body {
            background: url('https://images.unsplash.com/photo-1549298916-b41d501d3772') center/cover no-repeat;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            backdrop-filter: blur(4px);
        }

        .overlay {
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background: rgba(0,0,0,0.55);
        }

        .login-card {
            width: 92%;
            max-width: 380px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 15px;
            padding: 35px 25px;
            backdrop-filter: blur(12px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.45);
            color: #fff;
            position: relative;
            animation: fadeIn 0.7s ease-in-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-12px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .login-card input {
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.25);
            color: #fff;
            font-size: 16px;
            height: 48px;
        }

        .login-card input::placeholder {
            color: #ddd;
        }

        .input-group-text {
            background: rgba(255,255,255,0.1);
            border: none;
            color: #fff;
        }

        .btn-login {
            background: #0d6efd;
            border: none;
            font-weight: bold;
            height: 48px;
            transition: 0.3s;
        }

        .btn-login:hover {
            background: #084298;
        }

        .logo {
            width: 85px;
            margin: 0 auto 15px;
            display: block;
        }

        a {
            color: #cfe2ff;
            text-decoration: none;
        }

        a:hover {
            color: #fff;
            text-decoration: underline;
        }