/* ChatGPT-like UI Styles */
:root {
    /* ChatGPT Dark Theme Colors */
    --bg-primary: #212121;
    --bg-secondary: #2f2f2f;
    --bg-tertiary: #3f3f3f;
    --bg-hover: #3e3e3e;
    --text-primary: #ececec;
    --text-secondary: #c5c5c5;
    --text-tertiary: #8e8e8e;
    --border-color: #4e4e4e;
    --accent-color: #10a37f;
    --accent-hover: #0d8c6d;
    --user-message-bg: #2f2f2f;
    --assistant-message-bg: #212121;
    --input-bg: #40414f;
    --input-border: #565869;
    --button-primary: #10a37f;
    --button-secondary: #40414f;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Portuguese Colors (for branding) */
    --portuguese-green: #006D00;
    --portuguese-red: #CE1021;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

/* Header */
header {
    display: none; /* Hide header for ChatGPT-like experience */
}

/* Main Layout */
.main-layout {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    overflow: hidden; /* Prevent content overflow */
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar-header {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

/* User Info Section */
.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 12px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-color), var(--portuguese-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.user-email {
    flex: 1;
    font-size: 13px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.new-chat-button {
    width: 100%;
    padding: 12px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background-color 0.2s;
}

.new-chat-button:hover {
    background-color: var(--bg-hover);
}

.new-chat-button::before {
    content: '+';
    font-size: 20px;
    font-weight: 300;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    flex-shrink: 0; /* Prevent footer from shrinking */
    background-color: var(--bg-primary); /* Ensure background */
    z-index: 1002; /* Ensure it's above input area */
    position: relative;
}

.logout-button {
    width: 100%;
    padding: 12px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

.logout-button:hover {
    background-color: var(--error-color);
    border-color: var(--error-color);
    color: white;
}

.logout-icon {
    font-size: 18px;
}

.logout-text {
    font-weight: 500;
}

/* Conversations List */
.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
    padding-bottom: 120px; /* Extra space to ensure logout button is visible */
}

.conversations-list::-webkit-scrollbar {
    width: 8px;
}

.conversations-list::-webkit-scrollbar-track {
    background: transparent;
}

.conversations-list::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.conversation-item {
    padding: 12px;
    margin-bottom: 4px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.conversation-item:hover {
    background-color: var(--bg-hover);
}

.conversation-item.active {
    background-color: var(--bg-secondary);
}

.conversation-item::before {
    content: '💬';
    font-size: 16px;
}

.conversation-title {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-time {
    font-size: 11px;
    color: var(--text-tertiary);
}

.delete-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.2s, background-color 0.2s;
}

.conversation-item:hover .delete-btn {
    opacity: 1;
}

.delete-btn:hover {
    background-color: var(--error-color);
    color: white;
}

/* Sidebar Toggle Button */
.sidebar-toggle {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1001;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color 0.2s, opacity 0.3s, visibility 0.3s;
    font-size: 20px;
    line-height: 1;
    display: none;
}

.sidebar-toggle:hover {
    background-color: var(--bg-hover);
}

.sidebar-toggle::before {
    content: '☰';
}

/* Hide toggle button when sidebar is open on mobile */
@media (max-width: 768px) {
    .sidebar.open ~ .chat-area .sidebar-toggle {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    position: relative;
}

/* Model Selector */
.model-selector-container {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

#model-select {
    width: 100%;
    max-width: 300px;
    padding: 8px 12px 8px 36px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="%23ececec" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="3"/><path d="M12 1v6m0 6v6m6-12h-6m-6 0H1m11 6h6m-6 0H1"/></svg>');
    background-repeat: no-repeat;
    background-position: 8px center;
    background-size: 20px 20px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

#model-select:focus {
    outline: none;
    border-color: var(--accent-color);
}

#model-select option {
    padding: 8px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* Chat History */
.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    padding-bottom: 100px;
    padding-top: 20px; /* Ensure consistent padding at the top */
    display: flex;
    flex-direction: column;
}

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

.chat-history::-webkit-scrollbar-track {
    background: transparent;
}

.chat-history::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 40px;
    padding-top: 80px; /* Add extra padding at the top to prevent content from being cut off by the fixed menu */
}

.welcome-logo {
    width: 120px;
    height: 120px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.welcome-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.welcome-title {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.welcome-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.welcome-suggestions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    max-width: 800px;
    width: 100%;
}

.suggestion-card {
    padding: 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
    text-align: left;
}

.suggestion-card:hover {
    background-color: var(--bg-hover);
    transform: translateY(-2px);
}

