/* Light palette on :root, dark swapped under prefers-color-scheme, so the page
   follows the OS without a toggle. */
:root {
  --bg: #f7f7f8;
  --surface: #ffffff;
  --surface-2: #f2f2f4;
  --border: #e3e3e7;
  --border-strong: #d1d1d8;
  --text: #16161a;
  --text-dim: #6b6b76;
  --text-faint: #96969f;
  --accent: #2f6df6;
  --accent-soft: #e8f0ff;
  --ok: #1a7f47;
  --warn: #a4620a;
  --danger: #c02b2b;
  --code-bg: #f4f4f6;
  --shadow: 0 1px 2px rgb(0 0 0 / 6%), 0 8px 24px rgb(0 0 0 / 6%);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a;
    --surface: #1e1e22;
    --surface-2: #26262b;
    --border: #313138;
    --border-strong: #43434c;
    --text: #ececf1;
    --text-dim: #a0a0ab;
    --text-faint: #74747f;
    --accent: #6d9bff;
    --accent-soft: #1e2b47;
    --ok: #4cc98a;
    --warn: #e0a53f;
    --danger: #ff6b6b;
    --code-bg: #16161a;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 35%);
  }
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

button { font: inherit; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }

/* ---------- Login gate ---------- */

.gate {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.gate-card {
  width: min(400px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  box-shadow: var(--shadow);
}

.gate-card h1 { margin: 0 0 8px; font-size: 20px; }
.gate-sub { margin: 0 0 24px; color: var(--text-dim); font-size: 14px; }
.gate-card label { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 6px; }

.gate-card input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--bg);
  margin-bottom: 16px;
}

.gate-card input:focus-visible,
.composer textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.gate-card button {
  width: 100%;
  padding: 10px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.gate-error { color: var(--danger); font-size: 13px; margin: 12px 0 0; }

/* ---------- Layout ---------- */

.app {
  display: grid;
  grid-template-columns: 260px 1fr;
  height: 100dvh;
}

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.sidebar-head { padding: 12px; }

.new-chat {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  text-align: left;
}
.new-chat:hover { background: var(--surface-2); }

.history { flex: 1; overflow-y: auto; padding: 0 8px 8px; min-height: 0; }

.history-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font-size: 13.5px;
  line-height: 1.45;
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.history-item:hover { background: var(--surface-2); }
.history-item.active { background: var(--accent-soft); color: var(--accent); }
.history-meta { display: block; font-size: 11.5px; color: var(--text-faint); }
.history-item.active .history-meta { color: inherit; opacity: .8; }

.sidebar-foot {
  padding: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
}

.ro-badge {
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.link-btn { border: 0; background: none; color: var(--text-dim); padding: 0; }
.link-btn:hover { color: var(--text); }

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.topbar h1 {
  font-size: 15px;
  font-weight: 600;
  margin: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.db-info { font-size: 12px; color: var(--text-faint); font-family: var(--mono); }

.icon-btn {
  display: none;
  border: 0;
  background: none;
  font-size: 18px;
  color: var(--text-dim);
  padding: 0 4px;
}

.thread {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px 8px;
  min-height: 0;
}

.thread > * { max-width: 860px; margin-inline: auto; }

.empty { text-align: center; padding: 64px 16px; color: var(--text-dim); }
.empty h2 { font-size: 19px; color: var(--text); margin: 0 0 10px; }
.empty p { margin: 6px 0; font-size: 14px; }
.empty-note { font-size: 13px; color: var(--text-faint); margin-top: 18px; }

/* ---------- Messages ---------- */

.turn { margin-bottom: 28px; }

.user-msg {
  background: var(--accent-soft);
  color: var(--text);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 16px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.spinner {
  width: 12px;
  height: 12px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2.4s; }
}

details.reasoning {
  margin-bottom: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}
details.reasoning > summary {
  cursor: pointer;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--text-dim);
  list-style: none;
}
details.reasoning > summary::-webkit-details-marker { display: none; }
details.reasoning > summary::before { content: "▸ "; }
details.reasoning[open] > summary::before { content: "▾ "; }
.reasoning-body {
  padding: 0 12px 12px;
  font-size: 13px;
  color: var(--text-dim);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 260px;
  overflow-y: auto;
}

/* ---------- Query cards ---------- */

.query {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  margin-bottom: 14px;
  overflow: hidden;
}

.query-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.query-n {
  font-family: var(--mono);
  font-size: 11px;
  color: #fff;
  background: var(--text-faint);
  border-radius: 4px;
  padding: 1px 6px;
  flex: none;
}
.query-purpose { flex: 1; font-size: 14px; min-width: 160px; }
.query-stat { font-size: 12px; color: var(--text-faint); font-family: var(--mono); }
.query-stat.bad { color: var(--danger); }

