:root {
  --c-bg: #f3f5f9;
  --c-surface: #ffffff;
  --c-text: #1f2937;
  --c-text-2: #4b5563;
  --c-text-3: #8a94a6;
  --c-line: #e5e9f2;
  --c-line-strong: #d3dae6;
  --c-primary: #2563eb;
  --c-primary-hover: #1d4ed8;
  --c-primary-weak: #eef4ff;
  --c-green: #16a34a;
  --c-green-weak: #e9f8ef;
  --c-red: #dc2626;
  --c-red-weak: #fdeceb;
  --c-amber: #b45309;
  --c-amber-weak: #fdf4e3;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.06);
  --shadow-dialog: 0 24px 64px rgba(16, 24, 40, 0.24);
  --topbar-h: 60px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2 { margin: 0; font-weight: 600; }
h1 { font-size: 22px; }
h2 { font-size: 17px; margin-bottom: 16px; }
[hidden] { display: none !important; }

/* ---------- 登录 ---------- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(160deg, #eef3fb 0%, #f7f9fc 45%, #eef6f1 100%);
}

.login-card {
  width: 380px;
  max-width: 100%;
  padding: 34px 30px 26px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: #fff;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 1px;
}

.brand-mark--sm { width: 36px; height: 36px; font-size: 15px; border-radius: 8px; }

.login-card h1 { margin-top: 18px; }
.sub { margin: 6px 0 22px; color: var(--c-text-3); font-size: 13px; }

/* ---------- 表单 ---------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field > span { font-size: 13px; color: var(--c-text-2); }

.input,
.field input {
  width: 100%;
  height: 38px;
  padding: 0 11px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--c-text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.input:focus,
.field input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

select.input { cursor: pointer; }

.hint { color: var(--c-text-3); font-size: 12px; line-height: 1.6; margin: 10px 0 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--c-text-2);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}

.btn:hover { color: var(--c-primary); border-color: var(--c-primary); background: var(--c-primary-weak); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn--primary {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}
.btn--primary:hover { background: var(--c-primary-hover); border-color: var(--c-primary-hover); color: #fff; }

.btn--ghost { background: transparent; border-color: var(--c-line-strong); }
.btn--block { width: 100%; height: 40px; font-size: 14px; margin-top: 6px; }
.btn--sm { height: 30px; padding: 0 10px; font-size: 12px; }
.btn--link {
  border: none;
  background: none;
  height: auto;
  padding: 0 2px;
  color: var(--c-primary);
  font-size: 13px;
}
.btn--link:hover { background: none; text-decoration: underline; }
.btn--danger { color: var(--c-red); }
.btn--danger:hover { color: var(--c-red); border-color: var(--c-red); background: var(--c-red-weak); }

/* ---------- 主框架 ---------- */
.app { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  height: var(--topbar-h);
  flex: 0 0 var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 28px;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-title { font-size: 15px; font-weight: 600; }
.brand-sub { font-size: 12px; color: var(--c-text-3); margin-top: 1px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.admin-name { color: var(--c-text-2); font-size: 13px; margin-right: 4px; }

.tabs {
  display: flex;
  gap: 4px;
  padding: 0 28px;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
}

.tab {
  position: relative;
  height: 44px;
  padding: 0 14px;
  border: none;
  background: none;
  color: var(--c-text-3);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}

.tab:hover { color: var(--c-text); }
.tab.is-active { color: var(--c-primary); font-weight: 500; }
.tab.is-active::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -1px;
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: var(--c-primary);
}

.main {
  flex: 1;
  width: 100%;
  max-width: 1460px;
  margin: 0 auto;
  padding: 20px 28px 40px;
}

.tab-panel {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

/* ---------- 工具栏 ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--c-line);
  background: #fbfcfe;
}

.input--wide { width: 250px; }
.toolbar .input { width: 150px; }
.toolbar .input--wide { width: 250px; }
.spacer { flex: 1; }

