:root {
    --bg-color: #1e1e1e;
    --text-color: #d4d4d4;
    --editor-bg: #252526;
    --preview-bg: #ffffff;
    --preview-text: #333333;
    --border-color: #3e3e42;
    --accent-color: #007acc;
    --toolbar-bg: #333333;

    /* Scrollbars (Default Dark) */
    --scrollbar-track: #1e1e1e;
    --scrollbar-thumb: #424242;
    --scrollbar-thumb-hover: #4f4f4f;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb);
    border-radius: 6px;
    border: 3px solid var(--scrollbar-track);
}

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

::-webkit-scrollbar-corner {
    background: var(--scrollbar-track);
}

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

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

.container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

header {
    background-color: var(--toolbar-bg);
    padding: 10px 20px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header-title-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

h1 {
    font-size: 1.2rem;
    color: #fff;
    margin: 0;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    width: 100%;
    justify-content: flex-start;
    /* Keep tools leading to the left */
}

/* Color Preview Box */
.color-preview-box {
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-right: 4px;
    border: 1px solid #fff;
    cursor: pointer;
    vertical-align: middle;
    border-radius: 2px;
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
}

/* Preview Pane Headings */
.preview-page h1,
.preview-page h2,
.preview-page h3,
.preview-page h4,
.preview-page h5,
.preview-page h6 {
    color: var(--preview-text);
    margin-top: 1em;
    margin-bottom: 0.5em;
}

.preview-page h1 {
    font-size: 2em;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.3em;
}

.preview-page h2 {
    font-size: 1.5em;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.3em;
}

.preview-page h3 {
    font-size: 1.25em;
}

.toolbar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    padding-bottom: 5px;
    align-items: center;
}

.toolbar-group {
    display: flex;
    gap: 2px;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px;
    border-radius: 4px;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.separator {
    width: 1px;
    height: 24px;
    background-color: var(--border-color);
    margin: 0 5px;
}

button {
    background-color: transparent;
    color: var(--text-color);
    border: none;
    padding: 6px;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

button:active {
    transform: scale(0.95);
}

button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.material-icons {
    font-size: 20px;
}

.btn-text {
    margin-left: 6px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Dropdowns */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-btn {
    padding: 6px 10px;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--toolbar-bg);
    min-width: 180px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.5);
    z-index: 10000;
    /* Increased z-index */
    border: 1px solid var(--border-color);
    border-radius: 4px;
    top: 100%;
    left: 0;
    /* Removed margin-top to prevent hover gap issue */
    margin-top: 0;
    padding: 5px 0;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    width: 100%;
    text-align: left;
    padding: 12px 16px;
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 14px;
}

.dropdown-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* CodeMirror Customization */
.CodeMirror {
    height: 100% !important;
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
    background-color: var(--editor-bg) !important;
    color: var(--text-color) !important;
}

.CodeMirror-gutters {
    background-color: var(--editor-bg) !important;
    border-right: 1px solid var(--border-color) !important;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 20000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: var(--toolbar-bg);
    margin: 10% auto;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 300px;
    color: var(--text-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    max-height: 80vh;
    overflow-y: auto;
}

.large-modal {
    width: 800px;
    max-width: 90%;
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.template-card {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.2s;
    display: flex;
    flex-direction: column;
}

.template-card:hover {
    transform: translateY(-2px);
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-color);
}

.template-preview {
    height: 150px;
    background-color: white;
    /* Most charts/diagrams look best on white */
    border-radius: 4px;
    margin-bottom: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.template-preview canvas {
    max-width: 100%;
    max-height: 100%;
}

.template-preview .mermaid {
    transform: scale(0.7);
    /* Scale down mermaid diagrams */
}

.template-title {
    font-weight: bold;
    text-align: center;
    font-size: 0.9rem;
}

.close-modal {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-modal:hover {
    color: white;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group input {
    width: 100%;
    padding: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    color: white;
    border-radius: 4px;
}

.primary-btn {
    background-color: var(--accent-color);
    color: white;
    width: 100%;
    padding: 10px;
    margin-top: 10px;
}

