:root {
  --ink: #1f1b18;
  --muted: #6f6760;
  --paper: #faf8f5;
  --card: #ffffff;
  --line: #e6e0d9;
  --accent: #1f1b18;
  --on-accent: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f2eee9;
    --muted: #a59d95;
    --paper: #161412;
    --card: #221f1c;
    --line: #36312c;
    --accent: #f2eee9;
    --on-accent: #161412;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
header {
  padding: calc(env(safe-area-inset-top) + 20px) 16px 8px;
  text-align: center;
}
.brand { letter-spacing: 0.25em; font-weight: 600; font-size: 15px; }
.subtitle { color: var(--muted); font-size: 14px; }
main {
  max-width: 560px;
  margin: 0 auto;
  padding: 8px 16px calc(env(safe-area-inset-bottom) + 24px);
}
section { display: flex; flex-direction: column; gap: 12px; }
section[hidden] { display: none; }
h1 { font-size: 22px; margin: 8px 0 4px; }
h2 { font-size: 15px; margin: 16px 0 4px; color: var(--muted); font-weight: 600; }
.hint { color: var(--muted); text-align: center; margin: 4px 0; }

button, a.primary { font: inherit; cursor: pointer; }
.primary, .secondary {
  display: block;
  width: 100%;
  min-height: 52px;
  padding: 14px;
  border-radius: 12px;
  text-align: center;
  text-decoration: none;
  font-weight: 600;
}
.primary { background: var(--accent); color: var(--on-accent); border: 0; }
.secondary { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.link { background: none; border: 0; color: var(--muted); text-decoration: underline; padding: 12px; }

.scan-button {
  margin: 12vh auto 8px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
}
.scan-button svg { width: 56px; height: 56px; fill: currentColor; }

#preview-image, .detail-image {
  width: 100%;
  max-height: 60vh;
  object-fit: contain;
  border-radius: 12px;
  background: var(--card);
}

#loading { align-items: center; padding-top: 25vh; color: var(--muted); }
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--line);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
#error { padding-top: 15vh; text-align: center; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.card {
  display: flex;
  flex-direction: column;
  text-align: left;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--ink);
  overflow: hidden;
}
.card img { width: 100%; aspect-ratio: 1; object-fit: cover; background: #fff; }
.card-title { padding: 8px 10px 0; font-size: 15px; line-height: 1.3; }
.card-price { padding: 4px 10px 10px; font-weight: 600; }

.price-large { font-size: 22px; font-weight: 600; margin: 0; }
.variants {
  display: grid;
  grid-template-columns: 1fr auto;
  margin: 0 0 8px;
  border-top: 1px solid var(--line);
}
.variants dt, .variants dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--line); }
.variants dd { text-align: right; font-weight: 600; padding-left: 16px; }

.logout { margin: 24px auto 0; font-size: 14px; }
.login { display: flex; flex-direction: column; gap: 12px; padding-top: 12vh; }
.login label { font-weight: 600; }
.login input {
  font: inherit;
  min-height: 52px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--ink);
}
.error { color: #c0392b; margin: 0; }
#nomatch { padding-top: 15vh; text-align: center; }