/*
 * HumanProse Learn: the "Explain the changes" strip and panel (workspace and
 * document page), the "My voice" switch in the writing controls and the
 * dashboard's notebook card. The notebook and voice pages add
 * hp-learn-pages.css. Colours come from the --hx-* tokens only, so the
 * light paper and the dark library theme both follow; layout uses logical
 * properties for the Arabic (right-to-left) interface.
 */

/* ---------- Shared pieces ---------- */

body.hp-ui .hp-learn-kicker {
    margin: 0;
    color: var(--hx-quill-ink);
    font: 700 .7rem/1.3 var(--hx-f-body);
    letter-spacing: .16em;
    text-transform: uppercase;
}
html[lang="ar"] body.hp-ui .hp-learn-kicker { font-size: .8rem; letter-spacing: 0; }

body.hp-ui .hp-learn-seal {
    display: inline-grid;
    place-items: center;
    flex: none;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--hx-quill-soft);
    color: var(--hx-quill-ink);
    box-shadow: inset 0 0 0 3px var(--hx-surface), inset 0 0 0 4px color-mix(in srgb, var(--hx-quill) 55%, transparent), 0 6px 16px -10px color-mix(in srgb, var(--hx-quill) 70%, transparent);
}
body.hp-ui .hp-learn-seal svg { width: 19px; height: 19px; fill: none; stroke: currentColor; }
body.hp-ui .hp-learn-seal.is-small { width: 32px; height: 32px; box-shadow: inset 0 0 0 2px var(--hx-surface), inset 0 0 0 3px color-mix(in srgb, var(--hx-quill) 50%, transparent); }
body.hp-ui .hp-learn-seal.is-small svg { width: 15px; height: 15px; }

body.hp-ui .hp-learn-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: none;
    min-height: 42px;
    padding: 0 18px;
    border: 1px solid transparent;
    border-radius: 999px;
    background: var(--hx-royal);
    color: var(--hx-on-stage);
    font: 700 .86rem/1 var(--hx-f-body);
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 10px 22px -14px color-mix(in srgb, var(--hx-royal) 80%, transparent);
    transition: background-color .2s ease, transform .2s var(--hx-ease), box-shadow .2s ease;
}
body.hp-ui .hp-learn-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; }
body.hp-ui .hp-learn-btn:hover { background: var(--hx-royal-hover); transform: translateY(-1px); }
body.hp-ui .hp-learn-btn[aria-expanded="true"] { background: var(--hx-royal-soft); color: var(--hx-royal-ink); border-color: color-mix(in srgb, var(--hx-royal) 30%, transparent); box-shadow: none; }
body.hp-ui .hp-learn-btn[aria-busy="true"] { cursor: progress; opacity: .85; }
body.hp-ui .hp-learn-btn.is-quiet { background: transparent; color: var(--hx-royal-ink); border-color: var(--hx-line-2); box-shadow: none; }
body.hp-ui .hp-learn-btn.is-quiet:hover { background: var(--hx-royal-soft); }

body.hp-ui .hp-learn-icon-btn {
    display: inline-grid;
    place-items: center;
    flex: none;
    width: 36px;
    height: 36px;
    border: 1px solid var(--hx-line);
    border-radius: 50%;
    background: var(--hx-surface);
    color: var(--hx-ink-2);
    cursor: pointer;
    transition: border-color .2s ease, color .2s ease;
}
body.hp-ui .hp-learn-icon-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; }
body.hp-ui .hp-learn-icon-btn:hover { border-color: var(--hx-quill); color: var(--hx-ink); }

body.hp-ui .hp-learn-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--hx-royal-ink);
    font: 700 .84rem/1.3 var(--hx-f-body);
    text-decoration: none;
}
body.hp-ui .hp-learn-link svg { width: 15px; height: 15px; flex: none; fill: none; stroke: currentColor; }
body.hp-ui .hp-learn-link:hover span:first-child { text-decoration: underline; text-underline-offset: 3px; }
[dir="rtl"] body.hp-ui .hp-learn-link svg.is-arrow,
[dir="rtl"] body.hp-ui .hp-learn-arrow svg,
[dir="rtl"] body.hp-ui .hp-voice-cta-arrow { transform: scaleX(-1); }

