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transparent}.account-item:hover{background:#667eea0d;border-color:#667eea1a}.account-item.active{background:#667eea1a;border-color:#667eea;color:#667eea}.account-details{flex:1}.account-name{font-weight:600;color:#333;margin-bottom:4px}.account-item.active .account-name{color:#667eea}.account-item .account-address{font-family:Monaco,Menlo,monospace;font-size:12px;color:#666}.no-accounts{display:flex;flex-direction:column;align-items:center;gap:16px;padding:40px 20px;text-align:center}.no-accounts-icon{font-size:48px;opacity:.5}.no-accounts-text{color:#666}.no-accounts-text p{margin:0 0 8px;font-weight:500}.no-accounts-text small{font-size:12px;opacity:.8}.accounts-footer{border-top:1px solid rgba(0,0,0,.08);padding:16px 24px}.footer-actions{display:flex;gap:12px}.refresh-accounts-btn,.add-account-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 16px;border:none;border-radius:12px;cursor:pointer;transition:all .2s 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20px}.accounts-list{padding:12px}.accounts-footer{padding:12px 16px}}:root{--primary-purple: #667eea;--primary-purple-dark: #5a6fd8;--primary-purple-darker: #4c5bc7;--secondary-purple: #764ba2;--secondary-purple-dark: #6a4190;--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-card: linear-gradient(135deg, rgba(255, 255, 255, .1) 0%, rgba(255, 255, 255, .05) 100%);--gradient-background: linear-gradient(180deg, #FAFBFC 0%, #F5F7FA 100%);--gray-50: #FAFBFC;--gray-100: #F5F7FA;--gray-200: #E4E7EB;--gray-300: #CFD4DB;--gray-400: #9AA5B1;--gray-500: #7B8794;--gray-600: #616E7C;--gray-700: #52606D;--gray-800: #3E4C59;--gray-900: #323F4B;--success: #10B981;--warning: #F59E0B;--error: #EF4444;--info: var(--primary-purple);--bg-primary: #FFFFFF;--bg-secondary: var(--gray-50);--bg-tertiary: var(--gray-100);--text-primary: var(--gray-900);--text-secondary: var(--gray-700);--text-tertiary: var(--gray-500);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--space-xs: .5rem;--space-sm: 1rem;--space-md: 1.5rem;--space-lg: 2rem;--space-xl: 3rem;--space-2xl: 4rem}.exchange-tabs,.staking-tabs{display:flex;gap:8px;margin:20px 0;border-bottom:2px solid var(--gray-200);padding-bottom:8px}.tab-button{background:var(--bg-tertiary);border:none;border-radius:var(--radius-sm);padding:12px 20px;font-size:14px;font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all .2s ease;position:relative}.tab-button:hover{background:var(--gray-200);color:var(--text-primary)}.tab-button.active{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-md)}.tab-button.active:after{content:"";position:absolute;bottom:-10px;left:50%;transform:translate(-50%);width:8px;height:8px;background:var(--primary-purple);border-radius:50%}[data-theme=dark]{--bg-primary: var(--gray-900);--bg-secondary: var(--gray-800);--bg-tertiary: var(--gray-700);--text-primary: #FFFFFF;--text-secondary: var(--gray-200);--text-tertiary: var(--gray-400);--gradient-background: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-800) 100%)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Inter,Segoe UI,Roboto,sans-serif;line-height:1.6;color:var(--text-primary);background:var(--gradient-background);font-feature-settings:"rlig" 1,"calt" 1;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}.app{min-height:100vh;background:var(--gradient-background);width:100%;overflow-x:hidden;display:flex;flex-direction:column}[data-theme=dark] .header{border-bottom:1px solid rgba(97,110,124,.3)}.header-content{display:flex;justify-content:space-between;align-items:center;max-width:1200px;width:100%;margin:0 auto;padding:0 24px;box-sizing:border-box}.title{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-size:2.5rem;font-weight:700;letter-spacing:-.025em}.header-actions,.wallet-connected{display:flex;align-items:center;gap:var(--space-md)}.network-switcher{display:flex;align-items:center;gap:var(--space-xs)}.network-select{padding:var(--space-xs) var(--space-sm);border:1px solid var(--gray-300);border-radius:var(--radius-md);background:var(--bg-primary);color:var(--text-primary);font-weight:500;transition:all .2s ease}.network-select:focus{outline:none;border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a}.wallet-info{display:flex;align-items:center;gap:var(--space-md);background:var(--bg-secondary);padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-lg);border:1px solid var(--gray-200)}.disconnect-btn{padding:var(--space-xs) var(--space-sm);background:var(--error);color:#fff;border:none;border-radius:var(--radius-md);cursor:pointer;font-size:.875rem;font-weight:600;transition:all .2s ease}.disconnect-btn:hover{background:#dc2626;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.connect-btn{padding:var(--space-sm) var(--space-lg);background:var(--gradient-primary);color:#fff;border:none;border-radius:var(--radius-full);cursor:pointer;font-size:1rem;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-md);position:relative;overflow:hidden}.connect-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transition:left .5s}.connect-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.connect-btn:hover:not(:disabled):before{left:100%}.connect-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.main-content{max-width:1200px;width:100%;margin:0 auto;padding:0 24px var(--space-2xl) 24px;display:grid;gap:var(--space-xl);box-sizing:border-box}.token-section{background:var(--bg-primary);padding:var(--space-xl);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.2);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}[data-theme=dark] .token-section{border:1px solid rgba(255,255,255,.1)}.token-exchange h3{color:var(--text-primary);margin-bottom:var(--space-md);font-size:1.5rem;font-weight:700}.current-balance{background:var(--bg-tertiary);padding:var(--space-md);border-radius:var(--radius-lg);margin-bottom:var(--space-md);border:1px solid var(--gray-200)}[data-theme=dark] .current-balance{border:1px solid var(--gray-600)}.exchange-form{display:grid;gap:var(--space-md)}.input-group{display:grid;gap:var(--space-xs)}.input-group label{font-weight:600;color:var(--text-secondary);font-size:.875rem;text-transform:uppercase;letter-spacing:.05em}.eth-input,.name-input,.token-input{padding:var(--space-sm) var(--space-md);border:1px solid var(--gray-300);border-radius:var(--radius-lg);font-size:1rem;background:var(--bg-primary);color:var(--text-primary);transition:all .2s