.study-page {
    width: min(100%, 980px);
    margin: 0 auto;
}

.study-local-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    width: fit-content;
    padding: 7px 10px;
    color: var(--color-success);
    background: rgba(62, 214, 160, .08);
    border: 1px solid rgba(62, 214, 160, .2);
    border-radius: var(--radius-pill);
    font-size: .75rem;
    font-weight: 750;
}

.study-local-badge .ui-icon { width: 15px; height: 15px; }

.study-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 32px;
    margin-top: 18px;
    padding: 28px;
    background:
        radial-gradient(circle at 100% 0, rgba(124, 92, 255, .16), transparent 38%),
        var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.study-hero h1 { margin: 14px 0 7px; font-size: clamp(1.65rem, 4vw, 2.4rem); letter-spacing: -.035em; }
.study-hero p { max-width: 620px; margin: 0; color: var(--color-text-secondary); }

.study-context-summary {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 3px 18px;
    min-width: 260px;
    padding: 15px 17px;
    background: rgba(5, 7, 12, .42);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.study-context-summary strong { font-size: 1.08rem; }
.study-context-summary span { grid-row: 2; color: var(--color-text-muted); font-size: .68rem; }

.study-config { display: flex; flex-direction: column; gap: 14px; margin-top: 16px; }
.study-config__section { padding: 23px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.study-config__row { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.study-config__heading { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 18px; }
.study-config__heading > span { width: 29px; height: 29px; display: grid; place-items: center; flex: 0 0 auto; color: var(--color-primary); background: var(--color-primary-soft); border-radius: 9px; font-size: .75rem; font-weight: 850; }
.study-config__heading h2 { margin: 1px 0 2px; font-size: 1rem; }
.study-config__heading p { margin: 0; color: var(--color-text-muted); font-size: .78rem; }
.study-config__row .study-config__heading { margin-bottom: 0; }

.study-choice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.study-choice-card, .study-type-card, .study-model-card { position: relative; cursor: pointer; }
.study-choice-card input, .study-type-card input, .study-model-card input { position: absolute; opacity: 0; pointer-events: none; }
.study-choice-card > span { min-height: 84px; display: flex; flex-direction: column; gap: 4px; padding: 15px; background: var(--color-surface-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: var(--transition-fast); }
.study-choice-card strong { font-size: .9rem; }
.study-choice-card small { color: var(--color-text-muted); line-height: 1.4; }
.study-choice-card:hover > span, .study-type-card:hover, .study-model-card:hover > span { border-color: var(--color-border-hover); }
.study-choice-card input:checked + span { background: var(--color-primary-soft); border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(124, 92, 255, .1); }
.study-choice-card input:focus-visible + span, .study-type-card input:focus-visible ~ span, .study-model-card input:focus-visible + span { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.study-type-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.study-type-card { min-height: 92px; display: flex; align-items: flex-start; gap: 11px; padding: 14px; background: var(--color-surface-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: var(--transition-fast); }
.study-type-card > span:last-child { display: flex; flex-direction: column; gap: 3px; }
.study-type-card small { color: var(--color-text-muted); font-size: .7rem; line-height: 1.35; }
.study-type-card__icon { width: 33px; height: 33px; display: grid; place-items: center; flex: 0 0 auto; color: var(--color-text-muted); background: rgba(255, 255, 255, .035); border-radius: 9px; }
.study-type-card__icon .ui-icon { width: 17px; height: 17px; }
.study-type-card:has(input:checked) { background: var(--color-primary-soft); border-color: var(--color-primary); }
.study-type-card:has(input:checked) .study-type-card__icon { color: #fff; background: var(--color-primary); }
.study-type-grid + .auth-form__alert { margin-top: 12px; }

.study-count-field { min-width: 150px; }
.study-model-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.study-model-card > span { min-height: 150px; display: flex; flex-direction: column; gap: 6px; padding: 17px; background: var(--color-surface-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: var(--transition-fast); }
.study-model-card input:checked + span { background: var(--color-primary-soft); border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(124, 92, 255, .1); }
.study-model-card__top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.study-model-card__top em { padding: 4px 7px; color: var(--color-primary); background: rgba(124, 92, 255, .12); border-radius: var(--radius-pill); font-size: .62rem; font-style: normal; }
.study-model-card b { font-size: .78rem; }
.study-model-card small { color: var(--color-text-muted); font-size: .72rem; line-height: 1.42; }

