*{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;min-height:100%}body{background:#000;overflow-x:hidden;font-family:Cormorant Garamond,serif}.page{width:100%;color:#f5f5f5}.scene{position:relative;width:100%;height:100vh;display:flex;flex-direction:column;overflow:hidden;opacity:0;transition:opacity 1.5s ease-out}.scene.ready{opacity:1}.text-area{flex:0 0 45%;display:flex;flex-direction:column;justify-content:center;align-items:center;background:#000;position:relative;z-index:10;gap:1.5rem}.title{font-family:Klee One,cursive;font-weight:600;font-size:clamp(5rem,22vw,18rem);color:#f5f5f5;letter-spacing:.3em;text-indent:.3em;text-shadow:0 0 60px rgba(0,0,0,.8),0 0 120px rgba(0,0,0,.6)}.subtitle{font-family:Cormorant Garamond,serif;font-weight:300;font-size:clamp(1.2rem,3.5vw,2.2rem);color:#f6f6f6;letter-spacing:.5em;text-indent:.5em;text-transform:uppercase}.image-area{flex:1;position:relative;overflow:hidden;background:#000}.bg-image{position:absolute;top:0;right:0;bottom:0;left:0;background-image:url(/twinblades.jpg);background-size:cover;background-position:center;filter:brightness(.5) contrast(1.1)}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(to bottom,#000000e6,#0003 40%,#0003,#000)}.section{padding:1.5rem 8vw;border-top:1px solid rgba(255,255,255,.06);background:#000}.reveal{opacity:0;transform:translateY(20px);transition:opacity 1.6s ease,transform 1.6s ease;visibility:hidden}.reveal.is-visible{opacity:1;transform:translateY(0);visibility:visible}@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}}.section-inner{max-width:820px;margin:0 auto;display:grid;gap:1rem}.section-title{font-family:Klee One,cursive;font-size:clamp(2rem,4vw,3rem);letter-spacing:.08em}.section-label{font-family:Klee One,cursive;font-size:1.4rem;letter-spacing:.08em}.closing{padding-bottom:5rem}.closing-note{font-family:Klee One,cursive;font-size:1.6rem;letter-spacing:.2em;text-align:center;color:#f5f5f5bf}.section-text{font-family:Cormorant Garamond,serif;font-size:1.15rem;line-height:1.9;color:#f5f5f5e0}.math-inline{font-family:Klee One,cursive;font-size:1.1rem;letter-spacing:.08em;margin:0 .35rem;display:inline-block;color:#f1d8b6}.detail-link{font-family:Klee One,cursive;letter-spacing:.08em;text-transform:uppercase;font-size:.95rem;color:#f1d8b6}.detail-link:hover{text-decoration:underline}.detail-page{min-height:100vh;background:#050505;color:#f5f5f5;padding:3.5rem 8vw 5rem}.detail-header{display:grid;gap:1.5rem;margin-bottom:2.5rem}.detail-back{font-family:Klee One,cursive;letter-spacing:.08em;text-transform:uppercase;font-size:.9rem;color:#f5f5f5b3}.detail-eyebrow{font-family:Klee One,cursive;letter-spacing:.18em;text-transform:uppercase;font-size:.85rem;color:#f5f5f599;margin-bottom:.6rem}.detail-title{font-family:Klee One,cursive;font-size:clamp(2.4rem,4.8vw,4rem);letter-spacing:.08em}.detail-subtitle{font-family:Klee One,cursive;font-size:clamp(1.4rem,3vw,2.4rem);letter-spacing:.08em;color:#f5f5f5cc;margin-top:.6rem}.detail-body{display:grid;gap:1.6rem;width:100%}.detail-body>*{min-width:0;width:100%}.detail-body p{font-size:1.1rem;line-height:1.9;color:#f5f5f5e6}.detail-list{display:grid;gap:.6rem;padding-left:1.2rem;font-size:1.05rem}.detail-section{display:grid;gap:1.2rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.08)}.detail-section>*{min-width:0}.detail-section