ease;width:100%;box-sizing:border-box}.eth-input:focus,.name-input:focus,.token-input:focus{outline:none;border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a;transform:translateY(-2px)}[data-theme=dark] .eth-input,[data-theme=dark] .name-input,[data-theme=dark] .token-input{border-color:var(--gray-600);background:var(--bg-secondary)}.exchange-rate{background:#667eea1a;padding:var(--space-md);border-radius:var(--radius-lg);border:1px solid rgba(102,126,234,.2);color:var(--primary-purple-dark);font-weight:600}.buy-tokens-btn,.sell-tokens-btn,.verify-btn,.purchase-btn,.submit-btn{padding:var(--space-sm) var(--space-lg);background:var(--gradient-primary);color:#fff;border:none;border-radius:var(--radius-lg);cursor:pointer;font-size:1rem;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-md);position:relative;overflow:hidden;width:100%;min-height:44px;display:flex;align-items:center;justify-content:center}.buy-tokens-btn:hover:not(:disabled),.sell-tokens-btn:hover:not(:disabled),.verify-btn:hover:not(:disabled),.purchase-btn:hover:not(:disabled),.submit-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.approve-btn{background:linear-gradient(135deg,var(--warning) 0%,#FBBF24 100%);color:#fff;padding:var(--space-sm) var(--space-lg);border:none;border-radius:var(--radius-lg);cursor:pointer;font-size:1rem;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-md)}.approve-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.buy-tokens-btn:disabled,.sell-tokens-btn:disabled,.verify-btn:disabled,.approve-btn:disabled,.purchase-btn:disabled,.submit-btn:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}.courses-section{background:var(--bg-primary);padding:var(--space-xl);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.2)}[data-theme=dark] .courses-section{border:1px solid rgba(255,255,255,.1)}.courses-section h2{color:var(--text-primary);font-size:1.75rem;font-weight:700;margin-bottom:var(--space-lg)}.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--space-lg);margin-top:var(--space-lg);max-width:100%}@media (min-width: 1024px){.courses-grid{grid-template-columns:repeat(3,1fr)}}.course-card{background:var(--bg-primary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-xl);transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-md);position:relative;overflow:hidden}[data-theme=dark] .course-card{border:1px solid var(--gray-600)}.course-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary);opacity:0;transition:opacity .3s ease}.course-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl)}.course-card:hover:before{opacity:1}.course-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-md)}.course-header h3{color:var(--text-primary);margin:0;font-size:1.25rem;font-weight:700;line-height:1.3}.course-price{background:var(--gradient-primary);color:#fff;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-full);font-size:.875rem;font-weight:600;white-space:nowrap;box-shadow:var(--shadow-sm)}.course-description{color:var(--text-secondary);margin-bottom:var(--space-md);line-height:1.6}.course-creator,.course-status{font-size:.875rem;color:var(--text-tertiary);margin-bottom:var(--space-xs)}.course-actions{margin-top:var(--space-md)}.course-card .approve-btn,.course-card .purchase-btn{width:100%;justify-content:center;display:flex;align-items:center;min-height:44px}.approval-step,.sell-flow{width:100%}.sell-flow .approval-step{display:flex;flex-direction:column;gap:var(--space-xs);width:100%}.sell-flow .approve-btn,.sell-flow .sell-tokens-btn{width:100%;justify-content:center;display:flex;align-items:center;min-height:44px}.sell-flow .approval-note{color:var(--text-tertiary);font-size:.8rem;text-align:center;margin-top:var(--space-xs)}.purchased span{color:#28a745;font-weight:500}.creator-badge span{color:#007bff;font-weight:500;background:#e7f3ff;padding:.5rem 1rem;border-radius:20px;display:inline-block}.unavailable span{color:#6c757d}.approval-step{display:flex;flex-direction:column;gap:.5rem}.approval-note{color:#6c757d;font-size:.8rem;text-align:center}.form{display:grid;gap:1rem}.form-group{display:grid;gap:.5rem}.form-group label{font-weight:500;color:#555}.form-group input,.form-group textarea{padding:.75rem;border:1px solid #ddd;border-radius:8px;font-size:1rem}.form-group input.error,.form-group textarea.error{border-color:#dc3545}.error-text{color:#dc3545;font-size:.875rem}.form-group textarea{resize:vertical;min-height:100px}.courses-table{display:grid;gap:.5rem;margin-top:1rem}.table-header{display:grid;grid-template-columns:1fr 2fr 1fr 1fr 1fr;gap:1rem;padding:1rem;background:#f8f9fa;border-radius:8px;font-weight:600;color:#555}.table-row{display:grid;grid-template-columns:1fr 2fr 1fr 1fr 1fr;gap:1rem;padding:1rem;background:#fff;border:1px solid #e9ecef;border-radius:8px;align-items:center}.table-row:hover{background:#f8f9fa}.course-status.active{color:#28a745}.course-status.inactive{color:#dc3545}.profile-section,.purchased-courses-section,.creator-courses-section,.course-creation-section{background:var(--bg-primary);padding:var(--space-xl);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);border:1px solid var(--gray-200);width:100%;box-sizing:border-box;position:relative;overflow:hidden}[data-theme=dark] .profile-section,[data-theme=dark] .purchased-courses-section,[data-theme=dark] .creator-courses-section,[data-theme=dark] .course-creation-section{border-color:var(--gray-700)}.profile-section:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary)}.user-profile{position:relative}.user-profile h3{font-size:1.75rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-lg);display:flex;align-items:center;gap:var(--space-sm)}.user-profile h3:before{content:"👤";font-size:1.5rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--gradient-primary);border-radius:50%;color:#fff}.profile-info{display:grid;gap:var(--space-lg);margin-top:var(--space-lg)}.info-item{background:var(--bg-secondary);padding:var(--space-lg);border-radius:var(--radius-lg);border:1px solid var(--gray-200);transition:all .3s ease;position:relative;overflow:hidden}[data-theme=dark] .info-item{border-color:var(--gray-700)}.info-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.info-item label{font-weight:600;color:var(--text-secondary);font-size:.875rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--space-xs);display:block}.address{font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,Consolas,Courier New,monospace;background:var(--bg-primary);padding:var(--space-md);border-radius:var(--radius-md);word-break:break-all;font-size:.875rem;border:1px solid