/* Theme: follows the computer's setting by default; the header button can force light or dark. */
:root {
  --bg: #d9e2e8; --panel: #f3f6f8; --panel-2: #e6edf1; --text: #121c24; --muted: #4a5a67; --line: #b9c7d1;
  --accent: #0f766e; --accent-hover: #0b5e58; --accent-text: #ffffff; --accent-soft: #c6e7e3;
  --danger: #b42318; --ok: #1a7f4b; --shadow: 0 1px 2px rgba(16, 24, 40, .12), 0 4px 14px rgba(16, 24, 40, .12);
  --stage: #4b5563;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1418; --panel: #182026; --panel-2: #1d262d; --text: #e6edf2; --muted: #93a1ad; --line: #2a353e;
    --accent: #2dd4bf; --accent-hover: #5eead4; --accent-text: #05211e; --accent-soft: #123530;
    --danger: #ff8a80; --ok: #5fd39a; --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 18px rgba(0, 0, 0, .35);
    --stage: #0b0f12; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1418; --panel: #182026; --panel-2: #1d262d; --text: #e6edf2; --muted: #93a1ad; --line: #2a353e;
  --accent: #2dd4bf; --accent-hover: #5eead4; --accent-text: #05211e; --accent-soft: #123530;
  --danger: #ff8a80; --ok: #5fd39a; --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 18px rgba(0, 0, 0, .35);
  --stage: #0b0f12; color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
       background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; }

/* header */
header { display: flex; align-items: center; gap: 12px; padding: 12px 22px; background: var(--panel);
         border-bottom: 1px solid var(--line); }
.logo { width: 34px; height: 34px; flex: none; }
.logo rect { fill: var(--accent); }
.logo .doc { fill: var(--accent-text); }
.logo .tick { fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.brand { display: flex; flex-direction: column; line-height: 1.2; }
h1 { font-size: 16px; margin: 0; letter-spacing: -.01em; }
.tagline { color: var(--muted); font-size: 12px; }
#status { color: var(--muted); margin-left: 14px; padding: 3px 10px; border-radius: 99px; background: var(--panel-2);
          border: 1px solid var(--line); font-size: 12px; }
.spacer { flex: 1; }

/* toolbar */
nav { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 10px 22px; background: var(--panel);
      border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.sep { width: 1px; height: 22px; background: var(--line); margin: 0 6px; }

button, select, input[type=text], input[type=number] {
  font: inherit; color: inherit; background: var(--panel); border: 1px solid var(--line);
  border-radius: 9px; padding: 7px 13px; transition: border-color .12s, background .12s, box-shadow .12s;
}
input:focus-visible, select:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button { cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: .4; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
button.ghost { background: transparent; }
button.big { padding: 11px 22px; font-size: 15px; }

/* page grid */
main { flex: 1; padding: 22px; position: relative; }
main.dragging { outline: 3px dashed var(--accent); outline-offset: -12px; background: var(--accent-soft); }
#grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
.card { background: var(--panel); border: 2px solid transparent; border-radius: 13px; padding: 9px; cursor: pointer;
        user-select: none; position: relative; box-shadow: var(--shadow); transition: transform .12s, box-shadow .12s; }
.card:hover { transform: translateY(-2px); }
.card img { width: 100%; display: block; background: #fff; border-radius: 6px; border: 1px solid var(--line); }
.card.selected { border-color: var(--accent); background: var(--accent-soft); }
.card.dragover-before { box-shadow: -6px 0 0 0 var(--accent); }
.card.dragover-after { box-shadow: 6px 0 0 0 var(--accent); }
.card.dragging { opacity: .4; }
.card .meta { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: 12px; color: var(--muted); }
.card .meta strong { background: var(--panel-2); color: var(--text); border: 1px solid var(--line);
                     border-radius: 99px; min-width: 24px; text-align: center; padding: 0 7px; }
.card.selected .meta strong { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.card .meta .src { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card .zoom { position: absolute; top: 14px; right: 14px; padding: 2px 8px; opacity: 0; font-size: 13px; }
.card:hover .zoom { opacity: 1; }
.card .check { position: absolute; top: 14px; left: 14px; width: 22px; height: 22px; border-radius: 50%;
               background: var(--accent); color: var(--accent-text); display: none; align-items: center;
               justify-content: center; font-size: 13px; font-weight: 700; }
.card.selected .check { display: flex; }

/* empty state */
#empty { display: flex; justify-content: center; padding: 60px 0; }
.empty-card { text-align: center; border: 2px dashed var(--line); border-radius: 20px; padding: 44px 64px;
              background: var(--panel); max-width: 480px; }
.empty-card h2 { margin: 6px 0 0; font-size: 20px; }
.empty-card p { color: var(--muted); margin: 8px 0; }
.empty-icon { font-size: 44px; }

