/* Code reference preview: sticky chrome, one continuous source view, and
   diff states. */

/* The preview body stays the scroller. Do not give the reference its own
   scroll: the popup card sizes itself with `min-height`, so a percentage
   height inside it resolves to `auto` and the scroller gets no overflow. */
.vyasa-link-preview-body:has(> .vyasa-code-reference) {
    padding: 0;
    background: var(--vyasa-code-bg);
    /* Names the scroller as the size container, so the chrome below can ask
       for the visible width with `cqi`. */
    container-type: inline-size;
}

/* The reference spans the full scroll width, not the visible width. A sticky
   child can only slide inside its parent box, so a parent that stops at the
   visible edge gives the chrome no room to stay put. */
.vyasa-code-reference {
    width: max-content;
    min-width: 100%;
    background: var(--vyasa-code-bg);
}

/* The header and the controls stick together as one block, so the path and
   the changed-line count stay readable while the file moves. One sticky
   element means no height to measure and keep in sync. `left` plus a width of
   one visible pane keeps the same block parked while long lines scroll under
   it. */
.vyasa-code-reference-chrome {
    position: sticky;
    top: 0;
    left: 0;
    z-index: 2;
    width: 100cqi;
    background: var(--vyasa-bg-subtle);
}

.vyasa-code-reference-header {
    flex: 0 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--vyasa-space-1) var(--vyasa-space-2);
    padding: var(--vyasa-space-2) var(--vyasa-space-3);
    border-bottom: 1px solid var(--vyasa-code-border);
    font-size: 0.78em;
}

.vyasa-code-reference-origin {
    font-family: var(--vyasa-font-mono);
    color: var(--vyasa-text-muted);
    overflow-wrap: anywhere;
}

.vyasa-code-reference-path {
    font-family: var(--vyasa-font-mono);
    font-weight: var(--vyasa-weight-semibold);
    color: var(--vyasa-code-fg);
    overflow-wrap: anywhere;
}

.vyasa-code-reference-selection,
.vyasa-code-reference-omission-note {
    color: var(--vyasa-text-muted);
}

.vyasa-code-reference-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--vyasa-space-1);
}

.vyasa-code-reference-badge {
    padding: 0 var(--vyasa-space-2);
    border: 1px solid var(--vyasa-border);
    border-radius: var(--vyasa-radius-pill);
    color: var(--vyasa-text-muted);
    font-weight: var(--vyasa-weight-medium);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.vyasa-code-reference-badge[data-badge="change"] { border-color: var(--vyasa-accent-7); color: var(--vyasa-accent-11); }
.vyasa-code-reference-badge[data-badge="rename"],
.vyasa-code-reference-badge[data-badge="no_changed_lines"] {
    border-color: color-mix(in srgb, var(--vyasa-warning) 50%, transparent);
    color: var(--vyasa-warning);
}

.vyasa-code-reference-actions {
    display: flex;
    gap: var(--vyasa-space-2);
    margin-inline-start: auto;
}

.vyasa-code-reference-action { color: var(--vyasa-link); font-weight: var(--vyasa-weight-medium); text-decoration: underline; text-underline-offset: 0.2em; }

.vyasa-code-reference-rename { font-family: var(--vyasa-font-mono); }

.vyasa-code-reference-controls {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--vyasa-space-2);
    padding: var(--vyasa-space-2) var(--vyasa-space-3);
    border-bottom: 1px solid var(--vyasa-code-border);
}

.vyasa-code-reference-controls button,
.vyasa-code-reference-omission button {
    padding: 2px var(--vyasa-space-2);
    border: 1px solid var(--vyasa-border);
    border-radius: var(--vyasa-radius-md);
    background: var(--vyasa-surface);
    color: var(--vyasa-text);
    font-size: 0.78em;
    font-weight: var(--vyasa-weight-medium);
    cursor: pointer;
    transition: background-color var(--vyasa-duration-fast) var(--vyasa-ease), border-color var(--vyasa-duration-fast) var(--vyasa-ease);
}

.vyasa-code-reference-controls button:hover,
.vyasa-code-reference-omission button:hover { background: var(--vyasa-hover); border-color: var(--vyasa-border-strong); }
.vyasa-code-reference-controls button[aria-pressed="true"] { border-color: var(--vyasa-accent-7); background: var(--vyasa-accent-3); color: var(--vyasa-accent-11); }

.vyasa-code-reference-body > .code-block { margin: 0; min-width: 100%; width: max-content; }
.vyasa-code-reference-body > .code-block pre {
    margin: 0 !important;
    border: 0;
    border-radius: 0 !important;
    box-shadow: none;
    overflow: visible;
}

/* Tick rail: one mark per changed block, placed by its share of the file.
   It reads as a map of the change, not as a second scrollbar. */
.vyasa-code-reference-position {
    align-self: center;
    color: var(--vyasa-text-muted);
    font-family: var(--vyasa-font-mono);
    font-size: 0.78em;
    font-variant-numeric: tabular-nums;
}

.vyasa-code-reference-omission {
    display: flex;
    align-items: center;
    gap: var(--vyasa-space-2);
    padding: var(--vyasa-space-1) var(--vyasa-space-3);
    border-block: 1px dashed var(--vyasa-code-border);
    background: var(--vyasa-bg-subtle);
    font-family: var(--vyasa-font-mono);
    font-size: 0.78em;
}

