/* Files, the transfer page: its layout and its own parts. The
   tokens, the controls and the shared components' look come first
   (shared/tokens.css, shared/components.css). Two panes side by side,
   each its place's head, then the tree beside the list with the preview
   under it; a narrow pane (a container query) shows a path line instead
   of the tree. Below 760 px (the emulator's breakpoint) the panes stack
   and one shows at a time, with a switch above. The queue sits under the
   panes.

   Every rule is under #files-view (the view's root, iteration 50b), in
   :where() so the specificity stays what it was; the host page lays the
   root out (web/index.html). */

:where(#files-view) {
  /* The view: a column filling what its host gives it. */
  & {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
  }
  &[hidden] { display: none; }

  /* ------------------------------------------------------------------ bar */

  .tx-bar {
    display: flex;
    align-items: center;
    gap: var(--s1);
    flex: none;
    height: var(--bar-top);
    padding: var(--safe-t) calc(var(--s2) + var(--safe-r)) 0 calc(var(--gutter) + var(--safe-l));
    background: var(--panel);
    border-bottom: 1px solid var(--rule);
  }
  .brand {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    margin-right: auto;
    min-width: 0;
    color: inherit;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.01em;
  }
  .brand .logo { display: block; flex: none; }
  .logo .planet { fill: #d9874a; }
  .logo .ring { fill: none; stroke: #3f9a8c; stroke-width: 2.6; stroke-linecap: round; }
  .brand-tx { color: var(--accent); }
  /* The way to the emulator (shared/site-links.js), quiet beside Settings. */
  .bar-link {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    flex: none;
    min-height: var(--tap);
    padding: 0 var(--s2);
    border-radius: var(--r-md);
    color: var(--ink);
    font-size: var(--fs-md);
    text-decoration: none;
  }
  .bar-link:hover { background: var(--hover); }
  & button.bar-link { border: 0; background: transparent; box-shadow: none; font: inherit; font-size: var(--fs-md); cursor: pointer; }
  /* "Show the packets": lit while the panel is open. */
  .bar-cable.on { background: var(--accent-soft); color: var(--accent-text); }
  @media (max-width: 520px) {
    .bar-cable span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  }

  /* ------------------------------------------------------------------ panes */

  .tx-main {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: var(--s3);
    padding: var(--s3) calc(var(--gutter) + var(--safe-r)) calc(var(--s3) + var(--safe-b)) calc(var(--gutter) + var(--safe-l));
  }
  /* The switch between the panes: only when they are stacked. */
  .pane-switch { display: none; }
  .panes {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--s3);
  }
  .pane {
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-1);
    overflow: hidden;
    container: pane / inline-size;
  }
  .pane.drop { outline: 2px dashed var(--accent); outline-offset: -3px; }
  .pane-head {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--s2) var(--s3);
    padding: var(--s3) var(--s3) var(--s3) var(--s4);
    background: var(--panel);
    border-bottom: 1px solid var(--rule);
  }
  .pane-place { min-width: 0; flex: 1 1 200px; }
  .pane-place h2 { margin: 0; font-size: var(--fs-lg); font-weight: 600; line-height: var(--lh-tight); overflow-wrap: anywhere; }
  .pane-progress { font-variant-numeric: tabular-nums; }
  /* The status line: what the place does now, in the body size (iteration 45: it was easy to miss). */
  .pane-status { margin: 2px 0 0; min-height: 1.4em; font-size: var(--fs-md); color: var(--ink); overflow-wrap: anywhere; }
  .pane-status-text:empty + .pane-progress:empty { display: none; }
  .pane-actions { display: flex; align-items: center; gap: var(--s1); flex-wrap: wrap; }
  .pane-change, .pane-emulator { gap: var(--s1); }
  /* A phone: the place's name and the buttons on one row, the name wrapping;
     "Open in the emulator" is in the ⋯ menu there (pane.js NARROW_HEAD). */
  @media (max-width: 479px) {
    .pane-head { flex-wrap: nowrap; }
    .pane-place { flex: 1 1 0; }
    .pane-actions { flex-wrap: nowrap; }
    .pane-emulator { display: none; }
  }

