.code-diff-section {
    --tool-accent: #6366F1;
    --tool-accent-rgb: 99, 102, 241;
}

.cd-textarea {
    font-family: var(--tool-font-mono);
    font-size: 1rem;
    min-height: 260px;
}

/* Inputs wrap */
.cd-inputs-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

@media (max-width: 680px) {
    .cd-inputs-wrap {
        grid-template-columns: 1fr;
    }
}

/* Compare row */
.cd-compare-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

/* Summary */
.cd-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1rem;
    background: var(--tool-surface);
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius-sm);
    margin-bottom: 0.875rem;
    font-size: 1rem;
    font-weight: 600;
}

.cd-summary-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.cd-added {
    color: #16a34a;
}

.cd-removed {
    color: #dc2626;
}

.cd-unchanged {
    color: var(--tool-text-muted);
}

.cd-copy-diff-btn {
    margin-left: auto;
}

/* Diff output */
.cd-output-wrap {
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius-md);
    overflow: hidden;
}

.cd-output {
    font-family: var(--tool-font-mono);
    font-size: 1rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 480px;
    overflow-y: auto;
}

/* Inline/unified view rows */
.cd-line {
    display: block;
    padding: 1px 0.75rem;
}

.cd-line--added {
    background: #dcfce7;
    color: #15803d;
}

.cd-line--removed {
    background: #fee2e2;
    color: #b91c1c;
}

.cd-line--equal {
    background: transparent;
    color: var(--tool-text-primary);
}

.cd-line--header {
    background: rgba(var(--tool-accent-rgb), 0.08);
    color: var(--tool-accent);
    font-weight: 600;
    padding: 0.3rem 0.75rem;
}

/* Split view table */
.cd-split-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--tool-font-mono);
    font-size: 1rem;
}

.cd-split-table td {
    padding: 1px 0.75rem;
    vertical-align: top;
    white-space: pre-wrap;
    word-break: break-all;
    width: 50%;
    border-right: 1px solid var(--tool-border);
}

.cd-split-table td:last-child {
    border-right: none;
}

.cd-split-table td.cd-line--added {
    background: #dcfce7;
    color: #15803d;
}

.cd-split-table td.cd-line--removed {
    background: #fee2e2;
    color: #b91c1c;
}

.cd-split-table td.cd-line--equal {
    background: transparent;
    color: var(--tool-text-primary);
}

.cd-split-table td.cd-line--empty {
    background: var(--tool-surface);
}

/* Line number gutter */
.cd-gutter {
    color: var(--tool-text-muted);
    user-select: none;
    padding: 1px 0.5rem;
    border-right: 1px solid var(--tool-border);
    min-width: 2.5rem;
    text-align: right;
    font-size: 1rem;
    vertical-align: top;
    background: var(--tool-surface);
}