/* ════════════════════════════════════════════════════════════════════════
   Stenuero v3 — "Spectrum Burst"
   Dark canvas · giant typography · vivid color bursts · real app mockups.
   Pure static CSS; no build step.
   ════════════════════════════════════════════════════════════════════════ */
:root{
  --bg:#08080d; --text:#f4f5f7; --muted:#a8aebc; --faint:#6e7585;
  --cyan:#06b6d4; --violet:#8b5cf6; --magenta:#ec4899; --amber:#f59e0b;
  --green:#22c55e; --blue:#3b82f6;
  --border:rgba(255,255,255,.08); --border-2:rgba(255,255,255,.16);
  --panel:rgba(18,20,30,.72);
  --font:'Inter',system-ui,sans-serif;
  --display:'Space Grotesk',var(--font);
  --grad:linear-gradient(100deg,var(--cyan),var(--violet) 45%,var(--magenta) 80%,var(--amber));
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);font-family:var(--font);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.6;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
i,em{font-style:normal}
::selection{background:var(--violet);color:#fff}

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;border-radius:14px;
  transition:transform .25s cubic-bezier(.2,.9,.3,1.4),box-shadow .25s,background .25s;white-space:nowrap}
.btn-primary{background:var(--grad);background-size:200% 100%;color:#fff;
  box-shadow:0 4px 24px rgba(139,92,246,.35)}
.btn-primary:hover{transform:translateY(-2px) scale(1.03);box-shadow:0 8px 36px rgba(236,72,153,.45);
  background-position:100% 0}
.btn-ghost{border:1px solid var(--border-2);color:var(--muted)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--text);transform:translateY(-2px)}
.btn-nav{padding:9px 20px;font-size:14px}
.btn-lg{padding:15px 32px;font-size:16px}
.btn-xl{padding:20px 48px;font-size:19px;border-radius:18px}

/* ── Nav ─────────────────────────────────────────────────────────────── */
.nav{position:fixed;inset:0 0 auto;z-index:50;display:flex;align-items:center;gap:32px;
  padding:14px max(4vw,20px);transition:background .3s,backdrop-filter .3s,border-color .3s;
  border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(8,8,13,.75);backdrop-filter:blur(16px);border-color:var(--border)}
.brand{font-family:var(--display);font-weight:700;letter-spacing:.18em;font-size:15px;
  display:flex;align-items:center;gap:10px}
.brand-dot{width:14px;height:14px;border-radius:5px;background:var(--grad);
  box-shadow:0 0 14px rgba(139,92,246,.8)}
.nav-links{display:flex;gap:26px;margin-left:auto}
.nav-links a{font-size:14px;color:var(--muted);letter-spacing:.04em;transition:color .2s}
.nav-links a:hover{color:var(--text)}

/* ── Reveal ──────────────────────────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ── Hero ────────────────────────────────────────────────────────────── */
.hero{position:relative;padding:140px 4vw 60px;text-align:center;overflow:visible}
.bursts{position:absolute;inset:-20% -10% auto;height:130%;pointer-events:none;z-index:-1;
  filter:blur(70px) saturate(1.35);opacity:.85}
.burst{position:absolute;border-radius:50%;mix-blend-mode:screen;will-change:transform}
.b-cyan{width:44vw;height:44vw;left:2%;top:8%;background:radial-gradient(circle,rgba(6,182,212,.55),transparent 65%);
  animation:drift1 16s ease-in-out infinite alternate}
.b-violet{width:50vw;height:50vw;right:0;top:0;background:radial-gradient(circle,rgba(139,92,246,.5),transparent 65%);
  animation:drift2 19s ease-in-out infinite alternate}
.b-magenta{width:34vw;height:34vw;left:32%;top:34%;background:radial-gradient(circle,rgba(236,72,153,.42),transparent 65%);
  animation:drift3 14s ease-in-out infinite alternate}
.b-amber{width:26vw;height:26vw;right:18%;top:46%;background:radial-gradient(circle,rgba(245,158,11,.34),transparent 65%);
  animation:drift1 22s ease-in-out infinite alternate-reverse}
@keyframes drift1{from{transform:translate(0,0) scale(1)}to{transform:translate(6vw,4vh) scale(1.15)}}
@keyframes drift2{from{transform:translate(0,0) scale(1.1)}to{transform:translate(-5vw,6vh) scale(.95)}}
@keyframes drift3{from{transform:translate(0,0)}to{transform:translate(4vw,-5vh) scale(1.2)}}

