/* AIRSLYDE — dark cinematic theme */
:root{
  --bg:#0a0b0d;
  --panel:#0f1115;
  --text:#e6f7ff;
  --muted:#9fb8c2;
  --accent:#00e5ff;
  --accent-2:#7af7d0;
  --ring: 0 0 0 2px rgba(0,229,255,.35),0 0 40px rgba(0,229,255,.15);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial;
  background: radial-gradient(1200px 700px at 70% -10%, rgba(0,229,255,.06), transparent 60%),
              radial-gradient(1000px 500px at -10% 20%, rgba(122,247,208,.05), transparent 60%),
              var(--bg);
  color:var(--text);
}

/* Intro overlay (Arc‑style) */
.intro{
  position:fixed;inset:0;background:var(--bg);display:grid;place-items:center;
  z-index:9999;transition:opacity .8s ease .3s, visibility .8s ease 1s;
}
.intro.hidden{opacity:0;visibility:hidden}
.intro-star,.intro-ring{position:absolute;border-radius:999px;pointer-events:none}
.intro-star{width:22vmin;height:22vmin;background:radial-gradient(circle at 50% 50%, var(--accent), transparent 60%);filter:blur(8px);}
.intro-ring{width:46vmin;height:46vmin;border:2px solid rgba(0,229,255,.3);box-shadow:var(--ring)}
.intro-label{letter-spacing:.3em;font-weight:800; font-size:1rem; color:var(--muted); transform:translateY(6vmin)}

/* Nav */
.nav{
  position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;background:linear-gradient(180deg, rgba(10,11,13,.85), rgba(10,11,13,.35) 60%, transparent);
  backdrop-filter: blur(8px); z-index:10; border-bottom:1px solid rgba(255,255,255,.04);
}
.brand{display:flex;gap:10px;align-items:center}
.logo{width:28px;height:28px}
.wordmark{font-weight:800;letter-spacing:.12em}
.links a{color:var(--muted);text-decoration:none;margin:0 14px;font-weight:500}
.links a:hover{color:var(--text)}
.btn{border:1px solid rgba(255,255,255,.12);padding:10px 14px;border-radius:12px;text-decoration:none}
.btn-ghost{color:var(--text);}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2)); color:#001418; border:0; box-shadow:0 10px 30px rgba(0,229,255,.25);}
.menu{display:none;background:none;border:0;gap:4px}
.menu span{display:block;width:24px;height:2px;background:#b7d7df}

@media (max-width:900px){
  .links{display:none}
  .menu{display:flex;flex-direction:column}
}

/* Hero */
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:center;padding:80px 24px 40px;min-height:70vh}
.hero .glow{position:absolute;inset:auto 0 0 0;height:40vh;background:radial-gradient(60vw 30vh at 50% 100%, rgba(0,229,255,.06), transparent 60%)}
.hero-copy h1{font-size: clamp(32px, 6vw, 64px); line-height:1.05; margin:0 0 12px}
.accent{background:linear-gradient(135deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--muted);max-width:650px}
.cta-row{display:flex;gap:12px;margin:18px 0 10px}
.trust{color:#86a8b3;font-size:.9rem}
.hero-art{position:relative}
.floating-cards{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}
.floating-cards .card{
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.12);
  padding:10px 14px;border-radius:12px;color:var(--text);font-size:.9rem;
  box-shadow:0 10px 40px rgba(0,0,0,.35); animation: float 6s ease-in-out infinite;
}
.floating-cards .card:nth-child(2){transform:translate(160px,-140px);animation-delay: .6s}
.floating-cards .card:nth-child(3){transform:translate(-160px, -30px);animation-delay: 1.1s}
.floating-cards .card:nth-child(4){transform:translate(40px, 140px);animation-delay: 1.7s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

@media (max-width:900px){
  .hero{grid-template-columns:1fr; padding-top:56px}
  .hero-art{order:-1}
}

/* Sections */
.section{padding:72px 24px}
.section-head{max-width:900px;margin:0 auto 24px;text-align:center}
.section-head h2{font-size: clamp(24px, 4vw, 40px);margin:0 0 6px}
.section-head p{color:var(--muted)}

.grid.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:1100px;margin:0 auto}
.grid.features article{background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.1); padding:18px;border-radius:16px}
.grid.features h3{margin:0 0 6px}
.grid.features p{color:#a7c3cc}

@media (max-width:900px){
  .grid.features{grid-template-columns:1fr}
}

/* How steps */
.how-steps{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:20px auto;max-width:900px}
.badge{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;
  background:linear-gradient(180deg,var(--accent),var(--accent-2)); color:#001418;font-weight:800;margin-right:8px}
.how-note{color:#86a8b3;text-align:center;margin-top:8px}

/* Demo */
.demo .demo-frame{display:grid;place-items:center}
.demo-screen{width:min(100%,950px);height:420px;border-radius:18px;
  background: radial-gradient(700px 300px at 70% -10%, rgba(0,229,255,.06), transparent 60%), var(--panel);
  border:1px solid rgba(255,255,255,.1); box-shadow:0 20px 80px rgba(0,0,0,.4); display:grid;place-items:center}
.status{color:#a7c3cc}

/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:1100px;margin:12px auto 0}
.price-card{background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.1);border-radius:18px;padding:20px;position:relative}
.price-card .price{font-size:42px;font-weight:800; margin:2px 0 8px}
.price-card .price span{font-size:16px;color:#a7c3cc}
.price-card ul{margin:10px 0 16px; padding-left:18px; color:#a7c3cc}
.price-card.featured{border-color:rgba(0,229,255,.6); box-shadow:0 20px 70px rgba(0,229,255,.15)}
.ribbon{position:absolute;top:10px;right:10px;background:linear-gradient(135deg,var(--accent),var(--accent-2)); color:#001418; padding:6px 10px;border-radius:999px;font-size:.8rem;font-weight:800}
@media (max-width:900px){.pricing-grid{grid-template-columns:1fr}}

/* CTA */
.cta{text-align:center}
.signup{display:flex;gap:8px;justify-content:center;margin-top:12px}
.signup input{background:#0b0e12;border:1px solid rgba(255,255,255,.12); color:var(--text); padding:12px 14px;border-radius:12px;min-width:260px}
.signup button{cursor:pointer}
.note{color:#86a8b3;margin-top:8px}

/* Footer */
.footer{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:24px;background:#080a0d;color:#a7c3cc;border-top:1px solid rgba(255,255,255,.06)}
.footer a{color:#bdeeff;text-decoration:none}
.mini-links{display:flex;gap:14px}

/* Utility */
.btn:active{transform:translateY(1px)}
img{max-width:100%;height:auto;display:block}