:root {
  --bg: #0d1117; --panel: #161b22; --border: #30363d;
  --fg: #e6edf3; --dim: #8b949e; --accent: #58a6ff; --hot: #ffa657;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 14px/1.45 -apple-system, system-ui, sans-serif; }
a { color: var(--accent); text-decoration: none; }

header { display: flex; align-items: baseline; gap: 12px; padding: 14px 18px 6px; flex-wrap: wrap; }
header h1 { margin: 0; font-size: 20px; letter-spacing: .5px; }
.sub { color: var(--dim); font-size: 12px; }
.chip { background: var(--panel); border: 1px solid var(--border); border-radius: 20px; padding: 2px 10px; font-size: 12px; color: var(--dim); font-family: var(--mono); }

#controls { padding: 8px 18px; display: flex; flex-direction: column; gap: 8px; }
#prompt { width: 100%; background: var(--panel); color: var(--fg); border: 1px solid var(--border); border-radius: 8px; padding: 10px; font-family: var(--mono); font-size: 13px; resize: vertical; }
#prompt:focus { outline: 1px solid var(--accent); }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
select, input[type=number], button { background: var(--panel); color: var(--fg); border: 1px solid var(--border); border-radius: 6px; padding: 5px 10px; font-size: 13px; }
input[type=number] { width: 56px; }
label { color: var(--dim); font-size: 13px; display: flex; align-items: center; gap: 5px; }
label.demo-locked { opacity: .45; cursor: help; }
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: #04121f; font-weight: 600; padding: 5px 18px; }
#jump-gen { color: #7ee787; border-color: #2ea04366; font-weight: 600; }
#jump-gen:hover { border-color: #7ee787; }
.toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.toggle button { border: 0; border-radius: 0; background: transparent; color: var(--dim); }
.toggle button.active { background: var(--accent); color: #04121f; font-weight: 600; }
#status { color: var(--dim); font-size: 12px; font-family: var(--mono); }
#status.err { color: #f85149; }
.hint { color: var(--dim); font-size: 12px; }
.pin-chip { display: inline-flex; align-items: center; gap: 5px; background: var(--panel); border: 1px solid var(--border); border-radius: 20px; padding: 1px 8px; margin-right: 6px; font-family: var(--mono); font-size: 12px; cursor: pointer; }
.pin-chip.sel { border-color: var(--hot); color: var(--hot); }
.pin-chip .x { color: var(--dim); }
.pin-chip .x:hover { color: #f85149; }

#workspace-panel { margin: 2px 18px 8px; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; }
#workspace-panel h3 { margin: 0 0 6px; font-size: 12px; color: var(--dim); font-weight: 500; }
.ws-chip { display: inline-flex; align-items: baseline; gap: 6px; background: #1c2129; border: 1px solid var(--border); border-radius: 20px; padding: 3px 12px; margin: 0 6px 6px 0; font-family: var(--mono); font-size: 13px; cursor: pointer; }
.ws-chip:hover { border-color: var(--hot); }
.ws-chip .score { color: var(--dim); font-size: 10px; }
.ws-chip .peak { color: var(--hot); font-size: 10px; opacity: .8; }
.ws-chip.pop { animation: chip-in .35s cubic-bezier(.2, 1.4, .4, 1); }
@keyframes chip-in {
  from { transform: scale(.55); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.flash { animation: border-flash .7s ease-out; }
@keyframes border-flash {
  from { border-color: var(--accent); box-shadow: 0 0 14px rgba(88, 166, 255, .35); }
  to { border-color: var(--border); box-shadow: none; }
}

.welcome { padding: 26px 30px; max-width: 640px; color: var(--dim); font-size: 14px; line-height: 1.6; }
.welcome b, .welcome i, .welcome em { color: var(--fg); }
.ex-chip { background: #1c2129; border: 1px solid var(--border); border-radius: 20px; padding: 5px 14px; margin: 0 8px 8px 0; font-size: 13px; color: var(--fg); cursor: pointer; }
.ex-chip:hover { border-color: var(--accent); color: var(--accent); }

#grid-wrap { overflow: auto; margin: 6px 18px; border: 1px solid var(--border); border-radius: 8px; max-height: 58vh; background: var(--panel); }
#grid { display: grid; font-family: var(--mono); font-size: 11px; width: max-content; }
.cell, .hcell, .lcell {
  padding: 2px 5px; border-right: 1px solid #21262d; border-bottom: 1px solid #21262d;
  white-space: pre; overflow: hidden; text-overflow: ellipsis; max-width: 86px; min-width: 44px;
}
.hcell { position: sticky; top: 0; background: #1c2129; color: var(--hot); z-index: 2; max-height: 90px; }
.hcell .idx { color: var(--dim); font-size: 9px; display: block; }
.lcell { position: sticky; left: 0; background: #1c2129; color: var(--dim); z-index: 1; text-align: right; }
.corner { position: sticky; top: 0; left: 0; z-index: 3; background: #1c2129; }
.cell { cursor: pointer; color: var(--fg); }
.cell:hover { outline: 1px solid var(--accent); }
.outrow { border-top: 2px solid var(--accent); }
.lcell.outrow { color: var(--accent); font-weight: 700; }
.hcell.gen { color: #7ee787; }
.hcell.gen .idx { color: #7ee787; opacity: .75; }
.genb { border-left: 2px solid #7ee787; }

#metrics { display: flex; gap: 14px; padding: 4px 18px 18px; flex-wrap: wrap; }
.metric { flex: 1 1 260px; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.metric h3 { margin: 0 0 4px; font-size: 12px; color: var(--dim); font-weight: 500; }
.metric svg { width: 100%; height: 110px; display: block; }

#tooltip {
  position: fixed; z-index: 10; background: #1c2129; border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 10px; font-family: var(--mono); font-size: 12px;
  pointer-events: none; max-width: 340px; box-shadow: 0 8px 24px rgba(0,0,0,.5);
}
#tooltip table { border-collapse: collapse; }
#tooltip td { padding: 0 8px 0 0; }
#tooltip .p { color: var(--accent); text-align: right; }
#tooltip .meta { color: var(--dim); margin-top: 4px; }