/* ===== 基础变量 - 清爽风格 ===== */
:root {
  --bg: #f8f9fa;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f3f5;
  --bg-input: #ffffff;
  --bg-modal: #ffffff;
  --bg-secondary: #f8f9fa;
  --text: #212529;
  --text-dim: #6c757d;
  --text-muted: #adb5bd;
  --border: #e9ecef;
  --border-light: #f1f3f5;
  --primary: #4c6ef5;
  --primary-hover: #4263eb;
  --primary-light: #edf2ff;
  --success: #51cf66;
  --success-bg: #d3f9d8;
  --warning: #fcc419;
  --warning-bg: #fff3bf;
  --danger: #ff6b6b;
  --danger-bg: #ffe3e3;
  --warning: #ffd43b;
  --warning-bg: #fff3bf;
  --info: #22b8cf;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
}

* { margin:0; padding:0; box-sizing:border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ===== 导航栏 ===== */
.navbar {
  display:flex; align-items:center; justify-content:space-between;
  padding: 20px 40px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky; top:0; z-index:100;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}
.nav-brand { display:flex; align-items:center; gap:12px; font-size:1.4rem; font-weight:600; color:var(--text); }
.nav-brand i { font-size:1.8rem; color:var(--primary); }
.nav-actions { display:flex; align-items:center; gap:16px; }
.last-update { font-size:0.85rem; color:var(--text-dim); }
.admin-info { display:flex; align-items:center; gap:10px; color:var(--text-dim); font-size:0.9rem; }

/* ===== 统计栏（已移除）===== */

/* ===== 渠道网格 ===== */
.container { max-width:1400px; margin:0 auto; padding:40px; }
.channel-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(340px,1fr)); gap:24px; }

.channel-card {
  background: var(--bg-card);
  border:1px solid var(--border);
  border-radius: var(--radius);
  padding:28px;
  transition: all 0.2s ease;
  cursor:pointer;
  position:relative;
  overflow:hidden;
  box-shadow: var(--shadow);
}
.channel-card:hover {
  background:var(--bg-card-hover);
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color: var(--primary);
}
.channel-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:4px;
}
.channel-card.normal::before { background:var(--success); }
.channel-card.degraded::before { background:var(--warning); }
.channel-card.fused::before { background:var(--danger); }
.channel-card.online::before { background:var(--success); }
.channel-card.offline::before { background:var(--danger); }
.channel-card.unknown::before { background:var(--text-muted); }

.card-header { display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:18px; }
.card-name { font-size:1.15rem; font-weight:600; color:var(--text); }
.card-url {
  font-size:0.8rem;
  color:var(--text-dim);
  margin-top:6px;
  word-break:break-all;
  font-family: 'SF Mono', Monaco, 'Courier New', monospace;
  background: var(--bg-secondary);
  padding: 6px 10px;
  border-radius: 6px;
  display: inline-block;
}

.status-badge {
  display:inline-flex; align-items:center; gap:6px;
  padding:6px 14px; border-radius:20px; font-size:0.8rem; font-weight:600;
  white-space:nowrap;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.status-badge.normal { background:var(--success-bg); color:var(--success); }
.status-badge.degraded { background:var(--warning-bg); color:#e67700; }
.status-badge.fused { background:var(--danger-bg); color:var(--danger); }
.status-badge.online { background:var(--success-bg); color:var(--success); }
.status-badge.offline { background:var(--danger-bg); color:var(--danger); }
.status-badge.unknown { background:var(--bg-secondary); color:var(--text-muted); }

.status-dot { width:8px; height:8px; border-radius:50%; }
.status-dot.normal { background:var(--success); animation:pulse 2s infinite; }
.status-dot.degraded { background:var(--warning); animation:pulse 2s infinite; }
.status-dot.fused { background:var(--danger); }
.status-dot.online { background:var(--success); animation:pulse 2s infinite; }
.status-dot.offline { background:var(--danger); }
.status-dot.unknown { background:var(--text-muted); }

