:root {
  --bg:#0b0d12; --panel:#121622; --muted:#9aa3b2; --text:#e9eef7; --accent:#7aa2ff; --border:#23283a;
}
:root[data-theme="light"] {
  --bg:#f8fafc; --panel:#ffffff; --muted:#64748b; --text:#1e293b; --accent:#3b82f6; --border:#e2e8f0;
}
* { box-sizing:border-box; }
html,body { height:100%; }
body {
  margin:0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background:var(--bg); color:var(--text); transition:background-color 0.3s, color 0.3s;
}
body[data-theme="dark"] {
  background:linear-gradient(180deg, #0b0d12 0%, #0f1422 100%);
}
body[data-theme="light"] {
  background:linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
}
.container { width:min(1080px, 92%); margin:0 auto; }
.header { padding:20px 0; }

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.hero-content h1 { 
  margin:0 0 8px; 
  font-size:28px; 
  font-weight: 600;
  letter-spacing:0.2px; 
  text-align: center;
}
.hero-content .sub { 
  margin:0; 
  color:var(--muted); 
  text-align: center;
  font-size: 16px;
}
.grid { display:grid; grid-template-columns:1fr 1fr; grid-template-rows:auto auto 1fr auto; gap:16px; padding:16px 0 24px; }
.card {
  background:var(--panel); border:1px solid var(--border); border-radius:14px; padding:16px; box-shadow: 0 10px 24px rgba(0,0,0,.25);
}
.card h2 { margin:0 0 10px; font-size:18px; }
.row { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:10px; }
.label { display:block; margin-bottom:4px; color:var(--text); font-size:14px; }
.required { color:var(--accent); font-weight:600; font-size:12px; }
input, select, textarea, button {
  width:100%; padding:10px 12px; border-radius:10px; border:1px solid var(--border);
  background:var(--panel); color:var(--text); outline:none; transition:all 0.3s;
}
input::placeholder { color:var(--muted); }
button {
  background:linear-gradient(90deg, #5b7cff, #7aa2ff); color:white; border:none; cursor:pointer; font-weight:600;
}

.chatgpt-button {
  background: linear-gradient(90deg, #10a37f, #1eb382) !important;
  color: white !important;
  border: none !important;
  cursor: pointer !important;
  font-weight: 600 !important;
  text-decoration: none !important;
}

.chatgpt-button:hover {
  background: linear-gradient(90deg, #0d8566, #1a9972) !important;
  transform: translateY(-1px);
}

.chatgpt-container {
  display: flex;
  align-items: center;
  gap: 8px;
}

.recommend-note {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  white-space: nowrap;
}

.usage-guide-section {
  margin-top: 12px;
  text-align: center;
  width: 100%;
}

.usage-guide-image {
  margin-bottom: 8px;
}

.usage-guide-image a {
  display: inline-block;
  transition: all 0.3s;
}

.usage-guide-image img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all 0.3s;
}

.usage-guide-image a:hover img {
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.usage-guide-link a {
  display: inline-block;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 6px;
  transition: all 0.3s;
  border: 1px solid transparent;
}

.usage-guide-link a:hover {
  background: rgba(122, 162, 255, 0.1);
  border: 1px solid var(--accent);
  text-decoration: none;
}

#exportAnswersPdf {
  width: 200px !important;
  padding: 10px 20px !important;
  margin: 0 auto;
  display: block;
  cursor: pointer !important;
  pointer-events: auto !important;
  position: relative;
  z-index: 999;
}

#exportAnswersPdf:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* 比較ヘルプ用スタイル */
.comparison-help {
  margin-top: 20px;
}

.comparison-help h3 {
  margin: 0 0 16px;
  font-size: 16px;
  color: var(--text);
  text-align: center;
}

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

.comparison-card {
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: all 0.3s;
}

.ccc-card {
  border-color: #4CAF50;
}

.jcda-card {
  border-color: #FF9800;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.card-header h4 {
  margin: 0;
  font-size: 14px;
  color: var(--text);
}

