.cell {
    position: relative;
    margin: 0px 0px 4px 36px;
    /* margin-left: 36px; */
    border: 1px solid transparent;
    border-radius: 0;
    background: #fdfdfd;
    transition: border-color 0.15s, box-shadow 0.15s, border-radius 0.15s;
    box-shadow: 0 -4px 0 0 #fdfdfd, 0 4px 0 0 #fdfdfd;
}

/* First cell: no shadow above, round top corners */
.notebook > .add-cell-container:first-child + .cell {
    box-shadow: 0 4px 0 0 #fdfdfd;
    border-radius: 3px 3px 0 0;
}

/* Last cell: no shadow below, round bottom corners */
.notebook > .cell:has(+ .add-cell-last) {
    box-shadow: 0 -4px 0 0 #fdfdfd, 0 0px 0 0 #fdfdfd;
    border-radius: 0 0 3px 3px;
}

/* Only one cell: all corners rounded */
.notebook > .add-cell-container:first-child + .cell:has(+ .add-cell-last) {
    box-shadow: none;
    border-radius: 3px;
}

#notebook-container:hover .cell,
.notebook-undocked:hover .cell {
    border-color: var(--border-color);
    border-radius: var(--radius);
    box-shadow: rgba(60, 64, 67, 0.3) 0px 1px 2px 0px, rgba(60, 64, 67, 0.15) 0px 1px 3px 1px;
}

.cell.focused::before,
.cell.selected::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 5px;
    bottom: 5px;
    width: 3px;
    background: #6096e5e6;
    border-radius: 4px;
}

.cell:focus {
    outline: none;
}

.cell.locked-by-other {
    border-color: var(--accent-orange);
    opacity: 0.85;
}

.cell.executing::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 5px;
    bottom: 5px;
    width: 3px;
    background: #e04040;
    border-radius: 4px;
    animation: executing-pulse 6s ease-in-out infinite;
}

@keyframes executing-pulse {
    0%, 100% { box-shadow: 0 0 6px 2px rgba(224, 64, 64, 0.4); }
    50% { box-shadow: 0 0 10px 3px rgba(224, 64, 64, 0.6); }
}

.cell-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    padding: 4px 5px;
    font-size: 12px;
    color: var(--text-muted);
    border-bottom: 0.5px solid transparent;
    background: transparent;
    border-radius: 0;
    transition: background 0.15s, border-radius 0.15s;
}

.cell-header-left {
    display: flex;
    align-items: center;
    gap: 6px;
}

.cell-header-center {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.cell-header-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
}

#notebook-container:hover .cell:not(.markdown-rendered) .cell-header,
.notebook-undocked:hover .cell:not(.markdown-rendered) .cell-header {
    background: linear-gradient(to right,
        var(--bg-tertiary) calc(var(--gutter-width, 0px) - 1px),
        #d0d0d8 calc(var(--gutter-width, 0px) - 1px),
        #d0d0d8 var(--gutter-width, 0px),
        transparent var(--gutter-width, 0px));
}

#notebook-container .cell:hover .cell-header,
.notebook-undocked .cell:hover .cell-header {
    border-radius: var(--radius) var(--radius) 0 0;
    border-bottom: 0.5px solid #999999;
}

#notebook-container .cell:hover[data-cell-type="code"] .cell-header,
.notebook-undocked .cell:hover[data-cell-type="code"] .cell-header {
    background: #c6e2ff69;
    border-bottom: 0.5px solid #999999;
}

#notebook-container .cell:hover[data-cell-type="markdown"] .cell-header,
.notebook-undocked .cell:hover[data-cell-type="markdown"] .cell-header {
    background: #b0eaac45;
    border-bottom: 0.5px solid #999999;
}

.cell-type-badge {
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 11px;
    min-width: 65px;
    opacity: 0;
    transition: opacity 0.15s;
}