.primary-btn:hover {
    background-color: #0062a3;
}

/* Drag and Drop Visual Feedback */
.editor-pane.drag-over {
    border: 2px dashed var(--accent-color);
    background-color: rgba(0, 122, 204, 0.1);
}

/* Drag & Drop Overlay */
.drag-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 30000;
    justify-content: center;
    align-items: center;
    transition: all 0.3s ease;
}

.drag-overlay.active {
    display: flex;
}

.drag-content {
    background-color: var(--toolbar-bg);
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    border: 2px dashed var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    max-width: 400px;
    width: 90%;
}

.drag-overlay.active .drag-content {
    transform: scale(1);
}

.drag-icon {
    font-size: 64px;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.drag-content h3 {
    margin-bottom: 10px;
    color: var(--text-color);
}

.drag-content p {
    color: var(--text-color);
    opacity: 0.7;
    font-size: 0.9rem;
}

/* Error State */
.drag-overlay.error .drag-content {
    border-color: #ff4444;
    background-color: rgba(255, 68, 68, 0.1);
}

.drag-overlay.error .drag-icon {
    color: #ff4444;
}

.drag-overlay.error .drag-content {
    animation: shake 0.5s cubic-bezier(.36, .07, .19, .97) both;
}

@keyframes shake {

    10%,
    90% {
        transform: translate3d(-1px, 0, 0);
    }

    20%,
    80% {
        transform: translate3d(2px, 0, 0);
    }

    30%,
    50%,
    70% {
        transform: translate3d(-4px, 0, 0);
    }

    40%,
    60% {
        transform: translate3d(4px, 0, 0);
    }
}

/* Loader */
.drag-loader {
    display: none;
    width: 40px;
    height: 40px;
    margin: 20px auto 0;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Context Menu */
.context-menu {
    display: none;
    position: absolute;
    background-color: var(--toolbar-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    border-radius: 4px;
    min-width: 180px;
    padding: 4px 0;
}

.context-menu-item {
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-color);
    position: relative;
}

.context-menu-item:hover {
    background-color: var(--accent-color);
    color: white;
}

.context-menu-item .material-icons {
    font-size: 18px;
    margin-right: 8px;
    color: #aaa;
}

.context-menu-item:hover .material-icons {
    color: white;
}

.context-menu-separator {
    height: 1px;
    background-color: var(--border-color);
    margin: 4px 0;
}

/* Submenu */
.has-submenu::after {
    content: '▸';
    position: absolute;
    right: 10px;
}

.submenu {
    display: none;
    position: absolute;
    left: 100%;
    top: 0;
    background-color: var(--toolbar-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    border-radius: 4px;
    min-width: 150px;
    padding: 4px 0;
}

.has-submenu:hover .submenu {
    display: block;
}

main {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
    /* For context menu positioning relative to main if needed, though absolute usually relative to body */
}

.editor-pane,
.preview-container {
    flex: 1;
    height: 100%;
    overflow: auto;
}

.editor-pane {
    border-right: 1px solid var(--border-color);
    background-color: var(--editor-bg);
}

#editor {
    width: 100%;
    height: 100%;
    background-color: transparent;
    color: var(--text-color);
    border: none;
    padding: 20px;
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
    resize: none;
    outline: none;
}

.preview-container {
    background-color: #525659;
    /* Dark desk background */
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    /* Align to top so it grows downwards */
}

.preview-page {
    background-color: var(--preview-bg);
    color: var(--preview-text);
    padding: 40px 50px;
    width: 100%;
    max-width: 850px;
    /* A4-ish width */
    min-height: 100%;
    /* Fill height at least */
    height: fit-content;
    /* Allow it to grow */
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
    margin-bottom: 20px;
}

/* Markdown Content Styling */
.preview-page h1,
.preview-page h2,
.preview-page h3 {
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.3em;
}

.preview-page p {
    margin-bottom: 1em;
    line-height: 1.6;
}

.preview-page code {
    background-color: #f0f0f0;
    padding: 2px 4px;
    border-radius: 3px;
    font-family: monospace;
}

.preview-page pre {
    background-color: #f6f8fa;
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1em;
}

.preview-page pre code {
    background-color: transparent;
    padding: 0;
}

.preview-page blockquote {
    border-left: 4px solid #dfe2e5;
    color: #6a737d;
    padding-left: 1em;
    margin-left: 0;
}