body.hp-ui .hp-learn-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--hx-quill-soft);
    color: var(--hx-quill-ink);
    font: 700 .68rem/1.4 var(--hx-f-body);
    letter-spacing: .04em;
}

body.hp-ui :is(.hp-learn-btn, .hp-learn-icon-btn, .hp-learn-link, .hp-learn-card, .hp-learn-save, .hp-learn-find, .hp-voice-switch, .hp-voice-edit, .hp-voice-plans, .hp-voice-cta):focus-visible {
    outline: 2px solid var(--hx-focus);
    outline-offset: 2px;
}

body.hp-ui .hp-learn-sr {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

/* ---------- The strip under a result ---------- */

body.hp-ui .hp-learn-strip {
    position: relative;
    padding: 18px 20px;
    border-top: 1px solid var(--hx-line);
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--hx-quill-soft) 70%, transparent), transparent 85%),
        var(--hx-surface);
    color: var(--hx-ink);
}
body.hp-ui .hp-learn-strip[hidden] { display: none; }
@media (min-width: 640px) {
    body.hp-ui .hp-learn-strip { padding: 20px 28px; }
}
body.hp-ui .hp-learn-strip.is-document {
    margin: 22px 0;
    border: 1px solid var(--hx-line);
    border-radius: 24px;
    box-shadow: var(--hx-shadow);
}

body.hp-ui .hp-learn-strip-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px 16px;
}
body.hp-ui .hp-learn-strip-copy { flex: 1 1 260px; min-width: 0; }
body.hp-ui .hp-learn-strip-text { margin: 3px 0 0; color: var(--hx-ink-2); font: 400 .92rem/1.5 var(--hx-f-body); }
@media (max-width: 639px) {
    body.hp-ui .hp-learn-strip-row > .hp-learn-btn { flex: 1 1 100%; }
}

/* ---------- The panel ---------- */

body.hp-ui .hp-learn-panel {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px dashed var(--hx-line-2);
}
body.hp-ui .hp-learn-panel[hidden] { display: none; }
body.hp-ui .hp-learn-panel-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
body.hp-ui .hp-learn-title {
    margin: 4px 0 0;
    color: var(--hx-ink);
    font: 400 1.75rem/1.1 var(--hx-f-display);
    letter-spacing: -.01em;
    outline: none;
}
body.hp-ui .hp-learn-title em { color: var(--hx-quill-ink); font-style: italic; }
body.hp-ui .hp-learn-lede { margin: 6px 0 0; color: var(--hx-ink-3); font: 400 .84rem/1.5 var(--hx-f-body); }
body.hp-ui .hp-learn-lede[hidden] { display: none; }

body.hp-ui .hp-learn-state:empty { display: none; }
body.hp-ui .hp-learn-state {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 14px;
    margin-top: 14px;
    padding: 14px 16px;
    border: 1px solid var(--hx-line);
    border-radius: 16px;
    background: var(--hx-surface-2);
    color: var(--hx-ink-2);
    font: 400 .9rem/1.5 var(--hx-f-body);
}
body.hp-ui .hp-learn-state.is-error { border-color: color-mix(in srgb, var(--hx-danger) 30%, transparent); background: var(--hx-danger-soft); color: var(--hx-ink); }
body.hp-ui .hp-learn-state.is-limit { border-color: color-mix(in srgb, var(--hx-warn) 35%, transparent); background: var(--hx-warn-soft); color: var(--hx-ink); }
body.hp-ui .hp-learn-state p { margin: 0; flex: 1 1 240px; }
body.hp-ui .hp-learn-state .hp-learn-btn { min-height: 36px; padding: 0 14px; font-size: .8rem; }

body.hp-ui .hp-learn-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 290px), 1fr));
    gap: 14px;
    margin: 16px 0 0;
    padding: 0;
    list-style: none;
}
body.hp-ui .hp-learn-cards:empty { display: none; }

