:root {
  --bg: #faf9f7;
  --fg: #2b2b2b;
  --accent: #b5532f;
  --border: #e2ddd5;
  --ok: #2e7d32;
  --err: #c62828;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Hiragino Kaku Gothic ProN", sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.7;
}
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: #fff;
}
.site-header h1 { font-size: 1.15rem; margin: 0; }
main { max-width: 920px; margin: 0 auto; padding: 1.5rem; }
.lead { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 1rem; }
code { background: #f0ece4; padding: 0.1em 0.4em; border-radius: 4px; }

.slots { display: grid; gap: 1.5rem; margin: 1.5rem 0; }
@media (min-width: 720px) { .slots { grid-template-columns: 1fr 1fr; } }
.slot { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 1rem; }
.slot h2 { font-size: 1rem; margin: 0 0 0.75rem; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.compare figure { margin: 0; }
.compare figcaption { font-size: 0.8rem; color: #777; margin-bottom: 0.25rem; }
.compare img {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #f4f1ea;
  display: block;
  min-height: 80px;
}
.compare img.placeholder { opacity: 0.35; }
input[type="file"] { margin-top: 0.75rem; width: 100%; }

button {
  font: inherit;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
}
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.primary:disabled { opacity: 0.5; cursor: not-allowed; }
.note { font-size: 0.85rem; color: #777; }

.status { margin-top: 1rem; padding: 1rem; border-radius: 8px; border: 1px solid var(--border); background: #fff; }
.status.ok { border-color: var(--ok); }
.status.err { border-color: var(--err); }
.status a { color: var(--accent); }
.spinner {
  display: inline-block; width: 1em; height: 1em; vertical-align: -0.15em;
  border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }