:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.error-container{text-align:center;margin-top:4rem;color:red}.social-icon-substack{height:1.5rem!important;width:1.3rem!important;display:inline-block!important;vertical-align:middle!important;margin:0 .22rem .55rem!important}:root{--color-bg: #181a1b;--color-bg-section: #23272b;--color-card: #23272b;--color-text: #f3f3f3;--color-header: #fff;--color-link: #7dcfff;--color-footer: #bbb;--color-shadow: 0 1px 4px rgba(0, 0, 0, .4);--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--space-8: 3rem;--space-10: 4rem;--font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;--font-family-heading: "Playfair Display", Georgia, "Times New Roman", serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.5rem;--font-size-2xl: 2rem;--font-size-3xl: 2.5rem;--font-size-4xl: 3.2rem;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-full: 50%}body.light-theme{--color-bg: #fff;--color-bg-section: #fff;--color-card: #f0f0f8;--color-text: #222;--color-header: #1a1a1a;--color-link: #1a0dab;--color-footer: #555;--color-shadow: 0 1px 4px rgba(0, 0, 0, .04)}*:focus-visible{outline:3px solid var(--color-link);outline-offset:2px}.skip-link{position:absolute;top:-40px;left:0;background:var(--color-bg-section);color:var(--color-link);padding:8px 16px;z-index:200;text-decoration:none;font-weight:600;border-radius:0 0 4px}.skip-link:focus{top:0}body{background:var(--color-bg);color:var(--color-text);transition:background .2s,color .2s}#root{max-width:1280px;margin:0 auto;padding:2rem;text-align:center}.logo{height:6em;padding:1.5em;will-change:filter;transition:filter .3s}.logo:hover{filter:drop-shadow(0 0 2em #646cffaa)}.logo.react:hover{filter:drop-shadow(0 0 2em #61dafbaa)}@keyframes logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (prefers-reduced-motion: no-preference){a:nth-of-type(2) .logo{animation:logo-spin infinite 20s linear}}.card{padding:2em}.read-the-docs{color:#888}.main-container{font-family:var(--font-family);margin:0 auto;max-width:1200px;padding:16px;background:var(--color-bg);color:var(--color-text)}header.welcome{background:var(--color-bg-section);padding:2rem 1rem;text-align:center;border-radius:8px;margin-bottom:2rem;color:var(--color-header);scroll-margin-top:4.5rem}h1,h2,h3{font-family:var(--font-family-heading)}section{margin-bottom:2rem;padding:1rem;border-radius:8px;background:var(--color-bg-section);box-shadow:var(--color-shadow);color:var(--color-text);scroll-margin-top:4.5rem}.books-grid{display:flex;flex-direction:column;gap:1rem}.book-card{background:var(--color-card);padding:1rem;border-radius:6px;color:var(--color-text);overflow:hidden;min-height:200px;box-shadow:var(--color-shadow)}.book-info-with-cover{display:flex;flex-direction:row;align-items:flex-start;width:100%}.book-cover{flex:0 0 33%;max-width:33%;display:flex;align-items:flex-start;justify-content:center}.book-cover-thumb{width:auto;height:200px;max-width:100%;object-fit:cover;border-radius:6px;box-shadow:0 2px 8px #00000014;flex-shrink:0}.book-info{flex:1 1 0;min-width:0;padding-left:1.5rem}.book-info a:not(.book-cta-btn){color:var(--color-link)!important;text-decoration:underline}@media (max-width: 767px){.book-card{min-height:unset;text-align:center;align-items:center}.book-cover{max-width:100%;width:100%;justify-content:center;margin-bottom:1rem}.book-cover-thumb{margin:0 auto .5rem;height:160px;max-width:90vw}.book-info{padding-left:0}}footer{text-align:center;margin-top:2rem;color:var(--color-footer);background:transparent;font-size:.95rem}.nav-bar{position:fixed;top:0;left:0;width:100%;background:var(--color-bg-section);z-index:100;display:flex;align-items:center;padding:.5rem 1rem;box-shadow:var(--color-shadow);margin-right:1rem;color:var(--color-text);transition:background .3s ease,color .3s ease,box-shadow .3s ease}.menu-btn{background:none;border:none;font-size:2rem;cursor:pointer;margin-right:1rem;color:var(--color-text);transition:color .2s ease,transform .2s ease}.menu-btn:hover{transform:scale(1.1)}.nav-links{list-style:none;display:none;flex-direction:column;gap:1rem;background:var(--color-bg-section);position:absolute;top:3.5rem;left:0;width:100%;padding:1rem 0;box-shadow:var(--color-shadow);opacity:0;transform:translateY(-10px);transition:opacity .3s ease,transform .3s ease}.nav-links.open{display:flex;opacity:1;transform:translateY(0)}.nav-links li a{background:none;border:none;font-size:1.1rem;color:var(--color-text);cursor:pointer;padding:.5rem 1.5rem;text-align:left;width:100%;text-decoration:none;display:block;transition:background .2s ease,color .2s ease}.nav-links li a:hover,.nav-links li a:focus{color:var(--color-link);background:#8080801a}.nav-links li a.active{color:var(--color-link);font-weight:600;border-bottom:2px solid