:root {
    --bg-color: #0f1115;
    --surface-color: #171920;
    --surface-hover: #222530;
    --border-color: #2e3240;
    --text-color: #e2e8f0;
    --text-muted: #94a3b8;
    --input-bg: rgba(23, 25, 32, 0.7);
    --primary-color: #9d4edd;
    --primary-hover: #7b2cbf;
    --primary-gradient: linear-gradient(135deg, #00f0ff, #8a2be2);
    --neon-glow: 0 0 10px rgba(138, 43, 226, 0.5);
    --glass-blur: blur(12px);
    --msg-user-bg: #272a38;
}

body.light-mode {
    --bg-color: #f1f5f9;
    --surface-color: #ffffff;
    --surface-hover: #f8fafc;
    --border-color: #e2e8f0;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --input-bg: rgba(255, 255, 255, 0.7);
    --msg-user-bg: #e0e7ff;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    display: flex;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #4a4a5a;
    border-radius: 5px;
    border: 2px solid var(--bg-color);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.theme-toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 18px;
    padding: 5px;
    border-radius: 50%;
    transition: 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle-btn:hover {
    color: var(--text-color);
    background: var(--surface-hover);
}

.new-chat-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background 0.2s;
}

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

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.history-item {
    padding: 12px;
    margin-bottom: 5px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 14px;
}

.history-item:hover, .history-item.active {
    background: var(--surface-hover);
    color: var(--text-color);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 15px;
}

/* App Wrapper for Split View */
.app-wrapper {
    flex: 1;
    display: flex;
    overflow: hidden;
    min-height: 0;
    min-width: 0;
}

/* Main Chat Area */
.main-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: width 0.3s ease;
    min-height: 0;
    min-width: 0;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-color);
}
.chat-header h2 {
    font-size: 16px;
    margin: 0;
    color: var(--text-muted);
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    scroll-behavior: smooth;
}

.message {
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    padding: 10px 0;
    animation: fadeSlideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.message.user {
    justify-content: flex-end;
}

/* User Bubble */
.message.user .message-content {
    background: var(--msg-user-bg);
    padding: 12px 20px;
    border-radius: 20px;
    line-height: 1.6;
    font-size: 15px;
    max-width: 80%;
    word-break: break-word;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.message-body {
    display: flex;
    flex-direction: column;
    max-width: 100%;
}
.message-actions {
    display: flex;
    gap: 10px;
    margin-top: 5px;
    opacity: 0;
    transition: opacity 0.2s ease;
}
.message:hover .message-actions {
    opacity: 1;
}
.message.user .message-body {
    align-items: flex-end;
}
.message-actions.user-actions {
    justify-content: flex-end;
}
.copy-message-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 13px;
    padding: 4px 8px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s;
}
.copy-message-btn:hover {
    background: var(--surface-color);
    color: var(--text-color);
}

/* AI Text (No Bubble) */
.message:not(.user) .message-content {
    background: transparent;
    padding: 10px 0;
    border: none;
    line-height: 1.7;
    font-size: 15px;
    width: 100%;
    color: var(--text-color);
    word-break: break-word;
    overflow-x: auto;
}

/* MathJax Overflow Handling */
mjx-container[display="true"] {
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 10px 0;
}

/* Markdown Styling for AI */
.message:not(.user) .message-content h1,
.message:not(.user) .message-content h2,
.message:not(.user) .message-content h3 {
    margin-top: 1.2em;
    margin-bottom: 0.5em;
    font-weight: 600;
    color: var(--text-color);
}
.message:not(.user) .message-content strong {
    font-weight: 600;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

/* AI Avatar */
.ai-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    margin-right: 15px;
    margin-top: 5px;
    flex-shrink: 0;
    background: var(--surface-color);
    box-shadow: var(--neon-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 2px;
}
.ai-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}
.message:not(.user) .message-content p {
    margin-bottom: 1em;
    margin-top: 0;
}
.message:not(.user) .message-content ul,
.message:not(.user) .message-content ol {
    margin-bottom: 1em;
    padding-left: 20px;
}
.message:not(.user) .message-content li {
    margin-bottom: 0.5em;
}

/* Resizer */
.resizer {
    width: 6px;
    background: transparent;
    cursor: col-resize;
    display: none;
    z-index: 10;
    transition: background 0.2s;
}
.resizer:hover, .resizer.dragging {
    background: var(--primary-color);
}

/* Canvas Panel */
.canvas-panel {
    width: 0;
    background: var(--surface-color);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease, padding 0.3s ease;
    overflow: hidden;
}

