/* ==========================================================================
   Full-screen app pages ("layout": "app" in a tool's front matter).
   The app fills the screen under the header; the help section, "More tools" and the footer follow below it.
   Used with /assets/js/app-shell.js. Documented in docs/TOOL_GUIDE.md ("Full-screen app pages").
   ========================================================================== */

/* ---------- Tokens: the whole page takes the tool's colour as its accent ---------- */
.layout-app {
  --app-bar-h: 56px;
  --app-side-w: 288px;
  --app-status-h: 30px;
  --app-frame-h: calc(100vh - var(--header-h) - env(safe-area-inset-top));
  --app-accent: hsl(var(--tool-hue) 70% 32%);
  --app-accent-hover: hsl(var(--tool-hue) 72% 27%);
  --app-accent-soft: hsl(var(--tool-hue) 80% 95%);
  --app-accent-softer: hsl(var(--tool-hue) 80% 97.5%);
  --app-on-accent: #ffffff;
  --app-canvas: color-mix(in oklab, var(--surface-sunken) 80%, var(--tool-bg));

  --primary: var(--app-accent);
  --primary-hover: var(--app-accent-hover);
  --primary-press: var(--app-accent-hover);
  --primary-soft: var(--app-accent-soft);
  --primary-softer: var(--app-accent-softer);
  --on-primary: var(--app-on-accent);
  --focus: var(--app-accent);
  --ring: 0 0 0 4px color-mix(in srgb, var(--app-accent) 20%, transparent);
  --gradient: linear-gradient(100deg, var(--app-accent), color-mix(in oklab, var(--app-accent) 55%, #ffffff));
}
@supports (height: 1dvh) { .layout-app { --app-frame-h: calc(100dvh - var(--header-h) - env(safe-area-inset-top)); } }
/* Same perceived lightness for every hue (so white text on the accent always reads well). */
@supports (color: oklch(from red l c h)) {
  .layout-app {
    --app-accent: oklch(from hsl(var(--tool-hue) 80% 50%) 0.52 0.15 h);
    --app-accent-hover: oklch(from hsl(var(--tool-hue) 80% 50%) 0.46 0.14 h);
    --app-accent-soft: oklch(from hsl(var(--tool-hue) 80% 50%) 0.96 0.03 h);
    --app-accent-softer: oklch(from hsl(var(--tool-hue) 80% 50%) 0.982 0.014 h);
  }
}
:root[data-theme="dark"] .layout-app {
  --app-accent: hsl(var(--tool-hue) 75% 68%);
  --app-accent-hover: hsl(var(--tool-hue) 80% 76%);
  --app-accent-soft: hsl(var(--tool-hue) 40% 18%);
  --app-accent-softer: hsl(var(--tool-hue) 35% 13%);
  --app-on-accent: #0b0d12;
  --gradient: linear-gradient(100deg, var(--app-accent), color-mix(in oklab, var(--app-accent) 60%, #ffffff));
}
@supports (color: oklch(from red l c h)) {
  :root[data-theme="dark"] .layout-app {
    --app-accent: oklch(from hsl(var(--tool-hue) 80% 50%) 0.79 0.13 h);
    --app-accent-hover: oklch(from hsl(var(--tool-hue) 80% 50%) 0.85 0.11 h);
    --app-accent-soft: oklch(from hsl(var(--tool-hue) 80% 50%) 0.3 0.06 h);
    --app-accent-softer: oklch(from hsl(var(--tool-hue) 80% 50%) 0.24 0.035 h);
  }
}

/* ---------- Header: slimmer, solid and full width on app pages ---------- */
@media (min-width: 641px) { .layout-app { --header-h: 56px; } }
@media (max-height: 500px) and (orientation: landscape) { .layout-app { --header-h: 52px; } }
.layout-app .site-header { background: var(--surface); -webkit-backdrop-filter: none; backdrop-filter: none; border-bottom-color: var(--border); }
.layout-app .site-header > .container { max-width: none; }
.layout-app .brand-mark { width: 30px; height: 30px; }

/* ---------- The frame: exactly the screen under the header ---------- */
.app-frame {
  position: relative;
  display: flex;
  flex-direction: column;
  height: var(--app-frame-h);
  min-height: 300px;
  background: var(--app-canvas);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
/* Start screen: at least the screen, but never cuts anything off on very short screens. */
.app-page[data-state="start"] .app-frame { height: auto; min-height: var(--app-frame-h); overflow: visible; }
.app-view { flex: 1 1 auto; min-height: 0; display: flex; flex-direction: column; animation: app-fade .25s var(--ease) backwards; }

