:root {
    --black: #0B0F17;
    --white: #FFFFFF;
    --alabaster: #F8FAFC;
    --border: #E2E8F0;
    --dark-text: #0F172A;
    --gold-gradient: linear-gradient(135deg, #BF953F 0%, #FCF6BA 25%, #B38728 50%, #FBF5B7 75%, #AA771C 100%);
    --gold-solid: #D4AF37;
    }

    /* PENTING: Reset asas untuk kawalan saiz yang tepat */
    * { 
        box-sizing: border-box; 
        margin: 0; 
        padding: 0; 
    }

    body {
        font-family: 'Poppins', sans-serif;
        background: linear-gradient(135deg, var(--black) 0%, #1E293B 100%);
        margin: 0;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        color: var(--dark-text);
        padding: 20px; /* Jarak keselamatan di sekeliling skrin mobile */
    }

    /* --- BUTANG KEMBALI --- */
    .back-btn {
        position: absolute;
        top: 30px;
        left: 30px;
        color: var(--white);
        text-decoration: none;
        font-size: 0.9em;
        display: flex;
        align-items: center;
        gap: 8px;
        opacity: 0.7;
        transition: opacity 0.3s;
    }
    .back-btn:hover { opacity: 1; color: var(--gold-solid); }

    /* --- KOTAK LOG MASUK --- */
    .login-box {
        background: var(--white);
        width: 100%;
        max-width: 420px;
        padding: 50px 40px; /* Padding asal desktop */
        border-radius: 20px;
        box-shadow: 0 25px 50px rgba(0,0,0,0.5);
        text-align: center;
        border-top: 5px solid var(--gold-solid);
        animation: fadeIn 0.6s ease-out;
    }

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

    .login-box img { height: 120px; margin-bottom: -10px; }
    .login-box h1 { font-size: 1.6em; font-weight: 700; color: var(--black); margin-bottom: 5px; }
    .login-box p.subtitle { color: #64748B; font-size: 0.9em; margin-bottom: 30px; }

    .input-group { text-align: left; margin-bottom: 20px; }
    .input-group label { display: block; font-size: 0.85em; font-weight: 600; color: var(--black); margin-bottom: 8px; }
    .input-group input {
        width: 100%;
        padding: 14px;
        border: 1px solid var(--border);
        border-radius: 8px;
        font-family: 'Poppins', sans-serif;
        background: var(--alabaster);
        transition: all 0.3s;
    }
    .input-group input:focus { outline: none; border-color: var(--gold-solid); background: var(--white); box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15); }

    .submit-btn {
        background: var(--black);
        color: var(--gold-solid);
        width: 100%;
        padding: 14px;
        border: none;
        border-radius: 50px;
        font-size: 1em;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s;
        margin-top: 10px;
    }
    .submit-btn:hover { background: var(--gold-gradient); color: var(--black); }
    .submit-btn:disabled { background: #E2E8F0; color: #94A3B8; cursor: not-allowed; }

    .links-area { margin-top: 25px; font-size: 0.85em; }
    .links-area a { color: var(--black); text-decoration: none; font-weight: 600; transition: color 0.3s; }
    .links-area a:hover { color: var(--gold-solid); }

    #errorMessage { color: #EF4444; font-size: 0.85em; margin-top: 15px; display: none; font-weight: 500; }
    .footer-text { margin-top: 40px; color: rgba(255,255,255,0.4); font-size: 0.75em; }

    /* ===================================================
    MEDIA QUERY: AUTOMATIK KECILKAN ELEMEN DI MOBILE
    =================================================== */
    @media (max-width: 480px) {
        .back-btn {
            position: static; /* Tukar jadi static supaya tak bertindih dengan kotak di skrin kecil */
            margin-bottom: 20px;
            align-self: flex-start;
        }
        .login-box {
            padding: 35px 25px; /* Kurangkan padding supaya ruangan menaip lebih luas */
            width: 100%;
        }
        .login-box h1 { font-size: 1.4em; } /* Kecilkan teks tajuk */
        .login-box p.subtitle { font-size: 0.85em; margin-bottom: 20px; }
        .input-group input { padding: 12px; font-size: 0.9em; } /* Input lebih kompak */
        .submit-btn { padding: 12px; font-size: 0.95em; }
    }