:root {
  --paper: #F3F6F4;
  --surface: #FFFFFF;
  --ink: #10243A;
  --ink-2: #4A5D6B;
  --ink-3: #7B8B95;
  --line: #D8E1DD;
  --line-2: #E8EEEB;
  --teal: #0F8B8D;
  --teal-ink: #0A6466;
  --teal-wash: #E3F2F1;
  --amber: #A86A12;
  --amber-wash: #FBF1E0;
  --danger: #B3261E;
  --board: #10243A;
  --board-ink: #DCE8EA;
  --board-dim: #8FA6B0;
  --code-bg: #F0F4F3;
  --shadow: 0 1px 0 rgba(16, 36, 58, .04), 0 8px 24px -12px rgba(16, 36, 58, .18);
  --radius-l: 18px;
  --radius-m: 12px;
  --radius-s: 8px;
  --font: 'Onest', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --display: 'Unbounded', 'Onest', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0C1821; --surface: #12222E; --ink: #E4EDEF; --ink-2: #A9BAC2; --ink-3: #7F939D;
    --line: #22394A; --line-2: #1A2E3C; --teal: #3CC0BC; --teal-ink: #7AD9D5; --teal-wash: #12343A;
    --amber: #E3A646; --amber-wash: #2E2412; --danger: #FF8A80; --board: #07121A; --board-ink: #DCE8EA;
    --board-dim: #7D96A1; --code-bg: #0E1C26; --shadow: 0 1px 0 rgba(0,0,0,.2), 0 10px 30px -14px rgba(0,0,0,.6);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0C1821; --surface: #12222E; --ink: #E4EDEF; --ink-2: #A9BAC2; --ink-3: #7F939D;
  --line: #22394A; --line-2: #1A2E3C; --teal: #3CC0BC; --teal-ink: #7AD9D5; --teal-wash: #12343A;
  --amber: #E3A646; --amber-wash: #2E2412; --danger: #FF8A80; --board: #07121A; --board-ink: #DCE8EA;
  --board-dim: #7D96A1; --code-bg: #0E1C26; --shadow: 0 1px 0 rgba(0,0,0,.2), 0 10px 30px -14px rgba(0,0,0,.6);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}
button, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* header */
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px clamp(16px, 4vw, 40px);
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.mark {
  width: 34px; height: 34px; border-radius: 10px; flex: none;
  background:
    radial-gradient(circle at 50% 120%, transparent 46%, var(--teal) 47% 62%, transparent 63%),
    var(--teal-wash);
  box-shadow: inset 0 0 0 1.5px var(--teal);
}
.brand-name { font-family: var(--display); font-weight: 700; font-size: 17px; letter-spacing: -.01em; margin: 0; line-height: 1.15; }
.brand-sub { margin: 1px 0 0; font-size: 13px; color: var(--ink-3); }
.top-right { display: flex; align-items: center; gap: 14px; }
.data-state { font-size: 13px; color: var(--ink-3); white-space: nowrap; }
.data-state.ready::before { content: ''; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--teal); margin-right: 7px; vertical-align: 1px; }
.lang { display: inline-flex; padding: 3px; border-radius: 999px; background: var(--surface); box-shadow: inset 0 0 0 1px var(--line); }
.lang button { border: 0; background: transparent; padding: 5px 11px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--ink-2); cursor: pointer; }
.lang button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

