/* US Census Data Agent — warm, paper-like theme (cream background, terracotta accent, serif reading text). */
:root {
  --bg: #faf9f5;
  --sidebar: #f5f4ed;
  --surface: #ffffff;
  --text: #1f1e1d;
  --muted: #6f6e69;
  --border: #e6e3d8;
  --border-strong: #d9d5c8;
  --hover: #ebe9df;
  --accent: #c96442;
  --accent-hover: #b4573a;
  --accent-soft: #f6e3da;
  --on-accent: #ffffff;
  --user-bg: #efede4;
  --code-bg: #f1efe7;
  --danger: #b3261e;
  --danger-bg: #fbeae7;
  --ok: #4d7c53;
  --warn: #a9741b;
  --shadow: 0 1px 2px rgba(31, 30, 29, 0.04), 0 4px 18px rgba(31, 30, 29, 0.06);
  --radius: 14px;
  --sidebar-w: 280px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-serif: ui-serif, "Tiempos Text", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #262624;
    --sidebar: #1f1e1d;
    --surface: #30302e;
    --text: #ece9e1;
    --muted: #a3a099;
    --border: #3b3a37;
    --border-strong: #4a4945;
    --hover: #343330;
    --accent: #d97757;
    --accent-hover: #e58b6d;
    --accent-soft: #4a352c;
    --on-accent: #1f1e1d;
    --user-bg: #34332f;
    --code-bg: #1f1e1d;
    --danger: #ff8a80;
    --danger-bg: #3a1f1c;
    --ok: #86b58c;
    --warn: #e0b050;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 6px 22px rgba(0, 0, 0, 0.25);
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { font: 15px/1.5 var(--font-sans); background: var(--bg); color: var(--text); -webkit-font-smoothing: antialiased; display: flex; flex-direction: column; }
body > .login, body > .chat { flex: 1; min-height: 0; }

/* quota notice across the top of every screen */
.quota-note { flex: none; padding: 8px 16px; font-size: 13.5px; line-height: 1.4; text-align: center; background: var(--accent-soft); color: var(--text); border-bottom: 1px solid var(--border); }
.quota-note a { color: var(--accent); font-weight: 600; text-decoration: none; }
.quota-note a:hover { text-decoration: underline; }
.quota-icon { color: var(--accent); margin-right: 6px; }
[hidden] { display: none !important; }
button { font: inherit; cursor: pointer; color: inherit; }
.muted { color: var(--muted); }
.error { color: var(--danger); }
.spacer { flex: 1; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* buttons */
.primary { background: var(--accent); color: var(--on-accent); border: 0; border-radius: 10px; padding: 9px 16px; font-weight: 600; }
.primary:hover:not(:disabled) { background: var(--accent-hover); }
.primary:disabled { opacity: 0.45; cursor: not-allowed; }
.secondary { background: transparent; border: 1px solid var(--border-strong); border-radius: 10px; padding: 7px 14px; }
.secondary:hover { background: var(--hover); }
.link { background: none; border: 0; color: var(--muted); padding: 4px 8px; border-radius: 8px; }
.link:hover { background: var(--hover); color: var(--text); }
.icon-btn { background: none; border: 0; font-size: 20px; padding: 4px 8px; border-radius: 8px; }
.icon-btn:hover { background: var(--hover); }
.brand-mark { color: var(--accent); font-family: var(--font-serif); font-size: 22px; line-height: 1; }

/* login */
.login { display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 400px; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 32px; display: grid; gap: 8px; box-shadow: var(--shadow); }
.login-card .brand-mark { font-size: 34px; }
.login-card h1 { margin: 4px 0 0; font: 500 28px/1.2 var(--font-serif); letter-spacing: -0.01em; }
.login-card label { font-size: 13px; color: var(--muted); margin-top: 10px; }
.login-card input { padding: 11px 13px; border: 1px solid var(--border-strong); border-radius: 10px; background: var(--bg); color: var(--text); font: inherit; }
.login-card input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.login-card button { margin-top: 18px; padding: 11px 16px; }
.login-card .error { margin: 6px 0 0; font-size: 14px; }

