:root {
  --bg: #f4f1ea;
  --card: #ffffff;
  --ink: #2c2a26;
  --muted: #7a756c;
  --accent: #c2683f;
  --accent-soft: #f0e2da;
  --line: #e4ded4;
  --self: #dceaf0;
  --other: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 18px 48px;
}

h1 {
  font-size: 1.8rem;
  margin: 0 0 4px;
}
.tagline {
  color: var(--muted);
  font-style: italic;
  margin: 0 0 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 18px;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 12px 0 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

input[type="text"], select {
  width: 100%;
  padding: 10px 12px;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

button {
  font-family: inherit;
  font-size: 1rem;
  padding: 11px 18px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  margin-top: 16px;
}
button:hover { background: #a9542f; }
button.secondary {
  background: var(--accent-soft);
  color: var(--accent);
}

.hint {
  font-size: 0.85rem;
  color: var(--muted);
}

.profile-desc {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 6px;
}

.invite-box {
  background: var(--accent-soft);
  border-radius: 8px;
  padding: 12px;
  word-break: break-all;
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
  margin: 8px 0 12px;
}

.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row button { flex: 1 1 auto; }

.error {
  background: #f7e1da;
  color: #9a3b1c;
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 12px;
  font-size: 0.9rem;
}

.hidden { display: none; }

/* ---- Chat ---- */
.chat-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}
.chat-head small { color: var(--muted); }

#messages {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 50vh;
  margin-bottom: 14px;
}

.msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
}
.msg.self {
  align-self: flex-end;
  background: var(--self);
  border-color: #c3dbe6;
}
.msg.other {
  align-self: flex-start;
  background: var(--other);
}
.msg .who {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 2px;
}
.msg .original { margin: 0; }
.duiding {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  font-size: 0.85rem;
  color: var(--muted);
}
.duiding b { color: var(--accent); font-weight: bold; }
.duiding .rewritten { font-style: italic; }

.sys {
  align-self: center;
  font-size: 0.8rem;
  color: var(--muted);
  font-style: italic;
}

.composer { display: flex; gap: 8px; }
.composer input { flex: 1; }
.composer button { margin-top: 0; }