/* ===========================================
   WALLVOICE24BD
   AUTHORS PAGE
=========================================== */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html{
    scroll-behavior:smooth;
}

body{

    font-family:"Poppins",sans-serif;

    background:#090909;

    color:#fff;

    overflow-x:hidden;

    line-height:1.8;

}

/* ===========================================
        SCROLLBAR
=========================================== */

::-webkit-scrollbar{

    width:10px;

}

::-webkit-scrollbar-track{

    background:#111;

}

::-webkit-scrollbar-thumb{

    background:#d10000;

    border-radius:50px;

}

/* ===========================================
        NAVBAR
=========================================== */

.navbar{

    position:fixed;

    top:0;

    left:0;

    width:100%;

    padding:22px 70px;

    display:flex;

    justify-content:space-between;

    align-items:center;

    background:rgba(0,0,0,.75);

    backdrop-filter:blur(12px);

    z-index:9999;

    border-bottom:1px solid rgba(255,255,255,.08);

}

.logo{

    font-size:34px;

    font-weight:800;

    letter-spacing:1px;

}

.logo span{

    color:#d10000;

}

.navbar ul{

    display:flex;

    list-style:none;

    gap:40px;

}

.navbar ul li{

    list-style:none;

}

.navbar ul li a{

    color:white;

    text-decoration:none;

    font-weight:500;

    transition:.35s;

    position:relative;

}

.navbar ul li a:hover{

    color:#ff3b3b;

}

.navbar ul li a.active{

    color:#ff2a2a;

}

.navbar ul li a.active::after{

    content:"";

    position:absolute;

    bottom:-8px;

    left:0;

    width:100%;

    height:2px;

    background:#ff2a2a;

}

/* ===========================================
        HERO
=========================================== */

.hero{

    position:relative;

    min-height:100vh;

    display:flex;

    justify-content:center;

    align-items:center;

    text-align:center;

    overflow:hidden;

    background:url("LandingPageImages/about-hero.png");

    background-size:cover;

    background-position:center;

    background-repeat:no-repeat;

}

.hero::before{

    content:"";

    position:absolute;

    inset:0;

    background:rgba(0,0,0,.35);

    backdrop-filter:blur(4px);

}

.overlay{

    position:absolute;

    inset:0;

    background:linear-gradient(

        rgba(0,0,0,.25),

        rgba(0,0,0,.82)

    );

}

.hero-content{

    position:relative;

    z-index:2;

    max-width:900px;

    padding:40px;

}

.hero-content h1{

    font-size:82px;

    font-weight:800;

    margin-bottom:25px;

    line-height:1.1;

}

.hero-content p{

    font-size:22px;

    color:#d7d7d7;

    margin-bottom:40px;

}

/* ===========================================
        BUTTON
=========================================== */

.hero-btn,

.dataset-btn{

    display:inline-block;

    padding:18px 42px;

    background:#d10000;

    color:white;

    text-decoration:none;

    border-radius:8px;

    transition:.35s;

    font-weight:600;

    letter-spacing:.5px;

}

.hero-btn:hover,

.dataset-btn:hover{

    transform:translateY(-5px);

    background:#ff1b1b;

    box-shadow:0 10px 25px rgba(255,0,0,.35);

}

/* ===========================================
        COMMON SECTION
=========================================== */

section{

    padding:100px 8%;

}

.section-title{

    text-align:center;

    margin-bottom:70px;

}

.section-title h2{

    font-size:48px;

    margin-bottom:15px;

    font-weight:700;

}

.section-title p{

    max-width:750px;

    margin:auto;

    color:#bbbbbb;

    font-size:18px;

}

/* ===========================================
        SECTION DIVIDER
=========================================== */

section:nth-child(even){

    background:#111;

}


/* ===========================================
        AUTHOR SECTION
=========================================== */

.author-section{

    display:grid;

    grid-template-columns:450px 1fr;

    gap:70px;

    align-items:center;

    margin:80px 0;

}

.author-section.reverse{

    grid-template-columns:1fr 450px;

}

.author-image{

    position:relative;

}

.author-image img{

    width:100%;

    border-radius:20px;

    display:block;

    transition:.5s;

    border:4px solid rgba(255,255,255,.06);

    box-shadow:
    0 20px 60px rgba(0,0,0,.55),
    0 0 40px rgba(255,0,0,.15);

