body {
    font-family: 'Iransans', sans-serif;
    color: #333;
    margin: 0;
    padding: 0;
    height: 100vh;
    background: radial-gradient(circle at top, #1e3c72, #2a5298, #000c40); 
    background-attachment: fixed;
    background-size: cover;
    background-position: center center;
}

.container {
    width: 80%;
    margin: 0 auto;
    padding: 50px 0;
    background-color: rgba(255, 255, 255, 0.85); /* پس‌زمینه نیمه شفاف */
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5); 
}


.section-title {
    text-align: center;
    font-size: 32px;
    color: #fff; 
    margin-bottom: 40px;
    font-weight: 600;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5); 
}


.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}


.contact-item {
    display: flex;
    align-items: center;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease-in-out;
    border-left: 5px solid #4a90e2;
    transform: perspective(1000px) rotateX(5deg); 
}

.contact-item:hover {
    transform: perspective(1000px) rotateX(0deg) translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
}


.contact-item i {
    font-size: 35px;
    color: #4a90e2;
    margin-left: 10px;
    margin-right: 20px;
}

.contact-text h5 {
    font-size: 18px;
    color: #4a90e2;
    margin: 0;
    font-weight: 600;
}

.contact-text p {
    font-size: 16px;
    color: #777;
    margin-top: 5px;
}

@media (max-width: 768px) {
    .contact-info {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 28px;
    }

    .contact-item {
        padding: 25px;
    }

    .contact-item i {
        font-size: 30px;
    }
}


.back-button {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #4a90e2, #1e3c72); /* گرادینت سه‌بعدی روی دکمه */
    color: white;
    font-size: 18px;
    padding: 12px 25px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    border: none;
    font-weight: bold;
}

.back-button:hover {
    background: linear-gradient(135deg, #1e3c72, #4a90e2);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transform: translateY(-3px) translateX(-50%);
}

.back-button i {
    margin-left: 5px;
}