:root{--color-primary: #4a7c59;--color-primary-dark: #3a6249;--color-primary-light: #6b9b7a;--color-secondary: #8fbc8f;--color-accent: #deb887;--color-background: #f5f5dc;--color-background-dark: #e8e8d0;--color-text: #2f4f2f;--color-text-light: #5a7a5a;--color-white: #fefefe;--color-shadow: rgba(47, 79, 47, .15);--color-memory: #7b68ee;--color-focus: #20b2aa;--color-logic: #daa520;--color-speed: #ff6b6b;--color-language: #4682b4;--color-calm: #9370db;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--radius-full: 50%;--transition-fast: .15s ease;--transition-normal: .3s ease;--transition-slow: .5s ease;--font-primary: "Segoe UI", system-ui, -apple-system, sans-serif}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;overflow:hidden}body{font-family:var(--font-primary);background:linear-gradient(135deg,var(--color-background) 0%,var(--color-background-dark) 100%);color:var(--color-text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{height:100%;display:flex;flex-direction:column}.app{display:flex;flex-direction:column;height:100%;max-width:430px;margin:0 auto;background:var(--color-white);box-shadow:0 0 40px var(--color-shadow)}.header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md);background:var(--color-primary);color:var(--color-white)}.header-title{font-size:1.25rem;font-weight:600;display:flex;align-items:center;gap:var(--spacing-sm)}.header-stats{display:flex;gap:var(--spacing-md);font-size:.875rem}.stat-item{display:flex;align-items:center;gap:var(--spacing-xs)}.main-content{flex:1;overflow-y:auto;padding:var(--spacing-md)}.nav{display:flex;justify-content:space-around;padding:var(--spacing-sm) var(--spacing-md);background:var(--color-white);border-top:1px solid var(--color-background-dark);box-shadow:0 -2px 10px var(--color-shadow)}.nav-item{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm);border:none;background:transparent;color:var(--color-text-light);font-size:.75rem;cursor:pointer;transition:color var(--transition-fast);min-width:60px}.nav-item:hover,.nav-item.active{color:var(--color-primary)}.nav-icon{font-size:1.5rem}.card{background:var(--color-white);border-radius:var(--radius-md);padding:var(--spacing-lg);box-shadow:0 2px 8px var(--color-shadow);margin-bottom:var(--spacing-md)}.card-title{font-size:1.125rem;font-weight:600;margin-bottom:var(--spacing-sm);color:var(--color-text)}.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md)}.category-card{background:var(--color-white);border-radius:var(--radius-md);padding:var(--spacing-lg);text-align:center;cursor:pointer;transition:transform var(--transition-fast),box-shadow var(--transition-fast);border:2px solid transparent;box-shadow:0 2px 8px var(--color-shadow)}.category-card:hover{transform:translateY(-2px);box-shadow:0 4px 16px var(--color-shadow)}.category-card.locked{opacity:.5;cursor:not-allowed}.category-card.memory{border-color:var(--color-memory)}.category-card.focus{border-color:var(--color-focus)}.category-card.logic{border-color:var(--color-logic)}.category-card.speed{border-color:var(--color-speed)}.category-card.language{border-color:var(--color-language)}.category-card.calm{border-color:var(--color-calm)}.category-icon{font-size:2.5rem;margin-bottom:var(--spacing-sm)}.category-name{font-weight:600;margin-bottom:var(--spacing-xs)}.category-level{font-size:.875rem;color:var(--color-text-light)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-lg);border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);min-height:48px;min-width:48px}.btn-primary{background:var(--color-primary);color:var(--color-white)}.btn-primary:hover{background:var(--color-primary-dark)}.btn-secondary{background:var(--color-background);color:var(--color-text)}.btn-secondary:hover{background:var(--color-background-dark)}.btn-large{width:100%;padding:var(--spacing-lg);font-size:1.125rem}.progress-bar{width:100%;height:8px;background:var(--color-background-dark);border-radius:var(--radius-lg);overflow:hidden}.progress-fill{height:100%;background:var(--color-primary);transition:width