*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#e0e5ec;--bg-alt:#d0d9e5;--text:#2c3e4f;--text-light:#5a6f84;--accent:#5c6bc0;--accent-dark:#3f4c9e;--shadow-light:#fff;--shadow-dark:#a3b1c6;--radius:20px;--radius-sm:12px;--transition:all .25s ease}[data-theme=dark]{--bg:#1e2a3a;--bg-alt:#2a384a;--text:#eef3f7;--text-light:#b8cfdc;--accent:#8c9eff;--accent-dark:#5c6bc0;--shadow-light:#2f4055;--shadow-dark:#0f1820}body{background:var(--bg);color:var(--text);-webkit-tap-highlight-color:transparent;font-family:Inter,sans-serif;line-height:1.6;transition:background-color .3s,color .3s;overflow-x:hidden}html{scroll-behavior:smooth;scroll-padding-top:90px}.container{width:100%;max-width:1300px;margin:0 auto;padding:0 2rem}.atmosphere{pointer-events:none;z-index:-2;background:radial-gradient(circle at 20% 30%,#5c6bc014 0%,#0000 30%),radial-gradient(circle at 80% 70%,#5c6bc014 0%,#0000 30%);width:100%;height:100%;position:fixed;top:0;left:0}#heroCanvas{z-index:-1;pointer-events:none;width:100%;height:100%;position:fixed;top:0;left:0}.neu{background:var(--bg);box-shadow:10px 10px 20px var(--shadow-dark), -10px -10px 20px var(--shadow-light);border:none}.neu-card{background:var(--bg);border-radius:var(--radius);box-shadow:8px 8px 16px var(--shadow-dark), -8px -8px 16px var(--shadow-light);transition:var(--transition)}.neu-card:hover{box-shadow:12px 12px 24px var(--shadow-dark), -12px -12px 24px var(--shadow-light)}.neu-btn{background:var(--bg);box-shadow:5px 5px 10px var(--shadow-dark), -5px -5px 10px var(--shadow-light);transition:var(--transition);cursor:pointer;border:none;border-radius:40px}.neu-btn:hover{box-shadow:3px 3px 6px var(--shadow-dark), -3px -3px 6px var(--shadow-light)}.neu-item{background:var(--bg);box-shadow:inset 3px 3px 6px var(--shadow-dark), inset -3px -3px 6px var(--shadow-light);border-radius:40px}.header{z-index:100;background:var(--bg);width:100%;max-width:1300px;box-shadow:8px 8px 16px var(--shadow-dark), -8px -8px 16px var(--shadow-light);border-radius:60px;margin:0 auto;padding:.5rem 2rem;position:sticky;top:1rem;left:0}.header-container{justify-content:space-between;align-items:center;gap:1rem;display:flex}.logo{letter-spacing:.5px;flex-shrink:0;align-items:center;gap:.75rem;font-size:1.4rem;font-weight:700;display:flex}.logo i{color:var(--accent);font-size:1.8rem}.accent{color:var(--accent)}.nav{flex-wrap:wrap;justify-content:center;gap:.5rem;display:flex}.nav-link{color:var(--text);white-space:nowrap;border-radius:30px;align-items:center;min-height:44px;padding:.5rem 1rem;font-size:.95rem;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex;position:relative}.nav-link:hover,.nav-link.active{color:var(--accent);background:var(--bg);box-shadow:inset 3px 3px 6px var(--shadow-dark), inset -3px -3px 6px var(--shadow-light)}.header-actions{flex-shrink:0;align-items:center;gap:.5rem;display:flex}.btn{cursor:pointer;transition:var(--transition);color:var(--text);white-space:nowrap;border:none;border-radius:40px;align-items:center;gap:.5rem;min-height:44px;padding:.6rem 1.4rem;font-family:Inter,sans-serif;font-size:.9rem;font-weight:600;display:inline-flex}.btn-primary{background:var(--accent);color:#fff;box-shadow:5px 5px 10px var(--shadow-dark), -5px -5px 10px var(--shadow-light)}.btn-primary:hover{background:var(--accent-dark);box-shadow:3px 3px 6px var(--shadow-dark), -3px -3px 6px var(--shadow-light)}.btn-outline{background:var(--bg)}.btn-icon{padding:.6rem 1rem;font-size:1.1rem}.btn-large{padding:1rem 2rem;font-size:1.1rem}.mobile-toggle{color:var(--text);cursor:pointer;background:0 0;background:var(--bg);min-width:44px;min-height:44px;box-shadow:3px 