.hero-inner{max-width:1100px;margin:0 auto}
.hero-kicker{font-family:var(--display);font-size:13px;letter-spacing:.34em;color:var(--faint);margin-bottom:26px}
.hero-title{font-family:var(--display);font-weight:700;line-height:.98;
  font-size:clamp(44px,8.4vw,118px);letter-spacing:-.015em}
.hero-title .line{display:block}
.line-grad{background:var(--grad);background-size:300% 100%;-webkit-background-clip:text;background-clip:text;
  color:transparent;animation:gradslide 7s ease-in-out infinite alternate}
@keyframes gradslide{from{background-position:0% 0}to{background-position:100% 0}}
.hero-sub{max-width:620px;margin:30px auto 0;color:var(--muted);font-size:clamp(15px,1.6vw,18px)}
.hero-cta{display:flex;gap:16px;justify-content:center;margin-top:38px;flex-wrap:wrap}

/* ── Mock windows (shared) ───────────────────────────────────────────── */
.window{background:#0B0D14;border:1px solid var(--border-2);border-radius:16px;overflow:hidden;
  box-shadow:0 30px 80px rgba(0,0,0,.6);text-align:left;font-size:13px}
.win-bar{display:flex;align-items:center;gap:7px;padding:10px 14px;background:rgba(255,255,255,.04);
  border-bottom:1px solid var(--border)}
.win-bar i{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.14)}
.win-bar i:first-child{background:#f87171}.win-bar i:nth-child(2){background:#fbbf24}.win-bar i:nth-child(3){background:#34d399}
.win-title{margin-left:8px;font-size:11px;color:var(--faint);letter-spacing:.06em}

