*{
    box-sizing:border-box;
}

html{
    scroll-behavior:smooth;
}

body{
    margin:0;
    font-family:'Cairo',sans-serif;
    background:#F8FBFD;
    color:#1F2937;
}
.visitor-counter { margin-top: 30px; padding-top: 15px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 10px; }

.hero{
    position:relative;
    overflow:hidden;
    background:
        linear-gradient(
            135deg,
            #fbfdff 0%,
            #f3fbff 45%,
            #f8fcff 100%
        );
    text-align:center;
    padding:20px 20px 25px;
}


.hero::before{
    width:280px;
    height:280px;
    top:-100px;
    right:-80px;
    background:rgba(105,208,255,.08);
    filter:blur(100px);
}

.hero::after{
    width:220px;
    height:220px;
    bottom:-80px;
    left:-60px;
    background:rgba(140,230,255,.06);
    filter:blur(80px);
}

.hero h1{
    position:relative;
    z-index:1;
    font-size:32px;
    font-weight:800;
    color:#1E293B;
    margin:0 0 10px;
}

.hero p{
    position:relative;
    z-index:1;

    color:#6B7280;
    font-size:15px;
    margin:8px 0 18px;
}

#searchInput{
    position:relative;
    z-index:1;
    width:100%;
    max-width:650px;
    margin-top:12px;
    padding:16px 24px;
    border:1px solid #E5EEF5;
    outline:none;
    background:white;
    border-radius:99px;
    box-shadow:
    0 10px 30px rgba(0,0,0,.06);
    font-size:15px;
    transition:.25s;
}

#searchInput:focus{
    box-shadow:
        0 0 0 4px rgba(105,208,255,.15),
        0 10px 30px rgba(0,0,0,.06);
}

#categoryButtons{
    position:sticky;
    top:0;
    z-index:100;
    display:flex;
    justify-content:center;
    flex-wrap:wrap;
    gap:8px;
    padding:10px 16px;
    background:rgba(248,251,253,.88);
    backdrop-filter:blur(14px);
    transition:transform .3s ease;
    border-bottom:1px solid #EDF2F7;
    box-shadow:0 6px 18px rgba(15,23,42,.04);
}

#categoryButtons::-webkit-scrollbar{
    display:none;
}


.category-btn{
    flex-shrink:0;
    white-space:nowrap;
    background:white;
    color:#3A7CA5;
    border:1px solid #E3EEF5;
    border-radius:30px;
     padding:8px 14px;
    font-size:14px;
    margin:5px;
    cursor:pointer;
    transition:.25s;
}

.category-btn:hover{
    background:#3A7CA5;
    color:white;
}

main{
    max-width:1500px;
    margin:auto;
    padding:30px;
}

#videos{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(340px,1fr));
    gap:25px;
}

.card{
    background:white;
    border-radius:22px;
    overflow:hidden;
    cursor:pointer;
    box-shadow:
    0 8px 30px rgba(15,23,42,.06);
    display:flex;
    flex-direction:column;
    transition:.25s;
}

.card:hover{
    transform:translateY(-6px);

    box-shadow:
    0 20px 40px rgba(15,23,42,.10);
}

.card:hover img{
    transform:scale(1.03);
}

.card img{
    width:100%;
    display:block;
    transition:.4s;
    aspect-ratio:16/9;
    object-fit:cover;
}

.card-content{
    padding:18px;
}

.card h3{
    font-size:17px;
    line-height:1.8;
    margin-top:0;
    margin-bottom:12px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}

.category{
    color:#777;
}

.category-btn.active{

    background:linear-gradient(
        135deg,
        #7EB7D8,
        #5B8DB8
    );
    color:white;
    transform:translateY(-2px);
    box-shadow:
        0 12px 25px rgba(91,141,184,.25);
}

.notice{
    position:relative;
    z-index:1;
    max-width:750px;
    margin:25px auto 0;
    padding:14px 18px;
    background:rgba(255,255,255,.65);
    backdrop-filter:blur(12px);
    border:1px solid rgba(255,255,255,.8);
    border-radius:16px;
    color:#4B5563;
    line-height:1.8;
}

@media (max-width: 768px){

    #categoryButtons{
        flex-wrap:wrap;
        gap:8px;
    }
    .category-btn{
        font-size:14px;
        padding:10px 14px;
    }
    #categoryButtons.hide{
        transform:translateY(-100%);
    }
}