@keyframes pulse {
  0%,100% { opacity:1; } 50% { opacity:0.5; }
}

.card-meta {
  display:flex;
  flex-direction:column;
  gap:10px;
  padding-top:14px;
  border-top:1px solid var(--border-light);
}
.meta-row { display:flex; justify-content:space-between; font-size:0.85rem; }
.meta-label { color:var(--text-dim); font-weight:500; }
.meta-value { color:var(--text); font-weight:600; }
.card-error {
  font-size:0.8rem;
  color:var(--danger);
  margin-top:10px;
  padding:10px 12px;
  background:var(--danger-bg);
  border-radius:var(--radius-sm);
  word-break:break-all;
  border-left: 3px solid var(--danger);
}

/* 健康状态进度条 */
.health-bar {
  display: flex;
  gap: 3px;
  margin: 16px 0;
  height: 10px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-secondary);
  padding: 2px;
}

.health-segment {
  flex: 1;
  min-width: 3px;
  transition: all 0.2s;
  cursor: pointer;
  border-radius: 3px;
}

.health-segment.normal {
  background: var(--success);
}

.health-segment.degraded {
  background: var(--warning);
}

.health-segment.fused {
  background: var(--danger);
}

.health-segment.online {
  background: var(--success);
}

.health-segment.offline {
  background: var(--danger);
}

.health-segment.unknown {
  background: var(--text-muted);
  opacity: 0.4;
}

.health-segment:hover {
  opacity: 0.8;
  transform: scaleY(1.3);
}

/* ===== 空状态 ===== */
.empty-state { grid-column:1/-1; text-align:center; padding:80px 20px; color:var(--text-dim); }
.empty-state i { font-size:4rem; margin-bottom:16px; display:block; }
.empty-state .sub { font-size:0.85rem; color:var(--text-muted); margin-top:8px; }

/* ===== 按钮 ===== */
.btn {
  display:inline-flex; align-items:center; gap:8px; padding:10px 20px; border:none;
  border-radius:var(--radius-sm); font-size:0.9rem; font-weight:600; cursor:pointer;
  transition:all 0.2s; box-shadow: var(--shadow);
}
.btn:hover { transform:translateY(-2px); box-shadow:var(--shadow-hover); }
.btn:active { transform:translateY(0); }
.btn-sm { padding:6px 14px; font-size:0.85rem; }
.btn-primary { background:var(--primary); color:#fff; }
.btn-primary:hover { background:var(--primary-hover); }
.btn-success { background:var(--success); color:#fff; }
.btn-success:hover { filter:brightness(1.1); }
.btn-danger { background:var(--danger); color:#fff; }
.btn-danger:hover { filter:brightness(1.1); }
.btn-info { background:var(--info); color:#fff; }
.btn-info:hover { filter:brightness(1.1); }
.btn-ghost { background:transparent; color:var(--text-dim); border:1px solid var(--border); box-shadow:none; }
.btn-ghost:hover { color:var(--text); border-color:var(--text-dim); background:var(--bg-secondary); }
.btn-icon { background:none; border:none; color:var(--text-dim); cursor:pointer;
  padding:8px; border-radius:var(--radius-sm); transition:all 0.2s; box-shadow:none; }
.btn-icon:hover { color:var(--text); background:var(--bg-secondary); }

/* ===== 弹窗 ===== */
.modal { position:fixed; top:0; left:0; right:0; bottom:0; z-index:1000;
  display:flex; align-items:center; justify-content:center; }
.modal-overlay { position:absolute; top:0; left:0; right:0; bottom:0;
  background:rgba(0,0,0,0.4); backdrop-filter:blur(8px); }
.modal-content {
  position:relative; background:var(--bg-modal); border:1px solid var(--border);
  border-radius:var(--radius); box-shadow:0 20px 60px rgba(0,0,0,0.15);
  width:90%; animation:modalIn 0.3s ease;
}
.modal-sm { max-width:420px; }
.modal-md { max-width:560px; max-height:90vh; display:flex; flex-direction:column; }
.modal-lg { max-width:900px; max-height:85vh; display:flex; flex-direction:column; }
.modal-header {
  display:flex; justify-content:space-between; align-items:center;
  padding:24px 28px; border-bottom:1px solid var(--border);
}
.modal-header h3 { display:flex; align-items:center; gap:10px; font-size:1.2rem; font-weight:600; }
.modal-body { padding:28px; overflow-y:auto; }
.modal-footer {
  padding:20px 28px; border-top:1px solid var(--border);
  display:flex; justify-content:flex-end; gap:12px;
}
.btn-close {
  background:none; border:none; color:var(--text-dim); font-size:1.5rem;
  cursor:pointer; line-height:1; padding:4px; border-radius:var(--radius-sm);
  transition:all 0.2s;
}
.btn-close:hover { color:var(--text); background:var(--bg-secondary); }

