:root {
    /* Gemini Color Scheme */
    --gemini-background: #ffffff;
    --gemini-surface: #f8f9fa;
    --gemini-surface-2: #f1f3f4;
    --gemini-primary: #1a73e8;
    --gemini-primary-hover: #1669d6;
    --gemini-secondary: #5f6368;
    --gemini-text-primary: #202124;
    --gemini-text-secondary: #5f6368;
    --gemini-text-tertiary: #80868b;
    --gemini-border: #dadce0;
    --gemini-border-light: #e8eaed;
    --gemini-shadow: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
    --gemini-message-user: #e3f2fd;
    --gemini-message-assistant: #f8f9fa;
    --gemini-warning: #fce8e6;
    --gemini-code-bg: #f1f3f4;
    --sidebar-width: 280px;
}

[data-theme="dark"] {
    --gemini-background: #202124;
    --gemini-surface: #292a2d;
    --gemini-surface-2: #35363a;
    --gemini-primary: #8ab4f8;
    --gemini-primary-hover: #a8c7fa;
    --gemini-secondary: #9aa0a6;
    --gemini-text-primary: #e8eaed;
    --gemini-text-secondary: #9aa0a6;
    --gemini-text-tertiary: #80868b;
    --gemini-border: #3c4043;
    --gemini-border-light: #5f6368;
    --gemini-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.3), 0 1px 3px 1px rgba(0, 0, 0, 0.15);
    --gemini-message-user: #1e3a5f;
    --gemini-message-assistant: #292a2d;
    --gemini-warning: #3c2b2a;
    --gemini-code-bg: #2d2e31;
}

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

body {
    font-family: 'Google Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--gemini-background);
    color: var(--gemini-text-primary);
    height: 100vh;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.gemini-container {
    display: flex;
    height: 100vh;
    max-width: 100%;
}

/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    background: var(--gemini-surface);
    border-right: 1px solid var(--gemini-border);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--gemini-border);
}

.new-chat-btn {
    width: 100%;
    padding: 12px 16px;
    background: var(--gemini-primary);
    color: white;
    border: none;
    border-radius: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.new-chat-btn:hover {
    background: var(--gemini-primary-hover);
}

.sidebar-toggle {
    display: none;
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--gemini-text-secondary);
    cursor: pointer;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    color: var(--gemini-text-secondary);
    font-size: 14px;
    position: relative;
}

.history-item:hover {
    background: var(--gemini-surface-2);
}

.history-item.active {
    background: var(--gemini-surface-2);
    color: var(--gemini-primary);
}

.history-item .material-symbols-outlined {
    font-size: 18px;
}

.history-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.delete-chat {
    opacity: 0;
    background: none;
    border: none;
    color: var(--gemini-text-tertiary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.history-item:hover .delete-chat {
    opacity: 1;
}

.delete-chat:hover {
    color: var(--gemini-primary);
    background: var(--gemini-surface);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--gemini-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--gemini-primary), #34a853);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 500;
    font-size: 14px;
}

.user-name {
    font-size: 14px;
    color: var(--gemini-text-primary);
}

.settings-btn {
    background: none;
    border: none;
    color: var(--gemini-text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.settings-btn:hover {
    background: var(--gemini-surface-2);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    border-bottom: 1px solid var(--gemini-border);
    background: var(--gemini-background);
    min-height: 64px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--gemini-text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
}

.menu-toggle:hover {
    background: var(--gemini-surface);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gemini-text-secondary);
}

.breadcrumb .material-symbols-outlined {
    font-size: 18px;
}

.current-chat {
    color: var(--gemini-text-primary);
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Mode Selector in Header */
.mode-selector {
    display: flex;
    background: var(--gemini-surface);
    border: 1px solid var(--gemini-border);
    border-radius: 12px;
    padding: 4px;
    margin-right: 12px;
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--gemini-text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.mode-btn.active {
    background: var(--gemini-primary);
    color: white;
    box-shadow: 0 2px 4px rgba(26, 115, 232, 0.2);
}

.mode-btn:hover:not(.active) {
    background: var(--gemini-surface-2);
    color: var(--gemini-text-primary);
}

.mode-btn .material-symbols-outlined {
    font-size: 16px;
}

.header-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gemini-text-secondary);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.header-btn:hover {
    background: var(--gemini-surface);
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
}

.welcome-content {
    max-width: 800px;
    text-align: center;
}

.welcome-icon {
    margin-bottom: 24px;
}

.gemini-logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--gemini-primary), #34a853);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 32px;
    font-weight: 700;
    margin: 0 auto;
}

