body {
        background: linear-gradient(135deg, rgba(10,42,67,0.80), rgba(22,194,183,0.80)),
                    url('https://images.unsplash.com/photo-1522071820081-009f0129c71c?auto=format&fit=crop&w=1200&q=60');
        background-size: cover;
        background-position: center;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 20px;
    }

    .login-card {
        background: rgba(255,255,255,0.92);
        border-radius: 14px;
        padding: 25px 28px;
        box-shadow: 0 8px 25px rgba(0,0,0,0.18);
        max-width: 310px;
        width: 100%;
        animation: fadeIn 0.8s ease;
    }

    .login-card h4 {
        color: #0a2a43;
        font-weight: 700;
        font-size: 20px;
    }

    .btn-theme {
        background: linear-gradient(135deg, #0a2a43, #16c2b7);
        border: none;
        color: white;
        font-weight: 600;
        padding: 9px;
        border-radius: 10px;
        font-size: 14px;
    }

    .btn-theme:hover {
        opacity: 0.9;
    }

    .input-focus:focus {
        border-color: #16c2b7 !important;
        box-shadow: 0 0 0 0.15rem rgba(22,194,183,0.4) !important;
    }

    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(20px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .logo-box {
        width: 65px;
        height: 65px;
        background: linear-gradient(135deg, #0a2a43, #16c2b7);
        border-radius: 50%;
        margin: 0 auto 15px;
        display:flex;
        align-items:center;
        justify-content:center;
        box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    }

    .logo-box i {
        font-size: 28px;
        color: white;
    }

    .form-label {
        font-size: 13px;
    }

    .form-control {
        padding: 6px 10px;
        font-size: 13px;
    }

    small {
        font-size: 11px;
    }

        /* --- Perapian Input Password --- */
    .input-group>.form-control {
        border-right: none;
    }
    #togglePassword {
        background: #fff;
        border-left: none;
        border-color: #ced4da;
    }
    #togglePassword i {
        font-size: 14px;
        color: #666;
    }
    #togglePassword:hover {
        background: #f8f9fa;
    }

    /* Login card spacing */
    .login-card {
        max-width: 330px;
        margin: 50px auto;
        padding: 25px 22px;
        background: #ffffffee;
        border-radius: 14px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    }

    .login-card h4 {
        font-weight: 700;
    }

    .form-label {
        font-size: 13px;
        font-weight: 600;
    }

    .form-control {
        font-size: 13px;
        padding: 8px 10px;
    }

    .btn-theme i {
        font-size: 13px;
    }

    /* POSISI ALERT */
    .alert-position {
        position: fixed;
        top: 25px;                        /* posisi default */
        left: 50%;
        transform: translateX(-50%);
        width: 90%;
        max-width: 380px;                 /* lebih kecil agar rapi */
        z-index: 9999;
    }

    /* STYLE ALERT */
    .alert-position .alert {
        font-size: 12px;                  /* PERKECIL HURUF */
        padding: 8px 12px;                /* PERKECIL PADDING */
        border-radius: 6px;
    }

    /* KHUSUS VERSI MOBILE */
    @media (max-width: 480px) {
        .alert-position {
            top: 15px;                    /* lebih dekat ke atas */
            width: 92%;
            max-width: 330px;
        }

        .alert-position .alert {
            font-size: 11px;              /* lebih kecil di mobile */
            padding: 6px 10px;
        }
    }