:root{--primary-color:#7b68ee;--primary-light:#9d91f2;--primary-dark:#5a4ad1;--accent-color:#00bfff;--dark-bg:#0f1221;--card-bg:#1a1f35;--light-text:#f8f9fa;--medium-text:#c9d1d9;--dark-text:#8b949e;--success:#56d364;--warning:#e3b341;--error:#f85149;--gradient-bg:linear-gradient(135deg, var(--dark-bg), #182039);--input-bg:#141b2d}*{box-sizing:border-box;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}body{background:var(--gradient-bg);color:var(--light-text);flex-direction:column;min-height:100vh;line-height:1.6;display:flex;overflow-x:hidden}.container{max-width:1200px;margin:0 auto;padding:0 2rem}header{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background-color:#0f1221e6;width:100%;padding:1.5rem 0}.navbar{justify-content:space-between;align-items:center;display:flex}.logo{align-items:center;gap:.5rem;font-size:1.8rem;font-weight:700;display:flex}.logo .helium{background:linear-gradient(to right, var(--primary-color), var(--accent-color));color:#0000;-webkit-background-clip:text;background-clip:text}.logo .tenna{color:var(--light-text)}.logo a{text-decoration:none}.nav-links{gap:2rem;display:flex}.nav-links a{color:var(--medium-text);border-bottom:2px solid #0000;padding:.5rem 0;font-weight:500;text-decoration:none;transition:all .3s}.nav-links a:hover{color:var(--light-text);border-color:var(--primary-color)}.nav-links a.cta{background-color:var(--primary-color);color:#fff;border:none;border-radius:50px;padding:.5rem 1.5rem}.nav-links a.cta:hover{background-color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 20px #5a4ad133}.auth-section{flex:1;justify-content:center;align-items:center;padding:4rem 0;display:flex;position:relative}.auth-section:before{content:"";z-index:-1;background:radial-gradient(circle,#7b68ee26 0%,#0f122100 70%);width:600px;height:600px;position:absolute;top:-10%;right:-10%}.auth-section:after{content:"";z-index:-1;background:radial-gradient(circle,#00bfff1a 0%,#0f122100 70%);width:600px;height:600px;position:absolute;bottom:-10%;left:-10%}.auth-container{background-color:var(--card-bg);border-radius:16px;width:100%;padding:2.5rem;position:relative;overflow:hidden;box-shadow:0 20px 40px #0003}.auth-container:before{content:"";background:linear-gradient(to right, var(--primary-color), var(--accent-color));height:4px;position:absolute;top:0;left:0;right:0}.auth-header{text-align:center;margin-bottom:2.5rem}.auth-header h1{color:var(--light-text);margin-bottom:1rem;font-size:2rem;font-weight:700}.auth-header p{color:var(--medium-text);font-size:1rem}.input-group{margin-bottom:1.5rem}.input-group label{color:var(--medium-text);margin-bottom:.5rem;font-weight:500;display:block}.input-group input,.input-group select{border:2px solid var(--input-bg);background-color:var(--input-bg);width:100%;color:var(--light-text);border-radius:8px;padding:.9rem 1rem;font-size:1rem;transition:all .3s}.input-group input:focus,.input-group select:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #7b68ee33}.input-group select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23c9d1d9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-position:right 1rem center;background-repeat:no-repeat;background-size:1.2em;padding-right:2.5rem}.checkbox-group{align-items:flex-start;gap:.75rem;margin-bottom:1.5rem;display:flex}.checkbox-group input[type=checkbox]{appearance:none;border:2px solid var(--input-bg);background-color:var(--input-bg);cursor:pointer;border-radius:4px;width:20px;height:20px;margin-top:.2rem;transition:all .3s;display:inline-block;position:relative}.checkbox-group input[type=checkbox]:checked{background-color:var(--primary-color);border-color:var(--primary-color)}.checkbox-group input[type=checkbox]:checked:after{content:"";border:2px solid #fff;border-width:0 2px 2px 0;width:5px;height:10px;position:absolute;top:2px;left:6px;transform:rotate(45deg)}.checkbox-group label{color:var(--medium-text);font-size:.95rem}.checkbox-group label a{color:var(--primary-light);text-decoration:none;transition:color .3s}.checkbox-group label a:hover{color:var(--accent-color);text-decoration:underline}.forgot-password{text-align:right;color:var(--primary-light);margin-bottom:2rem;font-size:.9rem;text-decoration:none;transition:color .3s;display:block}.forgot-password:hover{color:var(--accent-color);text-decoration:underline}.btn{text-align:center;cursor:pointer;border:none;border-radius:50px;width:100%;padding:.9rem 2rem;font-size:1rem;font-weight:600;text-decoration:none;transition:all .3s;display:inline-block}.btn-primary{background-color:var(--primary-color);color:#fff;box-shadow:0 4px 15px #7b68ee66}.btn-primary:hover{background-color:var(--primary-dark);transform:translateY(-3px);box-shadow:0 8px 25px #7b68ee80}.alternate-action{text-align:center;color:var(--medium-text);margin-top:2rem}.alternate-action a{color:var(--primary-light);font-weight:500;text-decoration:none;transition:color .3s}.alternate-action a:hover{color:var(--accent-color);text-decoration:underline}.alert{border-radius:8px;align-items:flex-start;margin:1.5rem 0;padding:1rem;animation:.3s forwards slideIn;display:flex;position:relative}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.alert-success{border-left:4px solid var(--success);background-color:#56d36426}.alert-error{border-left:4px solid var(--error);background-color:#f8514926}.alert-icon{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;margin-right:1rem;font-weight:700;display:flex}.alert-success .alert-icon{background-color:var(--success);color:#fff}.alert-error .alert-icon{background-color:var(--error);color:#fff}.alert-content{flex:1}.alert-content h4{margin-bottom:.25rem;font-size:1.1rem;font-weight:600}.alert-success .alert-content h4{color:var(--success)}.alert-error .alert-content h4{color:var(--error)}.alert-content p{color:var(--medium-text);font-size:.95rem}.alert-close{color:var(--medium-text);cursor:pointer;background:0 0;border:none;align-self:flex-start;padding:0 .5rem;font-size:1.2rem}.alert-close:hover{color:var(--light-text)}footer{background-color:var(--dark-bg);padding:4rem 0 2rem}.footer-content{grid-template-columns:2fr 1fr 1fr;align-items:flex-start;gap:4rem;display:grid}.footer-brand{max-width:400px}.footer-logo{margin-bottom:1rem;font-size:1.5rem;font-weight:700}.footer-links{flex-direction:column;gap:1rem;display:flex}.footer-links a{color:var(--medium-text);text-decoration:none;transition:color .3s}.footer-links a:hover{color:var(--primary-light)}.copyright{color:var(--dark-text);margin-top:1rem;font-size:.9rem}.login-container{max-width:450px}.register-container{max-width:500px}.verify-email-container{max-width:550px}.nav-toggle{color:var(--light-text);cursor:pointer;background:0 0;border:none;font-size:1.5rem;display:none}.mobile-menu{background-color:var(--dark-bg);z-index:200;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100vh;padding:2rem;transition:transform .3s;display:flex;position:fixed;top:0;right:0;transform:translate(100%)}.mobile-menu.active{transform:translate(0)}.mobile-menu-close{color:var(--light-text);cursor:pointer;background:0 0;border:none;font-size:1.5rem;position:absolute;top:1.5rem;right:1.5rem}.mobile-menu .nav-links{flex-direction:column;align-items:center;gap:2rem;display:flex}.mobile-menu .nav-links a{border:none;padding:.5rem 1.5rem;font-size:1.25rem}.mobile-menu .nav-links a.cta{margin-top:1rem;padding:.75rem 2rem}@media (width<=768px){.nav-toggle{display:block}.navbar .nav-links,.auth-section:before,.auth-section:after{display:none}.auth-container{max-width:90%;padding:2rem}.form-grid{grid-template-columns:1fr}.social-login p:before,.social-login p:after{width:30%}.step-label{display:none}.footer-content{grid-template-columns:1fr;gap:2rem}.footer-brand{max-width:100%}.footer-links{gap:1rem}}@media (width<=576px){.auth-container{border-radius:12px;max-width:100%;padding:1.5rem}.nav-links{gap:1rem}.logo{font-size:1.5rem}.auth-header h1{font-size:1.8rem}.social-login p:before,.social-login p:after{width:25%}}