.office-intro,.office-help p { color:var(--text-secondary); line-height:1.7; }
.office-intro { margin-bottom:1rem; }
#office-viewer { min-width:0; }
#office-viewer [hidden] { display:none !important; }
.office-sr-only { position:absolute; width:1px; height:1px; padding:0; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; }
.office-document-open .office-intro { display:none; }

/* App shell: the workspace is the container, the shell is the grid inside it. */
.office-workspace { container:office / inline-size; position:relative; min-width:0; background:var(--bg-secondary); border:1px solid var(--border-primary); border-radius:.75rem; overflow:hidden; scroll-margin-top:4rem; }
.office-workspace[data-state="opening"],.office-workspace[data-state="ready"] { height:calc(100dvh - 4.75rem); min-height:26rem; }
.office-shell { display:grid; height:100%; grid-template:"bar" auto "find" auto "alert" auto "body" minmax(0,1fr) "status" auto / minmax(0,1fr); }
.office-workspace:is([data-state="empty"],[data-state="loading"]) :is(.office-appbar,.office-statusbar) { display:none; }
.office-appbar { grid-area:bar; display:grid; grid-template-columns:minmax(0,1fr) auto minmax(0,1fr); align-items:center; gap:.75rem; padding:.4rem .6rem; border-bottom:1px solid var(--border-primary); }
.office-appbar-start,.office-appbar-center,.office-appbar-end,.office-controls { display:flex; align-items:center; min-width:0; }
.office-appbar-start { gap:.5rem; }
.office-appbar-center { gap:.6rem; }
.office-appbar-end { position:relative; gap:.15rem; justify-content:flex-end; }
.office-controls { gap:.25rem; }
.office-divider { width:1px; height:1.5rem; background:var(--border-primary); }
.office-findbar { grid-area:find; display:flex; align-items:center; gap:.35rem; padding:.4rem .6rem; border-bottom:1px solid var(--border-primary); background:var(--bg-tertiary); }
.office-alert { grid-area:alert; margin:.6rem .75rem 0; }
.office-body { grid-area:body; position:relative; display:flex; min-width:0; min-height:0; }
.office-statusbar { grid-area:status; display:flex; align-items:center; gap:.75rem; min-height:2rem; padding:.2rem .75rem; border-top:1px solid var(--border-primary); color:var(--text-secondary); font-size:.78rem; }

/* Toolbar controls */
.office-icon-btn { display:inline-grid; place-items:center; flex:none; width:2.25rem; height:2.25rem; padding:0; color:var(--text-secondary); background:transparent; border:1px solid transparent; border-radius:.45rem; font-size:.92rem; cursor:pointer; transition:color .15s ease,background-color .15s ease; }
.office-icon-btn svg { width:1.05rem; height:1.05rem; }
.office-icon-btn:hover:not(:disabled) { color:var(--text-primary); background:var(--bg-tertiary); }
.office-icon-btn:disabled { opacity:.4; cursor:default; }
.office-icon-btn:is([aria-pressed="true"],[aria-expanded="true"]) { color:var(--accent-primary); background:color-mix(in srgb,var(--accent-primary) 12%,transparent); }
.office-file-icon { display:inline-grid; place-items:center; flex:none; width:2rem; height:2rem; border-radius:.45rem; color:#fff; background:var(--text-muted); font-size:.9rem; }
.office-workspace[data-format="docx"] .office-file-icon { background:#2f6fb7; }
.office-workspace[data-format="xlsx"] .office-file-icon { background:#1f8a4c; }
.office-workspace[data-format="pptx"] .office-file-icon { background:#c4531c; }
.office-filemeta { display:flex; flex-direction:column; min-width:0; line-height:1.3; }
.office-filemeta>strong { font-size:.9rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.office-format { color:var(--text-secondary); font-size:.72rem; white-space:nowrap; }
.office-shell .input { width:auto; margin:0; min-height:2.25rem; padding:.3rem .45rem; font-size:.82rem; }
#office-page { width:3.4rem; text-align:center; -moz-appearance:textfield; appearance:textfield; }
#office-page::-webkit-inner-spin-button,#office-page::-webkit-outer-spin-button { -webkit-appearance:none; margin:0; }
.office-page-total { min-width:2.25rem; color:var(--text-secondary); font-size:.82rem; white-space:nowrap; }
#office-scale { width:5.4rem; text-align:center; }
#office-query { flex:1 1 12rem; min-width:0; max-width:30rem; }
.office-findbar-icon { margin-inline:.3rem .15rem; color:var(--text-muted); font-size:.85rem; }
#office-results { color:var(--text-secondary); font-size:.8rem; white-space:nowrap; }
#office-results:empty { display:none; }
.office-findbar .btn { min-height:2.25rem; }
#office-position { white-space:nowrap; }
#office-export-status { margin-inline-start:auto; }
#office-progress { width:8rem; max-width:30%; accent-color:var(--accent-primary); }
.office-statusbar .btn { min-height:1.6rem; padding:.15rem .6rem; font-size:.75rem; }
.office-shell :focus-visible,.office-help summary:focus-visible { outline:2px solid var(--accent-primary); outline-offset:2px; }

