body {
    font-family: sans-serif;
    margin: 0;
}
.main-container {
    margin-left: 250px; /* Default for desktop with sidebar */
    padding: 20px;
}

.progressbar {
    position: relative;
    display: flex;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 50px;
}

.progressbar::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: #e0e0e0;
    transform: translateY(-50%);
    z-index: 1;
}

.progress {
    position: absolute;
    top: 50%;
    left: 0;
    width: 0%;
    height: 3px;
    background-color: #8c8c8c;
    transform: translateY(-50%);
    z-index: 2;
    transition: width 0.4s ease-in-out;
}

.progress-step {
    width: 80px;
    height: 80px;
    background-color: #fff;
    border: 3px solid #e0e0e0;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 3;
    transition: border-color 0.4s ease-in-out;
}

.progress-step i {
    font-size: 40px;
    color: #e0e0e0;
    transition: color 0.4s ease-in-out;
}

.progress-step.active {
    border-color: #8c8c8c;
}

.progress-step.active i {
    color: #8c8c8c;
}

.progress-step::after {
    content: attr(data-title);
    position: absolute;
    top: calc(100% + 10px);
    width: 120px;
    text-align: center;
    color: #555;
    font-size: 14px;
}

.buttons {
    margin-top: 30px;
    text-align: center;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: #8c8c8c;
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

.btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.btn:hover:not(:disabled) {
    background-color: #6a6a6a;
}