*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--secondary: #0ea5e9;--accent: #f59e0b;--success: #10b981;--success-light: #d1fae5;--error: #ef4444;--error-light: #fee2e2;--warning: #f59e0b;--bg-dark: #000000;--bg-card: #111111;--bg-light: #1a1a1a;--bg-hover: #2a2a2a;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--card-red: #dc2626;--card-black: #1e293b;--border-radius: 12px;--border-radius-lg: 20px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3), 0 2px 4px -2px rgba(0, 0, 0, .2);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .3), 0 4px 6px -4px rgba(0, 0, 0, .2)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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ease}.card:hover{transform:translateY(-2px)}.card.large{width:160px;height:224px;font-size:2rem}.card.medium{width:100px;height:140px;font-size:1.25rem}.card.small{width:60px;height:84px;font-size:.875rem}.card.tiny{width:45px;height:63px;font-size:.7rem}.card.mini{width:36px;height:50px;font-size:.6rem}.card.red{color:var(--card-red)}.card.black{color:var(--card-black)}.card-corner{position:absolute;display:flex;flex-direction:column;align-items:center;line-height:1.1}.card-corner.top-left{top:6px;left:6px}.card-corner.bottom-right{bottom:6px;right:6px;transform:rotate(180deg)}.card-value{font-weight:700}.card-suit{font-size:.8em}.card-center{display:flex;align-items:center;justify-content:center}.card-suit-large{font-size:2.5em}.card.tiny .card-corner,.card.mini .card-corner{display:none}.card.tiny .card-suit-large,.card.mini .card-suit-large{font-size:1.5em}.card.tiny .card-center:before,.card.mini .card-center:before{content:attr(data-value);position:absolute;top:2px;left:4px;font-size:.6rem;font-weight:700}.card-back{background:linear-gradient(145deg,#1e40af,#3730a3);display:flex;align-items:center;justify-content:center}.card-back-pattern{font-size:3rem;opacity:.3}.home{padding:24px;max-width:800px;margin:0 auto;width:100%;min-height:100vh;display:flex;flex-direction:column}.wizard-mode .wizard-step{flex:1;display:flex;flex-direction:column;animation:slideUp .3s ease forwards}.wizard-progress{text-align:center;margin-bottom:24px}.step-indicators{display:flex;justify-content:center;gap:12px;margin-bottom:16px}.step-dot{width:10px;height:10px;border-radius:50%;background:var(--bg-light);transition:all .3s ease}.step-dot.active{background:var(--primary)}.step-dot.current{transform:scale(1.3);box-shadow:0 0 10px #6366f180}.step-title{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin:0}.wizard-nav{display:flex;gap:12px;margin-top:auto;padding-top:24px}.wizard-nav.single{justify-content:center}.wizard-nav.single .wizard-btn{max-width:200px}.wizard-btn{flex:1;padding:16px 24px;border:none;border-radius:var(--border-radius);font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease}.wizard-btn.back{background:var(--bg-card);color:var(--text-secondary)}.wizard-btn.back:hover{background:var(--bg-light);color:var(--text-primary)}.wizard-btn.next{background:var(--primary);color:#fff}.wizard-btn.next:hover{background:var(--primary-dark);transform:translateY(-2px)}.wizard-btn.start{background:linear-gradient(135deg,var(--success) 0%,#059669 100%);color:#fff}.wizard-btn.start:hover{transform:translateY(-2px);box-shadow:0 4px 15px #10b98166}.welcome-step{justify-content:center;align-items:center;text-align:center}.welcome-step .quick-stats{margin-bottom:32px}.welcome-step 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.stat-value{display:block;font-size:1.75rem;font-weight:700;color:var(--primary-light)}.stat-item .stat-label{font-size:.85rem;color:var(--text-secondary)}.setup-section{margin-bottom:28px}.setup-section h2{font-size:1.1rem;font-weight:600;margin-bottom:12px;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;text-align:center}.deck-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}.deck-card{background:var(--bg-card);border:2px solid