var(--color-link)}a,a:visited{color:var(--color-link);text-decoration:underline}a:hover,a:focus{color:#fff;background:var(--color-link);text-decoration:underline;border-radius:2px;transition:background .2s,color .2s}@media (min-width: 600px){.nav-bar{margin-right:2rem}}@media (min-width: 768px){.nav-bar{margin-right:4rem}.menu-btn{display:none}.nav-links{display:flex!important;position:static;flex-direction:row;gap:2rem;box-shadow:none;background:none;padding:0;width:auto;opacity:1;transform:none}.nav-links li a{padding:.5rem 1rem;font-size:1rem}}@media (min-width: 992px){.nav-bar{margin-right:8rem}header.welcome{padding:3rem 2rem}section{padding:2rem}}@media (min-width: 1200px){.nav-bar{margin-right:12rem}.main-container{max-width:1000px}}.main-container{padding-top:3.5rem}.about-me-content{display:block;overflow:hidden}.about-me-headshot{float:left;margin-right:1.5rem;margin-bottom:1rem;width:auto;height:150px;max-width:100%;object-fit:cover;border-radius:50%;box-shadow:0 2px 8px #00000014;flex-shrink:0}.about-me-text{overflow:hidden;color:var(--color-text);text-align:left}@media (max-width: 767px){.about-me-headshot{float:none;display:block;margin:0 auto 1rem}.about-me-content,.about-me-text{text-align:left;color:var(--color-text)}}.theme-toggle-btn{margin-top:1rem;background:none;border:1px solid var(--color-footer);color:var(--color-footer);border-radius:4px;padding:.5rem 1rem;cursor:pointer;font-size:1rem;transition:background .2s,color .2s,border .2s}.theme-toggle-btn:hover{background:var(--color-footer);color:var(--color-bg)}.social-icon{width:1.1rem;height:1.1rem;vertical-align:middle;display:inline-block;filter:none}.social-icon-threads{margin:-.5rem 0 0 .1rem}.social-icon-container{margin:"0 0.5rem";color:"inherit";font-size:"1.7rem";vertical-align:"middle"}body.dark-theme .social-icon{color:#f3f3f3;filter:brightness(1.2) grayscale(1) invert(1)}body.light-theme .social-icon{color:#222;filter:none}.contact-me{margin-bottom:2rem;padding:1rem;border-radius:8px;background:var(--color-bg-section);box-shadow:var(--color-shadow);color:var(--color-text);text-align:left}.contact-me-content{font-size:1.1rem;margin-top:.5rem}.contact-email-link{font-size:1.1rem;transition:color .2s}.contact-email-link:hover,.contact-email-link:focus{color:#fff;background:var(--color-link);border-radius:2px;text-decoration:underline}.articles-section{float:none;width:auto;clear:both;text-align:left;margin-left:0;margin-right:0;box-sizing:border-box}.articles-section h2{text-align:center}@media (min-width: 900px){.articles-section{width:auto;margin-right:0}}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:6px;font-weight:500;cursor:pointer;transition:all .2s ease;text-decoration:none;border:2px solid transparent}.btn:focus-visible{outline:3px solid var(--color-link);outline-offset:2px}.btn-small{padding:.375rem .75rem;font-size:.875rem}.btn-medium{padding:.5rem 1rem;font-size:1rem}.btn-large{padding:.75rem 1.5rem;font-size:1.125rem}.btn-primary{background:var(--color-link);color:#fff;border-color:var(--color-link)}.btn-primary:hover{background:transparent;color:var(--color-link)}.btn-secondary{background:var(--color-bg-section);color:var(--color-text);border-color:var(--color-text)}.btn-secondary:hover{background:var(--color-text);color:var(--color-bg-section)}.btn-outline{background:transparent;color:var(--color-link);border-color:var(--color-link)}.btn-outline:hover{background:var(--color-link);color:#fff}.btn-full-width{width:100%}.book-cta-btn{display:inline-flex;align-items:center;gap:.375rem;margin-top:1rem;padding:.5rem 1rem;background:var(--color-link);color:#fff!important;border-radius:6px;font-weight:500;text-decoration:none!important;transition:all .2s ease}.book-cta-btn:hover,.book-cta-btn:focus{background:transparent;color:var(--color-link)!important;outline:2px solid var(--color-link)}.card-component{background:var(--color-card);border-radius:8px;padding:1rem;box-shadow:var(--color-shadow)}.card-elevated{box-shadow:0 4px 12px #00000026}.link{color:var(--color-link);text-decoration:underline;transition:color .2s ease}.link:hover,.link:focus{color:var(--color-text)}.link-external .external-link-icon{font-size:.875em;margin-left:.125rem}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes highlightSection{0%{box-shadow:var(--color-shadow)}50%{box-shadow:0 0 20px #5eb8ff4d}to{box-shadow:var(--color-shadow)}}section{animation:fadeInUp .5s ease-out}section.section-active{animation:highlightSection .8s ease-out}@media (prefers-reduced-motion: reduce){section{animation:none}section.section-active{animation:none}.nav-links,.menu-btn,.btn,.book-cta-btn{transition:none}}.toast-container{position:fixed;bottom:20px;right:20px;z-index:1000;display:flex;flex-direction:column;gap:10px;max-width:350px}.toast-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-radius:var(--radius-md);background:var(--color-bg-section);color:var(--color-text);box-shadow:0 