:root{--font-family:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--bg-gradient:linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);--glass-bg:#ffffff0d;--glass-border:#ffffff1a;--glass-shadow:0 4px 30px #00000080;--text-main:#f8fafc;--text-muted:#94a3b8;--accent-color:#8b5cf6;--accent-hover:#7c3aed;--success-color:#10b981}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background:var(--bg-gradient);color:var(--text-main);justify-content:center;align-items:center;min-height:100vh;display:flex;overflow-x:hidden}.app-container{flex-direction:column;align-items:center;gap:2rem;width:100%;max-width:800px;padding:2rem;display:flex}h1{background:linear-gradient(90deg,#c4b5fd,#8b5cf6);-webkit-text-fill-color:transparent;text-shadow:0 2px 10px #8b5cf64d;-webkit-background-clip:text;font-size:2.5rem;font-weight:800}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(16px);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);text-align:center;border-radius:16px;width:100%;padding:2rem}.uploader{cursor:pointer;border:2px dashed #fff3;transition:all .3s}.uploader:hover,.uploader.drag-active{border-color:var(--accent-color);background:#8b5cf61a}.uploader p{color:var(--text-muted);margin-top:1rem}button{background:var(--accent-color);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:background .2s,transform .1s}button:hover{background:var(--accent-hover);transform:translateY(-2px)}button:active{transform:translateY(0)}.settings{flex-direction:column;align-items:center;gap:1rem;display:flex}.settings label{font-size:1.1rem;font-weight:600}.settings input[type=range]{width:200px;accent-color:var(--accent-color)}.puzzle-board{background:#000;border-radius:8px;gap:2px;max-width:100%;margin:0 auto;padding:2px;display:grid;box-shadow:0 10px 30px #000c}.puzzle-piece{cursor:pointer;background:#111;border:1px solid #ffffff0d;justify-content:center;align-items:center;transition:transform .2s ease-in-out;display:flex;position:relative;overflow:hidden}.puzzle-piece img{object-fit:cover;pointer-events:none;width:100%;height:100%;display:block}.puzzle-piece.empty{cursor:default;background:#00000080;border:2px dashed #fff3;position:relative;box-shadow:inset 0 4px 15px #000c}.arrow-hint{color:#fffc;pointer-events:none;text-shadow:0 0 5px #000c;font-size:1.5rem;font-weight:700;position:absolute}.arrow-hint.top{animation:1.5s infinite arrowPulseTop;top:5px;left:50%}.arrow-hint.bottom{animation:1.5s infinite arrowPulseBottom;bottom:5px;left:50%}.arrow-hint.left{animation:1.5s infinite arrowPulseLeft;top:50%;left:5px}.arrow-hint.right{animation:1.5s infinite arrowPulseRight;top:50%;right:5px}@keyframes arrowPulseTop{0%,to{opacity:.2;transform:translate(-50%)scale(.9)}50%{opacity:1;transform:translate(-50%,5px)scale(1.1)}}@keyframes arrowPulseBottom{0%,to{opacity:.2;transform:translate(-50%)scale(.9)}50%{opacity:1;transform:translate(-50%,-5px)scale(1.1)}}@keyframes arrowPulseLeft{0%,to{opacity:.2;transform:translateY(-50%)scale(.9)}50%{opacity:1;transform:translate(5px,-50%)scale(1.1)}}@keyframes arrowPulseRight{0%,to{opacity:.2;transform:translateY(-50%)scale(.9)}50%{opacity:1;transform:translate(-5px,-50%)scale(1.1)}}.win-overlay{z-index:100;background:#000c;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;animation:.5s ease-out forwards fadeIn;display:flex;position:fixed;top:0;left:0}.win-overlay h2{color:var(--success-color);margin-bottom:2rem;font-size:3rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}