.cell:hover .cell-type-badge {
    opacity: 1;
}

.cell-type-badge.code {
    color: #5675e3;
}

.cell-type-badge.markdown {
    color: #298829;
}

.cell-running-badge {
    position: absolute;
    top: 41px;
    right: 15px;
    z-index: 5;
    font-size: 9px;
    font-weight: 700;
    font-family: var(--font-sans);
    color: #c03030;
    letter-spacing: 0.5px;
    background: #f8d8d8;
    border: 1px solid #e0a0a0;
    padding: 1px 7px;
    border-radius: 3px;
    animation: running-fade 3s ease-in-out infinite;
    display: none;
}

.cell.executing .cell-running-badge {
    display: inline-block;
}

@keyframes running-fade {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.cell-lock-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--accent-orange);
}

.cell-header-btn {
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    font-size: 11px;
    background: transparent;
    color: #333333;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.15s, color 0.15s, background 0.15s;
}

.cell:hover .cell-header-btn {
    opacity: 1;
}

.cell-add-code-btn:hover {
    background: #c6e2ff;
    color: #3366cc;
    border-color: #a8ccee;
}

.cell-add-md-btn:hover {
    background: #d2eecd;
    color: #3a7a3a;
    border-color: #a8d9a0;
}

.cell-ask-btn,
.cell-add-run-btn {
    width: 26px;
    height: 20px;
    padding: 0;
}

.cell-export-task-btn {
    width: 27px;
    height: 21px;
    padding: 0;
}

.cell-ask-btn:hover,
.cell-export-task-btn:hover,
.cell-add-run-btn:hover {
    background: #c8e6c0;
}

/* Ask Assistant dropdown */
.cell-ask-wrapper {
    position: relative;
    display: inline-flex;
}

.cell-ask-menu {
    display: none;
    position: absolute;
    top: 100%;
    padding-top: 2px;
    left: 0;
    z-index: 100;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 112px;
    padding: 4px 0;
}

.cell-ask-wrapper:hover .cell-ask-menu {
    display: block;
}

.cell-ask-menu-item {
    padding: 5px 12px;
    font-size: 12px;
    color: #333;
    cursor: pointer;
    white-space: nowrap;
}

.cell-ask-menu-item:hover {
    background: #c8e6c0;
}

.cell-clear-btn {
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 20px;
    padding: 0;
    background: transparent;
    color: var(--text-muted);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.15s, color 0.15s;
}

.cell:hover .cell-clear-btn {
    opacity: 1;
}

.cell-clear-btn:hover {
    background: #c8e6c0;
    color: var(--accent-yellow);
}

.cell[data-cell-type="markdown"] .cell-clear-btn {
    display: none;
}

.cell-run-above-btn,
.cell-run-below-btn {
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 20px;
    padding: 0;
    background: transparent;
    color: var(--text-muted);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.15s, color 0.15s;
}

.cell:hover .cell-run-above-btn,
.cell:hover .cell-run-below-btn {
    opacity: 1;
}

.cell-run-above-btn:hover,
.cell-run-below-btn:hover {
    background: #c8e6c0;
    color: var(--accent-green);
}


.cell-copy-btn {
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 20px;
    padding: 0;
    background: transparent;
    color: var(--text-muted);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.15s, color 0.15s;
}

.cell:hover .cell-copy-btn {
    opacity: 1;
}

.cell-copy-btn:hover {
    background: #c8e6c0;
    color: var(--accent-blue);
}

.cell-copy-toast {
    position: absolute;
    top: -29px;
    left: 50%;
    transform: translateX(-50%);
    padding: 2px 8px;
    font-size: 11px;
    font-weight: normal;
    color: #1d1d1d;
    background: #a8d8a0;
    border-radius: 4px;
    white-space: nowrap;
    pointer-events: none;
    animation: copyToastFade 1.2s ease forwards;
}

@keyframes copyToastFade {
    0% { opacity: 0; transform: translateX(-50%) translateY(4px); }
    15% { opacity: 1; transform: translateX(-50%) translateY(0); }
    70% { opacity: 1; }
    100% { opacity: 0; }
}

