/* The client's own screen. Hand-written and small on purpose: it is a list, a text box and a
   button, and the interesting surface is the node's panel filling the viewport underneath.

   Everything here is sized for a thumb — 44 px is Apple's own minimum touch target and nothing
   tappable is under it — and the safe-area insets are what keep the list clear of a notch and the
   home indicator when this is installed and running full-bleed. */

:root {
  --bg: #f5f6f8;
  --fg: #14161a;
  --muted: #6b7280;
  --line: #dfe3e8;
  --card: #ffffff;
  --accent: #2f6fed;
  --danger: #b42318;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101215;
    --fg: #e8eaed;
    --muted: #98a2b3;
    --line: #262b31;
    --card: #191c21;
    --accent: #6ea0ff;
    --danger: #f97066;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  /* A tap that also selects text feels broken on a phone; inputs opt back in below. */
  -webkit-user-select: none;
  user-select: none;
  -webkit-text-size-adjust: 100%;
}

code, .key { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.shell {
  max-width: 34rem;
  margin: 0 auto;
  padding: max(1.25rem, env(safe-area-inset-top)) 1.25rem max(1.25rem, env(safe-area-inset-bottom));
}

header h1 { margin: 0; font-size: 1.6rem; letter-spacing: -0.02em; }
header .sub { margin: 0.15rem 0 1.5rem; color: var(--muted); font-size: 0.95rem; }

.problem {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
  color: var(--danger);
  border-radius: 0.6rem;
  padding: 0.75rem 0.9rem;
  font-size: 0.9rem;
  /* An error from a node is a sentence, sometimes with a key in it; let it wrap rather than clip. */
  overflow-wrap: anywhere;
}

.empty { color: var(--muted); font-size: 0.95rem; }

.nodes { list-style: none; margin: 0 0 1.75rem; padding: 0; display: grid; gap: 0.6rem; }
.nodes li { display: flex; gap: 0.5rem; align-items: stretch; }

button {
  font: inherit;
  border-radius: 0.7rem;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--fg);
  min-height: 44px;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: default; }

.node {
  flex: 1;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  text-align: left;
}
.node .name { font-weight: 600; }
.node .meta { color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.8rem; }

.ghost { color: var(--muted); background: transparent; }
.danger { color: var(--danger); background: transparent; border-color: color-mix(in srgb, var(--danger) 35%, transparent); }
.primary { background: var(--accent); border-color: var(--accent); color: #fff; width: 100%; font-weight: 600; }

.add { display: grid; gap: 0.6rem; }
.add label { font-weight: 600; font-size: 0.95rem; }
/* Scan beside Pair, not above it: it is the accelerator and Pair is the flow that always works. */
.actions { display: flex; gap: 0.6rem; }
.actions .primary { flex: 1; }

textarea, input {
  font: 15px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace;
  width: 100%;
  padding: 0.7rem 0.8rem;
  border-radius: 0.7rem;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--fg);
  -webkit-user-select: text;
  user-select: text;
  /* Under 16 px iOS zooms the page on focus and never zooms back out. */
  font-size: 16px;
}
input.rename { flex: 1; }

.note { color: var(--muted); font-size: 0.85rem; margin: 0; }
.label { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; margin: 0 0 0.3rem; }

footer { margin-top: 2.5rem; border-top: 1px solid var(--line); padding-top: 1.25rem; display: grid; gap: 0.5rem; }
footer .key { font-size: 0.78rem; color: var(--muted); overflow-wrap: anywhere; -webkit-user-select: text; user-select: text; }

/* --- the camera ---------------------------------------------------------------------------- */

/* Full-bleed and black, because it is a viewfinder: everything on top of it is white on the
   picture, and the picture is the only thing being read. */
.scanner { position: fixed; inset: 0; z-index: 10; background: #000; }
.scanner video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

/* The square `scan::Reader` actually decodes is the centre of the frame; this is what says so.
   The huge spread shadow is the dimming around it — one box, no second element. */
.scanner .reticle {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 70vmin;
  height: 70vmin;
  transform: translate(-50%, -50%);
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: 1rem;
  box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0.35);
  /* A tap anywhere on the picture is the retry for a video that would not autoplay, and this sits
     over most of it. */
  pointer-events: none;
}

.scanner .scanbar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  gap: 0.75rem;
  justify-items: center;
  padding: 1.5rem 1.25rem max(1.25rem, env(safe-area-inset-bottom));
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.65));
}
.scanner .hint { margin: 0; color: #fff; font-size: 0.95rem; text-align: center; text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8); }
.scanner .scanbar button { min-width: 9rem; color: #fff; background: rgba(255, 255, 255, 0.18); border-color: rgba(255, 255, 255, 0.35); }

/* --- a node's panel ------------------------------------------------------------------------ */

.panel { position: fixed; inset: 0; display: flex; flex-direction: column; background: var(--bg); }
.panel .bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: max(0.4rem, env(safe-area-inset-top)) 0.6rem 0.4rem;
  border-bottom: 1px solid var(--line);
}
.panel .back { border: 0; background: transparent; color: var(--accent); padding-left: 0.4rem; }
.panel .title { font-weight: 600; font-size: 0.95rem; }
.panel iframe { flex: 1; width: 100%; border: 0; background: var(--card); }