/* hero SteLink mockup */
.hero-shot{position:relative;max-width:980px;margin:70px auto 0;perspective:1400px}
.win-stelink{transform:rotateX(8deg);transform-origin:top;transition:transform .4s ease}
.hero-shot:hover .win-stelink{transform:rotateX(3deg)}
.shot-glow{position:absolute;inset:8% -6% -12%;z-index:-1;filter:blur(60px);opacity:.55;
  background:radial-gradient(60% 70% at 35% 50%,rgba(6,182,212,.5),transparent 70%),
             radial-gradient(60% 70% at 70% 60%,rgba(139,92,246,.5),transparent 70%)}
.sl-body{display:grid;grid-template-columns:54px 188px 1fr;min-height:380px}
.sl-rail{display:flex;flex-direction:column;align-items:center;gap:10px;padding:12px 0;
  background:rgba(15,17,26,.9);border-right:1px solid var(--border)}
.sl-logo{width:34px;height:34px;border-radius:11px;background:var(--grad);display:grid;place-items:center;
  font-family:var(--display);font-weight:700;color:#fff}
.sl-space{width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.08);transition:border-radius .2s}
.sl-space.active{border-radius:11px;background:linear-gradient(135deg,#06b6d4,#3b82f6);outline:2px solid rgba(255,255,255,.25)}
.sl-space.s2{background:linear-gradient(135deg,#ec4899,#f59e0b)}
.sl-space.s3{background:linear-gradient(135deg,#22c55e,#06b6d4)}
.sl-plus{width:34px;height:34px;border-radius:50%;border:1px dashed var(--border-2);display:grid;place-items:center;color:var(--green)}
.sl-chans{background:rgba(22,24,34,.55);border-right:1px solid var(--border);padding:14px 10px}
.sl-team{font-family:var(--display);font-weight:600;font-size:12px;letter-spacing:.1em;padding:0 8px 12px;
  border-bottom:1px solid var(--border);margin-bottom:10px}
.sl-cat{font-size:9px;letter-spacing:.16em;color:var(--faint);padding:10px 8px 4px}
.sl-chan{display:flex;align-items:center;gap:6px;padding:6px 8px;border-radius:8px;color:var(--muted);font-size:12px}
.sl-chan.active{background:rgba(6,182,212,.14);color:var(--text)}
.sl-chan .pin{margin-left:auto;font-size:10px}
.sl-chan .unread{margin-left:auto;background:var(--magenta);color:#fff;font-size:9px;font-weight:700;
  border-radius:8px;padding:1px 6px}
.sl-chan .live{margin-left:auto;background:rgba(34,197,94,.18);color:var(--green);font-size:8px;font-weight:700;
  letter-spacing:.1em;border-radius:6px;padding:2px 5px;animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.5}}
.sl-chat{display:flex;flex-direction:column}
.sl-head{display:flex;justify-content:space-between;align-items:center;padding:11px 16px;border-bottom:1px solid var(--border)}
.sl-head-ic{color:var(--faint);font-size:12px}
.sl-msgs{flex:1;padding:14px 16px;display:flex;flex-direction:column;gap:13px}
.sl-msg{display:flex;gap:10px}
.av{flex:0 0 30px;height:30px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:12px;color:#fff}
.a1{background:linear-gradient(135deg,#06b6d4,#3b82f6)}
.a2{background:linear-gradient(135deg,#8b5cf6,#ec4899)}
.a3{background:linear-gradient(135deg,#f59e0b,#ec4899)}
.sl-msg b{font-size:12.5px}
.sl-msg b em{color:var(--faint);font-weight:400;font-size:10px;margin-left:6px}
.sl-msg p{color:var(--muted);font-size:12.5px;margin-top:1px}
.reacts{display:inline-block;margin-top:5px;background:rgba(255,255,255,.06);border:1px solid var(--border);
  border-radius:9px;padding:2px 8px;font-size:10.5px}
.sl-poll{margin-top:6px;background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:11px;
  padding:10px 12px;min-width:220px}
.sl-poll>b{font-size:12px}
.sl-opt{position:relative;margin-top:7px;height:24px;border-radius:7px;background:rgba(255,255,255,.05);
  overflow:hidden;display:flex;align-items:center;font-size:10.5px}
.sl-opt i{position:absolute;inset:0 auto 0 0;background:linear-gradient(90deg,rgba(6,182,212,.4),rgba(139,92,246,.4))}
.sl-opt span{position:relative;padding-left:9px}
.sl-opt em{position:relative;margin-left:auto;padding-right:9px;color:var(--muted)}
.sl-new{animation:msgIn .6s cubic-bezier(.2,.9,.3,1.2) both;animation-delay:1.2s}
@keyframes msgIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.sl-typing{padding:0 16px 6px;color:var(--faint);font-size:11px;display:flex;align-items:center}
.sl-typing span{width:5px;height:5px;border-radius:50%;background:var(--cyan);margin-right:3px;
  animation:blink 1.2s infinite}
.sl-typing span:nth-child(2){animation-delay:.2s}.sl-typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%{opacity:.25}40%{opacity:1}}
.sl-compose{margin:0 14px 14px;padding:10px 14px;border:1px solid var(--border-2);border-radius:12px;
  color:var(--faint);font-size:12px;display:flex;align-items:center;background:rgba(255,255,255,.03)}
.sl-emoji{margin-left:auto}

/* ── Marquee ─────────────────────────────────────────────────────────── */
.marquee{overflow:hidden;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  padding:16px 0;margin-top:90px;background:rgba(255,255,255,.02)}
.marquee-track{display:flex;width:max-content;animation:scroll 36s linear infinite}
.marquee-track span{font-family:var(--display);font-size:13px;letter-spacing:.3em;color:var(--faint);white-space:nowrap}
@keyframes scroll{to{transform:translateX(-50%)}}

/* ── Apps ────────────────────────────────────────────────────────────── */
.apps{padding:120px 4vw 40px;max-width:1180px;margin:0 auto}
.sec-title{font-family:var(--display);font-weight:700;font-size:clamp(34px,5.6vw,68px);
  line-height:1.02;letter-spacing:-.01em;text-align:center;margin-bottom:30px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.app-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:80px 0}
.app-row.flip .app-copy{order:2}
.app-tag{font-family:var(--display);font-size:11px;letter-spacing:.28em;color:var(--c,--cyan);
  border:1px solid color-mix(in srgb,var(--c) 40%,transparent);border-radius:8px;padding:4px 12px}
.app-copy h3{font-family:var(--display);font-size:clamp(30px,3.6vw,46px);font-weight:700;margin:18px 0 14px}
.app-copy p{color:var(--muted);font-size:15.5px;max-width:480px}
.ticks{margin-top:22px;display:grid;gap:9px}
.ticks li{color:var(--muted);font-size:14px;padding-left:26px;position:relative}
.ticks li::before{content:"✓";position:absolute;left:0;color:var(--cyan);font-weight:700}
.app-visual{position:relative}
.mini-burst{position:absolute;inset:-18%;z-index:-1;filter:blur(55px);opacity:.5;pointer-events:none;
  background:radial-gradient(50% 55% at 30% 40%,color-mix(in srgb,var(--c1) 55%,transparent),transparent 70%),
             radial-gradient(50% 55% at 72% 65%,color-mix(in srgb,var(--c2) 45%,transparent),transparent 70%)}
.win-sm{transform:rotate(-1.6deg);transition:transform .35s ease}
.flip .win-sm{transform:rotate(1.6deg)}
.app-visual:hover .win-sm{transform:rotate(0) scale(1.02)}

