.site-nav{position:fixed;top:0;left:0;right:0;height:var(--header-height);background-color:var(--color-background);box-shadow:var(--shadow-small);z-index:1000;transition:height var(--transition-default),background-color var(--transition-default),box-shadow var(--transition-default)}.site-nav.scrolled{height:calc(var(--header-height) - 10px);box-shadow:var(--shadow-medium)}.site-nav .nav-container{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:1200px;margin:0 auto;padding:0 1rem}.site-nav .logo{display:flex;align-items:center;text-decoration:none}.site-nav .logo .logo-text{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:var(--color-primary);transition:color var(--transition-fast)}.site-nav .logo:hover .logo-text{color:var(--color-secondary)}.site-nav .nav-links{display:flex;gap:1.5rem}.site-nav .nav-links .nav-link{position:relative;color:var(--color-text);text-decoration:none;font-weight:500;padding:.5rem 0;transition:color var(--transition-fast)}.site-nav .nav-links .nav-link:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background-color:var(--color-primary);transition:width var(--transition-default)}.site-nav .nav-links .nav-link:hover{color:var(--color-primary)}.site-nav .nav-links .nav-link:hover:after{width:100%}.site-nav .theme-toggle{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:none;background:none;color:var(--color-text);cursor:pointer;border-radius:50%;transition:background-color var(--transition-fast),color var(--transition-fast)}.site-nav .theme-toggle:hover{background-color:#0000000d;color:var(--color-primary)}.dark-mode .site-nav .theme-toggle:hover{background-color:#ffffff1a}.site-nav .mobile-menu-toggle{display:none;flex-direction:column;justify-content:space-between;width:30px;height:21px;background:transparent;border:none;cursor:pointer;padding:0}.site-nav .mobile-menu-toggle .bar{height:3px;width:100%;background-color:var(--color-text);border-radius:3px;transition:transform var(--transition-default),opacity var(--transition-default)}@media (max-width: 768px){.site-nav .nav-container{padding:0 1rem}.site-nav .mobile-menu-toggle{display:flex;z-index:1001}.site-nav .nav-links{position:fixed;inset:0;background-color:var(--color-background);flex-direction:column;justify-content:center;align-items:center;gap:2rem;transform:translate(100%);transition:transform var(--transition-default);z-index:1000}.site-nav .nav-links .nav-link{font-size:1.25rem}.site-nav.mobile-open .nav-links{transform:translate(0)}.site-nav.mobile-open .mobile-menu-toggle .bar:nth-child(1){transform:translateY(9px) rotate(45deg)}.site-nav.mobile-open .mobile-menu-toggle .bar:nth-child(2){opacity:0}.site-nav.mobile-open .mobile-menu-toggle .bar:nth-child(3){transform:translateY(-9px) rotate(-45deg)}}.presentation-card{background:var(--theme-card-bg);border-radius:8px;padding:1.5rem;box-shadow:0 2px 8px #0000001a;transition:transform .2s}.presentation-card:hover{transform:translateY(-2px)}.presentation-card h2{margin:0 0 1rem;font-size:1.5rem}.presentation-card .metadata{display:flex;gap:1rem;color:var(--theme-text-secondary);font-size:.9rem;margin-bottom:1.5rem}.presentation-card .embed-container{position:relative;padding-bottom:56.25%;height:0}.presentation-card .embed-container .ppt-placeholder{position:absolute;width:100%;height:100%;display:grid;place-items:center;background:var(--theme-bg-alt);border-radius:4px;text-align:center;padding:1rem}*,*:before,*:after{box-sizing:border-box}:root{--color-primary: #00B5AD;--color-secondary: #40E0D0;--color-accent: #FF8C00;--color-background: #FFFFFF;--color-text: #333333;--font-body: Inter, system-ui, sans-serif;--font-heading: Montserrat, Georgia, serif;--border-radius-small: 4px;--border-radius-medium: 8px;--border-radius-large: 16px;--shadow-small: 0 2px 4px rgba(0,0,0,.1);--shadow-medium: 0 4px 8px rgba(0,0,0,.1);--shadow-large: 0 8px 16px rgba(0,0,0,.1);--transition-default: .3s ease;--transition-slow: .5s ease;--transition-fast: .15s ease;--header-height: 70px;--footer-height: 100px;--button-primary-bg: var(--color-primary);--button-primary-text: white;--button-secondary-bg: #f0f0f0;--button-secondary-text: var(--color-text);--button-hover-bg: