{pointer-events:auto;max-width:520px;width:92vw;background:rgba(15,18,32,.98);border:1px solid rgba(255,255,255,.14);border-radius:10px;padding:12px;box-shadow:0 10px 30px rgba(0,0,0,.4);animation:fadeIn .12s ease-out}
@keyframes fadeIn{from{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}
.repo-dialog-header{font-weight:700;margin-bottom:8px}
.repo-dialog-body{display:grid;gap:8px}
.repo-dialog-body label{display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--muted)}
.repo-dialog-body input,.repo-dialog-body select{background:rgba(255,255,255,.06);color:var(--text);border:1px solid rgba(255,255,255,.18);padding:6px 8px;border-radius:8px}
.repo-dialog-actions{display:flex;gap:8px;margin-top:8px;justify-content:flex-end}

/* helpers */
.muted{color:var(--muted);font-size:12px}


/* Dropdown lists (ensure dark-themed popup across browsers) */
/* Base select styling already present; enforce consistent dark popup and readable text */
select, .form-grid select, .grid select, .repo-dialog-body select {
  background: rgba(255,255,255,.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,.18);
}
/* Options panel colors (Chrome/Edge/Firefox honor these) */
select option, select optgroup {
  background-color: #0f1220; /* dark panel */
  color: var(--text);
}
/* Highlighted/selected option */
select option:checked, select option:focus, select option:hover {
  background-color: #1a2244;
  color: var(--text);
}
/* Improve focus visibility for accessibility */
select:focus {
  outline: 2px solid var(--accent2);
  outline-offset: 2px;
}

/* Tabs-first header variant (no title on the left) */
.tabs-header{justify-content:flex-start}
.tabs-header .tabs{margin-right:auto}
/* Ensure any tab-panel hidden state collapses layout across browsers */
.tab-panel[hidden]{display:none !important}