body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.consent-card, .survey-card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    max-width: 700px;
    width: 100%;
}

.progress {
    border-radius: 10px;
    background-color: #e9ecef;
    overflow: hidden;
}

.progress-bar {
    transition: width 0.5s ease;
    border-radius: 10px;
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-left {
    animation: slideLeft 0.4s ease-in;
}

@keyframes slideLeft {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-right {
    animation: slideRight 0.4s ease-in;
}

@keyframes slideRight {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

.form-check {
    padding-left: 2em;
}

.form-check-input:checked {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.rating-group .form-check {
    padding: 10px 15px;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    margin-bottom: 8px;
    transition: all 0.2s;
    cursor: pointer;
}

.rating-group .form-check:hover {
    background-color: #f8f9fa;
    border-color: #0d6efd;
}

.rating-group .form-check-input:checked + .form-check-label {
    font-weight: bold;
    color: #0d6efd;
}

.checkbox-group .form-check {
    padding: 8px 12px;
    border: 1px solid #e9ecef;
    border-radius: 6px;
    margin-bottom: 5px;
    transition: all 0.2s;
}

.checkbox-group .form-check:hover {
    background-color: #f0f7ff;
    border-color: #0d6efd;
}

.card-title {
    color: #2c3e50;
    font-weight: 600;
}

.btn-lg {
    padding: 12px 30px;
    border-radius: 10px;
    font-weight: 600;
}

@media (max-width: 576px) {
    .consent-card, .survey-card {
        margin: 10px;
    }
    .card-body {
        padding: 1.5rem !important;
    }
    .display-4 {
        font-size: 2rem;
    }
    .display-5 {
        font-size: 1.5rem;
    }
}