.study-active-model { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; padding: 14px 15px; background: rgba(62, 214, 160, .055); border: 1px solid rgba(62, 214, 160, .2); border-radius: var(--radius-md); }
.study-active-model > span { width: 31px; height: 31px; display: grid; place-items: center; color: var(--color-success); background: rgba(62, 214, 160, .11); border-radius: 9px; }
.study-active-model > span .ui-icon { width: 17px; height: 17px; }
.study-active-model > div { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.study-active-model small { color: var(--color-text-muted); }
.study-active-model > a { color: var(--color-primary); font-size: .76rem; font-weight: 750; }

.study-quality-toggle { display: flex; align-items: flex-start; gap: 11px; margin-top: 12px; padding: 14px; cursor: pointer; background: rgba(255, 255, 255, .018); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.study-quality-toggle > input { position: absolute; opacity: 0; }
.study-quality-toggle > span:nth-child(2) { width: 27px; height: 27px; display: grid; place-items: center; flex: 0 0 auto; color: transparent; background: var(--color-surface-secondary); border: 1px solid var(--color-border-hover); border-radius: 8px; }
.study-quality-toggle > span:nth-child(2) .ui-icon { width: 16px; height: 16px; }
.study-quality-toggle input:checked + span { color: white; background: var(--color-primary); border-color: var(--color-primary); }
.study-quality-toggle > span:last-child { display: flex; flex-direction: column; gap: 2px; }
.study-quality-toggle small { color: var(--color-text-muted); font-size: .72rem; }

.study-privacy-note { display: flex; align-items: flex-start; gap: 12px; padding: 17px 19px; color: var(--color-success); background: rgba(62, 214, 160, .06); border: 1px solid rgba(62, 214, 160, .18); border-radius: var(--radius-lg); }
.study-privacy-note > .ui-icon { width: 21px; height: 21px; flex: 0 0 auto; }
.study-privacy-note p { margin: 3px 0 0; color: var(--color-text-secondary); font-size: .78rem; line-height: 1.5; }
.study-generate { width: 100%; min-height: 52px; font-size: .96rem; }

.study-empty { min-height: 440px; display: flex; flex-direction: column; align-items: center; justify-content: center; margin-top: 18px; padding: 35px; text-align: center; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); }
.study-empty > span { width: 60px; height: 60px; display: grid; place-items: center; color: var(--color-primary); background: var(--color-primary-soft); border-radius: 18px; }
.study-empty > span .ui-icon { width: 28px; height: 28px; }
.study-empty h1 { margin: 18px 0 6px; font-size: 1.45rem; }
.study-empty p { max-width: 560px; margin: 4px auto; color: var(--color-text-secondary); }
.study-empty .app-button, .study-empty .button-row { margin-top: 18px; }
.study-empty--error > span { color: var(--color-danger); background: rgba(239, 98, 108, .1); }

.study-generating { min-height: min(720px, calc(100vh - 80px)); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.study-generating__visual { width: 120px; height: 120px; display: grid; place-items: center; margin-bottom: 20px; border: 1px solid var(--color-primary-border); border-radius: 50%; background: radial-gradient(circle, rgba(124, 92, 255, .2), transparent 65%); animation: study-pulse 2s ease-in-out infinite; }
.study-ai-orbit { width: 61px; height: 61px; display: grid; place-items: center; color: white; background: var(--gradient-primary); border-radius: 19px; font-size: 1.2rem; font-weight: 850; box-shadow: 0 0 45px rgba(124, 92, 255, .35); }
@keyframes study-pulse { 50% { transform: scale(1.04); box-shadow: 0 0 60px rgba(124, 92, 255, .13); } }
.study-generating h1 { margin: 18px 0 6px; font-size: clamp(1.4rem, 4vw, 2rem); }
.study-generating > p { max-width: 600px; margin: 4px 0; color: var(--color-text-secondary); }
.study-generation-progress { width: min(100%, 590px); height: 9px; overflow: hidden; margin-top: 26px; background: var(--color-surface-secondary); border-radius: var(--radius-pill); }
.study-generation-progress > div { width: 4%; height: 100%; background: var(--gradient-primary); border-radius: inherit; transition: width .35s ease; }
.study-generation-percent { min-height: 22px; font-size: .78rem; }
.study-generation-facts { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; margin: 16px 0 24px; }
.study-generation-facts span { display: inline-flex; align-items: center; gap: 6px; padding: 7px 10px; color: var(--color-text-muted); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-pill); font-size: .7rem; }
.study-generation-facts .ui-icon { width: 14px; height: 14px; }

