/* Shared Study Tools product pages. All selectors are scoped away from the universal layout. */
.study-app-page {
    --study-accent: #f97316;
    --study-accent-soft: #fff0e7;
    --study-accent-deep: #d94d05;
    --study-ink: #172033;
    --study-copy: #617087;
    --study-soft: #8290a3;
    --study-page: #f8fafc;
    --study-surface: #ffffff;
    --study-surface-soft: #f5f7fa;
    --study-line: #e4e9f0;
    --study-shadow: 0 18px 46px rgba(23, 32, 51, 0.08);
    min-height: 100vh;
    padding-bottom: 64px;
    overflow: hidden;
    background:
        radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--study-accent) 9%, transparent), transparent 28rem),
        linear-gradient(180deg, #ffffff 0, var(--study-page) 42rem);
    color: var(--study-copy);
}

/* Account-backed study workspace and shared interaction polish */
.study-app-page{padding-bottom:clamp(64px,8vw,110px)}
.study-app-page+footer{margin-top:0}
.study-account-gate{position:fixed;inset:0;z-index:10000;display:grid;place-items:center;background:color-mix(in srgb,var(--study-bg,#f7f9fc) 92%,transparent);backdrop-filter:blur(12px)}
.study-account-gate>div{width:min(420px,calc(100% - 32px));padding:34px;text-align:center;border:1px solid var(--study-line,#dfe5ee);border-radius:24px;background:var(--study-panel,#fff);color:var(--study-ink,#172033);box-shadow:0 24px 70px rgba(16,31,54,.16)}
.study-account-gate .material-symbols-outlined{display:block;margin:0 auto 14px;color:#ff6b16;font-size:34px}.study-account-gate strong{display:block;font-size:1.08rem}.study-account-gate p{margin:7px 0 0;color:var(--study-muted,#6c788c);font-size:.82rem;line-height:1.55}
.study-report-modal .study-modal-card{position:relative;z-index:1;width:min(520px,calc(100% - 28px));max-height:calc(100vh - 40px);overflow:auto;padding:30px;border-radius:22px;background:var(--study-panel,#fff);color:var(--study-ink,#172033);border:1px solid var(--study-line,#dfe5ee);box-shadow:0 28px 80px rgba(0,0,0,.28)}
.study-report-modal .study-modal-x{position:absolute;top:16px;right:16px;width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--study-line,#dfe5ee);border-radius:10px;background:var(--study-soft,#f5f7fb);color:inherit;cursor:pointer}.study-report-modal .study-modal-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:#fff0e7;color:#f97316}.study-report-modal h2{margin:16px 0 6px}.study-report-modal .study-modal-card>p{margin:0;color:var(--study-muted,#6c788c);line-height:1.6;font-size:.82rem}
.study-report-modal form,.study-report-modal label{display:grid;gap:8px}.study-report-modal form{gap:17px;margin-top:20px}.study-report-modal label{font-size:.8rem;font-weight:700}.study-report-modal label span{font-weight:500;color:var(--study-muted,#6c788c)}
.study-report-modal select,.study-report-modal textarea{width:100%;border:1px solid var(--study-line,#dfe5ee);border-radius:12px;background:var(--study-soft,#f5f7fb);color:var(--study-ink,#172033);padding:12px;font:inherit;resize:vertical}.study-report-modal .study-primary-action{width:100%;min-height:44px;justify-content:center;border:0;border-radius:12px;background:#f97316;color:#fff;font-weight:800;cursor:pointer}
[data-theme="dark"] .study-account-gate{background:rgba(7,15,27,.9)}
[data-theme="dark"] .study-account-gate>div,[data-theme="dark"] .study-report-modal .study-modal-card{background:#111d2e;color:#edf3ff;border-color:#2a3950}
[data-theme="dark"] .study-report-modal select,[data-theme="dark"] .study-report-modal textarea{background:#0c1727;color:#edf3ff;border-color:#30415a;color-scheme:dark}[data-theme="dark"] .study-report-modal .study-modal-x{background:#1b2a3f;color:#eef4ff;border-color:#34465f}
.study-report-question{display:inline-flex;align-items:center;gap:6px}.study-report-question .material-symbols-outlined{font-size:19px}
@media(max-width:650px){.study-app-page{padding-bottom:64px}.study-report-modal .study-modal-card{padding:23px 18px}}

.study-flashcards-page {
    --study-accent: #25a953;
    --study-accent-soft: #e8f8ed;
    --study-accent-deep: #16813a;
}

.study-ai-page {
    --study-accent: #8354d6;
    --study-accent-soft: #f0e9ff;
    --study-accent-deep: #6537b5;
}

[data-theme="dark"] .study-app-page {
    --study-ink: #f3f6fb;
    --study-copy: #aab7c9;
    --study-soft: #8391a6;
    --study-page: #0a1322;
    --study-surface: #121d30;
    --study-surface-soft: #172338;
    --study-line: #29384d;
    --study-shadow: 0 20px 55px rgba(0, 0, 0, 0.26);
    background:
        radial-gradient(circle at 82% 7%, color-mix(in srgb, var(--study-accent) 12%, transparent), transparent 29rem),
        linear-gradient(180deg, #0b1424 0, var(--study-page) 42rem);
}

.study-app-page *,
.study-app-page *::before,
.study-app-page *::after,
.study-modal *,
.study-modal *::before,
.study-modal *::after {
    box-sizing: border-box;
}

.landing-page .study-app-page .container {
    max-width: 1300px;
}

.study-app-page [hidden],
.study-modal[hidden],
.study-modal [hidden] {
    display: none !important;
}

.study-app-hero {
    position: relative;
    padding: 30px 0 54px;
    border-bottom: 1px solid color-mix(in srgb, var(--study-line) 80%, transparent);
}

.study-back-link,
.study-back-link:visited {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 30px;
    color: var(--study-copy);
    font-size: 0.82rem;
    font-weight: 500;
    text-decoration: none;
}

.study-back-link:hover {
    color: var(--study-accent);
}

.study-back-link .material-symbols-outlined {
    font-size: 20px;
}

.study-app-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.18fr) minmax(340px, 0.62fr);
    align-items: center;
    gap: clamp(36px, 7vw, 92px);
}

.study-app-eyebrow,
.study-section-kicker {
    margin: 0;
    color: var(--study-accent);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.075em;
    text-transform: uppercase;
}

.study-app-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 15px;
}

.study-app-eyebrow .material-symbols-outlined {
    font-size: 22px;
}

.study-app-page .study-app-hero-copy h1 {
    max-width: 780px;
    margin: 0;
    color: var(--study-ink);
    font-size: clamp(2.8rem, 5.3vw, 4.6rem);
    font-weight: 700;
    line-height: 1.04;
    letter-spacing: -0.055em;
}

.study-app-hero-copy > p:not(.study-app-eyebrow) {
    max-width: 700px;
    margin: 21px 0 0;
    color: var(--study-copy);
    font-size: clamp(1rem, 1.45vw, 1.16rem);
    line-height: 1.68;
}

.study-app-hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-top: 28px;
}

.study-primary-action,
.study-primary-action:visited,
.study-secondary-action,
.study-secondary-action:visited {
    display: inline-flex;
    min-height: 46px;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.84rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.study-primary-action,
.study-primary-action:visited {
    border: 1px solid var(--study-accent);
    background: linear-gradient(135deg, color-mix(in srgb, var(--study-accent) 91%, #ffffff), var(--study-accent-deep));
    color: #ffffff;
    box-shadow: 0 12px 24px color-mix(in srgb, var(--study-accent) 22%, transparent);
}

.study-primary-action:hover {
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 16px 30px color-mix(in srgb, var(--study-accent) 29%, transparent);
}

.study-primary-action:disabled,
.study-secondary-action:disabled {
    cursor: not-allowed;
    opacity: 0.55;
    transform: none;
    box-shadow: none;
}