/* layout */
.chat { display: grid; grid-template-columns: var(--sidebar-w) 1fr; }
.sidebar { background: var(--sidebar); border-right: 1px solid var(--border); display: flex; flex-direction: column; min-height: 0; padding: 14px 10px; gap: 10px; }
.new-chat { width: 100%; display: flex; align-items: center; justify-content: center; gap: 6px; }
.conversation-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 2px; }
.conv { text-align: left; background: none; border: 0; border-radius: 9px; padding: 8px 10px; width: 100%; }
.conv:hover { background: var(--hover); }
.conv.active { background: var(--hover); font-weight: 600; box-shadow: inset 2px 0 0 var(--accent); }
.conv .title { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.conv .when { display: block; font-size: 12px; color: var(--muted); font-weight: 400; }
.empty { text-align: center; padding: 16px 8px; font-size: 14px; }
.main { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); }
.topbar { display: flex; align-items: center; gap: 10px; padding: 10px 18px; border-bottom: 1px solid var(--border); background: var(--bg); }
.topbar h2 { margin: 0; font: 500 18px/1 var(--font-serif); }
.menu { display: none; }
.usage { font-size: 13px; color: var(--muted); }
.banner { background: var(--danger-bg); color: var(--danger); padding: 10px 18px; border-bottom: 1px solid var(--border); font-weight: 600; }
.scrim { display: none; }

/* thread */
.thread { flex: 1; overflow-y: auto; padding: 24px 18px 8px; }
.thread-inner { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 26px; }
.welcome { max-width: 600px; margin: 9vh auto 0; text-align: center; }
.welcome .brand-mark { font-size: 40px; }
.welcome h3 { margin: 8px 0 6px; font: 500 30px/1.2 var(--font-serif); letter-spacing: -0.01em; }
.examples { display: grid; gap: 10px; margin-top: 22px; }
.example { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; text-align: left; font-size: 14px; }
.example:hover { border-color: var(--accent); background: var(--accent-soft); }
.msg { display: flex; }
.msg.user { justify-content: flex-end; }
.msg.user .bubble { background: var(--user-bg); border-radius: 18px; padding: 10px 16px; max-width: 85%; white-space: pre-wrap; overflow-wrap: anywhere; }
/* assistant replies are flat (no bubble), set in a serif like a document */
.msg.assistant { gap: 12px; align-items: flex-start; }
.msg.assistant::before { content: "✻"; color: var(--accent); font-family: var(--font-serif); font-size: 20px; line-height: 1.5; flex: none; }
.msg.assistant .bubble { flex: 1; min-width: 0; padding: 0; overflow-wrap: anywhere; }
.md { font-family: var(--font-serif); font-size: 16.5px; line-height: 1.68; }
.md > :first-child { margin-top: 0; } .md > :last-child { margin-bottom: 0; }
.md p { margin: 0.65em 0; } .md ul, .md ol { padding-left: 1.4em; }
.md h1, .md h2, .md h3 { font-family: var(--font-serif); font-weight: 600; line-height: 1.3; }
.md a { color: var(--accent); }
.md strong { font-weight: 600; }
.md code { background: var(--code-bg); padding: 1px 6px; border-radius: 6px; font: 0.88em var(--font-mono); }
.md pre { background: var(--code-bg); padding: 12px 14px; border-radius: 10px; overflow-x: auto; font-family: var(--font-mono); }
.md blockquote { margin: 0.8em 0; padding-left: 14px; border-left: 3px solid var(--border-strong); color: var(--muted); }
.status { color: var(--muted); font-size: 13.5px; margin-top: 6px; }
.status::after { content: ""; display: inline-block; width: 1.2em; text-align: left; animation: dots 1.2s steps(4, end) infinite; }
@keyframes dots { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; } 75% { content: "..."; } }