.vyasa-code-reference-diagnostic {
    display: flex;
    flex-direction: column;
    gap: var(--vyasa-space-1);
    margin: var(--vyasa-space-4);
    padding: var(--vyasa-space-3) var(--vyasa-space-4);
    border: 1px solid color-mix(in srgb, var(--vyasa-danger) 40%, transparent);
    border-radius: var(--vyasa-radius-md);
    color: var(--vyasa-danger);
}

.vyasa-code-reference-diagnostic-code {
    font-family: var(--vyasa-font-mono);
    font-weight: var(--vyasa-weight-medium);
    font-size: 0.78em;
}

.vyasa-code-reference-panes {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    background: var(--vyasa-code-border);
}

.vyasa-code-reference-pane { background: var(--vyasa-code-bg); overflow-x: auto; }

.vyasa-link-preview-body:has(> .vyasa-markdown-reference) {
    background: var(--vyasa-surface);
}

.vyasa-markdown-reference {
    width: 100%;
    background: var(--vyasa-surface);
    color: var(--vyasa-text);
}

.vyasa-markdown-reference .vyasa-code-reference-body { padding: var(--vyasa-space-3); }

.vyasa-markdown-diff { display: grid; gap: var(--vyasa-space-3); }

.vyasa-markdown-diff-omission {
    padding: var(--vyasa-space-2) var(--vyasa-space-3);
    border-block: 1px dashed var(--vyasa-border);
    color: var(--vyasa-text-muted);
    font-size: 0.78em;
    text-align: center;
}

.vyasa-markdown-diff-pair {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--vyasa-space-3);
}

.vyasa-markdown-diff-block {
    min-width: 0;
    padding: var(--vyasa-space-3) var(--vyasa-space-3) 1px;
    border-inline-start: 3px solid transparent;
    border-radius: var(--vyasa-radius-md);
}

.vyasa-markdown-diff-block[data-markdown-diff-state="added"] {
    border-color: color-mix(in srgb, var(--vyasa-success) 70%, transparent);
    background: color-mix(in srgb, var(--vyasa-success) 6%, transparent);
}

.vyasa-markdown-diff-block[data-markdown-diff-state="deleted"] {
    border-color: color-mix(in srgb, var(--vyasa-danger) 70%, transparent);
    background: color-mix(in srgb, var(--vyasa-danger) 6%, transparent);
}

.vyasa-markdown-diff-label {
    display: block;
    margin-block-end: var(--vyasa-space-1);
    color: var(--vyasa-text-muted);
    font-size: 0.78em;
    font-weight: var(--vyasa-weight-medium);
}

.vyasa-markdown-diff-word {
    padding: 0.04em 0.12em;
    border-radius: var(--vyasa-radius-sm);
    text-decoration: none;
}

ins.vyasa-markdown-diff-word { background: color-mix(in srgb, var(--vyasa-success) 20%, transparent); }
del.vyasa-markdown-diff-word { background: color-mix(in srgb, var(--vyasa-danger) 20%, transparent); }

.vyasa-markdown-table-diff .vyasa-table-scroll { margin: 0; }
.vyasa-markdown-table-diff table { width: 100%; margin: 0; }
.vyasa-markdown-table-state {
    display: inline-flex;
    padding: 0 var(--vyasa-space-2);
    border-radius: var(--vyasa-radius-pill);
    font-size: 0.78em;
    font-weight: var(--vyasa-weight-medium);
}
.vyasa-markdown-table-state.is-added { color: var(--vyasa-success); background: color-mix(in srgb, var(--vyasa-success) 14%, transparent); }
.vyasa-markdown-table-state.is-removed { color: var(--vyasa-danger); background: color-mix(in srgb, var(--vyasa-danger) 14%, transparent); }
.vyasa-markdown-table-state.is-changed { color: var(--vyasa-warning); background: color-mix(in srgb, var(--vyasa-warning) 14%, transparent); }
.vyasa-markdown-table-state.is-context { color: var(--vyasa-text-muted); }
.vyasa-markdown-table-state.is-omitted { color: var(--vyasa-text-muted); background: var(--vyasa-hover); }
.vyasa-markdown-table-cell-old,
.vyasa-markdown-table-cell-new {
    padding: 0.04em 0.16em;
    border-radius: var(--vyasa-radius-sm);
    text-decoration: none;
}
.vyasa-markdown-table-cell-old { background: color-mix(in srgb, var(--vyasa-danger) 18%, transparent); }
.vyasa-markdown-table-cell-new { background: color-mix(in srgb, var(--vyasa-success) 18%, transparent); }

@media (max-width: 900px) {
    .vyasa-code-reference-panes { grid-template-columns: 1fr; }
}

/* Change state. Colour is a second signal: every line also carries a
   text label for assistive technology. */
.code-block .vyasa-code-line[data-code-change="added"] {
    background: color-mix(in srgb, var(--vyasa-success) 16%, transparent);
}

.code-block .vyasa-code-line[data-code-change="deleted"] {
    background: color-mix(in srgb, var(--vyasa-danger) 16%, transparent);
}

.code-block .vyasa-code-line[data-code-change="added"][data-code-focus="true"],
.code-block .vyasa-code-line[data-code-change="deleted"][data-code-focus="true"] {
    box-shadow: inset 3px 0 0 var(--vyasa-code-highlight-accent);
}