.study-secondary-action,
.study-secondary-action:visited {
    border: 1px solid var(--study-line);
    background: color-mix(in srgb, var(--study-surface) 93%, var(--study-accent) 2%);
    color: var(--study-ink);
}

.study-secondary-action:hover {
    border-color: color-mix(in srgb, var(--study-accent) 40%, var(--study-line));
    color: var(--study-accent);
}

.study-primary-action .material-symbols-outlined,
.study-secondary-action .material-symbols-outlined {
    font-size: 20px;
}

.study-primary-action-small {
    min-height: 42px;
    padding: 8px 15px;
}

.study-app-stat-panel {
    display: grid;
    gap: 10px;
    padding: 14px;
    border: 1px solid color-mix(in srgb, var(--study-line) 72%, var(--study-accent) 28%);
    border-radius: 18px;
    background: color-mix(in srgb, var(--study-surface) 88%, var(--study-accent) 3%);
    box-shadow: var(--study-shadow);
}

.study-app-stat-panel article {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    align-items: center;
    gap: 14px;
    min-height: 76px;
    padding: 12px 15px;
    border: 1px solid var(--study-line);
    border-radius: 12px;
    background: var(--study-surface);
}

.study-app-stat-panel article > .material-symbols-outlined {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 11px;
    background: var(--study-accent-soft);
    color: var(--study-accent);
    font-size: 25px;
}

[data-theme="dark"] .study-app-stat-panel article > .material-symbols-outlined {
    background: color-mix(in srgb, var(--study-accent) 17%, transparent);
}

.study-app-stat-panel strong {
    display: block;
    color: var(--study-ink);
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1;
}

.study-app-stat-panel p {
    margin: 6px 0 0;
    color: var(--study-soft);
    font-size: 0.77rem;
}

.study-library-section {
    padding-top: 54px;
}

.study-library-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 22px;
    margin-bottom: 20px;
}

.study-app-page .study-library-heading h2,
.study-app-page .study-community-note h2,
.study-app-page .study-ai-hero-panel h2 {
    margin: 6px 0 0;
    color: var(--study-ink);
    font-size: clamp(1.65rem, 2.6vw, 2.15rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.035em;
}

.study-library-heading > div > p:not(.study-section-kicker) {
    max-width: 720px;
    margin: 7px 0 0;
    color: var(--study-copy);
    font-size: 0.88rem;
}

.study-library-panel {
    overflow: hidden;
    border: 1px solid var(--study-line);
    border-radius: 16px;
    background: var(--study-surface);
    box-shadow: var(--study-shadow);
}

.study-library-tabs {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px 0;
    border-bottom: 1px solid var(--study-line);
}

.study-library-tabs button {
    position: relative;
    display: inline-flex;
    min-height: 49px;
    align-items: center;
    gap: 8px;
    padding: 8px 15px 13px;
    border: 0;
    background: transparent;
    color: var(--study-copy);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
}

.study-library-tabs button::after {
    content: "";
    position: absolute;
    right: 13px;
    bottom: -1px;
    left: 13px;
    height: 2px;
    border-radius: 999px;
    background: transparent;
}

.study-library-tabs button.is-active {
    color: var(--study-accent);
}

.study-library-tabs button.is-active::after {
    background: var(--study-accent);
}

.study-library-tabs .material-symbols-outlined {
    font-size: 20px;
}

.study-library-toolbar {
    display: grid;
    grid-template-columns: minmax(280px, 1fr) 190px 180px;
    gap: 12px;
    padding: 18px;
    background: color-mix(in srgb, var(--study-surface-soft) 72%, var(--study-surface));
}

.study-search-field {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    align-items: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 13px;
    border: 1px solid var(--study-line);
    border-radius: 10px;
    background: var(--study-surface);
}

.study-search-field .material-symbols-outlined {
    color: var(--study-soft);
    font-size: 21px;
}

.study-search-field input,
.study-filter-field select {
    width: 100%;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--study-ink);
    font-family: inherit;
    font-size: 0.78rem;
}

.study-search-field input::placeholder {
    color: var(--study-soft);
}

.study-filter-field {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 7px;
    min-height: 44px;
    padding: 0 11px;
    border: 1px solid var(--study-line);
    border-radius: 10px;
    background: var(--study-surface);
}

.study-filter-field > span {
    color: var(--study-soft);
    font-size: 0.68rem;
}

.study-inline-status {
    padding: 38px 20px;
    color: var(--study-soft);
    font-size: 0.82rem;
    text-align: center;
}

.study-content-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    padding: 18px;
}

.study-library-card {
    display: flex;
    min-width: 0;
    min-height: 365px;
    flex-direction: column;
    padding: 20px;
    border: 1px solid var(--study-line);
    border-radius: 13px;
    background:
        radial-gradient(circle at 84% 2%, color-mix(in srgb, var(--study-accent) 7%, transparent), transparent 10rem),
        var(--study-surface);
    transition: transform 170ms ease, border-color 170ms ease, box-shadow 170ms ease;
}

.study-library-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--study-accent) 36%, var(--study-line));
    box-shadow: 0 17px 32px color-mix(in srgb, var(--study-accent) 10%, transparent);
}

.study-library-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.study-library-icon {
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    border-radius: 11px;
    background: linear-gradient(145deg, color-mix(in srgb, var(--study-accent) 75%, #ffffff), var(--study-accent-deep));
    color: #ffffff;
    box-shadow: 0 10px 20px color-mix(in srgb, var(--study-accent) 20%, transparent);
}

.study-library-icon .material-symbols-outlined {
    font-size: 27px;
}

.study-status-pill {
    display: inline-flex;
    min-height: 25px;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--study-accent-soft);
    color: var(--study-accent-deep);
    font-size: 0.65rem;
    font-weight: 600;
}

[data-theme="dark"] .study-status-pill {
    background: color-mix(in srgb, var(--study-accent) 16%, transparent);
    color: color-mix(in srgb, var(--study-accent) 72%, #ffffff);
}

.study-status-pill.is-draft {
    background: color-mix(in srgb, #f59e0b 13%, var(--study-surface));
    color: #b86b05;
}

.study-status-pill.is-due {
    background: color-mix(in srgb, #ef4444 11%, var(--study-surface));
    color: #dc2626;
}

.study-card-subject {
    margin: 18px 0 4px;
    color: var(--study-accent);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.055em;
    text-transform: uppercase;
}

.study-app-page .study-library-card h3 {
    margin: 0;
    color: var(--study-ink);
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.02em;
}

.study-card-description {
    display: -webkit-box;
    min-height: 60px;
    margin: 9px 0 0;
    overflow: hidden;
    color: var(--study-copy);
    font-size: 0.78rem;
    line-height: 1.55;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.study-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 15px;
    margin-top: 15px;
    color: var(--study-soft);
    font-size: 0.68rem;
}

.study-card-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.study-card-meta .material-symbols-outlined {
    font-size: 16px;
}

.study-card-author {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--study-line);
}

.study-card-author img,
.study-author-row img {
    width: 34px;
    height: 34px;
    flex: 0 0 34px;
    border: 1px solid var(--study-line);
    border-radius: 50%;
    object-fit: cover;
}

.study-card-author small,
.study-author-row small {
    display: block;
    color: var(--study-soft);
    font-size: 0.58rem;
}

.study-card-author strong,
.study-author-row strong {
    display: block;
    margin-top: 1px;
    color: var(--study-ink);
    font-size: 0.72rem;
    font-weight: 600;
}

.study-card-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    margin-top: auto;
    padding-top: 16px;
}

.study-card-actions button,
.study-card-actions a,
.study-card-actions a:visited {
    display: inline-flex;
    min-height: 35px;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 7px 11px;
    border: 1px solid var(--study-line);
    border-radius: 8px;
    background: var(--study-surface);
    color: var(--study-copy);
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.study-card-actions a,
.study-card-actions a:visited {
    border-color: var(--study-accent);
    background: var(--study-accent);
    color: #ffffff;
}