/* activity: skills loaded, queries run, latency */
.activity { margin: 2px 0 12px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); font-family: var(--font-sans); font-size: 13.5px; }
.activity > summary { cursor: pointer; padding: 8px 12px; color: var(--muted); list-style: none; display: flex; align-items: center; gap: 8px; user-select: none; }
.activity > summary::-webkit-details-marker { display: none; }
.activity > summary::before { content: ""; width: 0; height: 0; border-left: 5px solid currentColor; border-top: 4px solid transparent; border-bottom: 4px solid transparent; transition: transform 0.15s; }
.activity[open] > summary::before { transform: rotate(90deg); }
.activity > summary:hover { color: var(--text); }
.steps { list-style: none; margin: 0; padding: 2px 12px 10px; display: grid; gap: 9px; }
.step { display: grid; grid-template-columns: 18px 1fr auto; gap: 10px; align-items: start; }
.step-icon { width: 14px; height: 14px; margin-top: 3px; border-radius: 50%; border: 2px solid var(--border-strong); }
.step[data-state="running"] .step-icon { border-color: var(--accent-soft); border-top-color: var(--accent); animation: spin 0.8s linear infinite; }
.step[data-state="done"] .step-icon { border-color: var(--ok); background: radial-gradient(circle, var(--ok) 38%, transparent 42%); }
.step[data-state="error"] .step-icon { border-color: var(--danger); background: radial-gradient(circle, var(--danger) 38%, transparent 42%); }
.step[data-state="stopped"] .step-icon { border-style: dashed; }
@keyframes spin { to { transform: rotate(360deg); } }
.step-title { font-weight: 600; }
.step.skill .step-title::before { content: "◈ "; color: var(--accent); font-weight: 400; }
.step.query .step-title::before { content: "⛁ "; color: var(--accent); font-weight: 400; }
.step-detail { color: var(--muted); font-size: 13px; margin-top: 1px; overflow-wrap: anywhere; }
.step[data-state="error"] .step-detail { color: var(--danger); }
.step-latency { font: 12.5px var(--font-mono); color: var(--muted); white-space: nowrap; padding-top: 2px; }
.step-sql { margin-top: 5px; }
.step-sql > summary { cursor: pointer; color: var(--muted); font-size: 12.5px; }
.step-sql pre { margin: 5px 0 0; background: var(--code-bg); padding: 9px 11px; border-radius: 9px; overflow-x: auto; font: 12.5px/1.5 var(--font-mono); white-space: pre-wrap; color: var(--text); }

/* thumbs up / down under an answer */
.feedback { margin-top: 10px; font-family: var(--font-sans); }
.fb-row { display: flex; align-items: center; gap: 4px; }
.fb-btn { width: 30px; height: 30px; display: grid; place-items: center; border: 0; border-radius: 8px; background: none; color: var(--muted); }
.fb-btn:hover { background: var(--hover); color: var(--text); }
.fb-btn[aria-pressed="true"] { color: var(--accent); background: var(--accent-soft); }
.fb-btn[aria-pressed="true"] svg { fill: currentColor; fill-opacity: 0.25; }
.fb-note { margin-left: 8px; font-size: 12.5px; color: var(--muted); }
.fb-note.error { color: var(--danger); }
.fb-comment { display: flex; gap: 8px; margin-top: 8px; max-width: 520px; }
.fb-input { flex: 1; padding: 7px 10px; border: 1px solid var(--border-strong); border-radius: 10px; background: var(--surface); color: var(--text); font: 14px var(--font-sans); }
.fb-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.step.critique .step-title::before { content: "✓ "; color: var(--accent); font-weight: 400; }
.step.critique[data-state="error"] .step-detail { color: var(--warn); }
.validation { margin-top: 10px; font-family: var(--font-sans); font-size: 13.5px; }
.validation > summary { cursor: pointer; display: inline-flex; align-items: center; gap: 8px; color: var(--muted); list-style: none; }
.validation > summary::-webkit-details-marker { display: none; }
.val-chip { padding: 2px 10px; border-radius: 999px; font-weight: 600; border: 1px solid currentColor; }
.validation.high .val-chip { color: var(--ok); }
.validation.medium .val-chip { color: var(--warn); }
.validation.low .val-chip { color: var(--danger); }
.val-body { margin-top: 8px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); max-width: 720px; }
.val-body p { margin: 0 0 8px; }
.val-label { color: var(--muted); font-size: 12.5px; margin-top: 8px; }
.val-body pre { margin: 4px 0 0; background: var(--code-bg); padding: 9px 11px; border-radius: 9px; overflow-x: auto; font: 12.5px/1.5 var(--font-mono); white-space: pre-wrap; }
.val-body ul { margin: 4px 0 0 18px; padding: 0; }
.fb-send { padding: 6px 14px; }

