/* Viewport-sized application shell. Overflow belongs to reachable content regions,
   never to a clipped document. Loaded after page-specific styles. */
html { height: 100%; overflow: hidden; }
body { height: 100vh; height: 100dvh; min-height: 0; overflow: hidden; display: flex; flex-direction: column; }
.os-menubar { flex: 0 0 28px; height: 28px; }
.app-window, .layout-page .app-window { flex: 1 1 0; min-height: 0; margin-bottom: 12px; grid-template-rows: minmax(0, 1fr); }
.app-sidebar, .window-body { min-height: 0; overflow: hidden; }
.sidebar-heading { flex-shrink: 0; height: 40px; }
.workspace-brand { flex-shrink: 0; margin: 8px 12px 4px; }
.sidebar-nav { flex: 1 1 0; min-height: 0; overflow: auto; }
.sidebar-account { flex-shrink: 0; margin-top: 0; padding-top: 9px; }
.window-toolbar { min-height: 40px; padding: 4px 20px; }
.window-footer { padding: 5px 0; margin: 0 20px; }
.main-content, .layout-page .main-content { min-height: 0; overflow: auto; padding: 16px 24px; scrollbar-gutter: stable; scroll-padding: 16px; }
.main-content:focus { outline-offset: -3px; }
:where(.main-content, .sidebar-nav, .layout-settings, .inspector-scroll, .preview-scroll, .confirm-dialog) { overscroll-behavior: contain; scrollbar-width: thin; }

/* Compact the surrounding interface, not manuscript typography or uploaded images. */
.breadcrumb { margin-bottom: 10px; }
.main-content > .section-heading { padding: 0 0 14px; }
.section-heading h1 { margin-bottom: 8px; font-size: 28px; }
.section-heading p { margin-top: 6px; margin-bottom: 0; }
.eyebrow { margin-bottom: 6px; }
.hero-panel { min-height: 0; padding: 18px 22px; margin: 0 0 14px; }
.hero-panel h1 { font-size: 30px; margin-bottom: 8px; }
.hero-copy { margin: 8px 0; font-size: 14px; }
.hero-actions { margin-top: 12px; }
.workspace-art { transform: scale(.65) rotate(-6deg); transform-origin: right bottom; }
.department-card, .tool-card { min-height: 0; padding: 16px; }
.department-card h2, .tool-card h2 { margin: 10px 0 8px; font-size: 20px; }
.department-card .card-kicker { margin-top: 8px; }
.department-card p, .tool-card p { margin: 6px 0; line-height: 1.55; }
.department-card .app-icon, .tool-card .app-icon { width: 30px; height: 30px; margin-bottom: 6px; }
.card-action { padding-top: 12px; }
.media-tool-grid { margin-bottom: 18px; }
.home-shortcuts { margin-top: 12px; gap: 10px; }
.shortcut-card { min-height: 48px; padding: 8px 12px; }
.management-nav { margin-bottom: 12px; }
.form-panel { padding: 18px 22px; }
.form-panel h1 { font-size: 27px; margin-bottom: 12px; }
.panel-intro { margin: 6px 0 12px; }
.stack-form { gap: 12px; }
.form-field { gap: 5px; }
.form-field input:not([type="file"]), .form-field select { min-height: 38px; padding: 6px 10px; }
.form-field input[type="file"] { padding: 8px; }
.form-footer { margin: 12px 0 0; }
.action-row { margin-top: 16px; }
.dropzone { padding: 16px; gap: 6px; }
.dropzone-icon { width: 30px; height: 30px; font-size: 24px; }
.dropzone h2 { font-size: 19px; }
.dropzone-files { max-height: 72px; overflow: auto; }
.upload-box { padding: 12px; gap: 12px; }
.summary-strip { margin: 10px 0; padding: 10px 0; }
.date-options { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.date-option { min-height: 64px; padding: 8px 10px; }
.filter-bar { margin-bottom: 14px; gap: 10px; padding: 12px; }
.activity-create-panel { margin-bottom: 16px; }
.activity-create-panel h2 { margin-bottom: 12px; }
.activity-card { padding: 16px; }
.activity-card h2 { margin: 10px 0; }