/* exchange board — the one moving element */
.board {
  background: var(--board); color: var(--board-ink);
  overflow: hidden; position: relative; height: 46px;
  border-block: 1px solid rgba(255,255,255,.06);
}
.board::before, .board::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 60px; z-index: 2; pointer-events: none;
}
.board::before { left: 0; background: linear-gradient(90deg, var(--board), transparent); }
.board::after { right: 0; background: linear-gradient(-90deg, var(--board), transparent); }
.board-track { display: flex; align-items: center; height: 100%; white-space: nowrap; }
.board-run { display: flex; align-items: center; gap: 0; animation: run 140s linear infinite; }
.board:hover .board-run { animation-play-state: paused; }
@keyframes run { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.tick { display: inline-flex; align-items: baseline; gap: 9px; padding: 0 22px; font-size: 13.5px; border-right: 1px solid rgba(255,255,255,.08); }
.tick .no { color: var(--board-dim); font-size: 12px; }
.tick .prod { max-width: 26ch; overflow: hidden; text-overflow: ellipsis; }
.tick .sum { font-weight: 600; color: #7FE0DB; }
.tick .reg { color: var(--board-dim); font-size: 12px; }
.board-loading { display: flex; align-items: center; gap: 14px; padding: 0 clamp(16px, 4vw, 40px); font-size: 13.5px; color: var(--board-dim); width: 100%; }
.board-loading .bar { width: min(240px, 40vw); height: 4px; background: rgba(255,255,255,.1); border-radius: 4px; overflow: hidden; }
.board-loading .bar span { display: block; height: 100%; width: 0; background: #7FE0DB; transition: width .2s; }
@media (prefers-reduced-motion: reduce) { .board-run { animation: none; } }

/* conversation */
.chat { flex: 1; width: 100%; max-width: 820px; margin: 0 auto; padding: 36px clamp(16px, 4vw, 24px) 24px; }
.intro-title { font-family: var(--display); font-weight: 700; font-size: clamp(28px, 5vw, 44px); line-height: 1.08; letter-spacing: -.025em; margin: 8px 0 14px; max-width: 16ch; }
.intro-text { color: var(--ink-2); max-width: 60ch; margin: 0 0 26px; }
.examples { display: flex; flex-wrap: wrap; gap: 8px; }
.ex {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  padding: 9px 14px; border-radius: 999px; font-size: 14px; cursor: pointer; text-align: left;
  transition: border-color .15s, background .15s;
}
.ex:hover { border-color: var(--teal); background: var(--teal-wash); }
.ex:disabled { opacity: .5; cursor: progress; }

.thread { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 22px; }
.q {
  align-self: flex-end; max-width: 85%;
  background: var(--ink); color: var(--paper);
  padding: 11px 16px; border-radius: var(--radius-l) var(--radius-l) 6px var(--radius-l);
  white-space: pre-wrap; overflow-wrap: anywhere;
}
.a {
  min-width: 0; max-width: 100%;
  background: var(--surface); border-radius: var(--radius-l);
  box-shadow: var(--shadow), inset 0 0 0 1px var(--line-2);
  padding: 18px 20px 14px; position: relative;
}
.a.nodata { background: var(--amber-wash); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--amber) 35%, transparent); }
.a.error { box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--danger) 45%, transparent); }
.a-kind { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 600; color: var(--amber); margin-bottom: 8px; }
.a-kind svg { width: 16px; height: 16px; }
.a-body { overflow-wrap: anywhere; }
.a-body p { margin: 0 0 8px; }
.a-body p:last-child { margin-bottom: 0; }
.a-body strong { font-weight: 700; color: var(--ink); background: linear-gradient(transparent 62%, color-mix(in srgb, var(--teal) 22%, transparent) 62%); padding: 0 1px; }
.a.nodata .a-body strong { background: none; }
.a-body ul { margin: 6px 0 10px; padding-left: 20px; }
.a-body li { margin: 2px 0; }
.a-basis { margin-top: 10px !important; font-size: 14px; color: var(--ink-2); }

.a-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line-2); font-size: 13px; color: var(--ink-3); }
.a.nodata .a-foot { border-top-color: color-mix(in srgb, var(--amber) 22%, transparent); }
.badge { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; }
.badge svg { width: 15px; height: 15px; }
.badge.ok { color: var(--teal-ink); }
.badge.warn { color: var(--amber); }
.evid-toggle {
  margin-left: auto; border: 0; background: transparent; color: var(--teal-ink); font-weight: 600; font-size: 13px;
  cursor: pointer; padding: 4px 2px; display: inline-flex; align-items: center; gap: 6px;
}
.evid-toggle svg { width: 14px; height: 14px; transition: transform .2s; }
.evid-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

