/* Senet device harness.
   A dark, high-contrast surface: the phone is used indoors, at full brightness,
   with a second phone pointed at it. */
:root {
  --ink: #f4f1ec;
  --dim: #a29a8f;
  --bg: #12100e;
  --panel: #1c1916;
  --line: #2e2924;
  --gold: #d9a441;
  --ok: #5fbf7f;
  --warn: #e0b341;
  --bad: #e2685f;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
  -webkit-text-size-adjust: 100%;
}

header {
  position: sticky; top: 0; z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  padding: max(env(safe-area-inset-top), 8px) 16px 8px;
}

.brand {
  font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--gold); font-size: 14px;
}

/* --- network banner ------------------------------------------------------ */
.banner {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; margin-top: 6px; flex-wrap: wrap;
}
.banner .dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.banner.online .dot { background: var(--ok); }
.banner.offline .dot { background: var(--bad); }
.banner .label { font-weight: 700; letter-spacing: .08em; }
.banner.online .label { color: var(--ok); }
.banner.offline .label { color: var(--bad); }
.banner .detail { color: var(--dim); font-variant-numeric: tabular-nums; }

/* --- tabs ---------------------------------------------------------------- */
nav {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: var(--bg);
}
nav button {
  background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--dim); padding: 12px 4px; font-size: 14px; font-weight: 600;
}
nav button.selected { color: var(--gold); border-bottom-color: var(--gold); }

main { padding: 16px 16px 64px; max-width: 640px; margin: 0 auto; }

h1 { font-size: 22px; margin: 4px 0 16px; }
h2 { font-size: 16px; margin: 24px 0 8px; color: var(--dim); text-transform: uppercase; letter-spacing: .08em; }
.lead { color: var(--dim); }
.hint { color: var(--dim); font-size: 13px; }

/* --- form controls ------------------------------------------------------- */
.field { display: block; margin: 12px 0; }
.field > span { display: block; font-size: 13px; color: var(--dim); margin-bottom: 4px; }
input, textarea {
  width: 100%; padding: 12px; font-size: 16px; /* 16px stops iOS zooming on focus */
  background: var(--panel); color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px;
  font-family: inherit;
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }

button, .button {
  display: inline-block; text-decoration: none; text-align: center;
  padding: 12px 16px; font-size: 15px; font-weight: 600;
  border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel); color: var(--ink);
  margin: 4px 4px 4px 0;
}
button:disabled { opacity: .5; }
button.primary, .button { background: var(--gold); color: #191510; border-color: var(--gold); }
button.big { display: block; width: 100%; padding: 16px; font-size: 17px; }
button.danger { color: var(--bad); border-color: var(--bad); background: none; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }

.choices { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.choice { margin: 0; }
.choice.selected { border-color: var(--gold); color: var(--gold); }

/* --- cards --------------------------------------------------------------- */
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 16px; margin: 16px 0;
}
.address, .uri {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px; word-break: break-all; color: var(--dim); margin: 4px 0;
}
.balance { font-size: 26px; font-weight: 700; margin: 8px 0 0; }
.voucher-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.amount { font-size: 24px; font-weight: 700; }
.ttl { color: var(--ok); font-size: 13px; font-variant-numeric: tabular-nums; }
.ttl.expired { color: var(--bad); }
.tag { color: var(--dim); font-size: 13px; align-self: center; }

/* The QR sits on pure white with a wide quiet zone: a camera reading a screen
   needs the contrast, and a coloured surround is a common cause of a miss. */
canvas.qr {
  display: block; margin: 12px auto; background: #fff;
  border-radius: 8px; image-rendering: pixelated;
}

/* --- camera -------------------------------------------------------------- */
.scanner { position: relative; margin: 12px 0; }
video.camera {
  width: 100%; border-radius: 14px; background: #000; display: block;
  aspect-ratio: 3 / 4; object-fit: cover;
}
.reticle {
  position: absolute; inset: 15% 12%; border: 2px solid var(--gold);
  border-radius: 12px; pointer-events: none; opacity: .8;
}

/* --- evidence ------------------------------------------------------------ */
.evidence-block {
  margin: 12px 0; border: 1px solid var(--line); border-radius: 10px;
  background: #17140f;
}
.evidence-block > summary {
  padding: 10px 12px; font-size: 13px; font-weight: 600; color: var(--gold);
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  cursor: pointer;
}
.evidence-block > summary .copy {
  padding: 4px 8px; font-size: 11px; margin: 0; font-weight: 500;
}
table.evidence { width: 100%; border-collapse: collapse; font-size: 11px; }
table.evidence th, table.evidence td {
  text-align: left; vertical-align: top; padding: 5px 12px;
  border-top: 1px solid var(--line);
}
table.evidence th { color: var(--dim); font-weight: 500; width: 44%; }
table.evidence .value {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  word-break: break-all; user-select: all;
}

pre.raw {
  background: #17140f; border: 1px solid var(--line); border-radius: 10px;
  padding: 12px; font-size: 11px; overflow-x: auto; white-space: pre-wrap;
  word-break: break-word; color: var(--dim);
}

.status { padding: 10px 12px; border-radius: 10px; font-size: 14px; margin: 12px 0; }
.status.ok { background: rgba(95,191,127,.14); color: var(--ok); }
.status.warn { background: rgba(224,179,65,.14); color: var(--warn); }
.status.bad { background: rgba(226,104,95,.14); color: var(--bad); }

.list h2 { margin-top: 28px; }