:root {
  --yellow: #F6B600;
  --black: #0A0A0A;
  --white: #FFFFFF;
  --muted: #626262;
  --line: #E8E8E8;
  --bg: #F7F7F5;
  --danger: #8A1F11;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--black);
}
.page {
  width: min(980px, 92vw);
  margin: 0 auto;
  padding: 48px 0;
}
.hero {
  background: var(--black);
  color: var(--white);
  border-radius: 24px;
  padding: 36px;
  box-shadow: 0 18px 44px rgba(0,0,0,0.12);
}
.eyebrow {
  color: var(--yellow);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 12px;
}
h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.05;
}
.lead {
  font-size: 1.1rem;
  line-height: 1.6;
  max-width: 760px;
}
.notice {
  margin-top: 24px;
  background: rgba(246, 182, 0, 0.16);
  border: 1px solid rgba(246, 182, 0, 0.45);
  border-radius: 16px;
  padding: 16px;
  line-height: 1.5;
}
.chat-card {
  margin-top: 28px;
  background: var(--white);
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  border: 1px solid var(--line);
}
label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}
input[type="password"], textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  font: inherit;
  background: #fff;
}
textarea { resize: vertical; }
.checkbox-row {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 18px 0;
  font-weight: 500;
  line-height: 1.45;
}
.checkbox-row input { margin-top: 4px; }
.examples {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  margin: 20px 0;
}
.examples p { margin: 0 0 10px; font-weight: 700; }
.examples button {
  margin: 6px 6px 6px 0;
  border: 1px solid var(--black);
  background: var(--white);
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
}
.examples button:hover { background: var(--yellow); }
.messages {
  min-height: 120px;
  margin: 18px 0;
}
.message {
  border-radius: 16px;
  padding: 14px 16px;
  margin-bottom: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
}
.message.user {
  background: #F1F1F1;
  border: 1px solid var(--line);
}
.message.agent {
  background: #FFF8DC;
  border: 1px solid rgba(246, 182, 0, 0.45);
}
.message.error {
  color: var(--danger);
  background: #FFF0ED;
  border: 1px solid #E7A49B;
}
.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
}
button[type="submit"] {
  background: var(--yellow);
  color: var(--black);
  border: 0;
  border-radius: 14px;
  padding: 13px 18px;
  font-weight: 800;
  cursor: pointer;
}
button[disabled] { opacity: 0.55; cursor: not-allowed; }
.footer-note {
  color: var(--muted);
  line-height: 1.5;
  padding: 18px 4px;
}
@media (max-width: 640px) {
  .hero, .chat-card { padding: 22px; border-radius: 18px; }
  .form-actions { flex-direction: column; align-items: stretch; }
}