*,:before,:after{box-sizing:border-box}:root{--color-primary:#f59e0b;--color-primary-dark:#d97706;--color-primary-light:#fef3c7;--color-bg:#fffbeb;--color-surface:#fff;--color-text:#1a1a2e;--color-text-muted:#6b7280;--color-border:#e5d5b0;--color-success:#10b981;--color-success-bg:#d1fae5;--color-error:#ef4444;--color-error-bg:#fee2e2;--radius:12px;--radius-sm:8px;--shadow:0 1px 3px #00000014, 0 1px 2px #0000000f;--shadow-md:0 4px 6px #00000012, 0 2px 4px #0000000f;--shadow-lg:0 10px 15px #0000001a, 0 4px 6px #0000000d;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono:ui-monospace, "SF Mono", "Cascadia Code", "Fira Code", monospace}html{-webkit-text-size-adjust:100%;font-size:16px}body{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100dvh;margin:0}#root{min-height:100dvh}h1,h2,h3{margin:0;font-weight:600;line-height:1.3}p{margin:0;line-height:1.6}button{cursor:pointer;font-family:inherit}input{font-family:inherit}.app{flex-direction:column;min-height:100dvh;display:flex}.app-header{z-index:10;-webkit-backdrop-filter:blur(8px);background:#0f0e0ceb;border-bottom:1px solid #ffffff14;position:sticky;top:0}.app-header .logo{text-transform:uppercase;letter-spacing:.08em;color:#e5e0d5;align-items:center;gap:10px;padding:16px 24px;font-size:13px;font-weight:500;text-decoration:none;transition:color .15s;display:flex}.app-header .logo:hover{color:#fff}.app-header .logo-icon{font-size:1.1rem;line-height:1}.app-main{flex-direction:column;flex:1;display:flex}.screen{flex:1;justify-content:center;align-items:center;padding:24px 16px;display:flex}.screen.setup-screen,.screen.results-screen{align-items:flex-start;padding-top:40px}.setup-card,.quiz-card,.results-card,.error-card{background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow-lg);border:1px solid var(--color-border);width:100%;max-width:640px;padding:32px}.error-card{text-align:center}.error-card h2{margin-bottom:12px}.error-card p{color:var(--color-text-muted);margin-bottom:8px}.error-card .hint{margin-bottom:16px;font-size:14px}.setup-header{text-align:center;margin-bottom:32px}.bee-icon{margin-bottom:8px;font-size:48px;display:block}.setup-header h1{color:var(--color-primary-dark);margin-bottom:4px;font-size:32px}.subtitle{color:var(--color-text-muted);font-size:15px}.setup-section{margin-bottom:24px}.setup-section h2{text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-muted);margin-bottom:12px;font-size:16px}.required{color:var(--color-error);margin-left:2px}.chip-group{flex-wrap:wrap;gap:8px;display:flex}.chip{border-radius:var(--radius-sm);border:2px solid var(--color-border);background:var(--color-surface);color:var(--color-text);cursor:pointer;flex-direction:column;align-items:center;min-width:80px;padding:10px 16px;font-size:14px;font-weight:500;transition:all .15s;display:flex}.chip:hover{border-color:var(--color-primary);background:var(--color-primary-light)}.chip.selected{border-color:var(--color-primary);background:var(--color-primary-light);color:var(--color-primary-dark);font-weight:600;box-shadow:0 0 0 3px #f59e0b26}.chip-label{white-space:nowrap;font-size:14px}.chip-count{color:var(--color-text-muted);margin-top:2px;font-size:11px}.word-count-selector{gap:8px;display:flex}.word-count-selector .chip{min-width:56px}.btn,.chip,.btn-speak,.btn-link{touch-action:manipulation;-webkit-tap-highlight-color:transparent}.btn{border-radius:var(--radius-sm);border:none;justify-content:center;align-items:center;gap:6px;padding:10px 20px;font-size:15px;font-weight:600;transition:all .15s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow)}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background:var(--color-surface);color:var(--color-primary-dark);border:2px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background:var(--color-primary-light);border-color:var(--color-primary)}.btn-danger{background:var(--color-error-bg);color:var(--color-error);border:2px solid var(--color-error)}.btn-danger:hover:not(:disabled){background:#fecaca}.btn-back{color:var(--color-primary-dark);touch-action:manipulation;-webkit-tap-highlight-color:transparent;background:0 0;border:none;align-self:flex-start;padding:4px 0;font-size:16px;font-weight:600}.btn-back:hover{color:var(--color-primary)}.btn-large{border-radius:var(--radius);width:100%;margin-top:8px;padding:14px 24px;font-size:17px}.btn-link{color:var(--color-primary-dark);background:0 0;border:none;padding:4px 8px;font-size:13px;font-weight:500;text-decoration:underline}.btn-link:hover{color:var(--color-primary)}.stepper{background:var(--color-primary-light);border-radius:var(--radius-sm);border:1px