*{
            margin:0;
            padding:0;
            box-sizing:border-box;
            font-family:Arial,sans-serif;
        }

        body{
            background:#f1f5f9;
            color:#111827;
        }

        /* HERO */

        .hero{
            width:100%;
            min-height:55vh;
            background:
            linear-gradient(rgba(15,23,42,0.82),rgba(15,23,42,0.82)),
            url('https://images.unsplash.com/photo-1522202176988-66273c2fd55f');
            background-size:cover;
            background-position:center;
            display:flex;
            justify-content:center;
            align-items:center;
            text-align:center;
            padding:20px;
        }

        .hero-content{
            max-width:850px;
            color:white;
        }

        .hero-content span{
            display:inline-block;
            background:#2563eb;
            padding:10px 24px;
            border-radius:40px;
            margin-bottom:25px;
            font-size:14px;
            font-weight:600;
        }

        .hero-content h1{
            font-size:58px;
            margin-bottom:20px;
        }

        .hero-content p{
            font-size:18px;
            line-height:1.8;
            color:#e5e7eb;
        }

        /* SECTION */

        .alumni-section{
            width:100%;
            padding:90px 20px;
        }

        .container{
            max-width:1350px;
            margin:auto;
        }

        /* TITLE */

        .section-title{
            text-align:center;
            margin-bottom:50px;
        }

        .section-title h2{
            font-size:46px;
            margin-bottom:15px;
        }

        .section-title p{
            color:#555;
            max-width:750px;
            margin:auto;
            line-height:1.8;
        }

        /* BUTTON */

        .top-action{
            text-align:center;
            margin-bottom:50px;
        }

        .add-btn{
            padding:15px 32px;
            border:none;
            border-radius:50px;
            background:#2563eb;
            color:white;
            font-size:16px;
            font-weight:600;
            cursor:pointer;
            transition:0.3s;
        }

        .add-btn:hover{
            background:#1d4ed8;
            transform:translateY(-3px);
        }

        /* FILTER */

        .filter-buttons{
            display:flex;
            justify-content:center;
            flex-wrap:wrap;
            gap:15px;
            margin-bottom:60px;
        }

        .filter-btn{
            padding:12px 24px;
            border:none;
            border-radius:40px;
            background:white;
            color:#2563eb;
            cursor:pointer;
            font-size:15px;
            font-weight:600;
            box-shadow:0 8px 20px rgba(0,0,0,0.08);
            transition:0.3s;
        }

        .filter-btn.active,
        .filter-btn:hover{
            background:#2563eb;
            color:white;
        }

        /* GRID */

        .alumni-grid{
            display:grid;
            grid-template-columns:repeat(4,1fr);
            gap:30px;
        }

        /* CARD */

        .alumni-card{
            background:white;
            border-radius:25px;
            overflow:hidden;
            box-shadow:0 10px 30px rgba(0,0,0,0.08);
            transition:0.4s;
        }

        .alumni-card:hover{
            transform:translateY(-10px);
        }

        .alumni-image{
            position:relative;
        }

        .alumni-image img{
            width:100%;
            height:260px;
            object-fit:cover;
        }

        .session{
            position:absolute;
            top:15px;
            right:15px;
            background:#2563eb;
            color:white;
            padding:7px 14px;
            border-radius:30px;
            font-size:13px;
        }

        .alumni-content{
            padding:25px;
            text-align:center;
        }

        .alumni-content h3{
            font-size:24px;
            margin-bottom:10px;
        }

        .branch{
            color:#2563eb;
            font-weight:600;
            margin-bottom:12px;
            display:block;
        }

        .alumni-content p{
            color:#555;
            line-height:1.7;
            font-size:14px;
        }

        /* HIDE */

        .hide{
            display:none;
        }

        /* POPUP */

        .popup{
            position:fixed;
            top:0;
            left:0;
            width:100%;
            height:100%;
            background:rgba(0,0,0,0.7);
            display:none;
            justify-content:center;
            align-items:center;
            padding:20px;
            z-index:999;
        }

        .popup.active{
            display:flex;
        }

        .popup-box{
            width:100%;
            max-width:650px;
            background:white;
            border-radius:30px;
            padding:40px;
            position:relative;
            max-height:90vh;
            overflow-y:auto;
        }

        .close-popup{
            position:absolute;
            top:15px;
            right:22px;
            font-size:34px;
            cursor:pointer;
            color:#555;
        }

        .popup-box h2{
            font-size:34px;
            margin-bottom:10px;
        }

        .popup-box p{
            color:#555;
            margin-bottom:25px;
            line-height:1.7;
        }

        /* FORM */

        .input-box{
            margin-bottom:20px;
        }

        .input-box label{
            display:block;
            margin-bottom:8px;
            font-weight:600;
        }

        .input-box input,
        .input-box select,
        .input-box textarea{
            width:100%;
            padding:15px;
            border:1px solid #d1d5db;
            border-radius:12px;
            outline:none;
            background:#f8fafc;
        }

        .input-box textarea{
            height:120px;
            resize:none;
        }

        .submit-btn{
            width:100%;
            padding:15px;
            border:none;
            border-radius:12px;
            background:#2563eb;
            color:white;
            font-size:16px;
            font-weight:600;
            cursor:pointer;
        }

        .submit-btn:hover{
            background:#1d4ed8;
        }

        /* RESPONSIVE */

        @media(max-width:1100px){

            .alumni-grid{
                grid-template-columns:repeat(2,1fr);
            }

        }

        @media(max-width:768px){

            .hero-content h1{
                font-size:36px;
            }

            .section-title h2{
                font-size:30px;
            }

            .alumni-grid{
                grid-template-columns:1fr;
            }

            .popup-box{
                padding:30px 20px;
            }

        }