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#e2e8f0;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;padding:1rem;transition:all .2s;display:flex}.share-button:hover{background-color:#f8fafc;border-color:#4a6cf7}.share-button.active{background-color:#eff6ff;border-color:#4a6cf7}.share-icon{margin-bottom:.5rem;font-size:1.5rem}.share-name{color:#475569;font-size:.875rem;font-weight:500}.invite-form{border-top:1px solid #e2e8f0;padding-top:2rem}.invite-form .form-group{margin-bottom:1.5rem}.invite-form label{color:#475569;margin-bottom:.5rem;font-weight:500;display:block}.invite-form input,.invite-form textarea{width:100%;font-size:1rem;font-family:var(--font-family);border:1px solid #e2e8f0;border-radius:6px;padding:.75rem;transition:border-color .2s}.invite-form input:focus,.invite-form textarea:focus{border-color:#4a6cf7;outline:none;box-shadow:0 0 0 3px #4a6cf71a}.submit-button{color:#fff;cursor:pointer;width:100%;font-size:1rem;font-weight:500;font-family:var(--font-family);background-color:#4a6cf7;border:none;border-radius:6px;padding:.75rem;transition:background-color .2s}.submit-button:hover{background-color:#3a5ce5}@media (width<=768px){.nav-item.user-info{margin:10px 0}.username{margin:5px 15px;display:inline-flex}.user-dropdown{border-radius:12px 12px 0 0;max-height:80vh;margin:0;position:fixed;inset:auto 0 0;overflow-y:auto}.dropdown-item{padding:1rem}}@media (width<=480px){.tiles-grid{grid-template-columns:repeat(4,1fr);gap:5px}.tile{height:60px;padding:3px;font-size:16px}.tile[data-length=long]{font-size:14px}.tile[data-length=very-long]{font-size:12px}.tile[data-length=extra-long]{font-size:10px}.control-buttons{flex-direction:column}}@media (width<=640px){.invite-container{padding:1rem}.invite-card{padding:1.5rem}.sharing-methods{grid-template-columns:repeat(2,1fr)}}.ribbon{z-index:150;width:150px;height:150px;position:absolute;overflow:hidden}.ribbon:before,.ribbon:after{z-index:-1;content:"";border:5px solid #2980b9;display:block;position:absolute}.ribbon span{background-color:var(--category-blue);color:#fff;width:225px;font-size:15px;font-weight:700;line-height:1;font-family:var(--font-family);text-shadow:0 1px 4px #0003;text-transform:uppercase;text-align:center;padding:5px 0;display:block;position:absolute;box-shadow:0 5px 10px #0000001a}.ribbon a{color:#fff;text-decoration:none}.ribbon-top-left{top:-5px;left:-5px}.ribbon-top-left:before,.ribbon-top-left:after{border-top-color:#0000;border-left-color:#0000}.ribbon-top-left:before{top:5px;right:0}.ribbon-top-left:after{bottom:0;left:5px}.ribbon-top-left span{top:45px;right:-25px;transform:rotate(-45deg)}.archive-page h1{text-align:center;margin-bottom:var(--spacing-sm)}.archive-page>.container>p{text-align:center;color:var(--text-light);margin-bottom:var(--spacing-xl)}.archive-grid{gap:var(--spacing-lg);grid-template-columns:repeat(auto-fill,minmax(250px,1fr));display:grid}.archive-item{border:1px solid var(--border);border-radius:var(--border-radius-md);transition:all var(--transition-fast);position:relative;overflow:hidden}.archive-item:hover{box-shadow:var(--shadow-md);transform:translateY(-5px)}.archive-item-content{padding:var(--spacing-lg)}.archive-item-content.resulted{background-color:#acf2ca}.archive-item h3{margin-bottom:var(--spacing-xs)}.archive-play-button{text-align:center;margin-top:var(--spacing-md)}.archive-play-button .difficulty-selector-buttons{margin-top:0}.archive-play-button .btn-difficulty-small{text-decoration:none;display:inline-block}.breadcrumb{font-size:var(--font-size-sm);color:var(--text-light);margin-bottom:var(--spacing-md)}.breadcrumb a{color:var(--text-light)}.breadcrumb a:hover{color:var(--text)}.breadcrumb .separator{margin:0 .4rem}.tiles-static .tile{cursor:default}.tiles-static .tile:hover{background-color:#f0f0f0;transform:none}.tiles-static{margin-bottom:var(--spacing-lg)}.puzzle-page{max-width:500px;margin:0 auto}.puzzle-nav{justify-content:space-between;gap:var(--spacing-md);margin-top:var(--spacing-xl);flex-wrap:wrap;display:flex}.puzzle-nav .btn{flex:0 auto}.pagination{justify-content:space-between;align-items:center;gap:var(--spacing-md);margin-top:var(--spacing-xl);display:flex}.pagination-info{color:var(--text-light);font-size:var(--font-size-sm)}.mobile-menu-toggle{padding:var(--spacing-xs);background:0 0;border:none;display:none}.bar{background-color:var(--text);width:25px;height:3px;transition:all var(--transition-fast);margin:5px auto;display:block}@media (width<=768px){.mobile-menu-toggle{display:block}.nav-menu{width:100%;height:calc(100vh - 60px);padding-top:var(--spacing-xl);transition:left var(--transition-normal);z-index:100;background-color:#fff;flex-direction:column;justify-content:flex-start;align-items:center;position:fixed;top:60px;left:-100%}.nav-menu.active{left:0}.nav-list{flex-direction:column;align-items:center}.nav-item{margin:0 0 var(--spacing-lg) 0}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.game-board.shake,.game-page.resetting,.game-page:not(.resetting){animation:none}.tile,.btn,.btn-primary,.btn-difficulty-small,.btn-share,.btn-register,.archive-item,a{transition:none}}