  /* The card where there is no list: what the pane can show, and the ways in. */
  .pane-empty { flex: 1; overflow: auto; display: flex; align-items: flex-start; justify-content: center; }
  .start { max-width: 60ch; padding: var(--s6) var(--gutter); }
  .start h2 { margin: 0 0 var(--s2); font-size: var(--fs-xl); line-height: var(--lh-tight); overflow-wrap: anywhere; }
  .start p { margin: 0 0 var(--s4); color: var(--muted); line-height: var(--lh); }
  .start-actions { display: flex; flex-wrap: wrap; gap: var(--s2); margin-bottom: var(--s4); }
  .start-note { color: var(--ink) !important; padding: var(--s3); background: var(--panel); border: 1px solid var(--rule); border-radius: var(--r-md); }

  .pane-body {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(130px, 190px) minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr) auto;
    grid-template-areas: "tree list" "tree preview";
  }
  .pane-body:has(> .preview[hidden]) { grid-template-areas: "tree list" "tree list"; }
  .pane-body > device-tree { grid-area: tree; border-right: 1px solid var(--rule-soft); min-height: 0; }
  .pane-list { grid-area: list; min-width: 0; min-height: 0; display: flex; flex-direction: column; }
  .pane-list device-list { flex: 1; overflow: auto; }
  .crumbs { display: none; align-items: center; flex-wrap: wrap; gap: var(--s1); padding: var(--s2) var(--s3); border-bottom: 1px solid var(--rule-soft); font-family: var(--mono); font-size: var(--fs-md); }
  .crumbs .crumb { font-family: inherit; min-height: 28px; overflow-wrap: anywhere; }
  .crumbs .crumb[aria-current] { color: var(--ink); text-decoration: none; font-weight: 600; }
  .crumb-sep { color: var(--muted); }

  /* A narrow pane: the path line instead of the tree, the type under the name. */
  @container pane (max-width: 539px) {
    .pane-body, .pane-body:has(> .preview[hidden]) { grid-template-columns: minmax(0, 1fr); grid-template-areas: "list" "preview"; }
    .pane-body > device-tree { display: none; }
    .crumbs { display: flex; }
    .dlist .col-kind, .dlist .col-checksum, .dlist .col-modified { display: none; }
    .dlist-kind-inline { display: inline; }
  }

  /* ------------------------------------------------------------------ queue */

  .queue { flex: none; background: var(--panel); border: 1px solid var(--rule); border-radius: var(--r-lg); padding: var(--s2) var(--s3) var(--s3) var(--s4); max-height: 30vh; overflow: auto; }
  .queue-head { display: flex; align-items: center; gap: var(--s3); flex-wrap: wrap; }
  .queue-head h2 { margin: 0 auto 0 0; font-size: var(--fs-md); font-weight: 600; }
  .queue-head button.link { font-size: var(--fs-sm); }
  .queue-list { list-style: none; margin: var(--s1) 0 0; padding: 0; display: flex; flex-direction: column; gap: var(--s1); }
  .queue-job { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; grid-template-areas: "label state cancel" "bar bar bar"; align-items: center; gap: 2px var(--s2); min-height: 32px; font-size: var(--fs-md); }
  .queue-label { grid-area: label; min-width: 0; overflow-wrap: anywhere; }
  .queue-job.running .queue-label { font-weight: 600; }
  .queue-state { grid-area: state; font-size: var(--fs-sm); font-variant-numeric: tabular-nums; white-space: nowrap; }
  .queue-cancel { grid-area: cancel; }
  .queue-bar { grid-area: bar; width: 100%; height: 6px; accent-color: var(--accent); }

  /* The backup dialog's numbers. */
  .backup-memory { display: grid; grid-template-columns: auto auto; justify-content: start; gap: var(--s1) var(--s4); margin: 0; font-size: var(--fs-md); }
  .backup-memory dt { color: var(--muted); }
  .backup-memory dd { margin: 0; font-family: var(--mono); font-variant-numeric: tabular-nums; }

