*,:before,:after{box-sizing:border-box}*{margin:0}body{-webkit-font-smoothing:antialiased;line-height:1.5}img,picture,video,canvas,svg{max-width:100%;display:block}input,button,textarea,select{font:inherit}p,h1,h2,h3,h4,h5,h6{overflow-wrap:break-word}#root,#__next{isolation:isolate}:root{--primary-color:#1e40af;--primary-light:#3b82f6;--secondary-color:#28a745;--gold-color:#d4af37;--danger-color:#dc2626;--text-primary:#1f2937;--text-secondary:#4b5563;--text-muted:#9ca3af;--bg-primary:#fff;--bg-secondary:#f9fafb;--bg-tertiary:#e5e7eb;--red-suits:#dc2626;--black-suits:#1f2937;--primary-dark:#1e3f73;--secondary-light:#48c468;--secondary-dark:#1e7e34;--accent-color:#ffc107;--warning-color:#fd7e14;--spacing-xs:.25rem;--spacing-sm:.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--spacing-2xl:3rem;--border-radius:8px;--border-radius-sm:4px;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a}body{color:var(--text-primary);background-color:var(--bg-secondary);font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif}.btn{padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--border-radius);cursor:pointer;justify-content:center;align-items:center;gap:var(--spacing-xs);border:none;font-size:.9rem;font-weight:500;text-decoration:none;transition:all .2s;display:inline-flex}.btn--primary{background:var(--primary-color);color:#fff}.btn--primary:hover{background:var(--primary-light)}.btn--small{padding:var(--spacing-xs) var(--spacing-sm);font-size:.8rem}.app-container{max-width:1200px;padding:var(--spacing-md) var(--spacing-xl);flex-direction:column;min-height:100vh;margin:0 auto;display:flex}.app-header{text-align:center;margin-bottom:var(--spacing-md);padding:var(--spacing-md) var(--spacing-xl);background:var(--bg-primary);border-radius:var(--border-radius);box-shadow:var(--shadow-md)}.app-title{color:var(--gold-color);margin-bottom:var(--spacing-sm);text-shadow:0 2px 4px #d4af3733;word-wrap:break-word;-webkit-hyphens:auto;hyphens:auto;font-size:2.2rem;font-weight:700}.app-subtitle{color:var(--text-secondary);margin-top:0;margin-bottom:0;font-size:1.25rem;font-weight:400}.app-description{color:var(--text-secondary);max-width:700px;margin:0 auto var(--spacing-xl);font-size:1.1rem;line-height:1.7}.main-content{gap:var(--spacing-sm);flex:1;grid-template-columns:1fr;display:grid}.input-section{background:var(--bg-primary);padding:var(--spacing-md);border-radius:var(--border-radius);box-shadow:var(--shadow-md)}.result-section{background:var(--bg-primary);padding:var(--spacing-md);border-radius:var(--border-radius);box-shadow:var(--shadow-md);border-left:4px solid var(--primary-color)}.footer{margin-top:var(--spacing-2xl);text-align:center;color:var(--text-muted);padding:var(--spacing-lg);border-top:1px solid var(--bg-tertiary);font-size:.9rem}.text-input-container{margin-bottom:var(--spacing-lg)}.text-input{width:100%;margin-bottom:var(--spacing-md)}.input-example{color:var(--text-secondary);margin-bottom:var(--spacing-md);text-align:center;font-size:.9rem}.input-example code{background:var(--bg-secondary);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--border-radius-sm);font-family:inherit}.error-message{color:var(--danger-color);text-align:center;margin-bottom:var(--spacing-md);font-weight:500}.result-total{color:var(--gold-color);text-align:center;margin-bottom:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-lg);background:linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));border-radius:var(--border-radius);border:2px solid var(--gold-color);text-shadow:0 2px 4px #d4af3733;font-size:1.3rem;font-weight:700}.breakdown-toggle{background:var(--primary-color);color:#fff;padding:var(--spacing-sm) var(--spacing-lg);align-items:center;gap:var(--spacing-sm);margin:0 auto var(--spacing-xs);font-weight:600;display:inline-flex}.breakdown-toggle:hover:not(:disabled){background:var(--primary-light)}.breakdown-toggle svg{flex-shrink:0}.breakdown-section{margin-top:var(--spacing-lg);padding:var(--spacing-lg);background:var(--bg-secondary);border-radius:var(--border-radius);border:1px