/* ============================================================
   DefectVision Platform - Shared Design System v2.0
   Unified styles for all pages: defectvision.rzpt.tech
   ============================================================ */

/* --- CSS Variables (Theme System) --- */
:root {
  --dv-bg: #f8fafc;
  --dv-surface: #ffffff;
  --dv-surface-hover: #f1f5f9;
  --dv-text: #1e293b;
  --dv-text-secondary: #64748b;
  --dv-text-muted: #94a3b8;
  --dv-border: #e2e8f0;
  --dv-border-light: #f1f5f9;
  --dv-accent: #2563eb;
  --dv-accent-light: #3b82f6;
  --dv-accent-soft: rgba(37,99,235,0.08);
  --dv-accent-glow: rgba(37,99,235,0.15);
  --dv-success: #16a34a;
  --dv-warning: #d97706;
  --dv-danger: #dc2626;
  --dv-danger-soft: #fef2f2;
  --dv-sidebar-bg: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  --dv-sidebar-text: rgba(255,255,255,0.65);
  --dv-sidebar-text-active: #ffffff;
  --dv-sidebar-border: rgba(255,255,255,0.08);
  --dv-sidebar-item-hover: rgba(255,255,255,0.06);
  --dv-sidebar-item-active: rgba(59,130,246,0.15);
  --dv-card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --dv-card-shadow-hover: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --dv-radius: 10px;
  --dv-radius-sm: 6px;
  --dv-radius-lg: 14px;
  --dv-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  background: var(--dv-bg);
  color: var(--dv-text);
  min-height: 100vh;
  display: flex;
  -webkit-font-smoothing: antialiased;
}

/* --- Sidebar --- */
.sidebar {
  width: 240px; height: 100vh;
  background: var(--dv-sidebar-bg);
  border-right: 1px solid var(--dv-sidebar-border);
  position: fixed; left: 0; top: 0;
  overflow-y: auto; flex-shrink: 0; z-index: 100;
  transition: transform 0.25s ease;
}
.nav-header {
  padding: 22px 18px;
  border-bottom: 1px solid var(--dv-sidebar-border);
}
.app-title {
  font-size: 17px; font-weight: 700;
  color: #fff; margin: 0 0 3px 0;
  letter-spacing: -0.2px;
}
.app-version { font-size: 11px; color: rgba(255,255,255,0.4); }
.nav-menu { list-style: none; padding: 8px 0; margin: 0; }
.nav-group { margin: 6px 0 2px 0; }
.nav-group-title {
  padding: 8px 18px; font-size: 11px;
  font-weight: 600; color: rgba(255,255,255,0.3);
  text-transform: uppercase; letter-spacing: 1px;
}
.nav-link {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 18px; margin: 1px 10px;
  color: var(--dv-sidebar-text); text-decoration: none;
  font-size: 13.5px; font-weight: 500;
  border-radius: var(--dv-radius-sm);
  transition: all var(--dv-transition);
}
.nav-link:hover {
  background: var(--dv-sidebar-item-hover);
  color: rgba(255,255,255,0.85);
}
.nav-item.active .nav-link {
  background: var(--dv-sidebar-item-active);
  color: var(--dv-sidebar-text-active);
  box-shadow: 0 0 12px var(--dv-accent-glow);
}
.nav-icon { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.75; }
.nav-item.active .nav-icon { opacity: 1; color: var(--dv-accent-light); }

/* --- Main Content --- */
.main-content {
  margin-left: 240px; flex: 1; padding: 28px;
  min-height: 100vh;
  transition: margin-left 0.25s ease;
}
.page-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px; gap: 16px;
}
.page-title { font-size: 22px; font-weight: 700; color: var(--dv-text); letter-spacing: -0.3px; }
.page-subtitle { font-size: 13px; color: var(--dv-text-muted); margin-top: 2px; }

/* --- Cards --- */
.card {
  background: var(--dv-surface);
  border: 1px solid var(--dv-border);
  border-radius: var(--dv-radius);
  box-shadow: var(--dv-card-shadow);
  transition: box-shadow var(--dv-transition), transform var(--dv-transition);
  overflow: hidden;
}
.card:hover { box-shadow: var(--dv-card-shadow-hover); }
.card-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 20px; border-bottom: 1px solid var(--dv-border-light);
  font-weight: 600; font-size: 15px;
}
.card-body { padding: 20px; }

/* --- Stat Cards --- */
.stat-card {
  background: var(--dv-surface);
  border: 1px solid var(--dv-border);
  border-radius: var(--dv-radius);
  padding: 20px; cursor: default;
  transition: all var(--dv-transition);
  box-shadow: var(--dv-card-shadow);
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--dv-card-shadow-hover);
}
.stat-icon {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px; color: #fff;
}
.stat-icon.blue { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.stat-icon.green { background: linear-gradient(135deg, #22c55e, #16a34a); }
.stat-icon.orange { background: linear-gradient(135deg, #f59e0b, #d97706); }
.stat-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.stat-icon.red { background: linear-gradient(135deg, #ef4444, #dc2626); }
.stat-value { font-size: 28px; font-weight: 700; color: var(--dv-text); line-height: 1.2; }
.stat-label { font-size: 13px; color: var(--dv-text-secondary); margin-top: 4px; }
.stat-change { font-size: 12px; font-weight: 600; margin-top: 4px; }
.stat-change.up { color: var(--dv-success); }
.stat-change.down { color: var(--dv-danger); }

