*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{background:linear-gradient(135deg,#ff9a9e 0%,#fecfef 50% 100%);min-height:100vh;padding:20px;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}a.logo{color:inherit;text-decoration:none}.content-section a{color:#1565c0;font-weight:600}.content-section a:hover{text-decoration:underline}.faq-list h3{margin-top:20px;margin-bottom:8px}.faq-list p{margin-bottom:8px}.container{text-align:center;touch-action:manipulation;width:100%;max-width:600px;margin:0 auto}.header{justify-content:space-between;align-items:center;max-width:800px;margin:0 auto 50px;padding:0 20px;display:flex}.logo{color:#333;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;font-size:1.8rem;font-weight:700}.header-right{align-items:center;gap:10px;display:flex}.header-nav-link{color:#333;white-space:nowrap;padding:8px 10px;font-size:.9rem;font-weight:600;text-decoration:none}.header-nav-link:hover{text-decoration:underline}.header-btn{border-radius:8px;min-width:100px;height:auto;padding:8px 16px;font-size:.9rem}.dropdown{display:inline-block;position:relative}.dropdown-btn{color:#fff;background:#42a5f5;justify-content:center;align-items:center;gap:6px;display:flex}.dropdown-btn:hover{background:#2196f3}.dropdown-arrow{font-size:.7rem;transition:transform .3s;display:inline-block}.dropdown.active .dropdown-arrow{transform:rotate(180deg)}.dropdown-content{z-index:1000;background-color:#fff;border:1px solid #e0e0e0;border-radius:8px;min-width:200px;margin-top:8px;animation:.2s slideDown;display:none;position:absolute;right:0;overflow:hidden;box-shadow:0 8px 16px #0003}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.dropdown.active .dropdown-content{display:block}.dropdown-content a{color:#333;border-bottom:1px solid #f0f0f0;padding:12px 16px;font-size:.9rem;text-decoration:none;transition:background-color .2s;display:block}.dropdown-content a:last-child{border-bottom:none}.dropdown-content a:hover{background-color:#f5f5f5}.game-board{--size:300px;--node:50px;--edge:2.5px;--spread:28%;width:var(--size);height:var(--size);border:var(--edge) solid #333;background:#fecfef4d;border-radius:10px;justify-content:center;align-items:center;margin:0 auto 50px;display:flex;position:relative;box-shadow:0 8px 25px #0000001a}.letter-node{width:var(--node);height:var(--node);color:#333;cursor:pointer;z-index:1;-webkit-tap-highlight-color:transparent;touch-action:manipulation;background:#fff;border:2px solid #333;border-radius:50%;justify-content:center;align-items:center;padding:0;font-family:inherit;font-size:1.5rem;font-weight:700;transition:transform .2s,box-shadow .2s,background .2s,color .2s;display:flex;position:absolute}.letter-node:disabled{cursor:default}.game-board--loading{justify-content:center;align-items:center;display:flex}.loading-label{color:#555;font-weight:600}.message.win{color:#1b5e20;font-size:1.05rem}.letter-node:hover{transform:scale(1.08);box-shadow:0 6px 16px #0000002e}.letter-node.available{color:#fff;background:#17a2b8;border-color:#117a8b}.letter-node.used{color:#fff;background:#28a745;border-color:#1e7e34}.letter-node.selected,.letter-node.used.selected{color:#fff;background:#007bff;border-color:#0056b3}@keyframes shake{0%,to{transform:translate(0)scale(1)}10%,30%,50%,70%,90%{background:#ffc107;border-color:#ff9800;transform:translate(-3px)scale(1.1)}20%,40%,60%,80%{background:#ffc107;border-color:#ff9800;transform:translate(3px)scale(1.1)}}.letter-node.shake,.word-tag.shake{animation:.6s ease-in-out shake}@keyframes pulse{0%,to{background:#ffc107;border-color:#ff9800;transform:scale(1)}50%{background:#ff9800;border-color:#ff6f00;transform:scale(1.2)}}.letter-node.pulse{animation:.8s ease-in-out 2 pulse}.top-left{top:calc(var(--node)/-2);left:calc(50% - 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