*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:#011621;background-color:#f4f7f8;font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit}:root{--bg-light:#e7f0ef;--bg-white:#f8fbfb;--text-dark:#011621;--text-muted:#31515c;--nav-dark:#243740;--nav-darker:#1a2a31;--primary:#1e8c79;--primary-dark:#0f6d66;--secondary:#022e49;--accent-red:#c10532;--accent-pink:#d94b8a}.nav-item{align-items:center;display:flex;position:relative}.nav-link-btn{color:#ffffffeb;cursor:pointer;background:0 0;border:none;padding:0 0 6px;font-family:inherit;font-size:1.05rem;font-weight:700;transition:color .2s;position:relative}.nav-link-btn:hover{color:#1d6265}.nav-link-btn:after{content:"";background-color:#1e8c79;width:0;height:2px;transition:width .2s;position:absolute;bottom:-4px;left:0}.dropdown:hover .nav-link-btn:after{width:100%}.nav-caret{opacity:.8;margin-left:6px;font-size:.8rem}.dropdown-menu{opacity:0;visibility:hidden;z-index:1200;background:linear-gradient(#243740 0%,#1a2a31 100%);border:1px solid #ffffff14;border-radius:12px;flex-direction:column;gap:4px;min-width:220px;padding:8px;transition:opacity .2s,transform .2s,visibility .2s;display:flex;position:absolute;top:calc(100% + 6px);left:50%;transform:translate(-50%)translateY(8px);box-shadow:0 14px 30px #00000047}.dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translate(-50%)translateY(0)}.dropdown{margin-bottom:-10px;padding-bottom:10px}.dropdown-menu button{text-align:left;cursor:pointer;color:#ffffffe6;background:0 0;border:none;border-radius:8px;padding:10px 12px;font-family:inherit;font-size:.96rem;transition:background-color .2s,color .2s}.dropdown-menu button:hover{color:#fff;background:#1e8c7929}.navbar{z-index:1000;background:linear-gradient(90deg,#21343d 0%,#16262d 55%,#0d1a20 100%);padding:14px 40px;position:sticky;top:0;box-shadow:0 6px 18px #00000038}.navbar-container{justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;display:flex}.navbar-logo{filter:drop-shadow(0 0 6px #ffffff83);width:auto;height:64px;display:block}.navbar-links{gap:36px;display:flex}.navbar-links a{color:#ffffffeb;padding-bottom:6px;font-size:1.05rem;font-weight:700;text-decoration:none;transition:color .2s;position:relative}.navbar-links a:hover{color:#1d6265}.navbar-links a:after{content:"";background-color:#1e8c79;width:0;height:2px;transition:width .2s;position:absolute;bottom:-4px;left:0}.navbar-links a:hover:after{width:100%}.hero{background:linear-gradient(#dfe9e8 0%,#cfdddc 100%);padding:110px 20px}.hero-container{grid-template-columns:1fr 1.1fr;align-items:center;gap:56px;max-width:1200px;margin:0 auto;display:grid}.hero-visual{justify-content:center;align-items:center;display:flex}.hero-mascot{width:100%;max-width:340px;height:auto;display:block}.hero-content{text-align:left}.hero-subtitle{color:var(--text-muted);margin-bottom:18px;font-size:24px}.hero h1{color:var(--text-dark);letter-spacing:1px;margin-bottom:18px;font-size:68px;line-height:1}.hero-date-wrap{margin-bottom:34px}.hero-date-label{text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:12px;font-size:15px}.hero-date-machine{background:#ffffff94;border-radius:20px;align-items:center;gap:10px;min-height:100px;padding:14px 18px;display:inline-flex;box-shadow:0 10px 24px #0000000f}.date-window{background:#ffffffbf;border-radius:14px;width:86px;height:72px;position:relative;overflow:hidden}.date-window-day{width:132px}.date-window-static{width:124px}.date-strip{will-change:transform;flex-direction:column;transition:transform .42s