.study-session { width: min(100%, 820px); }
.study-session__header { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 13px; }
.study-session__header > div { display: flex; flex-direction: column; min-width: 0; }
.study-session__header strong, .study-session__header span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.study-session__header span { color: var(--color-text-muted); font-size: .72rem; }
.study-icon-button { width: 42px; height: 42px; display: grid; place-items: center; cursor: pointer; color: var(--color-text-secondary); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 12px; }
.study-icon-button .ui-icon { width: 19px; height: 19px; }
.study-session__counter { padding: 7px 10px; color: var(--color-text-secondary) !important; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-pill); }
.study-session__progress { height: 5px; overflow: hidden; margin: 15px 0 18px; background: var(--color-surface-secondary); border-radius: var(--radius-pill); }
.study-session__progress > div { height: 100%; background: var(--gradient-primary); border-radius: inherit; transition: width .25s ease; }

.study-question-card { padding: clamp(20px, 5vw, 36px); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); box-shadow: var(--shadow-medium); }
.study-question-card__meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--color-text-muted); font-size: .7rem; text-transform: uppercase; letter-spacing: .04em; }
.study-question-card__meta span { display: inline-flex; align-items: center; gap: 6px; }
.study-question-card__meta .ui-icon { width: 15px; height: 15px; color: var(--color-primary); }
.study-question-card > h1 { margin: 22px 0 27px; font-size: clamp(1.18rem, 3.5vw, 1.65rem); line-height: 1.42; letter-spacing: -.02em; }
.study-answer-list { display: grid; gap: 9px; }
.study-answer { width: 100%; min-height: 54px; display: flex; align-items: center; gap: 12px; padding: 10px 13px; cursor: pointer; color: var(--color-text-secondary); text-align: left; background: var(--color-surface-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: var(--transition-fast); }
.study-answer:hover { color: var(--color-text); border-color: var(--color-border-hover); transform: translateY(-1px); }
.study-answer > span { width: 30px; height: 30px; display: grid; place-items: center; flex: 0 0 auto; color: var(--color-text-muted); background: rgba(255, 255, 255, .035); border-radius: 8px; font-size: .72rem; }
.study-answer.selected { color: var(--color-text); background: var(--color-primary-soft); border-color: var(--color-primary); }
.study-answer.selected > span { color: white; background: var(--color-primary); }
.study-next { min-width: 190px; margin: 20px 0 0 auto; }

.study-written-answer { display: flex; flex-direction: column; gap: 9px; }
.study-written-answer label { color: var(--color-text-secondary); font-size: .78rem; font-weight: 700; }
.study-written-answer input, .study-written-answer textarea, .study-matching select { width: 100%; padding: 12px 13px; color: var(--color-text); background: var(--color-surface-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); outline: 0; }
.study-written-answer input:focus, .study-written-answer textarea:focus, .study-matching select:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-soft); }
.study-written-answer .app-button { align-self: flex-end; margin-top: 5px; }
.study-self-review { margin-top: 12px; padding: 17px; background: var(--color-primary-soft); border: 1px solid var(--color-primary-border); border-radius: var(--radius-md); }
.study-self-review > span, .study-feedback__answer > span { display: block; margin-bottom: 5px; color: var(--color-text-muted); font-size: .68rem; text-transform: uppercase; }
.study-self-review > strong { display: block; line-height: 1.5; }
.study-self-review .button-row { justify-content: flex-end; margin-top: 16px; }
.study-flashcard { min-height: 180px; display: grid; place-items: center; padding: 22px; background: linear-gradient(145deg, var(--color-surface-secondary), rgba(124, 92, 255, .08)); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }

.study-matching { display: grid; gap: 9px; }
.study-matching label { display: grid; grid-template-columns: minmax(140px, .8fr) minmax(180px, 1.2fr); align-items: center; gap: 12px; padding: 10px 12px; background: var(--color-surface-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.study-matching label > strong { font-size: .82rem; }
.study-matching .app-button { justify-self: end; margin-top: 8px; }

.study-feedback { padding: 19px; border-radius: var(--radius-lg); }
.study-feedback--correct { background: rgba(62, 214, 160, .07); border: 1px solid rgba(62, 214, 160, .22); }
.study-feedback--wrong { background: rgba(245, 185, 76, .07); border: 1px solid rgba(245, 185, 76, .22); }
.study-feedback__title { display: flex; align-items: center; gap: 11px; }
.study-feedback__title > .ui-icon { width: 29px; height: 29px; padding: 6px; color: var(--color-success); background: rgba(62, 214, 160, .12); border-radius: 9px; }
.study-feedback--wrong .study-feedback__title > .ui-icon { color: var(--color-warning); background: rgba(245, 185, 76, .12); }
.study-feedback__title span { color: var(--color-text-muted); font-size: .67rem; text-transform: uppercase; }
.study-feedback__title h3 { margin: 1px 0 0; font-size: 1rem; }
.study-feedback__answer { margin: 16px 0 10px; padding: 13px; background: rgba(0, 0, 0, .14); border-radius: var(--radius-md); }
.study-feedback__answer ul { margin: 0; padding-left: 19px; }
.study-feedback > p { color: var(--color-text-secondary); line-height: 1.55; }
.study-feedback > small { display: flex; align-items: center; gap: 5px; color: var(--color-text-muted); }
.study-feedback > small .ui-icon { width: 14px; height: 14px; }

