* { box-sizing: border-box; }
body { margin: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: #f4f7f6; color: #333; line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 30px; }
header { margin-bottom: 30px; text-align: center; }
header h1 { margin-bottom: 5px; color: #2c3e50; }
header p { color: #7f8c8d; font-size: 1.1em; }

.grid-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media(max-width: 768px) { .grid-layout { grid-template-columns: 1fr; } }

.card { background: white; padding: 25px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
.card h2 { margin-top: 0; color: #34495e; border-bottom: 2px solid #ecf0f1; padding-bottom: 10px; }

.full-width { width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 4px; font-size: 15px; }
.mt-1 { margin-top: 5px; } .mt-2 { margin-top: 10px; } .mt-3 { margin-top: 15px; } .mt-4 { margin-top: 25px; }
.mb-3 { margin-bottom: 15px; } .ml-2 { margin-left: 10px; } .block { display: block; }

.import-tabs { display: flex; border-bottom: 2px solid #ecf0f1; margin-bottom: 15px; }
.tab-btn { flex: 1; background: none; border: none; padding: 10px; cursor: pointer; color: #7f8c8d; font-weight: bold; border-bottom: 3px solid transparent; }
.tab-btn.active { color: #3498db; border-bottom: 3px solid #3498db; }

.action-btn { padding: 10px 15px; border: none; border-radius: 4px; cursor: pointer; font-weight: bold; background: #95a5a6; color: white; }
.primary-btn { background: #3498db; color: white; }
.success-btn { background: #2ecc71; color: white; }
.large-btn { padding: 12px 24px; font-size: 16px; border: none; border-radius: 6px; cursor: pointer; font-weight: bold; }
button:disabled { background: #bdc3c7; cursor: not-allowed; }

.status-box { padding: 12px; background: #f8f9fa; border-left: 4px solid #95a5a6; border-radius: 4px; font-size: 14px; }
.center-content { text-align: center; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
.stat-box { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.05); text-align: center; border-bottom: 4px solid #3498db; }
.stat-box span { display: block; color: #7f8c8d; margin-bottom: 5px; font-weight: bold; }
.stat-box strong { font-size: 28px; color: #2c3e50; }
.stat-box.highlight { border-bottom-color: #2ecc71; background: #eafaf1; }
.stat-box.warning { border-bottom-color: #f39c12; }

.table-responsive { overflow-x: auto; margin-top: 15px; }
table { width: 100%; border-collapse: collapse; min-width: 1000px; }
th, td { border: 1px solid #ecf0f1; padding: 12px; text-align: left; }
th { background: #f8f9fa; color: #2c3e50; }
tbody tr:nth-child(even) { background: #fcfcfc; }