var(--gray-300);color:var(--text-primary);position:relative;overflow:hidden}[data-theme=dark] .address{border-color:var(--gray-600)}.address:before{content:"🔗";position:absolute;right:var(--space-sm);top:50%;transform:translateY(-50%);opacity:.5}.address-container{display:flex;align-items:center;gap:var(--space-sm);width:100%}.address-container .address{flex:1;margin:0;cursor:pointer;transition:all .2s ease}.address-container .address:hover{border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a}.address-actions{display:flex;gap:var(--space-xs);align-items:center;flex-shrink:0}.address-action-btn{width:36px;height:36px;border:none;background:var(--bg-tertiary);border-radius:var(--radius-md);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:14px;transition:all .2s ease;border:1px solid var(--gray-200)}.address-action-btn:hover{background:var(--primary-purple);color:#fff;border-color:var(--primary-purple);transform:translateY(-1px);box-shadow:0 2px 8px #667eea4d}[data-theme=dark] .address-action-btn{border-color:var(--gray-600);background:var(--gray-700)}[data-theme=dark] .address-action-btn:hover{background:var(--primary-purple);border-color:var(--primary-purple)}.edit-name{display:flex;gap:var(--space-sm);align-items:center;flex-wrap:wrap}.display-name{display:flex;gap:var(--space-md);align-items:center;justify-content:space-between}.display-name span{font-size:1.125rem;font-weight:500;color:var(--text-primary);padding:var(--space-sm) var(--space-md);background:var(--bg-primary);border-radius:var(--radius-md);border:1px solid var(--gray-300);min-width:200px}[data-theme=dark] .display-name span{border-color:var(--gray-600)}.edit-btn,.save-btn,.cancel-btn{padding:var(--space-sm) var(--space-lg);border:none;border-radius:var(--radius-md);cursor:pointer;font-size:.875rem;font-weight:600;transition:all .3s ease;position:relative;overflow:hidden}.edit-btn{background:var(--bg-primary);color:var(--primary-purple);border:2px solid var(--primary-purple)}.edit-btn:hover{background:var(--primary-purple);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.save-btn{background:linear-gradient(135deg,var(--success) 0%,#34D399 100%);color:#fff;box-shadow:var(--shadow-sm)}.save-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:var(--shadow-md)}.cancel-btn{background:var(--gray-500);color:#fff;box-shadow:var(--shadow-sm)}.cancel-btn:hover{background:var(--gray-600);transform:translateY(-1px);box-shadow:var(--shadow-md)}.save-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.info-item:before{content:"";position:absolute;inset:-1px;background:var(--gradient-primary);border-radius:var(--radius-lg);opacity:0;transition:opacity .3s ease;z-index:-1}.info-item:hover:before{opacity:.1}.purchased-courses h3{font-size:1.75rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-lg);display:flex;align-items:center;gap:var(--space-sm)}.purchased-courses h3:before{content:"📚";font-size:1.5rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--gradient-primary);border-radius:50%;color:#fff}.courses-list{display:grid;gap:var(--space-lg)}.course-item{background:var(--bg-secondary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-xl);transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}[data-theme=dark] .course-item{border-color:var(--gray-700)}.course-item:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(135deg,var(--success) 0%,#34D399 100%);opacity:0;transition:opacity .3s ease}.course-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-xl)}.course-item:hover:before{opacity:1}.course-item .course-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-md);gap:var(--space-md)}.course-item .course-header h4{font-size:1.25rem;font-weight:700;color:var(--text-primary);margin:0;line-height:1.3;flex:1}.course-item .course-price{background:linear-gradient(135deg,var(--success) 0%,#34D399 100%);color:#fff;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-full);font-size:.875rem;font-weight:600;white-space:nowrap;box-shadow:var(--shadow-sm)}.course-item .course-body{margin-bottom:var(--space-lg)}.course-item .course-description{color:var(--text-secondary);line-height:1.6;margin-bottom:var(--space-md)}.course-meta{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md);font-size:.875rem;color:var(--text-tertiary)}.course-meta span{padding:var(--space-xs) var(--space-sm);background:var(--bg-primary);border-radius:var(--radius-md);border:1px solid var(--gray-300);display:flex;align-items:center;gap:var(--space-xs)}[data-theme=dark] .course-meta span{border-color:var(--gray-600)}.course-meta .creator:before{content:"👨‍💻"}.course-meta .date:before{content:"📅"}.access-btn{background:linear-gradient(135deg,var(--success) 0%,#34D399 100%);color:#fff;padding:var(--space-sm) var(--space-lg);border:none;border-radius:var(--radius-lg);cursor:default;font-size:1rem;font-weight:600;box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:center;gap:var(--space-xs);width:100%}.course-item.loading{background:var(--bg-tertiary);color:var(--text-tertiary);text-align:center;padding:var(--space-xl);animation:pulse 2s ease-in-out infinite}.exchange-records{background:var(--bg-primary);padding:var(--space-xl);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);border:1px solid var(--gray-200);position:relative;overflow:hidden}[data-theme=dark] .exchange-records{border-color:var(--gray-700)}.exchange-records:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary)}.records-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-lg)}.exchange-records h3{font-size:1.75rem;font-weight:700;color:var(--text-primary);display:flex;align-items:center;gap:var(--space-sm);margin:0}.exchange-records h3:before{content:"📊";font-size:1.5rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--gradient-primary);border-radius:50%;color:#fff}.refresh-btn,.retry-btn{background:var(--bg-secondary);color:var(--text-primary);border:2px solid var(--primary-purple);border-radius:var(--radius-md);padding:var(--space-xs) var(--space-md);cursor:pointer;font-size:.875rem;font-weight:600;transition:all .3s ease}.refresh-btn:hover,.retry-btn:hover{background:var(--primary-purple);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.records-list{display:grid;gap:var(--space-md)}.record-item{background:var(--bg-secondary);border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:var(--space-lg);transition:all .3s ease;position:relative;overflow:hidden}[data-theme=dark] .record-item{border-color:var(--gray-700)}.record-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.record-item.buy:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(135deg,var(--success) 0%,#34D399 