.study-results { display: flex; flex-direction: column; align-items: center; padding-top: 20px; text-align: center; }
.study-results__score { width: 164px; height: 164px; display: grid; place-items: center; margin-top: 25px; background: conic-gradient(var(--color-primary) var(--score), var(--color-surface-secondary) 0); border-radius: 50%; }
.study-results__score::before { content: ''; grid-area: 1/1; width: 138px; height: 138px; background: var(--color-background); border-radius: 50%; }
.study-results__score > div { grid-area: 1/1; z-index: 1; display: flex; flex-direction: column; }
.study-results__score strong { font-size: 2rem; }
.study-results__score span { color: var(--color-text-muted); font-size: .75rem; }
.study-results > h1 { margin: 19px 0 4px; }
.study-results > p { margin: 0; color: var(--color-text-muted); }
.study-results__stats { width: min(100%, 620px); display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin-top: 23px; }
.study-results__stats > div { display: flex; flex-direction: column; padding: 15px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.study-results__stats span { color: var(--color-text-muted); font-size: .7rem; }
.study-results__actions { justify-content: center; margin-top: 20px; }
.study-results__review { width: 100%; margin-top: 30px; text-align: left; }
.study-results__review h2 { font-size: 1rem; }
.study-results__review article { display: flex; align-items: flex-start; gap: 11px; margin-top: 8px; padding: 13px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.study-results__review article > span { width: 28px; height: 28px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 8px; }
.study-results__review article.correct > span { color: var(--color-success); background: rgba(62, 214, 160, .1); }
.study-results__review article.wrong > span { color: var(--color-warning); background: rgba(245, 185, 76, .1); }
.study-results__review article .ui-icon { width: 16px; height: 16px; }
.study-results__review article > div { display: flex; flex-direction: column; gap: 3px; }
.study-results__review article small { color: var(--color-text-muted); }

.settings-page__card--ai { grid-column: 1 / -1; scroll-margin-top: 78px; }
.ai-settings-heading { margin-bottom: 17px; }
.ai-settings-loading { min-height: 150px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; color: var(--color-text-muted); text-align: center; }
.ai-settings-loading p { margin: 0; }
.ai-settings-spinner { width: 28px; height: 28px; border: 3px solid var(--color-border); border-top-color: var(--color-primary); border-radius: 50%; animation: ai-settings-spin .8s linear infinite; }
@keyframes ai-settings-spin { to { transform: rotate(360deg); } }

.ai-device-status, .ai-installation-summary { display: flex; align-items: flex-start; gap: 12px; padding: 14px 15px; border-radius: var(--radius-md); }
.ai-device-status > span, .ai-installation-summary > span { width: 31px; height: 31px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 9px; }
.ai-device-status .ui-icon, .ai-installation-summary .ui-icon { width: 17px; height: 17px; }
.ai-device-status strong, .ai-installation-summary strong { display: block; font-size: .87rem; }
.ai-device-status p, .ai-installation-summary p { margin: 3px 0 0; color: var(--color-text-secondary); font-size: .76rem; line-height: 1.5; }
.ai-device-status--ready { color: var(--color-success); background: rgba(62, 214, 160, .06); border: 1px solid rgba(62, 214, 160, .2); }
.ai-device-status--ready > span { background: rgba(62, 214, 160, .12); }
.ai-device-status--error { color: var(--color-danger); background: rgba(239, 98, 108, .065); border: 1px solid rgba(239, 98, 108, .22); }
.ai-device-status--error > span { background: rgba(239, 98, 108, .12); }
.ai-device-status p { color: var(--color-text-secondary); }

.ai-troubleshooting { margin-top: 12px; padding: 16px; background: var(--color-surface-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.ai-troubleshooting p { margin: 5px 0 14px; color: var(--color-text-secondary); font-size: .8rem; line-height: 1.5; }
.ai-installation-summary { margin-top: 12px; color: var(--color-warning); background: rgba(245, 185, 76, .055); border: 1px solid rgba(245, 185, 76, .18); }
.ai-installation-summary > span { background: rgba(245, 185, 76, .1); }
.ai-installation-summary.ready { color: var(--color-success); background: rgba(62, 214, 160, .045); border-color: rgba(62, 214, 160, .18); }
.ai-installation-summary.ready > span { background: rgba(62, 214, 160, .1); }

