:root {
    --primary: #4f46e5;
    --primary-light: #818cf8;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
}

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

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

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: var(--card);
    border-radius: 16px;
    padding: 48px 40px;
    width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.login-card h1 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 24px;
    color: var(--text);
}

.login-card .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
    color: var(--text);
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
    outline: none;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    gap: 6px;
}

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

.btn-primary:hover { background: #4338ca; }

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #059669; }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; }

.btn-sm { padding: 6px 12px; font-size: 12px; }

.btn-block { width: 100%; }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

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

.sidebar {
    width: 240px;
    background: #1e293b;
    color: white;
    padding: 20px 0;
    flex-shrink: 0;
}

.sidebar .logo {
    padding: 0 20px 20px;
    font-size: 18px;
    font-weight: 700;
    border-bottom: 1px solid #334155;
    margin-bottom: 12px;
}

.sidebar .user-info {
    padding: 12px 20px;
    font-size: 13px;
    color: #94a3b8;
    border-bottom: 1px solid #334155;
    margin-bottom: 12px;
}

.sidebar nav a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
    gap: 10px;
}

.sidebar nav a:hover, .sidebar nav a.active {
    background: #334155;
    color: white;
}

.main-content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

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

.page-header h2 {
    font-size: 22px;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.stat-card .label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
}

.stat-card.total .value { color: var(--info); }
.stat-card.pending .value { color: var(--warning); }
.stat-card.success .value { color: var(--success); }
.stat-card.failed .value { color: var(--danger); }

.card {
    background: var(--card);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    margin-bottom: 24px;
}

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

.card-body { padding: 20px; }

.toolbar {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.toolbar input, .toolbar select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    outline: none;
}

.toolbar input:focus, .toolbar select:focus {
    border-color: var(--primary);
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th, table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

table th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table tr:hover td { background: #f8fafc; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 16px;
}

.pagination button {
    padding: 6px 14px;
    border: 1px solid var(--border);
    background: white;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
}

.pagination button:hover { background: #f1f5f9; }
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }
.pagination span { font-size: 13px; color: var(--text-secondary); }

.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: white;
    border-radius: 12px;
    padding: 24px;
    width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.modal h3 { margin-bottom: 16px; }
.modal h4 { font-size: 14px; color: var(--text-secondary); }

.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 180px; }
.modal table th, .modal table td { padding: 8px 10px; font-size: 12px; }
.modal table input, .modal table select { width: 100%; padding: 6px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 12px; outline: none; }

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.detail-item {
    padding: 8px 0;
}

.detail-item .label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.detail-item .value {
    font-size: 14px;
    font-weight: 500;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    color: white;
    font-size: 14px;
    z-index: 2000;
    animation: slideIn 0.3s ease;
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.upload-result-box {
    margin: 4px 0 14px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: 8px;
    background: #f8fafc;
    font-size: 14px;
}

.upload-result-box ul {
    font-size: 13px;
    color: var(--danger);
}

table input[type="checkbox"],
.toolbar input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary);
}

@media (max-width: 768px) {
    .sidebar { display: none; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .detail-grid { grid-template-columns: 1fr; }
    .modal { width: 95%; }
}