/* Interactive Preview */
.task-list-item-checkbox {
    cursor: pointer;
    margin-right: 0.5em;
}

.task-list-item {
    list-style-type: none;
}

/* Hover effect to indicate interactivity on blocks */
.preview-page p:hover,
.preview-page h1:hover,
.preview-page h2:hover,
.preview-page h3:hover,
.preview-page li:hover {
    background-color: rgba(0, 122, 204, 0.05);
    border-radius: 3px;
    transition: background-color 0.2s;
}

/* Chart Containers */
.chart-container {
    position: relative;
    margin: 20px auto;
    height: 300px;
    width: 100%;
    max-width: 800px;
}

/* Desmos Container */
.desmos-container {
    width: 100%;
    height: 400px;
    margin: 20px 0;
    border: 1px solid #ddd;
}

/* Mermaid */
.mermaid {
    margin: 20px 0;
    text-align: center;
}

details {
    border: 1px solid #aaa;
    border-radius: 4px;
    padding: 0.5em 0.5em 0;
    margin-bottom: 1em;
}

summary {
    font-weight: bold;
    margin: -0.5em -0.5em 0;
    padding: 0.5em;
    cursor: pointer;
}

details[open] {
    padding: 0.5em;
}

details[open] summary {
    border-bottom: 1px solid #aaa;
    margin-bottom: 0.5em;
}

/* Table Grid Selector */
.table-grid-selector {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 2px;
    margin: 20px auto;
    width: 200px;
}

.grid-cell {
    width: 18px;
    height: 18px;
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.05);
    cursor: pointer;
}

.grid-cell.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Math Builder */
.math-builder-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.math-controls {
    text-align: right;
    margin-bottom: 5px;
}

.math-controls label {
    color: var(--text-color);
    cursor: pointer;
    margin-left: 10px;
}

.math-controls label:first-child {
    margin-left: 0;
}

.math-preview-area {
    min-height: 60px;
    padding: 15px;
    background-color: white;
    color: black;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
}

.math-input {
    width: 100%;
    height: 80px;
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    color: white;
    border-radius: 4px;
    font-family: monospace;
    resize: vertical;
}

.math-symbols-tabs {
    display: flex;
    gap: 5px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-color);
    padding: 5px 10px;
    cursor: pointer;
    opacity: 0.7;
}

.tab-btn.active {
    opacity: 1;
    border-bottom: 2px solid var(--accent-color);
}

.math-symbols-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
    padding: 5px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

.symbol-btn {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 15px;
    cursor: pointer;
    border-radius: 4px;
    text-align: center;
    font-size: 1.1em;
    display: flex;
    align-items: center;
    justify-content: center;
}

.symbol-btn:hover {
    background-color: var(--accent-color);
}

.periodic-table-grid {
    display: grid;
    grid-template-columns: repeat(18, minmax(30px, 1fr));
    gap: 2px;
    background-color: #333;
    padding: 5px;
    border-radius: 4px;
    overflow-x: auto;
}

.element-cell {
    width: 32px;
    height: 36px;
    background-color: #444;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    cursor: pointer;
    border: 1px solid #555;
    user-select: none;
}

.element-cell:hover {
    background-color: var(--accent-color);
    border-color: white;
    transform: scale(1.2);
    z-index: 10;
}

.element-symbol {
    font-weight: bold;
    font-size: 12px;
}

.element-number {
    font-size: 8px;
    opacity: 0.7;
}

.element-empty {
    background-color: transparent;
    border: none;
    pointer-events: none;
}

.secondary-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 4px;
}

.secondary-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.modal-footer {
    margin-top: 15px;
    display: flex;
    justify-content: space-between;
}

#periodic-table-container {
    display: none;
    margin-top: 10px;
}

.periodic-table-cell {
    aspect-ratio: 1;
    border: 1px solid #444;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    background-color: #2d2d2d;
    transition: transform 0.1s;
}

.periodic-table-cell:hover {
    transform: scale(1.2);
    z-index: 10;
    border-color: #fff;
}

.periodic-table-cell.empty {
    border: none;
    background: none;
    cursor: default;
}

