/* General Styles */
body {
    background-color: hsl(234, 29%, 20%);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
}

.container {
    display: flex;
    background-color: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0px 8px 24px rgba(0, 0, 0, 0.2);
    max-width: 900px;
    width: 90%;
}

.card {
    display: flex;
    flex-direction: row;
    width: 100%;
}

.card-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.card-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 50%;
}

.heading1 {
    color: hsl(234, 29%, 20%);
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

p {
    color: hsl(234, 29%, 20%);
    font-size: 1rem;
    line-height: 1.5;
}

.list {
    list-style: none;
    padding: 0;
    margin-bottom: 1.5rem;
}

.list li {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}

.list li img {
    margin-right: 1rem;
}

form {
    display: flex;
    flex-direction: column;
}

label {
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: hsl(234, 29%, 20%);
}

.input1 {
    padding: 0.8rem;
    border: 1px solid hsl(234, 29%, 20%);
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.subscribe {
    background-color: hsl(234, 29%, 20%);
    color: white;
    padding: 0.8rem;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
}

.subscribe:hover {
    background-color: hsl(234, 29%, 30%);
}

/* Responsive Design */
@media (max-width: 768px) {
    .card {
        flex-direction: column;
    }

    .card-image img {
        width: 100%;
        height: auto;
    }

    .card-content {
        width: 100%;
        padding: 1.5rem;
    }
}
.input1.error {
    border: 1px solid hsl(0, 100%, 66%);
    background-color: hsl(0, 100%, 96%);
}

.error-message {
    color: hsl(0, 100%, 66%);
    font-size: 0.8rem;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    display: none; /* به طور پیش‌فرض مخفی است */
}

.error-message.active {
    display: block;
}

@media (max-width: 375px) {
    .container {
        border-radius: 1rem;
    }

    .heading1 {
        font-size: 1.5rem;
    }

    p {
        font-size: 0.9rem;
    }

    .input1 {
        font-size: 0.9rem;
        padding: 0.6rem;
    }

    .subscribe {
        font-size: 0.9rem;
        padding: 0.6rem;
    }
}