:root {
  color-scheme: light;
  --bg: #fdfdfb; --panel: #f3f3ec; --text: #1a1a1a; --muted: #5a5a52;
  --line: #d8d8cc; --accent: #345c8a; --accent-text: #fff; --error: #a3261b;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 16px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; }
button { font: inherit; cursor: pointer; border: 0; border-radius: 6px;
         padding: .55rem 1.1rem; background: var(--accent); color: var(--accent-text); }
button:disabled { opacity: .5; cursor: default; }
button.link { background: none; color: var(--accent); padding: .3rem .4rem; }
textarea, input { font: inherit; width: 100%; padding: .6rem .7rem; border: 1px solid var(--line);
                  border-radius: 6px; background: #fff; color: var(--text); }
.muted { color: var(--muted); }
.error { color: var(--error); min-height: 1.4em; }

.login-page { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-box { width: 100%; max-width: 22rem; }
.login-box h1 { margin: 0; }
.login-box label { display: block; margin: .8rem 0; }
.login-box button { width: 100%; }

.top { display: flex; align-items: center; gap: 1rem; padding: .6rem 16px;
       border-bottom: 1px solid var(--line); background: var(--panel); }
.top .brand { font-weight: 600; font-size: 1.1rem; }
.top .quota { margin-left: auto; color: var(--muted); font-size: .9rem; }
.top form { margin: 0; }
.history-toggle { display: none; }

.layout { display: grid; grid-template-columns: 17rem 1fr; min-height: calc(100vh - 3.2rem); }
.history { border-right: 1px solid var(--line); padding: 1rem; overflow-y: auto; }
.history h2 { font-size: 1rem; margin: 0 0 .6rem; }
.history ul { list-style: none; margin: 0; padding: 0; }
.history-item { display: block; width: 100%; text-align: left; background: none;
                color: var(--text); padding: .45rem .5rem; border-radius: 6px; font-size: .92rem; }
.history-item:hover, .history-item.active { background: var(--panel); }
.main { padding: 1.2rem 16px 4rem; max-width: 52rem; width: 100%; }
.ask-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem;
           margin-top: .5rem; }

.result { margin-top: 2rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.result h1 { font-size: 1.2rem; line-height: 1.4; }
.status { color: var(--muted); }
.meta { color: var(--muted); font-size: .9rem; margin-top: 1.5rem; }
.answer { font-family: Georgia, 'Times New Roman', serif; font-size: 1.02rem; line-height: 1.65; }
.answer h2 { font-size: 1.1rem; margin-top: 1.6rem; }
.answer sup { font-size: .7em; }
.answer sup a { text-decoration: none; color: var(--accent); cursor: pointer; }
.answer ol.sources li { margin-bottom: .3rem; }
.answer .quote { margin: .6rem 0 1rem 1rem; padding: .5rem .9rem; border-left: 3px solid #8a8a7a;
                 background: var(--panel); font-size: .93rem; }
.answer .quote blockquote { margin: 0; }
.answer .quote blockquote p { margin: 0 0 .4rem; }
.answer .quote-src { margin: .4rem 0 0; color: var(--muted); font-style: italic; }
.answer a { color: var(--accent); overflow-wrap: anywhere; }

[hidden] { display: none !important; }
.feedback { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin-top: 1rem;
            padding: .8rem; background: var(--panel); border-radius: 8px; }
.feedback textarea { flex-basis: 100%; }
.rate { background: #fff; color: var(--text); border: 1px solid var(--line); padding: .3rem .7rem; }
.rate[aria-pressed="true"] { border-color: var(--accent); background: #e4ecf5; }

@media (max-width: 760px) {
  .history-toggle { display: inline-block; }
  .layout { grid-template-columns: 1fr; }
  .history { display: none; border-right: 0; border-bottom: 1px solid var(--line); }
  body.history-open .history { display: block; }
  .top { gap: .5rem; }
}