.card-badge {
  background: var(--accent);
  color: white;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 10px;
  font-weight: 600;
}

.flow-steps {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 12px;
  overflow-x: auto;
}

.step {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 4px 6px;
  border-radius: 6px;
  font-size: 10px;
  color: var(--text);
  white-space: nowrap;
  flex-shrink: 0;
}

.arrow {
  color: var(--accent);
  font-weight: bold;
  font-size: 10px;
  flex-shrink: 0;
}

.key-point {
  background: rgba(122, 162, 255, 0.1);
  padding: 8px;
  border-radius: 6px;
  font-size: 11px;
  line-height: 1.4;
  color: var(--text);
}

/* 手動編集モードのヘルプ */
.edit-mode-help {
  margin: 10px 0;
  padding: 8px 12px;
  background: rgba(122, 162, 255, 0.1);
  border: 1px solid rgba(122, 162, 255, 0.3);
  border-radius: 6px;
  display: none;
}

.edit-mode .edit-mode-help {
  display: block;
}

.edit-mode-help p {
  margin: 0;
  font-size: 13px;
  line-height: 1.4;
  color: var(--text);
}

button:hover { filter:brightness(1.05); }
.actions { display:flex; gap:10px; flex-wrap:wrap; margin-top:10px; }
.output-card {
  grid-column: 1 / 3;
  grid-row: 2;
}
.questions-card {
  grid-column: 1 / 3;
  grid-row: 3;
}
.help-card {
  grid-column: 1;
  grid-row: 1;
}
.card:not(.help-card):not(.output-card):not(.questions-card) {
  grid-column: 2;
  grid-row: 1;
}
.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer !important;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  z-index: 9999 !important;
  position: relative;
  pointer-events: auto !important;
  flex-shrink: 0;
}
.theme-toggle:hover {
  background: var(--border);
}
.theme-icon {
  width: 20px;
  height: 20px;
  stroke: var(--text);
  transition: all 0.3s;
}
.preview {
  white-space:pre-wrap; background:var(--panel); border:1px dashed var(--border); border-radius:12px; padding:14px; min-height:500px; height:calc(100vh - 300px);
  display: block;
}

.preview-edit {
  display: none;
  width: 100%;
  min-height: 500px;
  height: calc(100vh - 300px);
  padding: 14px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  font-family: 'Courier New', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 14px;
  line-height: 1.4;
  resize: vertical;
  outline: none;
  transition: all 0.3s;
}

.preview-edit:focus {
  border-color: var(--accent);
}

.preview-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.preview-controls button {
  width: auto;
  padding: 8px 16px;
  font-size: 14px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}

.preview-controls button:hover {
  filter: brightness(1.1);
}

.preview-controls button.active {
  background: var(--muted);
}

/* 編集モード時の表示切り替え */
.edit-mode .preview {
  display: none;
}

.edit-mode .preview-edit {
  display: block;
}
.help { border:1px solid var(--border); border-radius:10px; padding:10px; background:var(--panel); }
.help summary { cursor:pointer; }
.help-content { color:var(--text); }
.muted { color:var(--muted); }
.footer { padding:8px 0 24px; color:var(--muted); text-align:center; }

.footer a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s;
}

.footer a:hover {
  color: var(--text);
  text-decoration: underline;
}

/* 使い方セクション */
.usage-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 25px;
}

.usage-step {
  display: flex;
  align-items: flex-start;
  gap: 15px;
}

.step-number {
  background: var(--accent);
  color: var(--panel);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 16px;
  flex-shrink: 0;
}

.step-content h4 {
  margin: 0 0 5px;
  font-size: 16px;
  color: var(--text);
}

.step-content p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.4;
}

.usage-tips {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 15px;
  margin-top: 20px;
}

.usage-tips h4 {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--text);
}

.usage-tips ul {
  margin: 0;
  padding-left: 20px;
}

.usage-tips li {
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--muted);
}

