body {
            background-color: #f8f9fa;
            height: 100vh;
            display: flex;
            align-items: center;
        }
        .login-container {
            max-width: 420px;
            width: 100%;
            margin: auto;
        }
        .card {
            border: none;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        .school-logo {
            width: 100px;
            height: auto;
            margin-bottom: 15px;
        }
        .btn-primary {
            background-color: #0d6efd;
            border: none;
            padding: 10px;
            font-weight: 600;
        }
        .btn-primary:hover {
            background-color: #0b5ed7;
        }
        .input-group-text {
            background-color: transparent;
            border-right: none;
        }
        .form-control {
            border-left: none;
        }
        .form-control:focus {
            box-shadow: none;
            border-color: #dee2e6;
        }