:root{color-scheme:light;--accent:#5268a8;--accent-strong:#35477f;--text:#202938;--muted:#667085;--bg:#f5f6f3;--card:#ffffff;--line:#dce1dd}*{box-sizing:border-box}body{margin:0;min-width:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--text);background-color:var(--bg);background-image:linear-gradient(rgba(82,104,168,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(82,104,168,.035) 1px,transparent 1px);background-size:24px 24px;line-height:1.6}.site-header{background:rgba(255,255,255,.88);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.wrap{width:min(900px,100%);min-width:0;margin:0 auto;padding:20px 24px}.site-header .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.brand{color:var(--accent);text-decoration:none;font-weight:700;display:inline-flex;align-items:center;gap:9px;letter-spacing:-.02em}.brand-mark{width:24px;height:24px;object-fit:contain;border-radius:5px}nav.main-nav{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:12px}.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.96);padding:10px;cursor:pointer}.menu-toggle span{display:block;width:100%;height:2px;border-radius:999px;background:var(--text);transition:transform .2s ease,opacity .2s ease}.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}nav a{margin:0;color:var(--text);text-decoration:none;font-weight:600}nav a:hover{color:var(--accent)}nav a:focus-visible,.brand:focus-visible{outline:3px solid rgba(82,104,168,.28);outline-offset:4px;border-radius:4px}.hero{padding:24px 0 12px}.hero h1{margin:0 0 8px;font-size:clamp(2rem,5vw,3rem);letter-spacing:-.045em}.hero p{margin:0;color:var(--muted)}.main>#puzzles>h2{margin-top:26px;font-size:1rem;color:var(--muted);font-weight:600}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px!important}.button-link{display:inline-flex;align-items:center;min-height:40px;padding:8px 13px;color:#fff;background:var(--accent);border:1px solid var(--accent-strong);border-radius:9px;font-weight:700;text-decoration:none}.button-link:hover{background:var(--accent-strong)}.button-link.secondary{color:var(--accent-strong);background:rgba(255,255,255,.7);border-color:#cfd7e7}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 14px 34px rgba(32,41,56,.07)}.card h2,.card h3{margin-top:0}.tip{background:#eef6ff;border-left:4px solid var(--accent);padding:12px 14px;border-radius:8px;margin:16px 0}.example{background:#f9fbfe;border:1px dashed #bad1eb;border-radius:12px;padding:14px;margin:16px 0}ul,ol{padding-left:20px}.back-link{margin-bottom:6px}.back-link a{color:var(--accent);text-decoration:none;font-weight:600}.section-card{background:#fbfdff;border:1px solid #e6eef8;border-radius:12px;padding:16px 18px;margin-top:16px}.section-card h3{margin-bottom:6px}.section-card p{margin-top:0}.article-date{margin:2px 0 18px!important;color:var(--accent-strong)!important;font-size:.78rem;font-weight:700;letter-spacing:.08em;line-height:1.3;text-transform:uppercase}.article-content{color:#4d607b}.article-content p{margin:0 0 14px}.article-content p:last-child{margin-bottom:0}.link-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.link-row a{color:var(--accent);text-decoration:none;font-weight:600}@media (max-width:820px){html{font-size:18px}.wrap{padding:16px 16px}.site-header .wrap{align-items:center}.menu-toggle{display:inline-flex!important;margin-left:auto}nav.main-nav{display:none!important;width:100%;flex-direction:column;align-items:flex-start;padding-top:8px}nav.main-nav.is-open{display:flex!important}}.puzzle-card{overflow-x:auto;background:rgba(255,255,255,.94);border:1px solid #dce1dd;border-radius:18px;padding:clamp(16px,3vw,26px);margin:20px 0;box-shadow:0 14px 32px rgba(32,41,56,.07)}.puzzle-card>h2{margin:0 0 16px;letter-spacing:-.025em}.gr-root{overflow-x:auto;-webkit-overflow-scrolling:touch}.gr-grid{width:auto;min-width:max-content;background:#344057;border-spacing:1px;table-layout:fixed;font-family:Inter,"Segoe UI",Arial,sans-serif;border:5px solid #344057;border-radius:9px;--cell:clamp(34px,7vw,46px);box-shadow:0 12px 28px rgba(32,41,56,.14)}.gr-cell{width:var(--cell);height:var(--cell);background:white;user-select:none;text-align:center;vertical-align:middle;font-size:calc(var(--cell) * .72);font-weight:500;line-height:1;position:relative;box-sizing:border-box}.gr-cell.selected{background:#7cc}.gr-cell.locked{background:#eef;color:#333}.gr-cell.mistake{background:#e88!important}.gr-banner{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.gr-title{display:block;margin-bottom:10px;color:#35477f;font-size:1.05rem}.gr-meta{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px}.gr-meta-item{padding:5px 9px;border:1px solid #dce1dd;border-radius:999px;background:#f8faf7;color:#52606e;font-size:.84rem;line-height:1.25}.gr-meta-item strong{color:#28354c}.gr-status{margin:4px 0 9px;color:#52606e;font-size:.94rem}.gs-button{background-color:#5268a8;border:1px solid #435991;border-radius:8px;margin:0;color:white;padding:8px 13px;text-align:center;text-decoration:none;cursor:pointer}.gr-val{display:inline-block;transition:transform .8s ease;backface-visibility:hidden}.gr-celebrate .gr-val{transform:rotateY(360deg)}.gr-stamps-wrap{margin-top:14px;padding:14px;border:1px solid #dce1dd;border-radius:12px;background:#f8faf7}.gr-stamps-title{margin:0 0 10px;color:#52606e;font-size:.9rem}.gr-toggle-shapes{display:inline-flex;align-items:center;font:inherit;font-weight:700;text-align:left;color:#35477f;padding:4px 0;background:transparent;border:0;margin:16px 0 8px;cursor:pointer}.gr-toggle-shapes:hover{color:#5268a8;text-decoration:underline;text-underline-offset:3px}.gr-stamps{--s:clamp(12px,1.8vw,22px);display:flex;flex-wrap:wrap;gap:20px 28px;align-items:flex-start}.gr-stamp{display:grid;grid-auto-rows:var(--s);grid-auto-columns:var(--s);grid-template-columns:repeat(var(--cols),var(--s));grid-template-rows:repeat(var(--rows),var(--s))}.gr-stamp-cell{width:var(--s);height:var(--s);box-sizing:border-box;background:transparent}@media (max-width:700px){.gr-cell{font-size:calc(var(--cell) * .78)}}.pagination{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:8px;margin:32px 0}.pagination a,.pagination span{min-width:40px;height:40px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;border:1px solid #e3edf7;border-radius:10px;background:#fff;color:var(--text);text-decoration:none;font-weight:600;transition:all .15s ease}@media (max-width:900px){.filters-panel{flex-direction:column;align-items:stretch}.filter-actions{margin-left:0;width:100%}}.contact-form{width:min(100%,640px);display:grid;gap:16px;margin-top:22px}.form-field{display:grid;grid-template-columns:1fr;gap:6px}.form-field label{color:var(--text);font-weight:700}.form-field input,.form-field textarea{display:block;width:100%;min-height:44px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;color:var(--text);background:#fff;font:inherit}.form-field textarea{min-height:160px;resize:vertical}.form-field input:focus,.form-field textarea:focus{outline:3px solid rgba(82,104,168,.2);border-color:var(--accent)}.form-errors{margin:0;color:#a33a3a;font-size:.95rem}.success-message{width:min(100%,640px);background:#edf8ef;border-left:4px solid #3c8a50;padding:12px 14px;border-radius:8px}