.header{position:fixed;top:0;left:0;width:100%;z-index:100;padding:1.25rem 0;transition:padding .3s cubic-bezier(.4,0,.2,1),background-color .3s cubic-bezier(.4,0,.2,1),border-color .3s cubic-bezier(.4,0,.2,1),backdrop-filter .3s cubic-bezier(.4,0,.2,1);border-bottom:1px solid transparent}.header.scrolled{padding:.75rem 0;background:color-mix(in srgb,var(--color-bg) 78%,transparent);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--grid-border)}.header-container{display:flex;align-items:center;justify-content:space-between}.logo{font-family:var(--font-sans);font-size:1.5rem;font-weight:800;color:var(--text-primary);display:flex;align-items:center;gap:.25rem}.logo-accent{color:var(--primary);background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.nav-menu{display:flex;align-items:center;gap:2rem}.nav-link{font-size:.95rem;font-weight:500;color:var(--text-secondary);position:relative;padding:.25rem 0}.nav-link:hover{color:var(--text-primary)}.nav-link:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--gradient-accent);transition:width .3s ease;border-radius:2px}.nav-link:hover:after{width:100%}.header-actions{display:flex;align-items:center;gap:1rem}.mobile-menu-toggle{display:none;background:none;border:none;color:var(--text-primary);cursor:pointer;padding:.5rem;border-radius:8px;transition:background .2s}.mobile-menu-toggle:hover{background:color-mix(in srgb,var(--color-text) 8%,transparent)}main{padding-top:5rem}@media(max-width:768px){.mobile-menu-toggle{display:block}.nav-menu{position:fixed;top:5rem;left:0;width:100%;height:calc(100vh - 5rem);background:color-mix(in srgb,var(--color-bg) 92%,transparent);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);flex-direction:column;justify-content:center;gap:2.5rem;padding:2rem;transform:translateY(-100%);opacity:0;pointer-events:none;transition:all .4s cubic-bezier(.4,0,.2,1);border-top:1px solid var(--grid-border)}.nav-menu.active{transform:translateY(0);opacity:1;pointer-events:all}.nav-link{font-size:1.5rem}}.footer-brutalist{margin-top:8rem;padding:6rem 2rem 2rem;background:color-mix(in srgb,var(--color-text) 4%,transparent);border-top:2px solid var(--grid-border);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.footer-content{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:1.5fr 1fr;gap:4rem;margin-bottom:6rem}.footer-massive-text h2{font-family:var(--font-sans);font-size:clamp(4rem,8vw,8rem);font-weight:900;line-height:.9;letter-spacing:-.04em;color:var(--color-text);margin:0}.footer-links{display:flex;justify-content:flex-end;gap:6rem;padding-top:1rem}.link-group h3{font-family:var(--font-mono);font-size:var(--text-sm);text-transform:uppercase;letter-spacing:.1em;color:color-mix(in srgb,var(--color-text) 50%,transparent);margin-bottom:2rem}.footer-link{display:block;font-family:var(--font-sans);font-size:var(--text-xl);font-weight:600;color:var(--color-text);text-decoration:none;margin-bottom:1rem;transition:opacity .3s ease}.footer-link:hover{opacity:.5}.lab-link{display:flex;align-items:center;gap:1rem}.lab-badge{font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;background:var(--btn-bg);color:var(--btn-color);padding:.2rem .6rem;border-radius:var(--btn-radius);font-weight:800}.footer-bottom{max-width:1400px;margin:0 auto;display:flex;justify-content:space-between;padding-top:2rem;border-top:1px solid var(--grid-border);font-family:var(--font-mono);font-size:var(--text-sm);color:color-mix(in srgb,var(--color-text) 60%,transparent)}@media(max-width:1024px){.footer-content{grid-template-columns:1fr;gap:3rem}.footer-links{justify-content:flex-start;gap:4rem}}@media(max-width:640px){.footer-brutalist{padding:4rem 1rem 2rem}.footer-links{flex-direction:column;gap:3rem}.footer-bottom{flex-direction:column;gap:1rem;text-align:center}}.lang-picker{display:inline-flex;background:color-mix(in srgb,var(--color-text) 4%,transparent);border:1px solid color-mix(in srgb,var(--color-text) 8%,transparent);border-radius:9999px;padding:.25rem;gap:.25rem;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.lang-link{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;font-size:.75rem;font-weight:700;color:var(--text-secondary);transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.lang-link:hover{color:var(--text-primary);background:color-mix(in srgb,var(--color-text) 6%,transparent)}.lang-link.active{color:var(--btn-color, #ffffff);background:var(--gradient-accent);box-shadow:0 4px 12px color-mix(in srgb,var(--btn-bg) 35%,transparent)}.theme-selector-container{position:relative;display:inline-flex;align-items:center}.theme-dropdown{background:color-mix(in srgb,var(--color-text) 6%,transparent);border:1px solid color-mix(in srgb,var(--color-text) 14%,transparent);color:var(--color-text, #fff);font-family:var(--font-sans);padding:.4rem 2rem .4rem .8rem;border-radius:6px;font-size:.85rem;cursor:pointer;outline:none;transition:all .2s;appearance:none;background-image:url(data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%22//www.w3.org/2000/svg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23888888%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22/%3E%3C/svg%3E);background-repeat:no-repeat;background-position:right .7rem top 50%;background-size:.65rem auto}.theme-dropdown:hover,.theme-dropdown:focus{background-color:color-mix(in srgb,var(--color-text) 12%,transparent);border-color:color-mix(in srgb,var(--color-text) 22%,transparent)}.theme-dropdown option{background-color:var(--color-bg, #1a1a1a);color:var(--color-text, #ffffff)}