/* ---------- 表格 ---------- */
.table-wrap { width: 100%; overflow-x: auto; }

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 1020px;
}

.table th {
  padding: 11px 14px;
  text-align: left;
  font-weight: 500;
  color: var(--c-text-3);
  background: #fafbfd;
  border-bottom: 1px solid var(--c-line);
  white-space: nowrap;
}

.table td {
  padding: 11px 14px;
  border-bottom: 1px solid #f0f3f8;
  color: var(--c-text-2);
  vertical-align: middle;
}

.table tbody tr:hover { background: #fafcff; }
.table tbody tr:last-child td { border-bottom: none; }

.cell-name { color: var(--c-text); font-weight: 500; }
.cell-mono { font-variant-numeric: tabular-nums; color: var(--c-text); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; }

.badge {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 12px;
  white-space: nowrap;
}
.badge--ok { background: var(--c-green-weak); color: var(--c-green); }
.badge--off { background: #f1f3f7; color: var(--c-text-3); }
.badge--warn { background: var(--c-red-weak); color: var(--c-red); }
.badge--pending { background: var(--c-amber-weak); color: var(--c-amber); }

.system-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.system-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 24px;
  padding: 0 9px;
  border-radius: var(--radius-sm);
  background: var(--c-primary-weak);
  color: #1e40af;
  font-size: 12px;
  white-space: nowrap;
}
.system-tag--failed { background: var(--c-red-weak); color: var(--c-red); }
.system-tag--off { background: #f3f4f6; color: var(--c-text-3); }
.system-tag small { font-size: 11px; opacity: 0.8; }

.empty { padding: 40px 16px; text-align: center; color: var(--c-text-3); font-size: 13px; }

.pager {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 12px 16px;
  border-top: 1px solid var(--c-line);
  background: #fbfcfe;
}
.pager-info { margin-right: auto; color: var(--c-text-3); font-size: 12px; }
.pager-page { color: var(--c-text-2); font-size: 12px; min-width: 56px; text-align: center; }

/* ---------- 弹窗 ---------- */
.dialog {
  width: 620px;
  max-width: calc(100vw - 32px);
  padding: 0;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-dialog);
  color: var(--c-text);
}
.dialog--sm { width: 430px; }
.dialog::backdrop { background: rgba(17, 24, 39, 0.45); }
.dialog-body { padding: 22px 24px 18px; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 16px;
}

.section-title {
  margin: 8px 0 10px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text);
}

.systems { display: flex; flex-direction: column; gap: 8px; }

.system-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  background: #fbfcfe;
}
.system-item.is-checked { border-color: #bfd3fb; background: var(--c-primary-weak); }
.system-item input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--c-primary); }
.system-item .system-name { min-width: 96px; font-size: 13px; color: var(--c-text); }
.system-item select { height: 30px; width: 140px; padding: 0 8px; font-size: 12px; }
.system-item .system-state { margin-left: auto; font-size: 12px; color: var(--c-text-3); }

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
}

.password-box {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0 4px;
  padding: 12px 14px;
  border: 1px dashed #bfd3fb;
  border-radius: var(--radius-md);
  background: var(--c-primary-weak);
}
.password-box code { flex: 1; font-size: 20px; letter-spacing: 2px; color: #1e40af; font-weight: 600; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 999;
  max-width: 520px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  background: rgba(17, 24, 39, 0.92);
  color: #fff;
  font-size: 13px;
  box-shadow: 0 10px 30px rgba(16, 24, 40, 0.24);
}
.toast--error { background: rgba(185, 28, 28, 0.95); }

@media (max-width: 900px) {
  .topbar { padding: 0 16px; }
  .tabs { padding: 0 16px; }
  .main { padding: 14px 12px 30px; }
  .brand-sub { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .toolbar .input, .toolbar .input--wide { width: 100%; }
  .toolbar .spacer { display: none; }
}