@keyframes modalIn { from { opacity:0; transform:scale(0.96) translateY(-10px); } to { opacity:1; transform:scale(1) translateY(0); } }

/* ===== 表单 ===== */
.form-group { margin-bottom:20px; }
.form-group label {
  display:block; font-size:0.9rem; color:var(--text); margin-bottom:8px;
  font-weight:600;
}
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"] {
  width:100%; padding:12px 16px; background:var(--bg-input); border:1px solid var(--border);
  border-radius:var(--radius-sm); color:var(--text); font-size:0.95rem;
  transition:all 0.2s; box-shadow:var(--shadow);
}
.form-group input:focus {
  outline:none; border-color:var(--primary);
  box-shadow:0 0 0 3px var(--primary-light);
}
.form-group small {
  display:block; margin-top:6px; font-size:0.85rem;
  color:var(--text-dim);
}
.form-row { display:grid; grid-template-columns:1fr auto; gap:16px; align-items:end; }
.error-msg { color:var(--danger); font-size:0.85rem; margin-top:8px; min-height:20px; }
.success-msg { color:var(--success); font-size:0.85rem; margin-top:8px; min-height:20px; }

/* ===== 开关 ===== */
.switch { position:relative; display:inline-block; width:44px; height:24px; }
.switch input { opacity:0; width:0; height:0; }
.slider { position:absolute; cursor:pointer; top:0; left:0; right:0; bottom:0;
  background:var(--border); border-radius:24px; transition:0.3s; }
.slider::before { content:''; position:absolute; height:18px; width:18px; left:3px; bottom:3px;
  background:var(--text); border-radius:50%; transition:0.3s; }
input:checked + .slider { background:var(--success); }
input:checked + .slider::before { transform:translateX(20px); }

/* ===== 管理列表 ===== */
.admin-channel-list { display:flex; flex-direction:column; gap:14px; }
.admin-channel-item {
  display:flex; justify-content:space-between; align-items:center;
  padding:18px 20px; background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-sm); gap:14px; transition:all 0.2s;
  box-shadow:var(--shadow);
}
.admin-channel-item:hover {
  border-color:var(--primary);
  box-shadow:var(--shadow-hover);
  transform:translateX(4px);
}
.admin-ch-info { flex:1; min-width:0; }
.admin-ch-name { font-weight:600; font-size:1rem; color:var(--text); }
.admin-ch-url {
  font-size:0.8rem; color:var(--text-dim); margin-top:4px;
  font-family: 'SF Mono', Monaco, monospace;
}
.admin-ch-actions { display:flex; gap:8px; flex-shrink:0; }

/* ===== 管理员二级页面 ===== */
.admin-page {
  position:fixed; top:0; left:0; right:0; bottom:0;
  background:var(--bg); z-index:900;
  display:flex; flex-direction:column;
  animation:fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }

.admin-topbar {
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 32px;
  background:var(--bg-card);
  border-bottom:1px solid var(--border);
  flex-shrink:0;
  box-shadow:var(--shadow);
}
.admin-topbar-left { display:flex; align-items:center; gap:20px; }
.admin-topbar-left h2 { font-size:1.3rem; font-weight:600; display:flex; align-items:center; gap:10px; color:var(--text); }
.admin-topbar-right { display:flex; align-items:center; gap:16px; }
.admin-user { color:var(--text-dim); font-size:0.9rem; }

.admin-layout { display:flex; flex:1; overflow:hidden; }

.admin-sidebar {
  width:240px; flex-shrink:0;
  background:var(--bg-card);
  border-right:1px solid var(--border);
  padding:24px 0;
  overflow-y:auto;
}
.sidebar-nav { display:flex; flex-direction:column; gap:4px; padding:0 12px; }
.sidebar-item {
  display:flex; align-items:center; gap:12px;
  width:100%; padding:14px 18px;
  background:none; border:none; border-radius:var(--radius-sm);
  color:var(--text-dim); font-size:0.95rem; font-weight:500;
  cursor:pointer; transition:all 0.2s; text-align:left;
  border-left:3px solid transparent;
}
.sidebar-item:hover { color:var(--text); background:var(--bg-secondary); }
.sidebar-item.active {
  color:var(--primary); background:var(--primary-light);
  font-weight:600; border-left-color:var(--primary);
}
.sidebar-item i { font-size:1.3rem; }