.study-card-actions .material-symbols-outlined {
    font-size: 17px;
}

.study-empty-state {
    grid-column: 1 / -1;
    display: flex;
    min-height: 330px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 48px 24px;
    text-align: center;
}

.study-empty-state > .material-symbols-outlined {
    display: grid;
    width: 62px;
    height: 62px;
    place-items: center;
    border-radius: 16px;
    background: var(--study-accent-soft);
    color: var(--study-accent);
    font-size: 33px;
}

[data-theme="dark"] .study-empty-state > .material-symbols-outlined {
    background: color-mix(in srgb, var(--study-accent) 16%, transparent);
}

.study-app-page .study-empty-state h3 {
    margin: 17px 0 0;
    color: var(--study-ink);
    font-size: 1.3rem;
    font-weight: 700;
}

.study-empty-state p {
    max-width: 520px;
    margin: 8px 0 0;
    color: var(--study-copy);
    font-size: 0.82rem;
}

.study-empty-state button,
.study-empty-badge {
    margin-top: 18px;
}

.study-empty-badge {
    display: inline-flex;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--study-surface-soft);
    color: var(--study-soft);
    font-size: 0.68rem;
    font-weight: 500;
}

.study-community-note {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr) auto;
    align-items: center;
    gap: 20px;
    margin-top: 28px;
    padding-top: 22px;
    padding-bottom: 22px;
    border: 1px solid color-mix(in srgb, var(--study-accent) 24%, var(--study-line));
    border-radius: 14px;
    background: color-mix(in srgb, var(--study-accent-soft) 42%, var(--study-surface));
}

.study-community-note > .material-symbols-outlined {
    display: grid;
    width: 54px;
    height: 54px;
    place-items: center;
    border-radius: 13px;
    background: var(--study-surface);
    color: var(--study-accent);
    font-size: 30px;
}

.study-app-page .study-community-note h2 {
    margin: 0;
    font-size: 1.15rem;
}

.study-community-note p {
    margin: 5px 0 0;
    color: var(--study-copy);
    font-size: 0.76rem;
}

.study-community-note button {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 13px;
    border: 1px solid var(--study-accent);
    border-radius: 9px;
    background: transparent;
    color: var(--study-accent-deep);
    font-family: inherit;
    font-size: 0.74rem;
    font-weight: 600;
    cursor: pointer;
}

.study-community-note button .material-symbols-outlined {
    font-size: 18px;
}

/* Creator modal */
body.study-modal-open {
    overflow: hidden;
}

.study-modal {
    position: fixed;
    inset: 0;
    z-index: 60000;
    display: grid;
    place-items: center;
    padding: 22px;
}

.study-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(3, 8, 18, 0.72);
    backdrop-filter: blur(7px);
}

.study-editor-dialog {
    --study-ink: #172033;
    --study-copy: #617087;
    --study-soft: #8290a3;
    --study-surface: #ffffff;
    --study-surface-soft: #f6f8fb;
    --study-line: #e4e9f0;
    position: relative;
    z-index: 1;
    display: flex;
    width: min(1080px, 96vw);
    max-height: min(900px, 94vh);
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--study-line);
    border-radius: 17px;
    background: var(--study-surface);
    box-shadow: 0 32px 90px rgba(0, 0, 0, 0.32);
}

[data-theme="dark"] .study-editor-dialog {
    --study-ink: #f3f6fb;
    --study-copy: #aab7c9;
    --study-soft: #8391a6;
    --study-surface: #121d30;
    --study-surface-soft: #172338;
    --study-line: #2b3a50;
}

.study-editor-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 21px 24px;
    border-bottom: 1px solid var(--study-line);
    background: var(--study-surface);
}

.study-editor-header h2 {
    margin: 4px 0 0;
    color: var(--study-ink);
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.study-editor-header p:not(.study-section-kicker) {
    margin: 4px 0 0;
    color: var(--study-copy);
    font-size: 0.75rem;
}

.study-icon-button {
    display: grid;
    width: 38px;
    height: 38px;
    flex: 0 0 38px;
    place-items: center;
    border: 1px solid var(--study-line);
    border-radius: 9px;
    background: var(--study-surface);
    color: var(--study-copy);
    cursor: pointer;
}

.study-icon-button .material-symbols-outlined {
    font-size: 21px;
}

.study-editor-form {
    display: flex;
    min-height: 0;
    flex: 1;
    flex-direction: column;
}

.study-editor-form > .study-editor-section {
    overflow: visible;
}

.study-editor-form {
    overflow-y: auto;
}

.study-editor-section {
    padding: 22px 24px;
    border-bottom: 1px solid var(--study-line);
}

.study-editor-section-heading {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
}

.study-editor-section-heading > span {
    display: grid;
    width: 32px;
    height: 32px;
    place-items: center;
    border-radius: 9px;
    background: var(--study-accent-soft);
    color: var(--study-accent);
    font-size: 0.78rem;
    font-weight: 700;
}

[data-theme="dark"] .study-editor-section-heading > span {
    background: color-mix(in srgb, var(--study-accent) 17%, transparent);
}

.study-editor-section-heading h3 {
    margin: 0;
    color: var(--study-ink);
    font-size: 0.98rem;
    font-weight: 700;
}

.study-editor-section-heading p {
    margin: 2px 0 0;
    color: var(--study-soft);
    font-size: 0.68rem;
}

.study-editor-section-heading-action {
    grid-template-columns: 34px minmax(0, 1fr) auto;
}

.study-editor-section-heading-action > button {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    gap: 5px;
    padding: 7px 11px;
    border: 1px solid var(--study-accent);
    border-radius: 8px;
    background: var(--study-accent-soft);
    color: var(--study-accent-deep);
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
}

.study-editor-section-heading-action .material-symbols-outlined {
    font-size: 18px;
}

.study-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.study-field {
    display: grid;
    align-content: start;
    gap: 6px;
    min-width: 0;
}

.study-field-wide {
    grid-column: 1 / -1;
}

.study-field > span {
    color: var(--study-ink);
    font-size: 0.7rem;
    font-weight: 600;
}

.study-field > span small {
    color: var(--study-soft);
    font-size: 0.62rem;
    font-weight: 400;
}

.study-field input,
.study-field textarea,
.study-field select {
    width: 100%;
    min-height: 42px;
    padding: 10px 12px;
    border: 1px solid var(--study-line);
    border-radius: 9px;
    outline: 0;
    background: var(--study-surface);
    color: var(--study-ink);
    font-family: inherit;
    font-size: 0.76rem;
    line-height: 1.5;
    resize: vertical;
}

.study-field input:focus,
.study-field textarea:focus,
.study-field select:focus {
    border-color: var(--study-accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--study-accent) 12%, transparent);
}

.study-editor-items {
    display: grid;
    gap: 14px;
}

.study-item-editor {
    padding: 16px;
    border: 1px solid var(--study-line);
    border-radius: 12px;
    background: var(--study-surface-soft);
}

.study-item-editor > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.study-item-editor > header span,
.study-item-editor > header small {
    display: block;
}

.study-item-editor > header span {
    color: var(--study-ink);
    font-size: 0.78rem;
    font-weight: 700;
}

.study-item-editor > header small {
    color: var(--study-soft);
    font-size: 0.61rem;
}

.study-item-editor > header button {
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    border: 1px solid color-mix(in srgb, #ef4444 25%, var(--study-line));
    border-radius: 8px;
    background: var(--study-surface);
    color: #dc2626;
    cursor: pointer;
}

.study-item-editor > header .material-symbols-outlined {
    font-size: 18px;
}

.study-option-editor {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
    margin: 11px 0 14px;
}