cubic-bezier(.22,1,.36,1);display:flex}.date-strip-slower{transition-duration:.65s}.date-value{height:72px;color:var(--text-dark);white-space:nowrap;justify-content:center;align-items:center;font-size:34px;font-weight:800;display:flex}.date-value-static{height:72px}.date-value-final{color:#ac4365}.date-separator{color:var(--text-dark);font-size:34px;font-weight:800;line-height:1;transform:translateY(-2px)}.hero-button{background:linear-gradient(135deg, var(--primary-dark), var(--primary));color:#fff;cursor:pointer;border:none;border-radius:10px;padding:14px 30px;font-weight:700;text-decoration:none;transition:all .2s;display:inline-block;box-shadow:0 8px 20px #1e8c7940}.hero-button:hover{transform:translateY(-2px);box-shadow:0 12px 24px #1e8c7959}@media (width<=980px){.hero{padding:80px 20px}.hero-container{text-align:center;grid-template-columns:1fr;gap:32px}.hero-visual{order:1}.hero-content{text-align:center;order:2}.hero-mascot{max-width:220px}.hero h1{font-size:52px}.hero-subtitle{font-size:21px}.hero-date-machine{justify-content:center}}@media (width<=640px){.hero h1{font-size:40px}.hero-subtitle{font-size:18px}.hero-date-machine{gap:8px;min-height:86px;padding:12px 14px}.date-window{width:68px;height:58px}.date-window-day{width:108px}.date-window-static{width:100px}.date-value,.date-value-static{height:58px;font-size:26px}.date-separator{font-size:26px}}.about h2,.program h2,.register h2,.contact h2{color:var(--text-dark);margin-bottom:22px;font-size:42px;display:inline-block;position:relative}.about h2:after,.program h2:after,.register h2:after,.contact h2:after{content:"";background:linear-gradient(90deg, var(--primary), var(--accent-pink));border-radius:999px;width:70px;height:4px;margin:12px auto 0;display:block}.about p,.program p,.register p,.contact p{color:var(--text-muted);font-size:20px;line-height:1.8}.program{background-color:#e8f1f0;padding:90px 20px}.program-container{text-align:center;max-width:1400px;margin:0 auto;position:relative}.register{background-color:#e8f1f0;padding:90px 20px}.register p{margin-bottom:30px}.register-link{background:linear-gradient(135deg, var(--secondary), var(--primary-dark));color:#fff;border-radius:10px;padding:14px 28px;font-weight:700;transition:all .2s;display:inline-block;box-shadow:0 8px 20px #022e492e}.register-link:hover{transform:translateY(-2px);box-shadow:0 12px 24px #022e4947}.contact{background-color:#f5f7f7;padding:90px 20px}.contact-container{text-align:center;max-width:900px;margin:0 auto}.footer{background:linear-gradient(90deg, var(--nav-dark) 30%, var(--nav-darker) 100%);color:#fff;text-align:center;margin-top:0;padding:34px 20px}.sponsors-section{text-align:center;background:#f5f7f7;padding:100px 20px}.sponsors-section h2{color:#011f2e;margin-bottom:10px;font-size:3rem}.section-underline{background:linear-gradient(90deg,#168c84,#d14d8b);border-radius:999px;width:80px;height:4px;margin:0 auto 30px}.sponsors-description{color:#274b63;max-width:700px;margin:0 auto 50px;font-size:1.3rem;line-height:1.6}.sponsors-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:30px;max-width:900px;margin:0 auto;display:grid}.sponsor-card{color:#7a8f9b;background:#fff;border-radius:16px;justify-content:center;align-items:center;height:100px;font-weight:500;transition:transform .2s;display:flex;box-shadow:0 6px 20px #011f2e14}.sponsor-card:hover{transform:translateY(-4px)}.cube-carousel{justify-content:center;align-items:center;gap:32px;width:100%;max-width:100%;margin:0 auto;display:flex;position:relative}.cube-scene{perspective:1800px;z-index:1;justify-content:center;align-items:center;width:100%;max-width:1200px;height:520px;display:flex;position:relative}.cube{width:100%;max-width:100%;height:520px;transform-style:preserve-3d;transition:transform .9s;position:relative}.cube-face{width:100%;max-width:1200px;height:520px;box-shadow:none;box-sizing:border-box;text-align:center;backface-visibility:hidden;background:#f7f9f9;border-radius:0;flex-direction:column;justify-content:center;align-items:center;padding:60px 80px;display:flex;position:absolute}.cube-face h2{color:var(--text-dark);margin-bottom:18px;font-size:5rem}.cube-face p{color:var(--text-muted);max-width:900px;margin-top:28px;font-size:2rem;line-height:1.8}.cube-front{transform:rotateY(0)translateZ(600px)}.cube-right{transform:rotateY(90deg)translateZ(600px)}.cube-back{transform:rotateY(180deg)translateZ(600px)}.cube-left{transform:rotateY(-90deg)translateZ(600px)}.program-face{background:linear-gradient(#eef5f4 0%,#e3efed 100%);border:1px solid #1e8c7914}.program-face p{color:#2f5560}.carousel-btn{width:58px;height:58px;color:var(--text-dark);cursor:pointer;z-index:10;background-color:#168c8424;border:none;border-radius:50%;font-size:34px;transition:transform .2s,background-color .2s;position:absolute;top:50%;transform:translateY(-50%)}.carousel-btn.left{left:40px}.carousel-btn.right{right:40px}.carousel-btn:hover{background-color:#168c8438;transform:translateY(-50%)scale(1.08)}.nabla-link{background:#ffffffbf;border-radius:16px;margin-top:28px;padding:14px 20px;transition:transform .2s,box-shadow .2s;display:inline-block}.nabla-link:hover{transform:scale(1.04);box-shadow:0 8px 20px #011f2e14}.nabla-logo{width:180px;max-width:100%;height:auto;display:block}@media (width<=768px){.navbar{overflow:hidden}.navbar-container{box-sizing:border-box;justify-content:center;width:100%;max-width:100%;padding:0 16px}.navbar-brand{max-width:100%}.navbar-logo{max-width:min(300px,82vw);height:auto;display:block}.navbar-links{display:none}.hero{padding-top:40px;overflow:hidden}.hero-container{box-sizing:border-box;width:100%;max-width:100%;padding:0 16px}.hero-mascot{width:min(190px,55vw);height:auto}.hero-content h1{letter-spacing:2px;text-align:center;font-size:clamp(2rem,10vw,2.7rem)}.hero-subtitle{text-align:center;font-size:1rem}.hero-date-machine{box-sizing:border-box;justify-content:center;gap:8px;width:100%;max-width:360px;margin:0 auto;padding:14px}.date-window{border-radius:12px;width:68px;height:58px}.date-window-day{width:108px}.date-window-static{width:96px}.date-value{height:58px;font-size:1.6rem;line-height:58px}.date-value-static{line-height:58px}.date-separator{font-size:1.6rem}@media (width<=430px){.hero-date-machine{gap:6px;max-width:330px;padding:12px}.date-window{width:62px;height:54px}.date-window-day{width:112px}.date-window-static{width:92px}.date-value{height:54px;font-size:1.45rem;line-height:54px}.date-value-static{line-height:54px}.date-separator{font-size:1.4rem}}.about{padding:56px 0;overflow:hidden}.about-container{box-sizing:border-box;width:100%;max-width:100%;padding:0 16px}.about .cube-carousel{gap:0;width:100%;position:relative}.about .cube-scene{perspective:none;width:100%;height:auto;min-height:0;overflow:visible}.about .cube{transform-style:flat;width:100%;height:auto;min-height:0;position:relative;transform:none!important}.about .cube-face{box-sizing:border-box;backface-visibility:visible;opacity:0;width:100%;max-width:100%;height:auto;min-height:0;padding:56px 28px;animation:.35s forwards mobileCardIn;display:none;position:relative;transform:none!important}.about .cube-face.active{flex-direction:column;justify-content:center;align-items:center;display:flex}.about .cube-face h2{overflow-wrap:break-word;text-align:center;max-width:100%;margin-bottom:16px;font-size:clamp(2.4rem,11vw,3.4rem);line-height:1.05}.about .cube-face p{text-align:center;max-width:100%;margin-top:20px;font-size:1rem;line-height:1.65}.about .nabla-logo{max-width:190px;height:auto}.about .carousel-btn{width:42px;height:42px;font-size:28px;top:50%;transform:translateY(-50%)}.about .carousel-btn.left{left:4px}.about .carousel-btn.right{right:4px}@keyframes mobileCardIn{0%{opacity:0;transform:translate(20px)scale(.98)}to{opacity:1;transform:translate(0)scale(1)}}.program{padding:56px 0;overflow:hidden}.program-container{box-sizing:border-box;width:100%;max-width:100%;padding:0 16px}.program .cube-carousel{gap:0;width:100%;position:relative}.program .cube-scene{perspective:none;width:100%;height:auto;min-height:0;overflow:visible}.program .cube{transform-style:flat;width:100%;height:auto;min-height:0;position:relative;transform:none!important}.program .cube-face{box-sizing:border-box;backface-visibility:visible;opacity:0;width:100%;max-width:100%;height:auto;min-height:0;padding:56px 28px;animation:.35s forwards mobileCardIn;display:none;position:relative;transform:none!important}.program .cube-face.active{flex-direction:column;justify-content:center;align-items:center;display:flex}.program .cube-face h2{overflow-wrap:break-word;text-align:center;max-width:100%;margin-bottom:16px;font-size:clamp(2rem,10vw,3rem);line-height:1.05}.program .cube-face p,.program .program-list,.program .program-scroll,.program .speakers-list{text-align:center;max-width:100%;font-size:1rem;line-height:1.6}.program .carousel-btn{width:42px;height:42px;font-size:28px;top:50%;transform:translateY(-50%)}.program .carousel-btn.left{left:4px}.program .carousel-btn.right{right:4px}}@media (width<=430px){.hero-date-machine{gap:6px;max-width:330px;padding:12px}.date-window{width:62px;height:54px}.date-window-day{width:112px}.date-window-static{width:92px}.date-value{height:54px;font-size:1.45rem;line-height:54px}.date-value-static{line-height:54px}.date-separator{font-size:1.4rem}}.register{background:#eaf6f4;padding:90px 20px}.register-container{text-align:center;max-width:760px;margin:0 auto}.register-form{background:#fff;border-radius:28px;grid-template-columns:1fr 1fr;gap:18px;margin-top:40px;padding:34px;display:grid;box-shadow:0 18px 45px #00000014}.register-form input,.register-form textarea{width:100%;font:inherit;background:#f8fcfb;border:1px solid #0057672e;border-radius:14px;outline:none;padding:15px 18px}.register-form textarea{resize:vertical;min-height:120px}.register-form input:focus,.register-form textarea:focus{border-color:#005767;box-shadow:0 0 0 4px #0057671f}.register-form .full-width{grid-column:1/-1}.register-form button{cursor:pointer;border:none;justify-self:center;min-width:230px}.status-message{margin-top:18px;font-weight:700}@media (width<=700px){.register{padding:70px 16px}.register-form{border-radius:22px;grid-template-columns:1fr;padding:24px}.register-form button{width:100%;min-width:0}}.register-form select{width:100%;font:inherit;background:#f8fcfb;border:1px solid #0057672e;border-radius:14px;outline:none;padding:15px 18px}.form-check{text-align:left;color:var(--text-muted);align-items:center;gap:10px;font-weight:600;display:flex}.form-check input{width:auto}.form-group{text-align:left;gap:10px;display:grid}.form-group p{margin:0;font-size:1rem;font-weight:700}.form-section{text-align:left;background:#f8fcfb;border:1px solid #00576724;border-radius:18px;gap:12px;padding:20px;display:grid}.form-section-title{color:var(--text-dark);align-items:center;gap:10px;margin:0;font-size:1rem;font-weight:800;display:flex}.required-badge{color:#8b1e3f;background:#f8dce5;border-radius:999px;padding:4px 8px;font-size:.8rem;font-weight:700}.optional-badge{color:#5f6c73;background:#eef2f4;border-radius:999px;padding:4px 8px;font-size:.8rem;font-weight:700}.form-section small{color:var(--text-muted);font-weight:600}.form-check{padding:6px 0}.program-detail h3{margin-bottom:1rem;font-size:2rem;font-weight:700}