@import"https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap";*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #4285f4;--primary-dark: #1967d2;--secondary: #34a853;--accent: #fbbc04;--danger: #ea4335;--text-primary: #202124;--text-secondary: #5f6368;--text-tertiary: #80868b;--background: #ffffff;--background-secondary: #f8f9fa;--border: #dadce0;--border-light: #e8eaed;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 2px 8px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .12);--shadow-xl: 0 8px 32px rgba(0, 0, 0, .15);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px}body{font-family:Noto Sans JP,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--background);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh}button,input,textarea,select{font-family:inherit}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--background-secondary)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.fade-in{animation:fadeIn .3s ease-out}.slide-up{animation:slideUp .4s 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14px;font-size:20px}.icon-button:hover{background:#e8f0fe;border-color:var(--primary);color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.admin-button:hover{background:linear-gradient(135deg,#667eea,#764ba2);border-color:#667eea;color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}.home-button:hover{background:linear-gradient(135deg,#4caf50,#45a049);border-color:#4caf50;color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}.quiz-main{flex:1;display:flex;align-items:center;justify-content:center;padding:24px}.start-screen,.difficulty-screen,.quiz-screen,.result-screen{width:100%;max-width:800px}.welcome-card,.difficulty-card,.quiz-card,.result-card{background:var(--background);border-radius:var(--radius-xl);padding:48px;box-shadow:var(--shadow-lg);text-align:center}.welcome-card h1,.difficulty-card h1,.result-card h1{font-size:32px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.subtitle{color:var(--text-secondary);font-size:16px;margin-bottom:32px}.sand-icon{font-size:80px;margin:32px 0;animation:bounce 2s infinite}.primary-btn{background:var(--primary);color:#fff;border:none;border-radius:var(--radius-xl);padding:16px 48px;font-size:16px;font-weight:500;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow-md)}.primary-btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.primary-btn:active{transform:translateY(0)}.difficulty-options{display:flex;flex-direction:column;gap:16px;margin:32px 0}.difficulty-btn{background:var(--background);border:2px solid var(--border);border-radius:var(--radius-lg);padding:24px;cursor:pointer;transition:all .3s ease;text-align:left}.difficulty-btn:hover{background:linear-gradient(135deg,#e8f0fe,#f5f5f5);border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-md)}.difficulty-title{font-size:24px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.difficulty-description{font-size:14px;color:var(--text-secondary)}.back-btn{background:transparent;color:var(--text-secondary);border:2px solid var(--border);border-radius:var(--radius-lg);padding:12px 32px;font-size:14px;font-weight:500;cursor:pointer;transition:all .3s ease;margin-top:16px}.back-btn:hover{background:var(--background-secondary);border-color:var(--text-secondary);color:var(--text-primary)}.progress-container{margin-bottom:32px}.progress-bar{width:100%;height:8px;background:var(--background-secondary);border-radius:4px;overflow:hidden;margin-bottom:12px}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:4px;transition:width .4s 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h4{font-size:16px;font-weight:600;color:var(--secondary);margin-bottom:12px;display:flex;align-items:center;gap:8px}.explanation-box-inline p{font-size:15px;line-height:1.7;color:var(--text-primary);margin:0}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes feedbackBounce{0%{transform:scale(.3);opacity:0}50%{transform:scale(1.05)}to{transform:scale(1);opacity:1}}@keyframes iconPop{0%,to{transform:scale(1)}25%{transform:scale(1.2) rotate(-5deg)}75%{transform:scale(1.2) rotate(5deg)}}.trophy{font-size:80px;margin-bottom:24px;animation:bounce 2s infinite}.score-container{margin:32px 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var(--border-light)}.welcome-message h2{font-size:24px;font-weight:600;margin-bottom:12px;color:var(--text-primary)}.welcome-message p{color:var(--text-secondary);font-size:16px}@media (max-width: 