  /* ------------------------------------------------------------------ preview */

  .preview { grid-area: preview; min-width: 0; min-height: 0; overflow: auto; background: var(--paper); }
  .preview-head { display: flex; align-items: flex-start; gap: var(--s1); padding: var(--s3) var(--s2) var(--s2) var(--s4); }
  .preview-title { min-width: 0; margin-right: auto; }
  .preview-title h2 { margin: 0; font: 600 var(--fs-lg)/var(--lh-tight) var(--mono); overflow-wrap: anywhere; }
  .preview-meta { margin: 3px 0 0; color: var(--muted); font-size: var(--fs-sm); }
  .preview-body { padding: 0 var(--s4) var(--s4); display: flex; flex-direction: column; gap: var(--s2); }
  .preview-body > p { margin: 0; line-height: var(--lh); }
  .preview-show { align-self: flex-start; }
  /* A preview being read (iteration 45): what, from where, how far, how long. */
  .reading { display: flex; flex-direction: column; gap: var(--s2); padding: var(--s3); background: var(--panel); border: 1px solid var(--rule-soft); border-radius: var(--r-md); }
  .reading p { margin: 0; line-height: var(--lh); }
  .reading-line { font-weight: 600; overflow-wrap: anywhere; }
  .reading-amount { font-variant-numeric: tabular-nums; font-family: var(--mono); font-size: var(--fs-md); }
  .reading-amount:empty { display: none; }
  .reading-hint { font-size: var(--fs-sm); }
  .reading-bar { position: relative; height: 8px; border-radius: 4px; background: var(--rule-soft); overflow: hidden; }
  .reading-bar > span { display: block; height: 100%; width: 0; background: var(--accent); border-radius: inherit; transition: width 0.2s linear; }
  .reading-bar.unknown > span { width: 30%; animation: busy-slide 1.4s ease-in-out infinite; }
  @media (prefers-reduced-motion: reduce) {
    .reading-bar > span { transition: none; }
    .reading-bar.unknown > span { animation: none; width: 100%; opacity: 0.35; }
  }
  & pre.obj, .obj-list, .grid-wrap {
    margin: 0;
    background: var(--display);
    color: var(--display-ink);
    border-radius: var(--r-sm);
    box-shadow: var(--inset);
  }
  & pre.obj { padding: 10px 12px; font: var(--fs-md)/1.55 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; user-select: text; }
  .obj-program .line { display: block; padding-left: calc(var(--d) * 2ch); }
  .obj-string::before { content: "“"; color: var(--muted); }
  .obj-string::after { content: "”"; color: var(--muted); }
  .more, .unavailable { color: var(--muted); font-size: var(--fs-sm); }
  .preview-error { color: var(--error); }
  .obj-list { padding: 0; list-style: none; counter-reset: item; }
  .obj-list li { display: flex; align-items: baseline; gap: 10px; padding: 4px 12px; counter-increment: item; }
  .obj-list li + li { border-top: 1px solid color-mix(in srgb, var(--display-ink) 14%, transparent); }
  .obj-list li::before { content: counter(item); flex: none; width: 3ch; text-align: right; color: var(--muted); font: var(--fs-xs)/1.6 var(--mono); }
  .obj-list .obj { font: var(--fs-md)/1.5 var(--mono); min-width: 0; overflow-wrap: anywhere; margin-right: auto; }
  .obj-list .muted { font-size: var(--fs-sm); white-space: nowrap; }
  .partial .obj { color: var(--muted); font-style: italic; }
  .grid-wrap { overflow: auto; }
  .obj-grid { border-collapse: collapse; font: var(--fs-md)/1.5 var(--mono); }
  .obj-grid td { padding: 4px 12px; text-align: right; white-space: nowrap; }
  .graphic-wrap { overflow: auto; max-height: 360px; padding: var(--s2); background: var(--display); border-radius: var(--r-sm); box-shadow: var(--inset); }
  & canvas.graphic { display: block; image-rendering: pixelated; }

  /* ------------------------------------------------------------------ the cable

     "Show the packets" (iteration 45): every packet, live. Its own look on
     purpose, the same in both themes: green monospace on black, a faint
     glow on the line that just came. Contrast: the green on the black is
     about 14:1, the dim payload about 6:1, red about 7:1. */

