:root {
  --paper: #fbfaf7;
  --ink: #1d222b;
  --dim: #6b7280;
  --line: #e4e1da;
  --accent: #3b5bdb;
  --refusal: #8a6d3b;
  --learned: #3b5bdb;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 15.5px/1.6 var(--sans);
}
a { color: var(--accent); text-decoration: none; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 22px; }

/* header */
.top { border-bottom: 1px solid var(--line); background: var(--paper); }
.bar { display: flex; align-items: baseline; gap: 14px; padding: 14px 22px; }
.brand { display: flex; align-items: baseline; gap: 10px; }
.wordmark { font-family: var(--serif); font-size: 22px; letter-spacing: .04em; }
.tagline { color: var(--dim); font-size: 13.5px; }
.back { margin-left: auto; font-size: 13.5px; }
.panel-btn { display: none; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 6px 12px; font: inherit; cursor: pointer; }
.disclaimer { border-bottom: 1px solid var(--line); color: var(--dim); font-size: 13px; padding: 8px 0; }

/* layout */
.layout { display: grid; grid-template-columns: 1fr 380px; gap: 26px; padding-top: 22px; }
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .side { display: none; position: fixed; inset: 64px 0 0 0; background: var(--paper); overflow: auto; z-index: 20; padding: 16px 18px 40px; }
  .side.open { display: block; }
  .panel-btn { display: inline-block; margin-left: 10px; }
  .back { margin-left: auto; }
}

/* chat */
.chat { display: flex; flex-direction: column; min-height: 70vh; }
.messages { flex: 1; display: flex; flex-direction: column; gap: 16px; padding: 6px 0 18px; }
.empty { color: var(--dim); font-size: 14.5px; padding: 8px 0; }
.empty-title { font-family: var(--serif); font-size: 16px; color: var(--ink); margin: 0 0 10px; }
.empty-note { margin-top: 14px; }
.ex { display: block; text-align: left; background: none; border: 1px dashed var(--line); border-radius: 8px; padding: 8px 12px; margin: 6px 0; font: inherit; color: var(--ink); cursor: pointer; }
.ex:hover { border-color: var(--accent); }
.msg { display: flex; flex-direction: column; }
.msg.user { align-items: flex-end; }
.bubble { max-width: 92%; padding: 12px 15px; border-radius: 10px; white-space: pre-wrap; word-wrap: break-word; }
.user .bubble { background: #f1efe8; }
.assistant .bubble { background: #fff; border: 1px solid var(--line); }
.assistant.refusal .bubble { border-left: 3px solid var(--refusal); }
.tagline-tag { display: block; font-size: 12px; font-style: italic; color: var(--dim); margin-bottom: 6px; }
.final-note { font-size: 11.5px; font-style: italic; color: var(--dim); margin-top: 8px; opacity: 0.85; }
.msg-tools { display: flex; gap: 14px; margin-top: 6px; font-size: 12.5px; }
.msg-tools button { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; padding: 0; }
.thought { margin-top: 8px; border-top: 1px dashed var(--line); padding-top: 8px; display: none; }
.thought.open { display: block; }
.thought-label { font-size: 12px; color: var(--dim); margin-bottom: 4px; }
.thought-text { font-size: 13px; color: #444a55; background: #f7f6f2; border-radius: 6px; padding: 8px 10px; white-space: pre-wrap; }
.system { text-align: center; font-style: italic; color: var(--dim); font-size: 13px; }

/* composer */
.composer { border-top: 1px solid var(--line); padding: 12px 0 20px; position: sticky; bottom: 0; background: var(--paper); }
.textarea-wrap { position: relative; }
textarea { width: 100%; resize: none; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px 26px; font: inherit; background: #fff; color: var(--ink); }
textarea:focus { outline: none; border-color: var(--accent); }
.counter { position: absolute; right: 10px; bottom: 8px; font-size: 11.5px; color: var(--dim); }
.counter.hot { color: #b3392b; }
.composer-row { display: flex; align-items: center; gap: 12px; margin-top: 8px; }
.hint { color: var(--dim); font-size: 12px; }
.send { margin-left: auto; background: var(--ink); color: #fff; border: none; border-radius: 8px; padding: 9px 22px; font: inherit; cursor: pointer; }
.send:disabled { opacity: .45; cursor: default; }
.inline-error { color: #b3392b; font-size: 13px; margin-top: 6px; }

/* side panels */
.side { display: flex; flex-direction: column; gap: 14px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.panel-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 8px; }
.panel-head h3 { margin: 0; font-family: var(--serif); font-size: 15.5px; font-weight: 600; }
.linkbtn { background: none; border: none; color: var(--accent); font-size: 12.5px; cursor: pointer; padding: 0; }
.pill { background: #f1efe8; border-radius: 20px; padding: 2px 9px; font-size: 11.5px; color: var(--dim); }
.kv { margin: 0; }
.kv div { display: flex; justify-content: space-between; padding: 3px 0; font-size: 13.5px; }
.kv dt { color: var(--dim); margin: 0; }
.kv dd { margin: 0; font-variant-numeric: tabular-nums; }
.self summary { cursor: pointer; font-size: 13px; color: var(--dim); }
.self pre { white-space: pre-wrap; font-family: var(--sans); font-size: 12.5px; color: #444a55; background: #f7f6f2; border-radius: 6px; padding: 10px; max-height: 220px; overflow: auto; }
.cards { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.card { border-left: 3px solid #cfcbc0; padding: 6px 10px; background: #fbfaf7; border-radius: 4px; }
.card.learned { border-left-color: var(--learned); }
.card .name { font-size: 12px; color: var(--dim); }
.card .sum { font-size: 13px; }
.panel-note { color: var(--dim); font-size: 12px; margin: 10px 0 0; }
.export-row { display: flex; gap: 8px; margin-top: 10px; }
.ghostbtn { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 6px 10px; font: inherit; font-size: 12.5px; color: var(--ink); cursor: pointer; }
.ghostbtn:hover { border-color: var(--accent); }
.cards-head { margin: 12px 0 2px; font-size: 11px; letter-spacing: .05em; text-transform: uppercase; color: var(--dim); }
.positions { display: flex; flex-direction: column; gap: 8px; }
.pos { border-left: 3px solid #cfcbc0; padding: 6px 10px; background: #fbfaf7; border-radius: 4px; font-size: 13px; }
.pos .meta { font-size: 11.5px; color: var(--dim); }
.record { font-size: 13px; }
.record table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.record td { padding: 4px 0; vertical-align: top; border-bottom: 1px solid #f0eee8; word-break: break-word; white-space: pre-line; }
.record td:first-child { color: var(--dim); width: 38%; padding-right: 10px; }
.record .raw summary { margin-top: 10px; cursor: pointer; color: var(--dim); font-size: 12.5px; }
.record pre { white-space: pre-wrap; font-size: 11.5px; background: #f7f6f2; border-radius: 6px; padding: 8px; max-height: 260px; overflow: auto; }

/* footer */
.foot { border-top: 1px solid var(--line); margin-top: 30px; padding: 18px 22px 28px; color: var(--dim); font-size: 13px; }
.foot-links { display: block; margin-top: 6px; }