:root {
  --c-bg:        #f5f7fb;
  --c-panel:     #ffffff;
  --c-border:    #e6e8ef;
  --c-text:      #1f2433;
  --c-text-mute: #6b7390;
  --c-text-soft: #9ba2bd;
  --c-primary:   #6366f1;
  --c-primary-d: #4f46e5;
  --c-primary-l: #eef2ff;
  --c-success:   #10b981;
  --c-warn:      #f59e0b;
  --c-danger:    #ef4444;
  --c-info:      #0ea5e9;

  --shadow-sm:   0 1px 2px rgba(15, 23, 42, .04), 0 1px 1px rgba(15, 23, 42, .03);
  --shadow-md:   0 6px 24px -8px rgba(15, 23, 42, .12), 0 2px 4px rgba(15, 23, 42, .04);
  --shadow-lg:   0 24px 48px -16px rgba(15, 23, 42, .25);

  --radius-sm:   6px;
  --radius:      10px;
  --radius-lg:   14px;

  --sidebar-w:   240px;
  --topbar-h:    64px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei",
               "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* ========================== 登录屏 ========================== */
.auth-screen {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(at 20% 30%, rgba(99,102,241, .25), transparent 50%),
    radial-gradient(at 80% 70%, rgba(168, 85, 247, .25), transparent 50%),
    linear-gradient(135deg, #1e1b4b 0%, #0f172a 100%);
  z-index: 999;
}
.auth-card {
  width: 380px;
  padding: 40px 36px 36px;
  background: rgba(255, 255, 255, .98);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
}
.auth-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 700;
  color: var(--c-primary-d);
  margin-bottom: 6px;
}
.auth-logo-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800;
  box-shadow: 0 6px 14px -4px rgba(99,102,241,.55);
}
.auth-card h1 { margin: 22px 0 8px; font-size: 22px; }
.auth-card p.muted { color: var(--c-text-mute); margin: 0 0 24px; font-size: 13px; }

/* ========================== 应用骨架 ========================== */
.app { display: flex; min-height: 100vh; }

/* ===== 侧边栏 ===== */
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  background: linear-gradient(180deg, #1e1b4b 0%, #0f172a 100%);
  color: #cbd5e1;
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
}
.sidebar-brand {
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 10px;
  padding: 0 22px;
  font-weight: 700; font-size: 16px;
  color: #ffffff;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.sidebar-brand-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800;
}
.sidebar-section {
  padding: 18px 14px 6px;
  font-size: 11px;
  letter-spacing: .12em; text-transform: uppercase;
  color: #64748b;
}
.sidebar-nav { padding: 0 10px; flex: 1; overflow-y: auto; }
.sidebar-link {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  color: #cbd5e1;
  font-size: 14px;
  margin-bottom: 4px;
  cursor: pointer;
  transition: all .18s;
}
.sidebar-link:hover {
  background: rgba(255,255,255,.06);
  color: #ffffff;
}
.sidebar-link.active {
  background: rgba(99, 102, 241, .25);
  color: #ffffff;
  box-shadow: inset 2px 0 0 #818cf8;
}
.sidebar-link svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar-footer {
  padding: 14px 18px;
  border-top: 1px solid rgba(255,255,255,.06);
  font-size: 12px; color: #64748b;
}
.sidebar-footer .logout-btn {
  display: block; margin-top: 10px;
  background: transparent; color: #cbd5e1;
  border: 1px solid rgba(255,255,255,.12);
  padding: 6px 10px; border-radius: 6px;
  cursor: pointer; font-size: 12px;
  transition: all .15s;
}
.sidebar-footer .logout-btn:hover {
  background: rgba(239, 68, 68, .15);
  color: #fecaca;
  border-color: rgba(239, 68, 68, .35);
}

/* ===== 主内容区 ===== */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  height: var(--topbar-h);
  background: var(--c-panel);
  border-bottom: 1px solid var(--c-border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 28px;
  position: sticky; top: 0; z-index: 10;
}
.topbar-title { font-size: 18px; font-weight: 600; }
.topbar-meta { color: var(--c-text-mute); font-size: 13px; }
.topbar-meta code {
  background: var(--c-primary-l);
  color: var(--c-primary-d);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.page {
  padding: 24px 28px 60px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 18px;
  gap: 16px;
}
.page-header h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
}
.page-header .desc {
  margin-top: 4px;
  color: var(--c-text-mute);
  font-size: 13px;
}