solid var(--bg-tertiary);text-align:left}.breakdown-title{color:var(--primary-color);margin-bottom:var(--spacing-lg);text-align:center;border-bottom:2px solid var(--bg-tertiary);padding-bottom:var(--spacing-md);font-size:1.3rem;font-weight:600}.breakdown-category{margin-bottom:var(--spacing-lg);background:var(--bg-primary);padding:var(--spacing-md);border-radius:var(--border-radius-sm);border:1px solid var(--bg-tertiary)}.breakdown-category:last-child{margin-bottom:0}.breakdown-category>strong{color:var(--primary-color);margin-bottom:var(--spacing-md);padding-bottom:var(--spacing-xs);border-bottom:1px solid var(--bg-tertiary);font-size:1.1rem;display:block}.breakdown-list{margin:0;padding:0;list-style:none}.breakdown-list li{padding:var(--spacing-xs) 0;border-bottom:1px solid var(--bg-tertiary);justify-content:space-between;align-items:flex-start;max-width:200px;margin-bottom:0;display:flex}.breakdown-list li:last-child{border-bottom:none}.breakdown-list li:before{content:"•";color:var(--primary-color);margin-right:var(--spacing-sm);flex-shrink:0;font-weight:700}.breakdown-sublist{margin:var(--spacing-sm) 0 0 0;padding:var(--spacing-sm);background:var(--bg-secondary);border-radius:var(--border-radius-sm);list-style:none}.breakdown-sublist li{color:var(--text-secondary);padding:var(--spacing-xs) 0;border-bottom:none;justify-content:flex-start;font-size:.9rem}.breakdown-sublist li:before{content:"→";color:var(--secondary-color);margin-right:var(--spacing-sm)}.breakdown-total{color:var(--primary-color);background:var(--bg-primary);padding:var(--spacing-md);border-radius:var(--border-radius-sm);border:2px solid var(--primary-light);margin:var(--spacing-md) 0 0 0;text-align:center;font-size:1.1rem;font-weight:600}.suit-name{flex-shrink:0;min-width:30px;font-weight:500}.suit-points{color:var(--primary-color);margin-left:auto;font-weight:600}.navigation{background:var(--bg-primary);border-bottom:1px solid var(--bg-tertiary);z-index:100;box-shadow:var(--shadow-sm);position:sticky;top:0}.nav-container{max-width:1200px;padding:0 var(--spacing-lg);justify-content:space-between;align-items:center;height:60px;margin:0 auto;display:flex}.nav-brand{align-items:center;gap:var(--spacing-sm);color:var(--gold-color);font-weight:700;text-decoration:none;display:flex}.nav-brand:hover{color:var(--gold-color)}.nav-logo{width:auto;height:32px;margin-right:var(--spacing-sm);flex-shrink:0}.nav-title{font-size:1.25rem}.mobile-menu-toggle{color:var(--text-primary);padding:var(--spacing-sm);cursor:pointer;background:0 0;border:none;display:none}.nav-menu{align-items:center;gap:var(--spacing-sm);display:flex}.nav-item{align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);color:var(--text-primary);border-radius:var(--border-radius);cursor:pointer;background:0 0;border:none;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-item:hover{background:var(--bg-secondary);color:var(--primary-color)}.nav-item--active{background:var(--primary-color);color:#fff}.nav-item--active:hover{background:var(--primary-light)}.books-section{max-width:1000px;padding:var(--spacing-xl);margin:0 auto}.books-intro{text-align:center;margin-bottom:var(--spacing-2xl);color:var(--text-secondary);font-size:1.1rem;line-height:1.6}.featured-book{background:var(--bg-primary);border-radius:var(--border-radius);box-shadow:var(--shadow-md);margin-bottom:var(--spacing-2xl);padding:var(--spacing-xl);border:2px solid var(--gold-color)}.featured-book-content{gap:var(--spacing-xl);align-items:flex-start;display:flex}.featured-book-image{flex-shrink:0;width:150px}.book-image{width:100%;margin-bottom:var(--spacing-md);justify-content:center;display:flex}.book-cover{border-radius:var(--border-radius-sm);width:120px;height:auto;box-shadow:var(--shadow-md);transition:transform .2s}.book-cover--featured{width:150px}.book-cover:hover{box-shadow:var(--shadow-lg);transform:scale(1.02)}.book-image-placeholder{background:var(--bg-tertiary);border-radius:var(--border-radius-sm);width:120px;height:160px;color:var(--text-muted);border:2px