.sql-block {
  position: relative;
  background: var(--code-bg);
  border-bottom: 1px solid var(--border);
}
.sql-block pre {
  margin: 0;
  padding: 12px 14px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
}
.sql-block .copy { position: absolute; top: 8px; right: 8px; }

.copy {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-dim);
  border-radius: 6px;
  padding: 3px 9px;
  font-size: 12px;
}
.copy:hover { color: var(--text); }
.copy.copied { color: var(--ok); border-color: var(--ok); }

.table-wrap { overflow-x: auto; max-height: 420px; overflow-y: auto; }

table.result {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
table.result th,
table.result td {
  border-bottom: 1px solid var(--border);
  padding: 6px 12px;
  text-align: left;
  white-space: nowrap;
  max-width: 340px;
  overflow: hidden;
  text-overflow: ellipsis;
}
table.result th {
  position: sticky;
  top: 0;
  background: var(--surface-2);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-dim);
}
table.result td.null { color: var(--text-faint); font-style: italic; }
table.result tbody tr:hover { background: var(--surface-2); }

.query-foot {
  display: flex;
  gap: 8px;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  align-items: center;
}
.query-note { font-size: 12px; color: var(--warn); margin-right: auto; }

.query-error {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--danger);
  font-family: var(--mono);
  overflow-wrap: anywhere;
}

.query-empty { padding: 10px 14px; font-size: 13px; color: var(--text-dim); }
.query.rejected { border-color: var(--danger); }

.schema-op {
  font-size: 12.5px;
  color: var(--text-dim);
  padding: 8px 14px;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  margin-bottom: 10px;
  font-family: var(--mono);
}

/* ---------- Answer ---------- */

.answer {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px 18px 6px;
  margin-bottom: 14px;
  overflow-wrap: anywhere;
}

/* Everything the agent said before its final message is progress narration —
   usually a single line about what it is checking next. Dimmed and
   de-emphasised so the answer itself is what the eye lands on. */
.answer.note {
  background: transparent;
  border: 0;
  border-left: 2px solid var(--border-strong);
  border-radius: 0;
  padding: 0 0 0 12px;
  margin-bottom: 12px;
  color: var(--text-dim);
  font-size: 13.5px;
}
.answer.note p { margin: 4px 0; }

.answer.final { border-color: var(--border-strong); }
.answer > :first-child { margin-top: 12px; }
.answer h1, .answer h2, .answer h3 { font-size: 16px; margin: 20px 0 8px; }
.answer h1 { font-size: 18px; }
.answer p { margin: 10px 0; }
.answer ul, .answer ol { padding-left: 22px; margin: 10px 0; }
.answer li { margin: 4px 0; }
.answer code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 4px;
}
.answer pre {
  background: var(--code-bg);
  padding: 12px 14px;
  border-radius: 8px;
  overflow-x: auto;
}
.answer pre code { background: none; padding: 0; }
.answer table {
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 13.5px;
  display: block;
  overflow-x: auto;
  max-width: 100%;
}
.answer th, .answer td { border: 1px solid var(--border); padding: 5px 10px; text-align: left; }
.answer th { background: var(--surface-2); }
.answer blockquote {
  margin: 12px 0;
  padding-left: 12px;
  border-left: 3px solid var(--border-strong);
  color: var(--text-dim);
}
.answer a { color: var(--accent); }

.answer-foot { display: flex; gap: 8px; padding: 0 0 4px; }

.error-box {
  border: 1px solid var(--danger);
  background: color-mix(in srgb, var(--danger) 8%, transparent);
  color: var(--danger);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 13.5px;
  overflow-wrap: anywhere;
}

.notice {
  font-size: 12.5px;
  color: var(--warn);
  padding: 6px 0;
}

/* ---------- Composer ---------- */

.composer {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  padding: 12px 20px 18px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.composer > * { max-width: none; }

.composer textarea {
  flex: 1;
  resize: none;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--bg);
  max-height: 200px;
  line-height: 1.5;
  font-family: inherit;
}

.composer button {
  border: 0;
  border-radius: 10px;
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  flex: none;
}
.composer button:disabled { opacity: .5; cursor: not-allowed; }
.composer .stop { background: var(--danger); }

/* Centre the composer content on wide screens to match the thread column. */
@media (min-width: 900px) {
  .composer { padding-inline: calc(50% - 430px); }
}

/* ---------- Small screens ---------- */

@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 260px;
    z-index: 20;
    transform: translateX(-100%);
    transition: transform .18s ease;
    box-shadow: var(--shadow);
  }
  .sidebar.open { transform: none; }
  .icon-btn { display: block; }
  .db-info { display: none; }
  .thread { padding-inline: 14px; }
  .composer { padding-inline: 14px; }
}