768px){.stats-grid{grid-template-columns:1fr}.chart-bar-item{grid-template-columns:1fr;gap:8px}.chart-question-info{flex-direction:column;align-items:flex-start}.chart-answer-count{text-align:left}}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}.modal-content{background:var(--background);border-radius:var(--radius-lg);max-width:700px;width:90%;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-xl);animation:slideUp .3s ease}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:24px;border-bottom:1px solid var(--border-light)}.modal-header h2{font-size:20px;font-weight:600;color:var(--text-primary)}.close-btn{background:none;border:none;font-size:32px;color:var(--text-secondary);cursor:pointer;line-height:1;padding:0;width:32px;height:32px;transition:color .2s}.close-btn:hover{color:var(--text-primary)}.modal-content form{padding:24px}.form-group label{display:block;font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.form-group input[type=text],.form-group input[type=url],.form-group textarea,.form-group select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;background:var(--background);color:var(--text-primary);transition:all .2s;box-sizing:border-box}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px 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.2s}.image-upload-box:hover{border-color:var(--primary);background:#e8f0fe}.upload-label{display:inline-block;background:var(--primary);color:#fff;border-radius:var(--radius-sm);padding:12px 24px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.upload-label:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-md)}.upload-hint{margin-top:12px;font-size:13px;color:var(--text-secondary);padding:12px;background:var(--background-secondary);border-radius:var(--radius-sm);text-align:center}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.question-manager h1{font-size:28px;font-weight:600;color:var(--text-primary)}.add-btn{background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);padding:12px 24px;font-size:14px;font-weight:500;cursor:pointer;transition:all 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768px){.section-header{flex-direction:column;align-items:stretch;gap:16px}.export-btn{width:100%}.stat-item-info{flex-direction:column;gap:8px}.chart-label{min-width:80px;font-size:13px}}.settings h1{font-size:28px;font-weight:600;margin-bottom:24px;color:var(--text-primary)}.settings-card{background:var(--background);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-sm);max-width:600px;border:1px solid var(--border-light);margin-bottom:24px}.description{color:var(--text-secondary);font-size:14px;margin-bottom:20px;line-height:1.5}.settings-card h2{font-size:20px;font-weight:600;margin-bottom:24px;color:var(--text-primary)}.message{padding:12px 16px;border-radius:var(--radius-sm);margin-bottom:16px;font-size:14px}.message.success{background:#e6f4ea;color:var(--secondary);border:1px solid var(--secondary)}.message.error{background:#fce8e6;color:var(--danger);border:1px solid var(--danger)}.settings-card .primary-btn{width:auto;padding:12px 32px}.migration-actions{display:flex;gap:12px;margin-bottom:20px}.secondary-btn{background:var(--background-secondary);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 24px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.secondary-btn:hover:not(:disabled){background:var(--border);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.secondary-btn:disabled,.primary-btn:disabled{opacity:.5;cursor:not-allowed}.migration-status{background:var(--background-secondary);border-radius:var(--radius-sm);padding:16px;margin-top:20px}.status-item{padding:8px 0;font-size:14px;color:var(--text-primary)}.status-item strong{color:var(--text-secondary);margin-right:8px}.status-ok{color:var(--secondary);font-weight:600}.status-warn{color:#f57c00;font-weight:600}.status-error{color:var(--danger);font-weight:600;padding:12px;background:#fce8e6;border-radius:var(--radius-sm)}.migration-details{margin-top:12px;padding-top:12px;border-top:1px solid var(--border-light)}.migration-details summary{cursor:pointer;font-size:13px;color:var(--primary);font-weight:500;padding:4px 0;-webkit-user-select:none;user-select:none}.migration-details summary:hover{text-decoration:underline}.migration-details ul{margin-top:8px;padding-left:20px;font-size:13px;color:var(--text-secondary)}.migration-details li{padding:4px 0}@media (max-width: 