/* 스프링 곡선 — 애플 파라미터(응답·감쇠비)를 CSS linear() 로 (apple-design 스킬 §4). 임계 감쇠 = 튐 없음 · 0.8 = 살짝 튐 */
:root{ --spring:linear(0.0 0.0%, 0.0302 2.08%, 0.0905 4.17%, 0.1667 6.25%, 0.2494 8.33%, 0.3326 10.42%, 0.4125 12.5%, 0.4869 14.58%, 0.5328 16.67%, 0.596 18.75%, 0.6523 20.83%, 0.7018 22.92%, 0.7451 25.0%, 0.7827 27.08%, 0.8152 29.17%, 0.8431 31.25%, 0.8595 33.33%, 0.881 35.42%, 0.8994 37.5%, 0.915 39.58%, 0.9283 41.67%, 0.9395 43.75%, 0.949 45.83%, 0.9571 47.92%, 0.9617 50.0%, 0.9678 52.08%, 0.9729 54.17%, 0.9772 56.25%, 0.9809 58.33%, 0.9839 60.42%, 0.9865 62.5%, 0.9887 64.58%, 0.9899 66.67%, 0.9915 68.75%, 0.9929 70.83%, 0.994 72.92%, 0.995 75.0%, 0.9958 77.08%, 0.9965 79.17%, 0.997 81.25%, 0.9974 83.33%, 0.9978 85.42%, 0.9981 87.5%, 0.9984 89.58%, 0.9987 91.67%, 0.9989 93.75%, 0.9991 95.83%, 0.9992 97.92%, 1 100.0%); --spring-t:0.575s; --bounce:linear(0.0 0.0%, 0.0413 2.08%, 0.0934 4.17%, 0.1575 6.25%, 0.2289 8.33%, 0.341 10.42%, 0.4152 12.5%, 0.4867 14.58%, 0.5541 16.67%, 0.6459 18.75%, 0.7002 20.83%, 0.7489 22.92%, 0.7921 25.0%, 0.8299 27.08%, 0.8773 29.17%, 0.9033 31.25%, 0.9253 33.33%, 0.9437 35.42%, 0.9654 37.5%, 0.9766 39.58%, 0.9855 41.67%, 0.9925 43.75%, 1.0001 45.83%, 1.0036 47.92%, 1.0061 50.0%, 1.0077 52.08%, 1.0087 54.17%, 1.0093 56.25%, 1.0093 58.33%, 1.009 60.42%, 1.0085 62.5%, 1.0076 64.58%, 1.0069 66.67%, 1.0062 68.75%, 1.0055 70.83%, 1.0045 72.92%, 1.0039 75.0%, 1.0033 77.08%, 1.0028 79.17%, 1.0024 81.25%, 1.0018 83.33%, 1.0015 85.42%, 1.0012 87.5%, 1.0009 89.58%, 1.0006 91.67%, 1.0005 93.75%, 1.0003 95.83%, 1.0002 97.92%, 1 100.0%); --bounce-t:0.446s; }