transparent;border-radius:var(--border-radius);padding:16px;text-align:center;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;gap:10px}.deck-card:hover{background:var(--bg-light);transform:translateY(-2px);box-shadow:0 4px 12px #0000004d}.deck-card.selected{border-color:var(--primary);background:#6366f11a;box-shadow:0 0 20px #6366f166,0 0 40px #6366f133}.deck-card .deck-name{font-weight:600;font-size:1.05rem;color:var(--text-primary)}.deck-card .deck-description{font-size:.75rem;color:var(--text-muted);background:#0000004d;padding:8px 10px;border-radius:8px;line-height:1.4}.deck-card.custom{border-style:dashed;border-color:var(--bg-hover)}.deck-card.add-custom{border:2px dashed var(--bg-hover);background:transparent}.deck-card.add-custom:hover{border-color:var(--primary);background:#6366f10d}.mode-grid,.time-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}.mode-card,.time-card{flex:0 1 180px;min-width:150px;background:var(--bg-card);border:2px solid transparent;border-radius:var(--border-radius);padding:16px;text-align:center;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;gap:10px}.mode-card:hover,.time-card:hover{background:var(--bg-light);transform:translateY(-2px);box-shadow:0 4px 12px #0000004d}.mode-card.selected,.time-card.selected{border-color:var(--primary);background:#6366f11a;box-shadow:0 0 20px #6366f166,0 0 40px #6366f133}.mode-name,.time-name{font-weight:600;display:block;color:var(--text-primary);font-size:1rem}.mode-description,.time-description{font-size:.75rem;color:var(--text-muted);background:#0000004d;padding:8px 10px;border-radius:8px;line-height:1.4}.question-count{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.count-btn{flex:0 1 auto;min-width:80px;padding:14px 24px;background:var(--bg-card);border:2px solid transparent;border-radius:var(--border-radius);color:var(--text-primary);font-weight:600;cursor:pointer;transition:all .2s ease}.count-btn:hover{background:var(--bg-light)}.count-btn.selected{border-color:var(--primary);background:#6366f11a;box-shadow:0 0 20px #6366f166,0 0 40px #6366f133}.start-btn{width:100%;padding:18px 32px;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 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.stat-label{font-size:.75rem;color:var(--text-muted);display:block}.quiz-stats .stat-value{font-weight:700;font-size:1.1rem}.quiz-stats .stat.streak .stat-value{color:var(--warning)}.total-timer{font-size:1.5rem;font-weight:700;font-variant-numeric:tabular-nums}.total-timer.warning{color:var(--error);animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.progress-bar{height:4px;background:var(--bg-card)}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary) 0%,var(--secondary) 100%);transition:width .3s ease}.quiz-main{flex:1;display:flex;flex-direction:column;align-items:center;padding:24px;max-width:500px;margin:0 auto;width:100%}.question-info{color:var(--text-muted);font-size:.9rem;margin-bottom:8px}.question-timer{font-size:2rem;font-weight:700;color:var(--primary-light);margin-bottom:16px}.question-timer.warning{color:var(--error);animation:pulse .5s infinite}.question-area{text-align:center;margin-bottom:32px;display:flex;flex-direction:column;align-items:center}.question-text{font-size:1.3rem;color:var(--text-secondary);margin-bottom:20px}.position-display{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);width:140px;height:140px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto;box-shadow:var(--shadow-lg)}.position-number{font-size:3.5rem;font-weight:800;color:#fff}.answer-area{width:100%;text-align:center}.answer-input{width:100%;padding:16px 20px;font-size:1.2rem;background:var(--bg-card);border:2px solid var(--bg-light);border-radius:var(--border-radius);color:var(--text-primary);text-align:center;transition:border-color .2s}.answer-input:focus{outline:none;border-color:var(--primary)}.answer-input:disabled{opacity:.6}.answer-input.correct{border-color:var(--success);background:#10b9811a}.answer-input.incorrect{border-color:var(--error);background:#ef44441a;animation:shake .4s