.hero_banner {
    margin-bottom: 190px;
    padding-bottom: 40px;
    border-bottom: 40px solid #F1F1F1;;
}
#welcome_tech_section {
    background: url(../img/red-white-arrow.png) no-repeat 0% -40%, url(../img/red-white-arrow.png) no-repeat right 200%;
    background-color: #cf2030;
    background-size: 320px;
    padding: 40px 0px;
}

#welcome_tech_section .col {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    position: relative;
}

#welcome_tech_section h3{
    text-align: center;
    font-size: 70px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    letter-spacing: 0.25px;
    margin: 120px 0px;
}
#welcome_tech_section h3,#welcome_tech_section p {
    color: #ffffff;
}
#welcome_tech_section p {
    text-align: center;
    font-size: 30px;
    font-style: normal;
    font-weight: 500;
    line-height: normal;
    letter-spacing: 0.25px;
    position: absolute;
    bottom: 0px;
    margin-bottom: 0;
}

section#agenda_section {
    margin: 190px 0;
}

section#agenda_section h4,
section#gallery_section h4 {
    color: #000;
    font-family: Helvetica Neue;
    font-size: 70px;
    font-style: normal;
    font-weight: 500;
    line-height: normal;
    letter-spacing: 0.25px;
    text-align: center;
    margin-bottom: 85px;
}

.day_number{
    color: #CF2030;
    font-family: Courier New;
    font-size: 50px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    letter-spacing: 0.25px;
    text-align: right;
}

.day_detail {
    color: #000;
    font-family: Courier New;
    font-size: 26px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    letter-spacing: 0.25px;

}

.duration_time {
    color: #000;
    font-family: Courier New;
    font-size: 20px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    letter-spacing: 0.25px;
    text-align: right;
    margin-right: 20px;
}
.duration_detail {
    color: #000;
    font-family: Courier New;
    font-size: 20px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    letter-spacing: 0.25px;
}
button.accordion-button {
    display: block;
}
.duration_block{
    margin-bottom: 10px;
}
.accordion-button::after {
    z-index: 999;
    position: absolute;
    right: 20px;
    top: 32px;
    background-size: 32px;
    height: 32px;
    width: 32px;
}
button.accordion-button {
    box-shadow: none !important;
}
header#masthead {
    background: #cf2030;
    border-bottom: 0;
    box-shadow: none;
}
@media only screen and (max-width: 1200px) {
    .hero_banner {
        margin-bottom: 120px;
    }
}

@media only screen and (max-width: 992px) {
    .hero_banner {
        margin-bottom: 100px;
    }
    #welcome_tech_section h3 {
        font-size: 50px;
    }
    #welcome_tech_section p {
        font-size: 26px;
    }
    #welcome_tech_section {
        background: url(../img/red-white-arrow.png) no-repeat 0% -25%, url(../img/red-white-arrow.png) no-repeat right 145%, #CF2030;
        background-size: 220px;
    }
}

@media only screen and (max-width: 767px) {
    section#agenda_section h4,
    section#gallery_section h4{
        font-size: 36px;
    }
    .hero_banner {
        margin-bottom: 60px;
    }
    #welcome_tech_section h3 {
        font-size: 40px;
    }
    #welcome_tech_section p {
        font-size: 22px;
    }
    #welcome_tech_section {
        background: url(../img/red-white-arrow.png) no-repeat 0% -25%, url(../img/red-white-arrow.png) no-repeat right 145%, #CF2030;
        background-size: 200px;
    }
    .day_number {
        font-size: 40px;
    }
    .day_detail {
        font-size: 18px;
    }
    .duration_time, .duration_detail {
        font-size: 16px;
    }
    .duration_block {
        margin-bottom: 10px;
        border-bottom: 1px solid #e5e5e5;
        padding-bottom: 10px;
    }
    button.accordion-button,
    .accordion-body {
        padding-left: 0;
        padding-right: 0;
    }
    .accordion-body .duration_block:last-child {
        margin-bottom: 0 !important;
        padding-bottom: 0;
        border-bottom: 0;
    }
    .accordion-button::after {
        right: 10px;
        top: 26px;
        background-size: 25px;
        height: 25px;
        width: 25px;
    }
    section#agenda_section {
        margin: 80px 0;
    }

}
@media only screen and (max-width: 576px) {
    #welcome_tech_section h3 {
        font-size: 30px;
    }
    #welcome_tech_section p {
        font-size: 16px;
    }
    .day_number {
        font-size: 20px;
    }
    .day_detail {
        font-size: 16px;
    }
    .duration_time, .duration_detail {
        font-size: 14px;
    }
    button.accordion-button,
    .accordion-body {
        padding-left: 0;
        padding-right: 0;
    }
    .accordion-button::after {
        right: 5px;
        top: 25px;
        background-size: 20px;
        height: 20px;
        width: 20px;
    }
    button.accordion-button {
        padding-right: 25px;
    }
}