body {
    background-color: #f4f7f6;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
}

.control-panel {
    border-top: 4px solid #3273dc;
    height: 100%;
}

.box-shadow-lift {
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    border-radius: 8px;
    overflow: hidden;
}

.section-padding { padding: 3rem 0; }

.loader {
    border: 4px solid #e2e8f0;
    border-top: 4px solid #3273dc;
    border-radius: 50%;
    width: 50px; height: 50px;
    animation: spin 1s linear infinite;
}

@keyframes spin { 100% { transform: rotate(360deg); } }