dashed var(--bg-tertiary);justify-content:center;align-items:center;display:flex}.featured-book-image .book-image-placeholder{width:150px;height:200px}.featured-book-info{flex:1}.book-category{background:var(--primary-color);color:#fff;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--border-radius-sm);text-transform:uppercase;letter-spacing:.5px;margin-bottom:var(--spacing-sm);font-size:.8rem;font-weight:600;display:inline-block}.book-category--featured{background:var(--gold-color);color:var(--text-primary)}.featured-book-title{color:var(--text-primary);margin:var(--spacing-sm) 0;font-size:1.75rem;font-weight:700}.featured-book-author{color:var(--text-secondary);margin-bottom:var(--spacing-md);font-size:1.1rem;font-weight:500}.featured-book-description{color:var(--text-secondary);margin-bottom:var(--spacing-md);font-size:1.05rem;line-height:1.6}.books-grid-section{margin-top:var(--spacing-2xl)}.books-grid-section h3{color:var(--text-primary);margin-bottom:var(--spacing-xl);text-align:center;font-size:1.5rem;font-weight:700}.books-grid{gap:var(--spacing-xl);grid-template-columns:repeat(auto-fit,minmax(300px,1fr));display:grid}.book-card{background:var(--bg-primary);border-radius:var(--border-radius);box-shadow:var(--shadow-md);padding:var(--spacing-lg);border:1px solid var(--bg-tertiary);flex-direction:column;transition:all .2s;display:flex}.book-info{flex-direction:column;height:100%;display:flex}.book-title{color:var(--text-primary);margin:var(--spacing-sm) 0;font-size:1.25rem;font-weight:700;line-height:1.3}.book-author{color:var(--text-secondary);margin-bottom:var(--spacing-md);font-weight:500}.book-description{color:var(--text-secondary);margin-bottom:var(--spacing-md);flex:1;line-height:1.6}.amazon-button{align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);color:#232f3e;border-radius:var(--border-radius);cursor:pointer;margin-top:var(--spacing-md);box-shadow:var(--shadow-sm);background:#f90;border:none;font-size:.9rem;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.amazon-button:hover{box-shadow:var(--shadow-md);color:#232f3e;background:#ffad33;transform:translateY(-1px)}.amazon-button:active{box-shadow:var(--shadow-sm);transform:translateY(0)}.amazon-button--featured{padding:var(--spacing-md) var(--spacing-lg);font-size:1rem;font-weight:700}.amazon-button svg{flex-shrink:0}@media (max-width:768px){.article-page{padding:var(--spacing-lg)}.article-title{font-size:2rem}.article-share{align-items:flex-start;gap:var(--spacing-sm);flex-direction:column}.nav-menu{display:none}.nav-menu--open{background:var(--bg-primary);border-top:1px solid var(--bg-tertiary);padding:var(--spacing-md);z-index:1000;flex-direction:column;display:flex;position:absolute;top:100%;left:0;right:0;box-shadow:0 4px 6px #0000001a}.mobile-menu-toggle{display:block}.books-grid,.articles-grid{grid-template-columns:1fr}.article-footer{align-items:flex-start;gap:var(--spacing-md);flex-direction:column}.article-actions{flex-direction:column;align-items:stretch}.share-buttons{justify-content:center}.featured-book-content{text-align:center;flex-direction:column;align-items:center}.featured-book-image{width:auto}.book-cover--featured{width:120px}.featured-book-image .book-image-placeholder{width:120px;height:160px}}.practice-container{max-width:800px;padding:var(--spacing-xl);background:var(--bg-primary);border-radius:var(--border-radius);box-shadow:var(--shadow-md);margin:0 auto}.practice-header{text-align:center;margin-bottom:var(--spacing-xl)}.practice-header h1{color:var(--primary-color);margin-bottom:var(--spacing-md)}.progress{align-items:center;gap:var(--spacing-sm);flex-direction:column;display:flex}.progress-bar{background:var(--bg-tertiary);border-radius:4px;width:100%;max-width:300px;height:8px;overflow:hidden}.progress-fill{background:var(--primary-color);height:100%;transition:width .3s}.practice-content{gap:var(--spacing-xl);flex-direction:column;display:flex}.hand-section{text-align:center;background:var(--bg-secondary);padding:var(--spacing-xl);border-radius:var(--border-radius);margin-bottom:var(--spacing-xl);border:1px solid var(--bg-tertiary)}.hand-section h2{color:var(--primary-color);margin-bottom:var(--spacing-lg);justify-content:center;align-items:center;gap:var(--spacing-sm);font-size:1.4rem;font-weight:600;display:flex}.hand-section h2:before{content:"🎯";font-size:1.2rem}.score-summary{text-align:center;margin-bottom:var(--spacing-xl)}.score-display{background:var(--bg-secondary);padding:var(--spacing-xl);border-radius:var(--border-radius);margin-bottom:var(--spacing-lg)}.score-display h2{color:var(--primary-color);margin-bottom:var(--spacing-md)}.percentage{color:var(--secondary-color);font-size:3rem;font-weight:700}.score-breakdown{gap:var(--spacing-sm);max-width:600px;margin:0 auto;display:grid}.hand-result{gap:var(--spacing-md);padding:var(--spacing-md);border-radius:var(--border-radius-sm);grid-template-columns:1fr 1fr 1fr auto;align-items:center;display:grid}.hand-result.clickable{cursor:pointer;border:1px solid #0000;transition:all .2s}.hand-result.clickable:hover{box-shadow:var(--shadow-md);border-color:var(--primary-color);transform:translateY(-1px)}.hand-result.clickable:active{transform:translateY(0)}.hand-result.correct{border-left:4px solid var(--secondary-color);background:#28a7451a}.hand-result.incorrect{border-left:4px solid var(--danger-color);background:#dc26261a}.result-icon{font-size:1.2rem;font-weight:700}.hand-result.correct .result-icon{color:var(--secondary-color)}.hand-result.incorrect .result-icon{color:var(--danger-color)}.review-content{margin-bottom:var(--spacing-xl)}.answer-comparison{gap:var(--spacing-md);margin:var(--spacing-xl) 0;padding:var(--spacing-lg);background:var(--bg-secondary);border-radius:var(--border-radius);flex-direction:column;display:flex}.user-answer,.correct-answer{padding:var(--spacing-md);border-radius:var(--border-radius-sm)}.user-answer.correct{border:1px solid var(--secondary-color);background:#28a7451a}.user-answer.incorrect{border:1px solid var(--danger-color);background:#dc26261a}.correct-answer{background:var(--bg-primary);border:1px solid var(--bg-tertiary)}.result-indicator{padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--border-radius-sm);text-align:center;font-weight:700}.result-indicator.correct{background:var(--secondary-color);color:#fff}.result-indicator.incorrect{background:var(--danger-color);color:#fff}.practice-actions,.review-navigation{gap:var(--spacing-md);flex-wrap:wrap;justify-content:center;display:flex}.nav-button,.review-button,.new-session-button{padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--border-radius);cursor:pointer;border:none;font-size:1rem;font-weight:500;transition:all .2s}.nav-button.primary,.new-session-button{background:var(--primary-color);color:#fff}.nav-button.primary:hover,.new-session-button:hover{background:var(--primary-light)}.nav-button.secondary{background:var(--bg-tertiary);color:var(--text-primary)}.nav-button.secondary:hover{background:var(--text-muted)}.nav-button:disabled{opacity:.5;cursor:not-allowed}.review-button{background:var(--secondary-color);color:#fff}.review-button:hover{background:var(--secondary-dark)}.practice-loading{text-align:center;padding:var(--spacing-2xl);color:var(--text-secondary)}@media (max-width:768px){.practice-container{padding:var(--spacing-md);margin:var(--spacing-md)}.answer-input-group{gap:var(--spacing-md);flex-direction:column}.answer-input{width:200px}.hand-result{text-align:center;gap:var(--spacing-xs);grid-template-columns:1fr}.practice-actions,.review-navigation{flex-direction:column;align-items:center}.nav-button,.review-button,.new-session-button{width:100%;max-width:250px}}.hand-selector{background:var(--bg-secondary);padding:var(--spacing-lg);border-radius:var(--border-radius);margin-bottom:var(--spacing-xl);text-align:center}.hand-selector-title{color:var(--text-primary);margin-bottom:var(--spacing-md);font-size:1rem;font-weight:500}.hand-selector-buttons{gap:var(--spacing-sm);flex-wrap:wrap;justify-content:center;display:flex}.hand-selector-button{border-radius:var(--border-radius);cursor:pointer;border:2px