}

.author-image img:hover{

    transform:translateY(-10px) scale(1.02);

    box-shadow:
    0 25px 70px rgba(0,0,0,.65),
    0 0 50px rgba(255,0,0,.25);

}

.author-content{

    max-width:760px;

}

.author-tag{

    display:inline-block;

    padding:8px 18px;

    border-radius:50px;

    background:#d10000;

    font-size:14px;

    font-weight:600;

    margin-bottom:18px;

    letter-spacing:1px;

    text-transform:uppercase;

}

.author-content h2{

    font-size:56px;

    margin-bottom:10px;

    line-height:1.1;

}

.author-content h3{

    color:#ff4d4d;

    font-size:22px;

    margin-bottom:30px;

    font-weight:500;

}

.author-content p{

    color:#cfcfcf;

    font-size:18px;

    margin-bottom:24px;

    text-align:justify;

}

/* ===========================================
        TIMELINE
=========================================== */

.timeline-section{

    position:relative;

}

.timeline{

    position:relative;

    max-width:950px;

    margin:auto;

    padding-left:40px;

}

.timeline::before{

    content:"";

    position:absolute;

    left:70px;

    top:0;

    width:4px;

    height:100%;

    background:#d10000;

}

.timeline-item{

    position:relative;

    display:flex;

    align-items:flex-start;

    margin-bottom:60px;

}

.year{

    min-width:90px;

    height:90px;

    border-radius:50%;

    background:#d10000;

    display:flex;

    justify-content:center;

    align-items:center;

    font-weight:700;

    font-size:22px;

    color:#fff;

    box-shadow:0 0 25px rgba(255,0,0,.35);

    z-index:2;

}

.timeline-content{

    margin-left:40px;

    background:#151515;

    padding:28px;

    border-radius:16px;

    flex:1;

    transition:.35s;

    border:1px solid rgba(255,255,255,.05);

}

.timeline-content:hover{

    transform:translateY(-6px);

    box-shadow:0 12px 30px rgba(255,0,0,.12);

}

.timeline-content h3{

    color:#fff;

    margin-bottom:12px;

    font-size:24px;

}

.timeline-content p{

    color:#c9c9c9;

    font-size:17px;

}

/* ===========================================
        HIGHLIGHTS
=========================================== */

.highlight-grid{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(260px,1fr));

    gap:28px;

}

.highlight-card{

    background:#151515;

    border-radius:18px;

    padding:40px 30px;

    text-align:center;

    transition:.35s;

    border:1px solid rgba(255,255,255,.06);

}

.highlight-card:hover{

    transform:translateY(-8px);

    border-color:#d10000;

    box-shadow:0 15px 35px rgba(255,0,0,.18);

}

.highlight-card i{

    font-size:48px;

    color:#d10000;

    margin-bottom:22px;

}

.highlight-card h3{

    font-size:24px;

    margin-bottom:16px;

}

.highlight-card p{

    color:#cfcfcf;

    font-size:16px;

    line-height:1.8;

}

/* ===========================================
        PUBLICATIONS
=========================================== */

.publication-list{

    display:flex;

    flex-direction:column;

    gap:22px;

}

.publication{

    background:#141414;

    padding:28px 32px;

    border-left:5px solid #d10000;

    border-radius:12px;

    transition:.35s;

}

.publication:hover{

    transform:translateX(10px);

    background:#1a1a1a;

}

.publication h3{

    font-size:22px;

    font-weight:500;

    color:#f2f2f2;

}



/* ===========================================
        STATISTICS
=========================================== */

.statistics{

    background:#0d0d0d;

}

.stats-grid{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));

    gap:30px;

}

.stat{

    background:#161616;

    padding:45px 30px;

    border-radius:18px;

    text-align:center;

    transition:.35s;

    border:1px solid rgba(255,255,255,.05);

}

.stat:hover{

    transform:translateY(-10px);

    border-color:#d10000;

    box-shadow:0 18px 35px rgba(255,0,0,.18);

}

.stat h3{

    font-size:58px;

    color:#d10000;

    margin-bottom:12px;

    font-weight:700;

}

.stat p{

    color:#d5d5d5;

    font-size:18px;

}

/* ===========================================
        COLLABORATION
=========================================== */

.collaboration{

    background:#111;

}

.collaboration-wrapper{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(320px,1fr));

    gap:35px;

}

.collaboration-card{

    background:#181818;

    padding:45px;

    border-radius:20px;

    text-align:center;

    transition:.35s;

    border:1px solid rgba(255,255,255,.05);

