:root{color-scheme:dark;--bg:#0d1614;--surface:#172520;--ink:#edf8f1;--soft:#a9bcb3;--line:#294038;--green:#7bd5ac;--font:"Aptos","Segoe UI",system-ui,sans-serif}
[data-theme=light]{color-scheme:light;--bg:#f3f8f5;--surface:#fff;--ink:#17302b;--soft:#50685e;--line:#d8e5de;--green:#236e63}
*{box-sizing:border-box}
body{margin:0;min-width:320px;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);transition:background .2s ease,color .2s ease}
main{width:min(820px,100%);margin:0 auto;padding:clamp(28px,7vw,88px) 20px 80px}
header{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;color:var(--ink);font-size:22px;font-weight:760;text-decoration:none;letter-spacing:-.05em}
.brand-mark{position:relative;width:29px;height:29px;display:inline-grid;place-items:center;overflow:hidden;border:1px solid color-mix(in srgb,var(--line) 86%,transparent);border-radius:10px;color:var(--green);background:color-mix(in srgb,var(--surface) 54%,transparent);box-shadow:inset 0 1px 0 color-mix(in srgb,var(--ink) 15%,transparent),0 7px 18px rgba(3,15,11,.1);backdrop-filter:blur(12px) saturate(120%);-webkit-backdrop-filter:blur(12px) saturate(120%)}
.brand-mark::after{content:"";position:absolute;inset:4px;background:currentColor;-webkit-mask:url('/icons/chart-no-axes-combined.svg') center/contain no-repeat;mask:url('/icons/chart-no-axes-combined.svg') center/contain no-repeat}
#theme-toggle,.back{min-height:45px;padding:0 16px;border:1px solid var(--line);border-radius:12px;color:var(--ink);background:var(--surface);font:inherit;cursor:pointer}
#theme-toggle:hover,.back:hover{border-color:var(--green)}
#theme-toggle:focus-visible,.back:focus-visible,a:focus-visible{outline:3px solid color-mix(in srgb,var(--green) 45%,transparent);outline-offset:3px}
h1{margin:60px 0 14px;font-size:clamp(34px,6vw,62px);line-height:1.05;letter-spacing:-.07em}
h1 span{color:var(--green)}
.updated{margin:0 0 40px;color:var(--soft);font-size:13px}
section{padding:25px 0;border-top:1px solid var(--line)}
h2{margin:0 0 10px;font-size:22px;letter-spacing:-.04em}
p{margin:0 0 12px;color:var(--soft)}
ul{margin:10px 0 0;padding-left:22px;color:var(--soft)}
li+li{margin-top:6px}
a{color:var(--green);text-underline-offset:3px}
main a[href^="mailto:"]{display:inline-flex;align-items:center;min-height:44px;margin-block:-9px;padding-block:9px}
.back{display:inline-flex;margin-top:35px;align-items:center;text-decoration:none}
@media(max-width:520px){header{align-items:flex-start}.brand{font-size:20px}#theme-toggle{min-height:44px;padding:0 11px;font-size:13px}h1{margin-top:45px}}
@media(prefers-reduced-motion:reduce){body{transition:none}}