.canvas-panel.open {
    width: 50%;
}

.canvas-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}
.canvas-header h3 {
    margin: 0;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary-color);
}

.file-selector {
    background: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 14px;
    outline: none;
    font-family: inherit;
    cursor: pointer;
}
.file-selector:focus {
    border-color: var(--primary-color);
}

.canvas-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-color);
    min-height: 0;
}

/* Canvas Document Typography */
.canvas-document {
    color: var(--text-color);
    line-height: 1.8;
    font-size: 16px;
    font-family: 'Inter', sans-serif;
}
.canvas-document h1, .canvas-document h2, .canvas-document h3 {
    color: #fff;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}
.canvas-document h1 { font-size: 2em; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
.canvas-document h2 { font-size: 1.5em; }
.canvas-document p { margin-bottom: 1.2em; }
.canvas-document ul, .canvas-document ol { padding-left: 20px; margin-bottom: 1.2em; }
.canvas-document strong { color: #fff; }

#canvas-editor {
    flex: 1;
    width: 100%;
    background: transparent;
    border: none;
    padding: 20px;
    color: #e5e5e5;
    font-family: 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: none;
    outline: none;
    box-sizing: border-box;
}

/* Input Area */
.input-area {
    padding: 20px;
    background: transparent;
    box-sizing: border-box;
}

.input-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: flex-end;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 10px;
    box-sizing: border-box;
    backdrop-filter: var(--glass-blur);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}
.input-container:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.15);
}

/* File Preview Styles */
.file-preview-container {
    max-width: 800px;
    margin: 0 auto 10px auto;
    display: flex;
}
.file-preview {
    position: relative;
    background: var(--surface-hover);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 200px;
}
.file-preview img {
    max-width: 50px;
    max-height: 50px;
    border-radius: 6px;
    object-fit: cover;
}
.preview-text {
    font-size: 13px;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.remove-file-btn {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.input-container:focus-within {
    border-color: var(--primary-color);
}

.upload-menu {
    position: absolute;
    bottom: 120%;
    left: 0;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    z-index: 10;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    min-width: 150px;
}

.upload-item {
    padding: 8px 12px;
    color: var(--text-color);
    font-size: 14px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.upload-item:hover {
    background: var(--surface-hover);
}

/* Lightbox Modal */
.lightbox-modal {
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}
.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    border-radius: 8px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.5);
    object-fit: contain;
}
.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}
.lightbox-close:hover {
    color: #bbb;
}

/* Make images inside chat clickable */
.message-content img {
    cursor: pointer;
    transition: opacity 0.2s;
}
.message-content img:hover {
    opacity: 0.8;
}

/* Image Preview Modal */
.image-preview-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.9);
    backdrop-filter: blur(5px);
}
.image-preview-modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}
.image-preview-modal .preview-content {
    max-width: 90%;
    max-height: 80vh;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    object-fit: contain;
}
.close-preview {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}
.close-preview:hover,
.close-preview:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}
.download-preview-btn {
    position: absolute;
    top: 25px;
    right: 90px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.download-preview-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 15px;
    padding: 10px;
    resize: none;
    outline: none;
    max-height: 150px;
    overflow-y: auto;
    font-family: 'Inter', sans-serif;
}
.chat-input::placeholder {
    color: var(--text-muted);
}

.actions {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}
.action-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.action-btn:hover {
    background: var(--surface-hover);
    color: var(--text-color);
}
.send-btn {
    background: var(--primary-gradient);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(138, 43, 226, 0.4);
    transition: all 0.3s ease;
}
.send-btn:hover {
    background: var(--primary-gradient);
    color: white;
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(138, 43, 226, 0.6);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 5px 0;
}
.typing-indicator span {
    width: 6px;
    height: 6px;
    background-color: var(--text-muted);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}
.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }
@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* Markdown & Code blocks */
pre {
    background: var(--input-bg);
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    position: relative;
}

code {
    font-family: 'Consolas', monospace;
    font-size: 14px;
}

/* AI Studio style layout */
.main-chat.is-welcome {
    justify-content: center;
}
.main-chat.is-welcome .chat-header {
    position: absolute;
    top: 0; left: 0; right: 0;
    z-index: 10;
}
.main-chat.is-welcome .chat-container {
    flex: 0 1 auto;
    overflow: visible;
}
.main-chat.is-welcome .input-area {
    order: 2;
    max-width: 840px;
    width: 100%;
    margin: 0 auto;
    border-top: none;
    background: transparent;
}
.main-chat.is-welcome .input-container {
    background: var(--surface-color);
    border-radius: 28px;
    padding: 8px 18px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    position: relative;
    z-index: 1;
}

