/* SGP Lab blog — shared styles. Dark, flat, technical. */
:root{
  --bg:#000;--bg2:#0a0a0a;--panel:#0e0e0e;--line:#1f1f1f;--line2:#2a2a2a;
  --txt:#ececec;--soft:#c9c9c9;--muted:#8f8f8f;--y:#f5b301;--y2:#ffcc33;
  --sans:-apple-system,BlinkMacSystemFont,"Helvetica Neue",Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"JetBrains Mono",monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img,svg,video{display:block;max-width:100%}
.wrap{width:min(1180px,calc(100% - 40px));margin:0 auto}
.mono{font-family:var(--mono)}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(0,0,0,.92);border-bottom:1px solid var(--line);backdrop-filter:saturate(140%) blur(8px)}
.top .wrap{height:60px;display:flex;align-items:center;gap:26px}
.top .brand img{height:28px;width:auto}
.top nav{display:flex;gap:22px;font-size:14px;color:var(--soft)}
.top nav a{text-decoration:none}.top nav a:hover,.top nav a.on{color:#fff}
.top .shop{margin-left:auto;font-size:13px;font-weight:600;text-decoration:none;border:1px solid var(--line2);padding:7px 12px;border-radius:4px}
.top .shop:hover{border-color:var(--y);color:var(--y)}
@media(max-width:760px){.top nav{display:none}}

/* small labels */
.lbl{font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.lbl b{color:var(--y);font-weight:600}
.crumb{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.crumb a{text-decoration:none}.crumb a:hover{color:#fff}

/* article hero */
.ahero{border-bottom:1px solid var(--line);background:
  linear-gradient(var(--bg),rgba(0,0,0,.6) 60%,var(--bg)),
  repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 32px),
  repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 32px)}
.ahero .wrap>*{min-width:0}
.ahero .wrap{padding:44px 0 36px;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:end}
.ahero h1{font-size:clamp(30px,4.4vw,54px);line-height:1.06;letter-spacing:-.02em;font-weight:750;margin:14px 0 16px}
.ahero .dek{font-size:clamp(16px,1.6vw,19px);color:var(--soft);max-width:640px}
.meta{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:22px;font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.06em}
.meta span b{color:var(--txt);font-weight:500}
.fig{border:1px solid var(--line2);background:var(--panel);border-radius:6px;padding:14px}
.fig figcaption{font-family:var(--mono);font-size:11px;color:var(--muted);margin-top:10px;letter-spacing:.04em}
@media(max-width:900px){.ahero .wrap{grid-template-columns:1fr}}

/* layout */
.alayout{display:grid;grid-template-columns:220px minmax(0,720px);gap:56px;padding:40px 0 20px}
.toc{position:sticky;top:84px;align-self:start;font-size:13px}
.toc ol{list-style:none;margin-top:12px;border-left:1px solid var(--line)}
.toc li a{display:block;padding:5px 0 5px 14px;color:var(--muted);text-decoration:none;margin-left:-1px;border-left:1px solid transparent}
.toc li a:hover,.toc li a.on{color:#fff;border-left-color:var(--y)}
.alayout>*{min-width:0}
@media(max-width:1000px){.alayout{grid-template-columns:minmax(0,1fr);gap:0}.toc{display:none}}

/* prose */
.prose{font-size:17.5px;color:var(--soft)}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:26px;line-height:1.2;color:#fff;letter-spacing:-.01em;margin-top:2.2em;scroll-margin-top:80px;display:flex;gap:14px;align-items:baseline}
.prose h2 .n{font-family:var(--mono);font-size:13px;color:var(--y);letter-spacing:.08em;font-weight:500;flex:none}
.prose h3{font-size:19px;color:#fff;margin-top:1.6em}
.prose strong{color:#fff;font-weight:600}
.prose a{color:var(--y);text-decoration:underline;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.25em}
.prose li+li{margin-top:.4em}
.prose code{font-family:var(--mono);font-size:.86em;background:#151515;border:1px solid var(--line2);padding:1px 5px;border-radius:3px;color:#eee}
.lead{font-size:19px;color:var(--txt)}
.note{border-left:3px solid var(--y);background:var(--bg2);padding:14px 18px;font-size:16px}
.note .lbl{display:block;margin-bottom:4px;color:var(--y)}
.warn{border-left-color:#e5534b}.warn .lbl{color:#e5534b}

/* code block */
.code{position:relative;background:#0b0b0b;border:1px solid var(--line2);border-radius:6px;overflow:hidden}
.code .bar{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;border-bottom:1px solid var(--line2);font-family:var(--mono);font-size:11.5px;color:var(--muted);letter-spacing:.06em}
.code button{font:inherit;color:var(--muted);background:none;border:1px solid var(--line2);border-radius:3px;padding:2px 8px;cursor:pointer}
.code button:hover{color:#fff;border-color:#555}
.code pre{margin:0;padding:16px;overflow:auto;font-family:var(--mono);font-size:13.5px;line-height:1.6;color:#d6d6d6}
.code .c{color:#6f6f6f}.code .k{color:var(--y)}.code .s{color:#9bd28f}.code .n{color:#8fb8ff}

/* tables */
.tbl{width:100%;border-collapse:collapse;font-size:15px}
.tbl th,.tbl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
.tbl th{font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:500;border-bottom-color:var(--line2)}
.tbl td:first-child{color:#fff}
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:6px}