/* ===== 工具条 ===== */
.toolbar {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap;
  padding: 14px 16px;
  background: var(--c-panel);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  margin-bottom: 14px;
}
.toolbar input, .toolbar select {
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--c-text);
  font-size: 13px;
  outline: none;
  min-width: 140px;
}
.toolbar input:focus, .toolbar select:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, .15);
}
.toolbar .grow { flex: 1; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 34px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  background: var(--c-panel);
  color: var(--c-text);
  border-color: var(--c-border);
  transition: all .15s;
  white-space: nowrap;
}
.btn:hover { background: #f8fafc; }
.btn-primary {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
  box-shadow: 0 4px 12px -4px rgba(99,102,241, .55);
}
.btn-primary:hover { background: var(--c-primary-d); border-color: var(--c-primary-d); }
.btn-danger {
  background: #fff;
  color: var(--c-danger);
  border-color: #fecaca;
}
.btn-danger:hover { background: #fef2f2; }
.btn-warn {
  background: #fff;
  color: #b45309;
  border-color: #fde68a;
}
.btn-warn:hover { background: #fffbeb; }
.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--c-text-mute);
}
.btn-ghost:hover { background: var(--c-primary-l); color: var(--c-primary-d); }
.btn-sm { height: 28px; padding: 0 10px; font-size: 12px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ===== 卡片 ===== */
.card {
  background: var(--c-panel);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.card + .card { margin-top: 14px; }
.card-body { padding: 18px 20px; }

/* ===== 仪表盘统计卡 ===== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}
.stat-card {
  background: var(--c-panel);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  display: flex; align-items: center; gap: 14px;
  position: relative; overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--c-primary);
}
.stat-card.s-success::before { background: var(--c-success); }
.stat-card.s-warn::before    { background: var(--c-warn); }
.stat-card.s-danger::before  { background: var(--c-danger); }
.stat-card.s-info::before    { background: var(--c-info); }
.stat-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--c-primary-l);
  color: var(--c-primary-d);
  display: flex; align-items: center; justify-content: center;
}
.stat-card.s-success .stat-icon { background: #ecfdf5; color: #047857; }
.stat-card.s-warn .stat-icon    { background: #fffbeb; color: #b45309; }
.stat-card.s-danger .stat-icon  { background: #fef2f2; color: #b91c1c; }
.stat-card.s-info .stat-icon    { background: #f0f9ff; color: #0369a1; }
.stat-icon svg { width: 22px; height: 22px; }
.stat-meta .label { font-size: 12px; color: var(--c-text-mute); }
.stat-meta .value { font-size: 22px; font-weight: 600; margin-top: 2px; }

/* ===== 表格 ===== */
.table-wrap {
  background: var(--c-panel);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
table.dt {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table.dt th, table.dt td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: middle;
}
table.dt thead th {
  background: #fafbfd;
  color: var(--c-text-mute);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--c-border);
  white-space: nowrap;
}
table.dt tbody tr {
  border-top: 1px solid var(--c-border);
  transition: background .12s;
}
table.dt tbody tr:first-child { border-top: 0; }
table.dt tbody tr:hover { background: #fafbfd; }
table.dt td .row-actions {
  display: flex; gap: 4px;
  justify-content: flex-end;
}
table.dt td.mono {
  font-family: 'JetBrains Mono', Menlo, Consolas, monospace;
  font-size: 12px;
  color: var(--c-text-mute);
}
table.dt td.num { text-align: right; font-variant-numeric: tabular-nums; }
table.dt .empty {
  padding: 60px 0;
  text-align: center;
  color: var(--c-text-soft);
}

/* ===== 状态徽章 ===== */
.badge {
  display: inline-flex; align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  background: #eef2ff; color: var(--c-primary-d);
}
.badge.b-default { background: #f1f5f9; color: #475569; }
.badge.b-success { background: #dcfce7; color: #15803d; }
.badge.b-warn    { background: #fef3c7; color: #b45309; }
.badge.b-danger  { background: #fee2e2; color: #b91c1c; }
.badge.b-info    { background: #e0f2fe; color: #0369a1; }
.badge.b-muted   { background: #f1f5f9; color: #64748b; }

/* ===== 分页 ===== */
.pager {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--c-border);
  background: #fafbfd;
  font-size: 13px;
}
.pager .grow { flex: 1; color: var(--c-text-mute); font-size: 12px; }
.pager button {
  height: 28px; padding: 0 10px;
  border: 1px solid var(--c-border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}
.pager button[disabled] { opacity: .5; cursor: not-allowed; }
.pager button:hover:not([disabled]) { border-color: var(--c-primary); color: var(--c-primary-d); }