.chart-card { margin: 14px 0; padding: 10px; border: 1px solid var(--border); border-radius: 12px; background: #ffffff; font-family: var(--font-sans); max-width: 760px; }
.chart-card img { display: block; width: 100%; height: auto; border-radius: 6px; }
.chart-card figcaption { margin-top: 6px; font-size: 12.5px; color: #6f6e69; }
.step.chart .step-title::before { content: "▤ "; color: var(--accent); font-weight: 400; }
.artifact { border: 1px solid var(--border); border-radius: 12px; margin: 14px 0; overflow: hidden; background: var(--surface); font-family: var(--font-sans); }
.artifact .atitle { padding: 9px 14px; font-weight: 600; font-size: 14px; border-bottom: 1px solid var(--border); background: var(--sidebar); }
.artifact iframe { display: block; width: 100%; border: 0; height: 120px; background: transparent; color-scheme: light dark; }
details.receipt { margin-top: 10px; font: 13px var(--font-sans); color: var(--muted); }
details.receipt summary { cursor: pointer; }
.query { margin: 8px 0; }
.query pre { background: var(--code-bg); padding: 8px 10px; border-radius: 9px; overflow-x: auto; margin: 4px 0; color: var(--text); white-space: pre-wrap; font-family: var(--font-mono); }
.error-note { margin-top: 10px; padding: 9px 13px; border-radius: 10px; background: var(--danger-bg); color: var(--danger); font: 14px var(--font-sans); display: flex; gap: 12px; align-items: center; }
.error-note button { margin-left: auto; }

/* composer: a rounded card with a round send button */
.composer { display: flex; gap: 8px; align-items: flex-end; margin: 6px auto 18px; padding: 8px 8px 8px 16px; width: calc(100% - 36px); max-width: 760px; position: relative; background: var(--surface); border: 1px solid var(--border-strong); border-radius: 22px; box-shadow: var(--shadow); }
.composer:focus-within { border-color: var(--accent); }
.composer textarea { flex: 1; resize: none; max-height: 9em; padding: 7px 2px; border: 0; outline: none; background: transparent; color: var(--text); font: 16px/1.5 var(--font-sans); }
.composer .primary { width: 36px; height: 36px; padding: 0; border-radius: 50%; font-size: 18px; line-height: 1; display: grid; place-items: center; flex: none; }
.composer .secondary { width: 36px; height: 36px; padding: 0; border-radius: 50%; display: grid; place-items: center; flex: none; }
.counter { position: absolute; right: 54px; top: -20px; font-size: 12px; color: var(--muted); }

@media (max-width: 767px) {
  .chat { grid-template-columns: 1fr; }
  .sidebar { position: fixed; inset: 0 auto 0 0; width: min(82vw, 300px); transform: translateX(-100%); transition: transform 0.2s; z-index: 20; }
  .chat.menu-open .sidebar { transform: none; }
  .chat.menu-open .scrim { display: block; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.4); z-index: 10; }
  .menu { display: inline-block; }
  .msg.assistant::before { display: none; }
}