:root {
  --primary: #1a5276;
  --light: #e9f4fb;
  --border: #cfd9e1;
  --text: #1f2933;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background: #f3f6f8;
  color: var(--text);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

h1 {
  margin: 0 0 16px;
  font-size: 1.5rem;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 14px;
}

h2 {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 1.1rem;
}

h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  position: relative;
}

.field-wide {
  grid-column: 1 / -1;
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 10px;
}

.suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 10;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  max-height: 220px;
  overflow: auto;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.suggestion-item {
  padding: 8px 10px;
  cursor: pointer;
}

.suggestion-item:hover {
  background: var(--light);
}

.hidden {
  display: none;
}

.upload-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.upload-group {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}

.dropzone {
  display: block;
  border: 2px dashed #8bb4cc;
  border-radius: 10px;
  padding: 18px;
  text-align: center;
  color: #4b6f82;
  cursor: pointer;
  margin-bottom: 10px;
}

.dropzone.dragover {
  background: #eef8ff;
}

.dropzone input {
  display: none;
}

.image-list {
  display: grid;
  gap: 8px;
}

.image-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  background: #fff;
}

.image-item[draggable="true"] {
  cursor: move;
}

.image-item.dragging {
  opacity: 0.45;
}

.image-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 6px;
  background: #f0f0f0;
}

.image-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 6px 0;
  gap: 6px;
}

.image-controls {
  display: flex;
  gap: 4px;
}

.image-controls button {
  border: 1px solid var(--border);
  background: #f8fbfd;
  border-radius: 6px;
  padding: 3px 7px;
  cursor: pointer;
}

.image-controls .danger {
  color: #b42318;
}

.pair-preview {
  display: grid;
  gap: 10px;
}

.pair-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.pair-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.pair-box img,
.no-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.no-image {
  background: #d9d9d9;
  color: #444;
  display: grid;
  place-items: center;
  font-weight: 600;
}

.pair-caption {
  padding: 8px;
  background: #f5f9fc;
  font-size: 0.9rem;
}

.actions {
  display: flex;
  justify-content: flex-end;
}

#generatePdfBtn {
  border: 0;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
}

#generatePdfBtn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

@media (max-width: 900px) {
  .grid,
  .upload-grid,
  .pair-row {
    grid-template-columns: 1fr;
  }
}