:root{
  --bg:#07111f;
  --bg2:#0b1728;
  --panel:rgba(14,28,47,.82);
  --panel-strong:#101f34;
  --line:rgba(255,255,255,.10);
  --text:#f5f8ff;
  --muted:#9eb0c8;
  --blue:#4a9cff;
  --blue2:#2d73ff;
  --cyan:#62ddff;
  --green:#45d889;
  --orange:#ffae58;
  --shadow:0 24px 70px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(56,118,255,.12), transparent 31%),
    radial-gradient(circle at 85% 25%, rgba(89,218,255,.09), transparent 25%),
    linear-gradient(145deg,var(--bg),var(--bg2) 55%,#07101c);
  overflow-x:hidden;
}

body.light{
  --bg:#edf4ff;
  --bg2:#f8fbff;
  --panel:rgba(255,255,255,.86);
  --panel-strong:#ffffff;
  --line:rgba(24,55,92,.12);
  --text:#102039;
  --muted:#61748d;
  --shadow:0 22px 65px rgba(56,82,118,.16);
}

a{text-decoration:none;color:inherit}
button{font:inherit}

.page-glow{
  position:fixed;
  pointer-events:none;
  border-radius:999px;
  filter:blur(40px);
  opacity:.28;
  z-index:-1;
}
.glow-one{
  width:360px;height:360px;
  background:#146cff;
  left:-150px;top:170px;
}
.glow-two{
  width:420px;height:420px;
  background:#1fc7ff;
  right:-220px;top:360px;
  opacity:.15;
}

.topbar{
  width:min(1180px,calc(100% - 36px));
  margin:0 auto;
  height:92px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
}
.brand-mark{
  width:43px;
  height:43px;
  display:grid;
  place-items:center;
  border-radius:13px;
  color:white;
  font-weight:900;
  font-size:21px;
  background:linear-gradient(135deg,var(--cyan),var(--blue2));
  box-shadow:0 9px 25px rgba(45,115,255,.34);
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.05;
}
.brand-text strong{font-size:17px}
.brand-text small{
  color:var(--muted);
  margin-top:5px;
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
}

.theme-button{
  width:43px;height:43px;
  border:1px solid var(--line);
  border-radius:13px;
  color:var(--text);
  background:var(--panel);
  cursor:pointer;
  backdrop-filter:blur(14px);
  transition:.2s ease;
}
.theme-button:hover{transform:translateY(-2px);border-color:rgba(74,156,255,.45)}

main{
  width:min(1180px,calc(100% - 36px));
  margin:0 auto;
}

.hero{
  text-align:center;
  padding:74px 0 50px;
  max-width:850px;
  margin:0 auto;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:8px 13px;
  border:1px solid rgba(76,153,255,.25);
  border-radius:999px;
  background:rgba(63,128,255,.08);
  color:#8fc0ff;
  font-size:12px;
  font-weight:800;
  letter-spacing:.09em;
  text-transform:uppercase;
}
body.light .eyebrow{color:#236ad4}
.pulse{
  width:8px;height:8px;border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 6px rgba(69,216,137,.10);
}
.hero h1{
  margin:25px 0 15px;
  font-size:clamp(40px,6vw,72px);
  letter-spacing:-.055em;
  line-height:.98;
}
.hero p{
  margin:0 auto;
  max-width:700px;
  color:var(--muted);
  font-size:18px;
  line-height:1.7;
}
.hero-badges{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:10px;
  margin-top:26px;
}
.hero-badges span{
  padding:9px 12px;
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--muted);
  background:rgba(255,255,255,.025);
  font-size:12px;
  font-weight:700;
}

.os-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
  align-items:stretch;
  padding:18px 0 36px;
}

.os-card{
  position:relative;
  display:flex;
  flex-direction:column;
  min-height:500px;
  padding:26px;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:24px;
  background:linear-gradient(165deg,rgba(255,255,255,.055),rgba(255,255,255,.018)),var(--panel);
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.os-card:hover{
  transform:translateY(-8px);
  border-color:rgba(93,165,255,.4);
  box-shadow:0 30px 80px rgba(0,0,0,.42);
}
body.light .os-card:hover{box-shadow:0 30px 75px rgba(75,104,140,.20)}
.os-card:before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:4px;
  background:linear-gradient(90deg,var(--blue2),var(--cyan));
}
.splash-card:before{background:linear-gradient(90deg,#7a5cff,#4ac7ff,#4fe5bf)}
.tech-card:before{background:linear-gradient(90deg,#3acb79,#36a4ff)}

