/**
 * メインスタイルシート
 * 全ページ共通スタイル定義
 */

/* CSS変数定義 */
:root {
  --primary-color: #3b82f6;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --border-color: #e5e7eb;
  --border-radius: 8px;
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* リセット */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

/* ヘッダー */
header {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem 0;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* メインコンテンツ */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
  min-height: calc(100vh - 150px);
}

/* コンテナ */
.container {
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.container-small {
  max-width: 600px;
  margin: 0 auto;
}

/* ボタン */
button,
.btn {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  text-align: center;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: #2563eb;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
}

.btn-success {
  background-color: var(--success-color);
  color: white;
}

.btn-success:hover {
  background-color: #059669;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
}

.btn-warning {
  background-color: var(--warning-color);
  color: white;
}

.btn-warning:hover {
  background-color: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(245, 158, 11, 0.3);
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
}

.btn-danger:hover {
  background-color: #dc2626;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
}

.btn-secondary {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: #d1d5db;
  transform: translateY(-2px);
}

button:disabled,
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

button:disabled:hover,
.btn:disabled:hover {
  background-color: inherit;
  box-shadow: none;
}

/* プログレスバー */
.progress-bar {
  width: 100%;
  height: 20px;
  background-color: var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  margin: 0.5rem 0;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), #60a5fa);
  width: 0%;
  transition: width 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
}

.progress-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* 問題カード */
.question-card {
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: border-color 0.3s ease;
}

.question-card:hover {
  border-color: var(--primary-color);
}

.question-card h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.question-number {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.option {
  display: flex;
  align-items: center;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s ease;
  background-color: var(--bg-secondary);
}

.option:hover {
  border-color: var(--primary-color);
  background-color: #dbeafe;
}

.option input[type='radio'] {
  margin-right: 0.75rem;
  cursor: pointer;
}

.option label {
  flex: 1;
  cursor: pointer;
  margin: 0;
}

.option.selected {
  border-color: var(--primary-color);
  background-color: #dbeafe;
}

.option.correct {
  border-color: var(--success-color);
  background-color: #d1fae5;
}

.option.incorrect {
  border-color: var(--danger-color);
  background-color: #fee2e2;
}

/* ゲーミフィケーション表示 */
.gamification-display {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.gamification-stat {
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1rem;
  text-align: center;
  transition: transform 0.2s ease;
}

.gamification-stat:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
}

.gamification-stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.gamification-stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.level-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-color), #60a5fa);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-weight: 600;
  margin-top: 0.5rem;
}

/* セクション進捗表示 */
.section-progress {
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin-bottom: 1rem;
  border-left: 4px solid var(--primary-color);
}

.section-progress h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.section-progress-bar {
  background-color: var(--border-color);
  border-radius: 10px;
  height: 12px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.section-progress-fill {
  height: 100%;
  background-color: var(--primary-color);
  width: 0%;
  transition: width 0.3s ease;
}

.section-progress-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* メッセージ表示 */
.message {
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  border-left: 4px solid;
}

.message-success {
  background-color: #d1fae5;
  border-color: var(--success-color);
  color: #065f46;
}

.message-error {
  background-color: #fee2e2;
  border-color: var(--danger-color);
  color: #7f1d1d;
}

.message-info {
  background-color: #dbeafe;
  border-color: var(--primary-color);
  color: #0c2d6b;
}

.message-warning {
  background-color: #fef3c7;
  border-color: var(--warning-color);
  color: #78350f;
}

/* グリッドレイアウト */
.grid {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* テキスト */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #2563eb;
  text-decoration: underline;
}

/* フッター */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 1rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* ユーティリティ */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mt-1 {
  margin-top: 0.25rem;
}

.mt-2 {
  margin-top: 0.5rem;
}

.mt-3 {
  margin-top: 1rem;
}

.mt-4 {
  margin-top: 1.5rem;
}

.mb-1 {
  margin-bottom: 0.25rem;
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-3 {
  margin-bottom: 1rem;
}

.mb-4 {
  margin-bottom: 1.5rem;
}

.p-1 {
  padding: 0.25rem;
}

.p-2 {
  padding: 0.5rem;
}

.p-3 {
  padding: 1rem;
}

.p-4 {
  padding: 1.5rem;
}

.hidden {
  display: none;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}