.tool-main { max-width: 720px; }

h2.section-title { font-size: 1rem; color: var(--text-sub); margin-bottom: 1rem; font-weight: 600; }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 1.5rem;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}
.drop-zone.drag-over {
  border-color: var(--blue);
  background: rgba(59,130,246,0.05);
}
.drop-icon { font-size: 3rem; margin-bottom: 0.75rem; }
.drop-zone p { color: var(--text-sub); margin-bottom: 0.5rem; }
.drop-zone .drop-sub { font-size: 0.85rem; }
.drop-zone .drop-hint { font-size: 0.8rem; margin-top: 0.75rem; color: var(--text-sub); }
.drop-zone label.btn { margin-top: 0.5rem; cursor: pointer; }

.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1.5rem;
}
@media (max-width: 480px) { .options-grid { grid-template-columns: 1fr; } }

.check-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  color: var(--text);
  font-size: 0.95rem;
}
.check-group input[type="checkbox"] { width: auto; accent-color: var(--blue); }

.size-compare {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.size-item { text-align: center; flex: 1; min-width: 80px; }
.size-label { display: block; font-size: 0.8rem; color: var(--text-sub); margin-bottom: 0.25rem; }
.size-value { font-size: 1.2rem; font-weight: 700; }
#reduction-item .size-value { color: var(--green); }
.size-arrow { color: var(--text-sub); font-size: 1.25rem; }

.size-warning {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  border-radius: 6px;
  padding: 0.7rem 1rem;
  color: var(--red);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* 比較グリッド */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.compare-panel { display: flex; flex-direction: column; gap: 0.4rem; }
.compare-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-sub);
  text-align: center;
}
.compare-img-wrap {
  background: #f1f5f9;
  border-radius: 6px;
  padding: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  overflow: hidden;
}
.compare-img-wrap img {
  max-width: 100%;
  max-height: 280px;
  border-radius: 4px;
  display: block;
}
.compare-img-wrap img:not([src]) { display: none; }
.compare-meta {
  font-size: 0.75rem;
  color: var(--text-sub);
  text-align: center;
}

@media (max-width: 480px) {
  .comparison-grid { grid-template-columns: 1fr; }
}

html[data-theme="dark"] .compare-img-wrap { background: #0f172a; }
html[data-theme="dark"] .size-warning {
  background: #2d0f0f;
  border-color: #7c1a1a;
}