/* SMneg landing page. Copyright 2026 Said Mrigua. Apache-2.0 */
@font-face{font-family:Inter;font-weight:400;font-display:swap;src:url(../fonts/inter-400.woff2) format("woff2")}
@font-face{font-family:Inter;font-weight:600;font-display:swap;src:url(../fonts/inter-600.woff2) format("woff2")}
@font-face{font-family:Inter;font-weight:700;font-display:swap;src:url(../fonts/inter-700.woff2) format("woff2")}
@font-face{font-family:"Plex Mono";font-weight:400;font-display:swap;src:url(../fonts/plexmono-400.woff2) format("woff2")}
@font-face{font-family:"Plex Mono";font-weight:500;font-display:swap;src:url(../fonts/plexmono-500.woff2) format("woff2")}

:root{
  --bg:#0c0c0c;--bg2:#121212;--line:#262626;--line2:#333;
  --fg:#f2efe9;--fg2:#c9c4bb;--fg3:#8d887f;--accent:#e3974a;
  --cy:#36c5d8;--ma:#d9509f;--ye:#e6c23a;
  --r:14px;--wrap:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{background:var(--bg);color:var(--fg);font:400 17px/1.6 Inter,system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.mono{font-family:"Plex Mono",ui-monospace,Menlo,monospace;letter-spacing:.12em;text-transform:uppercase}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.skip{position:absolute;left:-999px;top:8px;background:var(--fg);color:#000;padding:8px 14px;border-radius:8px;z-index:50}
.skip:focus{left:12px}
section{padding:110px 0}
h1,h2,h3{font-weight:700;letter-spacing:-.03em;line-height:1.05}
h2{font-size:clamp(34px,4.4vw,56px);max-width:16ch}
h3{font-size:22px;letter-spacing:-.015em;line-height:1.2}
.label{font-size:13px;color:var(--accent);margin-bottom:14px}
.small{font-size:14px;color:var(--fg3);line-height:1.5}
code{font-family:"Plex Mono",ui-monospace,Menlo,monospace;font-size:.86em;background:#1b1b1b;border:1px solid #2a2a2a;border-radius:5px;padding:1px 6px}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(12,12,12,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid #1d1d1d}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:19px;letter-spacing:-.02em}
.brand .ver{font-size:12px;color:var(--fg3);font-weight:400}
.nav nav{display:flex;gap:26px;font-size:15px}
.nav nav a{text-decoration:none;color:var(--fg2)}
.nav nav a:hover{color:var(--fg)}
.nav .gh{color:var(--fg)!important;border:1px solid var(--line2);padding:6px 14px;border-radius:999px}

/* hero */
.hero{padding:72px 0 90px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-20% -10% auto auto;width:720px;height:720px;
  background:radial-gradient(closest-side,rgba(227,151,74,.13),transparent);pointer-events:none}
.hero-in{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center}
.kicker{font-size:13px;color:var(--fg2);display:flex;align-items:center;gap:10px;margin-bottom:22px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(227,151,74,.2)}
h1{font-size:clamp(48px,7.4vw,96px)}
.lead{font-size:clamp(18px,1.6vw,21px);color:var(--fg2);margin-top:24px;max-width:34em}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.btn{display:inline-flex;align-items:center;gap:12px;text-decoration:none;border-radius:12px;padding:12px 18px 12px 16px;
  border:1px solid var(--line2);background:#161616;transition:background .15s,border-color .15s,transform .15s}
.btn svg{width:22px;height:22px;fill:currentColor;flex:none}
.btn span{display:flex;flex-direction:column;line-height:1.25}
.btn b{font-weight:600;font-size:16px}
.btn small{font-size:12.5px;color:var(--fg3)}
.btn:hover{border-color:#4a4a4a;background:#1c1c1c;transform:translateY(-1px)}
.btn.primary{background:var(--fg);color:#111;border-color:var(--fg)}
.btn.primary small{color:#55524d}
.btn.primary:hover{background:#fff}
.btn.ghost{background:transparent}
.btn.sm{padding:9px 16px;font-size:15px;font-weight:600;margin-top:auto;align-self:flex-start}
.note{font-size:14px;color:var(--fg3);margin-top:18px;max-width:44em}
.note a{color:var(--fg2)}
.hero-img{position:relative}
.hero-img img{border-radius:var(--r);box-shadow:0 0 0 1px #2a2a2a,0 40px 90px rgba(0,0,0,.6)}
.hero-img figcaption{font-size:11.5px;color:var(--fg3);margin-top:14px;letter-spacing:.08em}