100%)}.record-item.sell:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(135deg,#ef4444,#f87171)}.record-main{margin-bottom:var(--space-md)}.record-type{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-sm)}.type-badge{padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-full);font-size:.875rem;font-weight:600}.type-badge.buy{background:#22c55e1a;color:var(--success);border:1px solid rgba(34,197,94,.2)}.type-badge.sell{background:#ef44441a;color:#ef4444;border:1px solid rgba(239,68,68,.2)}.record-time{font-size:.875rem;color:var(--text-tertiary)}.record-amounts{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md)}.amount-item{display:flex;flex-direction:column;gap:var(--space-xs)}.amount-item label{font-size:.875rem;color:var(--text-secondary);font-weight:500}.eth-amount,.token-amount{font-size:1.125rem;font-weight:700;font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,Consolas,Courier New,monospace}.eth-amount{color:var(--primary-purple)}.token-amount{color:var(--success)}.record-details{padding-top:var(--space-md);border-top:1px solid var(--gray-200);display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md)}[data-theme=dark] .record-details{border-color:var(--gray-700)}.detail-item{display:flex;flex-direction:column;gap:var(--space-xs)}.detail-item label{font-size:.8rem;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.05em}.detail-item span{font-size:.875rem;color:var(--text-secondary);font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,Consolas,Courier New,monospace}.tx-link{color:var(--primary-purple);text-decoration:none;font-size:.875rem;font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,Consolas,Courier New,monospace;transition:all .3s ease}.tx-link:hover{color:var(--primary-purple-dark);text-decoration:underline}.empty-state,.loading-state,.error-state{text-align:center;padding:var(--space-xl);color:var(--text-secondary);background:var(--bg-secondary);border-radius:var(--radius-lg);border:1px dashed var(--gray-300)}[data-theme=dark] .empty-state,[data-theme=dark] .loading-state,[data-theme=dark] .error-state{border-color:var(--gray-600)}.empty-state:before{content:"📭";font-size:2rem;display:block;margin-bottom:var(--space-sm)}.loading-state:before{content:"⏳";font-size:2rem;display:block;margin-bottom:var(--space-sm)}.error-state:before{content:"❌";font-size:2rem;display:block;margin-bottom:var(--space-sm)}.page-exchange-records{margin-top:var(--space-xl)}.page-exchange-records .exchange-records{box-shadow:var(--shadow-xl);border:1px solid var(--gray-200)}[data-theme=dark] .page-exchange-records .exchange-records{border-color:var(--gray-700)}.user-profile p,.purchased-courses p{color:var(--text-secondary);font-size:1.125rem;text-align:center;padding:var(--space-xl);background:var(--bg-secondary);border-radius:var(--radius-lg);border:1px dashed var(--gray-300);margin-top:var(--space-md);position:relative;overflow:hidden}[data-theme=dark] .user-profile p,[data-theme=dark] .purchased-courses p{border-color:var(--gray-600)}.user-profile p:before,.purchased-courses p:before{content:"💼";font-size:2rem;display:block;margin-bottom:var(--space-sm)}.purchased-courses p:before{content:"📖"}@media (max-width: 1200px){.hero-content,.stats-container,.categories-container,.featured-courses-container,.cta-container,.page-container{padding-left:20px;padding-right:20px}}@media (max-width: 1024px){.courses-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--space-md)}.main-content{padding:0 20px var(--space-xl) 20px}.nav-list,.header-content{padding:0 20px}.token-section,.courses-section{padding:var(--space-lg)}.hero-content,.stats-container,.categories-container,.featured-courses-container{max-width:none;padding:0 20px}}@media (max-width: 768px){.header-content{flex-direction:column;gap:var(--space-md);text-align:center}.title{font-size:2rem}.wallet-connected{flex-direction:column;align-items:center;gap:var(--space-sm)}.courses-grid{grid-template-columns:1fr;gap:var(--space-md)}.course-card{padding:var(--space-lg)}.course-header{flex-direction:column;align-items:flex-start;gap:var(--space-xs)}.course-price{align-self:flex-start}.token-section,.courses-section{padding:var(--space-md)}.main-content{gap:var(--space-lg);padding:0 16px var(--space-lg) 16px}.header-content{padding:0 16px}.table-header,.table-row{grid-template-columns:1fr;gap:var(--space-xs);text-align:left}.info-item{grid-template-columns:1fr;gap:var(--space-xs)}.edit-name{flex-direction:column;align-items:stretch}.display-name{flex-direction:column;align-items:flex-start;gap:var(--space-sm)}.display-name span{min-width:unset;width:100%}.course-meta{grid-template-columns:1fr}.course-meta{flex-direction:column;gap:var(--space-xs)}.hero-content,.stats-container,.categories-container,.featured-courses-container,.cta-container,.page-container{padding-left:16px;padding-right:16px}.nav-brand{margin-left:16px}}@media (max-width: 480px){.title{font-size:1.75rem}.token-section,.courses-section,.course-card{padding:var(--space-sm);border-radius:var(--radius-lg)}.connect-btn,.buy-tokens-btn,.verify-btn,.purchase-btn,.submit-btn,.approve-btn{padding:var(--space-xs) var(--space-md);font-size:.875rem}.hero-content,.stats-container,.categories-container,.featured-courses-container,.cta-container,.page-container{padding-left:12px;padding-right:12px}.hero-section,.stats-section,.course-categories,.featured-courses,.cta-section{padding-top:var(--space-lg);padding-bottom:var(--space-lg)}}.error{color:#dc3545;background:#f8d7da;border:1px solid #f5c6cb;padding:.75rem;border-radius:8px;margin-top:1rem}.success{color:#155724;background:#d4edda;border:1px solid #c3e6cb;padding:.75rem;border-radius:8px;margin-top:1rem}.course-id-success{margin-top:.5rem;font-size:.9rem}.course-id{font-family:monospace;background:#c3e6cb;padding:.25rem .5rem;border-radius:4px;font-weight:600}.loading{text-align:center;padding:2rem;color:#666}.course-id-display{display:flex;gap:.5rem;align-items:center}.course-id-input{flex:1;background:#f8f9fa;border:1px solid #e9ecef;color:#6c757d;font-family:monospace;font-size:.9rem}.course-id-input:focus{outline:none;border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a}.regenerate-btn{padding:.75rem 1rem;background:#6c757d;color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:.9rem;white-space:nowrap;transition:background .3s