: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}*{margin:0;padding:0;box-sizing:border-box;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}body{background:var(--gradient-bg);color:var(--light-text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden}.container{max-width:1200px;margin:0 auto;padding:0 2rem}header{padding:1.5rem 0;width:100%;background-color:#0f1221e6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.navbar{display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.8rem;font-weight:700;display:flex;align-items:center;gap:.5rem}.logo .helium{background:linear-gradient(to right,var(--primary-color),var(--accent-color));-webkit-background-clip:text;background-clip:text;color:transparent}.logo .tenna{color:var(--light-text)}.logo a{text-decoration:none}.nav-links{display:flex;gap:2rem}.nav-links a{color:var(--medium-text);text-decoration:none;font-weight:500;padding:.5rem 0;border-bottom:2px solid transparent;transition:all .3s ease}.nav-links a:hover{color:var(--light-text);border-color:var(--primary-color)}.nav-links a.cta{background-color:var(--primary-color);color:#fff;padding:.5rem 1.5rem;border-radius:50px;border:none}.nav-links a.cta:hover{background-color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 20px #5a4ad133}.auth-section{flex:1;display:flex;align-items:center;justify-content:center;padding:4rem 0;position:relative}.auth-section:before{content:"";position:absolute;top:-10%;right:-10%;width:600px;height:600px;background:radial-gradient(circle,#7b68ee26,#0f122100 70%);z-index:-1}.auth-section:after{content:"";position:absolute;bottom:-10%;left:-10%;width:600px;height:600px;background:radial-gradient(circle,#00bfff1a,#0f122100 70%);z-index:-1}.auth-container{width:100%;padding:2.5rem;background-color:var(--card-bg);border-radius:16px;box-shadow:0 20px 40px #0003;position:relative;overflow:hidden}.auth-container:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(to right,var(--primary-color),var(--accent-color))}.auth-header{text-align:center;margin-bottom:2.5rem}.auth-header h1{font-size:2rem;font-weight:700;margin-bottom:1rem;color:var(--light-text)}.auth-header p{color:var(--medium-text);font-size:1rem}.input-group{margin-bottom:1.5rem}.input-group label{display:block;margin-bottom:.5rem;color:var(--medium-text);font-weight:500}.input-group input,.input-group select{width:100%;padding:.9rem 1rem;border:2px solid var(--input-bg);border-radius:8px;background-color:var(--input-bg);color:var(--light-text);font-size:1rem;transition:all .3s ease}.input-group input:focus,.input-group select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #7b68ee33}.input-group select{-webkit-appearance:none;-moz-appearance:none;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-repeat:no-repeat;background-position:right 1rem center;background-size:1.2em;padding-right:2.5rem}.checkbox-group{display:flex;align-items:flex-start;margin-bottom:1.5rem;gap:.75rem}.checkbox-group input[type=checkbox]{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:20px;height:20px;border:2px solid var(--input-bg);border-radius:4px;background-color:var(--input-bg);display:inline-block;position:relative;margin-top:.2rem;cursor:pointer;transition:all .3s ease}.checkbox-group input[type=checkbox]:checked{background-color:var(--primary-color);border-color:var(--primary-color)}.checkbox-group input[type=checkbox]:checked:after{content:"";position:absolute;left:6px;top:2px;width:5px;height:10px;border:solid white;border-width:0 2px 2px 0;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 ease}.checkbox-group label a:hover{color:var(--accent-color);text-decoration:underline}.forgot-password{display:block;text-align:right;color:var(--primary-light);text-decoration:none;font-size:.9rem;margin-bottom:2rem;transition:color .3s ease}.forgot-password:hover{color:var(--accent-color);text-decoration:underline}.btn{display:inline-block;text-decoration:none;font-weight:600;font-size:1rem;padding:.9rem 2rem;border-radius:50px;text-align:center;transition:all .3s ease;cursor:pointer;border:none;width:100%}.btn-primary{background-color:var(--primary-color);color:#fff;box-shadow:0 4px 15px #7b68ee66}.btn-primary:hover{background-color:var(--primary-dark);box-shadow:0 8px 25px #7b68ee80;transform:translateY(-3px)}.alternate-action{margin-top:2rem;text-align:center;color:var(--medium-text)}.alternate-action a{color:var(--primary-light);text-decoration:none;font-weight:500;transition:color .3s ease}.alternate-action a:hover{color:var(--accent-color);text-decoration:underline}.alert{margin:1.5rem 0;padding:1rem;border-radius:8px;display:flex;align-items:flex-start;animation:slideIn .3s ease forwards;position:relative}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.alert-success{background-color:#56d36426;border-left:4px solid var(--success)}.alert-error{background-color:#f8514926;border-left:4px solid var(--error)}.alert-icon{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;margin-right:1rem;flex-shrink:0}.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{font-size:1.1rem;margin-bottom:.25rem;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{background:none;border:none;color:var(--medium-text);font-size:1.2rem;cursor:pointer;padding:0 .5rem;align-self:flex-start}.alert-close:hover{color:var(--light-text)}footer{background-color:var(--dark-bg);padding:4rem 0 2rem}.footer-content{display:grid;grid-template-columns:2fr 1fr 1fr;gap:4rem;align-items:flex-start}.footer-brand{max-width:400px}.footer-logo{font-size:1.5rem;font-weight:700;margin-bottom:1rem}.footer-links{display:flex;flex-direction:column;gap:1rem}.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);font-size:.9rem;margin-top:1rem}.login-container{max-width:450px}.register-container{max-width:500px}.verify-email-container{max-width:550px}.nav-toggle{display:none;background:none;border:none;color:var(--light-text);font-size:1.5rem;cursor:pointer}.mobile-menu{position:fixed;top:0;right:0;width:100%;height:100vh;background-color:var(--dark-bg);z-index:200;transform:translate(100%);transition:transform .3s ease;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:2rem}.mobile-menu.active{transform:translate(0)}.mobile-menu-close{position:absolute;top:1.5rem;right:1.5rem;background:none;border:none;color:var(--light-text);font-size:1.5rem;cursor:pointer}.mobile-menu .nav-links{display:flex;flex-direction:column;gap:2rem;align-items:center}.mobile-menu .nav-links a{font-size:1.25rem;border:none;padding:.5rem 1.5rem}.mobile-menu .nav-links a.cta{margin-top:1rem;padding:.75rem 2rem}@media (max-width: 768px){.nav-toggle{display:block}.navbar .nav-links{display:none}.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 (max-width: 576px){.auth-container{max-width:100%;padding:1.5rem;border-radius:12px}.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%}}