h2{font-family:Klee One,cursive;font-size:1.6rem;letter-spacing:.08em}.detail-images{display:grid;gap:1.2rem;grid-template-columns:repeat(auto-fit,minmax(0,1fr));width:100%;min-width:0}.detail-images figure,.detail-wide{background:#ffffff0d;border-radius:18px;padding:1rem;width:100%;min-width:0}.detail-images figure{min-width:0}.detail-figure{display:flex;flex-direction:column;align-items:center;background:#ffffff0d;border-radius:18px;padding:1rem;gap:.75rem;width:100%}.detail-with-button{display:flex;flex-direction:column;align-items:center;gap:.75rem;width:100%}.detail-figure.anim-frame,.detail-wide.anim-frame,.detail-images figure.anim-frame{background:#050505}.sin2-animation{display:flex;align-items:center;justify-content:center;gap:30px;width:min(100%,900px);max-width:100%;margin:0 auto;padding:1.5rem 1rem .9rem;background:#050505;flex-wrap:nowrap;border-radius:12px}.sin2-value-block{display:flex;flex-direction:column;align-items:flex-start}.sin2-label{font-size:clamp(1.25rem,3vw,2.25rem);font-family:Cormorant Garamond,serif;font-weight:300;color:#f5f5f5b3;margin-bottom:4px}.sin2-sup{font-size:.6em;vertical-align:super}.sin2-value{font-size:clamp(2rem,6vw,5rem);font-family:Cormorant Garamond,serif;font-weight:300;color:#fff;min-width:clamp(70px,22vw,140px);line-height:1;text-align:left}.sin2-rail-container{position:relative;width:clamp(110px,30vw,160px);height:clamp(80px,22vw,120px);display:flex;align-items:center;flex-shrink:0}.sin2-rail{position:absolute;width:100%;height:4px;background-color:#fff;border-radius:2px;top:50%;transform:translateY(-50%)}.sin2-head{position:absolute;display:flex;flex-direction:column;align-items:center;top:50%;transform:translate(-50%,-100%)}.sin2-circle{width:clamp(28px,7vw,40px);height:clamp(28px,7vw,40px);border:3px solid #ffffff;border-radius:50%;background-color:#050505}.sin2-stick{width:3px;height:clamp(30px,9vw,50px);background-color:#fff}.sin2-t{position:absolute;top:clamp(-70px,-10vw,-90px);left:50%;transform:translate(-50%);font-size:clamp(1rem,2.6vw,1.75rem);font-family:Cormorant Garamond,serif;font-weight:300;color:#f5f5f5d9;white-space:nowrap}.spring-animation{display:flex;align-items:center;justify-content:center;gap:1.5rem;width:min(100%,780px);padding:1.5rem 1rem .9rem;background:#050505;flex-wrap:nowrap;border-radius:12px}.spring-value{font-family:Klee One,cursive;font-size:clamp(1.6rem,4vw,2.4rem);letter-spacing:.06em;color:#fff;min-width:clamp(90px,16vw,140px);text-align:center}.spring-system{position:relative;width:clamp(220px,42vw,320px);height:clamp(120px,22vw,160px);display:flex;align-items:center;flex-shrink:0}.spring-wall{position:absolute;width:6px;height:80%;background-color:#f5f5f5;top:10%;border-radius:2px}.spring-wall:before{content:"";position:absolute;top:-5px;width:12px;height:calc(100% + 10px);background:repeating-linear-gradient(-45deg,transparent,transparent 3px,rgba(255,255,255,.5) 3px,rgba(255,255,255,.5) 5px)}.spring-wall-left{left:0}.spring-wall-left:before{right:100%}.spring-wall-right{right:0}.spring-wall-right:before{left:100%}.spring-svg{position:absolute;top:50%;transform:translateY(-50%);height:clamp(30px,6vw,40px);overflow:visible}.spring-left{left:6px}.spring-right{right:6px}.spring-path{stroke:#fff;stroke-width:3px;fill:none}.spring-mass{position:absolute;width:clamp(40px,8vw,60px);height:clamp(40px,8vw,60px);border-radius:50%;background:radial-gradient(circle