/* before / after */
.ba-sec{padding-top:40px}
.sub2{color:var(--fg2);margin-top:14px;font-size:17px}
.ba-stage{margin-top:32px;display:flex;justify-content:center}
.ba{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:0 0 0 1px #2a2a2a;aspect-ratio:var(--ar);width:min(100%,calc(64vh * (var(--ar))));user-select:none;background:#151515}
.ba img{width:100%;height:100%;object-fit:cover}
.ba-neg{position:absolute;inset:0;clip-path:inset(0 calc(100% - var(--pos)) 0 0)}
.ba-line{position:absolute;top:0;bottom:0;left:var(--pos);width:2px;margin-left:-1px;background:var(--fg);pointer-events:none}
.ba-line span{position:absolute;top:50%;left:50%;width:44px;height:44px;margin:-22px 0 0 -22px;border-radius:50%;
  background:var(--fg);box-shadow:0 4px 18px rgba(0,0,0,.5)}
.ba-line span::before{content:"‹ ›";position:absolute;inset:0;display:grid;place-items:center;color:#111;font-weight:700;font-size:18px;letter-spacing:2px}
.ba-range{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}
.ba-range:focus-visible + *{outline:none}
.ba:has(.ba-range:focus-visible){outline:2px solid var(--accent);outline-offset:3px}
.tag{position:absolute;top:16px;font-size:12px;padding:7px 12px;background:rgba(10,10,10,.72);border-radius:6px;pointer-events:none}
.tag.l{left:16px}.tag.r{right:16px}
.ba-sec .small{margin-top:18px}
.ba-bar{display:flex;align-items:center;gap:12px;margin-top:18px}
#ba-count{font-size:13px;color:var(--fg2);min-width:74px;text-align:center}
.ba-title{margin-left:8px;color:var(--fg2);font-size:16px}
.ba-thumbs{list-style:none;display:flex;gap:10px;margin-top:16px;overflow-x:auto;scrollbar-width:none;padding:4px 2px}
.ba-thumbs::-webkit-scrollbar{display:none}
.ba-thumbs li{flex:none}
.ba-t{all:unset;cursor:pointer;display:block;border-radius:8px;opacity:.5;transition:opacity .15s;box-shadow:0 0 0 1px #2a2a2a}
.ba-t img{width:80px;height:80px;border-radius:8px;object-fit:cover}
.ba-t:hover{opacity:.85}
.ba-t[aria-current="true"]{opacity:1;box-shadow:0 0 0 2px var(--accent)}
.ba-t:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* features */
.grid4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:44px}
.feat{border-top:1px solid var(--line);padding-top:22px}
.feat .k{font-size:12px;color:var(--fg3)}
.feat h3{margin:10px 0 8px}
.feat p{color:var(--fg2);font-size:16px}

/* demo video */
.demo-sec{padding-top:40px}
.demo{margin-top:36px}
.demo{display:flex;flex-direction:column;align-items:center}
.demo video{display:block;width:min(100%,calc(80vh * 1280 / 876));height:auto;aspect-ratio:1280/876;border-radius:var(--r);background:#0c0c0c;
  box-shadow:0 0 0 1px #2a2a2a,0 40px 90px rgba(0,0,0,.55)}
.demo figcaption{margin-top:14px;max-width:62em;align-self:flex-start}

