/* Background */
main.container{
    padding:50px 20px;
    background:linear-gradient(135deg,#d9e4f2,#c5d9f0); /* light bluish gradient */
}

/* Title */
main h4{
    text-align:center;
    font-size:32px;
    font-weight:700;
    margin-bottom:30px;
    color:#0b2f5a; /* dark blue */
}

/* Filter Buttons */
.gallery-filters{
    text-align:center;
    margin-bottom:35px;
}

.filter-btn{
    padding:10px 22px;
    margin:5px;
    border:none;
    border-radius:30px;
    background:white;
    box-shadow:0 5px 15px rgba(0,0,0,0.1);
    cursor:pointer;
    font-weight:600;
    transition:0.3s;
}

.filter-btn:hover{
    background:#1e4d8a; /* dark blue hover */
    color:white;
    transform:translateY(-3px);
}

.filter-btn.active{
    background:#0b2f5a; /* darker blue */
    color:white;
}

/* Gallery Grid */
.gallery-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
    gap:25px;
    padding:10px;
    border:2px solid rgba(0,0,0,0.1);
    border-radius:12px;
}

/* Media Card */
.media-card{
    position:relative;
    overflow:hidden;
    border-radius:16px;
    background:#fff;
    border:2px solid #0b2f5a; /* dark blue border */
    box-shadow:0 15px 35px rgba(0,0,0,0.15);
    transition:all 0.4s ease;
    animation:cardFloat 6s ease-in-out infinite;
}

@keyframes cardFloat{
    0% { transform:translateY(0px); }
    50% { transform:translateY(-8px); }
    100% { transform:translateY(0px); }
}

/* Image */
.media-card img{
    width:100%;
    height:220px;
    object-fit:cover;
    transition:transform 0.6s ease;
}

.media-card:hover img{
    transform:scale(1.15) rotate(1deg);
}

/* Hover Card Lift */
.media-card:hover{
    transform:translateY(-12px) scale(1.03);
    box-shadow:0 25px 45px rgba(0,0,0,0.25);
}

/* Glow Border Effect */
.media-card::before{
    content:"";
    position:absolute;
    top:-2px; left:-2px; right:-2px; bottom:-2px;
    border-radius:20px;
    background:linear-gradient(45deg,#0b2f5a,#4a6fa3,#1e4d8a);
    z-index:-1;
    filter:blur(8px);
    opacity:0;
    transition:0.4s;
}

.media-card:hover::before{
    opacity:1;
}

/* Overlay */
.overlay{
    position:absolute;
    top:0; left:0;
    width:100%; height:100%;
    background:rgba(0,0,0,0.4);
    display:flex;
    align-items:center;
    justify-content:center;
    opacity:0;
    transition:0.4s;
}

.overlay i{
    color:white;
    font-size:32px;
    transform:scale(0);
    transition:0.3s;
}

.media-card:hover .overlay{
    opacity:1;
}

.media-card:hover .overlay i{
    transform:scale(1.1);
}

/* Caption */
.media-card p{
    margin:0;
    padding:14px;
    text-align:center;
    font-weight:600;
    font-size:16px;
    background: rgba(30,64,122,0.08);
    border-top:1px solid #1e4d8a;
    transition: background 0.4s ease;
}

.media-card:hover p{
    background: rgba(30,64,122,0.15);
}

/* Video Links */
.video-links li a{
    display:flex;
    align-items:center;
    padding:12px 18px;
    border-radius:30px;
    background:#789ecf; /* bluish */
    color:#0d1b2e;
    text-decoration:none;
    font-weight:600;
    position:relative;
    overflow:hidden;
    box-shadow:0 6px 15px rgba(30,64,122,0.25);
    transition:all 0.4s ease;
    animation: videoGlow 3s ease-in-out infinite;
}

.video-links li a:hover{
    transform: translateY(-6px) scale(1.05);
    box-shadow:0 15px 30px rgba(30,64,122,0.45);
}

.video-links li a::after{
    content:"▶";
    font-size:22px;
    color:#fff;
    position:absolute;
    right:15px;
    top:50%;
    transform:translateY(-50%) scale(1);
    transition: transform 0.3s ease;
}

.video-links li a:hover::after{
    transform:translateY(-50%) scale(1.4);
}

@keyframes videoGlow{
    0% { box-shadow:0 6px 15px rgba(30,64,122,0.2); }
    50% { box-shadow:0 6px 25px rgba(30,64,122,0.5); }
    100% { box-shadow:0 6px 15px rgba(30,64,122,0.2); }
}

/* Lightbox */
.lightbox{
    position:fixed;
    top:0; left:0;
    width:100%; height:100%;
    background:rgba(0,0,0,0.85);
    display:flex;
    justify-content:center;
    align-items:center;
    opacity:0;
    pointer-events:none;
    transition:opacity 0.5s ease;
    z-index:9999;
}

.lightbox.active{
    opacity:1;
    pointer-events:all;
}

.lightbox-content{
    max-width:90%;
    max-height:80%;
    border-radius:12px;
    background-color:#1b2f50;
    box-shadow:0 20px 50px rgba(11,47,90,0.7); /* dark blue shadow */
    transform:scale(0.8);
    transition:transform 0.4s ease;
}

.lightbox.active .lightbox-content{
    transform:scale(1);
    animation: floatImage 6s ease-in-out infinite;
}

@keyframes floatImage{
    0% { transform: scale(1) translateY(0px); }
    50% { transform: scale(1.02) translateY(-8px); }
    100% { transform: scale(1) translateY(0px); }
}

/* Lightbox Close */
.lightbox-close{
    position:absolute;
    top:25px; right:25px;
    font-size:32px;
    color:#1e4d8a;
    background-color: rgba(30,64,122,0.3);
    cursor:pointer;
    padding:8px;
    border-radius:50%;
    transition:all 0.3s ease;
}

.lightbox-close:hover{
    transform: scale(1.2);
    color: #ffffff;
    text-shadow:0 0 12px #1e4d8a,0 0 20px rgba(30,64,122,0.6);
}

/* Lightbox Navigation Buttons */
.lightbox-nav button{
    position:absolute;
    top:50%;
    transform:translateY(-50%);
    background: rgba(30,64,122,0.3);
    border:none;
    color:#fff;
    font-size:28px;
    padding:12px 18px;
    border-radius:50%;
    cursor:pointer;
    transition:all 0.3s ease;
}

.lightbox-nav .lightbox-prev{ left:30px; }
.lightbox-nav .lightbox-next{ right:30px; }

.lightbox-nav button:hover{
    background: #0b2f5a;
    box-shadow:0 0 15px #1e4d8a,0 0 30px rgba(30,64,122,0.6);
}

/* Marquee H4 */
.h4-marquee h4{
    display:inline-block;
    white-space:nowrap;
    font-family:'Poppins','Arial',sans-serif;
    font-weight:600;
    font-size:1.8rem;
    color:#0b2f5a; /* dark blue */
    letter-spacing:1px;
    padding:12px 20px;
    border:2px solid #1e4d8a;
    border-radius:12px;
    animation:marquee 10s linear infinite;
}

@keyframes marquee{
    0% { transform: translateX(100%); }
    100% { transform: translateX(-100%); }
}