:root{--primary: #ff8a65;--primary-light: #ffbb93;--secondary: #4db6ac;--bg: #fffbf0;--card-bg: rgba(255, 255, 255, .8);--text: #4e342e}*{box-sizing:border-box;margin:0;padding:0;font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,Roboto,sans-serif}body{background:var(--bg);background:linear-gradient(135deg,#fffbf0,#ffe0b2);color:var(--text);min-height:100vh;display:flex;justify-content:center;align-items:center;overflow-x:hidden}#root{width:100%;max-width:600px;padding:20px}.game-container{background:var(--card-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:24px;padding:30px;box-shadow:0 20px 40px #0000001a;text-align:center;border:1px solid rgba(255,255,255,.3)}h1{font-size:2rem;margin-bottom:20px;color:var(--primary);text-shadow:2px 2px 4px rgba(0,0,0,.05)}.difficulty-selector{display:flex;justify-content:center;gap:10px;margin-bottom:30px;flex-wrap:wrap}.btn{padding:8px 16px;border:none;border-radius:12px;background:#fff;color:var(--text);cursor:pointer;transition:all .3s ease;box-shadow:0 4px 6px #0000000d;font-weight:600}.btn:hover{transform:translateY(-2px);box-shadow:0 6px 12px #0000001a}.btn.active{background:var(--primary);color:#fff}.puzzle-board{display:grid;gap:4px;background:#eee;padding:4px;border-radius:12px;position:relative;aspect-ratio:1 / 1;margin:0 auto;max-width:450px}.tile{background-size:450px 450px;background-repeat:no-repeat;cursor:pointer;border-radius:4px;transition:transform .1s ease}.tile:hover{filter:brightness(1.1)}.tile.empty{background:#f5f5f5;cursor:default}.stats{margin:20px 0;display:flex;justify-content:space-around;font-weight:700;font-size:1.1rem}.controls{margin-top:20px;display:flex;gap:10px;justify-content:center}.success-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#000000d9;display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:100;color:#fff}.success-image{max-width:90%;max-height:70%;border-radius:20px;box-shadow:0 0 50px var(--primary);margin-bottom:20px}