ease}.regenerate-btn:hover:not(:disabled){background:#5a6268}.regenerate-btn:disabled{opacity:.6;cursor:not-allowed}.course-id-note{color:#6c757d;font-size:.8rem;margin-top:.25rem;display:block}.home-page,.courses-page,.tokens-page,.user-center-page,.creator-platform-page,.course-purchase-page{flex:1;width:100%;overflow-x:hidden;background:var(--gradient-background);display:flex;flex-direction:column}.hero-section{background:var(--gradient-background);padding:var(--space-2xl) 0;position:relative;overflow:hidden;width:100%;flex-shrink:0}.hero-content{max-width:1200px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1fr 1fr;gap:var(--space-2xl);align-items:center;width:100%;box-sizing:border-box}.hero-text{z-index:2}.hero-title{margin:0 0 var(--space-lg) 0}.hero-title-main{display:block;font-size:3.5rem;font-weight:800;line-height:1.1;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-title-sub{display:block;font-size:1.5rem;font-weight:400;color:var(--text-secondary);margin-top:var(--space-xs)}.hero-description{font-size:1.125rem;line-height:1.7;color:var(--text-secondary);margin-bottom:var(--space-xl)}.hero-actions{display:flex;gap:var(--space-md)}.cta-primary,.cta-secondary{padding:var(--space-md) var(--space-xl);border-radius:var(--radius-full);font-weight:600;text-decoration:none;transition:all .3s cubic-bezier(.4,0,.2,1);display:inline-flex;align-items:center;gap:var(--space-xs)}.cta-primary{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-lg)}.cta-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-xl);color:#fff}.cta-secondary{background:var(--bg-primary);color:var(--text-primary);border:2px solid var(--gray-300)}.cta-secondary:hover{border-color:var(--primary-purple);transform:translateY(-2px);box-shadow:var(--shadow-md);color:var(--text-primary)}.hero-visual{position:relative;height:500px;display:flex;align-items:center;justify-content:center;overflow:hidden}.hero-graphic{position:relative;width:100%;height:100%}.floating-card{position:absolute;background:var(--bg-primary);border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:var(--space-md);display:flex;align-items:center;gap:var(--space-sm);box-shadow:var(--shadow-lg);animation:float 6s ease-in-out infinite}[data-theme=dark] .floating-card{border-color:var(--gray-600)}.floating-card.card-1{top:20%;left:10%;animation-delay:0s}.floating-card.card-2{top:60%;right:5%;animation-delay:2s}.floating-card.card-3{bottom:30%;left:20%;animation-delay:4s}.card-icon{font-size:1.5rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--bg-tertiary);border-radius:var(--radius-md)}.card-title{font-weight:600;font-size:.875rem;color:var(--text-primary)}.card-subtitle{font-size:.75rem;color:var(--text-tertiary)}.hero-center-icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:5}.center-logo{width:80px;height:80px;background:var(--gradient-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-xl);animation:pulse 3s ease-in-out infinite}.logo-text{color:#fff;font-weight:700;font-size:1rem}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-20px)}}@keyframes pulse{0%,to{transform:translate(-50%,-50%) scale(1)}50%{transform:translate(-50%,-50%) scale(1.1)}}.stats-section{background:var(--bg-primary);padding:var(--space-2xl) 0;border-top:1px solid var(--gray-200);border-bottom:1px solid var(--gray-200);width:100%;overflow:hidden;flex-shrink:0}[data-theme=dark] .stats-section{border-color:var(--gray-700)}.stats-container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;box-sizing:border-box}.stats-header{text-align:center;margin-bottom:var(--space-2xl)}.stats-header h2{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-md)}.stats-header p{font-size:1.125rem;color:var(--text-secondary)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--space-xl)}.stat-card{text-align:center;padding:var(--space-xl);background:var(--bg-secondary);border-radius:var(--radius-xl);border:1px solid var(--gray-200);transition:all .3s ease}[data-theme=dark] .stat-card{border-color:var(--gray-700)}.stat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.stat-icon{font-size:3rem;margin-bottom:var(--space-md);display:block}.stat-value{font-size:2.5rem;font-weight:800;color:var(--primary-purple);margin-bottom:var(--space-xs)}.stat-label{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin-bottom:var(--space-xs)}.stat-description{font-size:.875rem;color:var(--text-tertiary);line-height:1.5}.course-categories{padding:var(--space-2xl) 0;background:var(--gradient-background);width:100%;overflow:hidden;flex-shrink:0}.categories-container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;box-sizing:border-box}.categories-header{text-align:center;margin-bottom:var(--space-2xl)}.categories-header h2{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-md)}.categories-header p{font-size:1.125rem;color:var(--text-secondary)}.categories-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:var(--space-lg)}.category-card{background:var(--bg-primary);border:2px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-xl);cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;gap:var(--space-md);position:relative;overflow:hidden}[data-theme=dark] .category-card{border-color:var(--gray-700)}.category-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--category-color, var(--primary-blue));transform:scaleX(0);transition:transform .3s ease}.category-card:hover:before,.category-card.active:before{transform:scaleX(1)}.category-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-xl);border-color:var(--category-color, var(--primary-purple))}.category-card.active{border-color:var(--category-color, var(--primary-purple));box-shadow:var(--shadow-md)}.category-icon{font-size:2rem;width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:rgba(var(--category-color, 99, 102, 241),.1);border-radius:var(--radius-lg);flex-shrink:0}.category-content{flex:1}.category-name{font-size:1.25rem;font-weight:700;color:var(--text-primary);margin:0 0 var(--space-xs) 0}.category-description{color:var(--text-secondary);margin:0 0 var(--space-sm) 0;line-height:1.5}.course-count{font-size:.875rem;color:var(--category-color, var(--primary-purple));font-weight:600}.category-arrow{font-size:1.5rem;color:var(--category-color, var(--primary-purple));transition:transform .3s ease}.category-card:hover .category-arrow{transform:translate(5px)}.featured-courses{padding:var(--space-2xl) 0;background:var(--bg-primary);width:100%;overflow:hidden;flex-shrink:0}.featured-courses-container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;box-sizing:border-box}.section-header{text-align:center;margin-bottom:var(--space-2xl)}.section-header h2{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-md)}.section-header