styles.css

:root {
    --primary-color: #6200ea;
    --secondary-color: #03dac6;
    --background-light: #f4f7f9;
    --text-light: #333;
    --background-dark: #121212;
    --text-dark: #e0e0e0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --font-size: 16px;
    --code-background-light: #f8f8f8;
    --code-text-light: #24292e;
    --code-border-light: #e1e4e8;
    --code-background-dark: #1e1e1e;
    --code-text-dark: #d4d4d4;
    --code-border-dark: #444444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    transition: var(--transition);
    font-size: var(--font-size);
}

.light-mode {
    background-color: var(--background-light);
    color: var(--text-light);
    --code-background: var(--code-background-light);
    --code-text: var(--code-text-light);
    --code-border: var(--code-border-light);
}

.dark-mode {
    background-color: var(--background-dark);
    color: var(--text-dark);
    --code-background: var(--code-background-dark);
    --code-text: var(--code-text-dark);
    --code-border: var(--code-border-dark);
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 2px solid var(--secondary-color);
}

.app-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.icon-button {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--primary-color);
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: 50%;
}

.icon-button:hover {
    background-color: rgba(98, 0, 234, 0.1);
    transform: scale(1.1);
}

.font-size-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(98, 0, 234, 0.1);
    padding: 0.3rem;
    border-radius: 20px;
}

.chat-area {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin: 1rem 0;
}

.chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-right: 1rem;
    margin-left: 1rem;
}

.message {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    max-width: calc(80% - 20px);
    margin-bottom: 1rem;
}

.user-message {
    align-self: flex-end;
    position: relative;
    padding-right: 30px;
    padding-bottom: 20px;
    margin-right: 10px;
}

.message-emoji {
    font-size: 1.5rem;
    min-width: 1.5rem;
}

.user-message .message-emoji {
    position: absolute;
    bottom: 0;
    right: 0;
}

.message-bubble {
    display: flex;
    flex-direction: column;
    padding: 1rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    animation: fadeIn 0.3s ease-out;
}

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

.user-message .message-bubble {
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 5px;
}

.bot-message .message-bubble {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--secondary-color);
    border-bottom-left-radius: 5px;
}

.message-content {
    flex-grow: 1;
    max-width: 100%;
    overflow-wrap: break-word;
    word-wrap: break-word;
    overflow: hidden;
}

.message-content p {
    margin-bottom: 0.5rem;
}

.message-content pre {
    position: relative;
    padding-top: 2.5em; /* Make room for the button */
    background-color: var(--code-background);
    color: var(--code-text);
    border: 1px solid var(--code-border);
    border-radius: 6px;
    padding: 16px;
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.45;
    margin: 0.5rem 0;
}

.message-content code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    font-size: 85%;
    background-color: rgba(27, 31, 35, 0.05);
    border-radius: 3px;
    padding: 0.2em 0.4em;
    margin: 0;
}

.message-content pre code {
    background-color: transparent;
    padding: 0;
    margin: 0;
    font-size: 100%;
    white-space: pre;
    border: 0;
}

.message-content ul, .message-content ol {
    margin-left: 1.5rem;
    margin-bottom: 0.5rem;
}

.message-content a {
    color: var(--secondary-color);
    text-decoration: none;
}

.message-content a:hover {
    text-decoration: underline;
}

.copy-code-button {
    position: absolute;
    top: 5px;
    right: 5px;
    padding: 5px 10px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
}

.copy-code-button:hover {
    background-color: var(--secondary-color);
}

.light-mode .copy-code-button {
    background-color: var(--primary-color);
    color: white;
}

.dark-mode .copy-code-button {
    background-color: var(--secondary-color);
    color: var(--text-dark);
}

.app-footer {
    padding: 1rem 0;
}

.chat-form {
    display: flex;
    gap: 1rem;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.5rem;
    border-radius: 30px;
}

.file-upload-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--secondary-color);
    color: var(--text-dark);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.file-upload-label:hover {
    transform: scale(1.1);
}

#user-input {
    flex-grow: 1;
    padding: 0.8rem 1rem;
    border: none;
    border-radius: 20px;
    background-color: transparent;
    color: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

#user-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.send-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    transition: var(--transition);
}

.send-button:hover {
    background-color: var(--secondary-color);
    transform: scale(1.1);
}

.tts-controls {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.tts-button {
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 15px;
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
    color: inherit;
    cursor: pointer;
    transition: var(--transition);
}

.tts-button:hover:not(:disabled) {
    background-color: var(--secondary-color);
    color: var(--text-dark);
}

.tts-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.bot-message {
    align-items: flex-start;
}

.bot-message-container {
    display: flex;
    flex-direction: row;
    align-items: flex-end;
    gap: 0.5rem;
}

.bot-content-controls {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.chat-messages {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) rgba(0, 0, 0, 0.1);
}

/* LaTeX styles */
.katex-display {
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0.5em 0;
}

.katex {
    font-size: 1.1em;
}

/* Syntax highlighting for light mode */
.light-mode .message-content .token.comment,
.light-mode .message-content .token.prolog,
.light-mode .message-content .token.doctype,
.light-mode .message-content .token.cdata {
    color: #999988;
}

.light-mode .message-content .token.punctuation {
    color: #333333;
}

.light-mode .message-content .token.property,
.light-mode .message-content .token.tag,
.light-mode .message-content .token.boolean,
.light-mode .message-content .token.number,
.light-mode .message-content .token.constant,
.light-mode .message-content .token.symbol {
    color: #0086b3;
}

.light-mode .message-content .token.selector,
.light-mode .message-content .token.attr-name,
.light-mode .message-content .token.string,
.light-mode .message-content .token.char,
.light-mode .message-content .token.builtin {
    color: #183691;
}

/* Syntax highlighting for dark mode */
.dark-mode .message-content .token.comment,
.dark-mode .message-content .token.prolog,
.dark-mode .message-content .token.doctype,
.dark-mode .message-content .token.cdata {
    color: #608b4e;
}

.dark-mode .message-content .token.punctuation {
    color: #d4d4d4;
}

.dark-mode .message-content .token.property,
.dark-mode .message-content .token.tag,
.dark-mode .message-content .token.boolean,
.dark-mode .message-content .token.number,
.dark-mode .message-content .token.constant,
.dark-mode .message-content .token.symbol {
    color: #569cd6;
}

.dark-mode .message-content .token.selector,
.dark-mode .message-content .token.attr-name,
.dark-mode .message-content .token.string,
.dark-mode .message-content .token.char,
.dark-mode .message-content .token.builtin {
    color: #ce9178;
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .header-controls {
        width: 100%;
        justify-content: space-between;
    }

    .message {
        max-width: calc(90% - 20px);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.message-content > *:last-child {
    animation: fadeIn 0.3s ease-out;
}