/* 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: color-mix(in srgb, var(--vyasa-code-bg) 92%, var(--vyasa-link));
}

.vyasa-code-reference-header {
    flex: 0 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.35rem 0.6rem;
    padding: 0.5rem 0.85rem;
    border-bottom: 1px solid color-mix(in srgb, var(--vyasa-code-fg) 16%, transparent);
    background: color-mix(in srgb, var(--vyasa-code-bg) 90%, var(--vyasa-link));
    font-size: 0.78em;
}

.vyasa-code-reference-origin {
    font-family: var(--vyasa-font-mono, monospace);
    font-size: 0.85em;
    color: var(--vyasa-code-fg);
    opacity: 0.65;
    overflow-wrap: anywhere;
}

.vyasa-code-reference-path {
    font-family: var(--vyasa-font-mono, monospace);
    font-weight: 600;
    color: var(--vyasa-code-fg);
    overflow-wrap: anywhere;
}

.vyasa-code-reference-selection,
.vyasa-code-reference-omission-note {
    color: color-mix(in srgb, var(--vyasa-code-fg) 62%, transparent);
}

.vyasa-code-reference-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.vyasa-code-reference-badge {
    padding: 0.05rem 0.4rem;
    border: 1px solid color-mix(in srgb, var(--vyasa-code-fg) 26%, transparent);
    border-radius: 999px;
    color: color-mix(in srgb, var(--vyasa-code-fg) 78%, transparent);
    font-size: 0.92em;
    white-space: nowrap;
}

.vyasa-code-reference-badge[data-badge="change"] { border-color: color-mix(in srgb, var(--vyasa-link) 55%, transparent); }
.vyasa-code-reference-badge[data-badge="rename"],
.vyasa-code-reference-badge[data-badge="no_changed_lines"] {
    border-color: color-mix(in srgb, #b45309 60%, transparent);
    color: #b45309;
}

.vyasa-code-reference-actions {
    display: flex;
    gap: 0.5rem;
    margin-inline-start: auto;
}

.vyasa-code-reference-action { color: var(--vyasa-link); text-decoration: underline; }
.vyasa-code-reference-action:focus-visible,
.vyasa-code-reference-controls button:focus-visible,
.vyasa-code-reference-omission button:focus-visible {
    outline: 2px solid var(--vyasa-primary);
    outline-offset: 2px;
}

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

.vyasa-code-reference-controls {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0.4rem 0.85rem;
    border-bottom: 1px solid color-mix(in srgb, var(--vyasa-code-fg) 12%, transparent);
}

.vyasa-code-reference-controls button,
.vyasa-code-reference-omission button {
    padding: 0.15rem 0.5rem;
    border: 1px solid color-mix(in srgb, var(--vyasa-link) 42%, transparent);
    border-radius: 0.3rem;
    background: transparent;
    color: var(--vyasa-link);
    font-size: 0.78em;
    cursor: pointer;
}

.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: color-mix(in srgb, var(--vyasa-code-fg) 62%, transparent);
    font-family: var(--vyasa-font-mono, monospace);
    font-size: 0.78em;
    font-variant-numeric: tabular-nums;
}

.vyasa-code-reference-omission {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.85rem;
    border-block: 1px dashed color-mix(in srgb, var(--vyasa-code-fg) 24%, transparent);
    background: color-mix(in srgb, var(--vyasa-code-bg) 92%, var(--vyasa-link));
    font-family: var(--vyasa-font-mono, monospace);
    font-size: 0.78em;
}

.vyasa-code-reference-diagnostic {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    margin: 1rem;
    padding: 0.75rem 1rem;
    border: 1px solid color-mix(in srgb, #b91c1c 45%, transparent);
    border-radius: 0.4rem;
    color: #b91c1c;
}

.vyasa-code-reference-diagnostic-code {
    font-family: var(--vyasa-font-mono, monospace);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.72em;
}

.vyasa-code-reference-panes {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    background: color-mix(in srgb, var(--vyasa-code-fg) 20%, transparent);
}

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

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

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

.vyasa-markdown-reference .vyasa-code-reference-body { padding: 0.75rem; }

.vyasa-markdown-diff { display: grid; gap: 0.65rem; }

.vyasa-markdown-diff-omission {
    padding: 0.4rem 0.8rem;
    border-block: 1px dashed color-mix(in srgb, var(--vyasa-ink) 24%, transparent);
    color: color-mix(in srgb, var(--vyasa-ink) 62%, transparent);
    font-size: 0.78em;
    text-align: center;
}

.vyasa-markdown-diff-pair {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.65rem;
}

.vyasa-markdown-diff-block {
    min-width: 0;
    padding: 0.65rem 0.8rem 0.05rem;
    border-inline-start: 0.22rem solid transparent;
    border-radius: 0.35rem;
}

.vyasa-markdown-diff-block[data-markdown-diff-state="added"] {
    border-color: color-mix(in srgb, #16a34a 70%, transparent);
    background: color-mix(in srgb, #16a34a 6%, transparent);
}

.vyasa-markdown-diff-block[data-markdown-diff-state="deleted"] {
    border-color: color-mix(in srgb, #dc2626 70%, transparent);
    background: color-mix(in srgb, #dc2626 6%, transparent);
}

.vyasa-markdown-diff-label {
    display: block;
    margin-block-end: 0.35rem;
    color: color-mix(in srgb, var(--vyasa-ink) 64%, transparent);
    font-size: 0.72em;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.vyasa-markdown-diff-word {
    padding: 0.04em 0.12em;
    border-radius: 0.15em;
    text-decoration: none;
}

ins.vyasa-markdown-diff-word { background: color-mix(in srgb, #16a34a 20%, transparent); }
del.vyasa-markdown-diff-word { background: color-mix(in srgb, #dc2626 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: 0.08rem 0.42rem;
    border-radius: 999px;
    font-size: 0.72em;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.vyasa-markdown-table-state.is-added { color: #15803d; background: color-mix(in srgb, #16a34a 14%, transparent); }
.vyasa-markdown-table-state.is-removed { color: #b91c1c; background: color-mix(in srgb, #dc2626 14%, transparent); }
.vyasa-markdown-table-state.is-changed { color: #a16207; background: color-mix(in srgb, #ca8a04 16%, transparent); }
.vyasa-markdown-table-state.is-context { color: var(--vyasa-ink-soft); }
.vyasa-markdown-table-state.is-omitted { color: var(--vyasa-ink-soft); background: color-mix(in srgb, var(--vyasa-ink) 6%, transparent); }
.vyasa-markdown-table-cell-old,
.vyasa-markdown-table-cell-new {
    padding: 0.04em 0.16em;
    border-radius: 0.15em;
    text-decoration: none;
}
.vyasa-markdown-table-cell-old { background: color-mix(in srgb, #dc2626 18%, transparent); }
.vyasa-markdown-table-cell-new { background: color-mix(in srgb, #16a34a 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, #16a34a 16%, transparent);
}

.code-block .vyasa-code-line[data-code-change="deleted"] {
    background: color-mix(in srgb, #dc2626 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 0.18em 0 0 var(--vyasa-code-highlight-accent, var(--vyasa-primary));
}