.study-option-editor label {
    display: grid;
    grid-template-columns: 31px minmax(0, 1fr);
    align-items: center;
    overflow: hidden;
    border: 1px solid var(--study-line);
    border-radius: 9px;
    background: var(--study-surface);
}

.study-option-editor label > span {
    display: grid;
    height: 100%;
    place-items: center;
    border-right: 1px solid var(--study-line);
    color: var(--study-accent);
    font-size: 0.7rem;
    font-weight: 700;
}

.study-option-editor input {
    min-width: 0;
    height: 40px;
    padding: 8px 10px;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--study-ink);
    font-family: inherit;
    font-size: 0.72rem;
}

.study-editor-empty {
    display: flex;
    min-height: 180px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 24px;
    border: 1px dashed var(--study-line);
    border-radius: 12px;
    color: var(--study-soft);
    text-align: center;
}

.study-editor-empty .material-symbols-outlined {
    color: var(--study-accent);
    font-size: 32px;
}

.study-editor-empty strong {
    margin-top: 8px;
    color: var(--study-ink);
    font-size: 0.82rem;
}

.study-editor-empty p {
    margin: 4px 0 0;
    font-size: 0.69rem;
}

.study-editor-actions {
    position: sticky;
    z-index: 2;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 15px 24px;
    border-top: 1px solid var(--study-line);
    background: color-mix(in srgb, var(--study-surface) 94%, transparent);
    backdrop-filter: blur(10px);
}

.study-editor-actions > p {
    margin: 0;
    color: #dc2626;
    font-size: 0.7rem;
}

.study-editor-actions > div {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
    margin-left: auto;
}

/* Detail and player pages */
.study-player-page {
    padding-top: 30px;
}

.study-player-container {
    max-width: 1120px !important;
}

.study-player-loading,
.study-player-error {
    display: flex;
    min-height: 520px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 40px;
    text-align: center;
}

.study-player-loading .material-symbols-outlined,
.study-player-error > .material-symbols-outlined {
    color: var(--study-accent);
    font-size: 38px;
}

.study-player-loading p,
.study-player-error p {
    color: var(--study-copy);
    font-size: 0.85rem;
}

.study-app-page .study-player-error h1 {
    margin: 14px 0 0;
    color: var(--study-ink);
    font-size: 1.8rem;
    font-weight: 700;
}

.study-player-error .study-primary-action {
    margin-top: 16px;
}

.study-detail-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 20px;
    align-items: stretch;
}

.study-detail-main,
.study-session-card,
.study-exam-shell,
.study-flashcard-shell,
.study-results-card {
    border: 1px solid var(--study-line);
    border-radius: 16px;
    background: var(--study-surface);
    box-shadow: var(--study-shadow);
}

.study-detail-main {
    padding: clamp(27px, 4vw, 46px);
}

.study-detail-icon {
    display: grid;
    width: 62px;
    height: 62px;
    margin-bottom: 22px;
    place-items: center;
    border-radius: 15px;
    background: linear-gradient(145deg, color-mix(in srgb, var(--study-accent) 75%, #ffffff), var(--study-accent-deep));
    color: #ffffff;
    box-shadow: 0 13px 28px color-mix(in srgb, var(--study-accent) 23%, transparent);
}

.study-detail-icon .material-symbols-outlined {
    font-size: 34px;
}

.study-app-page .study-detail-main h1 {
    margin: 8px 0 0;
    color: var(--study-ink);
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.045em;
}

.study-detail-main > p:not(.study-section-kicker) {
    max-width: 700px;
    margin: 14px 0 0;
    color: var(--study-copy);
    font-size: 0.9rem;
    line-height: 1.65;
}

.study-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.study-detail-meta > span {
    display: inline-flex;
    min-height: 34px;
    align-items: center;
    gap: 5px;
    padding: 6px 10px;
    border: 1px solid var(--study-line);
    border-radius: 8px;
    background: var(--study-surface-soft);
    color: var(--study-copy);
    font-size: 0.67rem;
}

.study-detail-meta .material-symbols-outlined {
    color: var(--study-accent);
    font-size: 17px;
}

.study-detail-meta strong {
    color: var(--study-ink);
    font-weight: 600;
}

.study-author-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 27px;
    padding-top: 20px;
    border-top: 1px solid var(--study-line);
}

.study-author-row img {
    width: 40px;
    height: 40px;
    flex-basis: 40px;
}

.study-session-card {
    display: flex;
    flex-direction: column;
    padding: 26px;
}

.study-session-card > .material-symbols-outlined {
    display: grid;
    width: 50px;
    height: 50px;
    place-items: center;
    border-radius: 13px;
    background: var(--study-accent-soft);
    color: var(--study-accent);
    font-size: 28px;
}

[data-theme="dark"] .study-session-card > .material-symbols-outlined {
    background: color-mix(in srgb, var(--study-accent) 17%, transparent);
}

.study-app-page .study-session-card h2 {
    margin: 18px 0 0;
    color: var(--study-ink);
    font-size: 1.25rem;
    font-weight: 700;
}

.study-session-card > p {
    margin: 8px 0 0;
    color: var(--study-copy);
    font-size: 0.77rem;
    line-height: 1.55;
}

.study-switch-row {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    margin: 20px 0;
    padding: 12px;
    border: 1px solid var(--study-line);
    border-radius: 10px;
    background: var(--study-surface-soft);
}

.study-switch-row input {
    width: 17px;
    height: 17px;
    accent-color: var(--study-accent);
}

.study-switch-row strong,
.study-switch-row small {
    display: block;
}

.study-switch-row strong {
    color: var(--study-ink);
    font-size: 0.72rem;
}

.study-switch-row small {
    margin-top: 2px;
    color: var(--study-soft);
    font-size: 0.59rem;
}

.study-session-card .study-primary-action,
.study-session-card .study-secondary-action {
    width: 100%;
    margin-top: auto;
}

.study-session-card .study-secondary-action {
    margin-top: 9px;
}

.study-session-note {
    margin-top: 11px !important;
    color: var(--study-soft) !important;
    font-size: 0.62rem !important;
    text-align: center;
}

.study-session-summary {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin: 18px 0;
}

.study-session-summary span {
    padding: 11px;
    border: 1px solid var(--study-line);
    border-radius: 9px;
    background: var(--study-surface-soft);
    color: var(--study-soft);
    font-size: 0.62rem;
    text-align: center;
}

.study-session-summary strong {
    display: block;
    margin-bottom: 3px;
    color: var(--study-ink);
    font-size: 1.2rem;
}

.study-exam-shell,
.study-flashcard-shell {
    overflow: hidden;
}

.study-exam-header {
    display: grid;
    grid-template-columns: minmax(160px, auto) minmax(160px, 1fr) 40px;
    align-items: center;
    gap: 22px;
    padding: 15px 18px;
    border-bottom: 1px solid var(--study-line);
    background: var(--study-surface);
}

.study-exam-header p,
.study-exam-header strong {
    display: block;
    margin: 0;
}

.study-exam-header p {
    max-width: 260px;
    overflow: hidden;
    color: var(--study-soft);
    font-size: 0.62rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.study-exam-header strong {
    margin-top: 2px;
    color: var(--study-ink);
    font-size: 0.73rem;
}

.study-progress-track {
    height: 7px;
    overflow: hidden;
    border-radius: 999px;
    background: var(--study-surface-soft);
}

.study-progress-track span {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--study-accent), color-mix(in srgb, var(--study-accent) 60%, #ffffff));
    transition: width 220ms ease;
}

.study-question-card {
    padding: clamp(25px, 5vw, 54px);
}

.study-question-number {
    color: var(--study-accent);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.study-app-page .study-question-card > h1 {
    max-width: 900px;
    margin: 10px 0 0;
    color: var(--study-ink);
    font-size: clamp(1.3rem, 2.6vw, 2rem);
    font-weight: 600;
    line-height: 1.45;
    letter-spacing: -0.025em;
}