p{font-size:1.125rem;color:var(--text-secondary)}.featured-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:var(--space-xl)}.featured-card{background:var(--bg-secondary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-xl);position:relative;transition:all .3s ease}[data-theme=dark] .featured-card{border-color:var(--gray-700)}.featured-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-xl)}.featured-badge{position:absolute;top:var(--space-md);right:var(--space-md);background:var(--gradient-primary);color:#fff;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-full);font-size:.75rem;font-weight:600}.featured-card h3{font-size:1.25rem;font-weight:700;color:var(--text-primary);margin:0 0 var(--space-md) 0}.featured-card p{color:var(--text-secondary);line-height:1.6;margin-bottom:var(--space-lg)}.featured-meta{display:flex;gap:var(--space-md);font-size:.875rem}.featured-meta span{padding:var(--space-xs) var(--space-sm);background:var(--bg-primary);border-radius:var(--radius-md);border:1px solid var(--gray-300)}[data-theme=dark] .featured-meta span{border-color:var(--gray-600)}.difficulty{color:var(--primary-purple);border-color:var(--primary-purple)!important;background:#667eea1a!important}.students{color:var(--success)}.price{color:var(--warning);font-weight:600}.cta-section{background:var(--gradient-primary);padding:var(--space-2xl) 0;text-align:center;color:#fff;width:100%;overflow:hidden;flex-shrink:0}.cta-container{max-width:800px;margin:0 auto;padding:0 24px;width:100%;box-sizing:border-box}.cta-section h2{font-size:2.5rem;font-weight:700;margin-bottom:var(--space-md)}.cta-section p{font-size:1.25rem;margin-bottom:var(--space-xl);opacity:.9}.cta-buttons{display:flex;gap:var(--space-md);justify-content:center}.cta-buttons .cta-primary{background:#fff;color:var(--primary-purple)}.cta-buttons .cta-primary:hover{color:var(--primary-purple);transform:translateY(-2px)}.cta-buttons .cta-secondary{background:transparent;color:#fff;border-color:#fff}.cta-buttons .cta-secondary:hover{background:#fff;color:var(--primary-purple)}.page-container{max-width:1200px;margin:0 auto;padding:0 24px var(--space-2xl) 24px;width:100%;box-sizing:border-box}.courses-search{background:var(--bg-primary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-lg);margin-bottom:var(--space-xl);box-shadow:var(--shadow-sm);width:100%;box-sizing:border-box;display:flex;justify-content:center}[data-theme=dark] .courses-search{border-color:var(--gray-700)}.search-container{position:relative;max-width:600px;width:100%}.courses-content{width:100%;box-sizing:border-box}.filters-row{display:flex;gap:var(--space-md);align-items:center;margin-bottom:var(--space-md)}.search-box{flex:1;min-width:300px}.search-input-container{position:relative}.search-icon{position:absolute;left:var(--space-sm);top:50%;transform:translateY(-50%);color:var(--text-tertiary)}.search-input{width:100%;padding:var(--space-sm) var(--space-sm) var(--space-sm) 2.5rem;border:1px solid var(--gray-300);border-radius:var(--radius-lg);font-size:1rem;background:var(--bg-primary);color:var(--text-primary);transition:all .2s ease}.search-input:focus{outline:none;border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a}.category-filter,.sort-filter{min-width:150px}.category-select,.sort-select{width:100%;padding:var(--space-sm) var(--space-md);border:2px solid var(--gray-300);border-radius:var(--radius-lg);font-size:1rem;background:var(--bg-primary);color:var(--text-primary);cursor:pointer;transition:all .2s ease;appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--gray-500) 50%),linear-gradient(135deg,var(--gray-500) 50%,transparent 50%);background-position:calc(100% - 15px) calc(1em + 2px),calc(100% - 10px) calc(1em + 2px);background-size:5px 5px,5px 5px;background-repeat:no-repeat}.category-select:hover,.sort-select:hover{border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a}.category-select:focus,.sort-select:focus{outline:none;border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea33}.quick-filters{border-top:1px solid var(--gray-200);padding-top:var(--space-md)}[data-theme=dark] .quick-filters{border-color:var(--gray-700)}.filter-tags{display:flex;gap:var(--space-sm);flex-wrap:wrap}.filter-tag{padding:var(--space-xs) var(--space-md);background:var(--bg-secondary);border:1px solid var(--gray-300);border-radius:var(--radius-full);font-size:.875rem;cursor:pointer;transition:all .2s ease;color:var(--text-secondary)}[data-theme=dark] .filter-tag{border-color:var(--gray-700)}.filter-tag:hover,.filter-tag.active{background:var(--primary-purple);border-color:var(--primary-purple);color:#fff}.courses-header{margin-bottom:var(--space-xl)}.courses-header h2{font-size:2rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-xs)}.search-results{color:var(--text-tertiary);font-style:italic}.no-courses{text-align:center;padding:var(--space-2xl);color:var(--text-secondary)}.no-courses-icon{font-size:4rem;margin-bottom:var(--space-lg)}.no-courses h3{font-size:1.5rem;margin-bottom:var(--space-md);color:var(--text-primary)}.tokens-intro{display:grid;grid-template-columns:2fr 1fr;gap:var(--space-xl);margin-bottom:var(--space-2xl);align-items:center;width:100%;box-sizing:border-box}.intro-content h2{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-md)}.intro-content p{font-size:1.125rem;color:var(--text-secondary);line-height:1.6}.balance-card{background:var(--gradient-primary);color:#fff;padding:var(--space-xl);border-radius:var(--radius-xl);text-align:center;box-shadow:var(--shadow-lg)}.balance-label{font-size:.875rem;opacity:.8;margin-bottom:var(--space-xs)}.balance-amount{font-size:2.5rem;font-weight:800;margin-bottom:var(--space-xs)}.balance-usd{font-size:1rem;opacity:.7}.exchange-section{background:var(--bg-primary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-xl);margin-bottom:var(--space-2xl);box-shadow:var(--shadow-lg)}[data-theme=dark] .exchange-section{border-color:var(--gray-700)}.usage-guide{margin-bottom:var(--space-2xl);width:100%;box-sizing:border-box}.usage-guide h3{font-size:1.75rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-lg);text-align:center}.guide-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--space-lg)}.guide-item{background:var(--bg-secondary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-xl);text-align:center;transition:all .3s ease}[data-theme=dark] .guide-item{border-color:var(--gray-700)}.guide-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.guide-icon{font-size:2.5rem;margin-bottom:var(--space-md)}.guide-item h4{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin-bottom:var(--space-sm)}.guide-item