/* Menus: Popover API panels, or plain panels where it is unavailable. */
.office-menu { position:fixed; inset:auto; margin:0; min-width:15rem; max-width:calc(100vw - 1rem); padding:.35rem; color:var(--text-primary); background:var(--bg-secondary); border:1px solid var(--border-primary); border-radius:.6rem; box-shadow:0 14px 36px var(--shadow-color); }
.office-menu.office-menu-fallback { position:absolute; top:calc(100% + .4rem); right:0; z-index:30; }
.office-menu-item { display:flex; align-items:center; gap:.7rem; width:100%; min-height:2.75rem; padding:.55rem .75rem; color:inherit; background:transparent; border:0; border-radius:.4rem; font:inherit; font-size:.875rem; text-align:start; cursor:pointer; }
.office-menu-item>i { width:1rem; color:var(--text-secondary); text-align:center; }
.office-menu-item:hover:not(:disabled) { background:var(--bg-tertiary); }
.office-menu-item:disabled { opacity:.45; cursor:default; }

/* Thumbnails */
.office-sidebar { flex:0 0 11rem; padding:.75rem .5rem; overflow-y:auto; overscroll-behavior:contain; background:var(--bg-secondary); border-inline-end:1px solid var(--border-primary); }
.office-thumbs { --office-thumb-ratio:1 / 1.294; display:flex; flex-direction:column; gap:.5rem; margin:0; padding:0; list-style:none; }
.office-workspace[data-format="pptx"] .office-thumbs { --office-thumb-ratio:16 / 9; }
.office-thumb { display:flex; flex-direction:column; align-items:center; gap:.35rem; width:100%; padding:.45rem .5rem; color:var(--text-secondary); background:transparent; border:0; border-radius:.5rem; font:inherit; font-size:.75rem; cursor:pointer; }
.office-thumb:hover { background:var(--bg-tertiary); }
.office-thumb-frame { display:block; width:100%; aspect-ratio:var(--office-thumb-ratio); overflow:hidden; background:#fff; border-radius:.2rem; box-shadow:0 1px 3px rgba(0,0,0,.2); outline:2px solid transparent; outline-offset:2px; }
.office-thumb-frame img { display:block; width:100%; height:100%; object-fit:contain; }
.office-thumb[aria-current] .office-thumb-frame { outline-color:var(--accent-primary); }
.office-thumb[aria-current] .office-thumb-number { color:var(--accent-primary); font-weight:700; }

/* Document area */
.office-main { position:relative; display:flex; flex-direction:column; flex:1 1 auto; min-width:0; }
.office-stage { position:relative; flex:1 1 auto; min-height:0; overflow:hidden; background:var(--bg-tertiary); outline:none; }
.office-stage:focus-visible { outline:2px solid var(--accent-primary); outline-offset:-2px; }
.office-surface { position:absolute; inset:0; color:#1f2937; }
.office-surface canvas { display:block; background:#fff; }
.office-drop-overlay { display:none; }
#office-viewer.dragover .office-workspace[data-state="ready"] .office-drop-overlay { display:grid; place-items:center; position:absolute; inset:.75rem; z-index:5; color:var(--accent-primary); background:color-mix(in srgb,var(--accent-primary) 10%,color-mix(in srgb,var(--bg-secondary) 85%,transparent)); border:2px dashed var(--accent-primary); border-radius:.75rem; font-size:2.5rem; pointer-events:none; }