.study-answer-list {
    display: grid;
    gap: 10px;
    margin-top: 28px;
}

.study-answer-list button {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr) 24px;
    align-items: center;
    gap: 12px;
    min-height: 58px;
    padding: 9px 14px;
    border: 1px solid var(--study-line);
    border-radius: 11px;
    background: var(--study-surface);
    color: var(--study-copy);
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.study-answer-list button:hover:not(:disabled),
.study-answer-list button.is-selected {
    border-color: color-mix(in srgb, var(--study-accent) 60%, var(--study-line));
    background: color-mix(in srgb, var(--study-accent-soft) 60%, var(--study-surface));
    transform: translateX(2px);
}

.study-answer-list button > span:first-child {
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    border-radius: 8px;
    background: var(--study-surface-soft);
    color: var(--study-ink);
    font-size: 0.72rem;
    font-weight: 700;
}

.study-answer-list button strong {
    color: var(--study-ink);
    font-size: 0.78rem;
    font-weight: 500;
    line-height: 1.5;
}

.study-answer-list button .study-answer-state {
    color: var(--study-soft);
    font-size: 21px;
}

.study-answer-list button.is-correct {
    border-color: #22a64f;
    background: color-mix(in srgb, #22a64f 9%, var(--study-surface));
}

.study-answer-list button.is-correct .study-answer-state {
    color: #22a64f;
}

.study-answer-list button.is-wrong {
    border-color: #ef4444;
    background: color-mix(in srgb, #ef4444 8%, var(--study-surface));
}

.study-answer-list button.is-wrong .study-answer-state {
    color: #ef4444;
}

.study-answer-feedback {
    margin-top: 18px;
    padding: 16px;
    border: 1px solid var(--study-line);
    border-radius: 11px;
    background: var(--study-surface-soft);
}

.study-answer-feedback > div {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--study-ink);
}

.study-answer-feedback.is-correct > div .material-symbols-outlined {
    color: #22a64f;
}

.study-answer-feedback.is-wrong > div .material-symbols-outlined {
    color: #f59e0b;
}

.study-answer-feedback strong {
    font-size: 0.8rem;
}

.study-answer-feedback p {
    margin: 8px 0 0;
    color: var(--study-copy);
    font-size: 0.77rem;
    line-height: 1.6;
}

.study-question-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid var(--study-line);
}

.study-question-actions p {
    margin: 0;
    color: var(--study-soft);
    font-size: 0.68rem;
}

.study-results-card {
    display: flex;
    min-height: 560px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 48px 25px;
    text-align: center;
}

.study-results-ring {
    display: grid;
    width: 128px;
    height: 128px;
    margin-bottom: 25px;
    place-items: center;
    align-content: center;
    border-radius: 50%;
    background: radial-gradient(circle, var(--study-surface) 57%, transparent 59%), conic-gradient(var(--study-accent) var(--result, 0deg), var(--study-line) 0);
}

.study-results-ring strong,
.study-results-ring span {
    display: block;
}

.study-results-ring strong {
    color: var(--study-ink);
    font-size: 1.7rem;
    line-height: 1;
}

.study-results-ring span {
    margin-top: 4px;
    color: var(--study-soft);
    font-size: 0.62rem;
    text-transform: uppercase;
}

.study-results-ring-green {
    background: var(--study-accent-soft);
    color: var(--study-accent);
}

.study-results-ring-green .material-symbols-outlined {
    font-size: 55px;
}

.study-app-page .study-results-card h1 {
    margin: 8px 0 0;
    color: var(--study-ink);
    font-size: clamp(1.8rem, 4vw, 2.7rem);
    font-weight: 700;
    letter-spacing: -0.04em;
}

.study-results-card > p:not(.study-section-kicker) {
    max-width: 570px;
    margin: 9px 0 0;
    color: var(--study-copy);
    font-size: 0.84rem;
}

.study-result-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 130px));
    gap: 10px;
    margin-top: 25px;
}

.study-result-stats article {
    padding: 13px 20px;
    border: 1px solid var(--study-line);
    border-radius: 10px;
    background: var(--study-surface-soft);
}

.study-result-stats strong,
.study-result-stats span {
    display: block;
}

.study-result-stats strong {
    color: var(--study-ink);
    font-size: 1.35rem;
}

.study-result-stats span {
    margin-top: 3px;
    color: var(--study-soft);
    font-size: 0.62rem;
}

.study-result-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 9px;
    margin-top: 25px;
}

/* Flashcard player */
.study-flashcard-shell {
    padding-bottom: 26px;
}

.study-flashcard {
    position: relative;
    width: min(760px, calc(100% - 44px));
    min-height: 420px;
    margin: 32px auto 0;
    outline: none;
    transform-style: preserve-3d;
    transition: transform 420ms cubic-bezier(0.2, 0.7, 0.2, 1);
    cursor: pointer;
}

.study-flashcard:focus-visible {
    border-radius: 18px;
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--study-accent) 24%, transparent);
}

.study-flashcard.is-flipped {
    transform: rotateY(180deg);
}

.study-flashcard-face {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: clamp(28px, 6vw, 62px);
    border: 1px solid color-mix(in srgb, var(--study-accent) 24%, var(--study-line));
    border-radius: 18px;
    background:
        radial-gradient(circle at 88% 8%, color-mix(in srgb, var(--study-accent) 9%, transparent), transparent 14rem),
        var(--study-surface);
    box-shadow: 0 23px 50px color-mix(in srgb, var(--study-accent) 10%, rgba(23, 32, 51, 0.08));
    backface-visibility: hidden;
    text-align: center;
}

.study-flashcard-back {
    transform: rotateY(180deg);
}

.study-flashcard-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--study-accent);
    font-size: 0.67rem;
    font-weight: 600;
    letter-spacing: 0.065em;
    text-transform: uppercase;
}

.study-flashcard-label .material-symbols-outlined {
    font-size: 18px;
}

.study-app-page .study-flashcard-face h1 {
    max-width: 620px;
    margin: 19px 0 0;
    color: var(--study-ink);
    font-size: clamp(1.45rem, 3.7vw, 2.65rem);
    font-weight: 600;
    line-height: 1.45;
    letter-spacing: -0.03em;
}

#deck-card-hint {
    margin: 15px 0 0;
    padding: 9px 12px;
    border-radius: 8px;
    background: var(--study-surface-soft);
    color: var(--study-copy);
    font-size: 0.75rem;
}

#deck-show-hint {
    min-height: 35px;
    margin-top: 16px;
}

.study-flip-prompt {
    position: absolute;
    bottom: 23px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--study-soft);
    font-size: 0.63rem;
}

.study-flip-prompt .material-symbols-outlined {
    font-size: 17px;
}

.study-tag-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin-top: 18px;
}

.study-tag-row span {
    padding: 5px 8px;
    border-radius: 999px;
    background: var(--study-accent-soft);
    color: var(--study-accent-deep);
    font-size: 0.61rem;
}

.study-reveal-action {
    display: flex;
    justify-content: center;
    margin-top: 25px;
}

.study-reveal-action .study-primary-action {
    min-width: 180px;
}

.study-rating-actions {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    width: min(700px, calc(100% - 44px));
    margin: 24px auto 0;
}

.study-rating-actions button {
    min-height: 58px;
    padding: 9px;
    border: 1px solid var(--study-line);
    border-radius: 10px;
    background: var(--study-surface);
    color: var(--study-copy);
    font-family: inherit;
    cursor: pointer;
}

.study-rating-actions button:hover {
    transform: translateY(-2px);
    border-color: var(--study-accent);
}

.study-rating-actions strong,
.study-rating-actions span {
    display: block;
}

.study-rating-actions strong {
    color: var(--study-ink);
    font-size: 0.75rem;
}