.cell-delete-btn {
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 20px;
    padding: 0;
    background: transparent;
    color: var(--text-muted);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.15s, color 0.15s;
    margin-right: 2px;
}

.cell:hover .cell-delete-btn {
    opacity: 1;
}

.cell-delete-btn:hover {
    background: #c8e6c0;
    color: var(--accent-red);
}

.cell-sidebar {
    position: absolute;
    left: -33px;
    top: 0;
    bottom: 0;
    width: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding-top: 3px;
    opacity: 0;
    transition: opacity 0.15s;
}

.cell:hover .cell-sidebar {
    opacity: 1;
}

.cell-sidebar .cell-run-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    padding: 0 0 1.5px 3px;
    font-size: 13px;
    background: #ffffff;
    color: var(--accent-green);
    border: 0.5px solid var(--accent-green);
    border-radius: 50%;
    cursor: pointer;
    flex-shrink: 0;
    margin-bottom: 4px;
    margin-right: 5px;
    box-shadow: rgba(60, 64, 67, 0.3) 0px 1px 2px 0px, rgba(60, 64, 67, 0.15) 0px 1px 3px 1px;
}

.cell-sidebar .cell-run-btn:hover {
    background: #36823dcf;
    color: #3ddc3d;
    transform: scale(1.1);
    transform-origin: center;
}

.cell-sidebar .cell-run-btn.stopping {
    color: #e04040;
    font-size: 12px;
    padding-right: 4px;
}

.cell-sidebar .cell-run-btn.stopping:hover {
    background: #f0b870;
    color: #e06060;
}

.cell-drag-handle {
    flex: 1;
    width: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    color: var(--text-muted);
    font-size: 17px;
    border-radius: 2px;
    user-select: none;
    margin-right: 4px;
    margin-bottom: 20px;
    margin-top: 2px;
}

.cell-drag-handle:hover {
    background: #6096e5;
    color: #ffffff;
    border: 1px solid #005ed126;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
    padding-left: 4px;
}

.cell-sidebar-exec-count {
    position: absolute;
    left: -20px;
    transform: translateX(-50%);
    bottom: 0;
    font-size: 10px;
    color: #1d1d1d;
    font-family: var(--font-mono);
    white-space: nowrap;
    margin: 1px;
    padding-bottom: 1px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 2px;
}

.cell-drag-handle:active {
    cursor: grabbing;
}

.cell.dragging {
    opacity: 0.4;
}

.add-cell-container.drop-target {
    display: block;
    position: relative;
    padding: 2px 0;
}

.add-cell-container.drop-target .add-cell-button {
    display: none;
}

.add-cell-container.drop-target::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 2px;
    background: var(--accent-green);
    border-radius: 1px;
    transform: translateY(-50%);
    box-shadow: 0 0 4px rgba(46, 168, 46, 0.4);
}

.cell[data-cell-type="code"]::after {
    content: attr(data-kernel-language);
    position: absolute;
    top: 6px;
    right: 27px;
    font-size: 10px;
    color: #999999;
    z-index: 1;
    pointer-events: none;
    transition: opacity 0.15s;
}

.cell[data-cell-type="code"]:hover::after {
    opacity: 0;
}

.cell-editor {
    position: relative;
    padding-right: 20px;
    overflow: hidden;
}

.cell-editor .cm-editor {
    background: transparent;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.5;
}

.cell-editor .cm-editor .cm-content {
    padding: 5px 0px 8px 3px;
    caret-color: var(--text-primary);
    background-color: #fff9ef14;
}

.cell-editor .cm-editor .cm-gutters {
    background: #f7f7f7;
    border-right: 1px solid transparent;
    color: var(--text-muted);
    padding: 0 5px 0 2px;
    border-radius: 0px 0px 0px 6px;
    margin-right: 5px;
}

