.header-box {
    position: relative;
    z-index: 1;
    max-width: 960px;
    margin: 90px auto 25px;
    padding: 35px 25px;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.94);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.55);
}

h1.page-title {
    margin-bottom: 10px;
    color: #0d47a1;
    font-family: 'IRANSansBlack', Tahoma, sans-serif !important;
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: 0;
    text-align: center !important;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.45);
}

.header-box .subtitle {
    color: #333;
    font-family: 'IRANSans', Tahoma, sans-serif;
    font-size: 1.4rem;
    font-weight: 500;
    letter-spacing: 0;
    text-align: center;
}

body.dark-mode .header-box {
    background-color: #1e1e1ef5 !important;
    color: #e0e0e0 !important;
    box-shadow: 0 0 50px rgba(13, 110, 253, 0.3) !important;
    transition: all 0.5s ease;
}

body.dark-mode h1.page-title {
    color: #4da3ff;
}

body.dark-mode .header-box .subtitle {
    color: #bbb;
}

@media (max-width: 576px) {
    .header-box {
        margin-right: 15px;
        margin-left: 15px;
    }

    h1.page-title {
        font-size: 2.1rem;
    }
}