:root {
  --bg: #0b0e14;
  --panel: #111622;
  --panel-2: #0f1320;
  --text: #e6eaf2;
  --muted: #9aa3b2;
  --accent: #4f8cff;
  --accent-2: #62d29d;
  --border: #1f2433;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 20% -10%, #172037 0%, rgba(23,32,55,0) 60%),
             radial-gradient(1000px 500px at 120% 0%, #1a253f 0%, rgba(26,37,63,0) 60%),
             var(--bg);
}

.app-header, .app-footer {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(0deg, rgba(10,12,20,0.5), rgba(10,12,20,0.5)), var(--panel);
}
.app-footer { border-top: 1px solid var(--border); border-bottom: none; }

.app-header h1 { margin: 0; font-size: 20px; letter-spacing: .5px; }
.subtitle { margin: 4px 0 0; color: var(--muted); font-size: 12px; }

.container { padding: 20px; }

.toolbar { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; }
.toolbar input[type="search"] {
  flex: 1; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text);
}
.toolbar .spacer { flex: 0 0 12px; }

button { cursor: pointer; border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; color: var(--text); background: var(--panel-2); }
button.primary { background: linear-gradient(0deg, rgba(79,140,255,.15), rgba(79,140,255,.15)), var(--panel-2); border-color: #2c3d6b; }
button.secondary { background: linear-gradient(0deg, rgba(154,163,178,.12), rgba(154,163,178,.12)), var(--panel-2); }
button:disabled { opacity: .6; cursor: not-allowed; }

.layout { display: grid; grid-template-columns: 1fr 360px; gap: 16px; align-items: start; }
.left, .right { background: linear-gradient(0deg, rgba(17,22,34,.6), rgba(17,22,34,.6)), var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 12px; }
.left h2, .right h2 { margin: 4px 6px 12px; font-size: 14px; color: var(--muted); font-weight: 600; }

.list { display: grid; gap: 10px; }
.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: linear-gradient(0deg, rgba(15,19,32,.85), rgba(15,19,32,.85)), var(--panel-2);
  padding: 12px;
}
.row { display: flex; gap: 8px; align-items: center; justify-content: space-between; }
.meta { color: var(--muted); font-size: 12px; }
.title { font-size: 14px; margin: 4px 0 8px; line-height: 1.5; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font-size: 11px; color: var(--accent-2); background: rgba(98,210,157,.12); border: 1px solid rgba(98,210,157,.35); padding: 2px 6px; border-radius: 999px; }

.card .actions { display: flex; gap: 8px; }
.card .actions button { padding: 6px 10px; font-size: 12px; }
.card .actions .danger { background: linear-gradient(0deg, rgba(255,87,87,.12), rgba(255,87,87,.12)), var(--panel-2); border-color: #5a2b2b; }

.card .body, .card .answer { white-space: pre-wrap; line-height: 1.7; }
.card .answer { background: rgba(98,210,157,.08); padding: 8px; border-radius: 6px; font-size: 13px; }

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
}

/* 印刷用: 余計なUIを隠す */
@media print {
  .app-header, .toolbar, .right, .app-footer { display: none; }
  body { background: #fff; color: #000; }
  .left { border: none; padding: 0; }
  .card { break-inside: avoid; border: 1px solid #ccc; background: #fff; }
}

/* モーダル */
dialog.modal {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  padding: 16px;
  width: min(720px, 92vw);
}
dialog.modal::backdrop { background: rgba(0,0,0,.5); }
dialog.modal form { display: grid; gap: 10px; }
dialog.modal label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
dialog.modal input, dialog.modal textarea, dialog.modal select {
  padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text);
}

dialog.modal textarea {
  width: 100%;
  resize: vertical;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

/* モーダルを広く・高く（編集/追加） */
.modal--wide { width: 96vw !important; max-width: 1280px !important; height: 86vh; }
.modal--wide form { min-height: 80vh; }

/* Typst UI snippet layout with pagination */
.typst-snippet { display: inline-block; margin: 1.25em 0; position: relative; }
.typst-snippet canvas { width: auto; height: auto; max-width: 100%; display: block; }

/* Multi-page Typst snippet */
.typst-snippet.multi-page { border: 1px solid var(--border); border-radius: 8px; padding: 8px; background: var(--panel-2); }
.typst-snippet.multi-page .page-container { position: relative; min-height: 200px; }
.typst-snippet.multi-page .page { display: none; }
.typst-snippet.multi-page .page.active { display: block; }
.typst-snippet.multi-page .pagination { display: flex; gap: 4px; align-items: center; justify-content: center; margin-top: 8px; }
.typst-snippet.multi-page .pagination button { padding: 4px 8px; font-size: 12px; border: 1px solid var(--border); border-radius: 4px; background: var(--panel); color: var(--text); cursor: pointer; }
.typst-snippet.multi-page .pagination button:hover { background: var(--panel-2); }
.typst-snippet.multi-page .pagination button.active { background: var(--accent); color: white; border-color: var(--accent); }
.typst-snippet.multi-page .pagination button:disabled { opacity: 0.5; cursor: not-allowed; }
.typst-snippet.multi-page .page-info { font-size: 11px; color: var(--muted); margin: 0 8px; }

