:root{--color-primary: #667eea;--color-secondary: #764ba2;--color-accent: #FF5A5F;--color-success: #4CAF50;--color-warning: #FF9800;--color-info: #2196F3;--color-surface: #ffffff;--color-surface-alt: #f8f9fa;--color-text: #333333;--color-text-light: #666666;--color-border: #e0e0e0;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--shadow-sm: 0 4px 6px rgba(0, 0, 0, .07);--shadow-md: 0 8px 25px rgba(0, 0, 0, .1);--shadow-lg: 0 15px 40px rgba(0, 0, 0, .15);--transition: all .3s ease}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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#667eea4d}button:active,.app-button:active{transform:translateY(0)}button.secondary,.app-button.secondary{background:linear-gradient(135deg,var(--color-warning),#F57C00)}button.success,.app-button.success{background:linear-gradient(135deg,var(--color-success),#2E7D32)}button.danger,.app-button.danger{background:linear-gradient(135deg,var(--color-accent),#D32F2F)}@media(max-width:992px){.header-inner{flex-direction:column;text-align:center}.main-nav{justify-content:center}.hero-title{font-size:2.2rem}.hero-description{font-size:1.1rem}.section-title{font-size:1.8rem}}@media(max-width:768px){.container{padding:0 1rem}.section-card{padding:1.5rem}.hero-section{padding:2.5rem 1.5rem}.hero-title,.app-title{font-size:1.8rem}.games-grid,.grammar-highlights{grid-template-columns:1fr}.hero-stats{gap:1rem}.stat{min-width:120px;padding:1rem 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#2196f34d}.cards-container{display:flex;flex-wrap:wrap;justify-content:center;gap:1.5rem;margin-bottom:2rem;min-height:400px}.card{width:280px;height:350px;perspective:1000px;cursor:pointer;transition:transform .3s ease}.card:hover{transform:translateY(-5px)}.card-inner{position:relative;width:100%;height:100%;text-align:center;transition:transform .8s;transform-style:preserve-3d}.card.flipped .card-inner{transform:rotateY(180deg)}.card-front,.card-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:16px;padding:2rem;display:flex;flex-direction:column;justify-content:center;align-items:center;box-shadow:0 8px 25px #0003}.card-front{background:linear-gradient(135deg,#fff,#f5f7fa);border:3px solid #2196F3;color:#16a34a}.card-back{background:linear-gradient(135deg,#2196f3,#0d47a1);color:#fff;transform:rotateY(180deg);flex-direction:row;justify-content:space-between;align-items:center;overflow-y:auto}.card-back .arabic-text{font-weight:700;color:#16a34a}.card-content{width:100%}.arabic-text{font-size:2.5rem;margin-bottom:1rem;color:#333;font-weight:700;direction:rtl;min-height:80px;display:flex;align-items:center;justify-content:center}.transliteration{font-size:1.2rem;color:#666;margin-bottom:1rem;font-style:italic}.english-text{font-size:1.8rem;margin-bottom:1rem;font-weight:700;min-height:60px;display:flex;align-items:center;justify-content:center}.notes{color:gold;font-size:.9rem;font-weight:400;text-align:left;max-width:40%}.card-notes{margin-top:1.5rem;padding:1rem;background:#ffffff1a;border-radius:8px;border-left:4px solid #FF9800;text-align:left;width:100%}.card-notes p{margin:0;font-size:.95rem;line-height:1.5}.card-footer{margin-top:1.5rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.2);width:100%;display:flex;justify-content:space-between;align-items:center}.card-category{font-size:.85rem;padding:.25rem 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span{font-weight:700;color:#fff;font-size:1.1rem;min-width:100px;text-align:center}.progress-container{width:100%;max-width:400px;margin:1.5rem 0}.progress-bar{height:8px;background:#ffffff1a;border-radius:4px;overflow:hidden;margin-bottom:.5rem}.progress-fill{height:100%;background:linear-gradient(90deg,#4caf50,#2e7d32);border-radius:4px;transition:width .3s ease}.progress-text{text-align:center;color:#ffffffe6;font-size:.95rem}.game-stats{display:flex;gap:1.5rem;margin-bottom:1.5rem;flex-wrap:wrap;justify-content:center}.stat-item{background:#ffffff26;padding:.75rem 1.25rem;border-radius:12px;min-width:120px;text-align:center;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);border:1px solid rgba(255,255,255,.2)}.stat-label{display:block;font-size:.9rem;opacity:.9;margin-bottom:.25rem;color:#fff}.stat-value{display:block;font-size:1.4rem;font-weight:700;color:#fff}.study-mode-prompt{background:#fffffff2;padding:1.5rem;border-radius:12px;text-align:center;margin:1.5rem 0;animation:slideIn .3s ease;color:#333;box-shadow:0 4px 20px #00000026}.study-mode-prompt h3{color:#2196f3;margin-bottom:1rem}.prompt-buttons{display:flex;gap:1rem;justify-content:center;margin-top:1rem}.prompt-btn{padding:.75rem 1.5rem;border-radius:25px;border:none;font-weight:700;cursor:pointer;transition:all .3s ease}.prompt-btn.correct{background:linear-gradient(135deg,#4caf50,#2e7d32);color:#fff}.prompt-btn.incorrect{background:linear-gradient(135deg,#f44336,#d32f2f);color:#fff}.prompt-btn:hover{transform:scale(1.05);box-shadow:0 