ease}.number-display{width:100%;padding:16px 20px;font-size:2rem;font-weight:700;background:var(--bg-card);border:2px solid var(--bg-light);border-radius:var(--border-radius);color:var(--text-primary);text-align:center;min-height:64px;display:flex;align-items:center;justify-content:center}.number-display .placeholder{color:var(--text-muted);font-weight:400;font-size:1.2rem}.number-display.correct{border-color:var(--success);background:#10b9811a;animation:pulseGreen .5s ease}.number-display.incorrect{border-color:var(--error);background:#ef44441a;animation:shake .4s ease}.number-pad{margin-top:16px;display:flex;flex-direction:column;gap:8px;max-width:280px;margin-left:auto;margin-right:auto}.number-pad-row{display:flex;gap:8px;justify-content:center}.pad-btn{width:70px;height:56px;font-size:1.5rem;font-weight:600;background:var(--bg-card);border:2px solid var(--bg-light);border-radius:12px;color:var(--text-primary);cursor:pointer;transition:all .15s ease}.pad-btn:hover{background:var(--bg-light);transform:scale(1.05)}.pad-btn:focus{outline:none}.pad-btn:active{transform:scale(.95);background:var(--bg-hover)}.pad-btn.clear{background:#ef444426;color:#ef4444;border-color:#ef44444d}.pad-btn.clear:hover{background:#ef444440}.pad-btn.delete{background:var(--bg-light);color:var(--text-secondary)}.card-pad{margin-top:16px;text-align:center}.pad-label{color:var(--text-secondary);font-size:.9rem;margin-bottom:12px}.pad-label strong{color:var(--primary-light);font-size:1.1rem}.value-pad{display:flex;flex-direction:column;gap:8px;max-width:320px;margin:0 auto}.value-pad-row{display:flex;gap:8px;justify-content:center}.value-btn{width:54px;height:50px;font-size:1.3rem}.suit-selection-header{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:12px}.back-btn-small{width:36px;height:36px;background:var(--bg-card);border:1px solid var(--bg-light);border-radius:8px;color:var(--text-secondary);font-size:1.2rem;cursor:pointer;transition:all .2s}.back-btn-small:hover{background:var(--bg-light);color:var(--text-primary)}.back-btn-small:focus{outline:none}.suit-pad{display:flex;gap:12px;justify-content:center;max-width:320px;margin:0 auto}.suit-btn{width:70px;height:70px;font-size:2.5rem;display:flex;align-items:center;justify-content:center}.suit-btn.red:hover{border-color:#ef4444;background:#ef444426}.suit-btn.black:hover{border-color:var(--text-primary);background:#ffffff1a}.answer-input::placeholder{color:var(--text-muted)}.feedback{margin-top:16px;padding:12px 20px;border-radius:var(--border-radius);font-weight:600;font-size:1.1rem}.feedback.correct{background:var(--success-light);color:var(--success);animation:pulseGreen .5s ease}.feedback.incorrect,.feedback.timeout{background:var(--error-light);color:var(--error);animation:shake .4s ease}@keyframes pulseGreen{0%{transform:scale(1);box-shadow:0 0 #10b981b3}50%{transform:scale(1.05);box-shadow:0 0 20px 10px #10b9814d}to{transform:scale(1);box-shadow:0 0 #10b98100}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-6px)}80%{transform:translate(6px)}}.answer-reveal{margin-top:20px;padding:16px;background:var(--bg-card);border-radius:var(--border-radius)}.answer-reveal p{font-size:1.1rem;color:var(--text-secondary)}.answer-reveal strong{color:var(--text-primary);font-size:1.3rem}.revealed-card{display:flex;justify-content:center;margin-top:8px}.action-buttons{margin-top:24px;width:100%}.submit-btn,.next-btn{width:100%;padding:16px;font-size:1.1rem;font-weight:600;border:none;border-radius:var(--border-radius);cursor:pointer;transition:all .2s ease}.submit-btn{background:var(--primary);color:#fff}.submit-btn:hover:not(:disabled){background:var(--primary-dark)}.submit-btn:disabled{opacity:.5;cursor:not-allowed}.next-btn{background:var(--success);color:#fff}.next-btn:hover{background:#059669}.auto-advance-indicator{text-align:center;color:var(--text-muted);font-size:1rem;padding:16px;animation:pulse 1s ease infinite}.results{padding:24px;max-width:600px;margin:0 