/* ---------- Start screen ---------- */
.app-start {
  position: relative; isolation: isolate; overflow-x: clip;
  align-items: center; text-align: center;
  padding: clamp(1.25rem, 5vh, 3.25rem) var(--gutter) .75rem;
}
.app-start::before {
  content: ""; position: absolute; inset: 0; z-index: -2; pointer-events: none;
  background-image: radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--tool-fg) 22%, transparent) 1px, transparent 0);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(60% 55% at 50% 38%, #000 10%, transparent 75%);
  mask-image: radial-gradient(60% 55% at 50% 38%, #000 10%, transparent 75%);
  opacity: .7;
}
.app-start::after {
  content: ""; position: absolute; z-index: -1; pointer-events: none; left: 50%; top: -18%; width: min(980px, 120%); height: 70%;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, color-mix(in srgb, var(--app-accent) 16%, transparent), transparent 75%);
}
.app-start-inner { width: 100%; max-width: 660px; margin-block: auto; display: flex; flex-direction: column; align-items: center; }
.app-start-icon {
  width: 72px; height: 72px; border-radius: 21px;
  box-shadow: inset 0 0 0 1px var(--tool-ring), 0 14px 34px -14px color-mix(in srgb, var(--app-accent) 60%, transparent);
  animation: pop .5s var(--ease-spring) both;
}
.app-start-icon .icon { width: 36px; height: 36px; }
.app-title { margin: 1.1rem 0 .4rem; font-size: clamp(2rem, 1.35rem + 2.3vw, 2.9rem); letter-spacing: -.035em; animation: rise .5s .04s var(--ease) both; }
.app-lead { margin: 0 0 1.6rem; max-width: 42ch; color: var(--text-soft); font-size: clamp(1rem, .95rem + .3vw, 1.15rem); line-height: 1.5; text-wrap: balance; animation: rise .5s .08s var(--ease) both; }
.app-drop { width: 100%; }
.app-start .dropzone {
  min-height: 268px;
  border-color: color-mix(in srgb, var(--app-accent) 32%, var(--border-strong));
  background: radial-gradient(110% 90% at 50% 0%, color-mix(in srgb, var(--tool-bg) 85%, transparent), transparent 72%), var(--surface);
  box-shadow: var(--shadow);
}
@media (hover: hover) { .app-start .dropzone:hover { box-shadow: var(--shadow-lg); } }
.app-formats { margin: .95rem 0 0; color: var(--text-faint); font-size: .86rem; }
.app-start-extra { margin-top: 1rem; display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem; }
.app-help-link {
  flex: none; display: inline-flex; align-items: center; gap: .35rem; min-height: 44px; margin-top: 1.25rem; padding: 0 1rem;
  border-radius: 99px; color: var(--text-faint); font-size: .85rem; font-weight: 550; text-decoration: none;
  -webkit-tap-highlight-color: transparent; transition: color .15s, background-color .15s;
}
.app-help-link:active { color: var(--app-accent); }
@media (hover: hover) { .app-help-link:hover { color: var(--app-accent); background: color-mix(in srgb, var(--surface) 70%, transparent); } }

/* ---------- Open: app bar ---------- */
.app-work { position: relative; background: var(--app-canvas); }
.app-bar {
  flex: none; position: relative; z-index: 5;
  display: flex; align-items: center; gap: .2rem;
  height: var(--app-bar-h); padding: 0 .5rem 0 .55rem; overflow: hidden;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.app-file { flex: 0 1 auto; min-width: 4.5rem; max-width: min(42ch, 36%); display: flex; align-items: center; gap: .6rem; padding: 0 .4rem 0 .3rem; }
.app-file-icon { width: 32px; height: 32px; border-radius: 9px; }
.app-file-icon .icon { width: 17px; height: 17px; }
.app-file-text { min-width: 0; display: flex; flex-direction: column; line-height: 1.25; }
.app-file-name { font-weight: 650; font-size: .93rem; letter-spacing: -.01em; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.app-file-meta { font-size: .75rem; color: var(--text-faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.app-tools { flex: 1 1 0; min-width: 0; display: flex; align-items: center; gap: .15rem; overflow: hidden; }
.app-tools::before { content: ""; flex: 1 1 0; min-width: 0; } /* pushes the tools to the right, next to the end group */
.app-tools > [data-overflowed], .app-tools > [data-sep-hidden] { display: none !important; }
.app-bar-end { flex: none; display: flex; align-items: center; gap: .15rem; margin-left: .2rem; padding-left: .4rem; border-left: 1px solid var(--border); }

