:root{--font-body:Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--max-width:68ch;--radius-md:.75rem;--color-bg:#fff;--color-surface:#fafafa;--color-text:#1c1917;--color-muted:#78716c;--color-primary:#ea580c;--color-primary-dark:#c2410c;--color-border:#0000001a}html[data-theme=dark]{--color-bg:#0c0a09;--color-surface:#1c1917;--color-text:#fafaf9;--color-muted:#a8a29e;--color-primary:#fb923c;--color-primary-dark:#fdba74;--color-border:#ffffff1f}*{box-sizing:border-box}html{scroll-behavior:smooth;font-size:100%}body{font-family:var(--font-body);color:var(--color-text);background-color:var(--color-bg);flex-direction:column;min-height:100vh;margin:0;line-height:1.65;display:flex}a{color:var(--color-primary);text-underline-offset:.2em;transition:color .2s}a:hover{color:var(--color-primary-dark)}h1,h2,h3{letter-spacing:-.02em;margin-block-start:1.5rem;font-weight:700;line-height:1.15}h1{font-size:clamp(1.75rem,4vw,2.5rem)}header{z-index:50;background:var(--color-bg);border-bottom:1px solid var(--color-border);transition:transform .3s;position:sticky;top:0}header.is-hidden{transform:translateY(-100%)}header:after{content:"";background:var(--color-primary);height:2px;display:block}header a{color:var(--color-text);text-decoration:none}.header-main{justify-content:space-between;align-items:center;gap:1rem;padding:.75rem 1.5rem;display:flex}.header-controls{align-items:center;gap:.5rem;display:flex}.brand{letter-spacing:-.02em;font-size:1.25rem;font-weight:700}.theme-toggle{border-radius:var(--radius-md);color:var(--color-text);cursor:pointer;background:0 0;border:none;align-items:center;padding:.5rem;transition:color .2s;display:inline-flex}.theme-toggle:hover{color:var(--color-primary)}.theme-toggle svg{width:1.25rem;height:1.25rem}.menu-toggle{border-radius:var(--radius-md);color:var(--color-text);cursor:pointer;background:0 0;border:none;padding:.5rem;display:none}.menu-toggle .bar{background-color:currentColor;border-radius:.125rem;width:1.25rem;height:.125rem;margin:.25rem 0;display:block}nav ul{flex-wrap:wrap;gap:.25rem;margin:0;padding:0;list-style:none;display:flex}nav a{border-radius:var(--radius-md);padding:.5rem .75rem;font-weight:500;transition:color .2s}nav a:hover,nav a[aria-current=page],nav a[aria-current=page]:hover{color:var(--color-primary);text-underline-offset:.2em;text-decoration:underline}nav a[aria-current=page]{font-weight:700}main{width:100%;max-width:var(--max-width);flex:1;margin:0 auto;padding:2rem 1rem}footer{color:var(--color-muted);text-align:center;border-top:1px solid var(--color-border);margin-top:2rem;padding:1.5rem 1rem;font-size:.9rem}.intro h1{margin:0 0 .5rem}.intro p{color:var(--color-muted);margin:0;font-size:1.1rem}.post-list{margin:0;padding:0;list-style:none}.post-list li{border-bottom:1px solid var(--color-border);padding:.75rem 0}.post-list li:last-child{border-bottom:none}.post-list a{color:var(--color-text);font-weight:600;text-decoration:none}.post-list a:hover{color:var(--color-primary)}.meta{color:var(--color-muted);font-size:.9rem}.video-container{border-radius:var(--radius-md);border:1px solid var(--color-border);height:0;margin:1.5rem 0;padding-bottom:56.25%;position:relative;overflow:hidden}.video-container iframe{width:100%;height:100%;position:absolute;top:0;left:0}.back-to-top{z-index:40;background:var(--color-bg);border:1px solid var(--color-border);width:2.5rem;height:2.5rem;color:var(--color-text);cursor:pointer;opacity:0;pointer-events:none;border-radius:50%;justify-content:center;align-items:center;transition:opacity .3s,transform .3s,color .2s;display:flex;position:fixed;bottom:1.5rem;right:1.5rem;transform:translateY(1rem)}.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}.back-to-top:hover{color:var(--color-primary)}@media (width<=640px){.header-main{flex-wrap:wrap;position:relative}.menu-toggle{display:block}nav{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);z-index:10;padding:1rem;display:none;position:absolute;top:calc(100% + .5rem);left:1rem;right:1rem}nav.open{display:block}nav ul{flex-direction:column;gap:.25rem}}