*{margin:0;padding:0;box-sizing:border-box}@media screen and (max-width:768px){input,select,textarea{font-size:16px!important}}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:#333;background-color:#f8f9fa}#root{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;min-height:calc(100vh - 80px);padding-top:80px}.page-container{max-width:1200px;margin:0 auto;padding:2rem}.page-description{color:#666;margin-bottom:2rem;font-size:1.1rem}.navbar{position:fixed;top:0;width:100%;background:#1b4332;box-shadow:0 2px 12px #0003;z-index:1000}.navbar:before{content:"";position:absolute;top:0;left:0;right:0;height:100%;z-index:0;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 70' preserveAspectRatio='none'%3E%3Cpath d='M0,70 L0,40 Q100,15 200,35 Q300,55 400,30 Q500,5 600,25 Q700,50 800,20 Q900,0 1000,30 Q1100,50 1200,25 L1200,70 Z' fill='%23112e21' opacity='0.4'/%3E%3Cpath d='M0,70 L0,50 Q80,30 160,45 Q240,60 340,35 Q440,10 540,30 Q640,50 740,25 Q840,5 940,30 Q1040,50 1200,35 L1200,70 Z' fill='%230d2418' opacity='0.35'/%3E%3C/svg%3E") repeat-x bottom;background-size:1200px 70px;pointer-events:none}.nav-container{position:relative;z-index:1;max-width:1400px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:0 2rem 0 .75rem;height:70px}.nav-brand{display:flex;align-items:center;gap:.5rem;color:#fff;text-decoration:none;font-weight:700;font-size:1.2rem}.brand-ja{font-size:1.5rem;color:#b7e4c7}.nav-links{display:flex;gap:2rem;flex:1;align-items:center}.nav-auth-links{display:flex;gap:.5rem;margin-left:auto;align-items:center}.user-dropdown{margin-left:auto}.nav-link{color:#fff;text-decoration:none;padding:.5rem 1rem;border-radius:5px;transition:background-color .3s}.nav-link:hover,.nav-link.active{background-color:#ffffff1f}button.nav-link{background:transparent;border:none;font:inherit;cursor:pointer}.dropdown-toggle:after{content:" ▾";font-size:.8em}.nav-dropdown{position:relative;display:flex;align-items:center}.dropdown-menu{position:absolute;top:100%;left:0;background:#fff;border-radius:8px;box-shadow:0 4px 20px #00000026;min-width:150px;padding:.5rem 0;z-index:1001}.dropdown-item{display:block;padding:.75rem 1.25rem;color:#333;text-decoration:none;transition:background-color .2s}.dropdown-item:hover{background-color:#f8f9fa;color:#2e7d32}.nav-mobile-actions{display:none;align-items:center;gap:.5rem}.nav-mobile-actions .nav-mobile-search-btn{display:flex}.nav-drawer-backdrop{display:none}.hamburger{display:flex;flex-direction:column;justify-content:space-between;width:28px;height:20px;background:transparent;border:none;cursor:pointer;padding:0;z-index:1002}.hamburger span{display:block;width:100%;height:3px;background:#fff;border-radius:2px;transition:all .3s ease}.hamburger.open span:nth-child(1){transform:translateY(8.5px) rotate(45deg)}.hamburger.open span:nth-child(2){opacity:0}.hamburger.open span:nth-child(3){transform:translateY(-8.5px) rotate(-45deg)}.footer{background:#14291e;color:#d4e7dc;margin-top:auto}.footer-container{max-width:1200px;margin:0 auto;padding:3rem 2rem 2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}.footer-section h4{margin-bottom:1rem;color:#81c784}.footer-section ul{list-style:none}.footer-section li{margin-bottom:.5rem}.footer-section a{color:#a0c4ab;text-decoration:none;transition:color .2s}.footer-section a:hover{color:#b7e4c7}.footer-bottom{border-top:1px solid #1f3d2b;padding:1rem 