4px 12px #0000004d;animation:toastSlideIn .3s ease-out}.toast-visible{opacity:1;transform:translate(0)}.toast-hidden{opacity:0;transform:translate(100%);transition:opacity .3s ease,transform .3s ease}.toast-success{border-left:4px solid #22c55e}.toast-error{border-left:4px solid #ef4444}.toast-info{border-left:4px solid var(--color-link)}.toast-message{flex:1;margin-right:12px}.toast-close{background:none;border:none;color:var(--color-text);font-size:1.25rem;cursor:pointer;padding:0;line-height:1;opacity:.7}.toast-close:hover{opacity:1}@keyframes toastSlideIn{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}.back-to-top{position:fixed;bottom:80px;right:20px;z-index:99;width:48px;height:48px;min-width:44px;min-height:44px;border-radius:var(--radius-full);background:var(--color-link);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px #0000004d;transition:transform .2s ease,background .2s ease,opacity .2s ease;animation:fadeInUp .3s ease-out}.back-to-top:hover{transform:translateY(-2px);background:var(--color-text)}.back-to-top:focus-visible{outline:3px solid var(--color-link);outline-offset:2px}.back-to-top-icon{font-size:1.5rem;font-weight:700;line-height:1}@media (prefers-reduced-motion: reduce){.back-to-top{animation:none;transition:none}}.scroll-progress-container{position:fixed;top:0;left:0;width:100%;height:3px;background:transparent;z-index:101}.scroll-progress-bar{height:100%;background:linear-gradient(90deg,var(--color-link),#9d4edd);transition:width .1s ease-out}@media (prefers-reduced-motion: reduce){.scroll-progress-bar{transition:none}}.share-buttons{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-4)}.share-btn{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:var(--space-2) var(--space-3);border:1px solid var(--color-footer);border-radius:var(--radius-md);background:var(--color-bg-section);color:var(--color-text);cursor:pointer;font-size:var(--font-size-sm);transition:all .2s ease;gap:var(--space-2)}.share-btn:hover,.share-btn:focus{background:var(--color-link);color:#fff;border-color:var(--color-link)}.share-btn:focus-visible{outline:3px solid var(--color-link);outline-offset:2px}.share-btn-icon{font-size:1.1rem;line-height:1}.share-btn-copy{flex:1 1 auto;max-width:150px}.share-btn-twitter,.share-btn-facebook,.share-btn-linkedin{padding:var(--space-2)}.share-btn-twitter .share-btn-icon{font-weight:700}.share-btn-facebook .share-btn-icon{font-weight:700;font-family:Georgia,serif}.share-btn-linkedin .share-btn-icon{font-weight:700;font-size:.9rem;text-transform:lowercase}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (prefers-reduced-motion: reduce){.share-btn{transition:none}}.add-to-homescreen-banner{position:fixed;bottom:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:var(--space-3) var(--space-4);background:var(--color-bg-section);color:var(--color-text);box-shadow:0 -2px 10px #0003;animation:slideUpBanner .3s ease-out}.add-to-homescreen-text{flex:1;font-size:var(--font-size-sm)}.add-to-homescreen-actions{display:flex;gap:var(--space-2)}.add-to-homescreen-btn{min-width:44px;min-height:44px;padding:var(--space-2) var(--space-3);border:none;border-radius:var(--radius-md);cursor:pointer;font-size:var(--font-size-sm);font-weight:500;transition:all .2s ease}.add-to-homescreen-install{background:var(--color-link);color:#fff}.add-to-homescreen-install:hover{background:transparent;color:var(--color-link);outline:2px solid var(--color-link)}.add-to-homescreen-dismiss{background:transparent;color:var(--color-footer);padding:var(--space-2)}.add-to-homescreen-dismiss:hover{color:var(--color-text)}@keyframes slideUpBanner{0%{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}@media (prefers-reduced-motion: reduce){.add-to-homescreen-banner{animation:none}.add-to-homescreen-btn{transition:none}}.nav-links li a,.theme-toggle-btn,.toast-close,.book-cta-btn{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center}@media (max-width: 767px){.menu-btn{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center}}.social-icon-container{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:var(--space-2)}.btn:active,.share-btn:active,.back-to-top:active,.nav-links li a:active{transform:scale(.97)}.book-card,.card-component{transition:transform .2s ease,box-shadow .2s ease}.book-card:hover,.card-component:hover{transform:translateY(-2px);box-shadow:0 6px 20px #00000026}.social-icon-container:hover{transform:scale(1.1);transition:transform .2s ease}@media (prefers-reduced-motion: reduce){.btn:active,.share-btn:active,.back-to-top:active,.nav-links li a:active{transform:none}.book-card,.card-component{transition:none}.book-card:hover,.card-component:hover{transform:none}.social-icon-container:hover{transform:none;transition:none}}