auto;width:100%}.results-header{text-align:center;margin-bottom:24px;display:flex;flex-direction:column;align-items:center;gap:8px}.results-header .back-btn{position:absolute;left:20px;top:20px}.results-header h1{font-size:1.75rem;font-weight:700}.results-header .deck-name{color:var(--text-secondary)}.score-display{text-align:center;margin-bottom:32px}.grade-circle{width:120px;height:120px;border:6px solid;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 12px}.grade{font-size:3rem;font-weight:800}.grade-label{font-size:1.2rem;color:var(--text-secondary)}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:32px}.stat-card{background:var(--bg-card);padding:20px;border-radius:var(--border-radius);text-align:center}.stat-card .stat-icon{font-size:1.5rem;display:block;margin-bottom:4px}.stat-card .stat-value{font-size:1.75rem;font-weight:700;display:block}.stat-card .stat-label{font-size:.85rem;color:var(--text-muted)}.review-section{margin-bottom:32px}.review-section h2{font-size:1.1rem;font-weight:600;margin-bottom:16px;color:var(--text-secondary)}.mistakes-list{display:flex;flex-direction:column;gap:12px}.mistake-item{background:var(--bg-card);padding:16px;border-radius:var(--border-radius);display:flex;align-items:center;gap:16px}.mistake-question{flex-shrink:0}.position-badge{background:var(--bg-light);padding:8px 12px;border-radius:8px;font-weight:700;font-size:1.1rem}.mistake-answers{flex:1}.mistake-answers .label{font-size:.75rem;color:var(--text-muted);display:block}.mistake-answers .value{font-weight:600}.mistake-answers .value.wrong{color:var(--error)}.mistake-answers .value.correct{color:var(--success)}.your-answer{margin-bottom:4px}.results-actions{display:flex;flex-direction:column;gap:12px}.action-btn{padding:16px;font-size:1.1rem;font-weight:600;border:none;border-radius:var(--border-radius);cursor:pointer;transition:all .2s ease}.action-btn.primary{background:var(--primary);color:#fff}.action-btn.primary:hover{background:var(--primary-dark)}.action-btn.secondary{background:var(--bg-card);color:var(--text-primary)}.action-btn.secondary:hover{background:var(--bg-light)}.overall-stats .results-header{position:relative;padding-top:20px}.overall-stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:32px}.big-stat-card{background:var(--bg-card);padding:24px;border-radius:var(--border-radius-lg);text-align:center}.big-stat-value{font-size:2.5rem;font-weight:800;display:block;background:linear-gradient(135deg,var(--primary-light) 0%,var(--secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.big-stat-label{font-size:.9rem;color:var(--text-muted)}.deck-stats-section h2{font-size:1.1rem;font-weight:600;margin-bottom:12px;color:var(--text-secondary)}.deck-stats-list{display:flex;flex-direction:column;gap:8px;margin-bottom:24px}.deck-stat-item{background:var(--bg-card);padding:14px 16px;border-radius:var(--border-radius);display:flex;justify-content:space-between;align-items:center}.deck-stat-name{font-weight:600;text-transform:capitalize}.deck-stat-details{display:flex;gap:16px;color:var(--text-muted);font-size:.9rem}.custom-deck{padding:24px;max-width:900px;margin:0 auto;width:100%}.custom-deck-header{display:flex;align-items:center;gap:16px;margin-bottom:24px}.custom-deck-header h1{font-size:1.5rem;font-weight:700}.existing-decks{margin-bottom:32px}.existing-decks h2{font-size:1rem;font-weight:600;margin-bottom:12px;color:var(--text-secondary)}.custom-deck-list{display:flex;flex-direction:column;gap:8px}.custom-deck-item{background:var(--bg-card);padding:14px 16px;border-radius:var(--border-radius);display:flex;justify-content:space-between;align-items:center}.custom-deck-name{font-weight:600}.custom-deck-actions{display:flex;gap:8px}.custom-deck-actions button{padding:8px 16px;border:none;border-radius:8px;cursor:pointer;font-weight:500;background:var(--bg-light);color:var(--text-primary);transition:background .2s}.custom-deck-actions button:hover{background:var(--bg-hover)}.custom-deck-actions button.delete{background:#ef44441a;color:var(--error)}.custom-deck-actions