var(--color-secondary);--card-bg: white;--card-border: 1px solid #eaeaea;--tag-bg: #f0f0f0;--tag-text: var(--color-text)}.dark-mode{--color-primary: #008B8B;--color-secondary: #20B2AA;--color-accent: #FF7F50;--color-background: #121212;--color-text: #F5F5F5;--button-secondary-bg: #2a2a2a;--button-secondary-text: #f0f0f0;--button-hover-bg: var(--color-secondary);--card-bg: #1e1e1e;--card-border: 1px solid #333;--tag-bg: #2a2a2a;--tag-text: #f0f0f0}html,body{margin:0;padding:0;font-family:var(--font-body);background-color:var(--color-background);color:var(--color-text);line-height:1.6;transition:background-color var(--transition-default),color var(--transition-default)}.site-container{display:flex;flex-direction:column;min-height:100vh}main{flex:1;padding-top:var(--header-height);padding-bottom:2rem}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);margin-top:0;line-height:1.2}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-secondary)}img{max-width:100%;height:auto}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1rem}.text-center{text-align:center}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@media (max-width: 768px){:root{--header-height: 60px}}.fade-in{animation:fadeIn .5s ease-in-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.celtic-border{position:relative}.celtic-border:before{content:"";position:absolute;top:0;left:0;right:0;height:8px;background-image:url(/images/celtic-border.svg);background-repeat:repeat-x}.site-footer[data-astro-cid-l3trhy4j]{background-color:var(--color-background);border-top:1px solid rgba(0,0,0,.1);padding:3rem 0 1.5rem;margin-top:2rem}.dark-mode[data-astro-cid-l3trhy4j] .site-footer[data-astro-cid-l3trhy4j]{border-top-color:#ffffff1a}.footer-content[data-astro-cid-l3trhy4j]{display:flex;flex-wrap:wrap;justify-content:space-between;margin-bottom:2rem}.footer-logo[data-astro-cid-l3trhy4j]{flex:1 1 300px;margin-bottom:1.5rem}.footer-logo[data-astro-cid-l3trhy4j] a[data-astro-cid-l3trhy4j]{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:var(--color-primary);text-decoration:none}.footer-logo[data-astro-cid-l3trhy4j] .tagline[data-astro-cid-l3trhy4j]{margin-top:.5rem;font-size:.9rem;color:var(--color-text);opacity:.8}.footer-links[data-astro-cid-l3trhy4j]{display:flex;flex-wrap:wrap;flex:2 1 400px}.footer-links[data-astro-cid-l3trhy4j] h3[data-astro-cid-l3trhy4j]{font-size:1rem;margin-bottom:1rem;color:var(--color-text)}.footer-links[data-astro-cid-l3trhy4j] ul[data-astro-cid-l3trhy4j]{list-style:none;padding:0;margin:0}.footer-links[data-astro-cid-l3trhy4j] li[data-astro-cid-l3trhy4j]{margin-bottom:.5rem}.footer-links[data-astro-cid-l3trhy4j] a[data-astro-cid-l3trhy4j]{color:var(--color-text);opacity:.8;text-decoration:none;transition:opacity .2s ease,color .2s ease}.footer-links[data-astro-cid-l3trhy4j] a[data-astro-cid-l3trhy4j]:hover{opacity:1;color:var(--color-primary)}.footer-nav[data-astro-cid-l3trhy4j],.footer-social[data-astro-cid-l3trhy4j]{flex:1 1 200px;margin-bottom:1.5rem}.social-links[data-astro-cid-l3trhy4j]{display:flex;gap:1rem}.social-links[data-astro-cid-l3trhy4j] a[data-astro-cid-l3trhy4j]{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background-color:#0000000d;transition:background-color .2s ease}.dark-mode[data-astro-cid-l3trhy4j] .social-links[data-astro-cid-l3trhy4j] a[data-astro-cid-l3trhy4j]{background-color:#ffffff0d}.social-links[data-astro-cid-l3trhy4j] a[data-astro-cid-l3trhy4j]:hover{background-color:var(--color-primary);color:#fff}.footer-bottom[data-astro-cid-l3trhy4j]{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;padding-top:1.5rem;border-top:1px solid rgba(0,0,0,.05);font-size:.85rem;color:var(--color-text);opacity:.7}.dark-mode[data-astro-cid-l3trhy4j] .footer-bottom[data-astro-cid-l3trhy4j]{border-top-color:#ffffff0d}.footer-bottom[data-astro-cid-l3trhy4j] p[data-astro-cid-l3trhy4j]{margin:.5rem 0}.footer-bottom[data-astro-cid-l3trhy4j] a[data-astro-cid-l3trhy4j]{color:var(--color-primary)}@media (max-width: 768px){.footer-content[data-astro-cid-l3trhy4j],.footer-bottom[data-astro-cid-l3trhy4j]{flex-direction:column;text-align:center}.social-links[data-astro-cid-l3trhy4j]{justify-content:center}}