/* Start screen */
.office-start { display:flex; flex:1 1 auto; flex-direction:column; align-items:center; justify-content:center; gap:1rem; min-height:clamp(22rem,55vh,34rem); padding:2rem 1rem; text-align:center; }
.office-workspace[data-state="opening"] .office-start { position:absolute; inset:0; z-index:3; background:var(--bg-secondary); }
.office-drop { display:flex; position:relative; flex-direction:column; align-items:center; gap:.9rem; width:min(100%,40rem); padding:2.25rem 1.5rem; background:color-mix(in srgb,var(--bg-tertiary) 55%,transparent); border:2px dashed var(--border-strong); border-radius:1rem; cursor:pointer; transition:border-color .15s ease,background-color .15s ease; }
.office-drop:hover,#office-viewer.dragover .office-drop { border-color:var(--accent-primary); background:color-mix(in srgb,var(--accent-primary) 6%,var(--bg-secondary)); }
.office-drop:focus-visible,.office-drop:focus-within { outline:2px solid var(--accent-primary); outline-offset:3px; }
.office-drop>strong { font-size:1.05rem; }
.office-drop input { position:absolute; width:1px; height:1px; opacity:0; }
.office-drop-hint { color:var(--text-secondary); font-size:.85rem; }
.office-drop-button { pointer-events:none; }
.office-drop-art { display:flex; align-items:flex-end; margin-bottom:.25rem; filter:drop-shadow(0 6px 10px var(--shadow-color)); }
.office-chip { display:grid; place-items:end center; width:3.2rem; height:4rem; padding-bottom:.5rem; color:#fff; border-radius:.45rem; clip-path:polygon(0 0,70% 0,100% 22%,100% 100%,0 100%); font-family:var(--font-mono); font-size:.66rem; font-weight:700; }
.office-chip-docx { background:#2f6fb7; transform:rotate(-9deg) translate(.45rem,.2rem); }
.office-chip-xlsx { position:relative; z-index:1; background:#1f8a4c; }
.office-chip-pptx { background:#c4531c; transform:rotate(9deg) translate(-.45rem,.2rem); }
.office-status { min-height:1.5em; margin:0; color:var(--text-secondary); }
.office-workspace:is([data-state="loading"],[data-state="opening"]) .office-status::before { content:""; display:inline-block; width:.9em; height:.9em; margin-inline-end:.5rem; vertical-align:-.1em; border:2px solid currentColor; border-right-color:transparent; border-radius:50%; animation:office-spin .8s linear infinite; }
.office-start-meta { display:flex; flex-wrap:wrap; align-items:center; justify-content:center; gap:.5rem 1rem; color:var(--text-secondary); font-size:.82rem; }
.office-start-meta i { margin-inline-end:.35rem; color:var(--accent-primary); }
.office-shell kbd { padding:.05rem .4rem; color:var(--text-secondary); background:var(--bg-tertiary); border:1px solid var(--border-primary); border-bottom-width:2px; border-radius:.3rem; font-family:var(--font-mono); font-size:.72rem; }
@keyframes office-spin { to { transform:rotate(360deg); } }
@media (hover:none) { .office-start-shortcut { display:none; } }
@media (prefers-reduced-motion:reduce) { .office-workspace .office-status::before { animation-duration:2.4s; } }

