/* CSS Variables - 深蓝灰专业风格 */
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-hover: #475569;
  --border-color: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #3b82f6;
  --accent-green: #22c55e;
  --accent-yellow: #f59e0b;
  --accent-red: #ef4444;
  --sidebar-width: 220px;
}

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

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

/* Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 20px 0;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-logo {
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.sidebar-logo h1 {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav li {
  margin: 4px 8px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.15s;
}

.sidebar-nav a:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-nav a.active {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 24px 32px;
  min-height: 100vh;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-title {
  font-size: 24px;
  font-weight: 600;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.card-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
}

.stat-value {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.stat-card.success .stat-value { color: var(--accent-green); }
.stat-card.warning .stat-value { color: var(--accent-yellow); }
.stat-card.danger .stat-value { color: var(--accent-red); }

/* Worker Cards */
.workers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.worker-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
}

.worker-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.worker-name {
  font-weight: 500;
}

.worker-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online { background: var(--accent-green); }
.status-dot.offline { background: var(--text-muted); }

.worker-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.worker-stat {
  font-size: 13px;
}

.worker-stat-value {
  font-weight: 600;
  margin-right: 4px;
}

.worker-current {
  font-size: 12px;
  color: var(--text-secondary);
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--accent-blue);
  color: white;
}

.btn-primary:hover {
  background: #0060df;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-hover);
}

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Tables */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
}

tr:hover {
  background: var(--bg-hover);
}

/* Status Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success { background: rgba(0, 200, 83, 0.15); color: var(--accent-green); }
.badge-warning { background: rgba(255, 179, 0, 0.15); color: var(--accent-yellow); }
.badge-danger { background: rgba(255, 68, 68, 0.15); color: var(--accent-red); }
.badge-info { background: rgba(0, 112, 243, 0.15); color: var(--accent-blue); }
.badge-muted { background: var(--bg-tertiary); color: var(--text-secondary); }

/* Forms */
textarea, input, select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
}

textarea:focus, input:focus, select:focus {
  outline: none;
  border-color: var(--accent-blue);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

/* Progress Bar */
.progress-bar {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
  transition: width 0.3s;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 12px 20px;
  border-radius: 8px;
  color: white;
  font-size: 14px;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s;
  z-index: 1000;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.success { background: var(--accent-green); }
.toast.error { background: var(--accent-red); }
.toast.info { background: var(--accent-blue); }

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  overflow: auto;
}

.modal-overlay.show {
  display: block;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  max-width: 800px;
  margin: 40px auto;
  max-height: 90vh;
  overflow: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: 16px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
}

.modal-body {
  padding: 20px;
}

/* Quality Stars */
.quality-stars {
  color: var(--accent-yellow);
  letter-spacing: 2px;
}

/* Activity Feed */
.activity-feed {
  max-height: 300px;
  overflow-y: auto;
}

.activity-item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
}

.activity-time {
  color: var(--text-muted);
  white-space: nowrap;
}

/* Filters */
.filters {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filters select, .filters input {
  width: auto;
  min-width: 150px;
}

/* Hidden pages */
.page {
  display: none;
}

.page.active {
  display: block;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 60px;
    padding: 10px 0;
  }

  .sidebar-logo h1 span,
  .sidebar-nav a span {
    display: none;
  }

  .main-content {
    margin-left: 60px;
    padding: 16px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}