at 30% 30%,#f5f5f5,#9a9a9a 70%,#5a5a5a);box-shadow:2px 4px 10px #00000059;transform:translate(-50%,-50%);top:50%;left:50%}.douzan-animation{display:flex;align-items:center;justify-content:center;gap:1.25rem;width:min(100%,560px);background:#050505;padding:.75rem .5rem}.douzan-value-block{display:flex;flex-direction:column;align-items:center;gap:.2rem}.douzan-role{font-family:Klee One,cursive;font-size:.85rem;letter-spacing:.2em;text-transform:uppercase;color:#f5f5f5b3}.anim-button{margin-top:.2rem;padding:.4rem 1.4rem;border-radius:999px;border:1px solid rgba(255,255,255,.6);background:#050505;color:#fff;font-family:Klee One,cursive;letter-spacing:.12em;font-size:.8rem;text-transform:uppercase;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;cursor:pointer}.anim-button .anim-label-pause,.anim-button.is-playing .anim-label-play{display:none}.anim-button.is-playing .anim-label-pause{display:inline}.anim-button:focus-visible{outline:2px solid rgba(255,255,255,.8);outline-offset:2px}.douzan-value{font-family:Klee One,cursive;font-size:clamp(1.4rem,3.2vw,2.3rem);letter-spacing:.06em;color:#f5f5f5e6;min-width:3rem;text-align:center}.douzan-rail-container{position:relative;width:clamp(120px,30vw,180px);height:clamp(80px,18vw,100px);display:flex;align-items:center;flex-shrink:0}.douzan-rail{position:absolute;top:50%;width:100%;height:3px;background-color:#fff;border-radius:2px;transform:translateY(-50%)}.douzan-head{position:absolute;top:50%;width:30px;display:flex;flex-direction:column;align-items:center;transform:translate(-50%,-100%)}.douzan-circle{width:20px;height:20px;border:2px solid #ffffff;border-radius:50%;background-color:#050505}.douzan-stick{width:2px;height:30px;background-color:#fff}.detail-wide img,.detail-images img{width:100%;height:auto;border-radius:12px}.math-block{font-family:Klee One,cursive;font-size:1.1rem;letter-spacing:.08em;padding:.9rem 1.2rem;border-radius:14px;background:#ffffff14;display:inline-block}.detail-note{font-family:Klee One,cursive;letter-spacing:.18em;text-transform:uppercase;color:#f5f5f599}@media (max-width: 640px){.overlay{background:linear-gradient(to bottom,#000000f2,#0000004d 45%,#0000008c 75%,#000)}.sin2-animation{gap:.6rem;padding:.9rem .75rem .6rem}.sin2-label{font-size:clamp(1rem,4vw,1.4rem)}.sin2-value{font-size:clamp(1.6rem,7vw,2.4rem);min-width:clamp(60px,18vw,100px)}.sin2-rail-container{width:clamp(90px,24vw,130px);height:clamp(70px,18vw,90px)}.sin2-circle{width:clamp(22px,6vw,30px);height:clamp(22px,6vw,30px)}.sin2-stick{height:clamp(24px,7vw,36px)}.sin2-t{top:clamp(-48px,-12vw,-65px);font-size:clamp(.85rem,3.2vw,1.1rem)}.spring-animation{gap:.75rem;padding:.9rem .75rem .6rem}.spring-value{font-size:clamp(1.2rem,4.5vw,1.8rem);min-width:clamp(60px,16vw,100px)}.spring-system{width:clamp(160px,36vw,240px);height:clamp(90px,20vw,120px)}.spring-mass{width:clamp(32px,7vw,48px);height:clamp(32px,7vw,48px)}}@media (max-width: 768px){.text-area{flex:0 0 40%;gap:1rem}.title{letter-spacing:.2em;text-indent:.2em}.subtitle{letter-spacing:.3em;text-indent:.3em}.section{padding:2.5rem 6vw}.detail-page{padding:2.5rem 6vw 4rem}}