:root{--color-bg-primary: #1a1a2e;--color-bg-secondary: #16213e;--color-bg-tertiary: #0f3460;--color-bg-hover: #1e2d4a;--color-text-primary: #eee;--color-text-secondary: #b8c5d6;--color-text-muted: #8892a0;--color-accent: #64ffda;--color-accent-hover: #64ffda;--color-error: #ff6b6b;--color-warning: #ffa500;--color-success: #64ffda;--color-result-first-try-bg: #1a4d3a;--color-result-first-try-text: #64ffda;--color-result-retry1-bg: #4d2a2a;--color-result-retry1-text: #ff9999;--color-result-retry2-bg: #5d2020;--color-result-retry2-text: #ff7777;--color-result-retry3-bg: #6d1515;--color-result-retry3-text: #ff5555;--color-result-retry4-bg: #7d0a0a;--color-result-retry4-text: #ff3333;--color-neutral: #4a5568;--color-border: #2a3a5e;--font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-family-mono: "Courier New", monospace;--spacing-xs: 5px;--spacing-sm: 10px;--spacing-md: 15px;--spacing-lg: 20px;--spacing-xl: 30px;--spacing-2xl: 40px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--shadow-card: 0 10px 40px rgba(0, 0, 0, .3)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family-base);background:var(--color-bg-primary);color:var(--color-text-primary);min-height:100vh}#root{min-height:100vh}.word-display{font-family:var(--font-family-mono);font-size:72px;font-weight:700;letter-spacing:4px}.word-display .tricky{color:var(--color-error);text-decoration:underline;text-decoration-color:var(--color-error);text-underline-offset:8px}.fill-in-blank{font-family:var(--font-family-mono);font-size:48px;display:flex;justify-content:center;gap:8px}.fill-blank-char{display:flex;flex-direction:column;align-items:center}.fill-blank-char .typed-char,.fill-blank-char .blank-char{display:block;line-height:1}.fill-blank-char .typed-char{color:var(--color-accent)}.fill-blank-char .blank-char{color:var(--color-neutral);transform:translateY(-.8em)}.fill-blank-char .blank-char.tricky{color:var(--color-error)}.diff-display{font-family:var(--font-family-mono);font-size:48px;letter-spacing:8px;text-align:center}.diff-correct{color:var(--color-accent)}.diff-correct.tricky{color:var(--color-accent);text-decoration:underline;text-decoration-color:var(--color-error);text-underline-offset:8px}.diff-substitute{position:relative;display:inline}.diff-wrong{color:var(--color-error);text-decoration:line-through;text-decoration-thickness:2px}.diff-correction{color:var(--color-accent);font-size:.7em;vertical-align:super;margin-left:-.3em}.diff-correction.tricky{color:var(--color-accent);text-decoration:underline;text-decoration-color:var(--color-error);text-underline-offset:4px}.diff-missing{color:var(--color-error);position:relative}.diff-missing:before{content:"";position:absolute;top:-8px;left:calc(50% - 4px);transform:translate(-50%);width:0;height:0;border-left:8px solid transparent;border-right:8px solid transparent;border-top:10px solid var(--color-error)}.diff-missing.tricky{text-decoration:underline;text-decoration-color:var(--color-error);text-underline-offset:8px}.diff-extra{color:var(--color-warning);text-decoration:line-through;text-decoration-thickness:2px}.deck-selector{position:relative}.deck-selector-btn{display:flex;align-items:center;gap:8px;padding:8px 12px;font-size:14px;background:transparent;border:1px solid var(--color-accent);color:var(--color-accent);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s}.deck-selector-btn:hover{background:#64ffda1a}.deck-selector-name{max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.deck-selector-arrow{font-size:10px}.deck-selector-dropdown{position:absolute;top:100%;right:0;margin-top:8px;min-width:280px;background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:0 4px 16px #0006;z-index:100;overflow:hidden}.deck-selector-section{padding:8px 0}.deck-selector-section-label{padding:8px 16px;font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--color-text-secondary)}.deck-selector-item{display:flex;align-items:center;gap:8px;padding:10px 16px;cursor:pointer;transition:background .15s}.deck-selector-item:hover{background:var(--color-bg-hover)}.deck-selector-item.active{background:#64ffda1a}.deck-selector-item-name{flex:1;font-size:14px;color:var(--color-text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.deck-selector-item-count{font-size:12px;color:var(--color-text-secondary);padding:2px 6px;background:var(--color-bg-primary);border-radius:var(--radius-sm)}.deck-selector-item-delete{font-size:16px;color:var(--color-error);padding:0 4px;opacity:.5;transition:opacity .15s}.deck-selector-item-delete:hover{opacity:1}.deck-selector-upload{display:flex;align-items:center;gap:8px;padding:12px 16px;font-size:14px;color:var(--color-accent);cursor:pointer;border-top:1px solid var(--color-border);transition:background .15s}.deck-selector-upload:hover{background:var(--color-bg-hover)}.deck-selector-upload-icon{font-size:18px;font-weight:700}.app-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:var(--color-bg-secondary)}.app-header-modes{display:flex;gap:16px}.app-header .mode-btn{padding:10px 24px;font-size:14px;border:2px solid var(--color-accent);background:transparent;color:var(--color-accent);border-radius:var(--radius-md);cursor:pointer;transition:all .2s}.app-header .mode-btn:hover,.app-header .mode-btn.active{background:var(--color-accent);color:var(--color-bg-primary)}.app-header-right{display:flex;align-items:center;gap:12px}.settings-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:2px solid var(--color-accent);background:transparent;color:var(--color-accent);border-radius:var(--radius-md);cursor:pointer;transition:all .2s}.settings-btn:hover{background:var(--color-accent);color:var(--color-bg-primary)}.file-picker{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:20px}.file-picker h1{color:var(--color-accent)}.file-picker input[type=file]{padding:15px 30px;font-size:18px;cursor:pointer}.recent-files{margin-top:30px;width:100%;max-width:400px}.recent-files-label{color:var(--color-accent);font-size:14px;text-transform:uppercase;letter-spacing:1px;margin-bottom:15px;text-align:center}.recent-files-list{display:flex;flex-direction:column;gap:10px}.recent-file-item{display:flex;justify-content:space-between;align-items:center;background:var(--color-bg-secondary);padding:12px 20px;border-radius:var(--radius-md);cursor:pointer;transition:all .2s}.recent-file-item:hover{background:var(--color-bg-hover);transform:translate(5px)}.recent-file-name{color:var(--color-text-primary);font-size:16px}.recent-file-count{color:var(--color-accent);font-size:14px}.recent-file-delete{color:var(--color-error);font-size:18px;padding:0 8px;cursor:pointer;opacity:.6}.recent-file-delete:hover{opacity:1}.mode-bar{display:flex;justify-content:center;gap:20px;padding:20px;background:var(--color-bg-secondary)}.mode-btn{padding:12px 30px;font-size:16px;border:2px solid var(--color-accent);background:transparent;color:var(--color-accent);border-radius:var(--radius-md);cursor:pointer;transition:all .2s}.mode-btn:hover,.mode-btn.active{background:var(--color-accent);color:var(--color-bg-primary)}.tag-filter{display:flex;align-items:center;gap:15px;margin-bottom:20px;padding:15px 20px;background:var(--color-bg-secondary);border-radius:var(--radius-md);flex-wrap:wrap}.tag-filter-label{color:var(--color-accent);font-size:14px;text-transform:uppercase;letter-spacing:1px}.tag-checkbox{display:flex;align-items:center;gap:8px;cursor:pointer}.tag-checkbox input{width:18px;height:18px;cursor:pointer;accent-color:var(--color-accent)}.tag-checkbox label{color:var(--color-text-secondary);font-size:14px;cursor:pointer}.tag-checkbox input:checked+label{color:var(--color-accent)}.unfamiliar-filter{display:flex;align-items:center;gap:15px;padding:10px 20px;background:var(--color-bg-tertiary)}.unfamiliar-checkbox{display:flex;align-items:center;gap:8px;cursor:pointer}.unfamiliar-checkbox input{width:18px;height:18px;cursor:pointer;accent-color:var(--color-accent)}.unfamiliar-checkbox