/* Periodic Table Categories */
.periodic-table-cell.alkali {
    background-color: #ff6666;
    color: black;
}

.periodic-table-cell.alkaline-earth {
    background-color: #ffdead;
    color: black;
}

.periodic-table-cell.transition {
    background-color: #ffc0c0;
    color: black;
}

.periodic-table-cell.post-transition {
    background-color: #cccccc;
    color: black;
}

.periodic-table-cell.metalloid {
    background-color: #cccc99;
    color: black;
}

.periodic-table-cell.nonmetal {
    background-color: #a0ffa0;
    color: black;
}

.periodic-table-cell.halogen {
    background-color: #ffff99;
    color: black;
}

.periodic-table-cell.noble {
    background-color: #c0ffff;
    color: black;
}

.periodic-table-cell.lanthanide {
    background-color: #ffbfff;
    color: black;
}

.periodic-table-cell.actinide {
    background-color: #ff99cc;
    color: black;
}

/* Toolbar Select */
.toolbar-select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: transparent;
    color: var(--text-color);
    border: none;
    padding: 0 24px 0 8px;
    border-radius: 3px;
    cursor: pointer;
    height: 32px;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    outline: none;

    /* Custom Arrow */
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23d4d4d4%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 10px;
}

.toolbar-select:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.toolbar-select option {
    background-color: var(--toolbar-bg);
    color: var(--text-color);
    padding: 8px;
}

/* Resizer */
.resizer {
    width: 5px;
    background-color: var(--border-color);
    cursor: col-resize;
    transition: background-color 0.2s;
    z-index: 10;
}

.resizer:hover,
.resizer.resizing {
    background-color: var(--accent-color);
}

/* Heading Options Styling */
.option-h1 {
    font-size: 1.5rem;
    font-weight: bold;
}

.option-h2 {
    font-size: 1.25rem;
    font-weight: bold;
}

.option-h3 {
    font-size: 1.1rem;
    font-weight: bold;
}

/* Tutorial Modal */
.tutorial-content {
    max-width: 500px;
    text-align: center;
    padding: 30px;
}

.tutorial-step-content {
    min-height: 150px;
    margin-bottom: 20px;
}

.tutorial-step-content h3 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.tutorial-step-content p {
    line-height: 1.6;
    color: var(--text-color);
    margin-bottom: 20px;
}

.tutorial-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.tutorial-nav {
    display: flex;
    gap: 10px;
}

.tutorial-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 15px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--border-color);
    transition: background-color 0.3s;
}

.dot.active {
    background-color: var(--accent-color);
}

.secondary-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

.secondary-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.secondary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Tour Tooltip */
.tour-tooltip {
    display: none;
    position: absolute;
    background-color: var(--toolbar-bg);
    border: 1px solid var(--accent-color);
    border-radius: 6px;
    padding: 15px;
    width: 280px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    z-index: 20000;
    transition: opacity 0.3s, transform 0.3s;
}

.tour-arrow {
    position: absolute;
    width: 12px;
    height: 12px;
    background-color: var(--toolbar-bg);
    border-left: 1px solid var(--accent-color);
    border-top: 1px solid var(--accent-color);
    transform: rotate(45deg);
    z-index: -1;
}

.tour-content h3 {
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.tour-content p {
    font-size: 0.9rem;
    color: var(--text-color);
    line-height: 1.4;
    margin-bottom: 15px;
}

.tour-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tour-progress {
    font-size: 0.8rem;
    color: #888;
}

.tour-buttons {
    display: flex;
    gap: 8px;
}

.secondary-btn.small,
.primary-btn.small {
    padding: 4px 10px;
    font-size: 0.8rem;
}

/* Highlight effect for tour target */
.tour-highlight {
    position: relative;
    z-index: 19999;
    box-shadow: 0 0 0 4px rgba(0, 122, 204, 0.5);
    border-radius: 4px;
    background-color: rgba(255, 255, 255, 0.05);
}

/* Editor Tabs */
.editor-tabs-bar {
    display: flex;
    background-color: var(--editor-bg);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    height: 35px;
    align-items: center;
}