body.hp-ui .hp-learn-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    margin: 0;
    padding: 16px 16px 14px;
    border: 1px solid var(--hx-line);
    border-radius: 18px;
    background: var(--hx-surface);
    box-shadow: 0 1px 0 color-mix(in srgb, var(--hx-ink) 4%, transparent);
    transition: border-color .2s ease, box-shadow .2s ease, transform .2s var(--hx-ease);
}
body.hp-ui .hp-learn-card::before {
    content: "";
    position: absolute;
    inset-block: 16px;
    inset-inline-start: -1px;
    width: 3px;
    border-radius: 3px;
    background: var(--cat, var(--hx-royal));
    opacity: .75;
}
body.hp-ui .hp-learn-card:is(:hover, .is-active) {
    border-color: color-mix(in srgb, var(--hx-quill) 60%, var(--hx-line));
    box-shadow: var(--hx-shadow);
    transform: translateY(-2px);
}
/* One colour per kind of change, on the explain cards, notebook entries, filters and flashcards. */
body.hp-ui [data-category] { --cat: var(--hx-royal); }
body.hp-ui [data-category="literal_translation"] { --cat: var(--hx-quill); }
body.hp-ui [data-category="wordiness"] { --cat: var(--hx-amber); }
body.hp-ui [data-category="tone"] { --cat: var(--hx-royal); }
body.hp-ui [data-category="grammar"] { --cat: var(--hx-danger); }
body.hp-ui [data-category="word_choice"] { --cat: var(--hx-ok); }
body.hp-ui [data-category="clarity"] { --cat: var(--hx-warn); }
body.hp-ui [data-category="structure"] { --cat: var(--hx-ink-2); }

body.hp-ui .hp-learn-card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
body.hp-ui .hp-learn-num { color: var(--hx-quill); font: italic 400 1.45rem/1 var(--hx-f-display); font-variant-numeric: lining-nums; }
body.hp-ui .hp-learn-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px 3px 8px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--cat, var(--hx-royal)) 13%, var(--hx-surface));
    color: var(--hx-ink);
    font: 700 .72rem/1.4 var(--hx-f-body);
    white-space: nowrap;
}
body.hp-ui .hp-learn-chip::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cat, var(--hx-royal)); }

body.hp-ui .hp-learn-pair {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 10px;
    margin: 12px 0 8px;
    font: 400 1.18rem/1.35 var(--hx-f-display);
}
body.hp-ui .hp-learn-was {
    color: var(--hx-ink-3);
    text-decoration: line-through;
    text-decoration-color: color-mix(in srgb, var(--hx-danger) 55%, transparent);
    text-decoration-thickness: 1px;
    overflow-wrap: anywhere;
}
body.hp-ui .hp-learn-was:lang(ar), body.hp-ui .hp-learn-was[dir="rtl"] { font-family: var(--hx-f-body); font-size: 1.02rem; }
body.hp-ui .hp-learn-now {
    color: var(--hx-royal-ink);
    background: linear-gradient(transparent 62%, color-mix(in srgb, var(--hx-quill) 30%, transparent) 62%);
    overflow-wrap: anywhere;
}
body.hp-ui .hp-learn-arrow { display: inline-flex; color: var(--hx-quill); }
body.hp-ui .hp-learn-arrow svg { width: 15px; height: 15px; fill: none; stroke: currentColor; }

body.hp-ui .hp-learn-why { margin: 0; color: var(--hx-ink-2); font: 400 .9rem/1.55 var(--hx-f-body); }
body.hp-ui .hp-learn-rule {
    margin: 10px 0 0;
    padding: 8px 12px;
    border-inline-start: 3px solid var(--hx-quill);
    border-start-end-radius: 10px;
    border-end-end-radius: 10px;
    background: color-mix(in srgb, var(--hx-quill-soft) 70%, transparent);
    color: var(--hx-ink);
    font: 400 .86rem/1.5 var(--hx-f-body);
}
body.hp-ui .hp-learn-rule[hidden] { display: none; }
body.hp-ui .hp-learn-rule-label {
    display: block;
    margin-bottom: 2px;
    color: var(--hx-quill-ink);
    font: 700 .66rem/1.3 var(--hx-f-body);
    letter-spacing: .14em;
    text-transform: uppercase;
}
html[lang="ar"] body.hp-ui .hp-learn-rule-label { font-size: .76rem; letter-spacing: 0; }