2rem;text-align:center;color:#7a9e85}.form-section{background:#fff;padding:2rem;border-radius:10px;box-shadow:0 2px 10px #0000001a;margin-bottom:2rem}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;margin-bottom:2rem}.form-group{display:flex;flex-direction:column}.form-group.full-width{grid-column:1 / -1}.form-group label{margin-bottom:.5rem;font-weight:600;color:#555}.form-group input,.form-group select,.form-group textarea{padding:.75rem;border:2px solid #e1e5e9;border-radius:5px;font-size:1rem;transition:border-color .3s}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:#2e7d32}.checkbox-label{flex-direction:row;align-items:center;gap:.5rem}.checkbox-label input{width:auto}.form-actions{display:flex;gap:1rem}.btn{padding:.75rem 1.5rem;border:none;border-radius:5px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s;text-decoration:none;display:inline-block;text-align:center}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:#2d6a4f;color:#fff}.btn-primary:hover:not(:disabled){background:#1b4332;transform:translateY(-2px);box-shadow:0 4px 15px #1b433266}.btn-secondary{background:#6c757d;color:#fff}.btn-secondary:hover:not(:disabled){background:#5a6268}.btn-danger{background:#dc3545;color:#fff}.btn-danger:hover:not(:disabled){background:#c82333}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.translate-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-bottom:2rem}.input-section{display:flex;flex-direction:column}.input-section label{margin-bottom:.5rem;font-weight:600;color:#555}.input-section textarea{padding:1rem;border:2px solid #e1e5e9;border-radius:5px;font-size:1rem;resize:vertical;transition:border-color .3s}.input-section textarea:focus{outline:none;border-color:#2e7d32}.output-section{background:#fff;padding:2rem;border-radius:10px;box-shadow:0 2px 10px #0000001a;margin-top:2rem}.output-section h3{margin-bottom:1rem;color:#333}.output-section pre{white-space:pre-wrap;font-family:inherit;line-height:1.6;color:#555}.list-section{background:#fff;padding:2rem;border-radius:10px;box-shadow:0 2px 10px #0000001a}.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem;margin-top:1.5rem}.vocab-card{background:#f8f9fa;border:1px solid #e9ecef;border-radius:10px;padding:1.5rem;transition:transform .3s,box-shadow .3s}.vocab-card:hover{transform:translateY(-2px);box-shadow:0 4px 15px #0000001a}.vocab-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.5rem}.vocab-header h3{color:#333;font-size:1.3rem;margin:0}.badge{background:#2e7d32;color:#fff;padding:.25rem .5rem;border-radius:15px;font-size:.75rem;font-weight:600}.reading{color:#666;font-style:italic;margin-bottom:.5rem}.meaning{color:#333;font-weight:500;margin-bottom:.5rem}.formation{color:#007bff;font-size:.9rem;margin-bottom:.5rem}.notes{color:#666;font-size:.9rem;margin-bottom:1rem}.card-actions{display:flex;gap:.5rem;margin-top:1rem}.export-section{background:#fff;padding:2rem;border-radius:10px;box-shadow:0 2px 10px #0000001a;margin-bottom:2rem}.info-section{background:#fff;padding:2rem;border-radius:10px;box-shadow:0 2px 10px #0000001a}.info-section ol,.info-section ul{margin-left:2rem;margin-bottom:1rem}.info-section li{margin-bottom:.5rem}.code-block{background:#f8f9fa;border:1px solid #e9ecef;border-radius:5px;padding:1rem;font-family:Courier New,monospace;font-size:.9rem;white-space:pre-wrap;overflow-x:auto}.furigana-ruby-container{font-size:2.5rem;font-weight:700;color:#333;line-height:4rem;padding-top:1rem}.ruby-text{margin:0 .1rem;ruby-position:over}.ruby-text rt{font-size:1rem;color:#2e7d32;font-weight:500;margin-bottom:.5rem}.audio-btn{background:#2e7d32;color:#fff;border:none;padding:.5rem 1rem;border-radius:20px;cursor:pointer;font-size:.9rem;font-weight:600;transition:all .3s}.audio-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 15px #2e7d3266}.audio-btn:disabled{opacity:.6;cursor:not-allowed}.flashcard-preview{background:#f0f5f0}.flashcard-preview-front,.flashcard-preview-back{padding:1rem 0}.flashcard-preview-front h4,.flashcard-preview-back h4{font-size:.75rem;text-transform:uppercase;color:#2e7d32;margin-bottom:.5rem;letter-spacing:1px}.flashcard-preview-front p,.flashcard-preview-back p{color:#333;font-size:1rem;line-height:1.5;margin:0}.flashcard-preview-divider{height:1px;background:#2e7d32;margin:1rem 0}.flashcard-preview-notes{background:#fff3cd;padding:.75rem;border-radius:5px;border-left:3px solid #ffc107;margin-top:1rem;font-size:.9rem}.flashcard-stats{text-align:center;color:#666;font-size:.85rem;margin-top:1rem;padding-top:1rem;border-top:1px solid #dee2e6}.flashcard-controls{display:flex;gap:1.5rem;margin-bottom:2rem;flex-wrap:wrap;align-items:end}.control-group{display:flex;flex-direction:column;min-width:150px}.control-group label{margin-bottom:.5rem;font-weight:600;color:#555;font-size:.9rem}.control-group select{padding:.5rem;border:2px solid #e1e5e9;border-radius:5px;font-size:.9rem}.no-cards{text-align:center;padding:4rem 2rem;color:#666;font-size:1.2rem;background:#fff;border-radius:10px;box-shadow:0 2px 10px #0000001a}.flashcard-container{max-width:600px;margin:0 auto}.flashcard-header{text-align:center;margin-bottom:1rem}.card-counter{background:#2e7d32;color:#fff;padding:.5rem 1rem;border-radius:20px;font-size:.9rem;font-weight:600}.flashcard{perspective:1000px;height:400px;margin-bottom:2rem}.flashcard-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;background:#fff;border-radius:15px;box-shadow:0 8px 25px #00000026;display:flex;align-items:center;justify-content:center;padding:2rem}.flashcard-back{transform:rotateY(180deg)}.flashcard-content{text-align:center;width:100%}.flashcard-main{font-size:2.5rem;font-weight:700;color:#333;margin-bottom:1rem;line-height:1.2}.flashcard-reading{font-size:1.5rem;color:#666;font-style:italic;margin-bottom:1rem}.flashcard-formation{font-size:1rem;color:#007bff;margin-bottom:1rem}.flashcard-type{font-size:.9rem;color:#999;text-transform:uppercase;letter-spacing:1px;margin-top:1rem}.flashcard-answer{margin-bottom:1.5rem}.flashcard-examples{text-align:left;max-width:400px;margin:1.5rem auto 0}.flashcard-examples h4{color:#2e7d32;margin-bottom:1rem;font-size:1rem}.example{margin-bottom:1rem;padding:.75rem;background:#f8f9fa;border-radius:8px;border-left:3px solid #2e7d32}.example-jp{font-weight:600;color:#333;margin-bottom:.25rem}.example-en{color:#666;font-size:.9rem}.flashcard-notes{margin-top:1rem;padding:1rem;background:#fff3cd;border-radius:8px;border-left:3px solid #ffc107;text-align:left;font-size:.9rem}.flashcard-actions{display:flex;gap:1rem;justify-content:center;margin-bottom:1rem}.keyboard-hints{text-align:center;color:#666;font-size:.9rem;padding:1rem;background:#f8f9fa;border-radius:8px}@media(max-width:768px){.nav-container{flex-direction:row;height:60px;padding:0 1rem}.nav-mobile-actions{display:flex}.nav-desktop-search{display:none!important}.nav-drawer-backdrop{display:block;position:fixed;inset:60px 