.library-shell { max-width: 1400px; margin: 2rem auto; padding: 0 1.25rem; font-family: system-ui, sans-serif; color: var(--color_text); }
.library-shell * { box-sizing: border-box; }
.library-shell a { color: var(--color_primary); }
.library-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin: 1.5rem 0; }
.library-heading h1 { margin: .25rem 0; font-size: clamp(1.7rem, 4vw, 2.5rem); }
.eyebrow { letter-spacing: .08em; font-size: .78rem; font-weight: 700; color: var(--color_muted); }
.action { display: inline-block; border: 1px solid var(--color_primary); background: var(--color_primary); color: var(--color_on_primary) !important; border-radius: .5rem; padding: .7rem 1rem; text-decoration: none; cursor: pointer; font: inherit; }
.secondary { background: var(--color_surface); color: var(--color_primary) !important; }
.pack-access { padding: 1rem; background: var(--color_soft); border-radius: .6rem; }
.pack-access summary { cursor: pointer; font-weight: 600; }
.library-filters { display: flex; align-items: end; gap: .8rem; flex-wrap: wrap; margin: 1.5rem 0 2rem; }
.library-filters label { display: grid; gap: .4rem; flex: 1 1 150px; font-size: .9rem; }
.library-filters input, .library-filters select, .reader-tools select { padding: .65rem; border: 1px solid var(--color_border); border-radius: .4rem; min-width: 0; font: inherit; background: var(--color_surface); }
.subject-section { margin: 2rem 0; }
.muted { color: var(--color_muted); font-size: .9rem; font-weight: normal; }
.resource-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.resource-card { border: 1px solid var(--color_border); border-radius: .75rem; padding: 1.2rem; text-decoration: none; display: flex; flex-direction: column; background: var(--color_surface); }
.resource-card:hover { border-color: var(--color_primary); background: var(--color_soft); }
.resource-card h3 { color: var(--color_text); margin: .75rem 0; }
.resource-card p { color: var(--color_muted); flex: 1; margin-top: 0; }
.format-tag { color: var(--color_primary); font-size: .8rem; font-weight: 700; }
.card-footer { display: flex; justify-content: space-between; gap: .5rem; border-top: 1px solid var(--color_border); padding-top: .8rem; font-size: .85rem; }
.reader-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 1.5rem; }
.reader-main { min-width: 0; }
.document-reader { display: block; width: 100%; height: 72vh; border: 1px solid var(--color_border); border-radius: .5rem; background: var(--color_soft); }
#resource-video { width: 100%; max-height: 72vh; background: var(--color_reader); border-radius: .5rem; }
.reader-tools, .reader-pagination { display: flex; gap: 1rem; justify-content: space-between; flex-wrap: wrap; margin: 1rem 0; align-items: center; }
.reader-tools { font-size: .9rem; }
.reader-pagination { padding: 1rem 0; border-top: 1px solid var(--color_border); }
.course-sidebar { padding: 1rem; background: var(--color_soft); border-radius: .6rem; align-self: start; }
.course-sidebar h2 { font-size: 1.1rem; margin-top: 0; }
.course-sidebar ol { list-style: none; padding: 0; margin: 0; }
.course-sidebar a { display: block; padding: .85rem; text-decoration: none; border-radius: .4rem; }
.course-sidebar a[aria-current] { background: var(--color_soft); font-weight: 600; }
.course-sidebar span { display: block; font-size: .75rem; color: var(--color_muted); margin-bottom: .3rem; }
.empty-state { text-align: center; background: var(--color_soft); border-radius: .6rem; padding: 3rem 1rem; }
.library-shell :focus-visible { outline: 3px solid var(--color_primary); outline-offset: 3px; }
.media-reader { background: var(--color_soft); border: 1px solid var(--color_border); border-radius: .6rem; overflow: hidden; }
.media-reader .reader-tools { padding: .65rem; margin: 0; flex-wrap: wrap; gap: .65rem; }
.media-reader button, .media-reader select, .media-reader input { font: inherit; padding: .45rem; }
.media-reader button { cursor: pointer; }
.media-reader button:disabled { cursor: default; opacity: .5; }
#pdf-page { width: 4.5rem; }
#pdf-pages { overflow: scroll; scrollbar-gutter: stable; scrollbar-color: var(--color_secondary) var(--color_reader); height: 65vh; background: var(--color_reader); padding: 12px; box-sizing: border-box; }
#pdf-canvas { display: block; margin: auto; background: var(--color_surface); }
.media-reader:fullscreen, .media-reader.expanded-reader { width: 100%; height: 100%; border: 0; border-radius: 0; display: flex; flex-direction: column; }
.media-reader.expanded-reader { position: fixed; inset: 0; z-index: 10000; }
.media-reader:fullscreen #pdf-reader, .media-reader.expanded-reader #pdf-reader { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.media-reader:fullscreen #pdf-pages, .media-reader.expanded-reader #pdf-pages { flex: 1; height: auto; min-height: 0; }
.media-reader:fullscreen video, .media-reader.expanded-reader video { flex: 1; min-height: 0; width: 100%; height: 0; object-fit: contain; background: var(--color_reader); }
@media (max-width: 800px) { .reader-layout { grid-template-columns: 1fr; } .document-reader { height: 65vh; } .library-shell { padding: 0 .75rem; } }
.library-shell { margin: 0 auto; padding: 0; }
.resource-grid { grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.resource-card { box-shadow: var(--shadow); padding: 1.5rem; }
.library-filters { padding: 1.2rem; background: var(--color_surface); border: 1px solid var(--color_border); border-radius: .8rem; }
#reader-fullscreen { padding: .65rem 1rem; font-weight: 700; margin-left: auto; }
#reader-fullscreen::before { content: '⛶'; font-size: 1.4rem; line-height: 1; margin-right: .5rem; }
.library-shell .action, .library-filters, .resource-card, .pack-access, .course-sidebar, .media-reader, .empty-state { border-radius: 0; }
.resource-card, .library-filters, .pack-access, .course-sidebar, .empty-state {
    border-top: 3px solid var(--color_primary);
    box-shadow: var(--shadow);
}
.library-shell .action:focus-visible { outline: 3px solid currentColor; outline-offset: -5px; }
.media-reader button { padding-inline: 1rem; }
.media-reader button:focus-visible { outline: 3px solid currentColor; outline-offset: -5px; }
.library-shell .action, .media-reader button { padding-inline: calc(.75rem + var(--corner_cut)); }
#pdf-pages { scrollbar-color: var(--color_border) var(--color_reader); }
#reader-fullscreen::before { content: ''; margin: 0; }
.resource-card, .reader-tools > *, .reader-pagination > *, .course-sidebar { min-width: 0; overflow-wrap: anywhere; }
.media-reader.expanded-reader { height: 100dvh; }
@media (max-width: 600px) {
    .library-shell { padding: 0; }
    .library-heading { margin-top: .5rem; }
    .library-heading > .action { width: 100%; }
    .library-filters { display: grid; grid-template-columns: minmax(0, 1fr); padding: 1rem; gap: .75rem; }
    .library-filters input, .library-filters select, .media-reader select, .media-reader input { font-size: 16px; min-height: 44px; }
    .resource-grid { grid-template-columns: minmax(0, 1fr); }
    .resource-card { padding: 1.1rem; }
    .reader-layout { gap: 1rem; }
    .media-reader .reader-tools { gap: .5rem; }
    #pdf-previous, #pdf-next { padding-inline: .9rem; font-size: .85rem; }
    #reader-fullscreen { min-height: 48px; }
    #reader-status, #save-status { flex-basis: 100%; }
    #pdf-pages { height: 55vh; height: 55dvh; }
    .reader-pagination { flex-direction: column; align-items: stretch; }
    .reader-pagination a { display: block; padding: .65rem 0; }
    .pack-access ul { padding-left: 1.2rem; }
    .empty-state { padding: 1.5rem 1rem; }
}
@media (max-height: 500px) and (orientation: landscape) {
    .media-reader:fullscreen > .reader-tools, .media-reader.expanded-reader > .reader-tools { padding-block: .25rem; }
    .media-reader:fullscreen #reader-status, .media-reader.expanded-reader #reader-status { display: none; }
}
.library-filters input, .library-filters select, .reader-tools select { border-radius: 0; }

