/* ═══════════════════════════════════════════════════════════════════════
   yaya.tech — The stack is open. Agents + Payments.
   Design: THE SIGNAL — alien beacon in the void. Violet accent.
   ═══════════════════════════════════════════════════════════════════════ */

:root {
  --bg: #0a0908; --bg2: #141210; --paper: #f4efe6;
  --ink: #ede7db; --muted: #a39c8d; --faint: #6b6455;
  --line: rgba(237,231,219,.08); --line2: rgba(237,231,219,.16);
  --accent: #7C6CF0; --accent-hi: #9588f4; --accent-glow: rgba(124,108,240,.15);
  --serif: 'Fraunces',Georgia,serif; --sans: 'Inter',system-ui,sans-serif;
  --mono: 'JetBrains Mono',monospace; --maxw: 720px;
  --ease: cubic-bezier(.22,1,.36,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--accent);color:#fff}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* Starfield */
#stars{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0}
.star{position:absolute;background:#fff;border-radius:50%;opacity:0;animation:starDrift linear infinite}
@keyframes starDrift{0%{opacity:0;transform:translateY(0)}10%{opacity:var(--star-op,.6)}90%{opacity:var(--star-op,.6)}100%{opacity:0;transform:translateY(-100vh)}}

/* Nav */
#nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(10,9,8,.75);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 20px;height:60px;display:flex;align-items:center;gap:12px}
.nav-brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink)}
.nav-alien{display:block;width:28px;height:28px;background:var(--accent);-webkit-mask:url(/alien-icon.svg) center/contain no-repeat;mask:url(/alien-icon.svg) center/contain no-repeat}
.nav-logo{font-family:var(--serif);font-size:18px;font-weight:600;letter-spacing:-.01em}
.nav-logo em{font-style:normal;color:var(--accent)}
.lang-switch{display:flex;align-items:center;gap:2px;border:1px solid var(--line2);border-radius:999px;padding:2px;margin-left:auto}
.lang-switch button{background:none;border:0;cursor:pointer;color:var(--muted);font-family:var(--mono);font-size:10px;letter-spacing:.08em;padding:4px 8px;border-radius:999px;transition:all .2s}
.lang-switch button:hover{color:var(--ink)}
.lang-switch button.active{background:var(--ink);color:#0a0908}
.nav-signin{color:var(--muted);text-decoration:none;font-size:13px;font-weight:500;padding:8px 14px;border:1px solid var(--line2);border-radius:8px;transition:all .2s}
.nav-signin:hover{color:var(--ink);border-color:var(--accent)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--sans);font-size:15px;font-weight:600;padding:14px 28px;border-radius:10px;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:all .25s var(--ease);min-height:44px}
.btn-primary{background:var(--paper);color:#141210}
.btn-primary:hover{background:#fff;transform:translateY(-1px);box-shadow:0 12px 32px -14px rgba(244,239,230,.35)}
.btn-outline{border-color:var(--line2);color:var(--ink)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}

/* Kicker */
.kicker{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);border:1px solid rgba(124,108,240,.3);border-radius:999px;padding:9px 18px;background:rgba(124,108,240,.06)}
.kicker::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* Alien Beacon */
.alien-beacon{position:relative;display:inline-block;margin-bottom:32px}
.alien-glyph{display:block;width:96px;height:96px;background:var(--accent);-webkit-mask:url(/alien-icon.svg) center/contain no-repeat;mask:url(/alien-icon.svg) center/contain no-repeat;animation:alienFloat 4s ease-in-out infinite;filter:drop-shadow(0 0 30px var(--accent-glow)) drop-shadow(0 0 80px rgba(124,108,240,.08))}
@keyframes alienFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* Hero */
.hero{position:relative;padding:120px 0 60px;overflow:hidden;display:flex;flex-direction:column;justify-content:center;z-index:1}
.hero-glow{position:absolute;top:-100px;left:50%;transform:translateX(-50%);width:600px;height:400px;background:radial-gradient(closest-side,var(--accent-glow),transparent 70%);pointer-events:none}
.hero-inner{position:relative;text-align:center;max-width:640px;margin:0 auto}
h1{font-family:var(--serif);font-weight:600;font-size:clamp(36px,7vw,72px);line-height:1.05;letter-spacing:-.03em;margin:28px 0 20px}
.hero-sub{font-size:17px;line-height:1.7;color:var(--muted);max-width:520px;margin:0 auto 36px}
.hero-ctas{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Link cards */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:720px;margin:0 auto}
.link-card{display:block;background:var(--bg2);border:1px solid var(--line);border-radius:14px;padding:36px 32px;text-decoration:none;transition:border-color .25s,transform .3s var(--ease),box-shadow .3s var(--ease);position:relative;overflow:hidden}
.link-card::after{content:"";position:absolute;top:0;right:0;width:180px;height:180px;border-radius:50%;transform:translate(50px,-50px);transition:transform .4s var(--ease);background:radial-gradient(closest-side,rgba(124,108,240,.08),transparent)}
.link-card:hover{border-color:var(--line2);transform:translateY(-2px);box-shadow:0 16px 40px -16px rgba(0,0,0,.4)}
.link-card:hover::after{transform:translate(40px,-40px)}
.link-card-alt::after{background:radial-gradient(closest-side,rgba(255,90,60,.08),transparent)}
.link-card-soon{opacity:.5;pointer-events:none}
.link-card-label{font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:14px;position:relative;z-index:1}
.link-card-alt .link-card-label{color:#FF5A3C}
.link-card-title{font-family:var(--serif);font-size:28px;font-weight:600;letter-spacing:-.015em;color:var(--ink);margin-bottom:12px;position:relative;z-index:1}
.link-card-title em{font-style:normal;color:var(--accent)}
.link-card-alt .link-card-title em{color:#FF5A3C}
.link-card p{color:var(--muted);font-size:14px;line-height:1.65;max-width:300px;position:relative;z-index:1}
.link-card-arrow{display:inline-block;margin-top:18px;font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--accent);position:relative;z-index:1;transition:color .2s}
.link-card:hover .link-card-arrow{color:var(--ink)}
.muted{color:var(--faint)}