/* steps */
.steps{list-style:none;padding:0!important;counter-reset:s}
.steps li{counter-increment:s;position:relative;padding:14px 0 14px 54px;border-top:1px solid var(--line)}
.steps li:last-child{border-bottom:1px solid var(--line)}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:0;top:14px;font-family:var(--mono);font-size:14px;color:var(--y)}
.steps li b{color:#fff}

/* faq */
.faq details{border-top:1px solid var(--line);padding:14px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;color:#fff;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--y)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin-top:8px}

/* product box */
.kit{margin-top:2.4em;border:1px solid var(--line2);border-radius:6px;display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;padding:20px 22px;background:var(--bg2)}
.kit .lbl{color:var(--y)}
.kit h3{margin:4px 0 6px!important;font-size:20px}
.kit p{font-size:15px;margin:0!important}
.kit .go{display:inline-block;background:var(--y);color:#000;font-weight:700;text-decoration:none;padding:12px 18px;border-radius:4px;font-size:15px;white-space:nowrap}
.kit .go:hover{background:var(--y2)}
@media(max-width:620px){.kit{grid-template-columns:1fr}}

/* author */
.author{margin-top:2.4em;padding-top:18px;border-top:1px solid var(--line);font-size:14.5px;color:var(--muted)}
.author b{color:#fff}

/* related + index cards */
.related{border-top:1px solid var(--line);margin-top:40px;padding:34px 0 10px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:6px;overflow:hidden;margin-top:16px}
.post{background:var(--bg);padding:22px 22px 24px;text-decoration:none;display:flex;flex-direction:column;gap:10px;min-height:220px;transition:background .15s}
.post:hover{background:#0c0c0c}
.post h3{font-size:19px;line-height:1.25;color:#fff;letter-spacing:-.01em}
.post p{font-size:14.5px;color:var(--muted);line-height:1.5}
.post .foot{margin-top:auto;font-family:var(--mono);font-size:11.5px;color:var(--muted);letter-spacing:.08em;display:flex;justify-content:space-between}
.post:hover h3{color:var(--y)}
.post.soon{cursor:default}.post.soon h3{color:#7a7a7a}.post.soon:hover h3{color:#7a7a7a}
@media(max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid{grid-template-columns:1fr}}

/* blog index hero */
.bhero{border-bottom:1px solid var(--line);background:
  repeating-linear-gradient(0deg,rgba(255,255,255,.03) 0 1px,transparent 1px 32px),
  repeating-linear-gradient(90deg,rgba(255,255,255,.03) 0 1px,transparent 1px 32px)}
.bhero .wrap{padding:60px 0 46px}
.bhero h1{font-size:clamp(36px,6vw,72px);line-height:1;letter-spacing:-.03em;font-weight:800;margin:14px 0 18px}
.bhero h1 em{font-style:normal;color:var(--y)}
.bhero p{font-size:clamp(16px,1.7vw,20px);color:var(--soft);max-width:680px}
.cats{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.cats a{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;text-decoration:none;border:1px solid var(--line2);padding:7px 11px;border-radius:3px;color:var(--soft)}
.cats a:hover,.cats a.on{border-color:var(--y);color:var(--y)}
.feat{display:grid;grid-template-columns:1.2fr 1fr;gap:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;margin-top:36px;text-decoration:none}
.feat .art{background:var(--panel);border-right:1px solid var(--line);display:grid;place-items:center;padding:24px;min-height:300px}
.feat .txt{padding:30px;display:flex;flex-direction:column;gap:12px}
.feat h2{font-size:clamp(24px,2.8vw,34px);line-height:1.12;letter-spacing:-.02em;color:#fff}
.feat:hover h2{color:var(--y)}
.feat p{color:var(--soft)}
@media(max-width:820px){.feat{grid-template-columns:1fr}.feat .art{border-right:0;border-bottom:1px solid var(--line)}}

/* store strip + footer */
.strip{margin:56px 0 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.strip .wrap{padding:22px 0;display:flex;gap:18px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.strip p{color:var(--soft);font-size:15px}
.strip a{color:var(--y);font-weight:600;text-decoration:none}
.foot{color:var(--muted)}
footer.site{padding:28px 0 44px;font-size:13px;color:var(--muted)}
footer.site .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer.site nav{display:flex;gap:16px;flex-wrap:wrap}
footer.site a{text-decoration:none}footer.site a:hover{color:#fff}

/* svg figure helpers */
.svgfig text{font-family:var(--mono)}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}

/* youtube embed facade (click to load, fast + privacy) */
.ytembed{position:relative;aspect-ratio:16/9;border-radius:6px;overflow:hidden;background:#000;cursor:pointer;border:1px solid var(--line2)}
.ytembed img{width:100%;height:100%;object-fit:cover;opacity:.82;transition:opacity .2s}
.ytembed:hover img{opacity:1}
.ytembed .ytplay{position:absolute;inset:0;display:grid;place-items:center;border:0;background:none;cursor:pointer}
.ytembed .ytplay i{width:64px;height:46px;border-radius:12px;background:rgba(245,179,1,.95);display:grid;place-items:center;box-shadow:0 8px 28px rgba(0,0,0,.55)}
.ytembed .ytplay svg{width:24px;height:24px;fill:#111;margin-left:3px}
.ytembed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.ytembed .badge{position:absolute;left:10px;bottom:10px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:#fff;background:rgba(0,0,0,.65);padding:3px 8px;border-radius:3px;pointer-events:none}
.photo{border:1px solid var(--line2);border-radius:6px;overflow:hidden;background:var(--panel)}
.photo img{width:100%;height:auto;display:block}