.evidence { margin-top: 12px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.evidence[hidden] { display: none; }
.ev-step { min-width: 0; border-radius: var(--radius-m); background: var(--paper); padding: 12px 14px; box-shadow: inset 0 0 0 1px var(--line-2); }
.ev-head { display: flex; justify-content: space-between; gap: 10px; font-size: 13px; color: var(--ink-2); margin-bottom: 8px; }
.ev-head b { color: var(--ink); font-weight: 600; }
.ev-sql { margin: 0 0 10px; padding: 10px 12px; background: var(--code-bg); border-radius: var(--radius-s); font-family: var(--mono); font-size: 12.5px; line-height: 1.55; white-space: pre-wrap; overflow-wrap: anywhere; color: var(--ink); }
.ev-err { color: var(--danger); font-size: 13px; }
.ev-table-wrap { overflow-x: auto; border-radius: var(--radius-s); box-shadow: inset 0 0 0 1px var(--line); }
.ev-table { border-collapse: collapse; font-size: 12.5px; width: 100%; }
.ev-table th, .ev-table td { padding: 6px 10px; text-align: left; border-bottom: 1px solid var(--line-2); white-space: nowrap; max-width: 320px; overflow: hidden; text-overflow: ellipsis; }
.ev-table th { font-weight: 600; color: var(--ink-2); background: var(--surface); position: sticky; top: 0; }
.ev-table td.n { text-align: right; }
.ev-more { font-size: 12.5px; color: var(--ink-3); margin-top: 6px; }

.pending { display: flex; align-items: center; gap: 12px; color: var(--ink-2); font-size: 14.5px; }
.pending .dots { display: inline-flex; gap: 4px; }
.pending .dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); animation: blink 1.2s infinite both; }
.pending .dots i:nth-child(2) { animation-delay: .2s; }
.pending .dots i:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }
.pending-log { margin: 10px 0 0; padding: 0; list-style: none; font-size: 13px; color: var(--ink-3); display: grid; gap: 3px; }
.pending-log li::before { content: '✓ '; color: var(--teal); }

/* composer */
.composer-wrap {
  position: sticky; bottom: 0; z-index: 5;
  background: linear-gradient(to top, var(--paper) 70%, color-mix(in srgb, var(--paper) 0%, transparent));
  padding: 14px clamp(16px, 4vw, 24px) calc(14px + env(safe-area-inset-bottom));
}
.composer {
  max-width: 820px; margin: 0 auto; display: flex; align-items: flex-end; gap: 8px;
  background: var(--surface); border-radius: 20px; padding: 8px 8px 8px 18px;
  box-shadow: var(--shadow), inset 0 0 0 1px var(--line);
}
.composer:focus-within { box-shadow: var(--shadow), inset 0 0 0 1.5px var(--teal); }
.composer textarea {
  flex: 1; border: 0; outline: 0; resize: none; background: transparent; padding: 9px 0;
  max-height: 160px; font-size: 16px; line-height: 1.45;
}
.composer textarea::placeholder { color: var(--ink-3); }
.send {
  border: 0; background: var(--teal); color: #fff; font-weight: 600; padding: 10px 18px; border-radius: 14px; cursor: pointer;
  transition: background .15s, opacity .15s;
}
.send:hover { background: var(--teal-ink); }
.send:disabled { opacity: .45; cursor: not-allowed; }
.composer-note { max-width: 820px; margin: 8px auto 0; font-size: 12.5px; color: var(--ink-3); text-align: center; }

@media (max-width: 560px) {
  .brand-sub, .data-state { display: none; }
  .q { max-width: 92%; }
  .a { padding: 16px 16px 12px; }
  .evid-toggle { margin-left: 0; }
}