:root{--bg-color:#1a1a2e;--text-color:#fff;--primary-color:#e94560;--accent-color:#0f3460;--green-pop:#0f8;--yellow-pop:#ffe600;--danger-color:#f36;--glass-bg:#ffffff1a}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);background-image:radial-gradient(circle at 50% 0,#2a2a4e 0%,#1a1a2e 70%);justify-content:center;align-items:center;width:100vw;height:100vh;font-family:Inter,"M PLUS Rounded 1c",sans-serif;display:flex;overflow:hidden}#app{background:#0003;border-left:2px solid #ffffff0d;border-right:2px solid #ffffff0d;flex-direction:column;width:100%;max-width:800px;height:100vh;max-height:900px;display:flex;position:relative;box-shadow:0 0 50px #00000080}.screen{z-index:10;background:var(--bg-color);flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;transition:opacity .3s;display:flex;position:absolute;top:0;left:0}.screen.hidden{opacity:0;pointer-events:none;z-index:-1}.screen.active{opacity:1;pointer-events:all;z-index:10}#game-ui{z-index:1;background:0 0;justify-content:space-between}h1{text-transform:uppercase;letter-spacing:2px;text-shadow:0 0 10px var(--primary-color), 0 0 20px var(--primary-color);margin-bottom:1rem;font-size:3rem;font-weight:900;animation:2s infinite alternate pulseText}@keyframes pulseText{0%{text-shadow:0 0 10px var(--primary-color);transform:scale(1)}to{text-shadow:0 0 20px var(--primary-color), 0 0 30px #ff7b93;transform:scale(1.05)}}p{color:#ccc;margin-bottom:2rem;font-size:1.2rem}.difficulty-select{flex-direction:column;gap:1rem;width:80%;max-width:400px;display:flex}.btn{cursor:pointer;text-shadow:1px 1px 2px #00000080;border:none;border-radius:12px;padding:1rem 2rem;font-size:1.2rem;font-weight:700;transition:all .2s cubic-bezier(.175,.885,.32,1.275)}.btn:hover{transform:translateY(-5px)scale(1.02);box-shadow:0 10px 20px #0000004d}.btn:active{transform:translateY(2px)}.btn-beginner{color:#fff;background:linear-gradient(135deg,#00b4db,#0083b0)}.btn-intermediate{color:#fff;background:linear-gradient(135deg,#11998e,#38ef7d)}.btn-advanced{color:#fff;background:linear-gradient(135deg,#cb2d3e,#ef473a)}.header{background:linear-gradient(#000c,#0000);justify-content:space-between;width:100%;padding:1rem 2rem;font-size:1.5rem;font-weight:700;display:flex}#health{color:var(--danger-color)}#score{color:var(--yellow-pop)}#game-area{flex-grow:1;width:100%;position:relative;overflow:hidden}#base-line{background-color:var(--danger-color);width:100%;height:5px;box-shadow:0 0 15px var(--danger-color);z-index:2;position:absolute;bottom:0}.zombie{z-index:3;flex-direction:column;align-items:center;transition:top .1s linear;display:flex;position:absolute}.zombie-icon{filter:drop-shadow(0 5px 10px #00000080);margin-bottom:-10px;font-size:3rem;animation:1s ease-in-out infinite alternate wobble}@keyframes wobble{0%{transform:rotate(-5deg)translateY(0)}to{transform:rotate(5deg)translateY(-5px)}}.zombie-word{background:var(--glass-bg);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);text-align:center;border:1px solid #fff3;border-radius:8px;padding:8px 12px;box-shadow:0 4px 6px #0000004d}.zombie-japanese{color:#ddd;margin-bottom:4px;font-size:1rem}.zombie-romaji{letter-spacing:2px;font-size:1.2rem;font-weight:700}.typed{color:var(--green-pop);text-shadow:0 0 5px var(--green-pop)}.untyped{color:#fff}.zombie.targeted .zombie-word{border-color:var(--yellow-pop);box-shadow:0 0 15px #ffe60080}.zombie.targeted .zombie-icon{filter:drop-shadow(0 0 10px var(--yellow-pop))}.zombie.dying{animation:.3s forwards popOut}@keyframes popOut{0%{opacity:1;transform:scale(1)}50%{opacity:.8;transform:scale(1.4)}to{opacity:0;transform:scale(0)}}.footer{justify-content:center;width:100%;padding:1rem;display:flex}.glass-panel{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);text-align:center;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:12px;min-width:300px;padding:1rem 2rem}.hint{color:#aaa;margin-bottom:5px;font-size:.9rem}#rock-on-text{color:var(--yellow-pop);letter-spacing:3px;font-size:1.5rem;font-weight:700}