/* --- Charts --- */
.chart-container {
  background: var(--dv-surface);
  border: 1px solid var(--dv-border);
  border-radius: var(--dv-radius);
  padding: 16px;
  box-shadow: var(--dv-card-shadow);
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border: none; border-radius: var(--dv-radius-sm);
  font-size: 13px; font-weight: 500; cursor: pointer;
  transition: all var(--dv-transition); text-decoration: none;
  white-space: nowrap; line-height: 1.4;
}
.btn-primary {
  background: var(--dv-accent); color: #fff;
  box-shadow: 0 1px 2px rgba(37,99,235,0.3);
}
.btn-primary:hover { background: #1d4ed8; box-shadow: 0 2px 8px rgba(37,99,235,0.4); }
.btn-primary:active { transform: scale(0.97); }
.btn-danger { background: var(--dv-danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-outline {
  background: transparent; color: var(--dv-text-secondary);
  border: 1px solid var(--dv-border);
}
.btn-outline:hover { background: var(--dv-surface-hover); border-color: var(--dv-accent); color: var(--dv-accent); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 10px 24px; font-size: 15px; }
.btn-primary:disabled, .btn-primary.active-page {
  background: var(--dv-accent-soft); color: var(--dv-accent);
  cursor: default; box-shadow: none; pointer-events: none;
}

/* --- Badges --- */
.badge {
  display: inline-block; padding: 3px 10px;
  font-size: 11px; font-weight: 600; border-radius: 20px;
  letter-spacing: 0.3px;
}
.badge-success { background: #dcfce7; color: #15803d; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fef2f2; color: #b91c1c; }
.badge-info { background: #dbeafe; color: #1d4ed8; }

/* --- Tables --- */
.data-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.data-table thead { background: var(--dv-surface-hover); }
.data-table th {
  padding: 10px 14px; text-align: left;
  font-weight: 600; color: var(--dv-text-secondary);
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.3px;
  border-bottom: 2px solid var(--dv-border);
}
.data-table td {
  padding: 10px 14px; border-bottom: 1px solid var(--dv-border-light);
}
.data-table tbody tr { transition: background var(--dv-transition); }
.data-table tbody tr:hover { background: var(--dv-accent-soft); }
.table-container {
  background: var(--dv-surface);
  border: 1px solid var(--dv-border);
  border-radius: var(--dv-radius);
  overflow: hidden;
  box-shadow: var(--dv-card-shadow);
}

/* --- Forms --- */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--dv-text-secondary); margin-bottom: 6px;
}
.form-control {
  width: 100%; padding: 9px 12px;
  border: 1px solid var(--dv-border); border-radius: var(--dv-radius-sm);
  font-size: 13px; color: var(--dv-text);
  background: var(--dv-surface);
  transition: border-color var(--dv-transition), box-shadow var(--dv-transition);
  outline: none;
}
.form-control:focus {
  border-color: var(--dv-accent);
  box-shadow: 0 0 0 3px var(--dv-accent-soft);
}

/* --- Grid --- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }

/* --- Flex Utilities --- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-20 { gap: 20px; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }

/* --- Spacing --- */
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.p-16 { padding: 16px; }
.p-20 { padding: 20px; }

/* --- Empty State --- */
.empty-state {
  text-align: center; padding: 48px 24px; color: var(--dv-text-muted);
}
.empty-state svg { opacity: 0.3; margin-bottom: 12px; }

/* --- Hamburger --- */
.hamburger {
  display: none; position: fixed; top: 12px; left: 12px; z-index: 110;
  background: var(--dv-surface); border: 1px solid var(--dv-border);
  border-radius: var(--dv-radius-sm); padding: 8px 10px; cursor: pointer;
  box-shadow: var(--dv-card-shadow);
}
.hamburger span {
  display: block; width: 20px; height: 2px;
  background: var(--dv-text); margin: 4px 0;
  transition: all var(--dv-transition);
}

/* --- Skeleton Loading --- */
@keyframes shimmer {
  0% { background-position: -200px 0; }
  100% { background-position: 200px 0; }
}
.skeleton {
  background: linear-gradient(90deg, var(--dv-border-light) 25%, var(--dv-surface-hover) 50%, var(--dv-border-light) 75%);
  background-size: 400px 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--dv-radius-sm);
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: 4px 0 20px rgba(0,0,0,0.3);
  }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; padding: 16px; }
  .hamburger { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .col-span-2, .col-span-3 { grid-column: span 1; }
  .stat-value { font-size: 24px; }
  .stat-card { padding: 16px; }
  .page-title { font-size: 18px; }
}
@media (max-width: 480px) {
  .stat-card { padding: 14px; }
  .stat-value { font-size: 22px; }
  .page-header { flex-direction: column; align-items: flex-start; }
}