.tutorial-shell, .tutorial-sidebar { min-height: 0; }
.tutorial-main { padding: 18px; }
.empty-panel { padding: 24px; }
@media (min-width: 1000px) {
    #submission-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    #submission-form > :not(.form-field) { grid-column: 1 / -1; }
    #submission-form .upload-box { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* The editor fills remaining height; each column owns its own scroll. */
.layout-page .main-content { display: flex; flex-direction: column; overflow: hidden; gap: 8px; padding: 12px; }
.layout-page .main-content > #layout-workspace { min-height: 0; }
.layout-page .main-content > :not(.layout-workspace) { flex-shrink: 0; }
.layout-page .breadcrumb { margin: 0; }
.editor-heading { margin: 0; gap: 10px; }
.editor-heading > div:first-child { min-width: 0; }
.editor-heading-actions { display: flex; flex-shrink: 0; align-items: center; gap: 10px; }
.editor-heading h1 { font-size: 19px; line-height: 1.35; margin: 0; max-height: 2.7em; overflow: auto; }
.editor-heading .eyebrow { display: none; }
.editor-heading p:not(.eyebrow) { font-size: 11px; margin-top: 3px; }
.layout-page .main-content > .message { margin: 0; padding: 8px 12px; max-height: 64px; overflow: auto; }
.editor-panel-tabs { display: none; }
.layout-workspace { flex: 1 1 0; min-height: 0; grid-template-columns: minmax(185px, .75fr) minmax(300px, 1.6fr) minmax(210px, .85fr); grid-template-rows: minmax(0, 1fr); }
.layout-settings { min-height: 0; overflow: auto; padding: 12px; gap: 12px; }
.layout-settings > * { flex-shrink: 0; }
.layout-canvas { min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.layout-canvas > :not(.preview-scroll) { flex-shrink: 0; }
.preview-scroll { flex: 1 1 0; min-height: 0; max-height: none; padding: 16px 10px; }
.layout-inspector { min-height: 0; display: flex; flex-direction: column; padding: 0; gap: 0; overflow: hidden; grid-column: auto; }
.inspector-scroll { flex: 1 1 0; min-height: 0; overflow: auto; padding: 12px; display: flex; flex-direction: column; gap: 12px; }
.inspector-scroll > * { flex-shrink: 0; }
.layout-inspector .image-tray { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.layout-inspector .model-control { flex-shrink: 0; margin: 0; padding: 10px 12px; gap: 8px; max-height: 45%; overflow: auto; background: #f5f8ff; }
.model-control .form-field small { font-size: 10px; }
.editor-toolbar { padding: 8px 10px; gap: 6px; }
.editor-export { gap: 6px; }
.export-note { font-size: 10px; padding: 5px 10px 8px; max-height: 48px; overflow: auto; }
.editor-status { position: static; margin: 0; padding: 6px 10px; font-size: 12px; max-height: 50px; overflow: auto; }
.confirm-dialog { max-height: calc(100vh - 24px); max-height: calc(100dvh - 24px); overscroll-behavior: contain; }
.confirm-dialog .action-row { position: sticky; bottom: -23px; padding: 10px 0; background: var(--surface); z-index: 1; }

@media (max-width: 1150px) {
    .layout-page .app-window { grid-template-columns: 170px minmax(0, 1fr); }
    .layout-page .editor-heading { flex-direction: row; align-items: center; }
    .editor-panel-tabs { display: flex; gap: 6px; }
    .editor-panel-tabs button { flex: 1; min-width: 0; min-height: 34px; font-size: 12px; }
    .editor-panel-tabs button[aria-selected="true"] { color: #fff; background: var(--accent); }
    .layout-workspace { grid-template-columns: minmax(0, 1fr); }
    .layout-settings, .layout-inspector { border: 0; }
    .layout-workspace[data-active-pane="preview"] > :not(.layout-canvas):not(input),
