[hidden],.modal-overlay[hidden],.modal-backdrop[hidden],.canvas-overlay[hidden]{display:none!important}:root{--bg-main:#0e0f14;--bg-surface:#181922;--bg-board:silver;--border-light:#fff;--border-dark:gray;--border-color:#ffffff1a;--text-main:#f4f4f5;--text-muted:#a1a1aa;--accent-red:#ef4444;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{background-color:var(--bg-main);color:var(--text-main);font-family:var(--font-family);flex-direction:column;min-height:100vh;line-height:1.5;display:flex;overflow-x:hidden}#app{flex-direction:column;min-height:100vh;display:flex}.site-header{background:var(--bg-surface);border-bottom:1px solid var(--border-color);z-index:50;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:10px 16px;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;max-width:900px;margin:0 auto;display:flex}.brand{align-items:center;gap:10px;display:flex}.brand-icon{font-size:1.8rem}.brand-title{letter-spacing:-.5px;background:linear-gradient(135deg,#f87171 0%,#ef4444 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.15rem;font-weight:800}.brand-badge{color:#f87171;letter-spacing:.5px;background:#ef444426;border-radius:4px;padding:2px 6px;font-size:.65rem;font-weight:700}.header-actions{align-items:center;gap:8px;display:flex}.icon-btn{border:1px solid var(--border-color);color:var(--text-main);cursor:pointer;background:#ffffff0f;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;transition:all .2s;display:flex}.icon-btn:hover{background:#ffffff1f;transform:translateY(-1px)}.main-content{flex-direction:column;flex:1;align-items:center;padding:14px 16px 36px;display:flex}.game-container{flex-direction:column;align-items:center;gap:12px;width:100%;max-width:760px;display:flex}.difficulty-selector{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-sm);gap:3px;padding:3px;display:flex}.diff-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:6px 14px;font-size:.82rem;font-weight:600;transition:all .15s}.diff-btn.active{color:#fff;background:#ffffff1f}.minesweeper-window{-webkit-user-select:none;user-select:none;background:silver;border:3px solid gray;border-color:#fff gray gray #fff;max-width:100%;padding:6px;overflow-x:auto;box-shadow:0 16px 36px #000000b3}.window-header{background:silver;border:3px solid #fff;border-color:gray #fff #fff gray;justify-content:space-between;align-items:center;margin-bottom:6px;padding:6px 10px;display:flex}.led-display{color:#ef4444;font-family:var(--font-mono);letter-spacing:2px;text-shadow:0 0 6px #ef444499;text-align:right;background:#000;border:1px solid gray;min-width:65px;padding:2px 8px;font-size:1.6rem;font-weight:900;line-height:1.1}.smiley-btn{cursor:pointer;background:silver;border:2px solid gray;border-color:#fff gray gray #fff;outline:none;justify-content:center;align-items:center;width:38px;height:38px;font-size:1.5rem;display:flex}.smiley-btn:active{border-color:gray #fff #fff gray}.grid-container{background:#7b7b7b;border:3px solid #fff;border-color:gray #fff #fff gray;display:inline-block;overflow:hidden}.minesweeper-grid{gap:0;display:grid}.mine-cell{width:30px;height:30px;font-family:var(--font-mono);cursor:pointer;box-sizing:border-box;background:silver;border:2.5px solid gray;border-color:#fff gray gray #fff;justify-content:center;align-items:center;font-size:1.1rem;font-weight:900;display:flex}.mine-cell:active:not(.revealed){background:#bdbdbd;border-color:gray}.mine-cell.revealed{cursor:default;background:silver;border:1px solid #7b7b7b}.mine-cell.exploded{background:#ef4444!important}.mine-cell[data-num="1"]{color:#00f}.mine-cell[data-num="2"]{color:green}.mine-cell[data-num="3"]{color:red}.mine-cell[data-num="4"]{color:navy}.mine-cell[data-num="5"]{color:maroon}.mine-cell[data-num="6"]{color:teal}.mine-cell[data-num="7"]{color:#000}.mine-cell[data-num="8"]{color:gray}.mobile-controls{align-items:center;gap:10px;margin-top:6px;display:flex}.tool-toggle-btn{background:var(--bg-surface);border:1px solid var(--border-color);color:var(--text-main);font-family:var(--font-family);border-radius:var(--radius-sm);cursor:pointer;align-items:center;gap:6px;padding:8px 16px;font-size:.85rem;font-weight:600;transition:all .2s;display:inline-flex}.tool-toggle-btn.active{color:#f87171;background:#ef444433;border-color:#ef4444}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;background:#000000bf;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal-card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);text-align:center;width:100%;max-width:420px;padding:26px 24px;box-shadow:0 20px 45px #000000d9}.modal-icon{margin-bottom:8px;font-size:3rem}.modal-title{color:#fff;margin-bottom:8px;font-size:1.4rem;font-weight:800}.modal-desc{color:var(--text-muted);margin-bottom:20px;font-size:.9rem;line-height:1.5}.btn{border:1px solid var(--border-color);color:var(--text-main);font-family:var(--font-family);border-radius:var(--radius-sm);cursor:pointer;background:#ffffff14;padding:8px 16px;font-size:.85rem;font-weight:600;transition:all .2s}.btn.primary{color:#fff;background:linear-gradient(135deg,#dc2626 0%,#b91c1c 100%);border-color:#dc2626;font-weight:700}.seo-section{width:100%;max-width:860px;margin:36px auto 0;padding:0 16px}.seo-card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);margin-bottom:24px;padding:28px 24px}.seo-card h1{color:#fff;margin-bottom:14px;font-size:1.6rem;font-weight:800}.seo-card h2{color:#fff;align-items:center;gap:8px;margin:22px 0 12px;font-size:1.3rem;font-weight:800;display:flex}.seo-card p,.seo-card li{color:#d4d4d8;margin-bottom:12px;font-size:.92rem;line-height:1.68}.seo-card ul{margin-bottom:14px;padding-left:20px}.faq-list details{border:1px solid var(--border-color);border-radius:var(--radius-md);background:#ffffff05;margin-bottom:10px;padding:12px 16px}.faq-list summary{color:#fff;cursor:pointer;justify-content:space-between;align-items:center;font-size:.95rem;font-weight:700;list-style:none;display:flex}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";color:#f87171;font-size:1.2rem}.faq-list details[open] summary:after{content:"−"}.faq-list details[open] p{margin-top:10px;margin-bottom:0}.site-footer{border-top:1px solid var(--border-color);background:#08090d;margin-top:auto;padding:32px 16px}.footer-inner{max-width:900px;margin:0 auto}.matrix-title{text-transform:uppercase;letter-spacing:1px;color:#f87171;margin-bottom:12px;font-size:.88rem;font-weight:800}.matrix-grid{flex-wrap:wrap;gap:10px;margin-bottom:24px;display:flex}.matrix-link{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-main);align-items:center;gap:6px;padding:8px 14px;font-size:.82rem;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.matrix-link:hover{background:#ffffff1a;border-color:#ef4444;transform:translateY(-1px)}.matrix-link.current{color:#fca5a5;pointer-events:none;background:#ef444426;border-color:#ef4444}.footer-copy{color:var(--text-muted);text-align:center;font-size:.78rem}