:root {
  --bg: #0b0f14;
  --bg2: #11161d;
  --bg3: #171e27;
  --line: #232c38;
  --text: #d7dee8;
  --muted: #8b98a9;
  --accent: #5eead4;
  --accent2: #a78bfa;
  --warn: #fbbf24;
  --no: #f87171;
  --partial: #fbbf24;
  --yes: #34d399;
  font-size: 15px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.55;
}
header {
  padding: 20px 28px 0;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg2), var(--bg));
}
.brand { display: flex; gap: 14px; align-items: center; }
.mark { font-size: 26px; color: var(--accent); }
h1 { margin: 0; font-size: 22px; letter-spacing: .3px; }
.sub { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
nav { display: flex; gap: 4px; margin-top: 16px; flex-wrap: wrap; }
nav button {
  background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--muted); font: inherit; padding: 8px 14px; cursor: pointer;
}
nav button:hover { color: var(--text); }
nav button.active { color: var(--accent); border-bottom-color: var(--accent); }
main { padding: 22px 28px 40px; max-width: 1500px; }
.tab { display: none; }
.tab.active { display: block; }
footer {
  padding: 14px 28px 22px; color: var(--muted); font-size: 12px;
  border-top: 1px solid var(--line);
}
code { background: var(--bg3); padding: 1px 5px; border-radius: 4px; font-size: .92em; }

/* ---------- prompts tab ---------- */
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.pickers { display: flex; gap: 10px; align-items: center; }
.pickers label { color: var(--muted); font-size: 13px; display: flex; gap: 6px; align-items: center; }
select, button#swap {
  background: var(--bg3); color: var(--text); border: 1px solid var(--line);
  border-radius: 6px; padding: 6px 10px; font: inherit; cursor: pointer;
}
button#swap:hover { border-color: var(--accent); }
.hint { color: var(--muted); font-size: 12px; max-width: 520px; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 1100px) { .compare { grid-template-columns: 1fr; } }
.pane {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 10px;
  padding: 0 0 10px; overflow: hidden;
}
.pane header {
  padding: 12px 16px; margin: 0; border-bottom: 1px solid var(--line);
  background: var(--bg3); display: block;
}
.pane h3 { margin: 0; font-size: 16px; }
.pane .meta { color: var(--muted); font-size: 12px; margin-top: 2px; }
.pane .tag {
  display: inline-block; font-size: 11px; padding: 1px 8px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted); margin-left: 8px; vertical-align: 1px;
}
.pane .tag.verbatim { color: var(--yes); border-color: var(--yes); }
.pane .tag.reconstructed { color: var(--warn); border-color: var(--warn); }
.pane .summary { padding: 10px 16px 0; color: var(--muted); font-size: 13px; }
.pane .structure { padding: 6px 16px 4px; font-size: 12.5px; color: var(--muted); }
.pane .structure li { margin: 2px 0; }
.pane pre {
  margin: 10px 16px 4px; padding: 14px; background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px;
  font-family: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px; line-height: 1.5; white-space: pre-wrap; word-break: break-word;
  max-height: 620px; overflow: auto;
}
.history { margin-top: 26px; }
.history h2 { font-size: 16px; color: var(--accent); }

/* ---------- tables ---------- */
table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
.striped th, .striped td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.striped th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
.striped tr:hover td { background: var(--bg2); }
.mono { font-family: ui-monospace, Menlo, monospace; font-size: 12.5px; }

/* ---------- feature matrix ---------- */
.matrix-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
.matrix { min-width: 980px; }
.matrix td:first-child { color: var(--text); min-width: 300px; }
.matrix .col-h { position: sticky; top: 0; background: var(--bg3); }
.matrix td:not(:first-child) { text-align: center; width: 90px; }
.matrix td.hi { background: rgba(94, 234, 212, 0.07); }
.yes { color: var(--yes); } .no { color: var(--no); } .partial { color: var(--partial); }
.legend { margin: 10px 2px; color: var(--muted); font-size: 12px; display: flex; gap: 18px; }

/* ---------- gaps / delimiter ---------- */
.gap-col h2 { font-size: 17px; margin: 0 0 12px; }
.gap-col { margin-bottom: 30px; }
.gap-col.mariana h2 { color: var(--yes); }
.gap-col.others h2 { color: var(--warn); }
.gap-col td:first-child { font-weight: 600; width: 230px; }
.gap-col td:nth-child(2) { color: var(--accent2); width: 230px; font-size: 12.5px; }
.delimiter-intro { color: var(--muted); max-width: 900px; margin-bottom: 18px; }
.delimiter td:first-child { font-weight: 600; width: 280px; }
.section-title { font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); margin: 26px 0 10px; }