.header{z-index:1000;transition:all var(--transition-normal);padding:1.5rem 0;position:fixed;top:0;left:0;right:0}.header.header-dark-bg:not(.scrolled){background-color:var(--primary-dark);background-image:linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);padding:1.25rem 0;box-shadow:0 4px 20px #00000040}.header.header-dark-bg:not(.scrolled) .nav-links a{color:#fff;text-shadow:none}.header.scrolled{background-color:var(--background);box-shadow:var(--shadow-md);background-image:none;padding:1rem 0}.header-container{max-width:var(--max-width);justify-content:space-between;align-items:center;margin:0 auto;padding:0 2rem;display:flex}.logo-link{align-items:center;display:flex}.logo{width:auto;height:40px;transition:transform var(--transition-fast)}.logo:hover{transform:scale(1.05)}.nav-links{gap:2rem;display:flex}.nav-links a{font-family:var(--font-heading);color:#fff;text-shadow:0 1px 3px #00000080;font-weight:600;position:relative}.header.scrolled .nav-links a{color:var(--text-main);text-shadow:none}.nav-links a:after{content:"";background-color:var(--accent);width:0;height:2px;transition:width var(--transition-normal);position:absolute;bottom:-4px;left:0}.nav-links a:hover:after{width:100%}.header.header-minimal{z-index:1000;box-shadow:none;pointer-events:none;background:0 0;padding:1.5rem 0;position:absolute;top:0;left:0;right:0}.header.header-minimal .logo-link{pointer-events:auto}.header-container-minimal{justify-content:flex-start;max-width:100%;padding:0 2.5rem}:root[data-theme=dark] .header.scrolled{-webkit-backdrop-filter:blur(12px);background-color:#0f172af2;border-bottom:1px solid #ffffff14;box-shadow:0 4px 20px #0006}:root[data-theme=dark] .header.scrolled .nav-links a{color:#f8fafc;text-shadow:none}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .header.scrolled{-webkit-backdrop-filter:blur(12px);background-color:#0f172af2;border-bottom:1px solid #ffffff14;box-shadow:0 4px 20px #0006}:root:not([data-theme=light]) .header.scrolled .nav-links a{color:#f8fafc;text-shadow:none}}@media (max-width:768px){.nav-links{display:none}}