4px 12px #0000004d}@media(max-width:768px){.card-game{padding:1.5rem}.cards-container{flex-direction:column;align-items:center}.card{width:100%;max-width:300px;height:400px}.card-back{flex-direction:column;justify-content:center;align-items:center}.game-controls{flex-direction:column;align-items:center}.control-btn{width:100%;max-width:250px}.pagination{flex-direction:column;gap:1rem}.pagination button{width:100%}.arabic-text{font-size:2rem;color:#4caf50;font-weight:700}.english-text{font-size:1.5rem}.notes{font-size:.8rem;max-width:100%;text-align:center}}@media(max-width:480px){.card-game{padding:1rem;margin:1rem 0}.card{height:320px;width:90vw;max-width:320px}.card-front,.card-back{padding:1.5rem;font-size:1rem}.transliteration{font-size:.9rem}.notes{font-size:.8rem}.card-game-header h2{font-size:1.5rem}.card-game-header p{font-size:1rem}}@media(prefers-color-scheme:dark){.card-front{background:linear-gradient(135deg,#2d3748,#4a5568);border-color:#4299e1}.arabic-text{color:#f7fafc}.transliteration{color:#cbd5e0}.study-mode-prompt{background:#2d3748f2;color:#f7fafc}.study-mode-prompt h3{color:#63b3ed}}@keyframes cardFlip{0%{transform:rotateY(0)}to{transform:rotateY(360deg)}}.card.flipped{animation:cardFlip .6s ease}:root[data-theme=dark] .card-front{background:linear-gradient(135deg,#2d3748,#4a5568);border-color:#4299e1}:root[data-theme=dark] .arabic-text{color:#f7fafc}:root[data-theme=dark] .transliteration{color:#cbd5e0}:root[data-theme=dark] .study-mode-prompt{background:#2d3748f2;color:#f7fafc}:root[data-theme=dark] .study-mode-prompt h3{color:#63b3ed}.cards-container.loading{opacity:.6;pointer-events:none}.loading-spinner{width:50px;height:50px;border:5px solid rgba(255,255,255,.3);border-top-color:#2196f3;border-radius:50%;animation:spin 1s linear infinite;margin:2rem auto}.about{background:linear-gradient(135deg,#667eea,#764ba2);padding:4rem 1rem;margin:3rem 0;border-radius:20px;position:relative;overflow:hidden;box-shadow:0 10px 40px #0003}.about:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 80%,rgba(255,255,255,.1) 0%,transparent 50%);z-index:0}.about-container{max-width:1200px;margin:0 auto;position:relative;z-index:1}.about-header{text-align:center;margin-bottom:3rem}.about-title{font-size:2.8rem;margin-bottom:1rem;color:#fff;display:flex;align-items:center;justify-content:center;gap:1rem;flex-wrap:wrap}.title-icon{font-size:3rem;animation:bounce 2s infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.about-subtitle{font-size:1.4rem;color:#ffffffe6;max-width:800px;margin:0 auto;line-height:1.6}.about-subtitle strong{color:gold;text-shadow:0 2px 4px rgba(0,0,0,.3)}.about-content{background:#fffffff2;border-radius:16px;padding:3rem;box-shadow:0 8px 32px #0000001a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2)}.about-description{margin-bottom:3rem;text-align:center}.main-description{font-size:1.2rem;line-height:1.8;color:#333;margin-bottom:2rem;max-width:800px;margin-left:auto;margin-right:auto}.main-description strong{color:#667eea;font-weight:700}.mission-statement{background:linear-gradient(135deg,#667eea1a,#764ba21a);padding:2rem;border-radius:12px;border-left:5px solid #667eea;max-width:800px;margin:0 auto}.mission-title{font-size:1.5rem;color:#667eea;margin-bottom:1rem;display:flex;align-items:center;gap:.5rem}.mission-statement p{color:#555;line-height:1.7;font-size:1.1rem}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem;margin:3rem 0}.feature-card{background:#fff;padding:2rem;border-radius:12px;text-align:center;box-shadow:0 4px 20px #00000014;transition:all .3s ease;border:2px solid transparent;opacity:0;transform:translateY(20px);animation:fadeInUp .6s ease forwards}.feature-card:hover{transform:translateY(-10px);box-shadow:0 8px 30px #00000026;border-color:#667eea}.feature-icon{font-size:3rem;margin-bottom:1rem}.feature-title{font-size:1.3rem;color:#333;margin-bottom:.75rem;font-weight:700}.feature-description{color:#666;line-height:1.6;font-size:1rem}.stats-section{background:linear-gradient(135deg,#667eea,#764ba2);padding:2.5rem;border-radius:16px;margin:3rem 0;color:#fff}.stats-title{font-size:1.8rem;margin-bottom:2rem;text-align:center;display:flex;align-items:center;justify-content:center;gap:.5rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem}.stat-card{text-align:center;padding:1.5rem;background:#ffffff1a;border-radius:12px;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);border:1px solid rgba(255,255,255,.2);transition:all .3s ease}.stat-card:hover{background:#fff3;transform:scale(1.05)}.stat-number{font-size:2.5rem;font-weight:700;margin-bottom:.5rem;color:gold}.stat-label{font-size:1rem;opacity:.9}.learning-path{margin:3rem 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