:root{--color-text:#17212b;--color-muted:#667482;--color-border:#dbe2e8;--color-bg:#fff;--color-bg-soft:#f7f9fb;--color-primary:#2f6f9f;--radius-sm:6px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--content-width:1120px}*{box-sizing:border-box}body{margin:0;background:var(--color-bg-soft);color:var(--color-text);font-family:system-ui,sans-serif}.site-main{max-width:var(--content-width);margin:0 auto;padding:var(--space-6) var(--space-4)}.sudoku-page{max-width:620px;margin:0 auto}.sudoku-page__intro{color:var(--color-muted);margin-top:0}.sudoku-toolbar,.sudoku-actions{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-3);margin:var(--space-5) 0}.form-field{display:grid;gap:4px;color:var(--color-muted);font-size:.9rem}.form-field__control,.button{border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-bg);font:inherit;padding:.6rem .8rem}.button{cursor:pointer}.button--primary{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.sudoku-timer{margin-left:auto;font-variant-numeric:tabular-nums}.sudoku-board{display:grid;grid-template-columns:repeat(9,1fr);border:3px solid var(--color-text);background:var(--color-bg)}.sudoku-cell{width:100%;aspect-ratio:1;border:1px solid var(--color-border);border-radius:0;text-align:center;color:var(--color-primary);font:inherit;font-size:clamp(1.1rem,6vw,2rem);min-width:0}.sudoku-cell--given{background:#edf1f5;color:var(--color-text);font-weight:700}.sudoku-cell:focus{outline:3px solid var(--color-primary);outline-offset:-3px}.sudoku-cell:nth-child(3n){border-right:2px solid var(--color-text)}.sudoku-cell:nth-child(n+19):nth-child(-n+27),.sudoku-cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid var(--color-text)}.sudoku-status{min-height:1.5rem;color:var(--color-muted)}
@media(min-width:768px){.site-main{padding-top:var(--space-6)}}
.site-main{max-width:1360px}.page-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--space-6)}.page-layout--with-sidebar{grid-template-columns:minmax(0,1fr)}.sudoku-page{width:100%;max-width:620px}@media(min-width:1100px){.page-layout--with-sidebar{grid-template-columns:minmax(0,1fr) 320px}}
.site-header{background:var(--color-bg);border-bottom:1px solid var(--color-border);color:var(--color-text)}.site-header__inner{max-width:1360px;margin:0 auto;min-height:68px;padding:0 var(--space-4);display:flex;align-items:center;gap:var(--space-5)}.site-header__brand{color:var(--color-text);font-size:1.35rem;font-weight:750;letter-spacing:-.03em;text-decoration:none;white-space:nowrap}.site-header__nav{display:flex;align-items:stretch;gap:2px;min-height:68px;flex:1}.site-header__link,.site-header__login{color:var(--color-muted);font-size:.95rem;text-decoration:none;display:flex;align-items:center;padding:var(--space-3) 10px;border:0;background:transparent;font:inherit;white-space:nowrap}.site-header__link:hover,.site-header__login:hover{color:var(--color-text)}.site-header__link--active{color:var(--color-primary);font-weight:700;border-bottom:3px solid var(--color-primary)}.site-header__actions{display:flex;align-items:center;gap:8px}.site-header__language-menu{position:relative;display:inline-flex}.site-header__language-btn{display:inline-flex;align-items:center;gap:8px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:.42rem .75rem;font:inherit;font-size:.875rem;font-weight:500;color:var(--color-muted);cursor:pointer;box-shadow:0 1px 2px rgba(0,0,0,.03);transition:border-color .15s ease,color .15s ease,background-color .15s ease,box-shadow .15s ease}.site-header__language-btn:hover{color:var(--color-text);border-color:#b0c0ce;background-color:var(--color-bg-soft)}.site-header__language-btn:focus,.site-header__language-menu.is-open .site-header__language-btn{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(47,111,159,.18);color:var(--color-text)}.site-header__language-arrow{color:var(--color-muted);transition:transform .2s ease}.site-header__language-menu.is-open .site-header__language-arrow{transform:rotate(180deg)}.site-header__flag{display:inline-flex;align-items:center;flex-shrink:0}.site-header__flag-svg{display:block;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.15)}.site-header__language-dropdown{position:absolute;top:calc(100% + 6px);right:0;z-index:1000;min-width:180px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-sm);box-shadow:0 10px 28px rgba(23,33,43,.12),0 2px 6px rgba(23,33,43,.06);padding:6px;display:none;flex-direction:column;gap:2px}.site-header__language-menu.is-open .site-header__language-dropdown{display:flex}.site-header__language-item{display:flex;align-items:center;gap:10px;padding:.5rem .75rem;border-radius:4px;color:var(--color-text);text-decoration:none;font-size:.875rem;font-weight:450;transition:background-color .15s ease,color .15s ease}.site-header__language-item:hover{background-color:var(--color-bg-soft);color:var(--color-primary)}.site-header__language-item--active{font-weight:600;color:var(--color-primary);background-color:rgba(47,111,159,.06)}.site-header__language-check{margin-left:auto;color:var(--color-primary)}.site-header__login{color:var(--color-primary);font-weight:650}@media(max-width:760px){.site-header__inner{min-height:auto;flex-wrap:wrap;gap:var(--space-2);padding:var(--space-3) var(--space-4)}.site-header__brand{margin-right:auto}.site-header__nav{order:3;flex-basis:100%;min-height:0;overflow-x:auto}.site-header__link{padding:10px 8px;font-size:.9rem}.site-header__link--active{border-bottom-width:2px}.site-header__actions{gap:4px}.site-header__language-btn{font-size:.8rem;padding:.3rem .55rem;gap:6px}.site-header__language-dropdown{min-width:160px;right:0}.site-header__login{font-size:.85rem;padding:6px}}
 .sudoku-cell--selected{background:#dbeaf5}.sudoku-cell--related{background:#f0f5f8}.sudoku-cell--same-value{background:#c5deed}
.sudoku-cell--error{background:#fde2e2;color:#a32626;border-color:#c94c4c}
.daily-highscore{margin-top:var(--space-6);padding-top:var(--space-5);border-top:1px solid var(--color-border)}.daily-highscore h2{font-size:1.15rem}.daily-highscore table{width:100%;border-collapse:collapse}.daily-highscore th,.daily-highscore td{text-align:left;padding:8px;border-bottom:1px solid var(--color-border)}
.sudoku-play-area{display:flex;flex-direction:column;gap:var(--space-4)}.sudoku-number-pad{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.sudoku-number-pad__button{min-height:44px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-bg);color:var(--color-text);font:inherit;font-size:1.1rem;cursor:pointer}.sudoku-number-pad__button:hover{background:var(--color-bg-soft)}.sudoku-number-pad__button--clear{grid-column:span 2;font-size:.9rem}@media(min-width:1100px){.sudoku-play-area{display:grid;grid-template-columns:minmax(0,620px) 150px;align-items:start}.sudoku-number-pad{grid-template-columns:repeat(3,1fr)}}
.sudoku-number-pad{grid-template-columns:repeat(10,minmax(0,1fr))}.sudoku-number-pad__button--clear{grid-column:span 1;font-size:.8rem;padding:4px}@media(min-width:1100px){.sudoku-number-pad{grid-template-columns:repeat(3,1fr)}.sudoku-number-pad__button--clear{grid-column:span 2}}
.stats-bars{display:grid;gap:10px;max-width:620px}.stats-bar{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-left:4px solid var(--color-primary);background:var(--color-bg);border-radius:var(--radius-sm);box-shadow:0 1px 2px rgb(23 33 43 / 8%)}.stats-bar__value{color:var(--color-muted);font-size:.9rem}
.sudoku-page__below-content{max-width:760px;margin:var(--space-8) auto 0;padding-top:var(--space-6);border-top:1px solid var(--color-border)}.sudoku-page__below-content h2{font-size:1.25rem;margin:var(--space-5) 0 var(--space-2)}.sudoku-page__below-content h2:first-child{margin-top:0}.sudoku-page__below-content p{line-height:1.7}
.sudoku-level-links{margin-top:var(--space-7)}.sudoku-level-links h2{margin-bottom:var(--space-3)}.sudoku-level-links{display:flex;flex-wrap:wrap;gap:var(--space-2);align-items:center}.sudoku-level-links h2{width:100%}.sudoku-level-links .button{font-size:.9rem;padding:.55rem .85rem;text-decoration:none}
.site-header__login{display:none!important}