.welcome-content h1 {
    font-size: 32px;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--gemini-text-primary);
}

.welcome-subtitle {
    font-size: 16px;
    color: var(--gemini-text-secondary);
    margin-bottom: 48px;
}

/* Mode Explanation on Welcome Screen */
.mode-explanation {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
    max-width: 900px;
}

.mode-card {
    padding: 24px;
    background: var(--gemini-surface);
    border: 2px solid var(--gemini-border);
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
    opacity: 0.6;
    transform: scale(0.95);
}

.mode-card.active {
    opacity: 1;
    transform: scale(1);
    border-color: var(--gemini-primary);
    box-shadow: 0 8px 24px rgba(26, 115, 232, 0.15);
}

.mode-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--gemini-primary), #34a853);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: white;
}

.mode-icon .material-symbols-outlined {
    font-size: 28px;
}

.mode-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--gemini-text-primary);
}

.mode-card p {
    font-size: 14px;
    color: var(--gemini-text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
}

.mode-card ul {
    text-align: left;
    font-size: 13px;
    color: var(--gemini-text-secondary);
    padding-left: 16px;
}

.mode-card li {
    margin-bottom: 6px;
    line-height: 1.4;
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 48px;
}

.capability-card {
    padding: 24px;
    background: var(--gemini-surface);
    border-radius: 12px;
    border: 1px solid var(--gemini-border);
    text-align: center;
    transition: transform 0.2s ease;
}

.capability-card:hover {
    transform: translateY(-2px);
}

.capability-card .material-symbols-outlined {
    font-size: 32px;
    color: var(--gemini-primary);
    margin-bottom: 12px;
}

.capability-card h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--gemini-text-primary);
}

.capability-card p {
    font-size: 14px;
    color: var(--gemini-text-secondary);
    line-height: 1.4;
}

.quick-prompts {
    max-width: 600px;
    margin: 0 auto;
}

.quick-prompts h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--gemini-text-secondary);
}

.prompt-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.prompt-chip {
    padding: 12px 16px;
    background: var(--gemini-surface);
    border: 1px solid var(--gemini-border);
    border-radius: 20px;
    color: var(--gemini-text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.prompt-chip:hover {
    background: var(--gemini-surface-2);
    border-color: var(--gemini-primary);
}

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    display: none;
    scroll-behavior: smooth;
}

.message {
    padding: 24px;
    border-bottom: 1px solid var(--gemini-border);
    animation: messageSlideIn 0.3s ease-out;
}

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

.message-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    gap: 16px;
}

.message-avatar {
    flex-shrink: 0;
}

.gemini-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gemini-primary), #34a853);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 14px;
}

.user-avatar {
    background: linear-gradient(135deg, #1a73e8, #34a853);
}

.gemini-avatar.thinking {
    animation: gentlePulse 2s ease-in-out infinite;
}

@keyframes gentlePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.message-text {
    flex: 1;
    min-width: 0;
    line-height: 1.6;
    font-size: 15px;
    color: var(--gemini-text-primary);
}

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

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

.message-content-text {
    line-height: 1.6;
    font-size: 15px;
    color: var(--gemini-text-primary);
}

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

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

/* Message Files */
.message-files {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.file-preview {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    background: var(--gemini-surface);
    border: 1px solid var(--gemini-border);
    border-radius: 8px;
    font-size: 12px;
    color: var(--gemini-text-secondary);
}

.file-preview .material-symbols-outlined {
    font-size: 16px;
}

/* Message Mode Indicators */
.message-mode-indicator {
    display: inline-block;
    padding: 2px 8px;
    background: var(--gemini-surface);
    border: 1px solid var(--gemini-border);
    border-radius: 10px;
    font-size: 10px;
    color: var(--gemini-text-secondary);
    margin-left: 8px;
    vertical-align: middle;
}

.message-time {
    font-size: 12px;
    color: var(--gemini-text-tertiary);
    margin-top: 8px;
}

/* User Message Specific */
.message.user-message {
    background: var(--gemini-surface);
    margin: 0 -24px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gemini-border);
}

.message.user-message .message-content {
    background: var(--gemini-message-user);
    padding: 16px;
    border-radius: 12px;
    margin-left: 48px;
    border: 1px solid var(--gemini-border);
}

/* Assistant Message Specific */
.message.assistant-message .message-content {
    background: var(--gemini-message-assistant);
    padding: 16px;
    border-radius: 12px;
    border: 1px solid var(--gemini-border);
}