/* DM mockup */
.dm-body{padding:18px;display:flex;flex-direction:column;gap:10px}
.dm-lock{align-self:center;font-size:10.5px;color:var(--green);background:rgba(34,197,94,.1);
  border:1px solid rgba(34,197,94,.25);border-radius:9px;padding:3px 12px}
.dm-msg{max-width:75%;padding:9px 14px;border-radius:14px;font-size:13px}
.dm-msg.them{background:rgba(255,255,255,.07);align-self:flex-start;border-bottom-left-radius:4px}
.dm-msg.me{background:linear-gradient(135deg,#06b6d4,#8b5cf6);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.dm-msg.disappearing{border:1px dashed rgba(255,255,255,.25);opacity:.8}
.dm-call{margin-top:6px;display:flex;align-items:center;gap:9px;background:rgba(34,197,94,.08);
  border:1px solid rgba(34,197,94,.22);border-radius:12px;padding:10px 14px;font-size:12px;color:var(--muted)}
.dm-call-dot{width:9px;height:9px;border-radius:50%;background:var(--green);animation:pulse 1.6s infinite}

/* Library mockup */
.lib-body{display:grid;grid-template-columns:118px 1fr;min-height:200px}
.lib-side{border-right:1px solid var(--border);padding:14px 10px;display:flex;flex-direction:column;gap:8px;
  font-size:12px;color:var(--muted)}
.lib-side .on{background:rgba(245,158,11,.13);color:var(--text);border-radius:8px;padding:6px 9px}
.lib-side span:not(.on){padding:6px 9px}
.lib-main{padding:14px;display:flex;flex-direction:column;gap:11px}
.lib-card{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.04);border:1px solid var(--border);
  border-radius:13px;padding:11px 13px}
.lib-ic{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-family:var(--display);
  font-weight:700;font-size:12px;color:#fff;background:linear-gradient(135deg,var(--c1),var(--c2))}
.lib-tx{display:flex;flex-direction:column}
.lib-tx b{font-size:13px}
.lib-tx em{font-size:11px;color:var(--faint)}
.lib-run{margin-left:auto;background:linear-gradient(135deg,#06b6d4,#3b82f6);color:#fff;font-size:11px;
  font-weight:700;border-radius:9px;padding:6px 13px}
.lib-up{margin-left:auto;border:1px solid var(--border-2);color:var(--muted);font-size:11px;
  border-radius:9px;padding:6px 13px}

/* Agent mockup */
.ag-body{padding:18px;display:flex;flex-direction:column;gap:12px}
.ag-q{align-self:flex-end;background:rgba(255,255,255,.08);border-radius:13px;border-bottom-right-radius:4px;
  padding:9px 14px;font-size:13px}
.ag-a{background:rgba(34,197,94,.06);border:1px solid rgba(34,197,94,.2);border-radius:13px;padding:12px 14px}
.ag-chip{font-size:10.5px;color:var(--green);font-weight:700;letter-spacing:.06em}
.ag-a p{font-size:12.5px;color:var(--muted);margin-top:6px}
.ag-tools{display:flex;gap:8px;margin-top:9px}
.ag-tools span{font-size:10px;color:var(--faint);background:rgba(255,255,255,.05);border:1px solid var(--border);
  border-radius:7px;padding:2px 8px;font-family:ui-monospace,monospace}