p{color:var(--text-secondary);line-height:1.5}.transaction-history{margin-bottom:var(--space-2xl);width:100%;box-sizing:border-box}.transaction-history h3{font-size:1.75rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-lg)}.history-table{background:var(--bg-primary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);overflow:hidden}[data-theme=dark] .history-table{border-color:var(--gray-700)}.history-header{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:var(--space-md);padding:var(--space-md) var(--space-lg);background:var(--bg-tertiary);font-weight:600;color:var(--text-secondary);font-size:.875rem;text-transform:uppercase;letter-spacing:.05em}.history-empty{padding:var(--space-2xl);text-align:center;color:var(--text-secondary)}.empty-icon{font-size:3rem;margin-bottom:var(--space-md)}.history-empty p{font-size:1.125rem;margin-bottom:var(--space-xs);color:var(--text-primary)}.history-empty small{color:var(--text-tertiary)}.risk-notice{margin-top:var(--space-xl);background:#f59e0b1a;border:1px solid rgba(245,158,11,.3);border-radius:var(--radius-xl);padding:var(--space-xl)}.notice-header{display:flex;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-md)}.notice-icon{font-size:1.25rem}.notice-header h4{font-size:1.25rem;font-weight:600;color:var(--warning);margin:0}.risk-notice ul{list-style:none;padding:0;margin:0}.risk-notice li{padding:var(--space-xs) 0;color:var(--text-secondary);position:relative;padding-left:var(--space-lg)}.risk-notice li:before{content:"•";position:absolute;left:0;color:var(--warning);font-weight:700}@media (max-width: 768px){.hero-content{grid-template-columns:1fr;gap:var(--space-xl);text-align:center}.hero-title-main{font-size:2.5rem}.hero-actions{justify-content:center}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--space-lg)}.categories-grid,.featured-grid{grid-template-columns:1fr}.cta-buttons{flex-direction:column;align-items:center}.filters-row{flex-direction:column;gap:var(--space-sm)}.search-box{min-width:unset}.tokens-intro{grid-template-columns:1fr;gap:var(--space-lg)}.guide-grid{grid-template-columns:1fr}.history-header{grid-template-columns:1fr;gap:var(--space-xs)}}.staking-system{background:var(--bg-primary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-xl);box-shadow:var(--shadow-lg);margin-bottom:var(--space-xl)}[data-theme=dark] .staking-system{border-color:var(--gray-700)}.staking-type-tabs{display:flex;margin-bottom:30px;background:var(--bg-secondary);border-radius:var(--radius-lg);padding:4px;box-shadow:var(--shadow-sm)}.type-button{flex:1;background:transparent;border:none;padding:12px 24px;border-radius:var(--radius-md);color:var(--text-secondary);font-weight:600;cursor:pointer;transition:all .3s ease;font-size:16px}.type-button.active{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-md)}.type-button:hover:not(.active){background:var(--bg-primary);color:var(--text-primary)}.staking-system h3{font-size:1.75rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-lg);text-align:center}.staking-system h4{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:var(--space-md);text-align:center}.staking-paused{text-align:center;padding:var(--space-xl);background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius-lg);color:var(--error)}.staking-paused h3{font-size:1.5rem;margin-bottom:var(--space-sm)}.stake-flow{margin-top:var(--space-lg)}.approval-step{text-align:center}.approval-note{display:block;margin-top:var(--space-sm);color:var(--text-tertiary);font-size:.875rem}.approve-btn,.stake-btn{width:100%;background:var(--gradient-primary);color:#fff;border:none;padding:var(--space-md) var(--space-lg);border-radius:var(--radius-lg);font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow-md)}.approve-btn:hover,.stake-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.approve-btn:disabled,.stake-btn:disabled{background:var(--gray-300);color:var(--gray-600);cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}.system-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--space-md);padding:var(--space-lg);background:var(--bg-secondary);border-radius:var(--radius-lg);margin-bottom:var(--space-lg)}.stat-item{display:flex;flex-direction:column;align-items:center;text-align:center;padding:var(--space-sm)}.stat-item span:first-child{font-size:.875rem;color:var(--text-tertiary);font-weight:500;margin-bottom:var(--space-xs)}.stat-item span:last-child{font-size:1.25rem;font-weight:700;color:var(--primary-purple)}.user-info{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--space-md);padding:var(--space-lg);background:#667eea0d;border:1px solid rgba(102,126,234,.2);border-radius:var(--radius-lg);margin-bottom:var(--space-lg)}.info-item{display:flex;flex-direction:column;align-items:center;text-align:center;padding:var(--space-sm)}.info-item span:first-child{font-size:.875rem;color:var(--text-secondary);font-weight:500;margin-bottom:var(--space-xs)}.info-item span:last-child{font-size:1.125rem;font-weight:700;color:var(--primary-purple-dark)}.staking-tabs{display:flex;gap:var(--space-xs);background:var(--bg-tertiary);padding:var(--space-xs);border-radius:var(--radius-lg);margin-bottom:var(--space-lg)}.tab-button{flex:1;padding:var(--space-sm) var(--space-md);background:transparent;border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all .2s ease}.tab-button.active,.tab-button:hover{background:var(--bg-primary);color:var(--primary-purple);box-shadow:var(--shadow-sm)}.stake-form,.withdraw-form,.rewards-form{display:grid;gap:var(--space-lg)}.stake-input,.withdraw-input{padding:var(--space-md);border:2px solid var(--gray-300);border-radius:var(--radius-lg);font-size:1rem;background:var(--bg-primary);color:var(--text-primary);transition:all .2s ease}.stake-input:focus,.withdraw-input:focus{outline:none;border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a}.staking-info,.withdraw-info{background:var(--bg-tertiary);padding:var(--space-md);border-radius:var(--radius-lg);border-left:4px solid var(--primary-purple);margin-bottom:var(--space-md)}.staking-info p,.withdraw-info p{margin:var(--space-xs) 0;color:var(--text-secondary);font-size:.875rem;line-height:1.5}.staking-info p:first-child,.withdraw-info p:first-child{margin-top:0}.staking-info p:last-child,.withdraw-info p:last-child{margin-bottom:0}.stake-btn,.withdraw-btn,.claim-btn{padding:var(--space-md) var(--space-xl);background:var(--gradient-primary);color:#fff;border:none;border-radius:var(--radius-lg);cursor:pointer;font-size:1rem;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-md);position:relative;overflow:hidden}.withdraw-btn{background:linear-gradient(135deg,var(--warning) 