768px){.migration-actions{flex-direction:column}.secondary-btn,.primary-btn{width:100%}}.import-export{padding:24px}.import-export h1{font-size:28px;font-weight:600;color:var(--text-primary);margin-bottom:24px}.import-export-container{display:grid;gap:24px}.section-card{background:var(--background);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-md);border:1px solid var(--border-light)}.section-card h2{font-size:22px;font-weight:600;color:var(--text-primary);margin-bottom:16px}.section-description{color:var(--text-secondary);line-height:1.6;margin-bottom:24px}.import-options{margin-bottom:20px;padding:16px;background:var(--background-secondary);border-radius:var(--radius-sm)}.checkbox-label{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:15px}.checkbox-label input[type=checkbox]{width:18px;height:18px;cursor:pointer}.file-input{display:none}.file-input-wrapper{margin-bottom:16px}.file-input-label{display:inline-block;padding:12px 32px;background:var(--primary);color:#fff;border-radius:var(--radius-sm);cursor:pointer;font-weight:500;transition:all .2s;box-shadow:var(--shadow-sm)}.file-input-label:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-md)}.file-input:disabled+.file-input-label{background:var(--text-secondary);cursor:not-allowed;transform:none}.warning-box{padding:12px 16px;background:#fff3cd;border:1px solid #ffc107;border-radius:var(--radius-sm);color:#856404;font-size:14px;font-weight:500}.code-block{background:#f8f9fa;border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;overflow-x:auto;font-family:Monaco,Courier New,monospace;font-size:13px;line-height:1.5;color:#333;margin-bottom:16px}.note{font-size:14px;color:var(--text-secondary);line-height:1.6}@media (min-width: 768px){.import-export-container{grid-template-columns:repeat(2,1fr)}.format-info{grid-column:1 / -1}}.admin-container{min-height:100vh;display:flex;background:var(--background-secondary)}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e8eaf6,#f5f5f5);padding:20px}.login-card{background:var(--background);border-radius:var(--radius-xl);padding:48px;box-shadow:var(--shadow-xl);max-width:400px;width:100%}.logo{text-align:center;margin-bottom:32px}.logo-text{font-size:36px;font-weight:700;letter-spacing:-1px}.logo h2{margin-top:12px;font-size:20px;font-weight:500;color:var(--text-secondary)}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-primary);font-size:14px}.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:14px;transition:border-color .2s;background:var(--background);color:var(--text-primary)}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary)}.form-group textarea{resize:vertical;min-height:80px}.error-message{color:var(--danger);font-size:14px;margin-bottom:16px;padding:12px;background:#fce8e6;border-radius:var(--radius-sm)}.primary-btn{width:100%;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);padding:14px;font-size:16px;font-weight:500;cursor:pointer;transition:all .3s ease}.primary-btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-md)}.sidebar{width:260px;background:var(--background);border-right:1px solid var(--border-light);display:flex;flex-direction:column;position:fixed;height:100vh;overflow-y:auto}.sidebar-header{padding:24px;border-bottom:1px solid var(--border-light)}.logo-small .logo-text{font-size:24px}.admin-name{margin-top:12px;font-size:14px;color:var(--text-secondary)}.admin-name span{color:var(--text-primary);font-weight:500}.nav-menu{flex:1;list-style:none;padding:16px 0}.nav-link{display:block;width:100%;padding:12px 24px;color:var(--text-secondary);text-decoration:none;transition:all .2s;font-weight:500;background:none;border:none;text-align:left;cursor:pointer;font-size:15px;border-left:3px solid transparent}.nav-link:hover{background:var(--background-secondary);color:var(--text-primary)}.nav-link.active{background:#e8f0fe;color:var(--primary);border-left-color:var(--primary)}.logout-btn{margin:16px;padding:12px;background:var(--background-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;font-weight:500;color:var(--text-secondary);transition:all .2s}.logout-btn:hover{background:#fce8e6;color:var(--danger);border-color:var(--danger)}.main-content{margin-left:260px;flex:1;padding:32px;max-width:1400px}.loading{text-align:center;padding:48px;color:var(--text-secondary);font-size:18px}@media (max-width: 768px){.admin-container{flex-direction:column}.sidebar{position:relative;width:100%;height:auto}.main-content{margin-left:0}.login-card{padding:32px 24px}}