:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --border: #e3ded6;
  --ink: #1c1a17;
  --muted: #6f6862;
  --accent: #8a3a1f;
  --accent-ink: #ffffff;
  --ok: #2f6b45;
  --warn: #8a6a1f;
  --err: #a3301c;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16150f;
    --surface: #201e18;
    --border: #34302a;
    --ink: #f0ece5;
    --muted: #a19a91;
    --accent: #d46b3e;
    --accent-ink: #1c1a17;
    --ok: #6fbf8c;
    --warn: #d9b45c;
    --err: #e07a63;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 ui-sans-serif, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header.bar {
  border-bottom: 1px solid var(--border);
  padding: 14px 22px;
  display: flex; align-items: center; gap: 12px;
  background: var(--surface);
}
header.bar .mark { font-weight: 700; letter-spacing: -0.02em; }
header.bar .sub { color: var(--muted); font-size: 13px; }
header.bar .spacer { flex: 1; }
main { max-width: 860px; margin: 0 auto; padding: 32px 22px 64px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}
h1 { font-size: 24px; margin: 0 0 6px; letter-spacing: -0.02em; }
h2 { font-size: 17px; margin: 0 0 14px; }
p.lede { color: var(--muted); margin: 0 0 22px; }
label { display: block; font-size: 13px; font-weight: 600; margin: 14px 0 5px; }
input, select {
  width: 100%; padding: 10px 12px; font: inherit;
  background: var(--bg); color: var(--ink);
  border: 1px solid var(--border); border-radius: 8px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
input.code {
  font: 600 26px/1 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.4em; text-align: center; padding: 16px 12px;
}
button {
  font: inherit; font-weight: 600; cursor: pointer;
  padding: 10px 18px; border-radius: 8px;
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink);
}
button.ghost { background: transparent; color: var(--ink); border-color: var(--border); }
button:disabled { opacity: .5; cursor: not-allowed; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 18px; }
.msg { padding: 11px 14px; border-radius: 8px; font-size: 14px; margin: 16px 0 0; }
.msg.err { background: color-mix(in srgb, var(--err) 12%, transparent); color: var(--err); }
.msg.ok  { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }
.msg.info{ background: color-mix(in srgb, var(--muted) 12%, transparent); color: var(--muted); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .05em;
     color: var(--muted); padding: 8px 10px; border-bottom: 1px solid var(--border); }
td { padding: 11px 10px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
.pill { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 9px;
        border-radius: 999px; background: color-mix(in srgb, var(--muted) 14%, transparent); }
.pill.done { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }
.pill.wait { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
code.link { display: block; padding: 11px 13px; background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; font-size: 12px;
  word-break: break-all; margin-top: 10px; }
.drop {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 34px 20px; text-align: center; color: var(--muted); margin-top: 8px;
}
.drop.hot { border-color: var(--accent); color: var(--accent); }
.muted { color: var(--muted); font-size: 13px; }
ul.docs { list-style: none; padding: 0; margin: 14px 0 0; }
ul.docs li { display: flex; align-items: center; gap: 10px; padding: 10px 0;
             border-bottom: 1px solid var(--border); font-size: 14px; }
ul.docs li:last-child { border-bottom: none; }
ul.docs .name { flex: 1; }
[hidden] { display: none !important; }

/* QR codes are always dark-on-white regardless of theme. Inverting one in dark
   mode makes it unreadable to most scanners — contrast polarity matters to the
   decoder, not just to the eye. */
.qr {
  background: #ffffff; padding: 14px; border-radius: var(--radius);
  border: 1px solid var(--border); display: inline-block; margin: 8px 0 4px;
  line-height: 0;
}
.qr svg { display: block; width: 208px; height: 208px; }
details.manual { margin-top: 16px; }
details.manual summary {
  cursor: pointer; font-size: 13px; font-weight: 600; color: var(--muted);
  padding: 6px 0;
}
details.manual[open] summary { margin-bottom: 4px; }

button.ghost.small {
  font-size: 12px; padding: 4px 10px; font-weight: 600;
}
ul.docs .name.muted { color: var(--muted); text-decoration: line-through; }

/* Tabbed document viewer */
.tabbar {
  display: flex; gap: 3px; overflow-x: auto;
  border-bottom: 1px solid var(--border);
}
.tabbar button {
  background: transparent; border: 1px solid transparent; border-bottom: none;
  color: var(--muted); font-size: 13px; font-weight: 600;
  padding: 9px 15px; border-radius: 8px 8px 0 0; white-space: nowrap;
  margin-bottom: -1px;
}
.tabbar button:hover { color: var(--ink); }
.tabbar button.active {
  background: var(--bg); border-color: var(--border); color: var(--ink);
}
.viewport {
  border: 1px solid var(--border); border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--bg); min-height: 60vh;
  display: flex; align-items: center; justify-content: center; overflow: auto;
}
/* PDFs always render on white — a dark page background shows through the
   viewer's own chrome and makes scanned documents hard to read. */
.viewport iframe { width: 100%; height: 68vh; border: 0; background: #fff; }
.viewport img { max-width: 100%; max-height: 68vh; object-fit: contain; }
.viewport .placeholder { padding: 40px 24px; text-align: center; color: var(--muted); }