:root {
  --bg0: #1a1208;
  --bg1: #2a1c0c;
  --card: rgba(255, 248, 235, 0.96);
  --ink: #1c140c;
  --muted: #6b5744;
  --accent: #ffc107;
  --line: rgba(28, 20, 12, 0.12);
  --ok: #1f7a4c;
  --bad: #b42318;
  --radius: 18px;
  --font: "Noto Sans SC", "DM Sans", system-ui, sans-serif;
  --display: "DM Sans", "Noto Sans SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg0);
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 10% -10%, #ffb70366, transparent 60%),
    radial-gradient(700px 420px at 100% 0%, #fb850055, transparent 55%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 55%, #120c06);
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.25rem;
  max-width: 760px;
  margin: 0 auto;
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.35rem;
  color: #fff8e7;
}
.badge {
  font-size: 0.8rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  color: #fff8e7;
  background: #ffffff22;
}
.badge.ok { background: #1f7a4ccc; }
.badge.muted { background: #ffffff22; }
.badge.busy { background: #c2410ccc; }

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0.5rem 1rem 3rem;
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.25rem 1.2rem 1.35rem;
  box-shadow: 0 18px 40px rgba(0,0,0,0.25);
}
.panel h2 {
  margin: 0 0 0.25rem;
  font-size: 1.15rem;
  font-family: var(--display);
}
.sub {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

/* 单一舞台：图标 / 二维码 / 已登录 */
.stage {
  min-height: 260px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  background: #fff;
  margin-bottom: 1rem;
  display: grid;
  place-items: center;
  padding: 1.25rem 1rem;
}
.stage.is-logged {
  border-style: solid;
  background: linear-gradient(180deg, #fff8e7, #e8f6ee);
}
.stage-inner {
  display: grid;
  justify-items: center;
  gap: 0.85rem;
  width: 100%;
}
.stage-caption {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.brand-mark {
  display: grid;
  justify-items: center;
  gap: 0.4rem;
}
.brand-mark-badge {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  font-family: var(--display);
  font-weight: 700;
  font-size: 2rem;
  color: #1c140c;
  background: linear-gradient(145deg, #ffe566, #ffc107 55%, #ff9800);
  box-shadow: 0 10px 24px rgba(255, 152, 0, 0.28);
}
.brand-mark-name {
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #9a3412;
  font-size: 0.95rem;
}
.brand-mark.lg .brand-mark-badge {
  width: 88px;
  height: 88px;
  font-size: 2.4rem;
  border-radius: 26px;
}

#qrImg,
#qrCanvas {
  width: min(200px, 64vw);
  height: auto;
  display: block;
  border-radius: 8px;
}

.logged-ok {
  margin: 0;
  color: var(--ok);
  font-weight: 700;
  font-size: 1.05rem;
}

.row { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.65rem 1.05rem;
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}
.btn.ghost { background: transparent; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.msg { min-height: 1.2em; margin: 0.75rem 0 0; font-size: 0.9rem; }
.msg.ok { color: var(--ok); }
.msg.err { color: var(--bad); }

.coupon-head {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.15rem;
}
.coupon-count {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 700;
}

.coupon-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
@media (max-width: 560px) {
  .coupon-grid { grid-template-columns: 1fr; }
}

.coupon-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.9rem 0.95rem;
  background: #fff;
  display: grid;
  gap: 0.35rem;
  min-height: 72px;
}
.coupon-card .name {
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.35;
  color: var(--ink);
}
.coupon-card .detail {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.4;
}
.coupon-card .tag {
  display: inline-block;
  width: fit-content;
  font-size: 0.72rem;
  color: #9a3412;
  background: #ffedd5;
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
}

.coupon-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--muted);
  padding: 1.5rem 0.5rem;
}

.foot {
  text-align: center;
  color: #fff6;
  font-size: 0.78rem;
  padding: 0 1rem 2rem;
}