.ai-model-picker { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 13px; }
.ai-model-option { position: relative; cursor: pointer; }
.ai-model-option > input { position: absolute; opacity: 0; pointer-events: none; }
.ai-model-option__body { min-height: 170px; display: flex; flex-direction: column; gap: 5px; padding: 16px; background: var(--color-surface-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: var(--transition-fast); }
.ai-model-option input:checked + .ai-model-option__body { background: var(--color-primary-soft); border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(124, 92, 255, .1); }
.ai-model-option input:focus-visible + .ai-model-option__body { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.ai-model-option__top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.ai-model-option__badges { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }
.ai-model-option__badges em { padding: 3px 7px; color: var(--color-primary); background: rgba(124, 92, 255, .13); border-radius: var(--radius-pill); font-size: .6rem; font-style: normal; }
.ai-model-option__badges em.ready { color: var(--color-success); background: rgba(62, 214, 160, .1); }
.ai-model-option__body > b { font-size: .76rem; }
.ai-model-option__body > small { color: var(--color-text-muted); font-size: .72rem; line-height: 1.4; }
.ai-model-option__requirements { display: flex; flex-direction: column; gap: 5px; margin-top: auto; padding-top: 8px; color: var(--color-text-secondary); font-size: .68rem; }
.ai-model-option__requirements > span { display: flex; align-items: center; gap: 6px; }
.ai-model-option__requirements .ui-icon { width: 14px; height: 14px; color: var(--color-primary); }

.ai-download-progress { margin-top: 13px; padding: 15px; background: var(--color-surface-secondary); border: 1px solid var(--color-primary-border); border-radius: var(--radius-md); }
.ai-download-progress__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: .79rem; }
.ai-download-progress__track { height: 8px; overflow: hidden; margin-top: 10px; background: var(--color-border); border-radius: var(--radius-pill); }
.ai-download-progress__track > div { width: 2%; height: 100%; background: var(--gradient-primary); border-radius: inherit; transition: width .25s ease; }
.ai-download-progress p { margin: 7px 0 0; color: var(--color-text-muted); font-size: .7rem; }
.ai-settings-message { margin-top: 12px; padding: 10px 12px; color: var(--color-success); background: rgba(62, 214, 160, .06); border: 1px solid rgba(62, 214, 160, .18); border-radius: var(--radius-md); font-size: .77rem; }
.ai-settings-message.error { color: var(--color-danger); background: rgba(239, 98, 108, .07); border-color: rgba(239, 98, 108, .2); }
.ai-settings-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }
.ai-storage-note { margin: 12px 0 0; color: var(--color-text-muted); font-size: .68rem; }

@media (max-width: 760px) {
    .study-hero { grid-template-columns: 1fr; padding: 21px; }
    .study-context-summary { width: 100%; min-width: 0; }
    .study-type-grid { grid-template-columns: repeat(2, 1fr); }
    .study-model-grid { grid-template-columns: 1fr; }
    .ai-model-picker { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
    .study-choice-grid { grid-template-columns: 1fr; }
    .study-choice-card > span { min-height: 0; }
    .study-type-grid { grid-template-columns: 1fr; }
    .study-type-card { min-height: 0; }
    .study-config__section { padding: 18px 15px; }
    .study-config__row { align-items: stretch; flex-direction: column; }
    .study-count-field { min-width: 0; }
    .study-context-summary { gap: 3px 8px; }
    .study-question-card { padding: 20px 15px; border-radius: var(--radius-lg); }
    .study-question-card > h1 { margin: 18px 0 22px; }
    .study-matching label { grid-template-columns: 1fr; gap: 7px; }
    .study-next, .study-written-answer .app-button, .study-matching .app-button { width: 100%; }
    .study-self-review .button-row .app-button { width: 100%; }
    .study-results__stats { grid-template-columns: 1fr; }
    .study-results__actions { width: 100%; }
    .study-results__actions .app-button { width: 100%; }
    .study-active-model { grid-template-columns: auto 1fr; }
    .study-active-model > a { grid-column: 2; }
    .ai-settings-actions .app-button { width: 100%; }
    .ai-model-option__body { min-height: 0; }
}

@media (prefers-reduced-motion: reduce) {
    .study-generating__visual { animation: none; }
    .ai-settings-spinner { animation: none; }
}