:root {
  color-scheme: light;
  --ink: #17211b;
  --muted: #607066;
  --paper: #f4f3ec;
  --surface: #fffef9;
  --line: #d9ddd6;
  --green: #176b4d;
  --green-dark: #0f4e38;
  --green-soft: #e4f2ea;
  --amber: #9a5a08;
  --amber-soft: #fff4d9;
  --red: #9b2c2c;
  --red-soft: #fdeaea;
  --shadow: 0 20px 60px rgba(34, 51, 40, 0.09);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% -10%, rgba(63, 137, 103, 0.16), transparent 34rem),
    linear-gradient(180deg, #fbfaf5 0%, var(--paper) 100%);
}

button, input, select, textarea { font: inherit; }
button { color: inherit; }

.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }

.topbar {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid rgba(23, 33, 27, 0.1);
}

.brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  color: white;
  background: var(--green-dark);
  font-family: Georgia, serif;
  font-weight: 700;
  letter-spacing: -0.04em;
}
.brand strong, .brand small { display: block; }
.brand strong { font-size: 1rem; letter-spacing: 0.01em; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 0.76rem; }

.health { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 0.82rem; }
.health-dot { width: 9px; height: 9px; border-radius: 50%; background: #a0aaa3; box-shadow: 0 0 0 4px rgba(160, 170, 163, 0.14); }
.health-ok .health-dot { background: #239666; box-shadow: 0 0 0 4px rgba(35, 150, 102, 0.14); }
.health-error .health-dot { background: #c4553e; box-shadow: 0 0 0 4px rgba(196, 85, 62, 0.14); }

.hero { max-width: 780px; padding: 64px 0 38px; }
.eyebrow { margin: 0 0 12px; color: var(--green); font-size: 0.77rem; font-weight: 750; letter-spacing: 0.14em; text-transform: uppercase; }
h1 { max-width: 720px; margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.25rem, 5vw, 4.25rem); font-weight: 500; line-height: 1.02; letter-spacing: -0.035em; }
.hero > p:last-child { max-width: 660px; margin: 22px 0 0; color: var(--muted); font-size: 1.04rem; line-height: 1.65; }

.workspace { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 22px; align-items: start; padding-bottom: 64px; }
.settings, .chat { border: 1px solid var(--line); border-radius: 18px; background: rgba(255, 254, 249, 0.94); box-shadow: var(--shadow); }
.settings { padding: 18px; position: sticky; top: 18px; }
.settings-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.settings h2 { margin: 0; font-size: 0.94rem; }
.settings label:not(.check-row) { display: block; margin: 15px 0 6px; color: var(--muted); font-size: 0.74rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; }
.settings input[type="password"], .settings input[type="text"], .settings select {
  width: 100%; min-width: 0; padding: 10px 11px; border: 1px solid var(--line); border-radius: 9px; color: var(--ink); background: white;
}
.key-row { display: flex; gap: 6px; }
.key-row input { flex: 1; }
.check-row { display: flex; align-items: center; gap: 8px; margin-top: 9px; color: var(--muted); font-size: 0.78rem; cursor: pointer; }
.check-row input { accent-color: var(--green); }
.icon-button { display: none; border: 0; background: transparent; cursor: pointer; }
.privacy-note { display: grid; gap: 5px; margin-top: 20px; padding: 12px; border-radius: 10px; color: #6f541b; background: var(--amber-soft); font-size: 0.76rem; line-height: 1.45; }

.chat { min-height: 580px; overflow: hidden; }
.empty-state { display: grid; justify-items: center; padding: 58px 32px 42px; text-align: center; }
.empty-icon { display: grid; width: 52px; height: 52px; place-items: center; margin-bottom: 18px; border: 1px solid #bed3c6; border-radius: 16px; color: var(--green-dark); background: var(--green-soft); font-family: Georgia, serif; font-size: 1.6rem; }
.empty-state h2 { margin: 0; font-family: Georgia, serif; font-size: 1.55rem; font-weight: 500; }
.empty-state p { max-width: 540px; margin: 10px 0 22px; color: var(--muted); line-height: 1.55; }
.suggestions { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.suggestions button { padding: 9px 12px; border: 1px solid var(--line); border-radius: 999px; background: white; cursor: pointer; transition: border-color 0.15s, transform 0.15s; }
.suggestions button:hover { border-color: var(--green); transform: translateY(-1px); }

.messages { display: flex; flex-direction: column; gap: 20px; padding: 30px 28px 8px; }
.message { display: grid; gap: 8px; }
.message-label { color: var(--muted); font-size: 0.72rem; font-weight: 750; letter-spacing: 0.08em; text-transform: uppercase; }
.message-user { align-self: end; width: min(82%, 680px); }
.message-user .message-body { padding: 13px 16px; border-radius: 16px 16px 4px 16px; color: white; background: var(--green-dark); white-space: pre-wrap; line-height: 1.55; }
.message-agent .message-body { padding: 18px; border: 1px solid var(--line); border-radius: 4px 16px 16px 16px; background: white; }
.message-agent.is-refused .message-body { border-color: #e2c377; background: #fffbef; }
.message-agent.is-uncertain .message-body, .message-error .message-body { border-color: #e4aaaa; background: var(--red-soft); }
.answer-text { white-space: pre-wrap; line-height: 1.68; overflow-wrap: anywhere; }
.status-line { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-bottom: 14px; }
.badge { display: inline-flex; align-items: center; min-height: 24px; padding: 3px 8px; border-radius: 999px; color: var(--green-dark); background: var(--green-soft); font-size: 0.72rem; font-weight: 750; }
.badge-warning { color: #7b4c0b; background: var(--amber-soft); }
.badge-error { color: var(--red); background: var(--red-soft); }
.answer-meta { margin-top: 14px; color: var(--muted); font-size: 0.72rem; }