/* Code Blocks */
.code-block {
    background: var(--gemini-code-bg);
    border: 1px solid var(--gemini-border);
    border-radius: 8px;
    margin: 12px 0;
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--gemini-surface);
    border-bottom: 1px solid var(--gemini-border);
    font-size: 12px;
    color: var(--gemini-text-secondary);
}

.code-language {
    font-weight: 500;
}

.copy-code {
    background: none;
    border: none;
    color: var(--gemini-text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: background-color 0.2s ease;
}

.copy-code:hover {
    background: var(--gemini-surface-2);
}

.code-content {
    padding: 12px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    overflow-x: auto;
    white-space: pre-wrap;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.quick-action-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: var(--gemini-surface);
    border: 1px solid var(--gemini-border);
    border-radius: 16px;
    color: var(--gemini-text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.quick-action-btn:hover {
    background: var(--gemini-surface-2);
    border-color: var(--gemini-primary);
    color: var(--gemini-primary);
}

/* Thinking Indicator */
.thinking-indicator {
    display: none;
    padding: 24px;
    border-bottom: 1px solid var(--gemini-border);
}

.thinking-indicator.active {
    display: block;
}

.thinking-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    gap: 16px;
    align-items: center;
}

.thinking-dots {
    display: flex;
    gap: 4px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gemini-text-tertiary);
    animation: dotPulse 1.4s ease-in-out infinite both;
}

.dot:nth-child(1) { animation-delay: -0.32s; }
.dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes dotPulse {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.thinking-text {
    font-size: 14px;
    color: var(--gemini-text-secondary);
}

/* Mode Indicator in Thinking State */
.mode-indicator {
    font-size: 12px;
    color: var(--gemini-text-tertiary);
    margin-top: 4px;
}

/* Input Footer */
.input-footer {
    background: var(--gemini-background);
    border-top: 1px solid var(--gemini-border);
    padding: 16px 24px 24px;
}

.input-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: flex-end;
    gap: 12px;
}

.input-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.action-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gemini-text-secondary);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.action-btn:hover {
    background: var(--gemini-surface);
}

.action-btn:focus-visible {
    outline: 2px solid var(--gemini-primary);
    outline-offset: 2px;
}

.input-wrapper {
    flex: 1;
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background: var(--gemini-surface);
    border: 1px solid var(--gemini-border);
    border-radius: 24px;
    padding: 12px 16px;
    transition: all 0.2s ease;
}

.input-wrapper:focus-within {
    border-color: var(--gemini-primary);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

#messageInput {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--gemini-text-primary);
    font-family: inherit;
    font-size: 15px;
    line-height: 1.5;
    resize: none;
    outline: none;
    max-height: 120px;
    min-height: 24px;
}

#messageInput::placeholder {
    color: var(--gemini-text-tertiary);
}

/* Current Mode Indicator in Input */
.current-mode {
    display: flex;
    align-items: center;
}

.mode-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    background: var(--gemini-primary);
    color: white;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.mode-badge .material-symbols-outlined {
    font-size: 14px;
}

.mode-badge.web {
    background: #34a853;
}

.mode-badge.auto {
    background: #9c27b0;
}

.input-options {
    display: flex;
    gap: 8px;
}

.option-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--gemini-border);
    border-radius: 16px;
    color: var(--gemini-text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-btn.active {
    background: var(--gemini-primary);
    color: white;
    border-color: var(--gemini-primary);
}

.option-btn:hover {
    background: var(--gemini-surface-2);
}

.option-btn:focus-visible {
    outline: 2px solid var(--gemini-primary);
    outline-offset: 2px;
}

.send-button {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--gemini-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s ease;
    flex-shrink: 0;
}

.send-button:hover:not(:disabled) {
    background: var(--gemini-primary-hover);
}

.send-button:disabled {
    background: var(--gemini-text-tertiary);
    cursor: not-allowed;
    opacity: 0.6;
}

.send-button:focus-visible {
    outline: 2px solid var(--gemini-primary);
    outline-offset: 2px;
}

.input-hint {
    max-width: 800px;
    margin: 8px auto 0;
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--gemini-text-tertiary);
}

/* Enhanced input hint for mode information */
#modeHint {
    font-weight: 500;
    color: var(--gemini-primary);
}

/* Upload Preview */
.upload-preview {
    max-width: 800px;
    margin: 12px auto 0;
    background: var(--gemini-surface);
    border: 1px solid var(--gemini-border);
    border-radius: 12px;
    padding: 12px;
    display: none;
}

.upload-preview.active {
    display: block;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--gemini-text-secondary);
}