0%,#FBBF24 100%)}.claim-btn{background:linear-gradient(135deg,var(--success) 0%,#34D399 100%)}.stake-btn:hover:not(:disabled),.withdraw-btn:hover:not(:disabled),.claim-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.stake-btn:disabled,.withdraw-btn:disabled,.claim-btn:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}.rewards-info{background:var(--bg-secondary);padding:var(--space-xl);border-radius:var(--radius-lg);border:1px solid var(--gray-200);margin-bottom:var(--space-lg);text-align:center}[data-theme=dark] .rewards-info{border-color:var(--gray-700)}.rewards-info h4{font-size:1.25rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-md)}.rewards-info p{font-size:1rem;margin:var(--space-sm) 0;color:var(--text-secondary)}.rewards-info p:first-of-type{font-size:1.125rem;font-weight:600;color:var(--success)}.rewards-info p:last-of-type{font-size:.875rem;color:var(--text-tertiary)}.rewards-description{font-size:.875rem!important;color:var(--text-tertiary)!important;font-style:italic;margin-top:var(--space-md)!important}.staking-section{background:var(--bg-primary);padding:var(--space-xl);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);border:1px solid var(--gray-200);width:100%;box-sizing:border-box}[data-theme=dark] .staking-section{border-color:var(--gray-700)}@media (max-width: 768px){.system-stats,.user-info{grid-template-columns:1fr;gap:var(--space-sm)}.staking-tabs{flex-direction:column}.tab-button{text-align:center}.staking-system,.rewards-info{padding:var(--space-lg)}}@media (max-width: 480px){.staking-system{padding:var(--space-md);border-radius:var(--radius-lg)}.staking-system h3{font-size:1.5rem}.system-stats,.user-info{padding:var(--space-md)}.stat-item,.info-item{padding:var(--space-xs)}.stake-btn,.withdraw-btn,.claim-btn{padding:var(--space-sm) var(--space-lg);font-size:.875rem}}.courses-sort{background:var(--bg-primary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-lg);margin-bottom:var(--space-xl);box-shadow:var(--shadow-sm);display:flex;justify-content:flex-end;align-items:center}[data-theme=dark] .courses-sort{border-color:var(--gray-700)}.sort-section{display:flex;align-items:center;gap:var(--space-sm)}.sort-label{font-size:.875rem;font-weight:600;color:var(--text-secondary);margin:0}.sort-select-wrapper{position:relative;display:flex;align-items:center}.sort-select{appearance:none;background:var(--bg-primary);border:2px solid var(--gray-300);border-radius:var(--radius-lg);padding:var(--space-sm) 2.5rem var(--space-sm) var(--space-md);font-size:.875rem;font-weight:500;color:var(--text-primary);cursor:pointer;transition:all .2s ease;min-width:150px;background-color:var(--bg-primary)}.sort-select:hover{border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a}.sort-select:focus{outline:none;border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea33}[data-theme=dark] .sort-select{border-color:var(--gray-600);background-color:var(--bg-secondary)}.sort-arrow{position:absolute;right:var(--space-sm);color:var(--text-tertiary);pointer-events:none;transition:transform .2s ease}.sort-select:hover+.sort-arrow{color:var(--primary-purple)}.sort-select:focus+.sort-arrow{transform:rotate(180deg)}.courses-filter-bar{background:var(--bg-primary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-lg);margin-bottom:var(--space-xl);box-shadow:var(--shadow-sm);display:flex;align-items:center;gap:var(--space-lg)}[data-theme=dark] .courses-filter-bar{border-color:var(--gray-700)}.courses-filter-bar .search-container{flex:1;position:relative;max-width:none}.courses-filter-bar .sort-container{display:flex;align-items:center;gap:var(--space-sm);flex-shrink:0}.courses-filter-bar .sort-label{font-size:.875rem;font-weight:600;color:var(--text-secondary);margin:0;white-space:nowrap}.courses-filter-bar .sort-select-wrapper{position:relative;display:flex;align-items:center}.courses-filter-bar .sort-select{appearance:none;background:var(--bg-primary);border:2px solid var(--gray-300);border-radius:var(--radius-lg);padding:var(--space-sm) 2.5rem var(--space-sm) var(--space-md);font-size:.875rem;font-weight:500;color:var(--text-primary);cursor:pointer;transition:all .2s ease;outline:none;min-width:160px}.courses-filter-bar .sort-select:hover{border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea1a}.courses-filter-bar .sort-select:focus{border-color:var(--primary-purple);box-shadow:0 0 0 3px #667eea33}.courses-filter-bar .sort-arrow{position:absolute;right:var(--space-sm);color:var(--text-tertiary);pointer-events:none;transition:transform .2s ease}.courses-filter-bar .sort-select:hover+.sort-arrow{color:var(--primary-purple)}.courses-filter-bar .sort-select:focus+.sort-arrow{transform:rotate(180deg)}@media (max-width: 768px){.courses-filter-bar{flex-direction:column;align-items:stretch;gap:var(--space-md)}.courses-filter-bar .search-container{max-width:none}.courses-filter-bar .sort-container{justify-content:center;flex-direction:column;gap:var(--space-xs);text-align:center}.courses-filter-bar .sort-select{min-width:200px}}@media (max-width: 480px){.courses-filter-bar{padding:var(--space-md)}.courses-filter-bar .sort-select{min-width:180px;font-size:.75rem;padding:var(--space-xs) 2rem var(--space-xs) var(--space-sm)}}.course-list-empty,.course-list-loading{text-align:center;padding:var(--space-2xl);color:var(--text-secondary);background:var(--bg-secondary);border-radius:var(--radius-lg);border:1px dashed var(--gray-300);margin:var(--space-xl) 0}[data-theme=dark] .course-list-empty,[data-theme=dark] .course-list-loading{border-color:var(--gray-600)}.course-list-empty:before{content:"🔍";font-size:3rem;display:block;margin-bottom:var(--space-md)}.course-list-loading:before{content:"⏳";font-size:3rem;display:block;margin-bottom:var(--space-md)}.course-card-loading{background:var(--bg-tertiary);border:1px solid var(--gray-200);border-radius:var(--radius-xl);padding:var(--space-xl);text-align:center;color:var(--text-tertiary);animation:pulse 2s ease-in-out infinite}[data-theme=dark] .course-card-loading{border-color:var(--gray-700)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}@media (max-width: 768px){.courses-sort{justify-content:center;padding:var(--space-md)}.sort-section{flex-direction:column;gap:var(--space-xs);text-align:center}.sort-select{min-width:200px}}@media (max-width: 480px){.courses-sort{padding:var(--space-sm)}.sort-select{min-width:180px;font-size:.75rem;padding:var(--space-xs) 2rem var(--space-xs) var(--space-sm)}}