    .layout-workspace[data-active-pane="settings"] > :not(.layout-settings):not(input),
    .layout-workspace[data-active-pane="content"] > :not(.layout-inspector):not(input) { display: none; }
    .layout-workspace[data-active-pane="settings"] > .layout-settings,
    .layout-workspace[data-active-pane="preview"] > .layout-canvas,
    .layout-workspace[data-active-pane="content"] > .layout-inspector { display: flex; }
}
@media (max-width: 900px) and (min-width: 681px) {
    .department-grid, .multimedia-home-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .home-shortcuts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
    .os-menubar { flex-basis: 24px; height: 24px; }
    .app-window, .layout-page .app-window { display: flex; flex-direction: column; width: calc(100% - 10px); margin-bottom: 5px; border-radius: 12px; }
    .app-sidebar { flex-shrink: 0; display: grid; grid-template-columns: minmax(0, 1fr) auto; }
    .sidebar-heading { display: none; }
    .workspace-brand { grid-row: 1; margin: 2px 6px; padding: 4px; }
    .workspace-brand small { display: none; }
    .workspace-logo { width: 27px; height: 27px; }
    .sidebar-account { grid-row: 1; margin: 0 8px; padding: 0; }
    .sidebar-nav { grid-row: 2; flex: none; padding: 0 5px 4px; }
    .sidebar-link { min-height: 32px; }
    .window-body { flex: 1 1 0; }
    .window-toolbar { min-height: 34px; padding: 3px 12px; }
    .window-footer { padding: 3px 0; margin: 0 12px; font-size: 10px; }
    .main-content, .layout-page .main-content { padding: 12px; }
    .layout-page .main-content { padding: 8px; gap: 6px; }
    .hero-panel { padding: 14px; margin-bottom: 12px; }
    .hero-panel h1 { font-size: 25px; }
    .department-card, .tool-card { padding: 12px; }
    .department-card .app-icon { float: left; margin: 0 10px 0 0; }
    .department-card .card-kicker { margin: 0; }
    .department-card h2 { font-size: 18px; margin: 6px 0; }
    .card-action { padding-top: 5px; }
    .form-panel { padding: 16px; }
    .date-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .editor-heading h1 { font-size: 16px; }
    .editor-heading .count-badge { font-size: 10px; padding: 3px 6px; }
    .editor-heading-actions { flex-direction: column; align-items: flex-end; gap: 3px; }
    .layout-page .breadcrumb { overflow-x: auto; white-space: nowrap; flex-wrap: nowrap; font-size: 10px; }
    .layout-page .breadcrumb > * { flex-shrink: 0; }
    .editor-toolbar { padding: 6px; }
    .preview-scroll { padding: 10px 6px; }
    .export-note { max-height: 35px; }
    .layout-inspector .model-control { max-height: 48%; }
}
@media (max-height: 600px) {
    .window-footer { display: none; }
    .editor-heading p:not(.eyebrow) { display: none; }
    .layout-page .main-content { gap: 4px; padding-top: 6px; padding-bottom: 6px; }
    .editor-status { max-height: 34px; padding: 3px 8px; }
    .export-note { display: none; }
}
/* Print all content, not only the visible pane. */
@media print {
    html, body { height: auto; overflow: visible; display: block; }
    .app-window, .layout-page .app-window, .window-body, .main-content, .layout-page .main-content, .layout-workspace, .layout-canvas, .preview-scroll { display: block; height: auto; min-height: 0; max-height: none; overflow: visible; }
    .app-sidebar, .os-menubar, .window-toolbar, .window-footer, .editor-panel-tabs, .layout-settings, .layout-inspector, .editor-toolbar, .editor-status { display: none !important; }
    .layout-workspace > .layout-canvas { display: block !important; }
}