/* Toolbar buttons */
.app-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem; flex: none;
  min-width: 40px; height: 40px; padding: 0 .55rem;
  border: 0; border-radius: 10px; background: transparent; color: var(--text-soft);
  font-weight: 600; font-size: .86rem; line-height: 1; letter-spacing: -.005em; white-space: nowrap; text-decoration: none;
  cursor: pointer; -webkit-tap-highlight-color: transparent; transition: background-color .15s, color .15s, box-shadow .15s;
}
.app-btn .icon { width: 20px; height: 20px; }
@media (hover: hover) { .app-btn:hover:not(:disabled) { background: var(--bg-soft); color: var(--text); } }
.app-btn:active:not(:disabled) { background: var(--surface-sunken); }
.app-btn:focus-visible { outline: none; box-shadow: inset 0 0 0 2px var(--focus); }
.app-btn[aria-pressed="true"], .app-btn[aria-expanded="true"],
.app-btn[aria-pressed="true"]:hover, .app-btn[aria-expanded="true"]:hover { background: var(--app-accent-soft); color: var(--app-accent); }
.app-btn:disabled { opacity: .4; cursor: default; }
.app-btn-accent, .app-btn-accent[aria-pressed="true"] { background: var(--app-accent); color: var(--app-on-accent); padding-inline: .85rem; box-shadow: 0 1px 2px rgb(16 24 40 / .12), inset 0 1px 0 rgb(255 255 255 / .14); }
@media (hover: hover) { .app-btn-accent:hover:not(:disabled) { background: var(--app-accent-hover); color: var(--app-on-accent); } }
.app-btn-accent:active:not(:disabled) { background: var(--app-accent-hover); }
.app-btn-accent:focus-visible { box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--focus); }
.app-sep { flex: none; width: 1px; height: 24px; margin: 0 .25rem; background: var(--border); }
.app-open-btn { color: var(--text); box-shadow: inset 0 0 0 1px var(--border-strong); margin-right: .2rem; }
.app-open-btn:focus-visible { box-shadow: inset 0 0 0 2px var(--focus); }
/* Out of room: labels are hidden visually (screen readers still get them), then buttons move into the ⋮ menu. */
.app-bar.is-compact .app-tools .app-btn-label:not([data-keep-label]),
.app-bar.is-compact-more .app-btn-label:not([data-keep-label]) {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.app-bar.is-compact .app-btn:has(> .app-btn-label) { padding-inline: .55rem; }

/* Zoom: − 100% + */
.app-zoom { display: inline-flex; align-items: center; flex: none; }
.app-zoom-value { min-width: 3.7rem; padding: 0 .35rem; color: var(--text); font-size: .84rem; font-variant-numeric: tabular-nums; }

@media (pointer: coarse) {
  .app-btn { min-width: 44px; height: 44px; }
}

/* ---------- Open: body (side panel + stage) ---------- */
.app-body { flex: 1 1 auto; min-height: 0; display: flex; position: relative; }
.app-side { flex: none; width: var(--app-side-w); min-height: 0; display: flex; flex-direction: column; background: var(--surface); border-right: 1px solid var(--border); }
.app-frame[data-side="closed"][data-side-mode="column"] .app-side { display: none; }
.app-side-head { flex: none; display: flex; align-items: center; justify-content: space-between; gap: .5rem; min-height: 48px; padding: .3rem .35rem .3rem 1rem; }
.app-side-title { margin: 0; font-size: .74rem; font-weight: 650; letter-spacing: .07em; text-transform: uppercase; color: var(--text-faint); }
.app-side-close .app-side-close-x { display: none; }
.app-side-body { flex: 1 1 auto; min-height: 0; overflow-y: auto; }
.app-side-backdrop { display: none; }

.app-stage {
  flex: 1 1 auto; min-width: 0; min-height: 0; position: relative;
  overflow: auto; overscroll-behavior-x: contain; /* sideways never turns into "back"; up/down hands over to the page */
  background: var(--app-canvas); outline: none;
}
.app-stage:focus-visible:not([data-quiet-focus]) { box-shadow: inset 0 0 0 2px var(--focus); }
.app-stage[data-zoomable] { touch-action: pan-x pan-y; } /* the page itself doesn't pinch-zoom; the document does */