body.hp-ui .hp-learn-card-actions { display: flex; flex-wrap: wrap; gap: 6px 8px; margin-top: auto; padding-top: 12px; }
body.hp-ui :is(.hp-learn-save, .hp-learn-find) {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 32px;
    padding: 0 12px;
    border: 1px solid var(--hx-line-2);
    border-radius: 999px;
    background: transparent;
    color: var(--hx-royal-ink);
    font: 700 .78rem/1 var(--hx-f-body);
    cursor: pointer;
    transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}
body.hp-ui :is(.hp-learn-save, .hp-learn-find) svg { width: 14px; height: 14px; fill: none; stroke: currentColor; }
body.hp-ui :is(.hp-learn-save, .hp-learn-find):hover { background: var(--hx-royal-soft); border-color: color-mix(in srgb, var(--hx-royal) 35%, transparent); }
body.hp-ui .hp-learn-find { padding: 0 8px; border-color: transparent; color: var(--hx-ink-3); }
body.hp-ui .hp-learn-find[hidden] { display: none; }
body.hp-ui .hp-learn-save.is-saved { border-color: color-mix(in srgb, var(--hx-ok) 40%, transparent); background: var(--hx-ok-soft); color: var(--hx-ok); cursor: default; }
body.hp-ui .hp-learn-save[aria-busy="true"] { cursor: progress; opacity: .7; }

/* Loading cards */
body.hp-ui .hp-learn-card.is-skeleton { gap: 12px; min-height: 150px; box-shadow: none; }
body.hp-ui .hp-learn-card.is-skeleton::before { display: none; }
body.hp-ui .hp-learn-bone {
    display: block;
    height: 12px;
    border-radius: 6px;
    background: var(--hx-line);
    animation: hp-learn-pulse 1.4s ease-in-out 10;
}
body.hp-ui .hp-learn-bone.is-short { width: 34%; }
body.hp-ui .hp-learn-bone.is-mid { width: 72%; }
@keyframes hp-learn-pulse {
    50% { opacity: .45; }
}

body.hp-ui .hp-learn-panel-foot {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 16px;
    margin-top: 16px;
}
body.hp-ui .hp-learn-allowance { margin: 0; color: var(--hx-ink-3); font: 400 .8rem/1.5 var(--hx-f-body); }
body.hp-ui .hp-learn-allowance a { color: var(--hx-royal-ink); font-weight: 700; }

/* The phrase in the text while its card is hovered or focused (CSS Custom Highlight API). */
::highlight(hp-learn-now) { background-color: color-mix(in srgb, var(--hx-quill) 42%, transparent); color: var(--hx-ink); }
::highlight(hp-learn-was) { background-color: color-mix(in srgb, var(--hx-danger) 24%, transparent); color: var(--hx-ink); }

