.message {
    margin-bottom: 15px;
    padding: 10px 15px;
    border-radius: 10px;
    max-width: 80%;
    word-wrap: break-word;
    line-height: 1.5;
}

.user-message {
    background-color: #d1e7dd;
    margin-left: auto;
    border-bottom-right-radius: 0;
}

.ai-message, .assistant-message {
    background-color: #f1f1f1;
    border:solid 1px #ccc;
    margin-right: auto;
    border-bottom-left-radius: 0;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: #0d6efd;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.input-area {
    border: solid 1px royalblue;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    flex-shrink: 0; /* جلوگیری از فشرده شدن */
}

textarea {
    width: 100%;
    border-radius: 5px;
    padding: 5px;
    resize: none;
    /*font-size: 16px;*/
    min-height: 50px;
    border: 0;
    overflow-y: clip;
    font-family: inherit;
    background: transparent;
}

textarea:focus-visible {
    outline: 0;
}

.form-check{
    padding-left:0;
    padding-right: 1.25rem;
}

.form-check-input {
    margin-top: 0.5rem;
    margin-right: -1.25rem;
}