  .cable {
    --cable-bg: #040805;
    --cable-ink: #4dff7a;
    --cable-dim: #46b062;
    --cable-rule: #173322;
    --cable-bad: #ff6b6b;
    flex: none;
    display: flex;
    flex-direction: column;
    height: 34vh;
    min-height: 180px;
    max-height: 480px;
    background: var(--cable-bg);
    color: var(--cable-ink);
    border: 1px solid var(--cable-rule);
    border-radius: var(--r-lg);
    overflow: hidden;
    color-scheme: dark;
  }
  .cable[hidden] { display: none; }
  .cable-head { display: flex; align-items: center; flex-wrap: wrap; gap: var(--s1) var(--s3); padding: var(--s2) var(--s2) var(--s2) var(--s4); border-bottom: 1px solid var(--cable-rule); }
  .cable-head h2 { margin: 0; font: 600 var(--fs-md)/1.2 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; text-shadow: 0 0 6px rgb(77 255 122 / 0.45); }
  .cable-state { margin: 0 auto 0 0; font: var(--fs-sm)/1.2 var(--mono); color: #c4ffd3; }
  .cable-actions { display: flex; flex-wrap: wrap; gap: var(--s1); }
  .cable-actions button { background: transparent; color: var(--cable-ink); border-color: #2c5c3a; font-family: var(--mono); font-size: var(--fs-sm); }
  .cable-actions button:hover:not(:disabled) { background: #0d2414; border-color: #3f8a55; }
  .cable-actions button:focus-visible { outline: 2px solid var(--cable-ink); outline-offset: 1px; }
  .cable-actions button[aria-pressed="true"] { background: #1a4a26; color: #e0ffe8; }
  .cable-actions .ic { color: var(--cable-ink); }
  .cable-key { margin: 0; padding: var(--s1) var(--s4); font: var(--fs-xs)/1.4 var(--mono); color: var(--cable-dim); border-bottom: 1px solid var(--cable-rule); }
  .cable-scroll { flex: 1; min-height: 0; overflow: auto; overscroll-behavior: contain; }
  .cable-scroll:focus-visible { outline: 2px solid var(--cable-ink); outline-offset: -2px; }
  .cable-list { list-style: none; margin: 0; padding: var(--s1) 0 var(--s2); font: 12.5px/1.5 var(--mono); }
  .cable-line {
    display: grid;
    grid-template-columns: 7ch 1ch 1ch 6ch 6ch minmax(0, 1fr);
    grid-template-areas: "t src dir type len desc" ". . . data data data";
    column-gap: 1ch;
    padding: 0 var(--s4);
    animation: cable-in 0.7s ease-out;
  }
  .cable-line > span { min-width: 0; white-space: nowrap; }
  .cl-t { grid-area: t; color: var(--cable-dim); text-align: right; font-variant-numeric: tabular-nums; }
  .cl-src { grid-area: src; color: var(--cable-dim); }
  .cl-dir { grid-area: dir; }
  .cl-type { grid-area: type; font-weight: 700; }
  .cl-len { grid-area: len; color: var(--cable-dim); text-align: right; }
  .cable-line > .cl-desc { grid-area: desc; white-space: normal; overflow-wrap: anywhere; }
  .cable-line > .cl-data { grid-area: data; display: flex; gap: 2ch; color: var(--cable-dim); overflow: hidden; }
  .cl-text, .cl-hex { overflow: hidden; text-overflow: ellipsis; white-space: pre; }
  .cl-text { flex: 0 1 auto; }
  .cl-hex { flex: 1 1 0; }
  .cable-line.link { color: #a6f5bb; font-style: italic; }
  .cable-line.bad, .cable-line.bad .cl-t, .cable-line.bad .cl-src, .cable-line.bad .cl-len, .cable-line.bad .cl-data { color: var(--cable-bad); }
  .cable-line:last-child { text-shadow: 0 0 6px rgb(77 255 122 / 0.55); }
  .cable-line.bad:last-child { text-shadow: 0 0 6px rgb(255 107 107 / 0.5); }
  @media (prefers-reduced-motion: reduce) {
    .cable-line { animation: none; }
    .cable-line:last-child { text-shadow: none; }
  }

