*{margin:0;padding:0;box-sizing:border-box}:root{--primary:#0066ff;--primary-dark:#0052cc;--secondary:#00d4ff;--success:#00ff88;--danger:#ff3366;--warning:#ffaa00;--dark:#0a0e27;--light:#f0f4ff;--text:#e0e6f0;--text-muted:#8892b0}[data-theme=light]{--dark:#ffffff;--light:#0a0e27;--text:#1a1f3a;--text-muted:#6b7280;--primary:#0052cc;--secondary:#0099cc;background:#f8f9fa}[data-theme=light] body{background:#f8f9fa;color:#1a1f3a}[data-theme=light] .bg-animation{background:linear-gradient(135deg,#f8f9fa 0%,#e9ecef 100%)}[data-theme=light] .particle{background:rgba(0,102,255,.1)}[data-theme=light] header{background:rgba(255,255,255,.9);border-bottom:1px solid rgba(0,0,0,.1)}[data-theme=light] input,[data-theme=light] textarea,[data-theme=light] select{background:#fff;border:1px solid #d1d5db;color:#1a1f3a}[data-theme=light] input::placeholder,[data-theme=light] textarea::placeholder{color:#9ca3af;opacity:1}[data-theme=light] input:focus,[data-theme=light] textarea:focus,[data-theme=light] select:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(0,82,204,.1)}[data-theme=light] .mobile-menu-overlay{background:rgba(255,255,255,.95)}[data-theme=light] footer{border-top:1px solid rgba(0,0,0,5%)}body{font-family:-apple-system,BlinkMacSystemFont,segoe ui,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--dark);color:var(--text);line-height:1.6;overflow-x:hidden;min-height:100vh}.skip-link{position:absolute;top:-40px;left:0;background:var(--primary);color:#fff;padding:8px;text-decoration:none;z-index:100}.skip-link:focus{top:0}.bg-animation{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;background:linear-gradient(135deg,#0a0e27 0%,#1a1f3a 100%);overflow:hidden}.bg-animation::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(0,102,255,.1) 0%,transparent 70%);animation:pulse 20s ease-in-out infinite}@keyframes pulse{0%,100%{transform:scale(1)rotate(0)}50%{transform:scale(1.1)rotate(180deg)}}.particle{position:absolute;background:var(--secondary);width:2px;height:2px;border-radius:50%;opacity:.3;animation:float 20s linear infinite}@keyframes float{from{transform:translateY(100vh)rotate(0)}to{transform:translateY(-100vh)rotate(360deg)}}header{position:fixed;top:0;width:100%;z-index:1000;background:rgba(10,14,39,.8);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.1);padding:1rem 0}nav{display:flex;justify-content:space-between;align-items:center}.nav-links{display:flex;gap:2rem;list-style:none;margin-left:auto;margin-right:2rem}.nav-links a{color:var(--text);text-decoration:none;transition:color .3s}.nav-links a:hover{color:var(--secondary)}.container{max-width:1200px;margin:0 auto;padding:0 2rem}.logo{display:flex;align-items:center;gap:.75rem;text-decoration:none;transition:transform .3s ease}.logo:hover{transform:scale(1.05)}.logo-icon{width:40px;height:40px;position:relative}.logo-wave{width:100%;height:100%;stroke:url(#logoGradient);stroke-width:3;fill:none;filter:drop-shadow(0 0 10px rgba(0,102,255,.3))}.logo-text{font-size:1.75rem;font-weight:800;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-actions{display:flex;align-items:center;gap:1rem}.theme-toggle-wrapper{position:relative;display:inline-block}.theme-toggle-checkbox{position:absolute;opacity:0;width:0;height:0}.theme-toggle-label{display:block;width:50px;height:26px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:34px;cursor:pointer;position:relative;transition:all .3s ease}.theme-toggle-label:hover{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.3)}.theme-toggle-switch{position:absolute;top:3px;left:3px;width:18px;height:18px;background:#fff;border-radius:50%;transition:transform .3s ease;box-shadow:0 2px 4px rgba(0,0,0,.2)}.theme-toggle-checkbox:checked+.theme-toggle-label .theme-toggle-switch{transform:translateX(24px)}.theme-toggle-checkbox:checked+.theme-toggle-label{background:var(--primary);border-color:var(--primary)}[data-theme=light] .theme-toggle-label{background:rgba(0,0,0,.1);border-color:rgba(0,0,0,.2)}[data-theme=light] .theme-toggle-label:hover{background:rgba(0,0,0,.2);border-color:rgba(0,0,0,.3)}.mobile-menu-toggle{display:none;background:0 0;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:.5rem;transition:color .3s}.mobile-menu-toggle:hover{color:var(--secondary)}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(10,14,39,.95);z-index:999;backdrop-filter:blur(10px)}.mobile-menu-overlay.active{display:block}.mobile-menu{padding:5rem 2rem;text-align:center}.mobile-menu .nav-links{display:flex;flex-direction:column;gap:2rem;list-style:none}.mobile-menu .nav-links a{font-size:1.5rem;color:var(--text);text-decoration:none;transition:color .3s}.mobile-menu .nav-links a:hover{color:var(--secondary)}.close-mobile-menu{position:absolute;top:2rem;right:2rem;background:0 0;border:none;color:var(--text);font-size:2rem;cursor:pointer}h1{font-size:clamp(2.5rem,8vw,4.5rem);font-weight:800;margin-bottom:1.5rem;line-height:1.1}h2{font-size:2rem;margin-bottom:1rem}h3{font-size:1.5rem;margin-bottom:1rem}.gradient-text{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 50%,var(--success) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.btn-primary{padding:1rem 2.5rem;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}.btn-primary::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transition:left .5s}.btn-primary:hover::before{left:100%}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,102,255,.4)}.btn-primary:disabled{opacity:.7;cursor:not-allowed}input,textarea,select{padding:1rem 1.5rem;background:rgba(255,255,255,5%);border:1px solid rgba(255,255,255,.1);border-radius:10px;color:var(--text);font-size:1rem;transition:all .3s ease;font-family:inherit}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--primary);background:rgba(255,255,255,8%);box-shadow:0 0 30px rgba(0,102,255,.3)}.message{padding:1rem 2rem;border-radius:10px;margin-bottom:2rem;display:none;animation:fadeIn .5s ease-out}.message.success{background:rgba(0,255,136,.1);border:1px solid var(--success);color:var(--success)}.message.error{background:rgba(255,51,102,.1);border:1px solid var(--danger);color:var(--danger)}footer{padding:2rem 0;text-align:center;color:var(--text-muted);border-top:1px solid rgba(255,255,255,5%)}.footer-disclaimer{font-size:.75rem;margin-top:1rem;opacity:.7}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{to{opacity:1;transform:translateX(0)}}@keyframes glow{0%,100%{box-shadow:0 0 20px rgba(0,212,255,.3)}50%{box-shadow:0 0 30px rgba(0,212,255,.5)}}@media(max-width:768px){.logo-icon{width:35px;height:35px}.logo-text{font-size:1.5rem}h1{font-size:2.5rem}.nav-links{display:none}.mobile-menu-toggle{display:block}.container{padding:0 1rem}}