:root {
  --bg: #0f1419; --card: #1a2129; --fg: #e8edf2; --muted: #8b98a8;
  --accent: #2f8f5b; --accent-fg: #fff; --danger: #d9534f; --warn: #e0a326; --border: #2b3542;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.45 -apple-system, system-ui, "Segoe UI", Roboto, sans-serif; }
body { min-height: 100dvh; display: flex; flex-direction: column; }
header { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--card); }
header h1 { font-size: 17px; margin: 0; }
header .user { font-size: 13px; color: var(--muted); display: flex; gap: 10px; align-items: center; }
main { flex: 1; padding: 16px; max-width: 720px; width: 100%; margin: 0 auto; }
.screen[hidden] { display: none !important; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; margin-bottom: 14px; }
h2 { margin: 0 0 12px; font-size: 20px; }
p { margin: 8px 0; }
.muted { color: var(--muted); font-size: 14px; }
label { display: block; font-size: 14px; color: var(--muted); margin: 12px 0 4px; }
input, select, textarea { width: 100%; padding: 12px; font-size: 16px; border-radius: 8px; border: 1px solid var(--border); background: #0f151b; color: var(--fg); }
input:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
button, .btn { display: inline-block; width: 100%; padding: 14px 18px; margin-top: 14px; font-size: 17px; font-weight: 600; border: 0; border-radius: 10px; background: var(--accent); color: var(--accent-fg); cursor: pointer; text-align: center; text-decoration: none; }
button.secondary { background: #2b3542; color: var(--fg); }
button.small { width: auto; padding: 8px 12px; font-size: 14px; margin: 0; }
button:disabled { opacity: .5; cursor: default; }
.error { color: var(--danger); font-weight: 600; }
.ok { color: var(--accent); font-weight: 600; }
.warn { color: var(--warn); }
.banner { padding: 12px 14px; border-radius: 10px; margin-bottom: 14px; font-weight: 600; }
.banner.ok { background: rgba(47,143,91,.15); border: 1px solid var(--accent); }
.banner.error { background: rgba(217,83,79,.15); border: 1px solid var(--danger); }
.banner.info { background: rgba(224,163,38,.12); border: 1px solid var(--warn); color: var(--fg); }
#video-wrap { position: relative; width: 100%; aspect-ratio: 1 / 1; background: #000; border-radius: 12px; overflow: hidden; }
#video { width: 100%; height: 100%; object-fit: cover; }
#video-wrap .frame { position: absolute; inset: 12%; border: 3px solid rgba(255,255,255,.7); border-radius: 14px; pointer-events: none; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; margin: 10px 0; }
dt { color: var(--muted); }
dd { margin: 0; word-break: break-all; }
.big { font-size: 26px; font-weight: 700; }
.steps li { margin: 4px 0; }
.steps .done { color: var(--accent); }
.steps .active { font-weight: 700; }
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--muted); border-top-color: var(--fg); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: middle; margin-right: 8px; }
@keyframes spin { to { transform: rotate(360deg); } }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.qr-preview { background: #fff; padding: 12px; border-radius: 10px; display: inline-block; }
.qr-preview img { width: 240px; height: 240px; display: block; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row > * { flex: 1; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.tag.open { background: rgba(47,143,91,.2); color: #6fd39a; }
.tag.redeemed { background: rgba(139,152,168,.2); color: var(--muted); }
code { background: #0f151b; padding: 2px 6px; border-radius: 4px; font-size: 13px; }
a { color: #6fb3ff; }
.table-wrap { overflow-x: auto; }