/* Cloud mockup */
.cl-body{padding:18px}
.cl-title{font-size:14px}
.cl-bar{height:9px;border-radius:6px;background:rgba(255,255,255,.07);overflow:hidden;margin:10px 0 5px}
.cl-bar i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,#3b82f6,#8b5cf6)}
.cl-quota{font-size:11px;color:var(--faint)}
.cl-row{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);
  border-top:1px solid var(--border);padding:9px 2px;margin-top:9px}
.cl-row span{color:var(--faint);font-size:11px}

/* ── Compare ─────────────────────────────────────────────────────────── */
.compare{position:relative;text-align:center;padding:130px 4vw;overflow:hidden}
.compare-burst{position:absolute;inset:0;z-index:-1;filter:blur(80px);opacity:.35;
  background:radial-gradient(45% 60% at 25% 30%,rgba(6,182,212,.5),transparent 70%),
             radial-gradient(45% 60% at 75% 70%,rgba(236,72,153,.45),transparent 70%)}
.compare-sub{color:var(--muted);max-width:540px;margin:0 auto 44px;font-size:16px}
.chips{display:flex;flex-wrap:wrap;gap:11px;justify-content:center;max-width:860px;margin:0 auto}
.chips span{border:1px solid var(--border-2);border-radius:12px;padding:9px 18px;font-size:13.5px;color:var(--muted);
  background:rgba(255,255,255,.03);transition:transform .2s,border-color .2s,color .2s}
.chips span:hover{transform:translateY(-3px);border-color:var(--cyan);color:var(--text)}
.chip-ai{background:var(--grad)!important;color:#fff!important;border:none!important;font-weight:600}

/* ── Security ────────────────────────────────────────────────────────── */
.security{padding:60px 4vw 120px;max-width:1100px;margin:0 auto;text-align:center}
.sec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:50px;text-align:left}
.sec-card{background:var(--panel);border:1px solid var(--border);border-radius:20px;padding:30px 26px;
  transition:transform .3s,border-color .3s}
.sec-card:hover{transform:translateY(-6px);border-color:var(--border-2)}
.sec-ic{font-size:26px;margin-bottom:14px}
.sec-card h4{font-family:var(--display);font-size:18px;margin-bottom:8px}
.sec-card p{color:var(--muted);font-size:13.5px}

/* ── Download ────────────────────────────────────────────────────────── */
.download{position:relative;text-align:center;padding:150px 4vw 160px;overflow:hidden}
.dl-burst{position:absolute;inset:-10%;z-index:-1;filter:blur(85px);opacity:.55;
  background:radial-gradient(40% 50% at 50% 55%,rgba(139,92,246,.55),transparent 70%),
             radial-gradient(30% 40% at 30% 40%,rgba(6,182,212,.45),transparent 70%),
             radial-gradient(30% 40% at 70% 45%,rgba(236,72,153,.4),transparent 70%)}
.dl-title{font-family:var(--display);font-weight:700;font-size:clamp(42px,7vw,92px);letter-spacing:-.01em}
.dl-sub{color:var(--muted);font-size:17px;margin:16px 0 36px}
.dl-note{color:var(--faint);font-size:12.5px;margin-top:20px;letter-spacing:.04em}

/* ── Footer ──────────────────────────────────────────────────────────── */
.footer{border-top:1px solid var(--border);padding:46px 4vw 36px;max-width:1180px;margin:0 auto}
.foot-top{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:18px}
.foot-top nav{display:flex;gap:22px}
.foot-top nav a{font-size:13px;color:var(--muted)}
.foot-top nav a:hover{color:var(--text)}
.foot-legal{color:var(--faint);font-size:11.5px;margin-top:28px;max-width:640px}
.foot-copy{color:var(--faint);font-size:12px;margin-top:10px}

/* ── Responsive ──────────────────────────────────────────────────────── */
@media(max-width:920px){
  .app-row{grid-template-columns:1fr;gap:34px;padding:56px 0}
  .app-row.flip .app-copy{order:0}
  .sec-grid{grid-template-columns:1fr}
  .sl-body{grid-template-columns:54px 1fr}
  .sl-chans{display:none}
}
@media(max-width:640px){
  .nav-links{display:none}
  .hero{padding-top:110px}
  .bp{display:none}
  .sl-body{grid-template-columns:1fr}
  .sl-rail{flex-direction:row;width:100%;border-right:none;border-bottom:1px solid var(--border);padding:10px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}