body{background-color:#1a1a1a;color:#eee;font-family:sans-serif;margin:0;display:flex;justify-content:center}.container{padding:20px;max-width:1200px}.header{display:flex;justify-content:space-between;align-items:center}.scoreboard{background:#4caf50;padding:10px 20px;border-radius:8px;font-size:1.5em;font-weight:700}.layout{display:flex;gap:40px;margin-top:20px}.mode-toggle{margin-bottom:20px;display:flex;gap:10px}.mode-toggle button.active{background-color:#2196f3;border:2px solid white}.hex-grid{position:relative;width:500px;height:500px;background:#222;border-radius:50%;border:2px solid #444}.hex{position:absolute;width:40px;height:40px;margin-left:-20px;margin-top:-20px;clip-path:polygon(25% 0%,75% 0%,100% 50%,75% 100%,25% 100%,0% 50%);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.hex.locked{background-color:#333;opacity:.5}.hex.unlocked{background-color:#555;border:1px solid #777}.hex.selected{box-shadow:0 0 0 3px #2196f3;z-index:5}.hex.suggested{background-color:#4caf50!important;transform:scale(1.2);z-index:10;box-shadow:0 0 15px #4caf50}.hex-stack{display:flex;flex-direction:column-reverse}.controls{width:350px;background:#2a2a2a;padding:20px;border-radius:8px;max-height:85vh;overflow-y:auto}.stack-input{margin-bottom:15px;padding-bottom:15px;border-bottom:1px solid #444}.stack-preview{display:flex;flex-direction:column-reverse;margin:5px 0;min-height:30px;background:#111;padding:5px}.color-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin-bottom:5px}.actions{display:flex;flex-direction:column;gap:10px;margin-top:20px}button{cursor:pointer;padding:8px;border:none;border-radius:4px;background:#444;color:#fff}button:hover{background:#555}.solve-btn{background:#2196f3}.apply-btn{background:#4caf50}button:disabled{opacity:.5;cursor:not-allowed}