.admin-content { flex:1; overflow-y:auto; padding:32px 40px; }

.admin-tab { display:none; }
.admin-tab.active { display:block; }

.admin-section-header {
  display:flex; justify-content:space-between; align-items:center;
  margin-bottom:28px; padding-bottom:16px;
  border-bottom:2px solid var(--border);
}
.admin-section-header h3 {
  font-size:1.4rem; font-weight:600;
  display:flex; align-items:center; gap:10px;
  color:var(--text);
}
.admin-section-header h3 i { color:var(--primary); }
.admin-section-actions { display:flex; gap:10px; }

.settings-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius); padding:28px;
  box-shadow:var(--shadow); margin-bottom:24px;
}
.settings-card h4 {
  font-size:1.1rem; font-weight:600; margin-bottom:20px;
  display:flex; align-items:center; gap:10px; color:var(--text);
}
.settings-card h4 i { color:var(--primary); }
.settings-form { max-width:500px; }
.settings-form .form-group { display:flex; flex-direction:column; gap:8px; margin-bottom:20px; }
.settings-form .form-group label { color:var(--text); font-weight:600; font-size:0.95rem; }
.settings-form .form-group input {
  padding:12px 16px; background:var(--bg-input); border:1px solid var(--border);
  border-radius:var(--radius-sm); color:var(--text); font-size:0.95rem; transition:all 0.2s;
  box-shadow:var(--shadow);
}
.settings-form .form-group input:focus {
  outline:none; border-color:var(--primary);
  box-shadow:0 0 0 3px var(--primary-light);
}
.settings-form .form-group small { color:var(--text-dim); font-size:0.85rem; }

/* 显示控制区域 */
.display-toggle-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}
.display-toggle-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.display-toggle-item:hover {
  background: var(--bg-card-hover);
}
.display-toggle-item label {
  margin: 0;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
}

.settings-info { display:flex; flex-direction:column; gap:16px; }
.info-row {
  display:flex; justify-content:space-between; align-items:center;
  padding:12px 0; border-bottom:1px solid var(--border-light);
}
.info-row:last-child { border-bottom:none; }
.info-label { color:var(--text-dim); font-size:0.95rem; font-weight:500; }
.info-value { color:var(--text); font-weight:600; font-size:0.95rem; }

/* ===== 历史表格 ===== */
.history-table {
  width:100%; border-collapse:collapse; font-size:0.9rem;
  background:var(--bg-card); border-radius:var(--radius-sm);
  overflow:hidden;
}
.history-table th {
  text-align:left; padding:14px 16px; color:var(--text-dim); font-weight:600;
  border-bottom:2px solid var(--border); background:var(--bg-secondary);
  font-size:0.85rem; text-transform:uppercase; letter-spacing:0.5px;
}
.history-table td {
  padding:14px 16px; border-bottom:1px solid var(--border-light);
  color:var(--text);
}
.history-table tr:last-child td { border-bottom:none; }
.history-table tr:hover td { background:var(--bg-secondary); }

/* ===== 响应式 ===== */
@media (max-width:768px) {
  /* 导航栏 */
  .navbar {
    padding:14px 16px;
    flex-wrap:wrap;
    gap:8px;
  }
  .nav-brand {
    font-size:1.1rem;
    flex-shrink:0;
  }
  .nav-brand i {
    font-size:1.4rem;
  }
  .nav-actions {
    flex-wrap:wrap;
    gap:8px;
    align-items:center;
  }
  .last-update {
    font-size:0.75rem;
  }

  /* 统计栏（已移除）*/

  /* 容器和网格 */
  .container {
    padding:16px;
  }
  .channel-grid {
    grid-template-columns:1fr;
    gap:14px;
  }