.study-rating-actions span {
    margin-top: 3px;
    color: var(--study-soft);
    font-size: 0.59rem;
}

.study-rating-actions button[data-rating="again"] { border-bottom: 3px solid #ef4444; }
.study-rating-actions button[data-rating="hard"] { border-bottom: 3px solid #f59e0b; }
.study-rating-actions button[data-rating="good"] { border-bottom: 3px solid #22a64f; }
.study-rating-actions button[data-rating="easy"] { border-bottom: 3px solid #3b82f6; }

/* AI catalog */
.study-planned-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 1px solid color-mix(in srgb, var(--study-accent) 28%, var(--study-line));
    border-radius: 999px;
    background: var(--study-accent-soft);
    color: var(--study-accent-deep);
    font-size: 0.72rem;
    font-weight: 600;
}

[data-theme="dark"] .study-planned-pill {
    background: color-mix(in srgb, var(--study-accent) 16%, transparent);
    color: color-mix(in srgb, var(--study-accent) 65%, #ffffff);
}

.study-planned-pill .material-symbols-outlined {
    font-size: 19px;
}

.study-ai-hero-panel {
    display: grid;
    grid-template-columns: 70px minmax(0, 1fr);
    gap: 20px;
    padding: 26px;
    border: 1px solid color-mix(in srgb, var(--study-accent) 24%, var(--study-line));
    border-radius: 18px;
    background:
        radial-gradient(circle at 95% 0, color-mix(in srgb, var(--study-accent) 16%, transparent), transparent 12rem),
        var(--study-surface);
    box-shadow: var(--study-shadow);
}

.study-ai-hero-panel > .material-symbols-outlined {
    display: grid;
    width: 66px;
    height: 66px;
    place-items: center;
    border-radius: 16px;
    background: linear-gradient(145deg, #ad7df0, var(--study-accent-deep));
    color: #ffffff;
    font-size: 35px;
}

.study-ai-hero-panel p {
    margin: 0;
    color: var(--study-accent);
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.07em;
}

.study-app-page .study-ai-hero-panel h2 {
    font-size: 1.35rem;
}

.study-ai-hero-panel ul {
    display: grid;
    gap: 5px;
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
}

.study-ai-hero-panel li {
    color: var(--study-copy);
    font-size: 0.72rem;
}

.study-ai-hero-panel li::before {
    content: "✓";
    margin-right: 7px;
    color: var(--study-accent);
    font-weight: 700;
}

.study-ai-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 15px;
}

.study-ai-card {
    display: flex;
    min-width: 0;
    min-height: 370px;
    flex-direction: column;
    padding: 20px;
    border: 1px solid var(--study-line);
    border-radius: 14px;
    background:
        radial-gradient(circle at 85% 0, color-mix(in srgb, var(--study-accent) 7%, transparent), transparent 10rem),
        var(--study-surface);
    box-shadow: 0 13px 35px rgba(23, 32, 51, 0.055);
}

.study-ai-card > div:first-child {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.study-ai-icon {
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    border-radius: 12px;
    background: linear-gradient(145deg, #aa79ed, var(--study-accent-deep));
    color: #ffffff;
}

.study-ai-icon .material-symbols-outlined {
    font-size: 26px;
}

.study-ai-status {
    padding: 4px 9px;
    border-radius: 999px;
    background: var(--study-accent-soft);
    color: var(--study-accent-deep);
    font-size: 0.6rem;
    font-weight: 600;
}

[data-theme="dark"] .study-ai-status {
    background: color-mix(in srgb, var(--study-accent) 16%, transparent);
    color: color-mix(in srgb, var(--study-accent) 65%, #ffffff);
}

.study-app-page .study-ai-card h3,
.study-app-page .study-guardrail-grid h3 {
    margin: 17px 0 0;
    color: var(--study-ink);
    font-size: 1rem;
    font-weight: 700;
}

.study-ai-card > p {
    margin: 8px 0 0;
    color: var(--study-copy);
    font-size: 0.73rem;
    line-height: 1.58;
}

.study-ai-card ul {
    display: grid;
    gap: 6px;
    margin: 16px 0;
    padding: 0;
    list-style: none;
}

.study-ai-card li {
    color: var(--study-copy);
    font-size: 0.68rem;
}

.study-ai-card li::before {
    content: "•";
    margin-right: 7px;
    color: var(--study-accent);
}

.study-ai-card button {
    display: inline-flex;
    min-height: 39px;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: auto;
    padding: 8px 10px;
    border: 1px solid var(--study-line);
    border-radius: 9px;
    background: var(--study-surface-soft);
    color: var(--study-soft);
    font-family: inherit;
    font-size: 0.66rem;
    cursor: not-allowed;
}

.study-ai-card button .material-symbols-outlined {
    font-size: 17px;
}

.study-ai-guardrails {
    padding-top: 54px;
}

.study-guardrail-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 15px;
}

.study-guardrail-grid article {
    padding: 22px;
    border: 1px solid var(--study-line);
    border-radius: 13px;
    background: var(--study-surface);
}

.study-guardrail-grid article > .material-symbols-outlined {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 11px;
    background: var(--study-accent-soft);
    color: var(--study-accent);
    font-size: 25px;
}

[data-theme="dark"] .study-guardrail-grid article > .material-symbols-outlined {
    background: color-mix(in srgb, var(--study-accent) 16%, transparent);
}

.study-guardrail-grid p {
    margin: 7px 0 0;
    color: var(--study-copy);
    font-size: 0.72rem;
    line-height: 1.58;
}

.study-ai-notice {
    display: flex;
    align-items: center;
    gap: 11px;
    margin-top: 15px;
    padding: 14px 17px;
    border: 1px solid color-mix(in srgb, var(--study-accent) 25%, var(--study-line));
    border-radius: 11px;
    background: color-mix(in srgb, var(--study-accent-soft) 44%, var(--study-surface));
}

.study-ai-notice .material-symbols-outlined {
    color: var(--study-accent);
}

.study-ai-notice p {
    margin: 0;
    color: var(--study-copy);
    font-size: 0.72rem;
}

.study-ai-notice strong {
    color: var(--study-ink);
}

.study-live-pill,
.study-ai-status-live {
    background: color-mix(in srgb, #25a953 14%, var(--study-surface));
    color: #16813a;
}

[data-theme="dark"] .study-live-pill,
[data-theme="dark"] .study-ai-status-live {
    background: rgba(53, 208, 111, 0.14);
    color: #75e49d;
}

.study-ai-workspace {
    margin-bottom: clamp(38px, 5vw, 64px);
    padding: clamp(20px, 3vw, 34px);
    scroll-margin-top: 110px;
    border: 1px solid color-mix(in srgb, var(--study-accent) 24%, var(--study-line));
    border-radius: 20px;
    background:
        radial-gradient(circle at 100% 0, color-mix(in srgb, var(--study-accent) 10%, transparent), transparent 24rem),
        var(--study-surface);
    box-shadow: var(--study-shadow);
}

.study-ai-workspace-heading {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.study-ai-workspace-heading > div {
    min-width: 0;
}

.study-app-page .study-ai-workspace-heading h2 {
    margin: 6px 0 4px;
    color: var(--study-ink);
    font-size: clamp(1.35rem, 2vw, 1.8rem);
    line-height: 1.2;
}

.study-ai-workspace-heading p {
    margin: 0;
    color: var(--study-copy);
    font-size: 0.78rem;
    line-height: 1.6;
}

.study-ai-workspace-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.88fr) minmax(360px, 1.12fr);
    gap: clamp(18px, 3vw, 32px);
    align-items: stretch;
}

.study-ai-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    align-content: start;
}

.study-ai-field {
    display: grid;
    gap: 7px;
    color: var(--study-ink);
    font-size: 0.72rem;
    font-weight: 600;
}