3px 6px var(--shadow-dark), -3px -3px 6px var(--shadow-light);border:none;border-radius:50%;justify-content:center;align-items:center;font-size:1.8rem;display:none}.hero{text-align:center;justify-content:center;align-items:center;min-height:100vh;padding-top:100px;display:flex;position:relative;overflow:hidden}.hero-content{z-index:2;width:100%;max-width:900px;margin:0 1rem;padding:2rem;position:relative}.hero-badge{letter-spacing:2px;color:var(--accent);background:var(--bg);box-shadow:inset 3px 3px 6px var(--shadow-dark), inset -3px -3px 6px var(--shadow-light);border-radius:40px;margin-bottom:2rem;padding:.5rem 1.5rem;font-size:.8rem;font-weight:600;animation:.8s ease-out slideDown;display:inline-block}@keyframes slideDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}.hero-title{text-transform:uppercase;letter-spacing:2px;word-break:break-word;margin-bottom:1rem;font-size:clamp(2.8rem,12vw,6rem);font-weight:700;line-height:1.1;animation:1s ease-out fadeIn}.hero-subtitle{color:var(--text-light);min-height:3.5rem;margin-bottom:1.5rem;font-size:1.5rem;font-style:italic;animation:1s ease-out .2s both fadeIn}.hero-description{color:var(--text-light);margin-bottom:2.5rem;font-size:1.2rem;animation:1s ease-out .4s both fadeIn}.hero-actions{flex-wrap:wrap;justify-content:center;gap:1rem;animation:1s ease-out .6s both fadeIn;display:flex}.scroll-indicator{background:linear-gradient(to bottom, var(--accent), transparent);width:2px;height:60px;animation:2s infinite scrollPulse;position:absolute;bottom:2rem;left:50%;transform:translate(-50%)}@keyframes scrollPulse{0%{opacity:.3;transform:translate(-50%)scaleY(.5)}50%{opacity:1;transform:translate(-50%)scaleY(1)}to{opacity:.3;transform:translate(-50%)scaleY(.5)}}.section{z-index:1;padding:4rem 0;position:relative}.alt-bg{background-color:var(--bg-alt)}.section-header{border-left:4px solid var(--accent);margin-bottom:3rem;padding-left:1.5rem;animation:.8s ease-out slideInLeft}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}.section-tag{letter-spacing:3px;color:var(--accent);margin-bottom:.5rem;font-size:.85rem;font-weight:600;display:block}.section-header h2{font-size:clamp(2rem,6vw,3.8rem);font-weight:700;line-height:1.2}.about-grid{grid-template-columns:1fr 1fr;gap:2rem;display:grid}.about-text{padding:2rem}.lead{color:var(--text-light);margin-bottom:2rem;font-size:1.2rem;line-height:1.8}.featured-list{flex-wrap:wrap;gap:1rem;margin-top:2rem;display:flex}.featured-item{white-space:nowrap;align-items:center;gap:.5rem;padding:.5rem 1.2rem;font-size:.9rem;font-weight:600;display:flex}.featured-item i{color:var(--accent)}.about-molecule{justify-content:center;align-items:center;min-height:280px;padding:2rem;display:flex}.tetrahedron{width:180px;height:180px;transform-style:preserve-3d;animation:20s linear infinite spin;position:relative}@keyframes spin{0%{transform:rotateX(0)rotateY(0)}to{transform:rotateX(360deg)rotateY(360deg)}}.atom{transform-style:preserve-3d;border-radius:50%;position:absolute;top:50%;left:50%}.carbon{background:var(--accent);width:36px;height:36px;box-shadow:0 0 20px var(--accent);transform:translate(-50%,-50%)translateZ(0)}.hydrogen{background:var(--text-light);width:24px;height:24px;box-shadow:0 0 15px var(--text-light)}.h1{transform:translate(-50%,-50%)translateZ(60px)}.h2{transform:translate(-50%,-50%)translate3d(56.6px,0,-20px)}.h3{transform:translate(-50%,-50%)translate3d(-28.3px,49px,-20px)}.h4{transform:translate(-50%,-50%)translate3d(-28.3px,-49px,-20px)}.details-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;display:grid}.detail-card{text-align:center;transition:var(--transition);padding:2rem;animation:.6s