.usage-tips li:last-child {
  margin-bottom: 0;
}

.usage-tips strong {
  color: var(--accent);
}

.recommend-text {
  color: var(--accent);
  font-size: 11px;
  font-weight: 500;
  margin-left: 4px;
}

/* 共有ボタン */
.share-buttons {
  position: fixed;
  right: 20px;
  bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 1000;
}

.share-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all 0.3s ease;
  opacity: 0.6;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.share-btn:hover {
  opacity: 1;
  transform: scale(1.1);
}

.share-x {
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--border);
}

.share-line {
  background: #00C300;
  color: #fff;
}

.share-btn svg {
  width: 20px;
  height: 20px;
}

/* スマホ対応 */
@media (max-width: 768px) {
  .container {
    padding: 10px;
    max-width: 100%;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  
  .header {
    padding: 15px 10px;
  }
  
  .header-top {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
  
  .header h1 {
    font-size: 20px;
    line-height: 1.3;
  }
  
  .sub {
    font-size: 14px;
  }
  
  .card {
    padding: 15px;
    margin-bottom: 15px;
  }
  
  .row {
    flex-direction: column;
    gap: 10px;
  }
  
  .actions {
    flex-direction: column;
    gap: 8px;
  }
  
  button {
    width: 100%;
    padding: 12px;
    font-size: 14px;
  }
  
  .chatgpt-button {
    width: 100% !important;
  }
  
  .chatgpt-container {
    width: 100%;
    flex-direction: column;
    gap: 4px;
  }
  
  #exportAnswersPdf {
    width: 100% !important;
    max-width: 300px;
    margin: 0 auto;
  }
  
  .preview {
    font-size: 12px;
    line-height: 1.5;
    padding: 10px;
  }
  
  .preview-edit {
    font-size: 12px;
    padding: 10px;
  }
  
  .underline-answer {
    width: 100% !important;
    max-width: none !important;
    font-size: 14px;
  }
  
  .question-block {
    padding: 12px;
  }
  
  .question-text {
    font-size: 14px;
    line-height: 1.4;
  }
  
  .answer-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
  }
  
  .comparison-grid {
    flex-direction: column;
  }
  
  .comparison-card {
    margin-bottom: 15px;
  }
  
  .flow-steps {
    flex-wrap: wrap;
    font-size: 12px;
  }
  
  .step {
    min-width: 80px;
    padding: 4px 8px;
  }
  
  .footer {
    font-size: 12px;
    padding: 15px 10px;
  }
  
  /* スマホでのテーマ切り替えボタン */
  .theme-toggle {
    position: relative;
    z-index: 1000;
  }
  
  /* スマホでの共有ボタン */
  .share-buttons {
    right: 10px;
    bottom: 10px;
    gap: 8px;
  }
  
  .share-btn {
    width: 35px;
    height: 35px;
  }
  
  .share-btn svg {
    width: 18px;
    height: 18px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 8px;
  }
  
  .header h1 {
    font-size: 18px;
  }
  
  .sub {
    font-size: 13px;
  }
  
  .card {
    padding: 12px;
  }
  
  .flow-steps {
    flex-direction: column;
    align-items: center;
  }
  
  .arrow {
    transform: rotate(90deg);
    margin: 5px 0;
  }
  
  .footer {
    font-size: 11px;
  }
}
.question-block {
  margin-bottom: 24px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
}
.question-block h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--accent);
}
.question-block h4 {
  margin: 16px 0 4px;
  font-size: 14px;
  color: var(--text);
}
.question-text {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}
.sub-question {
  margin-bottom: 16px;
}
.sub-question:last-child {
  margin-bottom: 0;
}
textarea {
  width: 100%;
  min-height: 120px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-family: 'Courier New', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 14px;
  line-height: 1.4;
  resize: vertical;
  outline: none;
  transition: all 0.3s;
  wrap: hard;
}
textarea:focus {
  border-color: var(--accent);
}
textarea::placeholder {
  color: var(--muted);
}