#help { margin: 0; padding: 8px 22px 16px; color: var(--muted); font-size: 12px; display: flex; flex-wrap: wrap; gap: 6px 16px; justify-content: space-between; }
#help a { color: var(--accent); text-decoration: none; }
#help a:hover { text-decoration: underline; }
.hint { color: var(--muted); font-size: 12px; margin: 4px 0; }

/* dialogs */
dialog { border: 1px solid var(--line); border-radius: 16px; background: var(--panel); color: var(--text);
         padding: 24px 26px; width: min(560px, 94vw); max-height: 94vh; overflow: auto; box-shadow: 0 20px 60px rgba(0,0,0,.35); }
dialog::backdrop { background: rgba(8, 12, 16, .55); backdrop-filter: blur(2px); }
dialog h2 { margin: 0 0 14px; font-size: 18px; }
dialog label { display: block; margin: 8px 0; }
dialog label input[type=text] { width: 100%; margin-top: 4px; }
dialog fieldset { border: 1px solid var(--line); border-radius: 11px; margin: 12px 0; padding: 6px 14px 10px; background: var(--panel-2); }
dialog legend { color: var(--muted); font-size: 12px; padding: 0 6px; }
dialog label.sub { margin-left: 24px; font-size: 12px; color: var(--muted); }
dialog menu { display: flex; justify-content: flex-end; gap: 8px; padding: 0; margin: 18px 0 0; }
input[type=checkbox], input[type=radio] { accent-color: var(--accent); }
.num { width: 90px; padding: 4px 8px; }
.hint.block { display: block; margin: 2px 0 0 22px; }

#expResult, .msg { border-radius: 11px; padding: 12px 14px; margin-top: 14px; background: var(--panel-2); border: 1px solid var(--line); }
#expResult.ok { border-color: var(--ok); }
#expResult.warn, .msg.err { border-color: var(--danger); }
.msg.err { color: var(--danger); }
#expResult .part { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 8px; }
#expResult .part input.pname { flex: 1 1 200px; min-width: 0; padding: 6px 10px; }
#expResult .part .psize { color: var(--muted); white-space: nowrap; font-size: 12px; }
#expResult .note { margin-top: 8px; font-size: 12px; color: var(--muted); }

/* preview */
#previewDlg { width: min(1000px, 96vw); height: 94vh; padding: 0; display: none; flex-direction: column; }
#previewDlg[open] { display: flex; }
#pvBar { display: flex; align-items: center; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); }
#pvBody { flex: 1; overflow: auto; background: var(--stage); padding: 18px; text-align: center; }
#pvImg { max-width: 100%; background: #fff; box-shadow: 0 4px 24px rgba(0,0,0,.5); }

#toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: #18222b; color: #fff;
         padding: 10px 18px; border-radius: 10px; z-index: 50; max-width: 90vw; box-shadow: var(--shadow); }
#toast.err { background: var(--danger); color: #fff; }

/* touch + small screens */
.menu-btn { display: none; }
.card .mv { display: none; margin-left: auto; padding: 4px 9px; font-size: 12px; line-height: 1; }
.card .mv + .mv { margin-left: 0; }
@media (hover: none) {
  .card .zoom { opacity: 1; padding: 6px 10px; }
  .card .mv { display: inline-block; }
  .card .meta .src { flex: 1; min-width: 0; }
  .card .mv:first-of-type { margin-left: 0; }
}
@media (max-width: 700px) {
  header { padding: 10px 12px; gap: 8px; flex-wrap: wrap; }
  header .brand { min-width: 0; }
  header .tagline { display: none; }
  header h1 { font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  #status { order: 5; flex-basis: 100%; margin: 0; padding: 0; background: none; border: 0; box-shadow: none; font-size: 12px; text-align: left; }
  header .spacer { display: none; }
  header .ghost:first-of-type { margin-left: auto; }
  header .ghost + .ghost { margin-left: 0; }
  header button { padding: 5px 9px; font-size: 13px; white-space: nowrap; }
  #toolbar { flex-wrap: wrap; padding: 8px 12px; gap: 6px; }
  #toolbar button { white-space: nowrap; padding: 9px 10px; font-size: 14px; }
  #addBtn { order: 1; flex: 1 1 auto; }
  #exportBtn { order: 2; flex: 1 1 auto; }
  #menuBtn { order: 3; display: inline-block; }
  #toolbar .sec { display: none; order: 4; flex: 1 1 30%; }
  #toolbar.open .sec { display: inline-block; }
  #toolbar.open #menuBtn { background: var(--accent-soft); border-color: var(--accent); }
  #toolbar .sep { display: none; }
  #grid { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 10px; gap: 10px; }
  .card { padding: 7px; }
  .card .meta { gap: 5px; }
  #help { padding: 8px 12px 18px; }
  #help .by { margin-left: auto; }
  dialog { width: calc(100vw - 20px); max-width: none; max-height: calc(100dvh - 20px); padding: 16px; }
  #previewDlg { width: 100vw; max-width: none; height: 100dvh; max-height: none; border-radius: 0; margin: 0; }
  .part { flex-wrap: wrap; }
  .part .pname { flex: 1 1 100%; }
  input, select { font-size: 16px; } /* stops iOS zooming into fields */
}
@media (hover: none) { #help .hints { display: none; } #help { justify-content: center; } #help .by { margin-left: 0 !important; } }

