:root{--brand-accent: #667eea;--brand-accent-secondary: #5568d3;--brand-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--brand-font);background:#0a0a0f;color:#ffffffe6;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.page-layout{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1}.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:#0a0a0fcc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.05)}.nav-container{max-width:1200px;margin:0 auto;padding:1rem 1.5rem;display:flex;align-items:center;justify-content:space-between}.logo-link{text-decoration:none}.logo-text{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;gap:2rem}.nav-links a{color:#ffffffb3;text-decoration:none;font-size:.95rem;font-weight:500;transition:color .2s ease}.nav-links a:hover{color:#fff}.mobile-menu-btn{display:none;padding:.5rem;background:transparent;border:none;cursor:pointer}.hamburger{display:flex;flex-direction:column;gap:5px;width:24px}.hamburger span{display:block;height:2px;background:#fffc;border-radius:1px;transition:all .3s ease}.hamburger.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.hamburger.open span:nth-child(2){opacity:0}.hamburger.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}.mobile-nav{display:none;flex-direction:column;padding:1rem 1.5rem 1.5rem;background:#0a0a0ff2;border-top:1px solid rgba(255,255,255,.05)}.mobile-nav a{display:block;padding:.75rem 0;color:#fffc;text-decoration:none;font-size:1rem;font-weight:500;border-bottom:1px solid rgba(255,255,255,.05);transition:color .2s ease}.mobile-nav a:last-child{border-bottom:none}.mobile-nav a:hover{color:#fff}.footer-links a{color:#ffffff80;text-decoration:none;font-size:.85rem;transition:color .2s ease}.footer-links a:hover{color:#fffc}.site-footer{background:#0006;border-top:1px solid rgba(255,255,255,.05);padding:2rem 1.5rem}.footer-container{max-width:1200px;margin:0 auto;text-align:center}.footer-container p{color:#ffffff80;font-size:.9rem;margin:.5rem 0}.footer-tagline{font-style:italic}.error-page-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1.5rem;background:#0a0a0f}.error-content{max-width:600px;text-align:center}.error-code{font-size:8rem;font-weight:900;line-height:1;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:1rem;opacity:.9}.error-title{font-size:2.5rem;font-weight:700;color:#fffffff2;margin-bottom:1rem}.error-message{font-size:1.125rem;color:#ffffffb3;margin-bottom:2.5rem;line-height:1.6}.error-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-bottom:2rem}.error-button{padding:.875rem 2rem;font-size:1rem;font-weight:600;border-radius:8px;text-decoration:none;border:none;cursor:pointer;transition:all .2s ease;font-family:var(--brand-font)}.error-button.primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.error-button.primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px #667eea66}.error-button.secondary{background:#ffffff0d;color:#ffffffe6;border:1px solid rgba(255,255,255,.1)}.error-button.secondary:hover{background:#ffffff1a;border-color:#fff3}.error-details{margin-top:2rem;padding-top:2rem;border-top:1px solid rgba(255,255,255,.1)}.error-help-text{font-size:.95rem;color:#ffffff80;font-style:italic}@media(max-width:768px){.nav-links{display:none}.mobile-menu-btn{display:block}.mobile-nav{display:flex}.logo-text{font-size:1.25rem}.error-code{font-size:5rem}.error-title{font-size:1.75rem}.error-message{font-size:1rem}.error-actions{flex-direction:column;align-items:stretch}.error-button{width:100%}}