.sudoku-game-wrapper{box-sizing:border-box;-webkit-user-select:none;user-select:none;flex-direction:column;align-items:center;width:100%;padding:0;display:flex}.sudoku-game-wrapper.fullscreen{z-index:9999;background:#fff;width:100vw;height:100vh;padding:20px;position:fixed;inset:0;overflow-y:auto}body.sudoku-fullscreen-mode header,body.sudoku-fullscreen-mode footer,body.sudoku-fullscreen-mode .sidebar{display:none!important}body.sudoku-fullscreen-mode .page{display:block!important}.sidebar-header{justify-content:space-between;align-items:center;display:flex}.back-to-menu-btn{cursor:pointer;color:#64748b;background:0 0;border:none;border-radius:8px;align-items:center;gap:8px;margin-left:-12px;padding:8px 12px;font-size:.95rem;font-weight:600;transition:all .2s;display:flex}.back-to-menu-btn:hover{color:#1e293b;background:#0000000d}.header-icons{gap:12px;display:flex}.sudoku-header{justify-content:space-between;align-items:center;width:100%;padding:10px 0;display:flex}.sudoku-board-container{aspect-ratio:1;background:#fff;justify-content:center;align-items:center;width:100%;max-width:80dvh;height:80dvh;display:flex;position:relative}.sudoku-grid{border:2px solid #000;grid-template-rows:repeat(9,1fr);grid-template-columns:repeat(9,1fr);width:100%;height:100%;display:grid}.sudoku-cell{box-sizing:border-box;cursor:pointer;border:1px solid #ccc;justify-content:center;align-items:center;font-size:clamp(14px,4cqi,32px);display:flex;position:relative}.sudoku-cell:nth-child(3n){border-right:2px solid #000}.sudoku-cell:nth-child(9n){border-right:1px solid #ccc}.sudoku-cell:nth-child(n+19):nth-child(-n+27),.sudoku-cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid #000}.sudoku-cell.selected{background-color:#bbdefb!important}.sudoku-cell.highlight-digit{background-color:#e3f2fd}.sudoku-cell.given{color:#000;font-weight:700}.sudoku-cell.user-value{color:#1976d2}.sudoku-cell.invalid{background-color:#ffcdd2}.sudoku-cell.is-hint{animation:.4s ease-in-out infinite hintFlicker;background-color:#c8e6c9!important}@keyframes 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.centre-dots{letter-spacing:0;gap:0;font-size:8px;font-weight:700;display:flex}.number-btn{justify-content:center;align-items:center;width:40px;height:40px;font-size:1.2em;display:flex}.game-sudoku .page{grid-template-columns:1fr}.game-sudoku .page .sidebar{display:none}.number-buttons{grid-template-columns:repeat(3,1fr);gap:5px;display:grid}.hint-btn{color:#c53030;background:#fdf2f2;border-color:#feb2b2;justify-content:center;align-items:center;width:100%;font-weight:600;display:flex}@media (max-width:1000px){.sudoku-board-container{aspect-ratio:1;width:100%;max-width:100dvw;height:auto;margin:0 auto}.sudoku-game-wrapper{padding:0}}@media (min-width:1001px){.sudoku-main-area{flex-direction:row;justify-content:center;align-items:flex-start;gap:30px;width:100%;display:flex}.sudoku-board-container{flex-shrink:0}.sudoku-controls{flex-direction:column;gap:20px;width:180px;padding:0}.stats-box{text-align:center;border-bottom:2px solid #f1f5f9;margin-bottom:5px;padding:5px 0}.timer-val{color:#1e293b;font-size:1.2rem;font-weight:700}.difficulty-val{color:#64748b;text-transform:uppercase;letter-spacing:1px;font-size:.8rem}.mode-buttons{flex-direction:column}.mode-buttons .control-btn,.number-btn{width:100%}.action-buttons{grid-template-columns:1fr 1fr 1fr;display:grid}.action-buttons .control-btn{width:100%}.hints-section{flex-direction:column;gap:6px;margin-top:10px;display:flex}.section-label{color:#94a3b8;text-transform:uppercase;letter-spacing:1.5px;text-align:center;margin-bottom:2px;font-size:.75rem;font-weight:700}.hint-btn:hover{background:#fff5f5;border-color:#fc8181}.share-btn{display:none}}.sudoku-header-title{justify-content:space-between;align-items:center;gap:1rem;width:100%;margin-bottom:10px;padding:0;display:flex}.sudoku-header-title