.source-panel, .technical-panel { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 13px; }
details summary { color: var(--green-dark); font-size: 0.83rem; font-weight: 700; cursor: pointer; }
.source-list { display: grid; gap: 8px; margin-top: 10px; }
.source-card { padding: 10px 11px; border-radius: 9px; background: #f5f7f3; }
.source-id { color: var(--green-dark); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 0.75rem; font-weight: 800; }
.source-title { margin-top: 3px; font-size: 0.83rem; font-weight: 650; }
.source-meta { margin-top: 3px; color: var(--muted); font-size: 0.72rem; }
.conflict-box { margin-top: 14px; padding: 12px; border-left: 3px solid #d58a18; border-radius: 7px; background: var(--amber-soft); }
.conflict-box strong { display: block; margin-bottom: 5px; color: #744606; font-size: 0.78rem; }
.conflict-box p { margin: 0; color: #664d23; font-size: 0.82rem; line-height: 1.5; }
.follow-up { margin-top: 14px; padding: 12px; border-radius: 9px; background: var(--green-soft); }
.follow-up p { margin: 0 0 8px; font-size: 0.84rem; }
.query-list { margin: 8px 0 0; padding-left: 20px; color: var(--muted); font-size: 0.76rem; line-height: 1.5; }
.rating-panel { display: grid; gap: 9px; margin-top: 16px; padding: 13px; border: 1px solid var(--line); border-radius: 10px; background: #fafbf8; }
.rating-panel > strong { font-size: 0.8rem; }
.rating-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.rating-choice.is-selected { border-color: var(--green); color: var(--green-dark); background: var(--green-soft); }
.rating-status, .comment-status { color: var(--muted); font-size: 0.72rem; }
.comment-form { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: end; padding-top: 10px; border-top: 1px solid var(--line); }
.comment-input { width: 100%; min-height: 72px; resize: vertical; padding: 9px; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); background: white; }
.comment-status { grid-column: 1 / -1; }

.loading-row { display: flex; align-items: center; gap: 10px; color: var(--muted); }
.loader { width: 18px; height: 18px; border: 2px solid #cbd3cd; border-top-color: var(--green); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.composer { margin: 22px 20px 0; padding: 12px; border: 1px solid #cbd2cc; border-radius: 14px; background: white; box-shadow: 0 8px 30px rgba(38, 52, 43, 0.07); }
.composer:focus-within { border-color: var(--green); box-shadow: 0 0 0 3px rgba(23, 107, 77, 0.1); }
.composer textarea { width: 100%; resize: vertical; border: 0; outline: 0; color: var(--ink); background: transparent; line-height: 1.5; }
.composer textarea::placeholder { color: #909a93; }
.composer-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 8px; }
.character-count { color: var(--muted); font-size: 0.69rem; }
.composer-actions { display: flex; gap: 8px; }
.primary, .secondary { min-height: 38px; padding: 8px 13px; border-radius: 9px; font-weight: 700; cursor: pointer; }
.primary { display: inline-flex; align-items: center; gap: 12px; border: 1px solid var(--green-dark); color: white; background: var(--green-dark); }
.primary:hover { background: var(--green); }
.primary:disabled { cursor: not-allowed; opacity: 0.55; }
.secondary { border: 1px solid var(--line); background: white; }
.secondary:hover { border-color: #9bac9f; }
.compact { min-height: auto; padding: 7px 9px; font-size: 0.72rem; }
.send-icon { font-size: 1.15rem; }
.footnote { margin: 12px 22px 20px; color: var(--muted); font-size: 0.7rem; text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
[hidden] { display: none !important; }

@media (max-width: 800px) {
  .shell { width: min(100% - 20px, 720px); }
  .topbar { min-height: 68px; }
  .brand small { display: none; }
  .health span:last-child { max-width: 150px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .hero { padding: 42px 4px 26px; }
  .workspace { grid-template-columns: 1fr; }
  .settings { position: static; padding: 13px 16px; }
  .settings-heading { margin: 0; }
  .icon-button { display: block; }
  #settings-body { margin-top: 14px; }
  .chat { min-height: 520px; }
  .empty-state { padding: 42px 18px 30px; }
  .messages { padding: 22px 14px 6px; }
  .message-user { width: 92%; }
  .composer { margin: 18px 10px 0; }
  .comment-form { grid-template-columns: 1fr; }
  .footnote { margin-inline: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}