.suggestion-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.suggestion-text {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Messages */
.message {
    display: flex;
    gap: 16px;
    padding: 24px 0;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 18px;
}

.user-message .message-avatar {
    background-color: var(--accent-color);
}

.assistant-message .message-avatar {
    background: linear-gradient(135deg, var(--portuguese-green), var(--accent-color));
}

.message-content-wrapper {
    flex: 1;
    min-width: 0;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.message-role {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.message-model {
    font-size: 12px;
    color: var(--text-tertiary);
    font-style: italic;
}

.message-content {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    overflow-x: auto;
}

.message-content p {
    margin-bottom: 12px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.message-content em {
    font-style: italic;
}

.message-content code {
    background-color: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: var(--text-primary);
}

.message-content pre {
    background-color: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 12px 0;
    max-width: 100%;
    word-wrap: break-word;
    white-space: pre-wrap;
    box-sizing: border-box;
}

.message-content pre code {
    background: none;
    padding: 0;
}

.message-content ul,
.message-content ol {
    margin-left: 24px;
    margin-bottom: 12px;
}

.message-content li {
    margin-bottom: 6px;
}

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

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

/* Reasoning Block (for OpenAI models) */
.reasoning-block {
    background-color: var(--bg-secondary);
    border-left: 3px solid var(--accent-color);
    padding: 16px;
    margin: 12px 0;
    border-radius: 8px;
    font-style: italic;
    color: var(--text-secondary);
}

.reasoning-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 8px;
    font-size: 14px;
    font-style: normal;
}

.reasoning-header::before {
    content: '🧠';
    font-size: 16px;
}

.reasoning-content {
    font-size: 14px;
    line-height: 1.6;
}

.reasoning-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    margin-left: auto;
    transition: background-color 0.2s, color 0.2s;
}

.reasoning-toggle:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.reasoning-block.collapsed .reasoning-content {
    display: none;
}

/* Message Actions */
.message-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    opacity: 0;
    transition: opacity 0.2s;
    position: relative;
    z-index: 10;
}

.message:hover .message-actions {
    opacity: 1;
}

.message-action-button {
    padding: 6px 12px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.message-action-button:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.message-action-button.copied {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 0;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-tertiary);
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-8px);
    }
}

/* Input Area */
.input-area {
    padding: 20px;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    position: sticky;
    bottom: 0;
    z-index: 5;
}

/* Ensure input area doesn't overlap with sidebar in mobile view */
@media (max-width: 768px) {
    .sidebar.open ~ .chat-area .input-area {
        margin-left: 0;
    }
    
    /* Ensure proper stacking context */
    .chat-area {
        position: relative;
        z-index: 1;
    }
    
    .input-area {
        z-index: 100; /* Higher than message actions to stay on top */
    }
    
    /* Ensure sidebar is properly positioned */
    .sidebar {
        z-index: 1000;
    }
    
    /* Ensure sidebar footer is above input area */
    .sidebar-footer {
        z-index: 1002;
    }
    
    /* Ensure sidebar toggle is above other elements */
    .sidebar-toggle {
        z-index: 1003;
    }
    
    /* Message actions should be below input area */
    .message-actions {
        z-index: 1;
    }
}

.input-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    padding: 12px;
    transition: border-color 0.2s;
}

.input-wrapper:focus-within {
    border-color: var(--accent-color);
}

/* Attachment Menu */
.attachment-menu-container {
    position: relative;
}

.attachment-menu-button {
    width: 36px;
    height: 36px;
    background-color: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 300;
    transition: background-color 0.2s, color 0.2s, transform 0.2s;
}

.attachment-menu-button:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.attachment-menu-button.active {
    transform: rotate(45deg);
    background-color: var(--bg-hover);
}

.attachment-menu {
    position: absolute;
    bottom: 100%;
    left: 0;
    margin-bottom: 8px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px;
    min-width: 200px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
}

@media (max-width: 768px) {
    .attachment-menu {
        width: auto; /* Let it size to content */
        min-width: 200px;
        max-width: 280px;
        left: 0;
    }
}

.attachment-menu-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background-color: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color 0.2s;
    text-align: left;
}

.attachment-menu-item:hover {
    background-color: var(--bg-hover);
}

.attachment-menu-item:disabled,
.attachment-menu-item.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.attachment-menu-item:disabled:hover,
.attachment-menu-item.disabled:hover {
    background-color: transparent;
}

/* Tools Menu */
.tools-menu-container {
    position: relative;
}

.tools-menu-button {
    width: 36px;
    height: 36px;
    background-color: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s;
}

