/*
 * The Lab popover and Lab marks (issue #14, spec R-8.1, R-8.2, section 10)
 * ========================================================================
 *
 * Consumes the design tokens from tokens.css; the Lab adds only its mark
 * hues, defined once here. Marks are transient overlays drawn with tints
 * and underlines, never with opacity: opacity is the ghost treatment
 * (R-5.1), and a mark must never look like text that would go.
 *
 *   --te-lab-wash-weak        lavender wash        weak sentences
 *   --te-lab-amber            #d9a05b              long sentences (underline), off-tone words (dotted)
 *   --te-lab-rose             #e8778e              typos (wavy), punctuation slips (wash)
 *   --te-lab-teal             #6cc4b0              convoluted sentences (double), hedges (dashed)
 *
 * Each action shows its own marks only, so at most two styles are visible
 * at a time. Sentence marks use background washes with
 * box-decoration-break so wrapped lines each get the tint; word marks use
 * text-decoration. Neither changes line height.
 */

:root {
    --te-lab-amber: #d9a05b;
    --te-lab-rose: #e8778e;
    --te-lab-teal: #6cc4b0;
    --te-lab-wash-weak: rgba(140, 134, 230, 0.2);
    --te-lab-wash-long: rgba(217, 160, 91, 0.12);
    --te-lab-wash-convoluted: rgba(108, 196, 176, 0.12);
    --te-lab-wash-punctuation: rgba(232, 119, 142, 0.3);
    --te-lab-popover-width: min(32rem, calc(100vw - 2rem));
}

/* ---- Marks ---- */

.te-lab-mark {
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
    border-radius: 2px;
    text-underline-offset: 0.22em;
}

.te-lab-mark--weak-sentence {
    background-color: var(--te-lab-wash-weak);
}

.te-lab-mark--long-sentence {
    background-color: var(--te-lab-wash-long);
    text-decoration: underline solid var(--te-lab-amber) 1px;
}

.te-lab-mark--convoluted-sentence {
    background-color: var(--te-lab-wash-convoluted);
    text-decoration: underline double var(--te-lab-teal) 1px;
}

.te-lab-mark--typo {
    text-decoration: underline wavy var(--te-lab-rose) 1px;
    text-decoration-skip-ink: none;
}

.te-lab-mark--punctuation {
    background-color: var(--te-lab-wash-punctuation);
    box-shadow: inset 0 -1px 0 var(--te-lab-rose);
}

.te-lab-mark--off-tone {
    text-decoration: underline dotted var(--te-lab-amber) 2px;
}

.te-lab-mark--hedge {
    text-decoration: underline dashed var(--te-lab-teal) 1px;
}

.te-lab-mark--filler {
    text-decoration: underline dashed var(--te-color-text-dim) 1px;
}

/* ---- Popover (R-8.1) ---- */

.te-lab {
    position: fixed;
    left: 50%;
    bottom: 4rem;
    z-index: 30;
    box-sizing: border-box;
    width: var(--te-lab-popover-width);
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    transform: translateX(-50%);
    padding: 0.875rem 0.5rem 0.625rem;
    border: 1px solid var(--te-color-panel-border);
    border-radius: var(--te-radius-popover);
    background: var(--te-color-popover);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.55);
    color: var(--te-color-text);
    font-family: var(--te-font-mono);
    font-size: 0.8125rem;
    line-height: 1.5;
    text-align: left;
}

.te-lab[hidden],
.te-lab-chip[hidden],
.te-lab-results[hidden],
.te-lab-trim[hidden],
.te-lab-note[hidden],
.te-lab-proposals[hidden] {
    display: none;
}

@media (prefers-reduced-motion: no-preference) {
    .te-lab:not([hidden]) {
        animation: te-lab-rise 140ms ease-out;
    }
}

@keyframes te-lab-rise {
    from { opacity: 0; transform: translate(-50%, 6px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

.te-lab-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 0.625rem 0.5rem;
}

.te-lab-title {
    margin: 0;
    font-family: var(--te-font-display);
    font-size: 1.375rem;
    font-weight: 400;
    line-height: 1.1;
    color: var(--te-color-accent);
}