ease-out both fadeInUp}.detail-card:first-child{animation-delay:.1s}.detail-card:nth-child(2){animation-delay:.2s}.detail-card:nth-child(3){animation-delay:.3s}.detail-card:nth-child(4){animation-delay:.4s}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.detail-card:hover{transform:translateY(-5px)}.detail-icon{color:var(--accent);margin-bottom:1rem;font-size:2.5rem}.detail-card h3{margin-bottom:.5rem;font-size:1.3rem;font-weight:600}.leaders-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;display:grid}.leader-card{text-align:center;transition:var(--transition);padding:2rem;animation:.6s ease-out both fadeInUp}.leader-card:first-child{animation-delay:.1s}.leader-card:nth-child(2){animation-delay:.2s}.leader-card:nth-child(3){animation-delay:.3s}.leader-card:nth-child(4){animation-delay:.4s}.leader-card:hover{transform:translateY(-5px)}.leader-avatar{background:var(--bg);width:90px;height:90px;color:var(--accent);box-shadow:inset 5px 5px 10px var(--shadow-dark), inset -5px -5px 10px var(--shadow-light);transition:var(--transition);border-radius:50%;justify-content:center;align-items:center;margin:0 auto 1.2rem;font-size:2.8rem;display:flex}.leader-card:hover .leader-avatar{box-shadow:inset 3px 3px 6px var(--shadow-dark), inset -3px -3px 6px var(--shadow-light)}.leader-card h3{margin-bottom:.3rem;font-size:1.4rem}.role{color:var(--accent);background:var(--bg);box-shadow:inset 2px 2px 4px var(--shadow-dark), inset -2px -2px 4px var(--shadow-light);border-radius:40px;padding:.3rem 1.2rem;font-size:.9rem;font-weight:600;display:inline-block}.olympiads-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;display:grid}.olympiad-card{text-align:center;transition:var(--transition);padding:2rem;animation:.6s ease-out both fadeInUp}.olympiad-card:first-child{animation-delay:.1s}.olympiad-card:nth-child(2){animation-delay:.2s}.olympiad-card:nth-child(3){animation-delay:.3s}.olympiad-card:nth-child(4){animation-delay:.4s}.olympiad-card:hover{transform:translateY(-5px)}.olympiad-card i{color:var(--accent);margin-bottom:1rem;font-size:2.5rem}.olympiad-card h3{margin-bottom:.3rem;font-size:1.5rem}.olympiad-card p{color:var(--text-light);font-size:.9rem}.footer{border-top:1px solid var(--shadow-dark);border-radius:60px 60px 0 0;margin-top:3rem;padding:3rem 0}.footer-logo{flex-wrap:wrap;align-items:center;gap:.8rem;margin-bottom:1rem;font-size:1.5rem;font-weight:700;display:flex}.footer-logo i{color:var(--accent)}.footer-info{color:var(--text-light);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;display:flex}.developer-credit a{color:var(--accent);border-bottom:1px dotted #0000;text-decoration:none;transition:border-color .2s}.developer-credit a:hover{border-bottom-color:var(--accent)}.notification{background:var(--accent);color:#fff;box-shadow:5px 5px 10px var(--shadow-dark), -5px -5px 10px var(--shadow-light);z-index:999;text-align:center;border-radius:40px;max-width:90vw;padding:1rem 2rem;font-weight:600;transition:transform .4s;position:fixed;bottom:2rem;right:2rem;transform:translate(400px)}.notification.show{transform:translate(0)}@media (pointer:fine){body:not(.touch-device){cursor:none!important}.chem-cursor{pointer-events:none;z-index:99999;opacity:1;mix-blend-mode:difference;width:40px;height:40px;transition:transform .15s,width .2s,height .2s;position:fixed;transform:translate(-50%,-50%)}.chem-cursor:before{content:"⚛️";filter:drop-shadow(0 0 6px var(--accent));font-size:24px;transition:all .2s;animation:3s linear infinite atomSpin;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.chem-cursor:after{content:"";border:2px