/* Breakpoint gutter */
.cm-breakpoint-gutter {
    width: 14px;
    min-width: 14px;
    cursor: pointer;
}

.cm-breakpoint-gutter .cm-gutterElement {
    padding: 0 1px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cm-breakpoint-marker svg,
.cm-debug-current-marker svg {
    display: block;
    margin-top: 2px;
    margin-right: -2px;
}

/* Current execution line highlight - must override cm-activeLine */
.cm-editor .cm-line.cm-debug-current-line,
.cm-editor.cm-focused .cm-line.cm-debug-current-line {
    background-color: rgba(249, 168, 37, 0.25) !important;
}

/* Debug toolbar bar */
.notebook-debug-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 5px 12px;
    margin: 0 0 0 36px;
    background: #fff3e0;
    border-bottom: 1px solid #ffcc80;
    font-size: 12px;
    position: sticky;
    top: 53px;
    z-index: 3;
    border-left: 0.5px solid #333333;
    border-right: 0.5px solid #333333;
}

.notebook-undocked .notebook-debug-bar {
    margin-left: 0;
}

/* File editor debug bar - no cell sidebar margin, different sticky offset */
#service-tab-container .notebook-debug-bar {
    margin-left: 0;
    top: 0;
}

.debug-bar-label {
    font-weight: 600;
    color: #e53935;
    font-size: 11px;
    white-space: nowrap;
}

.debug-bar-controls {
    display: flex;
    gap: 2px;
}

.debug-bar-btn {
    background: none;
    border: 1px solid transparent;
    border-radius: 3px;
    padding: 0px 6px;
    cursor: pointer;
    font-size: 10px;
    line-height: 1;
}

.debug-bar-btn:hover {
    background: rgba(0, 0, 0, 0.06);
    border-color: #ddd;
}

.debug-bar-status {
    color: #1d1d1d;
    font-size: 11px;
    position: absolute;
    right: 12px;
}

/* Run button wrapper with chevron */
.cell-run-wrap {
    position: relative;
    margin-bottom: 4px;
    margin-right: 5px;
}

.cell-run-wrap .cell-run-btn {
    margin-bottom: 0;
    margin-right: 0;
}

/* Debug mode: bug icon centered with symmetric padding */
.cell-run-wrap .cell-run-btn.debug-mode {
    color: #e8e8e8;
    background: #b53535;
    padding: 0;
}

.cell-sidebar .cell-run-btn.debug-mode:hover {
    background: #c04040;
    color: #fff;
    padding: 0;
}

/* Chevron overlay at bottom-right of run button */
.cell-run-chevron {
    position: absolute;
    bottom: -1px;
    right: -3px;
    font-size: 6px;
    color: #999;
    cursor: pointer;
    line-height: 1;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 8px;
    padding: 1px 1px 0px 1px;
}

.cell-run-chevron:hover {
    color: #333;
}

/* Run mode dropdown */
.cell-run-dropdown {
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 100;
    min-width: 120px;
    padding: 2px 0;
    font-size: 11px;
}

.cell-run-dropdown-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    cursor: pointer;
    white-space: nowrap;
}

.cell-run-dropdown-item:hover {
    background: #f0f0f0;
}

.cell-run-dropdown-item.active {
    font-weight: 600;
}

.cell-run-dropdown-icon {
    width: 14px;
    text-align: center;
    font-size: 10px;
}

#notebook-container:hover .cell-editor .cm-editor .cm-gutters,
.notebook-undocked:hover .cell-editor .cm-editor .cm-gutters {
    background: var(--bg-tertiary);
    border-right: 1px solid var(--border-color);
}

#notebook-container:hover .cell:has(.cell-output:not(:empty)) .cell-editor .cm-editor .cm-gutters,
.notebook-undocked:hover .cell:has(.cell-output:not(:empty)) .cell-editor .cm-editor .cm-gutters {
    border-radius: 0;
    border-bottom: 1px dashed #999999;
}