.design-site #pdf-pages.capture-masked { background: #fff; }
#pdf-pages.capture-masked canvas { visibility: hidden; }

/* Défilement continu et barre compacte commune au zoom et au plein écran. */
#pdf-pages canvas { display: block; margin: 0 auto 12px; background: #fff; }
.design-site .media-reader > .reader-tools { justify-content: flex-start; padding: .35rem .6rem; gap: .5rem; }
.design-site .media-reader > .reader-tools button,
.design-site .media-reader > .reader-tools select { min-height: 36px; height: 36px; padding: .25rem .7rem; font-size: .85rem; width: auto; }
#reader-status:empty { display: none; }

/* QCM : contrôles natifs accessibles, correction indépendante de la couleur. */
.quiz-panel { padding: clamp(1rem, 3vw, 2rem); background: var(--brand-soft, #f5f7f5); border: 1px solid var(--brand-border, #d7dfd9); border-radius: 12px; }
.quiz-panel progress { width: 100%; height: 12px; accent-color: var(--brand-green, #1b452f); margin-bottom: 1.5rem; }
.quiz-panel fieldset { border: 0; padding: 0; min-width: 0; }
.quiz-panel legend { font-size: 1.25rem; font-weight: 650; line-height: 1.5; white-space: pre-wrap; overflow-wrap: anywhere; }
#quiz-options { display: grid; gap: .75rem; margin: 1.25rem 0; }
#quiz-options label { display: flex; align-items: center; gap: .8rem; padding: 1rem; min-height: 44px; box-sizing: border-box; background: white; color: #202d25; border: 1px solid var(--brand-border, #d7dfd9); border-radius: 6px; cursor: pointer; overflow-wrap: anywhere; }
#quiz-options input { flex: 0 0 auto; width: 20px; height: 20px; accent-color: var(--brand-green, #1b452f); }
#quiz-options label:has(input:checked) { outline: 2px solid var(--brand-green, #1b452f); }
#quiz-options label:focus-within { outline: 3px solid var(--brand-green, #1b452f); outline-offset: 3px; }
#quiz-feedback { padding: 1rem; margin: 1rem 0; background: white; color: #202d25; border-left: 4px solid var(--brand-green, #1b452f); overflow-wrap: anywhere; }
.quiz-explanation { white-space: pre-wrap; }
.quiz-panel [hidden] { display: none !important; }