:root {
  --bg: #f6f7f9; --fg: #14171c; --muted: #5b6472; --card: #ffffff; --line: #dde1e7;
  --accent: #157a63; --accent-fg: #ffffff; --warn-bg: #fff6dc; --warn-line: #e9c96a;
  --danger: #b4232f; --ok: #157a63; --chip: #eef1f4;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --fg: #e8ebef; --muted: #98a2b1; --card: #181b21; --line: #2a2f38;
    --accent: #5ec4a8; --accent-fg: #0f1115; --warn-bg: #332a12; --warn-line: #6d5a1e;
    --danger: #ff6b76; --ok: #5ec4a8; --chip: #232832; }
}
* { box-sizing: border-box; }
/* The hidden attribute must win over any display rule below. */
[hidden] { display: none !important; }
body { margin: 0; font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--fg);
  padding-bottom: env(safe-area-inset-bottom); }
main { max-width: 760px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.5rem; margin: 0 0 8px; } h2 { font-size: 1.2rem; margin: 8px 0; } h3 { font-size: 1.05rem; margin: 0 0 8px; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px;
  padding-top: max(12px, env(safe-area-inset-top)); border-bottom: 1px solid var(--line); background: var(--card); position: sticky; top: 0; z-index: 2; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; }
.who { display: flex; align-items: center; gap: 8px; font-size: .9rem; flex-wrap: wrap; justify-content: flex-end; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 12px 0; }
.card.warn, .banner.warn { background: var(--warn-bg); border-color: var(--warn-line); }
.card.danger { border-color: var(--danger); }
.banner { padding: 10px 16px; border-bottom: 1px solid var(--line); display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
label { display: block; margin: 10px 0; font-size: .9rem; color: var(--muted); }
label.inline { display: inline-flex; gap: 6px; margin-right: 16px; color: var(--fg); }
input, textarea, select { display: block; width: 100%; margin-top: 4px; padding: 10px 12px; font: inherit; color: var(--fg);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
input[type=radio] { display: inline; width: auto; margin: 0; }
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85rem; }
fieldset { border: 1px solid var(--line); border-radius: 8px; margin: 10px 0; padding: 8px 12px; }
button { font: inherit; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--fg); cursor: pointer; min-height: 44px; }
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); font-weight: 600; }
button.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
button.small { padding: 6px 10px; min-height: 36px; font-size: .9rem; }
button.link { border: 0; background: none; color: var(--accent); padding: 4px; min-height: 0; }
button:disabled { opacity: .55; cursor: progress; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; } .row.between { justify-content: space-between; }
.grow { flex: 1; } .narrow { width: 110px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 8px 0 12px; overflow-x: auto; }
.tabs button { border: 0; border-bottom: 3px solid transparent; border-radius: 0; background: none; color: var(--muted); }
.tabs button[aria-selected=true] { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }
.count { display: inline-block; min-width: 1.4em; padding: 0 6px; border-radius: 999px; background: var(--danger); color: #fff; font-size: .8rem; }
.list { list-style: none; padding: 0; margin: 0; }
.list > li { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 8px 0; }
.item-head { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.item-title { font-weight: 600; } .item-meta { font-size: .85rem; color: var(--muted); }
.chip { display: inline-block; padding: 2px 8px; border-radius: 999px; background: var(--chip); font-size: .78rem; }
.chip.pending { background: var(--warn-bg); } .chip.verified { color: var(--ok); } .chip.failed, .chip.denied { color: var(--danger); }
.facts { font: .82rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; background: var(--bg);
  border-radius: 8px; padding: 8px; margin-top: 8px; overflow-x: auto; }
/* One line on a 360px phone; never split inside a group when copied by hand. */
.code { font: 600 clamp(.95rem, 4.6vw, 1.4rem)/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .03em;
  text-align: center; white-space: nowrap; overflow-x: auto;
  background: var(--bg); border: 1px dashed var(--line); padding: 12px 8px; border-radius: 8px; }
.flash { padding: 10px 14px; border-radius: 8px; background: var(--chip); }
.flash.error { background: color-mix(in srgb, var(--danger) 15%, var(--card)); }
details { margin-top: 12px; } details.more { margin-bottom: 16px; } summary { cursor: pointer; color: var(--muted); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .92em; background: var(--surface-2, rgba(127,127,127,.12)); padding: .05em .35em; border-radius: 4px; overflow-wrap: anywhere; }
.steps { padding-left: 1.2em; margin: .5em 0; } .steps li { margin: .35em 0; }
/* A line to paste: shown whole (wraps), with its copy button. */
.copyline { display: flex; gap: 8px; align-items: flex-start; margin: 8px 0; }
.copyline code { flex: 1; display: block; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--bg); font-size: .85rem; line-height: 1.4; user-select: all; -webkit-user-select: all; }
/* Full-screen camera for reading a barcode. */
.overlay { position: fixed; inset: 0; z-index: 10; background: #000; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px; padding: 16px; }
.overlay video { width: 100%; max-width: 520px; max-height: 70vh; object-fit: cover; border-radius: 12px; }
.overlay-hint { color: #fff; text-align: center; margin: 0; }
/* In-app terminal: full screen, keys a phone keyboard lacks along the bottom. */
.term-screen { position: fixed; inset: 0; z-index: 20; display: flex; flex-direction: column; background: #0b0d10;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); }
.term-bar { display: flex; align-items: center; gap: 10px; padding: 8px 12px; color: #e8ebef; border-bottom: 1px solid #2a2f38; }
.term-bar strong { font-weight: 650; } .term-bar .muted { flex: 1; font-size: .85rem; color: #98a2b1; }
.term-view { flex: 1; min-height: 0; padding: 4px; }
.term-keys { display: flex; gap: 4px; padding: 6px; overflow-x: auto; border-top: 1px solid #2a2f38; }
.term-keys button { min-height: 40px; min-width: 44px; padding: 6px 10px; background: #181b21; color: #e8ebef; border-color: #2a2f38;
  font: 600 .9rem ui-monospace, SFMono-Regular, Menlo, monospace; flex: none; }
.term-keys button[aria-pressed=true] { background: #5ec4a8; color: #0b0d10; }