/* Wide: secondary actions are inline icon buttons. */
@container office (min-width:861px) {
    #office-viewer .office-overflow,#office-viewer .office-overflow[hidden] { display:contents !important; }
    #office-more { display:none; }
    .office-overflow .office-menu-item { justify-content:center; width:2.25rem; height:2.25rem; min-height:0; padding:0; color:var(--text-secondary); border:1px solid transparent; border-radius:.45rem; }
    .office-overflow .office-menu-item>i { color:inherit; }
    .office-overflow .office-menu-item:hover:not(:disabled) { color:var(--text-primary); }
    .office-overflow .office-label { position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0); }
}
/* Compact: page and zoom controls move to a bottom bar, the rest to a menu. */
@container office (max-width:860px) {
    .office-shell { grid-template:"start end" auto "find find" auto "alert alert" auto "body body" minmax(0,1fr) "center center" auto "status status" auto / minmax(0,1fr) auto; }
    .office-appbar { display:contents; }
    .office-appbar-start,.office-appbar-end { min-height:3rem; padding:.35rem .5rem; border-bottom:1px solid var(--border-primary); }
    .office-appbar-start { grid-area:start; }
    .office-appbar-end { grid-area:end; }
    .office-appbar-center { grid-area:center; justify-content:center; padding:.35rem .5rem; border-top:1px solid var(--border-primary); }
    .office-sidebar { position:absolute; inset-block:0; inset-inline-start:0; z-index:4; width:min(12rem,70%); box-shadow:10px 0 28px var(--shadow-color); }
    .office-statusbar { min-height:1.75rem; }
    #office-export-status { margin-inline-start:0; }
    .office-statusbar>:first-child { flex:1 1 auto; }
}
@container office (max-width:460px) {
    #office-scale,.office-divider,.office-format { display:none; }
    .office-appbar-center { gap:.25rem; }
    .office-findbar-icon,#office-search { display:none; }
    #office-query { flex-basis:5rem; }
    .office-start { padding:1.25rem .75rem; }
    .office-drop { padding:1.75rem 1rem; }
}
@media (pointer:coarse) {
    .office-icon-btn,.office-shell .input,.office-findbar .btn { min-width:2.5rem; min-height:2.5rem; }
    .office-icon-btn { width:2.5rem; height:2.5rem; }
}
@media(max-width:768px) {
    .office-workspace[data-state="opening"],.office-workspace[data-state="ready"] { height:calc(100dvh - 4.25rem); min-height:22rem; }
}

/* Fullscreen, through the Fullscreen API or the fixed-position fallback. */
.office-workspace:fullscreen,.office-workspace.office-fullscreen { width:100%; height:100dvh !important; max-height:none; margin:0; border:0; border-radius:0; }
.office-workspace.office-fullscreen { position:fixed; inset:0; z-index:10000; }

/* Installed app window: the viewer is the whole window. */
@media (display-mode:standalone),(display-mode:minimal-ui),(display-mode:window-controls-overlay) {
    #top-nav,#side-menu,#site-footer,.overlay,.page-title,.office-intro,.office-help { display:none !important; }
    #page { min-height:100dvh; margin:0 !important; padding:0 !important; background:var(--bg-secondary); }
    #content-container { max-width:none; }
    .office-workspace,.office-workspace[data-state] { height:100dvh; min-height:0; border:0; border-radius:0; }
}

.office-help { margin-top:1rem; }
.office-help summary { font-weight:600; cursor:pointer; padding:.25rem 0; }
.office-help p:first-of-type { margin-top:.75rem; }
.office-help p+p { margin-top:.65rem; }
.office-help a { color:var(--accent-primary); text-decoration:underline; }

/* The independent reader deliberately has no site navigation or toolbars. */
.office-reader-body { height:100dvh; overflow:hidden; }
#office-reader { position:fixed; inset:0; background:var(--bg-tertiary); }
#office-reader [hidden] { display:none !important; }
#office-reader-stage { width:100%; height:100%; min-height:0; outline:none; }
#office-reader-stage canvas { background:#fff; }
#office-reader-status,#office-reader-empty { position:absolute; z-index:1; inset-inline:1rem; max-width:36rem; margin:auto; text-align:center; }
#office-reader-status { top:40%; padding:1rem; color:var(--text-secondary); background:var(--bg-primary); border-radius:.5rem; }
#office-reader-empty { top:60%; }
#office-reader-empty a { color:var(--accent-primary); text-decoration:underline; }