solid #0000;justify-content:center;align-items:center;width:40px;height:40px;font-size:1rem;font-weight:600;transition:all .2s;display:flex}.hand-selector-button.correct{background:var(--secondary-color);color:#fff}.hand-selector-button.correct:hover{background:var(--secondary-dark);box-shadow:var(--shadow-md);transform:translateY(-1px)}.hand-selector-button.incorrect{background:var(--danger-color);color:#fff}.hand-selector-button.incorrect:hover{box-shadow:var(--shadow-md);background:#b91c26;transform:translateY(-1px)}.hand-selector-button.active{border-color:var(--primary-color);box-shadow:0 0 0 2px #1e40af33}.hand-selector-button.correct.active{border-color:var(--bg-primary);box-shadow:0 0 0 3px var(--secondary-color)}.hand-selector-button.incorrect.active{border-color:var(--bg-primary);box-shadow:0 0 0 3px var(--danger-color)}.answer-section{text-align:center;background:var(--bg-secondary);padding:var(--spacing-xl);border-radius:var(--border-radius);border:1px solid var(--bg-tertiary)}.answer-section label{margin-bottom:var(--spacing-lg);color:var(--primary-color);font-size:1.2rem;font-weight:600;display:block}.answer-input-group{gap:var(--spacing-lg);margin-bottom:var(--spacing-lg);justify-content:center;align-items:center;display:flex}.answer-input{padding:var(--spacing-lg);border:2px solid var(--bg-tertiary);border-radius:var(--border-radius);text-align:center;width:180px;box-shadow:var(--shadow-sm);font-size:1.3rem;font-weight:600;transition:all .2s}.answer-input:focus{border-color:var(--primary-color);outline:none;transform:translateY(-1px);box-shadow:0 0 0 3px #1e40af1a}.submit-button{padding:var(--spacing-lg) var(--spacing-xl);background:var(--primary-color);color:#fff;border-radius:var(--border-radius);cursor:pointer;box-shadow:var(--shadow-md);border:none;min-width:120px;font-size:1.1rem;font-weight:600;transition:all .2s}.submit-button:hover{background:var(--primary-light);box-shadow:var(--shadow-lg);transform:translateY(-1px)}.submit-button:active{box-shadow:var(--shadow-sm);transform:translateY(0)}.hint{color:var(--text-secondary);margin-top:var(--spacing-lg);background:var(--bg-primary);padding:var(--spacing-md);border-radius:var(--border-radius-sm);border-left:4px solid var(--primary-color);font-size:1rem;font-style:italic}.score-feedback{background:var(--bg-secondary);padding:var(--spacing-xl);border-radius:var(--border-radius);margin-bottom:var(--spacing-lg);border-left:4px solid var(--primary-color);text-align:left}.score-feedback h3{margin:0 0 var(--spacing-sm) 0;font-size:1.3rem;font-weight:600}.score-feedback p{color:var(--text-secondary);margin:0;font-size:1rem;line-height:1.5}.feedback-perfect{border-left-color:var(--gold-color);background:linear-gradient(135deg,#f0f9ff 0%,#e0f2fe 100%)}.feedback-perfect h3{color:var(--gold-color)}.feedback-excellent{border-left-color:var(--secondary-color);background:linear-gradient(135deg,#f0fdf4 0%,#dcfce7 100%)}.feedback-excellent h3{color:var(--secondary-color)}.feedback-good{border-left-color:var(--primary-color);background:linear-gradient(135deg,#eff6ff 0%,#dbeafe 100%)}.feedback-good h3{color:var(--primary-color)}.feedback-progress{border-left-color:var(--accent-color);background:linear-gradient(135deg,#fefce8 0%,#fef3c7 100%)}.feedback-progress h3{color:#d97706}.feedback-learning{background:linear-gradient(135deg,#fdf4ff 0%,#fae8ff 100%);border-left-color:#a855f7}.feedback-learning h3{color:#a855f7}.feedback-practice{border-left-color:var(--warning-color);background:linear-gradient(135deg,#fff7ed 0%,#fed7aa 100%)}.feedback-practice h3{color:var(--warning-color)}.feedback-basics{border-left-color:var(--danger-color);background:linear-gradient(135deg,#fef2f2 0%,#fecaca 100%)}.feedback-basics h3{color:var(--danger-color)}