.featured{
  border-color:rgba(72,151,255,.32);
  transform:translateY(-10px);
}
.featured:hover{transform:translateY(-16px)}
.featured-label{
  position:absolute;
  top:16px;
  left:50%;
  transform:translateX(-50%);
  color:#a9ceff;
  font-size:10px;
  font-weight:900;
  letter-spacing:.14em;
}
body.light .featured-label{color:#326fc3}

.card-top{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-top:16px;
}

.os-icon{
  width:68px;height:68px;
  display:grid;
  place-items:center;
  border-radius:20px;
  background:linear-gradient(145deg,rgba(75,154,255,.23),rgba(51,98,191,.10));
  border:1px solid rgba(112,178,255,.22);
  color:#dff0ff;
  font-weight:900;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.10);
}
body.light .os-icon{color:#245fba}

.windows-icon{
  grid-template-columns:repeat(2,17px);
  grid-template-rows:repeat(2,17px);
  gap:3px;
}
.windows-icon span{
  width:17px;height:17px;
  border-radius:2px;
  background:linear-gradient(135deg,#7ad5ff,#3c80ff);
}
.apple-icon{
  font-size:42px;
  background:linear-gradient(145deg,rgba(125,93,255,.24),rgba(57,200,255,.13));
}
.tech-icon{
  font-size:22px;
  font-family:Consolas,monospace;
  background:linear-gradient(145deg,rgba(42,207,117,.20),rgba(54,164,255,.12));
}

.status{
  padding:7px 10px;
  border-radius:999px;
  font-size:10px;
  font-weight:900;
  letter-spacing:.07em;
  text-transform:uppercase;
}
.status.open{
  color:#7decad;
  background:rgba(45,199,110,.10);
  border:1px solid rgba(69,216,137,.18);
}
.status.locked{
  color:#ffbf79;
  background:rgba(255,168,74,.10);
  border:1px solid rgba(255,174,88,.18);
}

.card-copy{margin-top:34px}
.card-kicker{
  color:#6faaff;
  font-size:10px;
  font-weight:900;
  letter-spacing:.15em;
}
.card-copy h2{
  margin:8px 0 10px;
  font-size:32px;
  letter-spacing:-.035em;
}
.card-copy p{
  margin:0;
  color:var(--muted);
  line-height:1.7;
  font-size:14px;
}

.feature-list{
  display:grid;
  gap:10px;
  margin:26px 0;
  color:var(--muted);
  font-size:13px;
}

.launch-button{
  margin-top:auto;
  min-height:50px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:15px;
  padding:0 17px;
  border-radius:14px;
  color:white;
  font-weight:850;
  background:linear-gradient(135deg,var(--blue2),#45aaff);
  box-shadow:0 12px 26px rgba(33,105,240,.25);
  transition:.2s ease;
}
.launch-button:hover{
  filter:brightness(1.08);
  transform:translateY(-2px);
}
.launch-button span{
  width:28px;height:28px;
  display:grid;
  place-items:center;
  border-radius:9px;
  background:rgba(255,255,255,.14);
}

.info-panel{
  margin:25px 0 65px;
  padding:20px 22px;
  border:1px solid var(--line);
  border-radius:18px;
  background:var(--panel);
  backdrop-filter:blur(14px);
}
.info-panel>div{
  display:flex;
  align-items:flex-start;
  gap:14px;
}
.info-icon{font-size:22px}
.info-panel strong{display:block;margin-bottom:4px}
.info-panel p{
  margin:0;
  color:var(--muted);
  font-size:13px;
  line-height:1.6;
}

footer{
  width:min(1180px,calc(100% - 36px));
  margin:0 auto;
  padding:26px 0 38px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:20px;
  color:var(--muted);
  font-size:12px;
}
footer div{
  display:flex;
  flex-direction:column;
  gap:4px;
}
footer strong{color:var(--text)}

@media(max-width:920px){
  .os-grid{grid-template-columns:1fr;max-width:650px;margin:0 auto}
  .featured{transform:none}
  .featured:hover{transform:translateY(-8px)}
  .os-card{min-height:auto}
  .featured-label{right:24px;left:auto;transform:none}
}

@media(max-width:620px){
  .topbar{height:76px}
  .hero{padding:48px 0 32px}
  .hero h1{font-size:43px}
  .hero p{font-size:15px}
  .hero-badges{align-items:stretch}
  .hero-badges span{width:100%}
  .os-card{padding:22px;border-radius:20px}
  .card-top{margin-top:10px}
  .os-icon{width:59px;height:59px;border-radius:17px}
  footer{flex-direction:column}
}