:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --line: #e6e8ec;
  --text: #101828;
  --muted: #667085;
  --ok: #12b76a;
  --ok-bg: #ecfdf3;
  --warn: #f79009;
  --warn-bg: #fffaeb;
  --bad: #f04438;
  --bad-bg: #fef3f2;
  --busy: #2e90fa;
  --busy-bg: #eff8ff;
  --idle: #98a2b3;
  --idle-bg: #f2f4f7;
  --brand: #101828;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
}
.stats {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.stat {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--idle-bg);
  color: var(--muted);
  font-size: 12.5px;
}
.stat b { color: var(--text); font-weight: 600; }
.stat.ok { background: var(--ok-bg); color: #067647; }
.stat.bad { background: var(--bad-bg); color: #b42318; }
.stat.busy { background: var(--busy-bg); color: #175cd3; }
.actions { margin-left: auto; display: flex; gap: 8px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  font-size: 13.5px;
  cursor: pointer;
  transition: background .15s, border-color .15s, opacity .15s;
  white-space: nowrap;
}
.btn:hover { background: #f9fafb; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { opacity: .88; background: var(--brand); }
.btn.ghost { background: transparent; }
.btn.block { width: 100%; height: 40px; margin-top: 14px; }
.btn:disabled { opacity: .55; cursor: default; }

.icon-btn {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.icon-btn:hover { background: var(--idle-bg); color: var(--text); }

/* ---------- 告警条 ---------- */
.alertbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 24px 0;
  padding: 11px 14px;
  border: 1px solid #fecdca;
  background: var(--bad-bg);
  color: #b42318;
  border-radius: 10px;
  font-size: 13.5px;
}
.alertbar-main { display: flex; align-items: center; gap: 8px; }
.alertbar-btn {
  margin-left: auto;
  border: 1px solid #fda29b;
  background: #fff;
  color: #b42318;
  border-radius: 8px;
  padding: 4px 12px;
  cursor: pointer;
  font-size: 13px;
}

/* ---------- 网格 ---------- */
main { padding: 18px 24px 48px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
  gap: 14px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow .15s, border-color .15s;
}
.card:hover { box-shadow: 0 4px 14px rgba(16, 24, 40, 0.06); }
.card.busy { border-color: #b2ddff; }
.card.bad { border-color: #fecdca; }

.card-top { display: flex; align-items: center; gap: 10px; }
.avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667085, #101828);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 15px;
  flex: 0 0 auto;
  text-transform: uppercase;
}
.who { min-width: 0; flex: 1; }
.uname {
  font-weight: 600;
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.uid { color: var(--muted); font-size: 12px; }

.pill {
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--idle-bg);
  color: var(--muted);
  white-space: nowrap;
}
.pill.ok { background: var(--ok-bg); color: #067647; }
.pill.warn { background: var(--warn-bg); color: #b54708; }
.pill.bad { background: var(--bad-bg); color: #b42318; }
.pill.busy { background: var(--busy-bg); color: #175cd3; }
.pill.busy::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  margin-right: 5px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 1.1s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .25 } }

.meta { color: var(--muted); font-size: 12.5px; display: flex; gap: 6px; flex-wrap: wrap; }
.meta .dot { opacity: .5; }
.msg { font-size: 12.5px; color: #b42318; word-break: break-all; }

.card-actions {
  display: flex;
  gap: 4px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.card-actions .icon-btn { flex: 1; }
.card-actions .icon-btn:hover { background: var(--idle-bg); }
.card-actions .icon-btn.danger:hover { background: var(--bad-bg); color: #b42318; }

/* ---------- 空状态 ---------- */
.empty {
  padding: 70px 20px;
  text-align: center;
  color: var(--muted);
}
.empty-sub { font-size: 13px; margin-top: 6px; opacity: .85; }

/* ---------- 弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(16, 24, 40, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal-card {
  width: 100%;
  max-width: 420px;
  max-height: 88vh;
  overflow: auto;
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 20px 50px rgba(16, 24, 40, 0.2);
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.modal-title { font-size: 16px; font-weight: 600; }

label {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin: 14px 0 6px;
}
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus {
  border-color: #84caff;
  box-shadow: 0 0 0 3px rgba(46, 144, 250, 0.12);
}
textarea { resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }

.tabs { display: flex; gap: 6px; margin: 10px 0 4px; }
.tab {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
}
.tab.active { background: var(--brand); border-color: var(--brand); color: #fff; }

.modal-err { color: #b42318; font-size: 12.5px; min-height: 18px; margin-top: 10px; }

/* ---------- 告警列表 ---------- */
.alert-list { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.alert-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.alert-item .a-body { flex: 1; min-width: 0; }
.alert-item .a-user { font-weight: 600; font-size: 13px; }
.alert-item .a-msg { color: var(--muted); font-size: 12.5px; word-break: break-all; }
.alert-item .a-time { color: var(--muted); font-size: 11.5px; margin-top: 2px; }

/* ---------- 登录页 ---------- */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-card {
  width: 320px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 22px;
  box-shadow: 0 10px 30px rgba(16, 24, 40, 0.06);
}
.login-title { font-size: 17px; font-weight: 600; }
.login-sub { color: var(--muted); font-size: 12.5px; margin: 4px 0 18px; }
.login-err { color: #b42318; font-size: 12.5px; margin-top: 8px; min-height: 16px; }

@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; gap: 10px; padding: 12px 16px; }
  .actions { margin-left: 0; width: 100%; }
  .actions .btn { flex: 1; }
  main { padding: 14px 16px 40px; }
  .alertbar { margin: 12px 16px 0; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
  .card { padding: 12px; }
  .avatar { width: 32px; height: 32px; font-size: 13px; }
}