/* Manifesto */
.manifesto{background:var(--paper);color:#1c1917;padding:80px 0;position:relative;overflow:hidden;z-index:1}
.manifesto::after{content:"";position:absolute;right:-140px;top:-140px;width:400px;height:400px;border-radius:50%;background:radial-gradient(closest-side,rgba(124,108,240,.1),transparent);pointer-events:none}
.manifesto .container{position:relative;max-width:680px;text-align:center}
.manifesto blockquote{font-family:var(--serif);font-weight:500;font-size:clamp(22px,3vw,32px);line-height:1.35;letter-spacing:-.015em}
.manifesto blockquote em{font-style:italic;color:var(--accent)}
.manifesto .quote-sub{font-size:15px;line-height:1.75;color:#5c564a;margin-top:20px;max-width:560px;margin-left:auto;margin-right:auto}

/* Section */
.section{padding:80px 0;position:relative;z-index:1}

/* Final CTA */
.final-cta{padding:80px 0;position:relative;z-index:1;text-align:center}
.final-inner{max-width:480px;margin:0 auto}
.final-alien{display:inline-block;width:56px;height:56px;background:var(--accent);-webkit-mask:url(/alien-icon.svg) center/contain no-repeat;mask:url(/alien-icon.svg) center/contain no-repeat;margin-bottom:24px;animation:alienFloat 4s ease-in-out infinite;filter:drop-shadow(0 0 20px var(--accent-glow))}
.final-inner h2{font-family:var(--serif);font-size:clamp(28px,4.5vw,40px);font-weight:600;letter-spacing:-.02em;margin-bottom:12px}
.final-inner p{color:var(--muted);font-size:16px;margin-bottom:32px}
.final-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Footer */
.footer{border-top:1px solid var(--line);padding:48px 0 32px;position:relative;z-index:1}
.footer-inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;margin-bottom:32px;align-items:center}
.footer-logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink);font-family:var(--serif);font-size:18px;font-weight:600}
.footer-logo em{font-style:normal;color:var(--accent)}
.footer-alien{display:block;width:20px;height:20px;background:var(--accent);-webkit-mask:url(/alien-icon.svg) center/contain no-repeat;mask:url(/alien-icon.svg) center/contain no-repeat;opacity:.6}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}
.footer-links a{color:var(--muted);text-decoration:none;font-size:13px;transition:color .2s}
.footer-links a:hover{color:var(--ink)}
.footer-copy{color:var(--faint);font-size:12px;font-family:var(--mono)}

/* Reveal */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.fade-in.visible{opacity:1;transform:none}

/* Responsive */
@media(max-width:768px){
  .grid2{grid-template-columns:1fr}
  .hero{padding-top:120px;min-height:auto;padding-bottom:60px}
}
@media(max-width:480px){
  h1{font-size:clamp(32px,9vw,44px)}
  .hero{padding-top:100px}
  .section{padding:60px 0}
  .alien-glyph{width:72px;height:72px}
  .footer-inner{flex-direction:column;gap:24px}
}