/* 論述試験用紙スタイルの解答欄 */
.underline-answer {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  margin: 0;
  font-family: 'Courier New', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 14px;
  line-height: 1.8;
  resize: none;
  overflow: hidden;
  background-image: repeating-linear-gradient(
    transparent,
    transparent calc(1.8em - 1px),
    var(--text) calc(1.8em - 1px),
    var(--text) 1.8em
  );
  width: 100%;
}

/* 45文字制限の場合はwidth: 100%をオーバーライド */
.underline-answer.answer-45chars-per-line {
  width: 630px !important; /* 14px × 45文字 = 630px */
  min-width: 630px !important;
  max-width: 630px !important;
  font-size: 14px !important;
  font-family: 'Courier New', monospace !important;
  letter-spacing: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: content-box !important;
  white-space: pre-wrap !important;
  word-wrap: break-word !important;
  overflow-wrap: break-word !important;
}

/* 43文字制限（設問1・2用） */
.underline-answer.answer-43chars-per-line {
  width: 602px !important; /* 14px × 43文字 = 602px */
  min-width: 602px !important;
  max-width: 602px !important;
  font-size: 14px !important;
  font-family: 'Courier New', monospace !important;
  letter-spacing: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: content-box !important;
  white-space: pre-wrap !important;
  word-wrap: break-word !important;
  overflow-wrap: break-word !important;
}

/* 41文字制限（設問3-1用） */
.underline-answer.answer-41chars-per-line {
  width: 574px !important; /* 14px × 41文字 = 574px */
  min-width: 574px !important;
  max-width: 574px !important;
  font-size: 14px !important;
  font-family: 'Courier New', monospace !important;
  letter-spacing: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: content-box !important;
  white-space: pre-wrap !important;
  word-wrap: break-word !important;
  overflow-wrap: break-word !important;
}

/* 42文字制限（設問3-2用） */
.underline-answer.answer-42chars-per-line {
  width: 588px !important; /* 14px × 42文字 = 588px */
  min-width: 588px !important;
  max-width: 588px !important;
  font-size: 14px !important;
  font-family: 'Courier New', monospace !important;
  letter-spacing: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: content-box !important;
  white-space: pre-wrap !important;
  word-wrap: break-word !important;
  overflow-wrap: break-word !important;
}

.underline-answer:focus {
  outline: none;
  background-color: rgba(122, 162, 255, 0.03);
  background-image: repeating-linear-gradient(
    rgba(122, 162, 255, 0.03),
    rgba(122, 162, 255, 0.03) calc(1.8em - 1px),
    var(--accent) calc(1.8em - 1px),
    var(--accent) 1.8em
  );
}

.underline-answer::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

/* 各設問の行数設定 */
.answer-2-lines {
  height: calc(1.8em * 2) !important;
  min-height: calc(1.8em * 2) !important;
  max-height: calc(1.8em * 2) !important;
}

.answer-3-lines {
  height: calc(1.8em * 3) !important;
  min-height: calc(1.8em * 3) !important;
  max-height: calc(1.8em * 3) !important;
}

.answer-6-lines {
  height: calc(1.8em * 6);
}

/* 1行45文字制限（設問1・2用） */
.answer-45chars-per-line {
  width: 45ch !important; /* 45文字分の幅 */
  min-width: 45ch !important;
  max-width: 45ch !important;
  word-wrap: break-word;
  overflow-wrap: break-word;
  box-sizing: content-box;
  font-family: 'Courier New', Consolas, 'Liberation Mono', Menlo, monospace !important;
  font-size: 14px !important;
  letter-spacing: 0 !important;
}
.answer-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}
.char-count {
  font-size: 12px;
  color: var(--muted);
}
.char-count span {
  font-weight: 600;
  color: var(--accent);
}
.clear-btn {
  width: auto;
  padding: 4px 12px;
  font-size: 12px;
  background: var(--muted);
  color: var(--panel);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s;
}
.clear-btn:hover {
  background: var(--accent);
  color: var(--panel);
}