.study-ai-field > span {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
}

.study-ai-field > span small,
.study-ai-source-field > small {
    color: var(--study-soft);
    font-size: 0.61rem;
    font-weight: 500;
}

.study-ai-field input,
.study-ai-field select,
.study-ai-field textarea {
    width: 100%;
    min-width: 0;
    border: 1px solid var(--study-line);
    border-radius: 11px;
    outline: 0;
    background: var(--study-surface-soft);
    color: var(--study-ink);
    font: inherit;
    font-weight: 500;
    transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.study-ai-field input,
.study-ai-field select {
    min-height: 46px;
    padding: 10px 13px;
}

.study-ai-field textarea {
    min-height: 270px;
    padding: 14px;
    resize: vertical;
    font-family: "Poppins", "Cairo", sans-serif;
    font-size: 0.74rem;
    font-weight: 400;
    line-height: 1.65;
}

.study-ai-field input:focus,
.study-ai-field select:focus,
.study-ai-field textarea:focus {
    border-color: var(--study-accent);
    background: var(--study-surface);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--study-accent) 15%, transparent);
}

.study-ai-source-field,
.study-ai-privacy-note,
.study-ai-generate,
.study-ai-form-status {
    grid-column: 1 / -1;
}

.study-ai-source-field > small {
    text-align: right;
}

.study-ai-privacy-note {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    padding: 11px 13px;
    border: 1px solid color-mix(in srgb, var(--study-accent) 20%, var(--study-line));
    border-radius: 10px;
    background: color-mix(in srgb, var(--study-accent-soft) 40%, var(--study-surface));
}

.study-ai-privacy-note .material-symbols-outlined {
    flex: 0 0 auto;
    color: var(--study-accent);
    font-size: 19px;
}

.study-ai-privacy-note p {
    margin: 0;
    color: var(--study-copy);
    font-size: 0.63rem;
    line-height: 1.55;
}

.study-ai-generate {
    width: 100%;
    min-height: 47px;
    justify-content: center;
    border: 0;
    cursor: pointer;
}

.study-ai-form-status {
    min-height: 20px;
    margin: -3px 0 0;
    color: var(--study-copy);
    font-size: 0.66rem;
    line-height: 1.45;
}

.study-ai-form-status.is-error {
    color: #c0392b;
}

.study-ai-result {
    min-height: 520px;
    overflow: hidden;
    border: 1px solid var(--study-line);
    border-radius: 15px;
    background: var(--study-surface-soft);
}

.study-ai-result-empty {
    display: grid;
    min-height: 100%;
    place-content: center;
    justify-items: center;
    padding: 40px;
    text-align: center;
}

.study-ai-result-empty > .material-symbols-outlined {
    display: grid;
    width: 64px;
    height: 64px;
    margin-bottom: 14px;
    place-items: center;
    border-radius: 17px;
    background: var(--study-accent-soft);
    color: var(--study-accent);
    font-size: 31px;
}

.study-app-page .study-ai-result-empty h3 {
    margin: 0;
    color: var(--study-ink);
    font-size: 1rem;
}

.study-ai-result-empty p {
    max-width: 390px;
    margin: 9px 0 0;
    color: var(--study-copy);
    font-size: 0.7rem;
    line-height: 1.65;
}

.study-ai-result-content {
    max-height: 720px;
    overflow-y: auto;
    padding: clamp(18px, 3vw, 28px);
}

.study-ai-result-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--study-line);
}

.study-ai-result-header > div > span {
    color: var(--study-accent);
    font-size: 0.58rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.study-app-page .study-ai-result-header h2 {
    margin: 5px 0 0;
    color: var(--study-ink);
    font-size: clamp(1.2rem, 2vw, 1.55rem);
    line-height: 1.25;
}

.study-ai-copy {
    display: inline-flex;
    min-height: 38px;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    border: 1px solid var(--study-line);
    border-radius: 9px;
    background: var(--study-surface);
    color: var(--study-ink);
    font-family: inherit;
    font-size: 0.64rem;
    font-weight: 600;
    cursor: pointer;
}

.study-ai-copy .material-symbols-outlined {
    font-size: 17px;
}

.study-ai-overview,
.study-ai-result-section {
    margin-top: 20px;
}

.study-app-page .study-ai-overview h3,
.study-app-page .study-ai-result-section h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 9px;
    color: var(--study-ink);
    font-size: 0.82rem;
}

.study-ai-result-section h3 .material-symbols-outlined {
    color: var(--study-accent);
    font-size: 19px;
}

.study-ai-overview p,
.study-ai-result-section li {
    color: var(--study-copy);
    font-size: 0.71rem;
    line-height: 1.68;
}

.study-ai-overview p {
    margin: 0;
}

.study-ai-result-section ul {
    display: grid;
    gap: 8px;
    margin: 0;
    padding-left: 20px;
}

.study-ai-result-section li::marker {
    color: var(--study-accent);
}

.study-ai-result-disclaimer {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin: 24px 0 0;
    padding: 12px;
    border-radius: 9px;
    background: color-mix(in srgb, var(--study-accent-soft) 45%, var(--study-surface));
    color: var(--study-copy);
    font-size: 0.61rem;
    line-height: 1.5;
}

.study-ai-result-disclaimer .material-symbols-outlined {
    color: var(--study-accent);
    font-size: 18px;
}

.study-ai-card .study-ai-open-tool {
    border-color: var(--study-accent);
    background: var(--study-accent);
    color: #ffffff;
    font-weight: 600;
    cursor: pointer;
}

.study-ai-card .study-ai-open-tool:hover {
    background: var(--study-accent-deep);
}

@media (max-width: 980px) {
    .study-ai-workspace-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .study-ai-result {
        min-height: 360px;
    }
}

@media (max-width: 620px) {
    .study-ai-workspace {
        margin-right: -2px;
        margin-left: -2px;
        padding: 17px;
        border-radius: 16px;
    }

    .study-ai-workspace-heading {
        gap: 12px;
    }

    .study-ai-workspace-heading > .study-ai-icon {
        width: 43px;
        height: 43px;
        flex: 0 0 43px;
    }

    .study-ai-form {
        grid-template-columns: minmax(0, 1fr);
    }

    .study-ai-field,
    .study-ai-source-field,
    .study-ai-privacy-note,
    .study-ai-generate,
    .study-ai-form-status {
        grid-column: 1;
    }

    .study-ai-result {
        min-height: 320px;
    }

    .study-ai-result-empty {
        min-height: 320px;
        padding: 25px;
    }

    .study-ai-result-header {
        align-items: stretch;
        flex-direction: column;
    }

    .study-ai-copy {
        align-self: flex-start;
    }
}

/* Feedback */
.study-toast-region {
    position: fixed;
    z-index: 70000;
    right: 18px;
    bottom: 18px;
    display: grid;
    width: min(360px, calc(100vw - 36px));
    gap: 8px;
    pointer-events: none;
}

.study-toast {
    padding: 12px 14px;
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 10px;
    background: #172033;
    color: #f8fafc;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.22);
    font-size: 0.75rem;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 180ms ease, transform 180ms ease;
}

.study-toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.study-toast-success {
    border-color: rgba(34, 197, 94, 0.42);
}

.study-spin {
    animation: studySpin 0.85s linear infinite;
}

@keyframes studySpin {
    to { transform: rotate(360deg); }
}

@media (max-width: 1040px) {
    .study-content-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .study-ai-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .study-app-hero-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 30px;
    }

    .study-app-stat-panel {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .study-app-stat-panel article {
        grid-template-columns: 42px minmax(0, 1fr);
        min-height: 72px;
        padding: 10px;
    }

    .study-app-stat-panel article > .material-symbols-outlined {
        width: 40px;
        height: 40px;
    }