.app-status {
  flex: none; display: flex; align-items: center; gap: .4rem 1.25rem; min-height: var(--app-status-h);
  padding: .2rem .9rem calc(.2rem + env(safe-area-inset-bottom));
  background: var(--surface); border-top: 1px solid var(--border);
  color: var(--text-faint); font-size: .78rem; font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden;
}
.app-status:empty { display: none; }

/* ---------- Find bar (floats over the top right of the document) ---------- */
.app-find {
  position: absolute; z-index: 30; top: calc(var(--app-bar-h) + 10px); right: 14px;
  display: flex; align-items: center; gap: .1rem; width: min(460px, calc(100% - 28px)); padding: .3rem;
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow-lg);
  animation: app-pop .18s var(--ease) backwards;
}
.app-find-field { position: relative; flex: 1 1 auto; min-width: 0; display: flex; align-items: center; }
.app-find-field > .icon { position: absolute; left: .65rem; width: 17px; height: 17px; color: var(--text-faint); pointer-events: none; }
.app-find-input {
  width: 100%; min-height: 40px; padding: 0 5.6rem 0 2.15rem;
  border: 1px solid var(--border-strong); border-radius: 10px; background: var(--surface); color: var(--text); font-size: .95rem;
  -webkit-appearance: none; appearance: none;
}
.app-find-input::-webkit-search-cancel-button, .app-find-input::-webkit-search-decoration { -webkit-appearance: none; display: none; }
.app-find-input:focus { outline: none; border-color: var(--app-accent); box-shadow: var(--ring); }
.app-find-count { position: absolute; right: .7rem; color: var(--text-faint); font-size: .78rem; font-variant-numeric: tabular-nums; white-space: nowrap; pointer-events: none; }

/* ---------- Loading and error ---------- */
.app-loading, .app-error { align-items: center; justify-content: center; padding: 2rem var(--gutter); text-align: center; }
.app-loading-card { width: min(100%, 420px); display: flex; flex-direction: column; align-items: center; gap: 1.1rem; }
.app-loading-icon { width: 72px; height: 72px; border-radius: 21px; animation: app-bob 1.6s ease-in-out infinite; }
.app-loading-icon .icon { width: 34px; height: 34px; }
.app-loading-title { margin: 0; max-width: 100%; font-weight: 650; font-size: 1.05rem; overflow-wrap: anywhere; }
.app-loading-title span { color: var(--text-soft); font-weight: 550; }
.app-loading-progress { width: 100%; min-height: 2.2rem; }
.app-error-card {
  width: min(100%, 470px); display: flex; flex-direction: column; align-items: center; gap: .55rem; padding: 2rem 1.5rem 1.6rem;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-xl); box-shadow: var(--shadow);
  animation: pop .35s var(--ease-spring) backwards;
}
.app-error-icon { display: grid; place-items: center; width: 64px; height: 64px; border-radius: 18px; background: var(--danger-soft); color: var(--danger); }
.app-error-icon .icon { width: 30px; height: 30px; }
.app-error-title { margin: .45rem 0 0; font-size: 1.3rem; }
.app-error-msg { margin: 0 0 .6rem; color: var(--text-soft); }
.app-error-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem; }

/* ---------- Drop a file anywhere to open it ---------- */
.app-drop-overlay {
  position: absolute; inset: 0; z-index: 70; display: grid; place-items: center; pointer-events: none;
  background: color-mix(in srgb, var(--bg) 78%, transparent); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
  animation: fade .15s both;
}
.app-drop-card {
  display: flex; flex-direction: column; align-items: center; gap: .6rem; padding: 2rem 2.75rem;
  border: 2px dashed var(--app-accent); border-radius: var(--radius-xl); background: var(--surface); box-shadow: var(--shadow-lg);
  color: var(--app-accent);
}
.app-drop-card .icon { width: 40px; height: 40px; }
.app-drop-card p { margin: 0; color: var(--text); font-weight: 650; }

