/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:       #7c3aed;
  --primary-dark:  #6d28d9;
  --primary-light: #ede9fe;
  --danger:        #dc2626;
  --danger-light:  #fef2f2;
  --gray-50:       #f9fafb;
  --gray-100:      #f3f4f6;
  --gray-200:      #e5e7eb;
  --gray-300:      #d1d5db;
  --gray-400:      #9ca3af;
  --gray-500:      #6b7280;
  --gray-700:      #374151;
  --gray-800:      #1f2937;
  --gray-900:      #111827;
  --radius:        8px;
  --radius-lg:     12px;
  --shadow:        0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:     0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --transition:    .15s ease;
}

html { font-size: 15px; }
body {
  font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', 'Yu Gothic UI', sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ─────────────────────────────────────────────── */
.header {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  padding: 14px 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner { display: flex; align-items: center; gap: 16px; max-width: 1200px; margin: 0 auto; width: 100%; }
.logo {
  display: flex; align-items: center; gap: 8px;
  color: var(--primary); font-size: 1.15rem; font-weight: 700;
}
.logo svg { flex-shrink: 0; }
.subtitle { color: var(--gray-500); font-size: .85rem; }

/* ── Main layout ─────────────────────────────────────────── */
.main {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
  padding: 20px 24px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  flex: 1;
  align-items: start;
}

/* ── Panel ──────────────────────────────────────────────── */
.panel {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px 0;
}
.panel-title { font-size: .95rem; font-weight: 600; color: var(--gray-700); }
.stats { font-size: .82rem; color: var(--gray-500); }

/* ── Drop zone ───────────────────────────────────────────── */
.drop-zone {
  padding: 16px 18px;
  display: none; /* shown via JS when list is empty */
}
.drop-zone.visible { display: block; }
.drop-zone-inner {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 40px 20px;
  text-align: center;
  transition: border-color var(--transition), background var(--transition);
  cursor: pointer;
}
.drop-zone-inner:hover,
.drop-zone.dragging .drop-zone-inner {
  border-color: var(--primary);
  background: var(--primary-light);
}
.drop-icon {
  width: 48px; height: 48px;
  color: var(--gray-400);
  margin: 0 auto 12px;
  display: block;
}
.drop-zone.dragging .drop-icon { color: var(--primary); }
.drop-text { font-size: .95rem; font-weight: 500; color: var(--gray-700); margin-bottom: 4px; }
.drop-sub  { font-size: .82rem; color: var(--gray-400); margin-bottom: 10px; }
.drop-formats { font-size: .78rem; color: var(--gray-400); margin-top: 10px; }

/* ── Image list ──────────────────────────────────────────── */
.image-list {
  list-style: none;
  padding: 4px 0 8px;
  min-height: 0;
}
.image-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--gray-100);
  transition: background var(--transition);
  cursor: grab;
  user-select: none;
}
.image-item:last-child { border-bottom: none; }
.image-item:hover { background: var(--gray-50); }
.image-item.dragging-item { opacity: .4; background: var(--primary-light); }
.image-item.drag-over { background: var(--primary-light); border-color: var(--primary); }

.item-number {
  width: 22px; text-align: center;
  font-size: .78rem; font-weight: 600; color: var(--gray-400);
  flex-shrink: 0;
}
.item-thumb {
  width: 44px; height: 44px; object-fit: cover;
  border-radius: 4px; border: 1px solid var(--gray-200);
  flex-shrink: 0; background: var(--gray-100);
}
.item-info { flex: 1; min-width: 0; }
.item-name {
  font-size: .85rem; font-weight: 500; color: var(--gray-800);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.item-size { font-size: .75rem; color: var(--gray-400); margin-top: 2px; }

.item-actions { display: flex; align-items: center; gap: 2px; flex-shrink: 0; }
.icon-btn {
  width: 28px; height: 28px; border: none; background: transparent;
  border-radius: 4px; cursor: pointer; display: flex; align-items: center; justify-content: center;
  color: var(--gray-400); transition: background var(--transition), color var(--transition);
}
.icon-btn:hover { background: var(--gray-100); color: var(--gray-700); }
.icon-btn:disabled { opacity: .3; cursor: not-allowed; }
.icon-btn.delete:hover { background: var(--danger-light); color: var(--danger); }

