/* Modern Dashboard CSS */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

.sidebar {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.8);
    padding: 12px 20px;
    margin: 4px 0;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover {
    color: white;
    background-color: rgba(255,255,255,0.1);
    transform: translateX(5px);
}

.sidebar .nav-link.active {
    background-color: rgba(255,255,255,0.2);
    color: white;
    font-weight: 600;
}

.main-content {
    padding: 20px;
}

.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px 15px 0 0 !important;
    border: none;
}

.stats-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
}

.stats-card h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
}

.stats-card p {
    margin: 0;
    opacity: 0.9;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 600;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

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

.login-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.login-card h2 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

.form-control {
    border-radius: 8px;
    border: 2px solid #e9ecef;
    padding: 12px 15px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.table {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.table thead th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    font-weight: 600;
}

.badge {
    border-radius: 20px;
    padding: 8px 12px;
    font-weight: 600;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
        position: relative;
    }
    
    .main-content {
        padding: 10px;
    }
    
    .stats-card h3 {
        font-size: 2rem;
    }
    
    .login-card {
        margin: 20px;
        padding: 30px;
    }
}

/* Plotly Chart Container */
.chart-container {
    background: white;
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* File Upload Styling */
.file-upload {
    border: 2px dashed #667eea;
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    background-color: #f8f9fa;
    transition: all 0.3s ease;
}

.file-upload:hover {
    border-color: #764ba2;
    background-color: #e9ecef;
}

/* Alert Styling */
.alert {
    border-radius: 10px;
    border: none;
    padding: 15px 20px;
}

/* Loading Spinner */
.spinner-border {
    color: #667eea;
}