/* OS Selection Cards
====================================*/
.os-selection-cards {
    margin: 15px -7.5px 0;
}

.os-selection-cards .col-sm-6,
.os-selection-cards .col-md-4,
.os-selection-cards .col-lg-3 {
    padding: 7.5px;
    margin-bottom: 15px;
}

.os-card {
    position: relative;
    background: #fff;
    border: 2px solid #ddd;
    border-radius: 0;
    padding: 20px 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.os-card:hover {
    border-color: #e36b6b;
    box-shadow: 0 2px 8px rgba(227, 107, 107, 0.1);
    transform: translateY(-2px);
}

.os-card-selected {
    border-color: #e36b6b;
    background-color: #f0f4ff;
    box-shadow: 0 3px 12px rgba(227, 107, 107, 0.2);
}

.os-card-icon {
    margin-bottom: 15px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.os-card-icon img {
    max-width: 100%;
    max-height: 60px;
    object-fit: contain;
}

.os-card-name {
    font-size: 16px;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
}

.os-version-select {
    margin-top: 10px;
    font-size: 13px;
    border: 1px solid #ddd;
    border-radius: 0;
    padding: 5px 8px;
    background-color: #fff;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.os-version-select:focus {
    border-color: #e36b6b;
    outline: none;
    box-shadow: 0 0 0 2px rgba(227, 107, 107, 0.1);
}

.os-card-selected .os-version-select {
    border-color: #e36b6b;
}

.os-card-checkmark {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 24px;
    color: #e36b6b;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.os-card-selected .os-card-checkmark {
    opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 991px) {
    .os-selection-cards .col-md-4 {
        width: 50%;
    }
}

@media (max-width: 767px) {
    .os-selection-cards .col-sm-6 {
        width: 100%;
    }

    .os-card {
        min-height: 180px;
    }
}

/* Accessibility - keyboard focus */
.os-card:focus {
    outline: 2px solid #e36b6b;
    outline-offset: 2px;
}