.tools-menu-button:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.tools-menu-button.active {
    background-color: var(--bg-hover);
}

.tools-menu-button.tool-selected {
    color: var(--accent-color);
}

.tools-menu-button.tool-selected:hover {
    background-color: var(--bg-hover);
    color: var(--accent-color);
}

.tools-icon {
    font-size: 18px;
}

.tools-menu {
    position: absolute;
    bottom: 100%;
    left: 0;
    margin-bottom: 8px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px;
    min-width: 260px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
}

@media (max-width: 768px) {
    .tools-menu {
        width: auto; /* Let it size to content */
        min-width: 200px;
        max-width: 280px;
        left: 0;
    }
}

.tools-menu-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background-color: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color 0.2s;
    text-align: left;
}

.tools-menu-item:hover {
    background-color: var(--bg-hover);
}

.tools-menu-item:disabled,
.tools-menu-item.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.tools-menu-item:disabled:hover,
.tools-menu-item.disabled:hover {
    background-color: transparent;
}

.menu-icon {
    font-size: 20px;
    width: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-text {
    font-size: 14px;
    flex: 1;
}

#message-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 15px;
    resize: none;
    max-height: 200px;
    min-height: 24px;
    line-height: 24px;
    outline: none;
    font-family: inherit;
}

#message-input::placeholder {
    color: var(--text-tertiary);
}

#send-button {
    width: 36px;
    height: 36px;
    background-color: var(--accent-color);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: background-color 0.2s;
    flex-shrink: 0;
}

#send-button:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

#send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#send-button::before {
    content: '↑';
}

/* Voice Record Button */
.voice-record-button {
    width: 36px;
    height: 36px;
    background-color: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: background-color 0.2s, color 0.2s, transform 0.2s;
    flex-shrink: 0;
    position: relative;
}

.voice-record-button:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.voice-record-button.recording {
    background-color: var(--error-color);
    color: white;
    animation: pulse-recording 1.5s ease-in-out infinite;
}

.voice-record-button.recording .voice-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background-color: white;
    border-radius: 2px;
}

.voice-record-button.transcribing {
    background-color: var(--accent-color);
    color: white;
    animation: pulse-transcribing 1.5s ease-in-out infinite;
}

@keyframes pulse-transcribing {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(16, 163, 127, 0.7);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(16, 163, 127, 0);
    }
}

@keyframes pulse-recording {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
    }
}

/* Voice Recording Indicator */
.voice-recording-indicator {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 12px;
    padding: 10px 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.voice-recording-indicator .recording-dot {
    width: 8px;
    height: 8px;
    background-color: var(--error-color);
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

.voice-recording-indicator .recording-time {
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

.voice-recording-indicator .cancel-recording {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
    margin-left: 8px;
}

.voice-recording-indicator .cancel-recording:hover {
    background-color: var(--error-color);
    color: white;
}

/* File Upload Preview */
.file-preview-container {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.file-preview {
    position: relative;
    padding: 8px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.file-preview-icon {
    font-size: 16px;
}

.file-preview-name {
    color: var(--text-primary);
}

.file-preview-remove {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
}

.file-preview-remove:hover {
    background-color: var(--error-color);
    color: white;
}

/* Image Preview */
.image-preview {
    max-width: 200px;
    max-height: 200px;
    border-radius: 8px;
    object-fit: cover;
}

/* Stop Generation Button */
.stop-generation {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 12px;
    padding: 10px 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    transition: background-color 0.2s;
}

.stop-generation:hover {
    background-color: var(--bg-hover);
}

.stop-generation::before {
    content: '⏹';
    font-size: 16px;
}

/* Code Block Container */
.code-block-container {
    position: relative;
    margin: 12px 0;
    max-width: 100%;
    overflow: hidden;
    box-sizing: border-box;
}

.code-block {
    background-color: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
    max-width: 100%;
}

.copy-code-button {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 6px 12px;
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.copy-code-button:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    margin: 12px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

td {
    color: var(--text-secondary);
}

tr:last-child td {
    border-bottom: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        z-index: 1000;
        transform: translateX(-100%);
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.3);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-toggle {
        position: static;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0;
        flex-shrink: 0;
    }
    
    /* Mobile adjustments for user info */
    .user-info {
        padding: 8px;
        margin-bottom: 8px;
    }
    
    .user-avatar {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }
    
    .user-email {
        font-size: 11px;
    }
    
    /* Mobile adjustments for logout button */
    .sidebar-footer {
        padding: 8px;
        margin-bottom: 100px; /* Extra space to prevent hiding behind input area */
    }
    
