* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC",
    "PingFang TC", "Heiti TC", "Microsoft JhengHei", Arial, sans-serif;
  background: #fafafa;
  color: #111;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 16px;
}

.h2 {
  margin: 18px 0 10px;
  font-size: 16px;
}

.list { display: grid; gap: 12px; }

/* ===== Topbar ===== */
.topbar{
  position: sticky;
  top: 0;
  z-index: 5;
  display:flex;
  justify-content: space-between;
  align-items:center;
  padding: 12px 16px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.brand{ font-weight:800; }

.topbar-actions{ display:flex; gap:8px; }

.chip{
  border:1px solid rgba(0,0,0,0.12);
  background:#fff;
  padding:8px 10px;
  border-radius:999px;
  cursor:pointer;
  font-size:14px;
}

.chip.active{
  background:#111;
  color:#fff;
  border-color:#111;
}

/* ===== Cards / Form ===== */
.card {
  background: #fff;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 16px;
  padding: 14px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.04);
}

.label { display:block; font-size: 12px; opacity: 0.7; margin: 10px 0 6px; }
.input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,0.12);
  outline: none;
}

.row2 { display:grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.primary-btn {
  margin-top: 14px;
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid #111;
  background: #111;
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

.hint {
  margin-top: 10px;
  font-size: 12px;
  opacity: 0.7;
  line-height: 1.4;
}

/* ===== Offer Items ===== */
.item {
  background: #fff;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 16px;
  padding: 12px;
  display:flex;
  justify-content: space-between;
  gap: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.04);
}

.item.expired {
  opacity: 0.55;
}

.item-main { min-width: 0; }
.title { font-weight: 800; }
.meta { margin-top: 6px; font-size: 12px; opacity: 0.75; line-height: 1.45; }
.offer-countdown {
  font-size: 13px;
  color: #6b7280;
  margin-top: 6px;
  opacity: 1;
}
.offer-countdown.urgent {
  color: #dc2626;
}
.muted { opacity: 0.75; font-weight: 600; }

.badge {
  font-size: 12px;
  border: 1px solid rgba(0,0,0,0.12);
  border-radius: 999px;
  padding: 6px 10px;
  height: fit-content;
  opacity: 0.85;
}

.btn {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,0.18);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 16px;
  background: #111;
  color: #fff;
  padding: 10px 12px;
  border-radius: 999px;
  font-size: 13px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.18);
}