h1{margin:0;padding:0;font-size:1.5rem}.header-icons{align-items:center;gap:.75rem;display:flex}.icon-btn{cursor:pointer;background:0 0;border:none;padding:0;font-size:1.5rem}.share-facebook-btn{color:inherit;flex-direction:column;align-items:center;gap:0;text-decoration:none;display:flex;position:relative}.share-facebook-btn img{width:24px;height:24px}.share-facebook-btn:after{content:"сподели";font-size:8px;line-height:10px;position:absolute;bottom:-10px;left:50%;transform:translate(-50%)}.fullscreen-toggle{cursor:pointer;background:50%/auto 30px no-repeat;border:none;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.corner-mark.conflict{color:#d32f2f}.sidebar-header{justify-content:space-between;align-items:center;gap:.5rem;display:flex}.sidebar-header h2{margin:0;padding:0;font-size:1.3rem}.icon-action-btn{justify-content:center;align-items:center;min-width:40px;padding:8px;display:flex}.icon-action-btn svg{display:block}.clear-btn{justify-content:center;align-items:center;display:flex}@media (min-width:1001px){.sudoku-header-title{display:none}}.sudoku-modern-menu{max-width:1000px;margin:0 auto;padding:1.5rem}@media (max-width:1000px){.sudoku-modern-menu{padding:.5rem}}.sudoku-top-nav{display:none}.secondary-nav-link{color:#475569;background:#f1f5f9;border-radius:99px;align-items:center;gap:.6rem;margin-top:1rem;padding:.6rem 1.2rem;font-size:.95rem;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.secondary-nav-link:hover{color:#1a73e8;background:#e2e8f0;transform:translateY(-1px)}.sudoku-hero-modern{background-color:#fff;background-image:radial-gradient(at 0 0,#1a73e805 0,#0000 50%),radial-gradient(at 100% 100%,#1a73e803 0,#0000 50%);background-position:0 0;background-repeat:repeat;background-size:auto;background-attachment:scroll;background-origin:padding-box;background-clip:border-box;border:1px solid #e2e8f0;border-radius:32px;align-items:center;gap:3rem;margin:1.5rem 0 3rem;padding:2.5rem 3rem;display:flex;position:relative;overflow:hidden;box-shadow:0 25px 50px #0000000d}.hero-content{z-index:1;flex:1;min-width:0}.hero-content h1{-webkit-text-fill-color:transparent;letter-spacing:-2px;background:linear-gradient(135deg,#0f172a 0%,#1e293b 100%);-webkit-background-clip:text;background-clip:text;margin:0;font-size:4rem;font-weight:950;line-height:1}.hero-tagline{color:#475569;margin:1rem 0 .5rem;font-size:1.2rem;font-weight:500}.difficulty-picker-box{margin-top:2rem}.difficulty-picker-box label{color:#94a3b8;text-transform:uppercase;letter-spacing:2px;margin-bottom:1.2rem;font-size:.75rem;font-weight:800;display:block}.modern-difficulty-picker{-webkit-overflow-scrolling:touch;scrollbar-width:none;background:#f1f5f9;border-radius:16px;gap:.2rem;max-width:100%;margin-bottom:1.5rem;padding:.35rem;display:flex;overflow-x:auto}.modern-difficulty-picker::-webkit-scrollbar{display:none}.diff-step-btn{color:#64748b;cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:12px;padding:.6rem 1.1rem;font-size:.85rem;font-weight:700;transition:all .3s cubic-bezier(.4,0,.2,1)}.diff-step-btn:hover{color:#1e293b}.diff-step-btn.active{color:#1a73e8;background:#fff;box-shadow:0 4px 15px #00000014}.difficulty-info-text{color:#64748b;min-height:1.2rem;margin-bottom:2rem;font-size:.95rem}.diff-options{flex-wrap:wrap;gap:.75rem;margin-bottom:2rem;display:flex}.diff-opt-btn{color:#475569;cursor:pointer;background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:.75rem 1.5rem;font-weight:600;transition:all .2s}.diff-opt-btn:hover{background:#f8fafc;border-color:#cbd5e1}.diff-opt-btn.active{color:#fff;background:#1a73e8;border-color:#1a73e8;box-shadow:0 4px 12px #1a73e84d}.hero-action-area{align-items:center;gap:1.5rem;display:flex}.hero-play-btn{color:#fff;cursor:pointer;background:#1a73e8;border:none;border-radius:16px;padding:1.2rem 3.5rem;font-size:1.25rem;font-weight:800;transition:all .3s cubic-bezier(.34,1.56,.64,1);box-shadow:0 12px 24px #1a73e833}.hero-play-btn:hover{background:#1557b0;transform:translateY(-3px);box-shadow:0 15px 30px #1a73e84d}.hero-preview{background:#f8fafc;border-radius:20px;flex-shrink:0;justify-content:center;align-items:center;width:280px;height:280px;display:flex;position:relative;overflow:hidden}.hero-preview:before{content:"";z-index:0;background:radial-gradient(circle,#1a73e80d 0%,#0000 70%);width:140%;height:140%;position:absolute}.preview-container{z-index:1;transition:transform .3s cubic-bezier(.34,1.56,.64,1);position:relative;transform:rotate(-2deg)}.sudoku-hero-modern:hover .preview-container{transform:rotate(0)scale(1.05)}@media (max-width:1000px){.sudoku-hero-modern{text-align:center;border-radius:20px;flex-direction:column;gap:1.5rem;max-width:100%;margin:1rem 0 2rem;padding:1.5rem}.hero-preview{width:100%;height:auto;padding:1rem 0}.hero-action-area{justify-content:center}.hero-play-btn{padding:1rem 3rem;font-size:1.1rem}.diff-options{justify-content:center}.sudoku-hero-modern{border-radius:16px;margin:.5rem 0 1.5rem;padding:1rem}.hero-content h1{font-size:2rem}.hero-tagline{font-size:.95rem}.hero-play-btn{width:100%;padding:.8rem 2.5rem;font-size:1rem}.diff-step-btn{padding:10px 5px;font-size:.8rem}.puzzles-list .archive-card{grid-template-columns:1fr 1fr;gap:10px;display:grid}.puzzles-list .archive-card>:first-child{grid-column:1}.puzzles-list .archive-card>:nth-child(2){grid-area:2/1/auto/-1}.puzzles-list .archive-card>:nth-child(3){grid-column:2}}.archive-modern-list{flex-direction:column;gap:1rem;display:flex}.archive-card{color:inherit;background:#fff;border:1px solid #f1f5f9;border-radius:16px;grid-template-columns:auto 1fr auto;align-items:center;gap:20px;padding:1.25rem 1.5rem;text-decoration:none;transition:all .2s;display:grid;box-shadow:0 1px 3px #0000000d}.archive-card:hover{background:#f8fafc;border-color:#3b82f644;transform:translate(4px);box-shadow:0 10px 15px -3px #0000000d}.archive-diff-icon{background:var(--bg-color,#f1f5f9);width:48px;height:48px;color:var(--text-color,#475569);border-radius:12px;justify-content:center;align-items:center;margin-right:1.5rem;font-weight:800;display:flex}.archive-info h4{color:#1e293b;margin:0;font-size:1.1rem;font-weight:600}.archive-meta{color:#94a3b8;gap:1.5rem;margin-top:.25rem;font-size:.85rem;display:flex}.archive-meta span{align-items:center;gap:.35rem;display:flex}.archive-action-btn{color:#475569;background:#f1f5f9;border-radius:8px;padding:.5rem 1.25rem;font-size:.9rem;font-weight:600;transition:all .2s}.archive-card:hover .archive-action-btn{color:#fff;background:#3b82f6}@media (max-width:1000px){.sidebar-header,.stats-box{display:none}.mode-buttons{flex-direction:column;display:flex}.mode-buttons .mode-icon-btn{width:40px;padding:6px!important}.mode-buttons .mode-icon{width:100%}.number-buttons{width:150px}.game-sudoku main{padding-top:10px}.sudoku-main-area{width:100%}.sudoku-controls{grid-template-columns:48px auto 48px;display:grid}.action-buttons{flex-direction:column;justify-content:flex-start;display:flex}.sudoku-controls{padding-bottom:0}.hints-section label{display:none}.hints-section{position:absolute;bottom:0;right:0}.hints-section .hint-btn{font-size:10px}.hints-section .hint-btn svg{display:none}}