.notebook {
    position: relative;
    padding-bottom: 40px;
    user-select: none;
}

.cell-output,
.cell-markdown-rendered {
    user-select: text;
}

.notebook::after {
    content: '';
    position: absolute;
    top: 0;
    left: 36px;
    right: 0;
    bottom: 72px;
    border-radius: 3px;
    box-shadow: rgba(14, 30, 37, 0.12) 0px 2px 4px 0px, rgba(14, 30, 37, 0.32) 0px 2px 16px 0px;
    pointer-events: none;
    transition: opacity 0.15s;
}

#notebook-container:hover .notebook::after,
.notebook-undocked::after {
    opacity: 0;
}

.notebook-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.notebook-empty p {
    margin-bottom: 16px;
    font-size: 15px;
}

.add-cell-container {
    display: none;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    padding: 4px 5px;
    margin-left: 36px;
    opacity: 0;
    transition: opacity 0.2s;
}

.add-cell-container .add-cell-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    grid-column: 2;
}

.add-cell-container.add-cell-last {
    display: grid;
    opacity: 0;
}

#notebook-container:hover .add-cell-container.add-cell-last,
.notebook-undocked:hover .add-cell-container.add-cell-last {
    opacity: 1;
}

.add-cell-container:hover,
.add-cell-container:focus-within,
.add-cell-container.drop-target {
    opacity: 1;
}

.add-cell-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    background: var(--bg-secondary);
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-size: 11px;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
}

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

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

.project-browser {
    max-width: 600px;
    margin: 40px auto;
}

.project-browser h2 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.project-list, .notebook-list {
    list-style: none;
}

.project-list li, .notebook-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    margin-bottom: 4px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.15s;
}

.project-list li:hover, .notebook-list li:hover {
    background: var(--bg-tertiary);
}

.project-list li span, .notebook-list li span {
    font-size: 14px;
}

.project-list li .meta, .notebook-list li .meta {
    font-size: 12px;
    color: var(--text-muted);
}

.create-form {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.create-form input {
    flex: 1;
}

/* Welcome screen */
.welcome-screen {
    display: flex;
    justify-content: center;
    padding: 48px 24px 80px;
}

.welcome-content {
    max-width: 560px;
    width: 100%;
}

.welcome-content h1 {
    font-size: 28px;
    font-weight: 300;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.welcome-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.welcome-section {
    margin-bottom: 28px;
}

.welcome-section h3 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.welcome-section ol {
    padding-left: 20px;
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.8;
}

.welcome-section ol li {
    padding-left: 4px;
}

.welcome-shortcuts {
    font-size: 13px;
    border-collapse: collapse;
    width: 100%;
}

.welcome-shortcuts td {
    padding: 5px 0;
    color: var(--text-primary);
}

.welcome-shortcuts td:first-child {
    width: 160px;
}

.welcome-content kbd {
    display: inline-block;
    padding: 1px 6px;
    font-family: var(--font-sans);
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    box-shadow: 0 1px 0 var(--border-color);
}

.welcome-code {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 14px 16px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-primary);
}

.welcome-code code {
    font-family: inherit;
}