solid var(--color-border);justify-content:center;align-items:center;gap:16px;padding:10px 16px;display:flex}.btn-stepper{background:var(--color-surface);border:2px solid var(--color-border);width:44px;height:44px;color:var(--color-text);touch-action:manipulation;-webkit-tap-highlight-color:transparent;border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:18px;display:flex}.btn-stepper:hover:not(:disabled){border-color:var(--color-primary);background:var(--color-primary-light)}.btn-stepper:disabled{opacity:.3}.stepper-label{color:var(--color-primary-dark);text-align:center;min-width:120px;font-size:16px;font-weight:600}.preview-card{background:var(--color-surface);border:2px solid var(--color-primary);border-radius:var(--radius);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:4px;min-height:60px;margin-top:12px;padding:16px 20px;transition:border-color .2s;display:flex}.preview-word{font-size:28px;font-weight:800;font-family:var(--font-mono);color:var(--color-primary-dark);letter-spacing:1.5px}.preview-meta{color:var(--color-text-muted);font-size:12px;font-weight:500}.preview-loading,.preview-empty{color:var(--color-text-muted);font-size:14px;font-style:italic}.btn-speak{border-radius:var(--radius);background:linear-gradient(135deg, var(--color-primary-light), #fde68a);border:2px solid var(--color-primary);width:100%;color:var(--color-primary-dark);box-shadow:var(--shadow);letter-spacing:-.2px;padding:16px;font-size:20px;font-weight:700;transition:all .2s}.btn-speak:hover{box-shadow:var(--shadow-md);transform:scale(1.02)}.btn-speak:active{transform:scale(.98)}.loading-spinner{margin-bottom:12px;font-size:48px;animation:1s infinite bounce}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.spinner{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:16px;height:16px;animation:.6s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.error-banner{background:var(--color-error-bg);color:var(--color-error);border-radius:var(--radius-sm);align-items:center;gap:8px;margin-bottom:16px;padding:10px 16px;font-size:14px;font-weight:500;display:flex}.hint{color:var(--color-text-muted);font-size:13px;font-style:italic}.quiz-card{overscroll-behavior:contain;flex-direction:column;gap:20px;display:flex}.progress-section{align-items:center;gap:12px;display:flex}.progress-bar{background:var(--color-border);border-radius:4px;flex:1;height:8px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));border-radius:4px;height:100%;transition:width .3s}.progress-text{color:var(--color-text-muted);white-space:nowrap;text-align:right;min-width:90px;font-size:13px;font-weight:600}.word-info{background:var(--color-primary-light);border-radius:var(--radius-sm);border:1px solid var(--color-border);padding:20px}.word-meta{align-items:center;gap:12px;margin-bottom:12px;display:flex}.pos-tag{background:var(--color-primary);color:#fff;text-transform:uppercase;letter-spacing:.3px;border-radius:20px;padding:3px 10px;font-size:12px;font-weight:600;display:inline-block}.pronunciation-block{border-radius:var(--radius-sm);border:1px solid var(--color-border);font-size:17px;font-family:var(--font-mono);color:var(--color-text);letter-spacing:.3px;background:#fff;margin-top:8px;padding:10px 14px;font-style:italic}.definition{color:var(--color-text);font-size:16px;line-height:1.6}.example-section{border-top:1px dashed var(--color-border);margin-top:12px;padding-top:12px}.example{border-radius:var(--radius-sm);border:1px solid var(--color-border);color:var(--color-text);background:#fff;margin-top:8px;padding:10px 14px;font-size:15px;line-height:1.6}.answer-section{gap:10px;display:flex}.answer-input{border:2px solid var(--color-border);border-radius:var(--radius-sm);font-size:18px;font-family:var(--font-mono);color:var(--color-text);background:var(--color-surface);letter-spacing:1px;outline:none;flex:1;padding:12px 16px;transition:border-color .15s}.answer-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #f59e0b26}.answer-input::placeholder{color:var(--color-text-muted);font-family:var(--font-sans);letter-spacing:0;font-size:16px}.feedback{border-radius:var(--radius-sm);text-align:center;padding:20px}.feedback.correct{background:var(--color-success-bg);border:1px solid var(--color-success)}.feedback.incorrect{background:var(--color-error-bg);border:1px solid var(--color-error)}.feedback-header{justify-content:center;align-items:center;gap:10px;margin-bottom:8px;display:flex}.feedback-icon{font-size:28px}.feedback-word{font-size:24px;font-weight:700;font-family:var(--font-mono);letter-spacing:1.5px}.feedback.correct .feedback-word{color:var(--color-success)}.feedback.incorrect .feedback-word{color:var(--color-error)}.feedback-answer{color:var(--color-text-muted);margin-bottom:16px;font-size:15px}.feedback .btn{margin-top:8px}.done-card{text-align:center}.done-icon{margin-bottom:16px;font-size:56px;display:block}.done-card h2{margin-bottom:8px;font-size:28px}.done-card p{color:var(--color-text-muted);margin-bottom:20px}.mini-score{text-align:center;color:var(--color-text-muted);background:var(--color-primary-light);border-radius:20px;align-self:center;padding:6px 12px;font-size:13px;font-weight:600}.btn-reveal{border-radius:var(--radius);color:#4338ca;width:100%;box-shadow:var(--shadow);cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;background:linear-gradient(135deg,#e0e7ff,#c7d2fe);border:2px solid #818cf8;padding:18px;font-size:20px;font-weight:700;transition:all .2s}.btn-reveal:hover{box-shadow:var(--shadow-md);transform:scale(1.02)}.btn-reveal:active{transform:scale(.98)}.reveal-section{flex-direction:column;align-items:center;gap:16px;display:flex}.revealed-word{font-size:40px;font-weight:800;font-family:var(--font-mono);color:var(--color-primary-dark);letter-spacing:2px;background:var(--color-primary-light);border-radius:var(--radius);border:2px solid var(--color-primary);text-align:center;word-break:break-word;padding:16px 32px}.self-rate-buttons{gap:12px;width:100%;display:flex}.btn-self-rate{border-radius:var(--radius);cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;border:2px solid #0000;flex:1;padding:18px 12px;font-size:18px;font-weight:700;transition:all .2s}.btn-self-rate.correct{background:var(--color-success-bg);border-color:var(--color-success);color:#065f46}.btn-self-rate.correct:hover{box-shadow:var(--shadow-md);background:#a7f3d0;transform:translateY(-1px)}.btn-self-rate.incorrect{background:var(--color-error-bg);border-color:var(--color-error);color:#991b1b}.btn-self-rate.incorrect:hover{box-shadow:var(--shadow-md);background:#fecaca;transform:translateY(-1px)}.mode-chip{min-width:140px}.score-hero{text-align:center;border-bottom:1px solid var(--color-border);margin-bottom:24px;padding:24px 0}.score-emoji{margin-bottom:12px;font-size:56px;display:block}.score-display{justify-content:center;align-items:baseline;gap:4px;margin-bottom:4px;display:flex}.score-number{color:var(--color-primary-dark);font-size:56px;font-weight:800;line-height:1}.score-divider,.score-total{color:var(--color-text-muted);font-size:36px;font-weight:300}.score-percentage{color:var(--color-text-muted);margin-bottom:12px;font-size:18px;font-weight:600}.score-bar{background:var(--color-border);border-radius:5px;max-width:300px;height:10px;margin:0 auto;overflow:hidden}.score-bar-fill{border-radius:5px;height:100%;transition:width .5s}.score-bar-fill.good{background:linear-gradient(90deg, var(--color-success), #34d399)}.score-bar-fill.needs-work{background:linear-gradient(90deg, var(--color-error), #f87171)}.results-list{margin-bottom:16px}.results-list h2{text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-muted);margin-bottom:12px;font-size:16px}.result-word{border-radius:var(--radius-sm);gap:12px;margin-bottom:6px;padding:12px;transition:background .15s;display:flex}.result-word:hover{background:var(--color-primary-light)}.result-word.correct{border-left:3px solid var(--color-success)}.result-word.incorrect{border-left:3px solid var(--color-error);background:var(--color-error-bg)}.result-icon{flex-shrink:0;margin-top:2px;font-size:20px}.result-word-info{flex-direction:column;gap:2px;display:flex}.result-spelling{font-size:16px;font-weight:700;font-family:var(--font-mono);letter-spacing:.5px}.result-definition{color:var(--color-text-muted);font-size:13px;line-height:1.5}.result-user-answer{color:var(--color-error);margin-top:2px;font-size:13px}.results-actions{border-top:1px solid var(--color-border);gap:10px;padding-top:16px;display:flex}.review-top-meta{text-align:center;color:var(--color-primary-dark);background:var(--color-primary-light);border:1px solid var(--color-primary);border-radius:20px;align-self:center;padding:8px 16px;font-size:14px;font-weight:700}.review-word{font-size:38px;font-weight:800;font-family:var(--font-mono);color:var(--color-primary-dark);letter-spacing:1.5px;text-align:center;word-break:break-word;margin-bottom:12px}.review-nav{gap:12px;display:flex}.review-nav .btn{flex:1;padding:14px 