/* tutorial */
.tut-sec{background:linear-gradient(#0c0c0c,#101010 30%,#0c0c0c)}
.tut{display:grid;grid-template-columns:minmax(260px,1fr) 520px;gap:56px;margin-top:44px;align-items:start}
.tut-list{list-style:none;counter-reset:none;position:sticky;top:96px}
.tut-list button{all:unset;box-sizing:border-box;cursor:pointer;display:flex;gap:18px;align-items:baseline;width:100%;
  padding:13px 4px;border-top:1px solid var(--line);color:var(--fg3);transition:color .15s}
.tut-list li:last-child button{border-bottom:1px solid var(--line)}
.tut-list .n{font-size:12px;width:26px;flex:none}
.tut-list .tt{font-size:18px;font-weight:600;letter-spacing:-.01em}
.tut-list button:hover{color:var(--fg2)}
.tut-list button[aria-current="true"]{color:var(--fg)}
.tut-list button[aria-current="true"] .n{color:var(--accent)}
.tut-list button:focus-visible{outline:2px solid var(--accent)}
.tut-view{min-width:0}
.tut-track{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;border-radius:var(--r);
  box-shadow:0 0 0 1px #2a2a2a,0 40px 90px rgba(0,0,0,.55);background:#0c0c0c;overscroll-behavior-x:contain}
.tut-track::-webkit-scrollbar{display:none}
.slide{flex:0 0 100%;scroll-snap-align:start;scroll-snap-stop:always;cursor:zoom-in}
.slide img{width:100%;aspect-ratio:4/5}
.tut-ctrl{display:flex;align-items:center;gap:12px;margin-top:16px}
#tut-count{font-size:13px;color:var(--fg2);min-width:74px;text-align:center}
.ib{all:unset;box-sizing:border-box;cursor:pointer;display:grid;place-items:center;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line2);color:var(--fg);font-size:18px;transition:background .15s}
.ib:hover{background:#1c1c1c}.ib:focus-visible{outline:2px solid var(--accent)}
.ib.wide{width:auto;padding:0 18px;border-radius:999px;font-size:14px;margin-left:auto}
.ib[disabled]{opacity:.35;cursor:default}

/* install */
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:44px}
.card{display:flex;flex-direction:column;gap:14px;background:var(--bg2);border:1px solid #232323;border-radius:var(--r);padding:28px}
.req{font-size:12px;color:var(--accent);letter-spacing:.08em}
.card ol{padding-left:20px;color:var(--fg2);font-size:15.5px;display:grid;gap:8px}
.card b{color:var(--fg);font-weight:600}
pre{background:#0a0a0a;border:1px solid #232323;border-radius:10px;padding:14px 16px;overflow-x:auto}
pre code{background:none;border:0;padding:0;font-size:13px;line-height:1.7;color:var(--fg2)}

/* footer */
.foot{border-top:1px solid #1d1d1d;padding:44px 0 56px}
.foot-in{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;font-size:15px;color:var(--fg2)}
.foot nav{display:flex;gap:22px;flex-wrap:wrap}
.foot nav a{color:var(--fg2);text-decoration:none}.foot nav a:hover{color:var(--fg)}

/* lightbox */
.lb{border:0;padding:0;background:transparent;max-width:none;max-height:none;width:100vw;height:100vh;height:100dvh;color:var(--fg)}
.lb::backdrop{background:rgba(0,0,0,.92)}
.lb[open]{display:grid;place-items:center}
.lb img{max-width:min(94vw,860px);max-height:92dvh;width:auto;height:auto;border-radius:8px}
.lb .ib{position:fixed;background:rgba(20,20,20,.8)}
.lb-x{top:16px;right:16px}.lb-p{left:16px;top:50%}.lb-n{right:16px;top:50%}

/* responsive */
@media (max-width:1000px){
  .hero-in{grid-template-columns:1fr;gap:48px}
  .hero-img{max-width:520px}
  .grid4{grid-template-columns:repeat(2,1fr);row-gap:30px}
  .grid3{grid-template-columns:minmax(0,1fr)}
  .tut{grid-template-columns:minmax(0,1fr);gap:26px}
  .tut > *{min-width:0}
  .tut-list{position:static;display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;order:2;padding-bottom:4px}
  .tut-list::-webkit-scrollbar{display:none}
  .tut-list li{flex:none}
  .tut-list button,.tut-list li:last-child button{border:1px solid var(--line);border-radius:999px;padding:8px 14px;gap:8px;width:auto}
  .tut-list .tt{font-size:14px;white-space:nowrap}
  .tut-list .n{width:auto}
  .tut-view{max-width:560px;width:100%}
}
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 20px}
  section{padding:76px 0}
  .hero{padding:44px 0 64px}
  .nav nav{gap:16px;font-size:14px}
  .nav nav a:not(.gh):not([href="#tutorial"]):not([href="#demo"]){display:none}
  .cta{flex-direction:column}
  .btn{width:100%}
  .grid4{grid-template-columns:minmax(0,1fr)}
  .ba-title{display:none}
  .ba-t img{width:64px;height:64px}
  .tag{top:10px;font-size:10.5px}.tag.l{left:10px}.tag.r{right:10px}
  .lb-p,.lb-n{top:auto;bottom:18px}
}