.sizes { margin: 6px 0 10px; font-weight: 600; }
.badge { font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 99px; white-space: nowrap; }
.badge.good { background: var(--accent-soft); color: var(--accent); }
.badge.bad { background: #fbd5d5; color: #8a1c1c; }
@media (prefers-color-scheme: dark) { .badge.bad { background: #4a1f1f; color: #ffb4b4; } }
:root[data-theme="dark"] .badge.bad { background: #4a1f1f; color: #ffb4b4; }
:root[data-theme="light"] .badge.bad { background: #fbd5d5; color: #8a1c1c; }

/* scan a document (phones) */
/* Scan is switched off for now. To bring it back: delete this rule and re-enable the media query below. */
.scan-only { display: none !important; }
/* @media (max-width: 700px), (hover: none) { .scan-only { display: inline-block; } } */
.empty-card .scan-only { margin-top: 10px; }
#scanDlg { width: min(560px, calc(100vw - 20px)); }
.scan-modes { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 10px; }
.scan-modes label { margin: 0; }
#scanPreview { text-align: center; background: var(--panel-2); border-radius: 10px; padding: 8px; }
#scanPreview canvas { max-width: 100%; max-height: 52vh; width: auto; height: auto; border-radius: 4px; box-shadow: 0 2px 10px rgba(0,0,0,.25); }
#scanDlg menu { flex-wrap: wrap; }
.scan-a4 { margin: 0 0 10px; }

/* presets */
.presets { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 0 0 10px; }
.presets button { padding: 5px 11px; border-radius: 99px; font-size: 13px; }
.presets button.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
#expLook { margin-top: 4px; max-width: 100%; }

/* privacy badge, size estimate, file chips */
.lock { color: var(--muted); font-size: 12px; white-space: nowrap; }
.lock-short { display: none; }
#status.over { color: #b45309; font-weight: 600; }
:root[data-theme="dark"] #status.over { color: #fbbf24; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) #status.over { color: #fbbf24; } }
.files { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 22px 0; }
.chip { display: inline-flex; align-items: center; gap: 6px; max-width: 100%; padding: 3px 4px 3px 10px; border-radius: 99px;
        background: var(--panel); border: 1px solid var(--line); font-size: 12px; }
.chip-name { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip-size { color: var(--muted); white-space: nowrap; }
.chip-x { padding: 1px 7px; border-radius: 99px; font-size: 11px; line-height: 1.4; }

/* export dialog: summary, more options, progress */
.summary { margin: 4px 0 10px; padding: 8px 12px; border-radius: 10px; background: var(--accent-soft); color: var(--text); font-size: 13px; }
details#moreOpts > summary { cursor: pointer; font-weight: 600; margin: 6px 0; padding: 4px 0; }
.bar { height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; margin: 10px 0 8px; }
.bar > i { display: block; height: 100%; width: 3%; background: var(--accent); transition: width .25s ease; }

/* keyboard focus */
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.card:focus-visible { outline-offset: 0; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }

@media (max-width: 700px) {
  .files { padding: 8px 12px 0; }
  .chip-name { max-width: 150px; }
  .lock-long { display: none; }
  .lock-short { display: inline; }
  #status { flex: 1 1 auto; }
  .lock { order: 6; }
  /* main actions live in a bar at the bottom, in thumb reach; the Tools panel opens above it */
  #toolbar { position: fixed; top: auto; left: 0; right: 0; bottom: 0; z-index: 30; align-content: flex-end; flex-wrap: wrap-reverse; background: var(--panel);
             border-top: 1px solid var(--line); box-shadow: 0 -4px 16px rgba(16, 24, 40, .14);
             padding: 8px 12px calc(8px + env(safe-area-inset-bottom)); border-bottom: 0; }
  body { padding-bottom: 76px; }
  #toast { bottom: 96px; }
}