20px;font-size:16px}.screen.missed-screen{align-items:flex-start;padding-top:40px}.missed-card{flex-direction:column;gap:16px;display:flex}.missed-header{flex-direction:column;gap:8px;margin-bottom:8px;display:flex}.missed-title{align-items:baseline;gap:12px;display:flex}.missed-title h2{color:var(--color-primary-dark);margin:0;font-size:22px}.missed-count{color:var(--color-text-muted);background:var(--color-primary-light);border-radius:20px;padding:2px 10px;font-size:14px;font-weight:600}.empty-state{text-align:center;padding:48px 16px}.empty-icon{margin-bottom:12px;font-size:48px;display:block}.empty-state p{color:var(--color-text);margin-bottom:4px;font-size:18px;font-weight:600}.missed-list{flex-direction:column;gap:6px;display:flex}.missed-word-item{border-radius:var(--radius-sm);background:var(--color-error-bg);border-left:3px solid var(--color-error);justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;display:flex}.missed-word-main{flex-direction:column;gap:2px;display:flex}.missed-spelling{font-size:17px;font-weight:700;font-family:var(--font-mono);letter-spacing:.5px}.missed-level-cat{color:var(--color-text-muted);font-size:12px}.missed-word-meta{flex-direction:column;flex-shrink:0;align-items:flex-end;gap:4px;display:flex}.missed-count-badge{color:var(--color-error);white-space:nowrap;font-size:14px;font-weight:700}.missed-date{color:var(--color-text-muted);white-space:nowrap;font-size:12px}@media (width<=600px){.setup-card,.quiz-card,.results-card,.error-card{border-radius:var(--radius-sm);padding:20px 16px}.app-header .logo{padding:12px 16px}.screen{padding:16px 12px}.screen.setup-screen,.screen.results-screen{padding-top:24px}.setup-header h1{font-size:26px}.bee-icon{font-size:40px}.btn-speak{padding:14px;font-size:17px}.feedback-word{font-size:20px}.score-number{font-size:44px}.score-total,.score-divider{font-size:28px}.word-count-selector{flex-wrap:wrap}.answer-section,.results-actions{flex-direction:column}.revealed-word{padding:12px 20px;font-size:28px}.self-rate-buttons{flex-direction:column}.btn-self-rate{padding:16px 12px;font-size:17px}.btn-reveal{padding:16px;font-size:18px}.mode-chip{flex:1;min-width:0}.stepper{gap:12px;padding:8px 12px}.stepper-label{min-width:100px;font-size:15px}.missed-word-item{flex-direction:column;align-items:flex-start}.missed-word-meta{flex-direction:row;align-items:center;gap:12px}.review-word{font-size:28px}.review-nav{flex-direction:column}}.level-category{color:var(--color-primary-dark);font-size:13px;font-weight:600}.stepper-input{border:2px solid var(--color-border);border-radius:var(--radius-sm);width:3.5em;font-size:16px;font-weight:700;font-family:var(--font-mono);color:var(--color-primary-dark);text-align:center;background:var(--color-surface);-moz-appearance:textfield;outline:none;padding:4px 6px}.stepper-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.stepper-input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.stepper-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #f59e0b26}.result-meta-small{color:var(--color-text-muted);margin-top:1px;font-size:11px}.history-list-card h1{color:var(--color-primary-dark);margin:0 0 8px;font-size:24px}.history-list{flex-direction:column;gap:8px;display:flex}.history-entry{border-radius:var(--radius);border:2px solid var(--color-border);background:var(--color-surface);text-align:left;font:inherit;color:inherit;cursor:pointer;flex-direction:column;gap:6px;width:100%;padding:16px;transition:all .15s;display:flex}.history-entry:hover:not(:disabled){border-color:var(--color-primary);background:var(--color-primary-light);box-shadow:var(--shadow);transform:translateY(-1px)}.history-entry:active:not(:disabled){transform:translateY(0)}.history-entry:disabled{opacity:.5;cursor:not-allowed}.history-entry-main{align-items:center;gap:12px;display:flex}.history-entry-emoji{flex-shrink:0;font-size:28px}.history-entry-info{flex-direction:column;flex:1;gap:2px;display:flex}.history-entry-score{color:var(--color-text);font-size:16px;font-weight:700}.history-entry-mode{color:var(--color-text-muted);font-size:13px}.history-entry-date{color:var(--color-text-muted);flex-shrink:0;font-size:13px}.history-entry-filters{color:var(--color-text-muted);border-top:1px dashed var(--color-border);padding-top:4px;font-size:13px}.history-detail-header{text-align:center;border-bottom:1px solid var(--color-border);margin-bottom:16px;padding:16px 0}.history-detail-meta{color:var(--color-text-muted);margin-top:4px;font-size:14px}.history-detail-filters{color:var(--color-text-muted);background:var(--color-primary-light);border-radius:20px;margin-top:8px;padding:8px 16px;font-size:13px;display:inline-block}