  /* ------------------------------------------------------------------ dialogs */

  & dialog.tx-dialog {
    width: min(520px, calc(100vw - 2 * var(--gutter)));
    max-height: calc(100vh - 2 * var(--gutter));
    padding: 0;
    border: 1px solid var(--rule);
    border-radius: var(--r-xl);
    background: var(--panel);
    color: var(--ink);
    box-shadow: var(--shadow-3);
  }
  .tx-dialog-box { padding: var(--s4) var(--gutter) var(--s3); display: flex; flex-direction: column; gap: var(--s3); }
  .tx-dialog-box h2 { margin: 0; font-size: var(--fs-lg); line-height: var(--lh-tight); }
  .tx-dialog-box h3 { margin: var(--s2) 0 0; }
  .tx-dialog-box p { margin: 0; line-height: var(--lh); overflow-wrap: anywhere; }
  .tx-dialog-box ol, .tx-dialog-box ul { margin: 0; padding-left: 1.4em; line-height: var(--lh); }
  .tx-dialog-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--s2); margin-top: var(--s2); }
  .connect-steps { display: flex; flex-direction: column; gap: var(--s2); padding: var(--s3); background: var(--paper); border: 1px solid var(--rule-soft); border-radius: var(--r-md); }
  .keys { display: flex; flex-wrap: wrap; gap: var(--s1); }
  & kbd.calc-key { min-width: 28px; text-align: center; font-size: var(--fs-md); padding: 2px 6px; }
  .connect-help summary { cursor: pointer; color: var(--accent-text); }
  .connect-help ul { margin-top: var(--s2); font-size: var(--fs-md); }
  .xmodem-keys { margin: 0; }
  .xmodem-command { display: inline-block; font-family: var(--mono); font-size: var(--fs-lg); padding: var(--s1) var(--s2); background: var(--panel); border: 1px solid var(--rule-soft); border-radius: var(--r-md); overflow-wrap: anywhere; }
  .xmodem-notes { font-size: var(--fs-md); color: var(--muted); }
  .xmodem-notes:empty { display: none; }
  .xmodem-bar { width: 100%; }
  .xmodem-status:empty { display: none; }
  .xmodem-restart { display: flex; flex-direction: column; gap: var(--s2); }
  .xmodem-restart-keys:empty { display: none; }
  .emulated-roms { display: flex; flex-direction: column; gap: var(--s2); }
  .rom-choice { justify-content: flex-start; min-height: 48px; text-align: left; }
  .rom-choice > span { display: flex; flex-direction: column; min-width: 0; line-height: var(--lh-tight); }
  .rom-choice .muted { font-size: var(--fs-sm); overflow-wrap: anywhere; }
  .settings-row { display: flex; align-items: center; justify-content: space-between; gap: var(--s3); }
  .settings-note { font-size: var(--fs-sm); }
  /* The desktop app's port list: an adapter's name can be long. */
  #port-select { flex: 1; min-width: 0; max-width: 100%; }
  #name-input { min-height: var(--tap); padding: 0 var(--s2); border: 1px solid var(--control-border); border-radius: var(--r-md); background: var(--control); font-family: var(--mono); }
  .error { color: var(--error); }
  #name-problem:empty { display: none; }

  /* ------------------------------------------------------------------ widths */

  .preview { border-left: 0; border-top: 1px solid var(--rule); max-height: 40vh; }
  @media (max-width: 759px) {
    .tx-main { padding: 0; gap: 0; }
    .pane-switch { display: flex; align-self: stretch; margin: var(--s2) var(--gutter); border-radius: var(--r-md); }
    .pane-switch button { flex: 1 1 0; min-width: 0; min-height: var(--tap); }
    .pane-switch .switch-name { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .panes { grid-template-columns: minmax(0, 1fr); gap: 0; }
    .panes[data-active="left"] > .pane[data-pane="right"], .panes[data-active="right"] > .pane[data-pane="left"] { display: none; }
    .pane { border-width: 1px 0 0; border-radius: 0; box-shadow: none; }
    .pane-head { padding-left: var(--gutter); }
    .queue { border-width: 1px 0 0; border-radius: 0; padding-left: var(--gutter); padding-bottom: calc(var(--s3) + var(--safe-b)); }
    .cable { border-width: 1px 0 0; border-radius: 0; height: 36vh; padding-bottom: var(--safe-b); }
    .cable-head { padding-left: var(--gutter); }
    .cable-key { padding-inline: var(--gutter); }
    /* A phone: the time, the arrow and the packet on one line, what it is under them. */
    .cable-line { grid-template-columns: 6ch 1ch 1ch minmax(0, 1fr); grid-template-areas: "t src dir type" ". . . desc" ". . . data"; padding: 2px var(--gutter); }
    .cl-len { display: none; }
    .cl-type { text-align: left; }
    .start { padding-top: var(--s5); }
  }
  @media (max-width: 560px) {
    & dialog.tx-dialog {
      inset: auto 0 0 0;
      width: 100%;
      max-width: 100%;
      margin: 0;
      border-width: 1px 0 0;
      border-radius: var(--r-xl) var(--r-xl) 0 0;
    }
    .tx-dialog-box { padding-bottom: calc(var(--s3) + var(--safe-b)); }
    .tx-dialog-actions > button { flex: 1 1 auto; }
  }
}

/* Keyframes cannot nest: here, under names only Files uses. */
@keyframes busy-slide { from { transform: translateX(-100%); } to { transform: translateX(340%); } }
@keyframes cable-in { from { background: rgb(77 255 122 / 0.16); } to { background: transparent; } }