main {
    font-family: Arial, sans-serif;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center; 
    align-items: center; 
    text-align: left;
}

aside {
    margin: auto;
    max-width: 1000px;
    width: 90%;
    display: flex;
    flex-direction: column;
    height: 90%;
    background-color: rgba(240, 240, 240, 0.75);
    border-radius: 20px;    
    position: relative;
}

form, #chat-box {
    margin: 1em;    
}

form {
    display: grid;
    grid-template-columns: auto 120px;
    align-items: center;
}

form textarea, form button, select {
    padding: 1em;
    border: none;
    margin: 1em;
    border-radius: 20px;
    height: 56px;
}

form button, select {
    background: rgba(68, 68, 68, 0.75);
    cursor: pointer;
    color: white;
}

form textarea {
    resize: none;    
    max-height: 200px;
    font-family: inherit;
    font-size: 1em; 
    overflow-y: auto;
}

select {
    max-width: 60%;
    width: 230px;
    font-size: 1em;
    font-weight: bold;
    margin: 2em;
}

#chat-box {
    flex: 1;
    overflow: auto;
}

#chat-box div {
    display: block;              
    width: fit-content;          
    max-width: 80%;              
    border-radius: 20px;
    padding: 1em;
    word-wrap: break-word;      
    opacity: 0;                  /* start invisible */
    transform: translateY(10px); /* start slightly lower */
    animation: fadeInUp 0.7s ease-out forwards;
    white-space: pre-wrap;  
}


.user {
    margin: 1em;
    margin-left: auto;
    background-color: white;
}

.ai {
    margin-right: auto;
    background-color: #caddef;
    padding: 1em;
    border-radius: 20px;
    margin: 1em;
    word-wrap: break-word;
}

.ai h3, .ai h2 {
    margin: 0.5em 0;
}

.ai pre {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 0.8em;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9em;
}

.error {
    margin-right: auto;
    background-color: #fc8e78;
    margin: 1em;
}

#chat-box div.thinking {
    font-style: italic;
    opacity: 0.6;
    animation: blink 1.5s infinite ease-in-out;
}

ol, ul {
    margin-left: 2em;
}

/** Animation **/

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes blink {
    0%   { opacity: 0.3; }
    50%  { opacity: 1; }
    100% { opacity: 0.3; }
}