solid var(--accent);opacity:.4;border-radius:50%;width:50px;height:50px;animation:2s infinite cursorRing;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)scale(.8)}.chem-cursor.hovering:before{content:"🧪";font-size:28px;animation:.8s infinite bubble}.chem-cursor.hovering:after{border-color:var(--accent-dark)}.chem-cursor.clicking{transform:translate(-50%,-50%)scale(.8)}.chem-cursor.clicking:before{content:"💥";font-size:26px;animation:none}.chem-cursor.precision{width:30px;height:30px}.chem-cursor.precision:before{content:"🔬";font-size:18px}.chem-cursor.precision:after{width:35px;height:35px}.cursor-trail{background:var(--accent);pointer-events:none;z-index:99998;opacity:.5;width:8px;height:8px;box-shadow:0 0 10px var(--accent);border-radius:50%;transition:opacity .3s;position:fixed;transform:translate(-50%,-50%)}}@media (pointer:coarse){.chem-cursor,.cursor-trail{display:none!important}}@keyframes atomSpin{0%{transform:translate(-50%,-50%)rotate(0)}to{transform:translate(-50%,-50%)rotate(360deg)}}@keyframes cursorRing{0%{opacity:.5;transform:translate(-50%,-50%)scale(.8)}50%{opacity:.2;transform:translate(-50%,-50%)scale(1.2)}to{opacity:0;transform:translate(-50%,-50%)scale(1.5)}}@keyframes bubble{0%,to{opacity:1;transform:translate(-50%,-50%)scale(1)}50%{opacity:.8;transform:translate(-50%,-50%)scale(1.2)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media (width<=1024px) and (width>=768px){.details-grid,.leaders-grid,.olympiads-grid{grid-template-columns:repeat(2,1fr)}.hero-title{font-size:clamp(3.5rem,9vw,5rem)}.about-molecule{min-height:240px}.tetrahedron{width:160px;height:160px}}@media (width<=900px){.nav{display:none}.mobile-toggle{display:flex}.nav.active{background:var(--bg);box-shadow:8px 8px 16px var(--shadow-dark), -8px -8px 16px var(--shadow-light);z-index:99;border-radius:30px;flex-direction:column;gap:.8rem;margin-top:.5rem;padding:1.5rem;display:flex;position:absolute;top:100%;left:0;right:0}.nav.active .nav-link{white-space:normal;text-align:center;justify-content:center;width:100%;padding:.8rem}.about-grid{grid-template-columns:1fr;gap:2rem}.footer-info{flex-direction:column;align-items:flex-start}.header{padding:.5rem 1.5rem}.header-container{flex-wrap:wrap}.hero-content{padding:1.5rem}}@media (width<=600px){.container{padding:0 1.2rem}.hero-title{font-size:clamp(2.4rem,10vw,3.8rem)}.hero-subtitle{min-height:3rem;font-size:1.3rem}.hero-description{font-size:1rem}.hero-actions{flex-direction:column;align-items:stretch;gap:.8rem}.btn-large{justify-content:center;width:100%}.section-header h2{font-size:1.8rem}.details-grid,.leaders-grid,.olympiads-grid{grid-template-columns:1fr;gap:1.5rem}.about-text,.about-molecule{padding:1.5rem}.tetrahedron{width:140px;height:140px}.carbon{width:30px;height:30px}.hydrogen{width:20px;height:20px}.h1{transform:translate(-50%,-50%)translateZ(50px)}.h2{transform:translate(-50%,-50%)translate3d(47.1px,0,-16.7px)}.h3{transform:translate(-50%,-50%)translate3d(-23.6px,40.8px,-16.7px)}.h4{transform:translate(-50%,-50%)translate3d(-23.6px,-40.8px,-16.7px)}.footer-logo{font-size:1.2rem}.footer-info{font-size:.9rem}.notification{bottom:1rem;left:1rem;right:1rem;transform:translateY(200%)}.notification.show{transform:translateY(0)}}@media (width<=380px){.logo{font-size:1.2rem}.logo i{font-size:1.5rem}.hero-badge{padding:.4rem 1rem;font-size:.7rem}.featured-item{padding:.4rem 1rem;font-size:.8rem}}@media (orientation:landscape) and (height<=600px){.hero{min-height:120vh;padding-top:120px}.hero-title{font-size:clamp(2.2rem,8vw,3.5rem)}.hero-subtitle{min-height:2.5rem;margin:.5rem 0}.scroll-indicator{height:40px}}