/* Playground */
dialog.playground { width: 96vw; max-width: 1200px; height: 86vh; }
dialog.playground .pg-body { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; height: calc(86vh - 64px); }
dialog.playground .pg-left, dialog.playground .pg-right { height: 100%; }
dialog.playground .pg-left { display: grid; grid-template-rows: 200px 1fr; gap: 8px; }
dialog.playground #pg-tree { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 8px; overflow: auto; font-size: 12px; }
dialog.playground #pg-tree .dir { font-weight: 600; margin-top: 6px; }
dialog.playground #pg-tree .file { cursor: pointer; padding: 2px 4px; border-radius: 4px; }
dialog.playground #pg-tree .file:hover { background: rgba(154,163,178,.12); }
dialog.playground #typst-src { width: 100%; height: 100%; resize: none; background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 8px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace; font-size: 13px; line-height: 1.5; padding: 10px; }
dialog.playground .pg-preview { width: 100%; height: 100%; overflow: auto; border: 1px solid var(--border); border-radius: 8px; background: #fff; padding: 8px; }

/* Editor with Preview（左右2ペイン） */
.editor-with-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 8px 0 4px;
  min-height: 400px;
  max-height: 600px;
}

.editor-section { 
  display: flex; 
  flex-direction: column; 
  gap: 12px; 
}

.editor-section textarea {
  min-height: 150px;
  flex-grow: 1;
}

.preview-section { 
  display: flex; 
  flex-direction: column; 
  gap: 8px; 
  min-height: 100%;
}

.preview-section h4 { 
  margin: 0; 
  font-size: 14px; 
  color: var(--muted); 
}

.preview-area {
  min-height: 160px;
  padding: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--text);
  overflow-y: auto;
  flex: 1;
}

/* 編集モーダル内のプレビューエリア用の追加スタイル */
.editor-with-preview .preview-area {
  max-height: 500px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--muted) var(--panel);
}

/* WebKitブラウザ用スクロールバースタイル */
.editor-with-preview .preview-area::-webkit-scrollbar {
  width: 8px;
}

.editor-with-preview .preview-area::-webkit-scrollbar-track {
  background: var(--panel);
  border-radius: 4px;
}

.editor-with-preview .preview-area::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 4px;
}

.editor-with-preview .preview-area::-webkit-scrollbar-thumb:hover {
  background: var(--text);
}
.preview-area:empty:before {
  content: attr(data-placeholder);
  color: var(--muted);
  font-style: italic;
}

/* Typst snippet in previews */
.preview-area .typst-snippet { display: inline-block; margin: 4px 0; }
.preview-area .typst-snippet canvas { max-width: 100%; height: auto; }

/* 編集モーダル内のTypstスニペット調整 */
.editor-with-preview .preview-area .typst-snippet {
  display: block;
  margin: 8px 0;
  max-width: 100%;
}

.editor-with-preview .preview-area .typst-snippet canvas {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 複数ページのTypstスニペットはプレビューエリア内でもページネーションを有効に */
.editor-with-preview .preview-area .typst-snippet.multi-page {
  max-width: 100%;
}

/* 必須項目のアスタリスク */
.required {
  color: #e53e3e;
  font-weight: bold;
  font-size: 0.9em;
  vertical-align: super;
  margin-left: 2px;
}

/* セレクトボックスのスタイル */
select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
  font-size: inherit;
}

/* 問題情報の表示スタイル */
.problem-info {
  display: flex;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--muted);
  flex-wrap: wrap;
}

.problem-info span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  background: rgba(154,163,178,0.1);
  border-radius: 4px;
  white-space: nowrap;
}

/* レスポンシブ対応 */
@media (max-width: 600px) {
  .problem-info {
    gap: 8px;
  }
  
  .problem-info span {
    font-size: 11px;
    padding: 1px 4px;
  }
}

/* 編集モーダルの新しいレイアウト */
.edit-section {
  margin-bottom: 16px;
  padding: 16px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.edit-section.collapsed {
  padding: 12px 16px;
}

.edit-section.collapsed > *:not(.section-header) {
  display: none;
}

.section-header {
  margin: 0 0 12px 0;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.section-header:hover {
  color: var(--text);
}

.toggle-arrow {
  font-family: monospace;
  font-size: 16px;
  width: 16px;
  text-align: center;
  transition: transform 0.2s ease;
}

.edit-section.collapsed .toggle-arrow {
  transform: rotate(-90deg);
}

.edit-section textarea {
  width: 100%;
  min-height: 150px;
}

.edit-section .preview-pane {
  min-height: 120px;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--text);
}

/* 画像アップロードセクション */
.image-upload-section {
  margin: 16px 0;
  padding: 12px;
  background: rgba(0,0,0,0.1);
  border-radius: 6px;
  border: 1px solid var(--border);
}

.image-upload-section h5 {
  margin: 0 0 8px 0;
  font-size: 14px;
  color: var(--muted);
}

.uploaded-images-list {
  max-height: 200px;
  overflow-y: auto;
}

.uploaded-image-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  margin-bottom: 8px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.uploaded-image-item img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 4px;
}

.image-url {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.image-url code {
  background: rgba(79,140,255,0.1);
  padding: 4px 8px;
  border-radius: 3px;
  font-size: 12px;
  font-family: 'Courier New', monospace;
  word-break: break-all;
  color: var(--accent);
}

.image-url small {
  color: var(--muted);
  font-size: 11px;
}

.copy-btn, .delete-btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 16px;
  color: var(--text);
}

.copy-btn:hover {
  background: rgba(79,140,255,0.2);
  border-color: var(--accent);
}

.delete-btn:hover {
  background: rgba(255,87,87,0.2);
  border-color: #ff5757;
}

/* ローディングスピナー */
.loading-spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-radius: 50%;
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
  margin-right: 8px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-loading {
  opacity: 0.7;
  pointer-events: none;
}

/* Helpers */
.muted{ color: var(--muted); }
[hidden]{ display: none !important; }