body {
    direction: rtl;
    font-family: "IRANSans", "Tahoma", sans-serif;
    background-color: #f9f9fb;
}

.letter-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 25px 35px;
    margin: 35px auto;
    max-width: 650px;
    color: #333;
    text-align: right;
}

    .letter-card h2 {
        text-align: center;
        padding-bottom: 10px;
        margin-bottom: 25px;
        color: mediumblue;
        font-weight: 600;
    }

.letter-item {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    transition: background-color 0.3s, transform 0.3s;
}

    .letter-item:hover {
        background-color: #e5f2f5;
        border-radius: 8px;
        transform: translateY(-2px);
        padding: 8px 10px;
    }

.letter-label {
    font-weight: 600;
    color: darkblue;
    margin-bottom: 4px;
    font-size: 0.95rem;
}

.letter-value {
    font-size: 1.2rem;
    color: #212121;
    padding-right: 5px;
    word-break: break-word;
}

.btn-download {
    display: block;
    width: 100%;
    margin-top: 25px;
    background: linear-gradient(90deg, #6a1b9a, #8e24aa);
    color: #fff;
    border: none;
    padding: 12px 0;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease-in-out;
}

    .btn-download:hover {
        background-color: #7b1fa2;
        transform: translateY(-2px);
        box-shadow: 0 6px 8px rgba(106,27,154,0.3);
    }