:root {
  --ink: #102033;
  --muted: #5b6777;
  --line: #d9e1ea;
  --paper: #f6f8fb;
  --card: #ffffff;
  --brand: #0f5f8b;
  --brand-2: #0a7a5a;
  --warn: #8a4b12;
  --user: #e8f3fa;
  --bot: #ffffff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.top a { color: var(--brand); text-decoration: none; font-weight: 650; }
.cta, button.primary {
  background: var(--brand-2);
  color: #fff !important;
  border: 0;
  border-radius: 6px;
  padding: 0.55rem 0.9rem;
  font-weight: 650;
  cursor: pointer;
  text-decoration: none;
}
.shell {
  max-width: 920px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 56px);
}
.lede { margin: 0.4rem 0 1rem; color: var(--muted); font-size: 0.95rem; }
.modes { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 0.75rem; }
.modes label {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  font-size: 0.85rem;
  cursor: pointer;
}
.modes input { margin-right: 0.3rem; }
.chat {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  min-height: 420px;
  overflow: hidden;
}
.msgs { flex: 1; overflow-y: auto; padding: 1rem; background: var(--paper); }
.msg { max-width: 86%; margin-bottom: 0.8rem; padding: 0.7rem 0.8rem; border-radius: 8px; }
.msg p { white-space: pre-wrap; overflow-wrap: anywhere; }
.user { margin-left: auto; background: var(--user); }
.bot { background: var(--bot); border: 1px solid var(--line); }
.msg img { max-width: 100%; border-radius: 6px; margin-top: 0.5rem; }
.msg canvas { max-width: 100%; margin-top: 0.5rem; }
.composer { display: flex; gap: 0.5rem; padding: 0.7rem; border-top: 1px solid var(--line); background: #fff; }
#user-input {
  flex: 1;
  min-height: 44px;
  resize: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.6rem;
  font: inherit;
}
#send { background: var(--brand); color: #fff; border: 0; border-radius: 6px; padding: 0 1rem; cursor: pointer; }
#send:disabled { opacity: 0.5; }
.fine, footer { color: var(--muted); font-size: 0.8rem; margin-top: 0.8rem; }
.kicker { text-transform: uppercase; letter-spacing: 0.04em; color: var(--brand); font-size: 0.75rem; margin-bottom: 0.5rem; }
.page { max-width: 760px; margin: 0 auto; }
.article { padding: 1.2rem; }
.article h1, .article h2 { margin: 0.8rem 0 0.4rem; }
.article p, .article li { margin: 0.45rem 0; line-height: 1.55; }
.notice { font-size: 0.8rem; color: var(--warn); }