@import url(https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700&display=swap);:root{--font-size-xs:0.875rem;--font-size-sm:1rem;--font-size-base:1.125rem;--font-size-lg:1.25rem;--font-size-xl:1.5rem;--font-size-2xl:1.875rem;--font-size-3xl:2.25rem;--font-size-4xl:3rem}html{font-size:16px}body{margin:0;padding:0;font-family:"Noto Sans KR",-apple-system,BlinkMacSystemFont,"Segoe UI","Roboto","Oxygen","Ubuntu","Cantarell","Fira Sans","Droid Sans","Helvetica Neue",sans-serif;font-size:var(--font-size-base);line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (max-width:768px){html{font-size:15px}body{font-size:1rem}}@media (max-width:480px){html{font-size:14px}}code{font-family:source-code-pro,Menlo,Monaco,Consolas,"Courier New",monospace}.stat-number{font-size:var(--font-size-4xl)!important;font-weight:700!important;line-height:1.2}.stat-label-text{font-size:var(--font-size-sm)!important;font-weight:500;margin-top:.5rem}h1{font-size:var(--font-size-3xl);font-weight:700}h1,h2{line-height:1.3}h2{font-size:var(--font-size-2xl)}h2,h3{font-weight:600}h3{font-size:var(--font-size-xl)}h3,h4{line-height:1.4}h4{font-size:var(--font-size-lg);font-weight:500}button:not(.nav-btn):not(.icon-btn){font-size:var(--font-size-sm)!important;padding:.75rem 1.25rem!important;font-weight:500}button.btn-sm{font-size:var(--font-size-xs)!important;padding:.5rem 1rem!important}button.btn-lg{font-size:var(--font-size-lg)!important;padding:1rem 1.5rem!important}input,select,textarea{font-size:var(--font-size-sm)!important;padding:.875rem 1rem!important}p{font-size:var(--font-size-base);line-height:1.8;margin-bottom:1rem}small{font-size:var(--font-size-xs)!important}label{font-size:var(--font-size-sm);font-weight:500;margin-bottom:.5rem;display:block}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,sans-serif;line-height:1.6;color:#333;background-color:#f5f5f5}.App{min-height:100vh}.Card{background:#fff;border-radius:12px;box-shadow:0 2px 8px rgba(0,0,0,.1);padding:1.5rem;margin-bottom:1rem;display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:200px;transition:transform .2s ease,box-shadow .2s ease}.Card:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(0,0,0,.15)}.Deck{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px rgba(0,0,0,.1);display:flex;flex-direction:column;justify-content:center;align-items:center;transition:transform .2s ease}.Deck:hover{transform:translateY(-2px)}.AddCardForm{display:flex;flex-direction:column;justify-content:center;align-items:center;grid-gap:1rem;gap:1rem}.manage-deck h1{text-align:center}button{cursor:pointer;border:none;border-radius:6px;padding:.5rem 1rem;font-size:1rem;font-weight:500;transition:all .2s ease}button:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover:not(:disabled){opacity:.9;transform:translateY(-1px)}.btn-secondary{background:#e0e0e0;color:#333}.btn-secondary:hover:not(:disabled){background:#d0d0d0}.btn-danger{background:#dc3545;color:#fff}.btn-danger:hover:not(:disabled){background:#c82333}input,select,textarea{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:6px;font-size:1rem;transition:border-color .2s ease,box-shadow .2s ease}input:focus,select:focus,textarea:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,.1)}a{color:#667eea;text-decoration:none;transition:color .2s ease}a:hover{color:#764ba2}ol,ul{list-style:none}li{padding:10px}.text-center{text-align:center}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.row{display:flex;flex-wrap:wrap;margin:-.5rem}.col{flex:1 1}.col,.col-6{padding:.5rem}.col-6{flex:0 0 50%}.col-12{flex:0 0 100%;padding:.5rem}.col-sm-6{flex:0 0 50%;padding:.5rem}@media (max-width:768px){.col-6,.col-sm-6{flex:0 0 100%}}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));grid-gap:1rem;gap:1rem;margin-bottom:1.5rem}.stat-card{background:#fff;border-radius:12px;padding:1.5rem;text-align:center;box-shadow:0 2px 8px rgba(0,0,0,.1)}.stat-value{font-size:2rem;font-weight:700;color:#667eea}.stat-label{font-size:.875rem;color:#666;margin-top:.25rem}.deck-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:1rem;gap:1rem}.deck-card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px rgba(0,0,0,.1);transition:transform .2s ease,box-shadow .2s ease}.deck-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.15)}.deck-card h3{margin-bottom:.5rem;color:#333}.deck-card p{color:#666;font-size:.9rem;margin-bottom:1rem}.loading{text-align:center;padding:2rem;color:#666}.error{background:#fee;color:#c00}.error,.success{padding:1rem;border-radius:6px;margin-bottom:1rem}.success{background:#efe;color:#080}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.modal-content{background:#fff;border-radius:12px;padding:2rem;max-width:500px;width:100%;max-height:90vh;overflow-y:auto}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;grid-gap:1rem;gap:1rem}.page-header h2{margin:0;font-size:1.75rem;color:#333}.empty-state{text-align:center;padding:3rem;color:#666}.card-li,.empty-state h3{margin-bottom:.5rem}.card-li{background:#fff;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.1)}
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