body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
    background: #999;
}

.top-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    background: #007bff;
    padding: 15px;
    position: relative;
}

.back-arrow {
    position: absolute;
    left: 20px;
    font-size: 26px;
    color: #fff;
    cursor: pointer;
}

.heading {
    color: #fff;
    font-size: 28px;
    margin: 0;
}

.green-line {
    height: 12px;
    background: linear-gradient(90deg, #0aff6c, #00c94a);
}

.container {
    background: #fff;
    width: 420px;
    max-width: 95%;
    margin: 40px auto;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

.file-group {
    margin-bottom: 14px;
}

input[type="file"] {
    display: none;
}

.file-label {
    display: inline-block;
    padding: 10px 20px;
    border: 2px solid #007bff;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

.file-label.selected {
    border-color: #0aa84f;
    color: #0aa84f;
}

.status {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    font-weight: bold;
    color: #999;
}

.status.selected {
    color: #0aa84f;
}

button {
    margin-top: 20px;
    padding: 10px 25px;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
}

button:hover {
    background: #0056b3;
}