body,
h1,
textarea,
button {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.container {
    max-width: 500px;
    margin: 50px auto;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.title {
    text-align: center;
    font-size: 24px;
    color: #333;
}

textarea {
    width: 100%;
    padding: 10px;
    margin: 15px 0;
    border-radius: 5px;
    border: 1px solid #ccc;
    resize: none;
    font-size: 16px;
    min-height: 300px;
    outline: none;
}

textarea#title {
    min-height: 100px;
}

.send-btn {
    display: block;
    width: 100%;
    padding: 10px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.send-btn:hover {
    background-color: #0056b3;
}

.send-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.show-error {
    display: flex;
    justify-content: center;
    align-items: center;
    color: #1fbf1f;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    padding: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    min-height: 40px;
    opacity: 0;
}

.show-error.show {
    opacity: 1;
}

.show-error.error {
    color: red;
}