label{color:var(--color-text-secondary);font-size:14px;cursor:pointer}.unfamiliar-options{display:none;align-items:center;gap:8px}.unfamiliar-options.show{display:flex}.unfamiliar-options label{color:var(--color-text-muted);font-size:13px}.unfamiliar-options select{padding:4px 8px;font-size:13px;background:var(--color-bg-secondary);color:var(--color-text-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);cursor:pointer}.summary-container{padding:40px 20px;max-width:1100px;margin:0 auto}.summary-table{width:100%;border-collapse:collapse;background:var(--color-bg-secondary);border-radius:var(--radius-lg);overflow:hidden}.summary-table th,.summary-table td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--color-border)}.summary-table th{background:var(--color-bg-tertiary);color:var(--color-accent);font-size:14px;text-transform:uppercase;letter-spacing:1px}.summary-table td:first-child,.summary-table th:first-child{width:50px;text-align:center}.summary-table td:nth-child(2){white-space:nowrap}.summary-table .summary-word{font-size:18px;letter-spacing:1px}.summary-table td:nth-child(3){color:var(--color-text-secondary)}.summary-table td:nth-child(4){color:var(--color-text-muted);font-size:14px}.summary-table tbody tr:hover{background:var(--color-bg-hover)}.summary-table tbody tr.clickable{cursor:pointer}.summary-table tbody tr.clickable:active{background:var(--color-bg-tertiary)}.summary-table tbody tr:last-child td{border-bottom:none}.phase-indicator{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md)}.phase-indicator-phases,.phase-indicator-item{display:flex;align-items:center;gap:var(--spacing-xs)}.phase-divider{width:8px;height:2px;background:var(--color-border)}.phase-dot{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:600;transition:all .2s ease}.phase-dot.completed{background:var(--color-success);color:var(--color-bg-primary)}.phase-dot.current{background:var(--color-accent);color:var(--color-bg-primary);box-shadow:0 0 0 3px #64ffda4d}.phase-dot.upcoming{background:var(--color-bg-tertiary);color:var(--color-text-muted)}.phase-indicator-label{color:var(--color-text-secondary);font-size:14px;font-weight:500}.learn-container{display:flex;flex-direction:column;align-items:center;padding:20px;min-height:calc(100vh - 80px)}.learn-header{display:flex;justify-content:space-between;align-items:center;width:100%;max-width:700px;margin-bottom:var(--spacing-md)}.learn-exit-btn{background:var(--color-neutral);color:#fff;border:none;padding:8px 16px;border-radius:var(--radius-md);cursor:pointer;font-size:14px;transition:opacity .2s}.learn-exit-btn:hover{opacity:.8}.learn-word-progress{color:var(--color-text-muted);font-size:14px}.learn-card{background:var(--color-bg-secondary);border-radius:var(--radius-xl);padding:40px;max-width:700px;width:100%;box-shadow:var(--shadow-card)}.phase-content{display:flex;flex-direction:column;gap:var(--spacing-lg)}.phase-title{color:var(--color-accent);font-size:14px;text-transform:uppercase;letter-spacing:1px;margin-bottom:var(--spacing-sm)}.phase-main-word{text-align:center;font-size:48px;font-weight:600;color:var(--color-text-primary);margin:var(--spacing-lg) 0}.phase-syllables{text-align:center;font-size:32px;color:var(--color-text-primary);letter-spacing:2px}.phase-syllables .syllable-dot{color:var(--color-accent);margin:0 4px}.phase-definition{font-size:20px;color:var(--color-text-secondary);line-height:1.5}.phase-example{font-style:italic;color:var(--color-text-muted);font-size:18px}.phase-memory-tip{background:var(--color-bg-tertiary);padding:15px 20px;border-radius:var(--radius-md);border-left:4px solid var(--color-accent)}.phase-memory-tip-label{color:var(--color-accent);font-size:12px;text-transform:uppercase;letter-spacing:1px;margin-bottom:5px}.phase-image{max-width:300px;max-height:200px;border-radius:var(--radius-md);margin:0 auto;display:block}.audio-btn{background:var(--color-bg-tertiary);border:2px solid var(--color-accent);color:var(--color-accent);padding:12px 