/* ── Add more row ────────────────────────────────────────── */
.add-more {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  border-top: 1px solid var(--gray-100);
}

/* ── Right panel cards ───────────────────────────────────── */
.panel-right { display: flex; flex-direction: column; gap: 0; }
.settings-card, .actions-card {
  padding: 16px 18px;
}
.settings-card { border-bottom: 1px solid var(--gray-200); }

.setting-group { margin-top: 14px; }
.setting-label { display: block; font-size: .82rem; font-weight: 600; color: var(--gray-500); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .03em; }

.select {
  width: 100%; padding: 8px 10px;
  border: 1px solid var(--gray-300); border-radius: var(--radius);
  background: #fff; font-size: .9rem; color: var(--gray-800);
  cursor: pointer; transition: border-color var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}
.select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(124,58,237,.15); }

.radio-group { display: flex; gap: 8px; flex-wrap: wrap; }
.radio-label {
  display: flex; align-items: center; gap: 5px;
  font-size: .88rem; color: var(--gray-700); cursor: pointer;
  padding: 6px 10px; border: 1px solid var(--gray-300); border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition);
}
.radio-label:has(input:checked) {
  border-color: var(--primary); background: var(--primary-light); color: var(--primary);
}
.radio-label input { display: none; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: var(--radius); border: none;
  font-size: .88rem; font-weight: 500; cursor: pointer;
  transition: background var(--transition), color var(--transition), opacity var(--transition);
  text-decoration: none; white-space: nowrap;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-full { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: .82rem; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }

.btn-secondary { background: var(--gray-800); color: #fff; }
.btn-secondary:hover:not(:disabled) { background: var(--gray-900); }

.btn-outline {
  background: transparent; color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-light); }

.btn-ghost {
  background: var(--gray-100); color: var(--gray-700); border: 1px solid var(--gray-200);
}
.btn-ghost:hover:not(:disabled) { background: var(--gray-200); }

.btn-danger { color: var(--danger); }
.btn-danger:hover { background: var(--danger-light) !important; }

.actions-card .btn + .btn { margin-top: 8px; }

/* ── Status message ──────────────────────────────────────── */
.status-message {
  margin-top: 10px; padding: 8px 12px;
  border-radius: var(--radius); font-size: .84rem; font-weight: 500;
  display: none;
}
.status-message.show { display: block; }
.status-message.success { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }
.status-message.error   { background: var(--danger-light); color: var(--danger); border: 1px solid #fecaca; }
.status-message.loading { background: var(--primary-light); color: var(--primary); border: 1px solid #c4b5fd; }

/* ── Print styles ────────────────────────────────────────── */
.print-area { display: none; }

@media print {
  body > * { display: none !important; }
  .print-area {
    display: block !important;
  }
  .print-area img {
    display: block;
    width: 100%;
    height: 100vh;
    object-fit: contain;
    page-break-after: always;
  }
  .print-area img:last-child { page-break-after: auto; }
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 720px) {
  .main { grid-template-columns: 1fr; padding: 12px; }
  .header-inner { flex-wrap: wrap; gap: 4px; }
}

/* ===== 関連ツールセクション ===== */
.related-tools {
  margin: 3rem auto;
  padding: 1.5rem;
  max-width: 900px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  text-align: center;
}
.related-tools h2 { font-size: 1.4rem; margin-bottom: 0.8rem; color: var(--primary); }
.related-tools p { color: #555; margin-bottom: 1rem; }
.tool-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; margin-bottom: 1rem; }
.tool-card {
  display: inline-block; padding: 0.8rem 1.2rem;
  background: var(--primary-light); border: 1px solid var(--primary);
  border-radius: 10px; text-decoration: none; color: var(--primary);
  font-weight: 500; transition: all 0.2s;
}
.tool-card:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.more-tools a { color: var(--primary); text-decoration: none; }
.more-tools a:hover { text-decoration: underline; }
footer {
  text-align: center; padding: 1.5rem 0;
  background-color: #f1f5f9; color: #555;
  font-size: 0.9rem; border-top: 1px solid #e2e8f0; margin-top: 2rem;
}
.footer-nav a { color: var(--primary); text-decoration: none; margin: 0 0.5rem; }
.footer-nav a:hover { text-decoration: underline; }