button.delete:hover{background:#ef444433}.deck-builder{background:var(--bg-card);padding:24px;border-radius:var(--border-radius-lg)}.deck-name-input{margin-bottom:20px}.deck-name-input label{display:block;font-size:.9rem;font-weight:500;margin-bottom:8px;color:var(--text-secondary)}.deck-name-input input{width:100%;padding:12px 16px;font-size:1rem;background:var(--bg-dark);border:2px solid var(--bg-light);border-radius:var(--border-radius);color:var(--text-primary);transition:border-color .2s}.deck-name-input input:focus{outline:none;border-color:var(--primary)}.stack-progress{margin-bottom:24px}.progress-info{display:flex;justify-content:space-between;font-size:.9rem;margin-bottom:8px;color:var(--text-secondary)}.builder-layout{display:flex;flex-direction:column;gap:24px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.section-header h3{font-size:1rem;font-weight:600}.helper-text{font-size:.85rem;color:var(--text-muted);margin-bottom:12px}.clear-btn,.toggle-btn{padding:6px 12px;font-size:.8rem;background:var(--bg-light);border:none;border-radius:6px;color:var(--text-secondary);cursor:pointer;transition:all .2s}.clear-btn:hover,.toggle-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.position-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:8px;max-height:350px;overflow-y:auto;padding:12px;background:var(--bg-dark);border-radius:var(--border-radius)}.position-slot{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px;background:var(--bg-light);border:2px solid transparent;border-radius:8px;cursor:pointer;transition:all .2s;min-height:80px}.position-slot:hover{background:var(--bg-hover)}.position-slot.selected{border-color:var(--primary);background:#6366f126}.position-slot.filled{background:var(--bg-hover)}.slot-number{font-size:.75rem;font-weight:700;color:var(--text-muted)}.position-slot.selected .slot-number{color:var(--primary-light)}.slot-empty{font-size:1.2rem;color:var(--text-muted)}.slot-card{position:relative}.slot-card-notation{font-weight:700;font-size:.85rem;letter-spacing:.5px}.slot-card-notation.red{color:#ef4444}.slot-card-notation.black{color:var(--text-primary)}.clear-slot-btn{position:absolute;top:-6px;right:-6px;width:18px;height:18px;padding:0;background:var(--error);border:none;border-radius:50%;color:#fff;font-size:.65rem;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .2s}.position-slot:hover .clear-slot-btn{opacity:1}.card-selection{background:var(--bg-dark);padding:20px;border-radius:var(--border-radius)}.selection-prompt{text-align:center;color:var(--text-secondary);margin-bottom:16px;font-size:1rem}.selection-prompt strong{color:var(--primary-light);font-size:1.2rem}.value-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;max-width:350px;margin:0 auto}.value-btn{padding:16px 8px;background:var(--bg-card);border:2px solid var(--bg-light);border-radius:10px;color:var(--text-primary);font-size:1.25rem;font-weight:700;cursor:pointer;transition:all .2s ease}.value-btn:hover:not(:disabled){border-color:var(--primary);background:#6366f126;transform:translateY(-2px)}.value-btn.unavailable{opacity:.3;cursor:not-allowed}.suit-selection{text-align:center}.back-to-values{background:var(--bg-card);border:none;border-radius:8px;padding:8px 16px;color:var(--text-secondary);cursor:pointer;margin-bottom:16px;transition:all .2s}.back-to-values:hover{background:var(--bg-light);color:var(--text-primary)}.suit-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;max-width:300px;margin:0 auto 20px}.suit-btn{padding:20px 16px;background:var(--bg-card);border:2px solid var(--bg-light);border-radius:12px;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;gap:4px}.suit-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px #0000004d}.suit-btn.red{color:#ef4444}.suit-btn.red:hover:not(:disabled){border-color:#ef4444;background:#ef44441a}.suit-btn.black{color:var(--text-primary)}.suit-btn.black:hover:not(:disabled){border-color:var(--text-primary);background:#ffffff0d}.suit-btn.unavailable{opacity:.3;cursor:not-allowed}.suit-symbol{font-size:2rem}.suit-name{font-size:.85rem;font-weight:500}.preview-card{margin-top:16px;display:flex;flex-direction:column;align-items:center;gap:8px}.preview-card