/* 設問3-1専用の特別レイアウト */
.answer-special-layout {
  padding-left: 0 !important;
  margin-left: 0 !important;
  font-family: 'Courier New', Consolas, 'Liberation Mono', Menlo, monospace !important;
  font-size: 14px !important;
  line-height: 1.8 !important;
  width: 602px !important; /* 14px × 43文字 = 602px */
  min-width: 602px !important;
  max-width: 602px !important;
  box-sizing: content-box !important;
}

/* 設問3-1専用: 1行目41文字、2行目45文字制限 */
.problem-input-container .underline-answer.answer-45chars-per-line {
  width: 630px !important; /* 45文字分の幅を維持 */
}
/* PDF印刷用のスタイル */
.pdf-export-content {
  display: none;
}

.pdf-export .pdf-export-content {
  display: block;
  font-family: 'Courier New', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 12px;
  line-height: 1.6;
  color: #000;
  background: #fff;
  padding: 20px;
  max-width: none;
}

.pdf-export .pdf-export-content h1 {
  font-size: 18px;
  margin-bottom: 20px;
  text-align: center;
  border-bottom: 2px solid #000;
  padding-bottom: 10px;
}

.pdf-export .pdf-export-content h2 {
  font-size: 14px;
  margin: 20px 0 10px;
  border-bottom: 1px solid #ccc;
  padding-bottom: 5px;
}

.pdf-export .pdf-export-content .answer-section {
  margin-bottom: 25px;
  page-break-inside: avoid;
}

.pdf-export .pdf-export-content h3 {
  font-size: 14px;
  font-weight: bold;
  margin: 15px 0 5px;
  color: #000;
}

.pdf-export .pdf-export-content .question-text {
  font-size: 12px;
  margin: 5px 0 10px;
  color: #333;
  font-weight: normal;
}

.pdf-export .pdf-export-content .answer-text {
  white-space: pre-wrap;
  border: 1px solid #333;
  padding: 8px;
  margin: 5px 0 15px;
  min-height: 60px;
  background: #fff;
  font-size: 12px;
  line-height: 1.8;
  font-family: 'Courier New', Consolas, 'Liberation Mono', Menlo, monospace;
}

.pdf-export .pdf-export-content .underline-answer-text {
  white-space: pre-wrap;
  border: none;
  padding: 0;
  margin: 10px 0;
  background: transparent;
  font-family: 'Courier New', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 12px;
  line-height: 1.8;
  min-height: calc(1.8em * 2);
  background-image: repeating-linear-gradient(
    transparent,
    transparent calc(1.8em - 1px),
    #333 calc(1.8em - 1px),
    #333 1.8em
  );
}

.pdf-export .pdf-export-content .answer-section.answer-2-lines .underline-answer-text {
  min-height: calc(1.8em * 2);
}

.pdf-export .pdf-export-content .answer-section.answer-3-lines .underline-answer-text {
  min-height: calc(1.8em * 3);
}

.pdf-export .pdf-export-content .answer-section.answer-6-lines .underline-answer-text {
  min-height: calc(1.8em * 6);
}

.pdf-export .pdf-export-content .case-record {
  background: #f0f8ff;
  border: 2px solid #4a90e2;
  padding: 15px;
  margin: 10px 0 20px;
  font-size: 11px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.pdf-export .pdf-export-content .char-count {
  text-align: right;
  font-size: 10px;
  color: #666;
  margin-top: 5px;
}

.pdf-export .container,
.pdf-export .header,
.pdf-export .grid,
.pdf-export .card,
.pdf-export .actions,
.pdf-export .help-card {
  display: none !important;
}

@media print {
  .pdf-export-content {
    display: block !important;
  }
  
  .container,
  .header,
  .grid,
  .card,
  .actions,
  .help-card {
    display: none !important;
  }
  
  body {
    margin: 0;
    padding: 0;
    background: white !important;
    color: black !important;
  }
}

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