:root {
  --forest: #228B22;
  --deep: #246B35;
  --earth: #8B4513;
  --beige: #F5F5DC;
  --paper: #FFFDF2;
  --sage: #DDE9C8;
  --moss: #78A95C;
  --text: #35452E;
  --muted: #6E795F;
  --border: #A8BF8A;
  --hover: #E2EED2;
  --danger: #b54a3a;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--beige); color: var(--text);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans SC", sans-serif; }
#app { max-width: 960px; margin: 0 auto; padding: 16px; min-height: 100vh; }
.top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; align-items: center; margin-bottom: 12px; }
.brand { display: flex; gap: 10px; align-items: center; }
.brand h1 { margin: 0; font-size: 1.35rem; color: var(--deep); }
.sub { margin: 2px 0 0; color: var(--muted); font-size: .85rem; }
.logo { font-size: 1.8rem; }
.warn { background: #fff3cd; color: #7a5b00; border: 1px solid #e6d28a; padding: 6px 10px; border-radius: 10px; font-size: .85rem; }
.card { background: var(--paper); border: 1px solid var(--border); border-radius: 16px; padding: 18px; box-shadow: 0 2px 0 rgba(36,107,53,.06); }
.lead { line-height: 1.55; margin-top: 0; }
label { display: block; font-size: .9rem; color: var(--muted); margin: 12px 0 6px; }
input { width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border); background: #fff; font-size: 1rem; color: var(--text); }
button { cursor: pointer; border: none; border-radius: 12px; padding: 11px 16px; font-size: 1rem; font-family: inherit; }
button.primary { background: var(--deep); color: #fff; width: 100%; margin-top: 12px; }
button.primary:hover { background: var(--forest); }
button.ghost { background: var(--sage); color: var(--deep); padding: 6px 10px; font-size: .85rem; width: auto; }
button.tiny { padding: 6px 10px; font-size: .8rem; border-radius: 8px; margin-right: 6px; }
button.accept { background: var(--moss); color: #fff; }
button.reject { background: #eee; color: var(--muted); }
.tips { color: var(--muted); font-size: .9rem; padding-left: 1.1rem; }
.layout { display: grid; grid-template-columns: 300px 1fr; gap: 12px; }
@media (max-width: 760px) { .layout { grid-template-columns: 1fr; } }
.side h3 { margin: 14px 0 8px; font-size: .95rem; color: var(--earth); }
.me { background: var(--sage); border-radius: 12px; padding: 12px; }
.me-name { font-weight: 700; color: var(--deep); }
.code-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 6px; font-size: .9rem; }
.code-row strong { letter-spacing: .12em; font-size: 1.15rem; color: var(--earth); }
.list { list-style: none; margin: 0; padding: 0; }
.list li { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 10px; border-radius: 10px; border: 1px solid transparent; }
.list li:hover { background: var(--hover); border-color: var(--border); }
.list button.linkish { background: transparent; color: var(--deep); padding: 0; width: auto; text-align: left; flex: 1; }
.chat { min-height: 420px; display: flex; flex-direction: column; }
.empty { margin: auto; color: var(--muted); text-align: center; padding: 40px 12px; }
.chat-head { display: flex; align-items: center; gap: 10px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.badge { margin-left: auto; background: var(--sage); color: var(--deep); font-size: .75rem; padding: 4px 8px; border-radius: 999px; }
.messages { flex: 1; overflow-y: auto; padding: 12px 0; display: flex; flex-direction: column; gap: 8px; max-height: 55vh; }
.bubble { max-width: 80%; padding: 10px 12px; border-radius: 14px; line-height: 1.45; word-break: break-word; }
.bubble.mine { align-self: flex-end; background: var(--deep); color: #fff; border-bottom-right-radius: 4px; }
.bubble.theirs { align-self: flex-start; background: #fff; border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.bubble .meta { display: block; font-size: .72rem; opacity: .75; margin-top: 4px; }
.bubble.burned-note { align-self: center; background: transparent; color: var(--muted); font-size: .85rem; border: none; padding: 4px; }
.composer { display: flex; gap: 8px; padding-top: 10px; border-top: 1px solid var(--border); }
.composer input { flex: 1; }
.composer button { width: auto; margin: 0; }
.muted { color: var(--muted); font-size: .85rem; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--text); color: #fff; padding: 10px 16px; border-radius: 999px; font-size: .9rem; z-index: 9; }
[hidden] { display: none !important; }

button.danger {
  background: var(--danger);
  color: #fff;
  padding: 6px 12px;
  font-size: .82rem;
  width: auto;
  margin-left: 4px;
  border-radius: 10px;
  flex-shrink: 0;
}
button.danger:hover { filter: brightness(1.05); }
.chat-head .badge { margin-left: auto; }
.foot { text-align: center; margin: 14px 0 8px; font-size: .8rem; }