:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.login-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    max-width: 450px;
    width: 100%;
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.login-header h2 {
    margin: 0;
    font-size: 28px;
    font-weight: 600;
}

.login-header p {
    margin: 10px 0 0 0;
    opacity: 0.9;
}

.login-body {
    padding: 40px;
}

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

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 12px;
    font-weight: 600;
    transition: transform 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.dashboard-container {
    background: white;
    flex: 1;
}

.dashboard-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 0;
    margin-bottom: 30px;
}

.upload-section {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
}

.upload-box {
    border: 2px dashed #667eea;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    background: white;
    transition: all 0.3s;
}

.upload-box:hover {
    border-color: #764ba2;
    background: #f8f9fa;
}

.upload-box i {
    font-size: 48px;
    color: #667eea;
    margin-bottom: 15px;
}

.result-card {
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.result-header {
    padding: 20px;
    color: white;
    font-weight: 600;
}

.result-body {
    padding: 20px;
    background: white;
}

.alert {
    border-radius: 10px;
    border: none;
}

.table {
    margin-bottom: 0;
}

.badge {
    padding: 6px 12px;
    font-weight: 500;
}

footer {
    margin-top: auto;
}

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.stat-card h3 {
    font-size: 36px;
    font-weight: bold;
    margin: 10px 0;
}

.stat-card p {
    color: #6c757d;
    margin: 0;
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.loading.active {
    display: block;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
}