.editor-tab {
    display: flex;
    align-items: center;
    padding: 0 10px;
    height: 100%;
    cursor: pointer;
    border-right: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 13px;
    min-width: 120px;
    justify-content: space-between;
    background-color: rgba(0, 0, 0, 0.2);
    user-select: none;
}

.editor-tab.active {
    background-color: var(--editor-bg);
    border-top: 2px solid var(--accent-color);
}

.editor-tab:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.tab-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100px;
}

.tab-close {
    margin-left: 8px;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    opacity: 0.7;
}

.tab-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
    opacity: 1;
}

@media print {
    body * {
        visibility: hidden;
    }

    .preview-container,
    .preview-page,
    .preview-page * {
        visibility: visible;
    }

    .preview-container {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: auto;
        overflow: visible;
        background-color: white;
        padding: 0;
        margin: 0;
        display: block;
        /* Reset flex */
    }

    .preview-page {
        position: relative;
        /* Changed from absolute */
        width: 100%;
        height: auto;
        overflow: visible;
        background-color: white;
        color: black;
        padding: 0;
        /* Let browser handle margins or set standard */
        box-shadow: none;
        /* Remove shadow for print */
        margin: 0;
        max-width: none;
    }

    /* Hide scrollbars and other UI elements */
    .container>header,
    /* Be specific to avoid hiding preview content if nested */
    .editor-pane,
    .resizer,
    .editor-tabs-bar {
        display: none !important;
    }

    /* Ensure main container doesn't clip */
    .container,
    main {
        overflow: visible !important;
        height: auto !important;
        display: block !important;
    }
}

/* Themes */
body.theme-light {
    --bg-color: #f0f0f0;
    --text-color: #333333;
    --editor-bg: #ffffff;
    --preview-bg: #ffffff;
    --preview-text: #333333;
    --border-color: #cccccc;
    --toolbar-bg: #e0e0e0;
    --scrollbar-track: #f0f0f0;
    --scrollbar-thumb: #c1c1c1;
    --scrollbar-thumb-hover: #a8a8a8;
}

body.theme-monokai {
    --bg-color: #272822;
    --text-color: #f8f8f2;
    --editor-bg: #272822;
    --preview-bg: #ffffff;
    --preview-text: #333333;
    --border-color: #49483e;
    --toolbar-bg: #1e1f1c;
    --scrollbar-track: #272822;
    --scrollbar-thumb: #49483e;
    --scrollbar-thumb-hover: #75715e;
}

body.theme-solarized-dark {
    --bg-color: #002b36;
    --text-color: #839496;
    --editor-bg: #002b36;
    --preview-bg: #fdf6e3;
    --preview-text: #073642;
    --border-color: #073642;
    --toolbar-bg: #073642;
    --scrollbar-track: #002b36;
    --scrollbar-thumb: #073642;
    --scrollbar-thumb-hover: #586e75;
}

body.theme-solarized-light {
    --bg-color: #fdf6e3;
    --text-color: #657b83;
    --editor-bg: #fdf6e3;
    --preview-bg: #ffffff;
    --preview-text: #333333;
    --border-color: #93a1a1;
    --toolbar-bg: #eee8d5;
    --scrollbar-track: #fdf6e3;
    --scrollbar-thumb: #93a1a1;
    --scrollbar-thumb-hover: #657b83;
}

body.theme-high-contrast {
    --bg-color: #ffffff;
    --text-color: #000000;
    --editor-bg: #ffffff;
    --preview-bg: #ffffff;
    --preview-text: #000000;
    --border-color: #000000;
    --toolbar-bg: #ffffff;
    --accent-color: #0000ff;
    --scrollbar-track: #ffffff;
    --scrollbar-thumb: #000000;
    --scrollbar-thumb-hover: #333333;
}

body.theme-github-light {
    --bg-color: #ffffff;
    --text-color: #24292f;
    --editor-bg: #ffffff;
    --preview-bg: #ffffff;
    --preview-text: #24292f;
    --border-color: #d0d7de;
    --toolbar-bg: #f6f8fa;
    --scrollbar-track: #ffffff;
    --scrollbar-thumb: #d0d7de;
    --scrollbar-thumb-hover: #8c959f;
}