.cell-editor .cm-editor .cm-lineNumbers .cm-gutterElement {
    text-align: right;
    padding: 0 4px 0 4px;
    font-size: 11px;
    line-height: 19.5px;
    color: transparent;
    transition: color 0.15s;
}

#notebook-container:hover .cell-editor .cm-editor .cm-lineNumbers .cm-gutterElement,
.notebook-undocked:hover .cell-editor .cm-editor .cm-lineNumbers .cm-gutterElement {
    color: var(--text-muted);
}

.cell-editor .cm-editor .cm-activeLineGutter {
    background: transparent;
    transition: background 0.15s;
}

#notebook-container:hover .cell-editor .cm-editor.cm-focused .cm-activeLineGutter,
.notebook-undocked:hover .cell-editor .cm-editor.cm-focused .cm-activeLineGutter {
    background: var(--bg-hover);
}

.cell-editor .cm-editor .cm-activeLine {
    background: transparent;
}

.cell-editor .cm-editor.cm-focused .cm-activeLine {
    background: rgba(108, 140, 255, 0.05);
}

.cell-editor .cm-editor.cm-focused {
    outline: none;
}

.cell-editor .cm-editor .cm-selectionBackground {
    background: rgba(108, 140, 255, 0.2) !important;
}

.cell-markdown-rendered {
    padding: 0px 16px 10px 16px;
    line-height: 1.6;
    color: var(--text-primary);
    margin-left: 35px;
    user-select: text;
}

.cell-markdown-rendered h1 {
    margin: 4px 0px 8px 0px;
    color: var(--text-primary);
}

.cell-markdown-rendered h2,
.cell-markdown-rendered h3 {
    margin: 12px 0 8px;
    color: var(--text-primary);
}

.cell-markdown-rendered p {
    margin: 12px 0;
}

.cell-markdown-rendered ul,
.cell-markdown-rendered ol {
    margin: 6px 0;
    padding-left: 2em;
}

.cell-markdown-rendered li {
    margin: 2px 0;
}

.cell-markdown-rendered code {
    font-family: var(--font-mono);
    background: var(--bg-tertiary);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 12px;
}

.cell-markdown-rendered pre {
    background: #f2f2f2;
    padding: 10px 12px;
    border-radius: var(--radius);
    overflow-x: auto;
}

.cell-markdown-rendered pre code {
    background: transparent;
    padding: 0;
}

.cell-markdown-rendered table {
    border-collapse: collapse;
    margin: 8px 0;
    width: auto;
    font-size: 13px;
}

.cell-markdown-rendered th,
.cell-markdown-rendered td {
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    text-align: left;
}

.cell-markdown-rendered th {
    background: #1f7ccec2;
    font-weight: 500;
    color: #ffffff;
}

.cell-markdown-rendered tr:nth-child(even) {
    background: rgba(0, 0, 0, 0.03);
}

.cell-markdown-rendered img,
.cell-output img {
    max-width: 100%;
    height: auto;
}

.cell-markdown-rendered a,
.cell-output a {
    color: #2563a8;
    text-decoration: none;
    border-bottom: 1px solid #2563a840;
    transition: color 0.15s, border-color 0.15s;
}

.cell-markdown-rendered a:hover,
.cell-output a:hover {
    color: #1a4a80;
    border-bottom-color: #1a4a80;
}

.cell-markdown-rendered a:visited,
.cell-output a:visited {
    color: #6b4fa0;
    border-bottom-color: #6b4fa040;
}

/* Image copy button overlay */
.img-copy-wrapper {
    position: relative;
    display: inline-block;
}

.img-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 26px;
    height: 20px;
    padding: 2px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.15s;
    z-index: 1;
}

.img-copy-wrapper:hover .img-copy-btn {
    opacity: 1;
}

.img-copy-btn:hover {
    background: #c8e6c0;
}

.img-copy-btn.copied {
    background: #c8e6c0;
}