:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1f2a44;
  --muted: #667085;
  --primary: #0b5ed7;
  --ok: #1e8e3e;
  --warn: #b26a00;
  --bad: #c62828;
  --border: #d9dde3;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }

header { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; }
.brand { font-weight: 700; }
.brand span { color: var(--muted); font-weight: 400; margin-left: 6px; }
.who { color: var(--muted); font-size: 15px; }
.link { background: none; border: none; color: var(--primary); font-size: 15px; padding: 4px 6px; }

main { max-width: 640px; margin: 0 auto; padding: 16px 16px 96px; }
h1 { font-size: 24px; margin: 8px 0 16px; }
h2 { font-size: 18px; margin: 24px 0 8px; }
.hidden { display: none !important; }

form, .card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
label { display: block; margin-bottom: 12px; color: var(--muted); font-size: 15px; }
input { display: block; width: 100%; margin-top: 4px; padding: 14px; font-size: 18px; border: 1px solid var(--border); border-radius: 10px; color: var(--text); }
input.code { font-size: 32px; letter-spacing: 0.25em; text-transform: uppercase; text-align: center; font-family: ui-monospace, Consolas, monospace; }

button, .button { display: inline-block; min-height: 52px; padding: 14px 18px; font-size: 17px; border-radius: 10px; border: 1px solid var(--border); background: var(--card); color: var(--text); text-decoration: none; text-align: center; cursor: pointer; }
button.primary, .button.primary { background: var(--primary); border-color: var(--primary); color: #fff; width: 100%; font-weight: 600; }
button.ok { background: var(--ok); border-color: var(--ok); color: #fff; width: 100%; font-weight: 600; font-size: 20px; min-height: 64px; }
button:disabled { opacity: 0.5; }
.row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.row .button { flex: 1 1 45%; }

.error { color: var(--bad); min-height: 1.2em; margin: 8px 0 0; }
.muted { color: var(--muted); }

.card { margin-top: 16px; }
.card .status { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.card .status.ok { color: var(--ok); }
.card .status.warn { color: var(--warn); }
.card .status.bad { color: var(--bad); }
.card dl { display: grid; grid-template-columns: 1fr 2fr; gap: 6px 12px; margin: 0 0 12px; }
.card dt { color: var(--muted); }
.card dd { margin: 0; font-weight: 600; }
.card .code { font-family: ui-monospace, Consolas, monospace; font-size: 28px; letter-spacing: 0.2em; }

.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 12px 0; }
.tile { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px; }
.tile .n { font-size: 28px; font-weight: 700; }
.tile .l { color: var(--muted); font-size: 14px; }
.tile.wide { grid-column: 1 / -1; }
.tile table { width: 100%; border-collapse: collapse; font-size: 15px; }
.tile td { padding: 3px 0; border-bottom: 1px solid var(--border); }
.tile td:last-child { text-align: right; font-weight: 600; }

nav { position: fixed; bottom: 0; left: 0; right: 0; display: flex; background: var(--card); border-top: 1px solid var(--border); }
nav button { flex: 1; border: none; border-radius: 0; min-height: 60px; color: var(--muted); }
nav button.active { color: var(--primary); font-weight: 700; box-shadow: inset 0 3px 0 var(--primary); }

.filters { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 16px 4px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.chip { min-height: 44px; padding: 8px 14px; border-radius: 22px; font-size: 15px; }
.chip b { display: inline-block; min-width: 1.6em; margin-left: 4px; padding: 0 6px; border-radius: 10px; background: var(--bg); font-size: 13px; }
.chip.active { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 600; }
.chip.active b { background: rgba(255, 255, 255, 0.25); }
label.check { display: flex; align-items: center; gap: 10px; color: var(--text); }
label.check input { display: inline-block; width: 22px; height: 22px; margin: 0; padding: 0; }
#w-message { margin: 12px 2px; font-size: 14px; }

.winner { background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--primary); border-radius: 12px; padding: 14px 16px; margin-bottom: 10px; }
.winner.validated { border-left-color: var(--ok); }
.winner.duplicate { border-left-color: var(--bad); }
.w-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: 19px; }
.w-line { margin-top: 4px; font-size: 15px; overflow-wrap: anywhere; }
.w-code { font-family: ui-monospace, Consolas, monospace; letter-spacing: 0.12em; color: var(--text); font-weight: 600; }
.winner button.ok { margin-top: 12px; min-height: 52px; font-size: 17px; }
.winner .status { margin-top: 10px; font-weight: 600; font-size: 15px; }
.winner .status.ok { color: var(--ok); }
.winner .status.bad { color: var(--bad); }
.badge { flex: none; padding: 2px 10px; border-radius: 12px; font-size: 13px; font-weight: 600; background: var(--bg); color: var(--muted); }
.badge.highlight { background: #fff4d6; color: var(--warn); }

#wa-qr { text-align: center; }
#wa-qr img { width: 100%; max-width: 320px; height: auto; image-rendering: pixelated; }
#wa-admin, #wa-test { margin-top: 12px; }
#wa-counts { grid-template-columns: repeat(4, 1fr); }
#wa-conn .warn { color: var(--warn); font-weight: 600; }
#wa-list { width: 100%; border-collapse: collapse; margin: 12px 0 80px; font-size: 14px; }
#wa-list th, #wa-list td { padding: 6px 4px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
#wa-list th { color: var(--muted); font-weight: 600; }
@media (max-width: 480px) { #wa-counts { grid-template-columns: repeat(2, 1fr); } }