var(--transition-normal)}.exercise-screen{display:flex;flex-direction:column;height:100%;padding:var(--spacing-md)}.exercise-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-lg)}.exercise-timer{font-size:1.5rem;font-weight:600;color:var(--color-primary)}.exercise-content{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center}.exercise-instruction{text-align:center;font-size:1.125rem;margin-bottom:var(--spacing-xl);color:var(--color-text-light)}.exercise-grid{display:grid;gap:var(--spacing-md);width:100%;max-width:320px}.exercise-grid-3x3{grid-template-columns:repeat(3,1fr)}.exercise-grid-4x4{grid-template-columns:repeat(4,1fr)}.exercise-item{aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:var(--color-background);border-radius:var(--radius-md);font-size:1.5rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);border:2px solid transparent;min-height:48px;min-width:48px}.exercise-item:hover{background:var(--color-background-dark)}.exercise-item.selected{border-color:var(--color-primary);background:var(--color-primary-light);color:var(--color-white)}.exercise-item.correct{background:var(--color-secondary);border-color:var(--color-primary)}.exercise-item.incorrect{background:#ffcccb;border-color:#ff6b6b}.exercise-item.highlighted{background:var(--color-primary);color:var(--color-white)}.results-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:var(--spacing-xl);height:100%}.results-score{font-size:4rem;font-weight:700;color:var(--color-primary);margin-bottom:var(--spacing-md)}.results-message{font-size:1.25rem;color:var(--color-text-light);margin-bottom:var(--spacing-xl)}.results-stats{width:100%;max-width:280px;margin-bottom:var(--spacing-xl)}.results-stat{display:flex;justify-content:space-between;padding:var(--spacing-sm) 0;border-bottom:1px solid var(--color-background-dark)}.garden-container{width:100%;height:300px;background:linear-gradient(180deg,#87ceeb,#98d8c8,#6b8e23);border-radius:var(--radius-md);overflow:hidden;position:relative}.garden-zone{position:absolute;bottom:0;width:100%;height:60%;background:linear-gradient(180deg,transparent 0%,#8fbc8f 20%,#6b8e23 100%)}.welcome-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:var(--spacing-xl);text-align:center}.welcome-logo{font-size:5rem;margin-bottom:var(--spacing-lg)}.welcome-title{font-size:2rem;font-weight:700;color:var(--color-primary);margin-bottom:var(--spacing-sm)}.welcome-subtitle{font-size:1rem;color:var(--color-text-light);margin-bottom:var(--spacing-xl)}.welcome-input{width:100%;max-width:280px;padding:var(--spacing-md);border:2px solid var(--color-background-dark);border-radius:var(--radius-md);font-size:1rem;text-align:center;margin-bottom:var(--spacing-lg);transition:border-color var(--transition-fast)}.welcome-input:focus{outline:none;border-color:var(--color-primary)}.breathing-circle{width:200px;height:200px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--color-primary-light),var(--color-secondary));display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-weight:600;color:var(--color-white);transition:transform 4s ease-in-out}.breathing-circle.inhale{transform:scale(1.3)}.breathing-circle.exhale{transform:scale(1)}.streak-badge{display:inline-flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);background:linear-gradient(135deg,#ff9a56,#ff6b6b);color:var(--color-white);border-radius:var(--radius-lg);font-size:.875rem;font-weight:600}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-pulse{animation:pulse 2s ease-in-out infinite}.animate-fadeIn{animation:fadeIn .3s ease-out}.animate-slideUp{animation:slideUp .4s ease-out}.profile-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.profile-stat{text-align:center;padding:var(--spacing-md);background:var(--color-background);border-radius:var(--radius-md)}.profile-stat-value{font-size:1.5rem;font-weight:700;color:var(--color-primary)}.profile-stat-label{font-size:.75rem;color:var(--color-text-light);margin-top:var(--spacing-xs)}.back-button{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:transparent;border:none;color:var(--color-white);font-size:1rem;cursor:pointer}.word-display{font-size:2rem;font-weight:700;color:var(--color-primary);margin-bottom:var(--spacing-lg);letter-spacing:.1em}.answer-input{width:100%;max-width:280px;padding:var(--spacing-md);border:2px solid var(--color-background-dark);border-radius:var(--radius-md);font-size:1.25rem;text-align:center;margin-bottom:var(--spacing-md)}.answer-input:focus{outline:none;border-color:var(--color-primary)}