:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1c1e21;
  --muted: #8a929e;
  --accent: #2563eb;
  --code-bg: #fff7e6;
  --border: #e5e8ee;
  --unread: #2563eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* ---- 顶栏 ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 18px; margin: 0; }
.topbar-right { display: flex; gap: 8px; align-items: center; }

.conn { font-size: 12px; padding: 2px 10px; border-radius: 999px; }
.conn.live { color: #0a7d33; background: #e5f6ec; }
.conn.offline { color: #b3261e; background: #fdecea; }

button.ghost {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
}
button.ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---- 工具栏 ---- */
.toolbar {
  display: flex;
  gap: 10px;
  padding: 10px 16px;
  align-items: center;
  flex-wrap: wrap;
}
.chips { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; }
.chip {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
  cursor: pointer;
}
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

#search {
  flex-basis: 240px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 14px;
  background: #fff;
}

/* ---- 消息列表 ---- */
.list {
  max-width: 760px;
  margin: 0 auto;
  padding: 6px 16px 60px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.msg {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
}
.msg.unread {
  border-left: 4px solid var(--unread);
  background: #fbfcff;
}
.meta {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
}
.device {
  background: #eef2ff;
  color: #3b4bc8;
  border-radius: 6px;
  padding: 1px 8px;
  font-weight: 600;
}
.card-tag {
  background: #f0fdf4;
  color: #15803d;
  border-radius: 6px;
  padding: 1px 8px;
}
.sender { font-weight: 600; color: var(--text); }
.meta time { margin-left: auto; }

.content {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.6;
  word-break: break-all;
  white-space: pre-wrap;
}

mark.code {
  background: var(--code-bg);
  color: #b45309;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 6px;
}

.actions { margin-top: 8px; display: flex; gap: 8px; align-items: center; }
.actions .copy {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
}
.actions .copy:hover { background: #1d4fd7; }
.actions .del {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
}
.actions .del:hover { color: #b3261e; }

.load-more-wrap { text-align: center; padding-bottom: 40px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translateX(-50%);
  background: #1c1e21;
  color: #fff;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  z-index: 99;
}

/* ---- 登录页 ---- */
.login-body {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
}
.login-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  width: min(360px, 90vw);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.login-card h1 { font-size: 20px; margin: 0; text-align: center; }
.login-card .hint { color: var(--muted); font-size: 13px; margin: 0; text-align: center; }
.login-card input {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
}
.login-card button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px;
  font-size: 15px;
  cursor: pointer;
}
.error { color: #b3261e; font-size: 13px; margin: 0; text-align: center; }

@media (max-width: 520px) {
  .topbar { padding: 8px 12px; }
  .toolbar { padding: 8px 12px; }
  #search { flex-basis: 100%; }
}