@property --angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

.main-chat.is-welcome .input-container::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 30px;
    padding: 2px;
    background: conic-gradient(from var(--angle), transparent 0%, transparent 40%, #00f0ff 60%, #8a2be2 80%, transparent 100%);
    -webkit-mask: 
       linear-gradient(#fff 0 0) content-box, 
       linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: -1;
    animation: rotate-border 3s linear infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes rotate-border {
    0% { --angle: 0deg; }
    100% { --angle: 360deg; }
}
.main-chat.is-welcome .welcome-chips {
    display: flex !important;
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin: 0 auto 30px auto;
    animation: fadeSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.welcome-title {
    font-size: 42px;
    font-weight: 500;
    margin: 0;
    background: linear-gradient(to right, #fff, #a0a0a5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
body.light-mode .welcome-title {
    background: linear-gradient(to right, #1e293b, #64748b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.welcome-subtitle {
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 40px;
}
.suggestion-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}
.chip {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 12px 20px;
    border-radius: 100px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: var(--glass-blur);
    font-family: inherit;
}
.chip:hover {
    background: var(--surface-hover);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* Mobile Responsiveness */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 90;
    backdrop-filter: blur(2px);
}
.mobile-menu-btn {
    display: none;
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: -300px;
        height: 100%;
        z-index: 100;
        box-shadow: 2px 0 10px rgba(0,0,0,0.5);
    }
    .sidebar.mobile-open {
        transform: translateX(300px);
    }
    .sidebar-overlay.active {
        display: block;
    }
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        border: none;
        color: var(--text-color);
        padding: 5px;
        cursor: pointer;
    }
    .canvas-panel.open {
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        width: 100% !important;
        height: 100% !important;
        z-index: 80;
    }
    .chat-header h2 {
        font-size: 18px;
    }
    .input-container {
        border-radius: 16px;
    }
    .message.user .message-content {
        max-width: 90%;
    }
    .resizer {
        display: none !important;
    }
    .input-area {
        padding: 10px 15px;
    }
    .chat-container {
        padding: 20px 15px;
    }
}

/* AcroDrive UI Enhancements */
.acro-grid {
    flex: 1;
    overflow-y: auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    grid-auto-rows: minmax(130px, auto);
    gap: 15px;
    padding-right: 5px;
    align-content: start;
}

.acro-file-item {
    padding: 20px 15px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
}

.acro-file-item:hover {
    background: rgba(157, 78, 221, 0.1);
    border-color: rgba(157, 78, 221, 0.4);
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2), 0 0 15px rgba(157, 78, 221, 0.2);
}

.acro-file-item::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255,255,255,0.05), transparent);
    transition: left 0.6s ease;
}

.acro-file-item:hover::before {
    left: 100%;
}

.acro-file-icon {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.acro-file-item:hover .acro-file-icon {
    transform: scale(1.15) translateY(-2px);
}

.acro-file-name {
    color: var(--text-color);
    font-weight: 500;
    font-size: 13px;
    line-height: 1.2;
    transition: all 0.3s ease;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 3px;
}

.acro-file-item:hover .acro-file-name {
    color: var(--primary-color);
}

.acro-file-size {
    font-size: 11px;
    color: var(--text-muted);
    background: rgba(0,0,0,0.25);
    padding: 3px 8px;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.acro-file-item:hover .acro-file-size {
    background: rgba(157, 78, 221, 0.3);
    color: #f3e8ff;
}

/* Voice Command UI */
#mic-btn {
    transition: all 0.3s ease;
}
#mic-btn.listening {
    color: #ff4444;
    animation: pulseMic 1.5s infinite;
}

@keyframes pulseMic {
    0% { transform: scale(1); filter: drop-shadow(0 0 2px rgba(255, 68, 68, 0.5)); }
    50% { transform: scale(1.1); filter: drop-shadow(0 0 10px rgba(255, 68, 68, 0.8)); }
    100% { transform: scale(1); filter: drop-shadow(0 0 2px rgba(255, 68, 68, 0.5)); }
}

/* Canvas Toggle Switch */
.canvas-toggle-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
}

.canvas-toggle {
    display: flex;
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

.canvas-toggle-bg {
    position: absolute;
    top: 3px;
    left: 3px;
    height: calc(100% - 6px);
    width: calc(50% - 3px);
    background: var(--primary-gradient);
    border-radius: 16px;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: 0;
}

.canvas-toggle-btn {
    position: relative;
    z-index: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 13px;
    padding: 6px 16px;
    cursor: pointer;
    transition: color 0.3s ease;
    outline: none;
}

.canvas-toggle-btn.active {
    color: white;
}