/* ---------- "My voice" in the writing controls ---------- */

body.hp-ui .hp-voice {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 4px 12px;
    margin-top: 12px;
    padding: 12px 14px;
    border: 1px solid var(--hx-line);
    border-radius: 16px;
    background: color-mix(in srgb, var(--hx-surface) 80%, transparent);
    transition: border-color .2s ease, background-color .2s ease;
}
body.hp-ui .hp-voice.is-on { border-color: color-mix(in srgb, var(--hx-quill) 60%, transparent); background: color-mix(in srgb, var(--hx-quill-soft) 75%, transparent); }
body.hp-ui .hp-voice-switch {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    justify-self: start;
    padding: 2px 0;
    border: 0;
    background: none;
    color: var(--hx-ink);
    font: 700 .9rem/1.2 var(--hx-f-body);
    cursor: pointer;
}
body.hp-ui .hp-voice-switch[aria-checked="true"] .hp-switch-track { background: var(--hx-quill); }
body.hp-ui .hp-voice-switch[aria-checked="true"] .hp-switch-thumb { inset-inline-start: 17px; }
body.hp-ui .hp-voice-hint { grid-column: 1 / -1; margin: 0; color: var(--hx-ink-3); font: 400 .78rem/1.45 var(--hx-f-body); }
body.hp-ui .hp-voice-edit { grid-row: 1; grid-column: 2; justify-self: end; color: var(--hx-royal-ink); font: 700 .78rem/1.2 var(--hx-f-body); text-decoration: underline; text-underline-offset: 3px; }

body.hp-ui .hp-voice-cta,
body.hp-ui .hp-voice-upsell {
    grid-template-columns: auto minmax(0, 1fr) auto;
    border-style: dashed;
    border-color: var(--hx-line-2);
    color: var(--hx-ink);
    text-decoration: none;
}
body.hp-ui .hp-voice-cta:hover { border-color: var(--hx-quill); background: color-mix(in srgb, var(--hx-quill-soft) 60%, transparent); }
body.hp-ui .hp-voice-cta-copy { display: grid; gap: 1px; margin: 0; min-width: 0; }
body.hp-ui .hp-voice-cta-copy strong { font: 700 .86rem/1.3 var(--hx-f-body); color: var(--hx-ink); }
body.hp-ui .hp-voice-cta-copy span { font: 400 .78rem/1.4 var(--hx-f-body); color: var(--hx-ink-3); }
body.hp-ui .hp-voice-cta-arrow { width: 16px; height: 16px; fill: none; stroke: var(--hx-quill-ink); }
body.hp-ui .hp-voice-plans {
    padding: 6px 12px;
    border: 1px solid var(--hx-line-2);
    border-radius: 999px;
    color: var(--hx-royal-ink);
    font: 700 .76rem/1 var(--hx-f-body);
    text-decoration: none;
    white-space: nowrap;
}
body.hp-ui .hp-voice-plans:hover { background: var(--hx-royal-soft); }

/* ---------- Dashboard card ---------- */

body.hp-ui .hp-learn-mini {
    margin-top: 16px;
    padding: 16px 18px;
    border: 1px solid var(--hx-line);
    border-radius: 18px;
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--hx-quill-soft) 80%, transparent), transparent 60%),
        var(--hx-surface);
}
body.hp-ui .hp-learn-mini-head { display: flex; align-items: center; gap: 12px; }
body.hp-ui .hp-learn-mini-title { margin: 2px 0 0; color: var(--hx-ink); font: 400 1.3rem/1.15 var(--hx-f-display); }
body.hp-ui .hp-learn-mini-text,
body.hp-ui .hp-learn-mini-stats { margin: 10px 0 0; color: var(--hx-ink-2); font: 400 .86rem/1.5 var(--hx-f-body); }
body.hp-ui .hp-learn-mini-stats { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px; }
body.hp-ui .hp-learn-mini-stats strong { color: var(--hx-ink); font: 400 1.25rem/1 var(--hx-f-display); }
body.hp-ui .hp-learn-mini-dot { color: var(--hx-quill); }
body.hp-ui .hp-learn-mini-actions { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 12px; }
body.hp-ui .hp-learn-mini-actions .is-voice { margin-inline-start: auto; }

@media (prefers-reduced-motion: reduce) {
    body.hp-ui :is(.hp-learn-btn, .hp-learn-card, .hp-voice, .hp-learn-save, .hp-learn-find) { transition: none; }
    body.hp-ui .hp-learn-card:is(:hover, .is-active),
    body.hp-ui .hp-learn-btn:hover { transform: none; }
    body.hp-ui .hp-learn-bone { animation: none; }
}

@media print {
    body.hp-ui .hp-learn-strip { display: none; }
}