/* ===== 弹窗 / 抽屉 ===== */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, .45);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  animation: fadeIn .15s ease-out;
}
.modal {
  background: var(--c-panel);
  border-radius: var(--radius-lg);
  width: 560px;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 64px);
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: popIn .18s ease-out;
}
.modal.modal-lg  { width: 760px; }
.modal.modal-xl  { width: 1000px; }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-border);
}
.modal-header h3 { margin: 0; font-size: 16px; font-weight: 600; }
.modal-header .close {
  background: transparent; border: 0;
  color: var(--c-text-mute); cursor: pointer;
  padding: 4px; display: inline-flex;
}
.modal-header .close:hover { color: var(--c-text); }

.modal-body { padding: 20px; overflow-y: auto; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid var(--c-border);
  background: #fafbfd;
}

/* ===== 表单 ===== */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 16px;
}
.form-grid .col-2 { grid-column: 1 / -1; }
.form-item label {
  display: block;
  font-size: 12px;
  color: var(--c-text-mute);
  margin-bottom: 4px;
}
.form-item label .required { color: var(--c-danger); margin-left: 2px; }
.form-item input,
.form-item select,
.form-item textarea {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  font-size: 13px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--c-text);
  outline: none;
  transition: all .15s;
  font-family: inherit;
}
.form-item textarea { height: auto; padding: 8px 10px; resize: vertical; min-height: 80px; }
.form-item input:focus,
.form-item select:focus,
.form-item textarea:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, .15);
}
.form-item .help {
  font-size: 12px;
  color: var(--c-text-soft);
  margin-top: 4px;
}
.form-item.checkbox {
  display: flex; align-items: center; gap: 8px;
}
.form-item.checkbox input[type="checkbox"] {
  width: 16px; height: 16px; padding: 0; margin: 0;
  accent-color: var(--c-primary);
}
.form-item.checkbox label { margin: 0; font-size: 13px; color: var(--c-text); }

.form-section-title {
  grid-column: 1 / -1;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-mute);
  letter-spacing: .04em;
  text-transform: uppercase;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--c-border);
  margin-top: 6px;
}

/* ===== 详情视图（站点详情等） ===== */
.detail-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 8px 16px;
  font-size: 13px;
}
.detail-grid dt { color: var(--c-text-mute); }
.detail-grid dd { margin: 0; }

.tabs {
  display: flex; gap: 4px;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 14px;
}
.tab {
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13px;
  color: var(--c-text-mute);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab:hover { color: var(--c-text); }
.tab.active {
  color: var(--c-primary-d);
  border-bottom-color: var(--c-primary);
  font-weight: 500;
}

/* ===== Toast ===== */
.toast-wrap {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 1000;
  display: flex; flex-direction: column; gap: 8px;
  pointer-events: none;
}
.toast {
  min-width: 240px; max-width: 380px;
  padding: 12px 16px;
  background: var(--c-panel);
  border-left: 4px solid var(--c-primary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  display: flex; gap: 10px; align-items: flex-start;
  animation: slideInRight .25s ease-out;
  pointer-events: auto;
}
.toast.t-success { border-left-color: var(--c-success); }
.toast.t-warn    { border-left-color: var(--c-warn); }
.toast.t-error   { border-left-color: var(--c-danger); }
.toast .toast-icon {
  width: 18px; height: 18px;
  flex-shrink: 0;
  margin-top: 1px;
  color: var(--c-primary);
}
.toast.t-success .toast-icon { color: var(--c-success); }
.toast.t-warn .toast-icon { color: var(--c-warn); }
.toast.t-error .toast-icon { color: var(--c-danger); }
.toast .toast-msg { flex: 1; word-break: break-word; }

/* ===== Loader ===== */
.loader {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(99,102,241,.2);
  border-top-color: var(--c-primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  vertical-align: middle;
}
.loading-mask {
  display: flex; align-items: center; justify-content: center;
  padding: 60px 0;
  color: var(--c-text-mute);
  gap: 10px;
}

/* ===== 动画 ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn  { from { opacity: 0; transform: scale(.95); } to { opacity: 1; transform: scale(1); } }
@keyframes slideInRight { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .sidebar { width: 64px; }
  .sidebar-brand span,
  .sidebar-link span,
  .sidebar-section,
  .sidebar-footer { display: none; }
  .sidebar-link { justify-content: center; }
  .form-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 110px 1fr; }
}