/* ---------- Menus (⋮, zoom): dropdown, or a bottom sheet on phones ---------- */
.app-menu {
  position: fixed; z-index: 120; min-width: 236px; max-width: min(340px, calc(100vw - 16px));
  max-height: calc(100vh - 16px); max-height: calc(100dvh - 16px); overflow-y: auto;
  padding: .35rem; background: var(--surface); color: var(--text); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow-lg);
  outline: none; animation: app-pop .14s var(--ease) backwards;
}
.app-menu-item {
  display: flex; align-items: center; gap: .7rem; width: 100%; min-height: 40px; padding: .45rem .65rem;
  border: 0; border-radius: 9px; background: none; color: var(--text); font: inherit; font-size: .9rem; font-weight: 500; line-height: 1.3;
  text-align: left; cursor: pointer; -webkit-tap-highlight-color: transparent;
}
.app-menu-item .icon { width: 18px; height: 18px; flex: none; color: var(--text-soft); }
.app-menu-noicon { width: 18px; flex: none; }
.app-menu-label { flex: 1 1 auto; min-width: 0; }
.app-menu-kbd { margin-left: auto; padding: 0; border: 0; background: none; color: var(--text-faint); font-family: var(--font-sans); font-size: .76rem; white-space: nowrap; }
.app-menu-item .app-menu-check { color: var(--app-accent); }
.app-menu-item:focus-visible { outline: none; background: var(--bg-soft); box-shadow: inset 0 0 0 2px var(--focus); }
@media (hover: hover) { .app-menu-item:hover:not(:disabled) { background: var(--bg-soft); } }
.app-menu-item:active:not(:disabled) { background: var(--surface-sunken); }
.app-menu-item:disabled { opacity: .45; cursor: default; }
.app-menu-item.is-danger, .app-menu-item.is-danger .icon { color: var(--danger); }
.app-menu-sep { height: 1px; margin: .3rem .3rem; background: var(--border); }
.app-menu-heading { margin: .45rem .65rem .2rem; color: var(--text-faint); font-size: .72rem; font-weight: 650; letter-spacing: .07em; text-transform: uppercase; }
.app-menu-title { margin: .1rem .8rem .4rem; font-weight: 650; font-size: 1rem; }
.app-menu.is-sheet {
  left: 0; right: 0; top: auto; bottom: 0; width: 100%; min-width: 0; max-width: none;
  max-height: min(80vh, 640px); max-height: min(80dvh, 640px);
  padding: .5rem max(.6rem, env(safe-area-inset-right)) calc(.75rem + env(safe-area-inset-bottom)) max(.6rem, env(safe-area-inset-left));
  border-width: 1px 0 0; border-radius: var(--radius-xl) var(--radius-xl) 0 0; overscroll-behavior: contain;
  animation: sheet-up .26s var(--ease) backwards;
}
.app-menu.is-sheet::before { content: ""; display: block; width: 40px; height: 4px; margin: .15rem auto .6rem; border-radius: 99px; background: var(--border-strong); }
.app-menu.is-sheet .app-menu-item { min-height: 52px; gap: .9rem; padding-inline: .8rem; font-size: 1rem; }
.app-menu.is-sheet .app-menu-item .icon { width: 21px; height: 21px; }
.app-menu.is-sheet .app-menu-kbd { display: none; }
.app-menu-backdrop { position: fixed; inset: 0; z-index: 119; background: rgb(12 15 23 / .42); animation: fade .2s both; }
:root.app-menu-open, :root.app-menu-open body { overflow: hidden; }

/* Keyboard-shortcuts list (dialog) */
.app-keys { width: 100%; border-collapse: collapse; font-size: .92rem; }
.app-keys th { padding: .55rem .75rem .55rem 0; border-bottom: 1px solid var(--border); text-align: left; font-weight: 500; color: var(--text); }
.app-keys td { padding: .55rem 0; border-bottom: 1px solid var(--border); text-align: right; white-space: nowrap; color: var(--text-faint); font-size: .85rem; }
.app-keys tr:last-child > * { border-bottom: 0; }
.app-keys-or { font-size: .8rem; }

/* ---------- Full screen ---------- */
.app-frame:fullscreen { height: 100%; min-height: 0; border: 0; }
.app-frame.is-pseudo-fullscreen {
  position: fixed; inset: 0; z-index: 90; height: 100vh; height: 100dvh; min-height: 0; border: 0;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) 0 env(safe-area-inset-left);
}
:root.app-fs-lock, :root.app-fs-lock body { overflow: hidden; }

/* ---------- Below the frame: breadcrumb, help, more tools ---------- */
.app-below { background: var(--bg); }
.app-below-head { padding-top: 1.4rem; }
.app-below-head .crumbs { margin: 0; }
.app-below .tool-help { border-top: 0; padding-top: 1.1rem; }
.app-below .tool-help:focus { outline: none; }

