*{box-sizing:border-box;margin:0;padding:0}body{color:#1f2937;background:#f3f4f6;min-height:100vh;padding:16px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.quiz-page,.summary,.loading,.error{max-width:480px;margin:0 auto}.progress{margin-bottom:24px}.progress span{color:#6b7280;font-size:14px}.progress-bar{background:#e5e7eb;border-radius:2px;height:4px;margin-top:8px}.progress-fill{background:#4f46e5;border-radius:2px;height:100%;transition:width .3s}.quiz-card{background:#fff;border-radius:16px;padding:32px 24px;box-shadow:0 1px 3px #0000001a}.word-display{text-align:center;margin-bottom:32px}.word-display h2{margin-bottom:4px;font-size:32px}.pronunciation{color:#9ca3af;font-size:14px}.options{flex-direction:column;gap:12px;display:flex}.option{text-align:left;cursor:pointer;background:#fff;border:2px solid #e5e7eb;border-radius:12px;padding:16px;font-size:15px;transition:all .2s}.option:hover:not(:disabled){background:#eef2ff;border-color:#a5b4fc}.option.selected{background:#eef2ff;border-color:#4f46e5}.option.correct{background:#ecfdf5;border-color:#10b981}.option.wrong{background:#fef2f2;border-color:#ef4444}.option.dimmed{opacity:.5}.feedback{text-align:center;margin-top:24px}.correct-text{color:#10b981;font-size:18px;font-weight:600}.wrong-text{color:#ef4444;font-size:18px;font-weight:600}.example{color:#6b7280;margin:12px 0;font-style:italic}.next-btn{color:#fff;cursor:pointer;background:#4f46e5;border:none;border-radius:8px;margin-top:16px;padding:12px 32px;font-size:16px;font-weight:600}.next-btn:hover{background:#4338ca}.summary{text-align:center;background:#fff;border-radius:16px;padding:32px 24px;box-shadow:0 1px 3px #0000001a}.summary h2,.score{margin-bottom:16px}.score-number{color:#4f46e5;font-size:48px;font-weight:700}.score-percent{color:#6b7280;font-size:14px;display:block}.streak{margin-bottom:24px;font-size:20px}.missed-words{text-align:left;margin-top:24px}.missed-words h3{color:#374151;margin-bottom:12px}.missed-word{border-bottom:1px solid #f3f4f6;padding:12px 0}.missed-word p{color:#6b7280;margin-top:4px;font-size:14px}.loading{text-align:center;color:#6b7280;padding:64px 0}.error{text-align:center;padding:64px 0}.error h2{color:#ef4444;margin-bottom:8px}.error p{color:#6b7280}.notice{color:#92400e;text-align:center;background:#fffbeb;border:1px solid #fcd34d;border-radius:8px;margin-bottom:16px;padding:10px 14px;font-size:14px}.history-page{max-width:480px;margin:0 auto}.history-page h1{margin-bottom:24px;font-size:24px}.stats-grid{grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:32px;display:grid}.stat-card{text-align:center;background:#fff;border-radius:12px;padding:16px;box-shadow:0 1px 3px #0000001a}.stat-value{color:#4f46e5;font-size:24px;font-weight:700;display:block}.stat-label{color:#6b7280;font-size:12px}.hardest-section{margin-bottom:32px}.hardest-section h2{margin-bottom:12px;font-size:18px}.hardest-word{background:#fff;border-radius:8px;margin-bottom:8px;padding:12px 16px}.hardest-word p{color:#6b7280;margin-top:4px;font-size:14px}.sessions-section h2{font-size:18px}.filter-bar{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.filters button{cursor:pointer;background:#fff;border:1px solid #e5e7eb;border-radius:6px;margin-left:4px;padding:6px 12px;font-size:13px}.filters button.active{color:#fff;background:#4f46e5;border-color:#4f46e5}.session-row{background:#fff;border-radius:8px;justify-content:space-between;margin-bottom:6px;padding:12px 16px;font-size:14px;display:flex}.session-date{color:#374151}.session-type{color:#6b7280;text-transform:capitalize}.session-score{color:#4f46e5;font-weight:600}.admin-page{max-width:480px;margin:0 auto}.admin-page h1{margin-bottom:24px;font-size:24px}.admin-card{background:#fff;border-radius:16px;margin-bottom:16px;padding:24px;box-shadow:0 1px 3px #0000001a}.field{margin-bottom:18px;display:block}.field-label{color:#374151;margin-bottom:6px;font-size:13px;font-weight:600;display:block}.field input,.field select{color:#1f2937;background:#fff;border:2px solid #e5e7eb;border-radius:10px;width:100%;padding:12px 14px;font-size:15px}.field input:focus,.field select:focus{border-color:#a5b4fc;outline:none}.field-hint{color:#9ca3af;margin-top:6px;font-size:12px;display:block}.checkbox-row{color:#4b5563;align-items:center;gap:8px;margin-bottom:18px;font-size:14px;display:flex}.checkbox-row input{width:auto}.primary-btn{color:#fff;cursor:pointer;background:#4f46e5;border:none;border-radius:8px;width:100%;padding:12px 32px;font-size:16px;font-weight:600}.primary-btn:hover:not(:disabled){background:#4338ca}.primary-btn:disabled{opacity:.5;cursor:not-allowed}.admin-status{text-align:center;border-radius:8px;margin-bottom:16px;padding:10px 14px;font-size:14px}.admin-status.ok{color:#065f46;background:#ecfdf5;border:1px solid #6ee7b7}.admin-status.error{color:#991b1b;background:#fef2f2;border:1px solid #fca5a5}.other-keys{border-top:1px solid #f3f4f6;margin:4px 0 18px;padding-top:14px}.other-key-row{color:#6b7280;justify-content:space-between;gap:12px;padding:4px 0;font-size:13px;display:flex}.other-key-row code{color:#374151;background:#f3f4f6;border-radius:4px;padding:1px 6px}.page-links{justify-content:center;gap:20px;margin-top:24px;display:flex}.page-links a{color:#6366f1;font-size:14px;font-weight:500;text-decoration:none}.page-links a:hover{text-decoration:underline}.summary-actions{gap:12px;margin-top:28px;display:flex}.summary-actions button{flex:1}.secondary-btn{color:#4f46e5;cursor:pointer;background:#fff;border:2px solid #c7d2fe;border-radius:8px;padding:12px 20px;font-size:15px;font-weight:600}.secondary-btn:hover:not(:disabled){background:#eef2ff;border-color:#a5b4fc}.secondary-btn:disabled{opacity:.5;cursor:not-allowed}