:root {
  --bg: #f6f5f1;
  --card: #ffffff;
  --text: #1d2129;
  --muted: #5b6470;
  --line: #e4e7ec;
  --on: #0a7a3d;
  --off: #8f1d1d;
  --accent: #1f5ad2;
  --love: #b0216a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at top right, #fff6fb 0%, var(--bg) 45%);
  color: var(--text);
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.hero {
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  font-weight: 600;
}

h1 {
  margin: 0 0 10px;
  line-height: 1.2;
}

h2 {
  margin-top: 0;
}

.lead {
  margin: 0;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  margin-top: 14px;
}

.muted {
  color: var(--muted);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 12px 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
}

label {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 4px;
}

code {
  font-size: 14px;
  font-weight: 600;
}

.list {
  margin: 0;
  padding-left: 18px;
}

.list li {
  margin-bottom: 8px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  border: 0;
  border-radius: 10px;
  padding: 11px 14px;
  cursor: pointer;
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn.secondary {
  background: var(--accent);
}

.btn.on {
  background: var(--on);
}

.btn.off {
  background: var(--off);
}

.btn.love {
  background: var(--love);
}

.hint {
  color: var(--muted);
  font-size: 13px;
  margin-top: 10px;
}

.love-note {
  background: linear-gradient(135deg, #fff4fa, #fff);
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.qr-grid.single {
  grid-template-columns: minmax(220px, 280px);
}

.qr-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: #fcfcff;
}

.qr-card h3 {
  margin: 0 0 8px;
  font-size: 14px;
}

.qr-card img {
  width: 170px;
  height: 170px;
  object-fit: contain;
  display: block;
}

@media (max-width: 640px) {
  .row {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn {
    width: 100%;
  }
}