0 0;background:#0006;z-index:1000}.nav-search-dropdown{position:fixed!important;top:60px!important;left:0!important;right:0!important;width:100%!important;max-width:100%!important;border-radius:0 0 12px 12px!important;border-top:none!important}.nav-links{position:fixed;width:280px;inset:60px 0 0 auto;background:#1b4332;flex-direction:column;align-items:stretch;justify-content:flex-start;padding-top:1.5rem;gap:0;transform:translate(100%);transition:transform .3s ease;z-index:1001;box-shadow:-4px 0 20px #0003;overflow-y:auto;overflow-x:hidden}.nav-links:before{content:"";position:absolute;top:0;left:-30px;width:30px;height:100%;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 800' preserveAspectRatio='none'%3E%3Cpath d='M30,0 L30,800 L10,800 Q20,750 8,700 Q0,650 12,600 Q22,550 8,500 Q0,450 10,400 Q22,350 8,300 Q0,250 12,200 Q22,150 8,100 Q0,50 10,0 Z' fill='%231b4332'/%3E%3C/svg%3E") no-repeat;background-size:30px 100%;pointer-events:none}.nav-links:after{content:"";position:absolute;bottom:0;left:0;right:0;height:120px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 280 120'%3E%3Cpath d='M0,120 L0,70 Q40,40 80,60 Q120,80 160,50 Q200,20 240,50 Q260,65 280,55 L280,120 Z' fill='%23112e21' opacity='0.5'/%3E%3Cpath d='M0,120 L0,85 Q35,60 70,75 Q105,90 140,65 Q175,40 210,60 Q245,80 280,70 L280,120 Z' fill='%230d2418' opacity='0.6'/%3E%3C/svg%3E") no-repeat bottom;background-size:100% 120px;pointer-events:none}.nav-links.open{transform:translate(0)}.nav-link{width:100%;text-align:left;padding:1rem 1.5rem;font-size:1.05rem}.nav-auth-links{flex-direction:column;align-items:stretch;margin-left:0;gap:0;width:100%}.user-dropdown{margin-left:0}.nav-dropdown{width:100%;flex-direction:column}.dropdown-menu{position:static;background:#ffffff1a;box-shadow:none;width:100%;border-radius:0}.dropdown-item{color:#fff;text-align:left;padding:.75rem 2rem}.dropdown-item:hover{background:#fff3;color:#fff}.nav-inline-dropdown{position:static!important;background:#ffffff1a!important;border:none!important;border-radius:0!important;box-shadow:none!important;min-width:0!important;width:100%}.nav-inline-dropdown .nav-inline-dropdown-item{color:#ffffffe6!important;padding:.75rem 2rem!important;font-size:.95rem!important;border-bottom-color:#ffffff1a!important}.nav-inline-dropdown button.nav-inline-dropdown-item{color:#ffffffe6!important;text-align:left!important}.user-dropdown-trigger{width:100%;background:transparent!important;border:none!important;border-radius:5px!important;color:#fff!important;font-size:1.05rem!important;padding:1rem 1.5rem!important;justify-content:flex-start}.user-dropdown-trigger:hover{background:#fff3!important}.nav-dropdown-wrapper{flex-direction:column!important;align-items:stretch!important;width:100%}.main-content{padding-top:70px;min-height:calc(100vh - 70px)}.page-container{padding:1rem}.translate-grid,.form-grid,.vocab-grid{grid-template-columns:1fr}.footer-container{grid-template-columns:1fr;text-align:center}.flashcard-controls{flex-direction:column;align-items:stretch}.control-group{min-width:auto}.flashcard{height:350px}.flashcard-main{font-size:2rem}.flashcard-actions{flex-direction:column;align-items:center}.flashcard-actions .btn{width:200px}}.skeleton{background:linear-gradient(90deg,#e9ecef 25%,#f3f4f6,#e9ecef 75%);background-size:200% 100%;animation:skeleton-shimmer 1.5s ease-in-out infinite}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}