    .logout-button {
        padding: 8px;
        font-size: 12px;
    }
    
    .logout-icon {
        font-size: 14px;
    }
    
    .model-selector-container {
        padding-left: 12px;
    }
    
    /* Adjust chat area for mobile */
    .chat-history {
        padding: 12px;
        padding-bottom: 120px; /* Extra space to prevent content from hiding behind input area */
        padding-top: 20px; /* Ensure content doesn't get hidden behind the fixed menu */
    }
    
    .message {
        padding: 16px 0;
        gap: 12px;
    }
    
    .message-avatar {
        width: 28px;
        height: 28px;
        font-size: 16px;
    }
    
    .message-content {
        font-size: 14px;
    }
    
    /* Welcome screen adjustments */
    .welcome-screen {
        padding: 20px;
        padding-top: 70px; /* Add extra padding at the top for mobile */
    }
    
    .welcome-logo {
        width: 80px;
        height: 80px;
        margin-bottom: 16px;
    }
    
    .welcome-title {
        font-size: 24px;
        margin-bottom: 12px;
    }
    
    .welcome-subtitle {
        font-size: 14px;
        margin-bottom: 24px;
    }
    
    .welcome-suggestions {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .suggestion-card {
        padding: 12px;
    }
    
    /* Input area adjustments */
    .input-area {
        padding: 12px 10px;
    }
    
    .input-wrapper {
        padding: 8px;
        gap: 8px;
    }
    
    #message-input {
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    .attachment-menu-button,
    .tools-menu-button,
    .voice-record-button,
    #send-button {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }
    
    /* Model selector adjustments */
    .model-selector-container {
        padding: 8px 12px;
        position: sticky;
        top: 0;
        z-index: 1000;
    }
    
    #model-select {
        max-width: 100%;
        font-size: 14px;
        padding: 8px 12px 8px 32px;
        background-size: 16px 16px;
        background-position: 6px center;
    }
    
    /* Message actions */
    .message-actions {
        opacity: 1; /* Always show on mobile */
        flex-wrap: wrap;
    }
    
    .message-action-button {
        font-size: 12px;
        padding: 4px 8px;
    }
    
    /* Adjust button order for mobile */
    .message-actions {
        flex-wrap: wrap;
    }
    
    /* Code blocks */
    .message-content pre {
        font-size: 12px;
        padding: 12px;
    }
    
    .copy-code-button {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    /* Attachment menu */
    .attachment-menu {
        min-width: 180px;
        left: 0;
        right: auto;
        max-width: 90vw; /* Ensure it doesn't exceed viewport width */
    }
    
    .tools-menu {
        min-width: 200px;
        left: 0;
        right: auto;
        max-width: 90vw; /* Ensure it doesn't exceed viewport width */
    }
    
    .attachment-menu-item,
    .tools-menu-item {
        padding: 10px;
    }
    
    .menu-text {
        font-size: 13px;
    }
    
    /* File preview */
    .file-preview {
        font-size: 12px;
        padding: 6px 10px;
    }
    
    .image-preview {
        max-width: 150px;
        max-height: 150px;
    }
    
    /* Reasoning block */
    .reasoning-block {
        padding: 12px;
        margin: 8px 0;
    }
    
    .reasoning-content {
        font-size: 13px;
    }
}

/* Extra small devices */
@media (max-width: 480px) {
    .welcome-title {
        font-size: 20px;
    }
    
    .welcome-subtitle {
        font-size: 13px;
    }
    
    .message-content {
        font-size: 13px;
    }
    
    .sidebar {
        width: 280px;
    }
    
    /* Adjust input area for very small screens */
    .input-area {
        padding: 8px;
    }
    
    .input-wrapper {
        padding: 6px;
        gap: 6px;
    }
    
    .attachment-menu-button,
    .tools-menu-button,
    .voice-record-button,
    #send-button {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }
    
    /* Ensure menus don't go off-screen */
    .attachment-menu,
    .tools-menu {
        max-width: 280px;
        width: auto;
        left: 0;
    }
}

/* Hidden Elements */
.hidden {
    display: none !important;
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}

/* Footer */
footer {
    display: none; /* Hide footer for ChatGPT-like experience */
}

/* Terms of Use Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    font-size: 28px;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s, color 0.2s;
    z-index: 10;
}

.modal-close:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-body h2 {
    margin-top: 0;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.modal-body p {
    margin-bottom: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-body strong {
    color: var(--text-primary);
}