:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #667085;
  --border: #d9e0ee;
  --primary: #315efb;
  --primary-dark: #2547bd;
  --danger: #b42318;
  --success: #067647;
  --code: #101828;
  --shadow: 0 18px 50px rgba(16, 24, 40, 0.10);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(49, 94, 251, .15), transparent 32rem),
    linear-gradient(180deg, #fbfcff 0%, var(--bg) 100%);
  color: var(--text);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.page {
  width: min(1060px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin-bottom: 28px;
}

h1, h2, h3 { margin: 0; line-height: 1.1; }
h1 { font-size: clamp(34px, 6vw, 64px); letter-spacing: -0.055em; }
h2 { font-size: 24px; letter-spacing: -0.03em; }
h3 { font-size: 18px; }
p { color: var(--muted); line-height: 1.7; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid rgba(49, 94, 251, .18);
  border-radius: 999px;
  background: rgba(49, 94, 251, .07);
  color: #263f9b;
  font-weight: 700;
  font-size: 13px;
}

.card {
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.stack { display: grid; gap: 16px; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; align-items: center; justify-content: space-between; gap: 16px; }

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
  color: #344054;
}

textarea, input[type="text"], input[type="password"], input[type="file"], input[type="number"], select {
  width: 100%;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
  outline: none;
}
textarea:focus, input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(49, 94, 251, .12); }
textarea { min-height: 180px; resize: vertical; }

button, .button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  border: 0;
  border-radius: 16px;
  padding: 13px 18px;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition: .18s transform ease, .18s background ease, .18s opacity ease;
}
button:hover, .button:hover { transform: translateY(-1px); background: var(--primary-dark); text-decoration: none; }
button:disabled { opacity: .55; cursor: not-allowed; transform: none; }
button.secondary, .button.secondary { background: #eef2ff; color: #263f9b; }
button.secondary:hover, .button.secondary:hover { background: #dfe7ff; }
button.ghost { background: transparent; color: var(--primary); border: 1px solid var(--border); }
button.ghost:hover { background: #f7f9ff; }

.notice {
  border-radius: 18px;
  padding: 14px 16px;
  background: #f2f4f7;
  color: #344054;
  white-space: pre-wrap;
}
.notice.success { background: #ecfdf3; color: var(--success); }
.notice.error { background: #fef3f2; color: var(--danger); }

.code-list {
  display: grid;
  gap: 10px;
}
.code-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: #fff;
  padding: 14px;
}
.code {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-weight: 900;
  color: var(--code);
  word-break: break-all;
}
.muted { color: var(--muted); }
.small { font-size: 13px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { text-align: left; border-bottom: 1px solid var(--border); padding: 12px 10px; vertical-align: top; }
th { color: #475467; font-size: 13px; }
.status {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 12px;
  font-weight: 800;
}
.status.available { background: #ecfdf3; color: var(--success); }
.status.redeemed { background: #fff6ed; color: #b54708; }

.footer { margin-top: 28px; color: var(--muted); }

.filter-bar {
  display: grid;
  grid-template-columns: repeat(3, minmax(160px, 1fr)) auto;
  gap: 12px;
  align-items: end;
}

.summary-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.summary-card {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: #fff;
  padding: 14px;
}
.summary-card strong {
  display: block;
  font-size: 22px;
  letter-spacing: -0.03em;
}
.drop-hint {
  border: 1px dashed #9aa9ff;
  border-radius: 18px;
  background: #f8f9ff;
  padding: 12px 14px;
  color: #475467;
}

@media (max-width: 900px) {
  .filter-bar, .summary-strip { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .hero, .grid { grid-template-columns: 1fr; }
  .page { padding-top: 24px; }
  .card { border-radius: 22px; padding: 20px; }
}

.compact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.admin-actions { align-items: start; }
@media (max-width: 760px) { .compact-grid { grid-template-columns: 1fr; } }