}

.collaboration-card:hover{

    transform:translateY(-8px);

    border-color:#d10000;

    box-shadow:0 15px 35px rgba(255,0,0,.15);

}

.collaboration-card i{

    font-size:55px;

    color:#d10000;

    margin-bottom:22px;

}

.collaboration-card h3{

    font-size:28px;

    margin-bottom:18px;

}

.collaboration-card p{

    color:#cfcfcf;

}

/* ===========================================
        QUOTE
=========================================== */

.quote-banner{

    position:relative;

    min-height:520px;

    display:flex;

    justify-content:center;

    align-items:center;

    text-align:center;

    background:url("LandingPageImages/about-hero.png");

    background-size:cover;

    background-position:center;

    overflow:hidden;

}

.quote-overlay{

    position:absolute;

    inset:0;

    background:rgba(0,0,0,.72);

    backdrop-filter:blur(6px);

}

.quote-content{

    position:relative;

    z-index:2;

    max-width:950px;

    padding:30px;

}

.quote-content i{

    font-size:55px;

    color:#ff4040;

    margin-bottom:30px;

}

.quote-content h2{

    font-size:42px;

    font-weight:600;

    line-height:1.5;

    margin-bottom:30px;

}

.quote-content p{

    color:#bbbbbb;

    font-size:20px;

}

/* ===========================================
        RESEARCH CONTRIBUTION
=========================================== */

.contribution-grid{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));

    gap:30px;

}

.contribution-card{

    background:#171717;

    padding:40px;

    border-radius:18px;

    text-align:center;

    transition:.35s;

}

.contribution-card:hover{

    transform:translateY(-10px);

    box-shadow:0 15px 35px rgba(255,0,0,.18);

}

.contribution-card i{

    font-size:46px;

    color:#d10000;

    margin-bottom:22px;

}

.contribution-card h3{

    margin-bottom:15px;

    font-size:24px;

}

.contribution-card p{

    color:#d5d5d5;

}

/* ===========================================
        CONTACT
=========================================== */

.contact-grid{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(350px,1fr));

    gap:40px;

}

.contact-card{

    background:#151515;

    border-radius:22px;

    overflow:hidden;

    text-align:center;

    transition:.35s;

}

.contact-card:hover{

    transform:translateY(-10px);

    box-shadow:0 15px 40px rgba(255,0,0,.18);

}

.contact-card img{

    width:100%;

    height:420px;

    object-fit:cover;

}

.contact-card h3{

    margin-top:30px;

    font-size:30px;

}

.contact-card p{

    color:#cfcfcf;

    padding:10px 30px 20px;

}

.socials{

    display:flex;

    justify-content:center;

    gap:20px;

    padding-bottom:35px;

}

.socials a{

    width:55px;

    height:55px;

    border-radius:50%;

    background:#202020;

    display:flex;

    justify-content:center;

    align-items:center;

    text-decoration:none;

    color:white;

    font-size:22px;

    transition:.35s;

}

.socials a:hover{

    background:#d10000;

    transform:translateY(-5px);

}

/* ===========================================
        DATASET
=========================================== */

.dataset-section{

    background:#101010;

}

.dataset-container{

    max-width:850px;

    margin:auto;

    text-align:center;

}

.dataset-container h2{

    font-size:46px;

    margin-bottom:20px;

}

.dataset-container p{

    color:#cccccc;

    margin-bottom:35px;

    font-size:19px;

}

/* ===========================================
        FOOTER
=========================================== */

footer{

    background:#050505;

    padding:80px 20px;

}

.footer-content{

    max-width:900px;

    margin:auto;

    text-align:center;

}

.footer-content h2{

    font-size:42px;

    margin-bottom:15px;

}

.footer-content h2 span{

    color:#d10000;

}

.footer-content p{

    color:#bbbbbb;

    font-size:18px;

}

.footer-content hr{

    margin:35px auto;

    width:150px;

    border:1px solid rgba(255,255,255,.08);

}


/* ===========================================
        FADE ANIMATION
=========================================== */

@keyframes fadeUp{

    from{

        opacity:0;

        transform:translateY(60px);

    }

    to{

        opacity:1;

        transform:translateY(0);

    }

}

.author-section,
.timeline-item,
.highlight-card,
.publication,
.stat,
.collaboration-card,
.contact-card,
.contribution-card{

    animation:fadeUp .9s ease both;