body.theme-github-dark {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --editor-bg: #0d1117;
    --preview-bg: #0d1117;
    --preview-text: #c9d1d9;
    --border-color: #30363d;
    --toolbar-bg: #161b22;
    --scrollbar-track: #0d1117;
    --scrollbar-thumb: #30363d;
    --scrollbar-thumb-hover: #6e7681;
}

body.theme-github-dark-dimmed {
    --bg-color: #22272e;
    --text-color: #adbac7;
    --editor-bg: #22272e;
    --preview-bg: #22272e;
    --preview-text: #adbac7;
    --border-color: #444c56;
    --toolbar-bg: #2d333b;
    --scrollbar-track: #22272e;
    --scrollbar-thumb: #444c56;
    --scrollbar-thumb-hover: #768390;
}

body.theme-github-light-hc {
    --bg-color: #ffffff;
    --text-color: #0e1117;
    --editor-bg: #ffffff;
    --preview-bg: #ffffff;
    --preview-text: #0e1117;
    --border-color: #8b949e;
    --toolbar-bg: #ffffff;
    --scrollbar-track: #ffffff;
    --scrollbar-thumb: #8b949e;
    --scrollbar-thumb-hover: #6e7681;
}

body.theme-github-dark-hc {
    --bg-color: #010409;
    --text-color: #f0f6fc;
    --editor-bg: #010409;
    --preview-bg: #010409;
    --preview-text: #f0f6fc;
    --border-color: #6e7681;
    --toolbar-bg: #0d1117;
    --scrollbar-track: #0d1117;
    --scrollbar-thumb: #6e7681;
    --scrollbar-thumb-hover: #8b949e;
}

/* Adjust toolbar buttons for light themes */
body.theme-light button,
body.theme-solarized-light button,
body.theme-high-contrast button,
body.theme-github-light button,
body.theme-github-light-hc button {
    color: var(--text-color);
}

body.theme-light .toolbar-group,
body.theme-solarized-light .toolbar-group,
body.theme-high-contrast .toolbar-group,
body.theme-github-light .toolbar-group,
body.theme-github-light-hc .toolbar-group {
    background: rgba(0, 0, 0, 0.05);
}

/* Adjust toolbar buttons for github light hc */
body.theme-github-light-hc button {
    color: var(--text-color);
}

body.theme-github-light-hc .toolbar-group {
    background: rgba(0, 0, 0, 0.1);
    /* Slightly darker for contrast */
}

/* Responsive Toolbar */
@media (max-width: 1100px) {
    .btn-text {
        display: none;
    }

    .toolbar-group {
        gap: 1px;
        padding: 2px;
    }

    button {
        padding: 4px;
        min-width: 28px;
        height: 28px;
    }
}

@media (max-width: 600px) {
    .toolbar {
        gap: 5px;
    }

    .toolbar-group {
        flex-wrap: wrap;
        justify-content: center;
    }

    h1 {
        font-size: 1rem;
    }
}

/* Desmos Modal Styles */
.desmos-modal-content {
    width: 90%;
    height: 90%;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    padding: 0;
    /* Reset padding for header/footer layout */
    overflow: hidden;
    /* Prevent scroll on main container */
}

.modal-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.02);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.2rem;
}

.desmos-editor-container {
    flex: 1;
    width: 100%;
    border-bottom: 1px solid var(--border-color);
    background-color: #fff;
    /* Desmos needs white bg usually */
}

.desmos-modal-footer {
    padding: 15px 20px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.02);
}

.desmos-options {
    display: flex;
    gap: 20px;
    align-items: center;
}

.desmos-option-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.desmos-option-group label {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.9;
}

.desmos-option-group select {
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    border-radius: 4px;
    outline: none;
}

.desmos-option-group select:focus {
    border-color: var(--accent-color);
}

.checkbox-group {
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    cursor: pointer;
}

.checkbox-group label {
    cursor: pointer;
}

.modal-actions {
    display: flex;
    gap: 10px;
}

/* Ensure close button is positioned correctly in header */
.modal-header .close-modal {
    position: static;
    /* Reset absolute positioning if inherited */
    font-size: 24px;
    line-height: 1;
    padding: 0;
    margin: 0;
}