.bg-conference {background-image: url('../images/bg_main.jpg'); background-repeat: no-repeat;background-position: center top; background-size: 100%;}

.main-top h1 {padding-bottom: 1.6rem;}
.main-top .title-sub {font-size: 40px; line-height: 1.3; font-weight: 500; padding-bottom: 1.5rem; background-image: linear-gradient(90deg,rgba(0,0,0,0.00) 0%,rgba(0,0,0,0.40) 24.35%,rgba(0,0,0,0.50) 79.27%,rgba(0,0,0,0.00) 100%); margin-bottom: 2rem;}
.main-top h1.display-5 {padding-bottom: 0;}
.main-top.sub .fw-normal {font-weight: 600 !important; line-height: 1.3;}
.main-top .date span {padding-top: 0.4rem; padding-left: 0; font-size: 1.3rem;}
.main-top .date span::before {display: none;}
.text-white {text-shadow: 0 0 30px rgba(3, 31, 91, 0.8);}

.opacity-light {opacity: 0.6 !important;}
.main-top.sub h3 {font-size: 31px !important;}


@media (min-width: 769px) { 

    /* .bg-conference {background-size: 350%; background-position: 60% top;} */
    .bg-conference.m-support {position: relative; height: 100vh; background-size: cover; background-position: 90% top; }
    .bg-conference.m-support .gradation{position: absolute; width: 100%; background: linear-gradient(to bottom, rgba(0,0,0,0.3) 100%, rgba(255,255,255,0) 0); height:  100vh;}

    .m-support-button {position: absolute; width: 100%; z-index: 1000; text-align: center;}
    .m-support-button h1 {padding-top: 2rem; padding-bottom: 4.5rem;}
    .m-support-button h1 img {width: 10%;}
    .m-support-button h2 {font-weight: 700; color: #fff; font-size: 2.9rem; letter-spacing: -0.03rem;}
    .m-support-button h3 {padding-top: 1rem; font-weight: 700; color: #fff; font-size: 2.55rem !important; line-height: 1.4; letter-spacing: -0.03rem; word-break: keep-all;}

    .pres-data a {width: 28%; margin: 0 0 1rem 0; padding: 1.2rem 0; border-radius: 10px; border: none; background-color: #ffffff; color: #2546c1; font-size: 1.3rem; font-weight: 600; text-decoration: none; }
    .attend-certi button {width: 28%; margin: 0 0 0 0; padding: 1.2rem 0; border-radius: 10px; border: none; background-color: #2546c1; color: #ffffff; font-size: 1.3rem; font-weight: 600;  }


}



@media (min-width: 769px) and (max-width: 1300px) { 
    .m-support-button h1 img {width: 15%;}
}




@media (max-width: 767.98px) { 

    .bg-conference {background-size: 350%; background-position: 60% top;}
    .bg-conference.m-support {position: relative; height: 100vh; background-size: cover; background-position: 90% top; }
    .bg-conference.m-support .gradation{position: absolute; width: 100%; background: linear-gradient(to bottom, rgba(0,0,0,0.3) 100%, rgba(255,255,255,0) 0); height:  100vh;}

    .m-support-button {position: absolute; width: 100%; z-index: 1000; text-align: center;}
    .m-support-button h1 {padding-top: 1rem; padding-bottom: 2.5rem;}
    .m-support-button h1 img {width: 30%;}
    .m-support-button h2 {font-weight: 700; color: #fff; font-size: 1.9rem; letter-spacing: -0.03rem;}
    .m-support-button h3 {padding-top: 1rem; font-weight: 700; color: #fff; font-size: 1.55rem !important; line-height: 1.4; letter-spacing: -0.03rem; word-break: keep-all;}

    .pres-data a {width: 70%; margin: 3rem 0 1rem 0; padding: 1.2rem 0; border-radius: 10px; border: none; background-color: #ffffff; color: #2546c1; font-size: 1.3rem; font-weight: 600; text-decoration: none; }
    .attend-certi button {width: 70%; margin: 3rem 0 0 0; padding: 1.2rem 0; border-radius: 10px; border: none; background-color: #2546c1; color: #ffffff; font-size: 1.3rem; font-weight: 600;  }

}