/* ---------- Tablets: the side panel slides over the document ---------- */
@media (max-width: 920px) {
  .app-side {
    position: absolute; z-index: 20; top: 0; bottom: 0; left: 0; width: min(320px, 86%);
    box-shadow: var(--shadow-lg); visibility: hidden; transform: translateX(-102%);
    transition: transform .26s var(--ease), visibility 0s linear .26s;
  }
  .app-frame[data-side="open"] .app-side { visibility: visible; transform: none; transition: transform .26s var(--ease); }
  .app-side-body { overscroll-behavior: contain; }
  .app-side-close > .icon:first-child { display: none; }
  .app-side-close .app-side-close-x { display: block; }
  .app-side-backdrop {
    display: block; position: absolute; inset: 0; z-index: 15; opacity: 0; pointer-events: none;
    background: rgb(12 15 23 / .32); transition: opacity .2s var(--ease);
  }
  .app-frame[data-side="open"] .app-side-backdrop { opacity: 1; pointer-events: auto; }
}

/* ---------- Phones ---------- */
@media (max-width: 640px) {
  .layout-app { --app-bar-h: 52px; }
  .layout-app .brand-mark { width: 30px; height: 30px; }
  .app-bar { gap: .1rem; padding: 0 .3rem 0 .35rem; }
  /* The buttons keep their room; the file name takes what is left (at least 4.5rem, then "…"). */
  .app-file { flex: 1 1 0; max-width: none; padding: 0 .25rem; }
  .app-file-icon { display: none; }
  .app-file-name { font-size: .92rem; }
  .app-tools { flex: 0 0 auto; }
  .app-tools::before { display: none; }
  .app-hide-phone { display: none !important; }
  .app-bar-end { margin-left: 0; padding-left: 0; border-left: 0; gap: 0; }
  .app-open-btn { box-shadow: none; margin-right: 0; }
  .app-open-btn .app-btn-label { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
  .app-zoom-out, .app-zoom-in { display: none; }
  .app-status { gap: .3rem .9rem; padding-inline: .75rem; font-size: .74rem; }
  .app-find { top: var(--app-bar-h); left: 0; right: 0; width: auto; padding: .4rem .5rem; border-width: 0 0 1px; border-radius: 0; box-shadow: var(--shadow); }
  .app-find-input { min-height: 44px; font-size: 16px; }

  .app-start { padding: 1rem var(--gutter) .25rem; }
  .app-start-icon { width: 54px; height: 54px; border-radius: 16px; }
  .app-start-icon .icon { width: 27px; height: 27px; }
  .app-title { margin: .75rem 0 .3rem; font-size: clamp(1.6rem, 1.15rem + 2.4vw, 1.95rem); }
  .app-lead { margin-bottom: 1.1rem; font-size: .98rem; }
  .app-start .dropzone { min-height: 0; }
  .app-formats { margin-top: .7rem; font-size: .82rem; }
  .app-help-link { margin-top: .5rem; }
  .app-error-card { padding: 1.6rem 1.1rem 1.3rem; }
  .app-below-head { padding-top: 1rem; }
}
@media (max-width: 374px) {
  .app-start .dropzone { padding-inline: .75rem; }
  .app-start .dropzone .btn > .icon { display: none; } /* "Choose presentation" stays on one line */
  .app-help-link { font-size: .8rem; padding-inline: .6rem; }
}
/* Short screens (landscape phones, small laptops): less air on the start screen. */
@media (max-height: 640px) {
  .app-start { padding-top: 1rem; }
  .app-start-icon { width: 50px; height: 50px; border-radius: 15px; }
  .app-start-icon .icon { width: 25px; height: 25px; }
  .app-title { margin-top: .65rem; }
  .app-lead { margin-bottom: 1rem; }
  .app-start .dropzone { min-height: 0; padding-block: 1.4rem; }
  .app-help-link { margin-top: .4rem; }
}
@media (max-height: 500px) and (orientation: landscape) {
  .layout-app { --app-bar-h: 50px; --app-status-h: 26px; }
}

/* ---------- Motion ---------- */
@keyframes app-fade { from { opacity: 0; } }
@keyframes app-pop { from { opacity: 0; transform: translateY(-4px) scale(.98); } }
@keyframes app-bob { 50% { transform: translateY(-5px); } }

/* ---------- Print: only the document ---------- */
@media print {
  .app-bar, .app-find, .app-side, .app-side-backdrop, .app-status, .app-below, .app-start, .app-loading, .app-error,
  .app-drop-overlay, .app-menu, .app-menu-backdrop { display: none !important; }
  .app-frame, .app-work, .app-body, .app-stage {
    display: block !important; position: static !important; height: auto !important; min-height: 0 !important;
    overflow: visible !important; background: none !important; border: 0 !important; box-shadow: none !important;
  }
}