:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #1b2430;
  --muted: #5d6b7c;
  --border: #dde3ea;
  --control-border: #848f9c; /* >= 3:1 against --surface for form controls */
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --accent-soft: #e7f0ff;
  --ok: #146c2e;
  --ok-soft: #e6f4ea;
  --warn: #7a5200;
  --warn-soft: #fff4d6;
  --err: #c62828;
  --err-soft: #fdecec;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141a;
    --surface: #171d25;
    --surface-2: #1d2530;
    --text: #e6ebf1;
    --muted: #9aa7b6;
    --border: #2b3542;
    --control-border: #5f6c7d;
    --accent: #4c8dff;
    --accent-text: #0b1220;
    --accent-soft: #1b2a44;
    --ok: #4cc26a;
    --ok-soft: #15301d;
    --warn: #e0b13f;
    --warn-soft: #34290f;
    --err: #ff6b6b;
    --err-soft: #3a1717;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.1rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 .75rem; }
a { color: var(--accent); }
code { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .9em; background: var(--surface-2); padding: .1em .35em; border-radius: 4px; }
[hidden] { display: none !important; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
.wrap-wide { max-width: 1200px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.nowrap { white-space: nowrap; }
.mono { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .85em; }

.topbar { background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; }
.brand svg { width: 26px; height: 26px; flex: none; }
.topbar-right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }

main { padding: 24px 0 48px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin-bottom: 16px; }
.card.narrow { max-width: 420px; margin: 48px auto; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 38px; padding: 0 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font: inherit; font-weight: 500; cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-primary:hover { background: var(--accent); filter: brightness(1.08); }
.btn-danger { color: var(--err); }
.btn-sm { min-height: 30px; padding: 0 10px; font-size: .85rem; }
.btn-link { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; cursor: pointer; text-decoration: underline; }
.btn-link.danger { color: var(--err); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

label.label, .label { display: block; font-weight: 600; margin: 14px 0 6px; }
input[type=text], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--control-border); border-radius: 8px;
  background: var(--surface); color: var(--text); font: inherit;
}
textarea { resize: vertical; }
#note[readonly] { background: var(--surface-2); color: var(--muted); }
.check { display: flex; gap: 8px; align-items: center; margin-top: 10px; }
.check input { width: auto; }
.hint { font-size: .85rem; color: var(--muted); margin-top: 4px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1 1 200px; }
.actions { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; margin-top: 16px; }

.alert { border-radius: 8px; padding: 10px 12px; margin: 12px 0; border: 1px solid transparent; }
.alert-err { background: var(--err-soft); color: var(--err); border-color: color-mix(in srgb, var(--err) 30%, transparent); }
.alert-ok { background: var(--ok-soft); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.alert-warn { background: var(--warn-soft); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.alert-info { background: var(--accent-soft); color: var(--text); border-color: color-mix(in srgb, var(--accent) 30%, transparent); }
.alert > :last-child { margin-bottom: 0; }
.alert ul { margin: 4px 0 8px; padding-left: 20px; }

/* Visually hidden, still read by screen readers. */
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* Upload page */
.dropzone {
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 32px 16px; text-align: center;
  background: var(--surface-2); transition: border-color .15s, background .15s;
}
.dropzone.over, body.dragging .dropzone { border-color: var(--accent); background: var(--accent-soft); }
.dropzone svg { width: 44px; height: 44px; color: var(--accent); }
.drop-title { font-size: 1.1rem; font-weight: 600; margin: 8px 0 4px; }
.drop-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin: 8px 0 12px; }

.reading { margin: 12px 0 0; }
.queue-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-top: 20px; }
.queue-head h2:focus { outline: none; }
.queue-head h2:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.queue { list-style: none; margin: 8px 0 0; padding: 0; border: 1px solid var(--border); border-radius: 8px; max-height: 420px; overflow: auto; }
.item { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.item:last-child { border-bottom: 0; }
.item-main { display: flex; justify-content: space-between; gap: 12px; }
.item-name { overflow-wrap: anywhere; font-weight: 500; }
.item-size { color: var(--muted); white-space: nowrap; font-size: .9rem; }
.item-foot { display: flex; align-items: center; gap: 12px; font-size: .85rem; margin-top: 4px; }
.item-status { color: var(--muted); flex: 1; }
.item[data-status=done] .item-status { color: var(--ok); }
.item[data-status=error] .item-status { color: var(--err); }

.bar { height: 6px; background: var(--border); border-radius: 99px; overflow: hidden; margin-top: 6px; }
.bar > span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.item[data-status=done] .bar > span { background: var(--ok); }
.item[data-status=error] .bar > span { background: var(--err); }
.item[data-status=ready] .bar { visibility: hidden; }
.overall { margin-top: 16px; }
.overall .bar { height: 10px; }

.result h2 { margin-top: 4px; }
.result ul { margin: 8px 0 0; padding-left: 20px; max-height: 240px; overflow: auto; }

.history { list-style: none; margin: 0; padding: 0; }
.history li { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-bottom: 1px solid var(--border); font-size: .9rem; }
.history li:last-child { border-bottom: 0; }
.history .name { overflow-wrap: anywhere; }

.foot { text-align: center; margin-top: 24px; }

/* Admin */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.tab { background: none; border: 0; border-bottom: 2px solid transparent; padding: 8px 14px; font: inherit; color: var(--muted); cursor: pointer; }
.tab[aria-selected=true] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; }
td.num, th.num { text-align: right; white-space: nowrap; }
.cell-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: .78rem; font-weight: 600; white-space: nowrap; }
.badge-ok { background: var(--ok-soft); color: var(--ok); }
.badge-off { background: var(--err-soft); color: var(--err); }
.badge-warn { background: var(--warn-soft); color: var(--warn); }
.chip { font-size: .8rem; color: var(--muted); border: 1px solid var(--border); border-radius: 99px; padding: 2px 10px; white-space: nowrap; }
.chip.warn { color: var(--warn); border-color: var(--warn); }
.batch { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 14px; }
.batch-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding: 10px 12px; background: var(--surface-2); border-bottom: 1px solid var(--border); border-radius: 8px 8px 0 0; }
.batch-note { padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: pre-wrap; background: var(--accent-soft); }
tr.msg-row td { background: var(--surface-2); color: var(--muted); }
tr.msg-row td > a { color: var(--muted); font-size: .85rem; }
.msg-label { font-weight: 600; color: var(--text); }
.empty { padding: 28px; text-align: center; color: var(--muted); }
.linkbox { display: flex; gap: 8px; margin-top: 6px; }
.linkbox input { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .85rem; }

dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 20px; width: min(560px, calc(100vw - 32px)); box-shadow: 0 10px 40px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(10, 15, 25, .45); }
dialog h2 { margin-bottom: 4px; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 8px 16px; border-radius: 8px; font-size: .9rem; z-index: 50; }

@media (max-width: 640px) {
  .card { padding: 16px; }
  .item-main { flex-direction: column; gap: 0; }
  th.hide-sm, td.hide-sm { display: none; }
}