}

/* ===========================================
        IMAGE EFFECT
=========================================== */

.author-image{

    overflow:hidden;

    border-radius:22px;

}

.author-image::after{

    content:"";

    position:absolute;

    inset:0;

    background:linear-gradient(

        transparent,

        rgba(209,0,0,.15)

    );

    pointer-events:none;

}

.author-image img{

    object-fit:cover;

}

/* ===========================================
        LINKS
=========================================== */

a{

    transition:.35s;

}

a:hover{

    color:#ff3d3d;

}

/* ===========================================
        TABLET
=========================================== */

@media(max-width:1100px){

.navbar{

    padding:20px 35px;

}

.navbar ul{

    gap:22px;

}

.hero-content h1{

    font-size:60px;

}

.author-section{

    grid-template-columns:1fr;

    gap:45px;

}

.author-section.reverse{

    grid-template-columns:1fr;

}

.author-section.reverse .author-image{

    order:-1;

}

.author-image{

    max-width:520px;

    margin:auto;

}

.author-content{

    max-width:100%;

}

.timeline::before{

    left:45px;

}

.year{

    min-width:70px;

    width:70px;

    height:70px;

    font-size:18px;

}

.timeline-content{

    margin-left:25px;

}

.contact-card img{

    height:350px;

}

}

/* ===========================================
        MOBILE
=========================================== */

@media(max-width:768px){

.navbar{

    position:relative;

    flex-direction:column;

    padding:18px;

    gap:18px;

}

.navbar ul{

    flex-wrap:wrap;

    justify-content:center;

    gap:14px;

}

.logo{

    font-size:28px;

}

.hero{

    min-height:90vh;

}

.hero-content{

    padding:30px;

}

.hero-content h1{

    font-size:42px;

}

.hero-content p{

    font-size:17px;

}

.hero-btn{

    padding:15px 28px;

}

section{

    padding:70px 25px;

}

.section-title{

    margin-bottom:45px;

}

.section-title h2{

    font-size:34px;

}

.section-title p{

    font-size:16px;

}

.author-content h2{

    font-size:38px;

}

.author-content h3{

    font-size:18px;

}

.author-content p{

    font-size:16px;

    text-align:left;

}

.author-image{

    max-width:100%;

}

.author-image img{

    width:100%;

}

.timeline{

    padding-left:0;

}

.timeline::before{

    display:none;

}

.timeline-item{

    flex-direction:column;

}

.year{

    margin-bottom:18px;

}

.timeline-content{

    margin-left:0;

}

.highlight-grid{

    grid-template-columns:1fr;

}

.contribution-grid{

    grid-template-columns:1fr;

}

.collaboration-wrapper{

    grid-template-columns:1fr;

}

.stats-grid{

    grid-template-columns:1fr;

}

.contact-grid{

    grid-template-columns:1fr;

}

.publication h3{

    font-size:18px;

}

.quote-content h2{

    font-size:28px;

}

.quote-content p{

    font-size:16px;

}

.dataset-container h2{

    font-size:34px;

}

.dataset-container p{

    font-size:16px;

}

.footer-content h2{

    font-size:30px;

}

.footer-content p{

    font-size:15px;

}

}

/* ===========================================
        SMALL MOBILE
=========================================== */

@media(max-width:480px){

.hero{

    min-height:80vh;

}

.hero-content h1{

    font-size:34px;

}

.hero-content p{

    font-size:15px;

}

.hero-btn{

    width:100%;

    text-align:center;

}

.author-tag{

    font-size:12px;

    padding:6px 14px;

}

.author-content h2{

    font-size:30px;

}

.author-content h3{

    font-size:16px;

}

.author-content p{

    font-size:15px;

}

.highlight-card{

    padding:28px;

}

.highlight-card i{

    font-size:38px;

}

.highlight-card h3{

    font-size:20px;

}

.stat h3{

    font-size:42px;

}

.stat p{

    font-size:15px;

}

.contact-card img{

    height:280px;

}

.socials a{

    width:48px;

    height:48px;

    font-size:18px;

}

.quote-content h2{

    font-size:22px;

}

.dataset-btn{

    display:block;

    width:100%;

}

}

/* ===========================================
        SELECTION
=========================================== */

::selection{

    background:#d10000;

    color:#fff;

}

/* ===========================================
        SMOOTH TRANSITIONS
=========================================== */

img,
button,
a,
.card,
.highlight-card,
.stat,
.contact-card,
.collaboration-card{

    transition:all .35s ease;

}