/**
 * Article trainer layout — isolated from style.css cache / sentence width.
 * Buttons + feedback: fixed 780px column. Cloze sentence: viewport-centered overlay.
 */

#view-trainer .article-trainer-stage {
    width: 100%;
    max-width: none;
    min-width: 0;
    align-items: center;
}

#view-trainer .article-trainer-focus {
    position: relative;
    width: min(780px, 100%);
    max-width: 780px;
    min-width: 0;
    margin-inline: auto;
    contain: none;
}

#view-trainer .article-trainer-interaction {
    width: min(780px, 100%);
    max-width: 780px;
    min-width: 0;
    margin-inline: auto;
    flex-shrink: 0;
    box-sizing: border-box;
}

#view-trainer .article-trainer-interaction .article-trainer-answer,
#view-trainer .article-trainer-interaction .article-trainer-footer,
#view-trainer .article-trainer-interaction .word-mastery-panel {
    width: 100%;
    max-width: 780px;
    min-width: 0;
    box-sizing: border-box;
}

#view-trainer .article-trainer-interaction .article-answer-input-wrap {
    width: 100%;
    max-width: 420px;
    margin-inline: auto;
}

/* Buttons themselves: let style.css define the compact size (flex 1, max-width 112). */
/* We only ensure the row is centered and not stretched by parent rules. */
#view-trainer .article-trainer-interaction .article-buttons {
    margin-inline: auto;
    box-sizing: border-box;
}

#view-trainer .article-trainer-interaction .article-trainer-result,
#view-trainer .article-trainer-interaction .article-answer-compare,
#view-trainer .article-trainer-interaction .article-trainer-feedback {
    width: 100%;
    max-width: 780px;
    box-sizing: border-box;
}

/* Cloze: viewport-centered sentence, translation stays in flow below */
#view-trainer .article-trainer-focus--cloze {
    contain: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

#view-trainer .article-trainer-focus--cloze .trainer-sentence-rail:not(.hidden) {
    position: relative;
    top: auto;
    left: auto;
    transform: none;
    width: 100%;
    max-width: none;
    margin-left: 0;
    margin-right: 0;
    display: flex;
    justify-content: center;
    padding-inline: clamp(12px, 3vw, 28px);
    box-sizing: border-box;
    pointer-events: none;
    z-index: 0;
}

#view-trainer .article-trainer-focus--cloze .trainer-sentence {
    pointer-events: auto;
    position: static;
    left: auto;
    transform: none;
    width: max-content;
    max-width: none;
    margin: 0;
    white-space: nowrap;
    text-align: left;
}

#view-trainer .article-trainer-focus--cloze #trainer-translation:not(.hidden) {
    position: relative;
    z-index: 1;
    width: 100%;
    margin: 8px 0 0;
    text-align: center;
    flex-shrink: 0;
}

#view-trainer .article-trainer-focus--cloze #trainer-word.hidden {
    display: none;
    margin: 0;
}

.trainer-card--loading #trainer-word,
.trainer-card--loading #trainer-sentence,
.trainer-card--loading #cases-sentence,
.trainer-card--loading #plural-prompt,
.trainer-card--loading #singular-prompt {
    color: transparent;
    position: relative;
    min-height: 1.1em;
}

.trainer-card--loading #trainer-word::after,
.trainer-card--loading #trainer-sentence::after,
.trainer-card--loading #cases-sentence::after,
.trainer-card--loading #plural-prompt::after,
.trainer-card--loading #singular-prompt::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 1.75rem;
    height: 1.75rem;
    margin: -0.875rem 0 0 -0.875rem;
    border: 2px solid rgba(95, 99, 104, 0.2);
    border-top-color: #5b8def;
    border-radius: 50%;
    animation: trainer-card-spin 0.8s linear infinite;
}

@keyframes trainer-card-spin {
    to { transform: rotate(360deg); }
}