24px;border-radius:var(--radius-md);cursor:pointer;font-size:16px;display:flex;align-items:center;gap:8px;margin:0 auto;transition:all .2s}.audio-btn:hover{background:var(--color-accent);color:var(--color-bg-primary)}.audio-btn:disabled{opacity:.5;cursor:not-allowed}.continue-btn{background:var(--color-accent);color:var(--color-bg-primary);border:none;padding:15px 40px;border-radius:var(--radius-md);cursor:pointer;font-size:18px;font-weight:500;margin-top:var(--spacing-lg);transition:transform .1s}.continue-btn:hover{transform:scale(1.02)}.continue-btn:active{transform:scale(.98)}.continue-btn:disabled{opacity:.5;cursor:not-allowed}.word-family-container{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-lg)}.word-family-arrow{color:var(--color-accent);font-size:24px}.base-word{font-size:28px;color:var(--color-text-secondary)}.target-word{font-size:36px;font-weight:600;color:var(--color-text-primary)}.tricky-parts-container{display:flex;flex-wrap:wrap;justify-content:center;gap:4px;margin:var(--spacing-lg) 0}.tricky-char{width:40px;height:50px;display:flex;align-items:center;justify-content:center;font-size:28px;border-radius:var(--radius-sm);cursor:pointer;transition:all .2s;background:var(--color-bg-tertiary);color:var(--color-text-primary);border:2px solid transparent}.tricky-char:hover{background:var(--color-bg-hover)}.tricky-char.selected{background:var(--color-error);color:#fff;border-color:var(--color-error)}.tricky-char.confirmed{background:#64ffda33;border-color:var(--color-accent)}.cover-build-word{display:flex;flex-wrap:wrap;justify-content:center;gap:4px;margin:var(--spacing-lg) 0}.cover-build-char{width:40px;height:50px;display:flex;align-items:center;justify-content:center;font-size:28px;background:var(--color-bg-tertiary);border-radius:var(--radius-sm);color:var(--color-text-primary)}.cover-build-char.blank{background:var(--color-bg-primary);border:2px dashed var(--color-border)}.cover-build-char.tricky{color:var(--color-error);text-decoration:underline}.cover-build-char.blank.current{border-color:var(--color-accent);border-style:solid;animation:pulse-border 1s infinite}@keyframes pulse-border{0%,to{border-color:var(--color-accent)}50%{border-color:var(--color-border)}}.cover-build-char.revealed.correct{background:var(--color-success);color:#fff;border:none}.cover-build-char.revealed.wrong{background:var(--color-error);color:#fff;border:none;animation:shake .3s}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-5px)}40%,80%{transform:translate(5px)}}.phase-content.flash-wrong{animation:flash-red .3s}@keyframes flash-red{0%,to{background:transparent}50%{background:#ff6b6b4d}}.cover-build-input{position:absolute;opacity:0;pointer-events:none}.learn-input{width:100%;padding:15px;font-size:24px;text-align:center;background:var(--color-bg-tertiary);border:2px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text-primary);outline:none;transition:border-color .2s}.learn-input:focus{border-color:var(--color-accent)}.accuracy-display{text-align:center;color:var(--color-text-muted);font-size:14px;margin-top:var(--spacing-sm)}.accuracy-display .accuracy-value{color:var(--color-accent);font-weight:600}.confidence-checklist{display:flex;flex-direction:column;gap:var(--spacing-md);margin:var(--spacing-lg) 0}.confidence-item{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);background:var(--color-bg-tertiary);border-radius:var(--radius-md);cursor:pointer;transition:background .2s}.confidence-item:hover{background:var(--color-bg-hover)}.confidence-item input[type=checkbox]{width:24px;height:24px;accent-color:var(--color-accent)}.confidence-item label{font-size:18px;color:var(--color-text-primary);cursor:pointer}.complete-content{text-align:center}.complete-icon{font-size:64px;margin-bottom:var(--spacing-lg)}.complete-message{font-size:24px;color:var(--color-text-primary);margin-bottom:var(--spacing-sm)}.complete-word{font-size:32px;font-weight:600;color:var(--color-accent);margin-bottom:var(--spacing-xl)}.complete-actions{display:flex;gap:var(--spacing-md);justify-content:center}.complete-actions .secondary-btn{background:var(--color-neutral);color:#fff;border:none;padding:15px 30px;border-radius:var(--radius-md);cursor:pointer;font-size:16px;transition:opacity .2s}.complete-actions .secondary-btn:hover{opacity:.8}.feedback-correct{color:var(--color-success);text-align:center;font-size:18px;margin-top:var(--spacing-md)}.feedback-incorrect{color:var(--color-error);text-align:center;font-size:18px;margin-top:var(--spacing-md)}.sentence-with-blank{font-size:20px;line-height:1.6;color:var(--color-text-secondary);text-align:center;margin:var(--spacing-lg) 0}.sentence-blank{display:inline-block;min-width:120px;border-bottom:2px solid var(--color-accent);margin:0 4px;text-align:center;color:var(--color-text-primary)}.empty-state{text-align:center;padding:var(--spacing-xl)}.empty-state-message{font-size:20px;color:var(--color-text-primary);margin-bottom:var(--spacing-sm)}.empty-state-hint{color:var(--color-text-muted);font-size:16px}.practice-complete{text-align:center}.practice-complete h2{color:var(--color-accent);margin-bottom:20px}.practice-final-time{font-size:24px;color:var(--color-text-muted);margin-bottom:30px}.practice-results{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:15px;margin-bottom:20px}.result-item{padding:15px 20px;border-radius:var(--radius-md);font-family:var(--font-family-mono);font-size:18px;letter-spacing:1px}.result-item .result-word{font-size:18px;letter-spacing:1px}.result-item.first-try{background:var(--color-result-first-try-bg);color:var(--color-result-first-try-text)}.result-item.retry-1{background:var(--color-result-retry1-bg);color:var(--color-result-retry1-text)}.result-item.retry-2{background:var(--color-result-retry2-bg);color:var(--color-result-retry2-text)}.result-item.retry-3{background:var(--color-result-retry3-bg);color:var(--color-result-retry3-text)}.result-item.retry-4plus{background:var(--color-result-retry4-bg);color:var(--color-result-retry4-text)}.results-actions{display:flex;justify-content:center;gap:15px;margin-top:30px}.practice-btn.restart{background:var(--color-accent);color:var(--color-bg-primary)}.practice-container{padding:40px 20px;max-width:900px;margin:0 auto}.practice-header{text-align:center;margin-bottom:30px}.practice-header h2{color:var(--color-accent);margin-bottom:10px}.practice-timer{font-size:16px;color:var(--color-text-muted);font-family:var(--font-family-mono)}.practice-progress{font-size:14px;color:var(--color-accent);margin-top:5px}.word-list-details{margin-bottom:30px}.word-list-details summary{cursor:pointer;color:var(--color-accent);font-size:14px;padding:10px 0;-webkit-user-select:none;user-select:none}.word-list-details summary:hover{text-decoration:underline}.word-list-details .word-list{margin-top:15px;margin-bottom:0}.word-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:15px}.word-item{background:var(--color-bg-secondary);padding:15px 20px;border-radius:var(--radius-md)}.word-item .word-item-display{font-size:20px;letter-spacing:2px}.practice-area{background:var(--color-bg-secondary);border-radius:var(--radius-xl);padding:40px;text-align:center;cursor:text}.practice-prompt{font-size:18px;color:var(--color-text-secondary);margin-bottom:20px}.practice-word,.diff-display-container{margin-bottom:30px}.practice-input{position:absolute;opacity:0;pointer-events:none}.practice-controls{display:flex;justify-content:center;gap:15px;margin-top:20px}.practice-btn{padding:15px 40px;font-size:18px;border:none;border-radius:var(--radius-md);cursor:pointer;transition:transform .1s}.practice-btn:hover{transform:scale(1.05)}.practice-btn:active{transform:scale(.95)}.practice-btn.reveal{background:var(--color-accent);color:var(--color-bg-primary)}.practice-btn.again{background:var(--color-error);color:#fff}.practice-btn.good{background:var(--color-accent);color:var(--color-bg-primary)}.settings-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000}.settings-modal{background:var(--color-bg-secondary);border-radius:var(--radius-lg);width:90%;max-width:400px;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-card)}.settings-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid var(--color-border)}.settings-header h2{margin:0;font-size:20px;color:var(--color-text-primary)}.settings-close-btn{background:transparent;border:none;color:var(--color-text-secondary);font-size:24px;cursor:pointer;padding:4px 8px;line-height:1;border-radius:var(--radius-sm);transition:color .2s,background .2s}.settings-close-btn:hover{color:var(--color-text-primary);background:var(--color-bg-hover)}.settings-content{padding:24px}.settings-section{margin-bottom:24px}.settings-section:last-child{margin-bottom:0}.settings-section h3{margin:0 0 16px;font-size:14px;font-weight:600;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.5px}.theme-swatches{display:flex;gap:12px;flex-wrap:wrap}.theme-swatch{width:40px;height:40px;border-radius:50%;border:3px solid transparent;cursor:pointer;transition:transform .2s,border-color .2s;position:relative}.theme-swatch:hover{transform:scale(1.1)}.theme-swatch.selected{border-color:var(--color-text-primary)}.theme-swatch.selected:after{content:"✓";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:#000000b3}.summary-modal-overlay{position:fixed;inset:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:1000}.summary-modal{background:var(--color-bg-secondary);border-radius:var(--radius-lg);width:90%;max-width:600px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-card);position:relative;padding:40px 30px 30px}.summary-modal-close-btn{position:absolute;top:12px;right:12px;background:transparent;border:none;color:var(--color-text-secondary);font-size:28px;cursor:pointer;padding:4px 10px;line-height:1;border-radius:var(--radius-sm);transition:color .2s,background .2s}.summary-modal-close-btn:hover{color:var(--color-text-primary);background:var(--color-bg-hover)}.summary-modal-content{text-align:center}.summary-modal-word-display{margin-bottom:20px}.summary-modal-word-display .word-display{font-size:48px;letter-spacing:4px}.summary-modal-definition{font-size:24px;color:var(--color-text-secondary);margin-bottom:30px}.summary-modal-memory-tip{background:var(--color-bg-tertiary);padding:20px;border-radius:var(--radius-md);margin-bottom:30px;font-size:18px;color:var(--color-text-primary)}.summary-modal-memory-tip-label{color:var(--color-accent);text-transform:uppercase;font-size:12px;letter-spacing:2px;margin-bottom:10px}.summary-modal-example{font-style:italic;color:var(--color-text-muted);font-size:18px;margin-bottom:30px}.summary-modal-actions{display:flex;justify-content:center;margin-bottom:20px}.summary-modal-deep-learn-btn{background:var(--color-accent);color:var(--color-bg-primary);border:none;padding:14px 28px;font-size:16px;font-weight:500;border-radius:var(--radius-md);cursor:pointer;transition:transform .2s,opacity .2s}.summary-modal-deep-learn-btn:hover{transform:scale(1.02);opacity:.9}.summary-modal-deep-learn-btn:active{transform:scale(.98)}.summary-modal-nav{display:flex;justify-content:center;gap:20px;margin-bottom:20px}.summary-modal-nav-btn{background:var(--color-bg-tertiary);border:none;color:var(--color-text-primary);padding:12px 24px;font-size:16px;border-radius:var(--radius-md);cursor:pointer;transition:background .2s,transform .2s}.summary-modal-nav-btn:hover:not(:disabled){background:var(--color-bg-hover);transform:translateY(-2px)}.summary-modal-nav-btn:disabled{opacity:.4;cursor:not-allowed}.summary-modal-progress{text-align:center;color:var(--color-text-muted);font-size:14px}.app-container{min-height:100vh}.hidden{display:none!important}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;text-align:center}.empty-state-message{font-size:24px;color:var(--color-text-secondary);margin:0 0 12px}.empty-state-hint{font-size:16px;color:var(--color-text-secondary);opacity:.7;margin:0}