  /* 渠道卡片 */
  .channel-card {
    padding:20px;
  }
  .card-name {
    font-size:1rem;
  }
  .card-url {
    font-size:0.75rem;
    padding:4px 8px;
  }
  .status-badge {
    padding:5px 12px;
    font-size:0.75rem;
  }
  .meta-row {
    font-size:0.8rem;
  }

  /* 健康进度条 */
  .health-bar {
    height:8px;
    gap:2px;
  }

  /* 按钮 */
  .btn {
    padding:10px 16px;
    font-size:0.85rem;
    white-space:nowrap;
  }
  .btn-sm {
    padding:6px 12px;
    font-size:0.8rem;
  }
  .btn i {
    font-size:1rem;
  }

  /* 弹窗 */
  .modal-content {
    width:95%;
    max-width:95vw;
  }
  .modal-header {
    padding:18px 16px;
  }
  .modal-header h3 {
    font-size:1.05rem;
  }
  .modal-body {
    padding:20px 16px;
  }
  .modal-footer {
    padding:16px;
    flex-wrap:wrap;
  }
  .modal-footer .btn {
    flex:1;
    min-width:120px;
    justify-content:center;
  }

  /* 表单 */
  .form-group label {
    font-size:0.85rem;
  }
  .form-group input {
    padding:10px 14px;
    font-size:0.9rem;
  }
  .form-row {
    grid-template-columns:1fr;
    gap:12px;
  }

  /* 管理员页面 */
  .admin-topbar {
    padding:12px 16px;
    flex-wrap:wrap;
    gap:10px;
  }
  .admin-topbar-left {
    gap:12px;
  }
  .admin-topbar-left h2 {
    font-size:1rem;
  }
  .admin-topbar-right {
    gap:10px;
  }
  .admin-user {
    font-size:0.8rem;
  }

  /* 侧边栏 */
  .admin-sidebar {
    width:60px;
    padding:12px 0;
  }
  .sidebar-item {
    padding:12px 8px;
    justify-content:center;
    font-size:0;
  }
  .sidebar-item i {
    font-size:1.3rem;
  }
  .sidebar-item span {
    display:none;
  }

  /* 内容区 */
  .admin-content {
    padding:20px 16px;
  }
  .admin-section-header {
    flex-direction:column;
    gap:12px;
    align-items:flex-start;
  }
  .admin-section-header h3 {
    font-size:1.1rem;
  }
  .admin-section-actions {
    width:100%;
  }
  .admin-section-actions .btn {
    flex:1;
  }

  /* 渠道列表 */
  .admin-channel-item {
    flex-direction:column;
    align-items:flex-start;
    padding:14px 16px;
    gap:12px;
  }
  .admin-ch-info {
    width:100%;
  }
  .admin-ch-name {
    font-size:0.95rem;
  }
  .admin-ch-url {
    font-size:0.75rem;
    word-break:break-all;
  }
  .admin-ch-actions {
    width:100%;
    justify-content:flex-end;
  }

  /* 设置卡片 */
  .settings-card {
    padding:20px 16px;
  }
  .settings-card h4 {
    font-size:1rem;
  }
  .settings-form {
    max-width:100%;
  }

  /* 历史表格 */
  .history-table {
    font-size:0.8rem;
    display:block;
    overflow-x:auto;
  }
  .history-table th,
  .history-table td {
    padding:10px 12px;
    white-space:nowrap;
  }
}

/* 更小屏幕优化 */
@media (max-width:480px) {
  .navbar {
    padding:10px 12px;
  }
  .nav-brand {
    font-size:0.95rem;
  }
  .nav-brand i {
    font-size:1.1rem;
  }
  .nav-actions {
    gap:6px;
  }
  .last-update {
    font-size:0.7rem;
  }
  .nav-actions .btn {
    padding:5px 8px;
    font-size:0.75rem;
  }

  /* 统计栏（已移除）*/

  .channel-card {
    padding:16px;
  }

  .btn {
    padding:8px 14px;
    font-size:0.8rem;
  }

  .modal-header h3 {
    font-size:0.95rem;
  }

  .admin-sidebar {
    width:50px;
  }
  .sidebar-item {
    padding:10px 6px;
  }
  .sidebar-item i {
    font-size:1.2rem;
  }

  .admin-content {
    padding:16px 12px;
  }
}