.te-lab-subtitle {
    color: var(--te-color-text-dim);
    font-size: 0.75rem;
}

.te-lab-actions {
    display: flex;
    flex-direction: column;
}

.te-lab button {
    margin: 0;
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
    cursor: pointer;
}

.te-lab button:focus-visible {
    outline: 2px solid var(--te-color-accent);
    outline-offset: -2px;
    border-radius: 6px;
}

.te-lab .te-lab-action {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 0.625rem;
    width: 100%;
    padding: 0.45rem 0.625rem;
    border-radius: 6px;
    text-align: left;
}

.te-lab .te-lab-action:hover,
.te-lab .te-lab-action:focus-visible {
    background: var(--te-color-popover-hover);
}

.te-lab-action[aria-checked="true"] {
    color: var(--te-color-accent);
}

.te-lab-action-count {
    min-width: 1.5rem;
    color: var(--te-color-text-dim);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

/* What the focused action does: the menu's accessible description only, as
   the video shows no description line (4:56 to 5:30; issue #107). */
.te-lab-hint {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.te-lab-trim {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0.5rem 0.625rem 0;
}

.te-lab-results {
    margin: 0.625rem 0.625rem 0;
    padding-top: 0.625rem;
    border-top: 1px solid var(--te-color-panel-border);
}

.te-lab-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1rem;
    color: var(--te-color-text);
}

.te-lab-legend-entry {
    display: inline-flex;
    align-items: baseline;
    gap: 0.5ch;
}

.te-lab-swatch {
    padding: 0 0.15em;
    color: var(--te-color-text-dim);
}

.te-lab-proposals {
    margin: 0.5rem 0 0;
    padding: 0;
    max-height: 9.5rem;
    overflow-y: auto;
    list-style: none;
}

.te-lab-proposal {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.625rem;
    padding: 0.2rem 0;
}

.te-lab-from {
    overflow: hidden;
    color: var(--te-lab-rose);
    text-decoration: line-through;
    text-decoration-color: rgba(232, 119, 142, 0.6);
    text-overflow: ellipsis;
    white-space: pre;
}

.te-lab-to {
    overflow: hidden;
    color: var(--te-color-text);
    text-overflow: ellipsis;
    white-space: pre;
}

.te-lab-arrow {
    color: var(--te-color-text-dim);
    font-size: 0.75rem;
}

.te-lab .te-lab-accept {
    padding: 0.15rem 0.6rem;
    border: 1px solid var(--te-color-accent-soft);
    border-radius: 999px;
    color: var(--te-color-accent);
    font-size: 0.75rem;
}

.te-lab .te-lab-accept:hover {
    border-color: var(--te-color-accent);
}

.te-lab .te-lab-clear {
    display: inline-flex;
    align-items: center;
    gap: 0.5ch;
    margin-top: 0.5rem;
    padding: 0.25rem 0;
    color: var(--te-color-text-dim);
    font-size: 0.75rem;
}

.te-lab .te-lab-clear:hover {
    color: var(--te-color-text);
}

.te-lab-note {
    margin: 0.5rem 0.625rem 0;
    color: var(--te-lab-rose);
    font-size: 0.75rem;
}

/* ---- Closed-state chip beside the LAB pill ---- */

.te-lab-chip {
    position: fixed;
    z-index: 20;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateY(-50%);
    color: var(--te-color-text-dim);
    font-family: var(--te-font-mono);
    font-size: 0.6875rem;
    line-height: 1;
    white-space: nowrap;
}

.te-lab-chip .te-lab-chip-clear {
    margin: 0;
    padding: 0.2rem 0;
    border: 0;
    background: none;
    color: var(--te-color-accent);
    font: inherit;
    cursor: pointer;
}

.te-lab-chip .te-lab-chip-clear:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.te-lab-chip .te-lab-chip-clear:focus-visible {
    outline: 2px solid var(--te-color-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Screen-reader reasons referenced by the marks' aria-describedby. */
.te-lab-descriptions {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 640px) {
    .te-lab-subtitle { display: none; }
    .te-lab-chip { display: none; }
}