.js-content-card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    max-width: 650px;
}

.js-form-group {
    margin-bottom: 25px;
}

.js-label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: #2c3e50;
}

#js-upload-input {
    width: 100%;
    padding: 15px;
    border: 2px dashed #dce4ec;
    border-radius: 6px;
    background: #fcfdfe;
    cursor: pointer;
}

#js-upload-input:hover {
    border-color: #3498db;
}

.js-hint {
    margin-top: 8px;
    font-size: 13px;
    color: #95a5a6;
}

.js-error-msg {
    color: #e74c3c;
    min-height: 20px;
    font-size: 14px;
    font-weight: 500;
}

#js-btn-start {
    width: 100%;
    padding: 14px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

#js-btn-start:hover {
    background-color: #2980b9;
}

#js-btn-start:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

.js-info-box {
    margin-top: 30px;
    max-width: 650px;
    background: #ebf5fb;
    padding: 20px;
    border-radius: 8px;
    color: #2980b9;
}

.js-info-box h3 {
    margin-top: 0;
    font-size: 16px;
}

.js-info-box ul {
    margin: 10px 0 0 0;
    padding-left: 20px;
    font-size: 14px;
    line-height: 1.8;
}