    .study-library-toolbar {
        grid-template-columns: minmax(0, 1fr) repeat(2, 170px);
    }

    .study-detail-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    .study-session-card {
        display: grid;
        grid-template-columns: 50px minmax(0, 1fr) auto;
        align-items: center;
        gap: 0 15px;
    }

    .study-session-card > .material-symbols-outlined {
        grid-row: 1 / span 2;
    }

    .study-session-card h2,
    .study-session-card > p {
        grid-column: 2;
    }

    .study-switch-row,
    .study-session-summary {
        grid-column: 1 / 3;
        margin-bottom: 0;
    }

    .study-session-card .study-primary-action,
    .study-session-card .study-secondary-action {
        grid-column: 3;
        grid-row: 1 / span 2;
        width: auto;
        min-width: 180px;
        margin: 0;
    }

    .study-session-card .study-secondary-action {
        grid-row: 3;
        margin-top: 10px;
    }

    .study-session-note {
        grid-column: 2 / 4;
        text-align: left;
    }
}

@media (max-width: 720px) {
    .study-app-page {
        padding-bottom: 40px;
    }

    .study-app-hero {
        padding-top: 24px;
        padding-bottom: 38px;
    }

    .study-back-link {
        margin-bottom: 22px;
    }

    .study-app-page .study-app-hero-copy h1 {
        font-size: clamp(2.45rem, 11vw, 3.35rem);
    }

    .study-app-stat-panel {
        grid-template-columns: minmax(0, 1fr);
    }

    .study-app-stat-panel article {
        grid-template-columns: 44px minmax(0, 1fr);
    }

    .study-library-section {
        padding-top: 40px;
    }

    .study-library-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .study-library-tabs {
        overflow-x: auto;
        padding-right: 8px;
        padding-left: 8px;
    }

    .study-library-tabs button {
        flex: 0 0 auto;
        padding-right: 10px;
        padding-left: 10px;
    }

    .study-library-toolbar {
        grid-template-columns: minmax(0, 1fr);
    }

    .study-filter-field {
        grid-template-columns: 62px minmax(0, 1fr);
    }

    .study-content-grid,
    .study-ai-grid,
    .study-guardrail-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .study-library-card {
        min-height: 345px;
    }

    .study-community-note {
        grid-template-columns: 52px minmax(0, 1fr);
    }

    .study-community-note > .material-symbols-outlined {
        width: 48px;
        height: 48px;
    }

    .study-community-note button {
        grid-column: 1 / -1;
        justify-content: center;
    }

    .study-modal {
        padding: 0;
    }

    .study-editor-dialog {
        width: 100vw;
        max-height: 100vh;
        min-height: 100vh;
        border: 0;
        border-radius: 0;
    }

    .study-editor-header,
    .study-editor-section,
    .study-editor-actions {
        padding-right: 16px;
        padding-left: 16px;
    }

    .study-form-grid,
    .study-option-editor {
        grid-template-columns: minmax(0, 1fr);
    }

    .study-field-wide {
        grid-column: auto;
    }

    .study-editor-section-heading-action {
        grid-template-columns: 34px minmax(0, 1fr);
    }

    .study-editor-section-heading-action > button {
        grid-column: 1 / -1;
        justify-content: center;
    }

    .study-editor-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .study-editor-actions > p {
        min-height: 0;
    }

    .study-editor-actions > div {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
    }

    .study-editor-actions > div > :last-child {
        grid-column: 1 / -1;
    }

    .study-player-page {
        padding-top: 23px;
    }

    .study-detail-main,
    .study-session-card {
        padding: 22px;
    }

    .study-session-card {
        display: flex;
        align-items: stretch;
    }

    .study-session-card > .material-symbols-outlined {
        align-self: flex-start;
    }

    .study-session-card .study-primary-action,
    .study-session-card .study-secondary-action {
        width: 100%;
        min-width: 0;
        margin-top: 14px;
    }

    .study-session-card .study-secondary-action {
        margin-top: 8px;
    }

    .study-session-note {
        text-align: center;
    }

    .study-exam-header {
        grid-template-columns: minmax(120px, 1fr) 38px;
        gap: 12px;
    }

    .study-progress-track {
        grid-column: 1 / -1;
        grid-row: 2;
    }

    .study-exam-header .study-icon-button {
        grid-column: 2;
        grid-row: 1;
    }

    .study-question-card {
        padding: 24px 17px;
    }

    .study-answer-list button {
        grid-template-columns: 35px minmax(0, 1fr) 22px;
        padding-right: 10px;
        padding-left: 10px;
    }

    .study-question-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .study-question-actions .study-primary-action {
        width: 100%;
    }

    .study-result-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        width: 100%;
    }

    .study-result-stats article {
        padding: 11px 8px;
    }

    .study-flashcard {
        width: calc(100% - 28px);
        min-height: 390px;
        margin-top: 20px;
    }

    .study-flashcard-face {
        padding: 30px 20px 55px;
    }

    .study-rating-actions {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: calc(100% - 28px);
    }

    .study-ai-hero-panel {
        grid-template-columns: 56px minmax(0, 1fr);
        padding: 20px;
    }

    .study-ai-hero-panel > .material-symbols-outlined {
        width: 54px;
        height: 54px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .study-flashcard,
    .study-library-card,
    .study-primary-action,
    .study-secondary-action,
    .study-progress-track span,
    .study-toast {
        transition: none;
    }
}

/* Question-bank library rhythm and resilient callouts. */
.study-qbank-page .study-library-section {
    padding-top: clamp(72px, 7vw, 104px);
}

.study-qbank-page .study-library-heading {
    align-items: center;
    gap: 28px;
    margin-bottom: 30px;
}

.study-qbank-page .study-library-heading > div:first-child {
    min-width: 0;
}

.study-qbank-page .study-library-heading .study-section-kicker {
    margin-bottom: 10px;
}

.study-qbank-page .study-library-panel {
    overflow: clip;
}

.study-qbank-page .study-community-note {
    min-height: 124px;
    margin-top: clamp(56px, 6vw, 88px);
    margin-bottom: clamp(64px, 7vw, 104px);
    padding: 24px 28px;
}

@media (max-width: 720px) {
    .study-qbank-page .study-library-section {
        padding-top: 58px;
    }

    .study-qbank-page .study-library-heading {
        align-items: stretch;
        margin-bottom: 24px;
    }

    .study-qbank-page .study-community-note {
        grid-template-columns: 48px minmax(0, 1fr);
        gap: 16px;
        min-height: 0;
        margin-top: 48px;
        margin-bottom: 66px;
        padding: 22px 20px;
    }

    .study-qbank-page .study-community-note > .material-symbols-outlined {
        width: 46px;
        height: 46px;
    }

    .study-qbank-page .study-community-note button {
        grid-column: 1 / -1;
        justify-content: center;
        min-height: 44px;
    }
}

@media (max-width: 430px) {
    .study-qbank-page .study-community-note {
        grid-template-columns: 1fr;
    }
}
.ai-launcher-library{padding-top:clamp(64px,8vw,96px)!important}.ai-launcher-library .study-library-heading{margin-bottom:28px!important}.ai-launcher-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.ai-launch-card{min-height:350px;color:inherit;text-decoration:none;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}.ai-launch-card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--study-accent) 48%,var(--study-line));box-shadow:0 20px 52px rgba(23,32,51,.12)}.ai-card-open{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:16px;border-top:1px solid var(--study-line);color:var(--study-accent);font-size:.72rem;font-weight:700}.ai-card-open .material-symbols-outlined{font-size:19px}.ai-safety-section{padding-top:clamp(72px,9vw,110px)!important;padding-bottom:clamp(72px,9vw,110px)!important}.ai-safety-section .study-library-heading{margin-bottom:24px!important}@media(max-width:720px){.ai-launcher-grid{grid-template-columns:1fr}.ai-launch-card{min-height:320px}}