p{color:var(--text-muted);font-size:.85rem}.no-cards-message{text-align:center;color:var(--text-muted);padding:20px}.builder-actions{margin-top:24px;display:flex;gap:12px}.save-deck-btn{flex:1;padding:16px;font-size:1.1rem;font-weight:600;background:var(--primary);border:none;border-radius:var(--border-radius);color:#fff;cursor:pointer;transition:all .2s}.save-deck-btn:hover:not(:disabled){background:var(--primary-dark)}.save-deck-btn:disabled{opacity:.5;cursor:not-allowed}.cancel-btn{padding:16px 24px;font-size:1rem;font-weight:500;background:var(--bg-light);border:none;border-radius:var(--border-radius);color:var(--text-primary);cursor:pointer;transition:background .2s}.cancel-btn:hover{background:var(--bg-hover)}.settings{padding:24px;max-width:600px;margin:0 auto;width:100%}.settings-header{display:flex;align-items:center;gap:16px;margin-bottom:32px}.settings-header h1{font-size:1.5rem;font-weight:700}.settings-section{margin-bottom:16px}.settings-item{background:var(--bg-card);padding:16px 20px;border-radius:var(--border-radius);display:flex;justify-content:space-between;align-items:center;gap:16px}.settings-item-info{display:flex;flex-direction:column;gap:4px}.settings-item-title{font-weight:600;color:var(--text-primary)}.settings-item-description{font-size:.85rem;color:var(--text-muted)}.settings-btn-group{display:flex;align-items:center;gap:12px}.reset-indicator{color:#10b981;font-weight:600;font-size:.9rem;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translate(10px)}to{opacity:1;transform:translate(0)}}.settings-btn{padding:10px 20px;background:var(--bg-light);border:none;border-radius:8px;color:var(--text-primary);font-weight:500;cursor:pointer;transition:all .2s ease;white-space:nowrap}.settings-btn:hover{background:var(--bg-hover)}.settings-btn.danger{background:#ef444426;color:#ef4444}.settings-btn.danger:hover{background:#ef444440}.about{min-height:100vh;background:var(--bg-dark);padding:20px 20px 60px}.about-header{display:flex;align-items:center;gap:16px;margin-bottom:32px}.about-header h1{font-size:1.5rem;color:var(--text-primary)}.about-content{max-width:600px;margin:0 auto}.about-section{background:var(--bg-card);border-radius:var(--border-radius);padding:24px;margin-bottom:20px}.about-section h2{font-size:1.2rem;color:var(--primary-light);margin-bottom:16px;padding-bottom:8px;border-bottom:1px solid var(--bg-light)}.about-section p{color:var(--text-secondary);line-height:1.6;margin-bottom:12px}.about-section p:last-child{margin-bottom:0}.how-to-list{display:flex;flex-direction:column;gap:20px}.how-to-item{display:flex;gap:16px;align-items:flex-start}.step-num{width:32px;height:32px;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;flex-shrink:0}.how-to-item>div{flex:1}.how-to-item strong{color:var(--text-primary);display:block;margin-bottom:6px}.how-to-item p{margin-bottom:6px;font-size:.95rem}.credits-list{list-style:none;padding:0;margin:12px 0}.credits-list li{color:var(--text-secondary);padding:8px 0;border-bottom:1px solid var(--bg-light)}.credits-list li:last-child{border-bottom:none}.credits-list strong{color:var(--text-primary)}.credits-note{font-size:.85rem;color:var(--text-muted);font-style:italic;margin-top:16px}.email-link{color:var(--primary-light);text-decoration:none;font-weight:500}.email-link:hover{text-decoration:underline}@media (max-width: 640px){.home{padding:16px}.logo h1{font-size:1.5rem}.quick-stats{gap:16px;padding:16px}.stat-item .stat-value{font-size:1.5rem}.deck-grid{grid-template-columns:1fr}.mode-card,.time-card{flex:1 1 calc(50% - 6px);min-width:unset;max-width:calc(50% - 6px)}.card.large{width:120px;height:168px;font-size:1.5rem}.position-display{width:100px;height:100px}.position-number{font-size:2.5rem}.quiz-main,.results,.custom-deck,.deck-builder{padding:16px}}