.letter-page{--lp-bg:#0f1512;--lp-text:#00ff9d;--lp-text-bright:#4dffbe;--lp-text-dim:#00cc7d;--lp-text-muted:#8e9896;--lp-white:#f0f0f0;--lp-white-dim:#b0b8b5;--lp-border:rgba(255,255,255,0.06);--lp-border-hover:rgba(0,255,157,0.25);--lp-accent:#00e5ff;--lp-glow-sm:0 0 8px rgba(0,255,157,0.12);--lp-glow-md:0 0 20px rgba(0,255,157,0.16);--lp-glow-lg:0 0 40px rgba(0,255,157,0.12),0 0 80px rgba(0,255,157,0.04);--lp-glow-text:0 0 12px rgba(0,255,157,0.35);--lp-radius-sm:6px;--lp-radius-md:12px;--lp-radius-lg:16px;--lp-radius-pill:100px;--lp-transition-fast:0.2s cubic-bezier(0.4,0,0.2,1);--lp-transition-smooth:0.4s cubic-bezier(0.16,1,0.3,1);min-height:100vh;isolation:isolate;font-family:var(--font-mono);background:radial-gradient(120% 120% at 50% 40%,#17201b 0,var(--lp-bg) 55%,#060807 100%) fixed;color:var(--lp-white-dim);line-height:1.7;overflow-x:hidden;width:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.letter-page ::selection{background:var(--lp-text);color:var(--lp-bg)}.letter-page:after{content:"";position:fixed;inset:0;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,0,0,.025) 0,rgba(0,0,0,.025) 4px);pointer-events:none;z-index:9999}.letter-page .container{max-width:1200px;margin:0 auto;padding:0 1rem}.read-progress{position:fixed;top:0;left:0;height:2px;width:100%;transform-origin:0 50%;transform:scaleX(0);background:linear-gradient(90deg,#00ff9d,#00e5ff);box-shadow:0 0 12px rgba(0,255,157,.5);z-index:1001;pointer-events:none}.letter-page .terminal-header{background:rgba(18,26,21,.82);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);padding:.6rem 1rem;display:flex;align-items:center;position:fixed;top:0;width:100%;z-index:1000;border-bottom:1px solid var(--lp-border);transition:border-color var(--lp-transition-fast)}.letter-page .terminal-header:hover{border-bottom-color:var(--lp-border-hover)}.letter-page .terminal-controls{display:flex;gap:.5rem;margin-right:1rem}.letter-page .control{width:12px;height:12px;border-radius:50%;transition:transform var(--lp-transition-fast)}.letter-page .control:hover{transform:scale(1.3)}.letter-page .close{background:#ff5f56;box-shadow:0 0 6px rgba(255,95,86,.4)}.letter-page .minimize{background:#ffbd2e;box-shadow:0 0 6px rgba(255,189,46,.4)}.letter-page .maximize{background:#27c93f;box-shadow:0 0 6px rgba(39,201,63,.4)}.letter-page .terminal-title{color:var(--lp-text-muted);font-size:.85rem;font-family:var(--font-mono);letter-spacing:.5px}.letter-page .terminal-title:after{content:"  — cd ~/home";opacity:0;color:var(--lp-text-dim);transition:opacity var(--lp-transition-fast)}.letter-page .terminal-header:hover .terminal-title:after{opacity:1}.letter-page .hero{height:auto;min-height:100vh;padding:5rem 0 3rem;position:relative;display:flex;align-items:center;justify-content:center}.letter-page .matrix-bg{position:fixed;inset:0;z-index:-1;opacity:.28;pointer-events:none}.letter-page .matrix-bg canvas{display:block;width:100%;height:100%}.letter-page .terminal-window{background:rgba(10,16,13,.88);border:1px solid var(--lp-border);border-radius:var(--lp-radius-lg);padding:3rem;width:95%;max-width:880px;position:relative;z-index:2;box-shadow:var(--lp-glow-lg),0 25px 60px rgba(0,0,0,.5);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);margin:0 auto}.letter-page .terminal-window:before{content:"● ● ●";display:block;font-size:.6rem;letter-spacing:.45em;color:var(--lp-text-muted);opacity:.55;margin-bottom:1.6rem}.letter-page .terminal-output{font-size:1.1rem;line-height:1.8;padding:.4rem}.letter-page .prompt{color:var(--lp-accent);margin-right:.5rem;font-weight:600}.letter-page .letter-title{font-size:clamp(1.8rem,4.5vw,2.6rem);color:var(--lp-white);margin-bottom:.8rem;text-align:center;font-family:var(--font-serif);font-weight:800;letter-spacing:-.02em;line-height:1.2;text-shadow:var(--lp-glow-text)}.letter-page .letter-subtitle{font-size:1rem;color:var(--lp-text-dim);margin-bottom:.8rem;text-align:center;font-family:var(--font-sans);font-weight:300}.letter-page .letter-meta{font-size:.82rem;color:var(--lp-text-muted);text-align:center;margin-bottom:1.6rem;font-family:var(--font-mono);letter-spacing:.5px}.letter-page .letter-meta:after{content:"";display:block;width:60px;height:1px;margin:1.4rem auto 0;background:linear-gradient(90deg,transparent,var(--lp-text),transparent);opacity:.5}.letter-page .letter-content{max-width:720px;margin:0 auto;word-wrap:break-word;text-align:left;font-size:1.1rem;line-height:1.85;color:var(--lp-white-dim);font-family:var(--font-serif);font-weight:400}.letter-page .letter-content p{margin-bottom:1.25rem}.letter-page .letter-content h2,.letter-page .letter-content h3{font-family:var(--font-serif);font-weight:700;color:var(--lp-white);letter-spacing:-.01em;line-height:1.3;margin:2.4rem 0 1rem}.letter-page .letter-content h2{font-size:1.45rem;padding-left:1rem;border-left:3px solid var(--lp-text)}.letter-page .letter-content h3{font-size:1.15rem}.letter-page .letter-content big{font-size:1.18em}.letter-page .letter-content blockquote{margin:1.6rem 0;padding:.4rem 0 .4rem 1.3rem;border-left:3px solid var(--lp-text);background:linear-gradient(90deg,rgba(0,255,157,.05),transparent 70%);border-radius:0 var(--lp-radius-sm) var(--lp-radius-sm) 0;font-style:italic;color:var(--lp-white)}.letter-page .letter-content blockquote p{margin-bottom:.55rem}.letter-page .letter-content blockquote p:last-child{margin-bottom:0}.letter-page .sub-heading{font-family:var(--font-serif);color:var(--lp-white)}.letter-page .highlight_glow{color:var(--lp-text);text-shadow:var(--lp-glow-text);font-weight:600}.letter-page .highlight_underline{font-weight:600;color:var(--lp-white);text-decoration:underline;-webkit-text-decoration-color:var(--lp-text);text-decoration-color:var(--lp-text);text-decoration-thickness:2px;text-underline-offset:4px}.letter-page .highlight_allout{background:linear-gradient(135deg,var(--lp-text),var(--lp-accent));color:#06100b;padding:.15rem .5rem;border-radius:var(--lp-radius-sm);font-weight:700;box-decoration-break:clone;-webkit-box-decoration-break:clone}.letter-page a{color:var(--lp-text);text-decoration:none;transition:all var(--lp-transition-fast)}.letter-page a:hover{color:var(--lp-text-bright)}.letter-page .letter-content a{text-decoration:underline;text-underline-offset:4px;-webkit-text-decoration-color:rgba(0,255,157,.4);text-decoration-color:rgba(0,255,157,.4)}.letter-page .letter-content a:hover{-webkit-text-decoration-color:var(--lp-text-bright);text-decoration-color:var(--lp-text-bright)}.letter-page .highlight_underline a,.letter-page a .highlight_underline{color:var(--lp-white)}.letter-page .letter-nav{display:grid;grid-template-columns:1fr 1fr;grid-gap:.9rem;gap:.9rem;max-width:720px;margin:3rem auto 0;padding-top:2rem;border-top:1px solid var(--lp-border)}.letter-page .letter-nav__card{display:flex;flex-direction:column;gap:.3rem;padding:1rem 1.2rem;border:1px solid var(--lp-border);border-radius:var(--lp-radius-md);background:rgba(255,255,255,.02);transition:border-color var(--lp-transition-fast),background var(--lp-transition-fast),transform var(--lp-transition-fast)}.letter-page .letter-nav__card--next{text-align:right;align-items:flex-end}.letter-page .letter-nav__card:hover{border-color:var(--lp-border-hover);background:rgba(0,255,157,.05);transform:translateY(-2px)}.letter-page .letter-nav__dir{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--lp-text-dim)}.letter-page .letter-nav__title{font-family:var(--font-serif);font-weight:700;font-size:1.02rem;line-height:1.3;color:var(--lp-white);transition:color var(--lp-transition-fast)}.letter-page .letter-nav__card:hover .letter-nav__title{color:var(--lp-text)}.letter-page .letter-nav__file{font-family:var(--font-mono);font-size:.66rem;color:var(--lp-text-muted);opacity:.75;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}@media (max-width:600px){.letter-page .letter-nav{grid-template-columns:1fr}.letter-page .letter-nav__spacer{display:none}.letter-page .letter-nav__card--next{text-align:left;align-items:flex-start}}.letter-page .back-home{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-mono);font-size:.85rem;font-weight:600;color:var(--lp-text)!important;border:1px solid var(--lp-border);border-radius:var(--lp-radius-pill);padding:.65rem 1.5rem;margin:.4rem 0 1.2rem;letter-spacing:.04em;transition:all var(--lp-transition-fast);text-decoration:none!important}.letter-page .back-home:before{content:"←";transition:transform var(--lp-transition-fast)}.letter-page .back-home:hover{border-color:var(--lp-border-hover);background:rgba(0,255,157,.06);box-shadow:var(--lp-glow-sm)}.letter-page .back-home:hover:before{transform:translateX(-3px)}.letter-page .back-home-wrap{text-align:center;margin-bottom:10px}.letter-page .letter-image{margin:2rem 0;text-align:center}.letter-page .featured-image{width:100%;max-width:800px;border-radius:var(--lp-radius-md);border:1px solid var(--lp-border);box-shadow:var(--lp-glow-sm),0 16px 40px rgba(0,0,0,.4);transition:all var(--lp-transition-smooth)}.letter-page .featured-image:hover{box-shadow:var(--lp-glow-md),0 20px 50px rgba(0,0,0,.45);border-color:var(--lp-border-hover);transform:translateY(-3px)}.letter-page .content-image{width:100%;max-width:600px;border-radius:var(--lp-radius-md);border:1px solid var(--lp-border);box-shadow:var(--lp-glow-sm)}.letter-page .image-caption{font-style:italic;color:var(--lp-text-muted);margin-top:10px;font-size:.85rem;font-family:var(--font-sans)}.letter-page .content-image,.letter-page .featured-image{max-width:100%;height:auto}.letter-page footer{padding:2.5rem 0;text-align:center;border-top:1px solid var(--lp-border);color:var(--lp-text-muted);font-size:.85rem;background:rgba(8,13,10,.6)}@media (prefers-reduced-motion:reduce){.letter-page .terminal-window{opacity:1!important;transform:none!important}}@media (max-width:768px){.letter-page .terminal-window{width:95%;padding:2rem;margin:1rem auto}.letter-page .terminal-output{font-size:.95rem}.letter-page .letter-title{font-size:1.5rem;margin-top:1rem}.letter-page .letter-content{font-size:.98rem;line-height:1.8;padding:0 4px}.letter-page .terminal-header{padding:.4rem .8rem}.letter-page .terminal-title{font-size:.75rem}.letter-page .hero{min-height:auto;padding:4rem 0 2rem}}@media (max-width:480px){.letter-page .terminal-window{padding:1.5rem;margin:.5rem auto}.letter-page .letter-title{font-size:1.35rem;margin-top:1rem}.letter-page .letter-subtitle{font-size:.85rem}.letter-page .letter-meta{font-size:.78rem;margin-bottom:1.2rem}.letter-page .letter-content{font-size:.93rem;line-height:1.75}.letter-page .letter-content h2{font-size:1.2rem}.letter-page .terminal-controls{gap:.3rem}.letter-page .control{width:10px;height:10px}.letter-page footer{padding:1.5rem 0;font-size:.8rem}.letter-page .hero{padding-top:3.2rem;padding-bottom:1.5rem}}@media (max-width:600px){.letter-page .letter-content p{margin-bottom:1rem}.letter-page .terminal-window{box-shadow:var(--lp-glow-sm)}.letter-page .letter-image{margin:15px 0}.letter-page .terminal-title{font-size:.72rem;max-width:80%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.letter-page .terminal-title:after{content:""}}@media (min-width:769px) and (max-width:1024px){.letter-page .terminal-window{max-width:90%;padding:2.5rem}}@media (min-width:1600px){.letter-page .letter-content{max-width:780px;font-size:1.12rem}}@media (max-height:500px) and (orientation:landscape){.letter-page .hero{min-height:auto;padding:3.5rem 0 2rem}}