.clear-preview {
    background: none;
    border: none;
    color: var(--gemini-text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.clear-preview:hover {
    background: var(--gemini-surface-2);
}

.preview-items {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.preview-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    background: var(--gemini-background);
    border: 1px solid var(--gemini-border);
    border-radius: 8px;
    font-size: 12px;
}

.preview-item img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
}

.preview-item button {
    background: none;
    border: none;
    color: var(--gemini-text-tertiary);
    cursor: pointer;
    padding: 2px;
    border-radius: 2px;
}

.preview-item button:hover {
    background: var(--gemini-surface);
    color: var(--gemini-primary);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--gemini-background);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--gemini-shadow);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--gemini-border);
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 500;
}

.modal-close {
    background: none;
    border: none;
    color: var(--gemini-text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.modal-close:hover {
    background: var(--gemini-surface);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
}

.setting-group {
    margin-bottom: 24px;
}

.setting-group h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--gemini-text-primary);
}

/* Mode Options in Settings */
.mode-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mode-option {
    display: flex;
    align-items: center;
    padding: 12px;
    border: 1px solid var(--gemini-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-option:hover {
    background: var(--gemini-surface);
    border-color: var(--gemini-primary);
}

.mode-option input[type="radio"] {
    margin-right: 12px;
}

.mode-option-content {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gemini-text-primary);
}

.mode-option-content .material-symbols-outlined {
    font-size: 18px;
    color: var(--gemini-primary);
}

.setting-select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--gemini-border);
    border-radius: 8px;
    background: var(--gemini-background);
    color: var(--gemini-text-primary);
    font-family: inherit;
    font-size: 14px;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    color: var(--gemini-text-primary);
}

.toggle-label input {
    display: none;
}

.toggle-slider {
    width: 40px;
    height: 20px;
    background: var(--gemini-border);
    border-radius: 10px;
    position: relative;
    transition: background-color 0.2s ease;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.2s ease;
}

.toggle-label input:checked + .toggle-slider {
    background: var(--gemini-primary);
}

.toggle-label input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

.theme-options {
    display: flex;
    gap: 8px;
}

.theme-option {
    flex: 1;
    padding: 12px;
    background: var(--gemini-surface);
    border: 1px solid var(--gemini-border);
    border-radius: 8px;
    color: var(--gemini-text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-option.active {
    background: var(--gemini-primary);
    color: white;
    border-color: var(--gemini-primary);
}

.theme-option:hover {
    background: var(--gemini-surface-2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100%;
        z-index: 100;
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .menu-toggle {
        display: block;
    }

    .header-left .breadcrumb span:not(.current-chat) {
        display: none;
    }

    .mode-selector {
        margin-right: 8px;
    }
    
    .mode-btn {
        padding: 6px 8px;
        font-size: 12px;
    }
    
    .mode-btn span:last-child {
        display: none;
    }

    .mode-explanation {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .mode-card {
        padding: 20px;
    }

    .capabilities-grid {
        grid-template-columns: 1fr;
    }

    .input-container {
        gap: 8px;
    }

    .input-actions {
        flex-direction: row;
    }

    .option-label {
        display: none;
    }

    .input-hint {
        flex-direction: column;
        gap: 4px;
        text-align: center;
    }

    .history-item {
        padding: 10px;
    }
    
    .delete-chat {
        opacity: 1; /* Always show on mobile */
    }
    
    .file-preview {
        padding: 4px 8px;
        font-size: 11px;
    }
    
    .quick-actions {
        gap: 6px;
    }
    
    .quick-action-btn {
        padding: 4px 8px;
        font-size: 11px;
    }

    .message.user-message {
        margin: 0 -16px;
        padding: 16px;
    }
    
    .message.user-message .message-content {
        margin-left: 0;
    }
    
    .input-footer {
        padding: 16px;
    }
    
    .input-wrapper {
        padding: 8px 12px;
    }
    
    .logo-text {
        display: none;
    }
}

/* Scrollbar Styling */
.chat-history::-webkit-scrollbar,
.messages-container::-webkit-scrollbar {
    width: 6px;
}

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

.chat-history::-webkit-scrollbar-thumb,
.messages-container::-webkit-scrollbar-thumb {
    background: var(--gemini-border);
    border-radius: 3px;
}

.chat-history::-webkit-scrollbar-thumb:hover,
.messages-container::-webkit-scrollbar-thumb:hover {
    background: var(--gemini-text-tertiary);
}

/* Enhanced focus states for accessibility */
.option-btn:focus-visible,
.history-item:focus-visible {
    outline: 2px solid var(--gemini-primary);
    outline-offset: 2px;
}