:root{
  --maxw:1240px; --gutter:clamp(16px,3vw,32px); --radius:18px;
  --bg:#000; --fg:#fff; --ink:#111; --paper:#fff;
  --muted:#6b6b70; --accent:#0A84FF; --shadow:0 10px 30px rgba(0,0,0,.25);
  --slab:clamp(56px,10vw,120px);
  --step0:clamp(15px,0.9vw + 10px,18px);
  --step1:clamp(20px,1.6vw + 10px,26px);
  --step2:clamp(28px,2.6vw + 12px,38px);
  --step3:clamp(44px,4.2vw + 12px,64px);
  --step4:clamp(64px,6.2vw + 16px,92px);
}

/* Reset */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font:400 var(--step0)/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Arial,sans-serif;
  color:var(--paper); background:var(--bg);
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}

/* NAV — always dark and readable */
.nav{
  position:sticky; top:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding:calc(10px + env(safe-area-inset-top)) var(--gutter) 10px var(--gutter);
  background:#0b0b0c !important; /* kill any white/frosted bar */
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.nav a:link, .nav a:visited{color:#fff; text-decoration:none; padding:8px 10px; letter-spacing:-0.01em}
.nav .cta{background:#fff; color:#111; border-radius:999px; padding:8px 14px; font-weight:600}
.brand{font-weight:700; letter-spacing:.2px}

/* Sections */
.section{padding:var(--slab) 0}
.section.light{background:#f5f5f7; color:#111}
.section.dark{background:#000; color:#fff}
.container{max-width:var(--maxw); margin:0 auto; padding:0 var(--gutter)}

/* Hero */
.hero{min-height:92vh; display:grid; place-items:center}
.hero-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:clamp(28px,4vw,56px); align-items:center}
.hero h1{font-size:var(--step4); line-height:1.02; letter-spacing:-0.02em; margin:0 0 12px}
.hero-sub{font-size:var(--step1); color:#c7c7cc; margin:0 0 20px; max-width:65ch}
.hero-cta{display:flex; gap:14px; flex-wrap:wrap}
.btn{display:inline-block; padding:12px 18px; border-radius:12px; text-decoration:none; font-weight:600}
.btn.primary{background:var(--accent); color:#fff}
.btn.ghost{outline:1px solid #444}
.hero-media img{width:100%; height:auto; border-radius:var(--radius); box-shadow:var(--shadow)}

/* Feature panels */
.panel{display:grid; grid-template-columns:1fr 1fr; align-items:center; gap:clamp(28px,4vw,56px)}
.panel img{width:100%; height:auto; border-radius:var(--radius); box-shadow:var(--shadow)}
.section.light .copy p{color:#333}

/* Inline demo list (left column, light slab) */
.demos-inline{margin-top:18px}
.demos-title{margin:0 0 10px; font-size:var(--step2); color:#111}
.demo-list{display:grid; grid-template-columns:1fr; gap:12px}
.demo{display:grid; grid-template-columns:auto 1fr auto; align-items:center; gap:10px;
      background:#fff; color:#111; border:1px solid #e5e5ea; border-radius:14px; padding:12px}
.demo .play{width:38px; height:38px; border-radius:10px; border:1px solid #d1d1d6; background:#f2f2f7}
.demo h4{margin:0; font-size:1.02rem}
.demo .time{color:#6b6b70; font-variant-numeric:tabular-nums}
.demo .seek{grid-column:1 / -1; width:100%}
.skeleton.bar{height:78px; background:linear-gradient(90deg,#eee 25%,#f6f6f8 37%,#eee 63%);
              background-size:400% 100%; animation:shimmer 1.2s infinite; border-radius:14px}
@keyframes shimmer{0%{background-position:100% 0}100%{background-position:-100% 0}}

/* Plans */
.cards.three{display:grid; grid-template-columns:1fr 1fr 1fr; gap:20px}
.card{background:#111; color:#fff; border:1px solid #1c1c1e; border-radius:16px; padding:24px}
.card .sub{color:#c7c7cc; margin:.25rem 0 1rem}
.card ul{margin:0 0 1rem 1rem}
.card .actions{display:flex; gap:10px; flex-wrap:wrap}
.card.accent{border-color:#2b6cf6; box-shadow:0 10px 30px rgba(0,0,0,.25)}
.compare details{margin-top:16px}
.compare table{width:100%; border-collapse:collapse; font-size:.95rem}
.compare th,.compare td{border-bottom:1px solid #e5e5ea; padding:.6rem .4rem; text-align:left}
.section.light .compare th,.section.light .compare td{color:#111}

/* Contact + CTA footer + Footer */
.contact-form{display:grid; grid-template-columns:1fr 1fr; gap:14px}
.contact-form label{display:grid; gap:6px; font-size:14px; color:#8e8e93}
.contact-form input,.contact-form textarea{background:#0b0b0c; color:#fff; border:1px solid #2a2a2c; border-radius:10px; padding:12px}
.contact-form button{grid-column:1 / -1}
.cta-footer img{width:100%; height:auto; display:block; object-fit:cover}
.footer{color:#999; text-align:center; padding:40px var(--gutter) 80px}
.foot-links{display:flex; gap:8px; justify-content:center; align-items:center; margin-bottom:6px}
.foot-links a{color:#999; text-decoration:none}

/* Responsive */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .panel{grid-template-columns:1fr}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important; transition:none !important}
}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px}

/* Mobile-first overrides: ensure stunning mobile experience without altering desktop */
@media (max-width: 768px){
  /* collapse two-column layouts into single column */
  .hero{min-height:auto}
  .hero-grid{grid-template-columns:1fr; gap:24px}
  /* scale down hero heading and make CTAs full width for easier tapping */
  .hero h1{font-size:clamp(36px,7vw,48px)}
  .hero-cta .btn{width:100%}
  /* stack panel image below copy */
  .panel{grid-template-columns:1fr; gap:20px}
  /* increase spacing between demo bars */
  .demo-list{gap:14px}
  /* enlarge play button for touch */
  .demo .play{width:48px; height:48px}
  /* highlight seek thumb with accent colour */
  .demo .seek{accent-color:#0A84FF}
  /* stack plan cards into a single column */
  .cards.three{grid-template-columns:1fr}
  /* make comparison table scrollable horizontally on small screens */
  .compare table{display:block; overflow-x:auto; -webkit-overflow-scrolling:touch}
}

@media (max-width: 430px){
  /* reduce gutters on very small screens and account for iOS safe areas */
  :root{ --gutter:16px }
  .nav{ padding:calc(10px + env(safe-area-inset-top)) var(--gutter) 10px }
  /* smaller subhead for ultra small widths */
  .hero-sub{font-size:clamp(16px,4.3vw,18px)}
}