:root {
  --primary: #2563eb;
  --primary-light: #dbeafe;
  --accent: #0d9488;
  --accent-light: #ccfbf1;
  --background: #ffffff;
  --surface: #f8fafc;
  --surface-2: #f1f5f9;
  --ink: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --font-heading: 'Inter', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'DM Mono', monospace;
  --cloud-sprite-url: url('https://cloud-harbor.redo.page/files/6qyb5md2/1771104576919-clouds-4.webp');
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
}

*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.65;
  background-color:var(--background);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{margin:0;font-family:var(--font-heading);line-height:1.15;letter-spacing:-0.03em;color:var(--ink);}
h1{font-size:clamp(2.5rem,6vw,4rem);font-weight:800;}
h2{font-size:clamp(1.75rem,4vw,2.5rem);margin-bottom:1rem;font-weight:700;}
h3{font-size:1.15rem;margin-bottom:.5rem;font-weight:600;}
p{margin-top:0;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}

.container{width:100%;max-width:1100px;margin-inline:auto;padding-inline:24px}
.section{padding-block:clamp(4rem,10vw,7rem)}

.card{
  background:var(--background);
  border:1px solid var(--border);
  border-radius:16px;
  padding:32px;
  transition:0.2s ease;
}
.card:hover{
  border-color:var(--primary);
  box-shadow:0 8px 32px rgba(37,99,235,0.08);
  transform:translateY(-2px);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  font-weight:600;
  border-radius:10px;
  padding:0.8rem 1.75rem;
  transition:0.2s ease;
  font-family:var(--font-body);
  border:none;
  cursor:pointer;
  font-size:0.95rem;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
}
.btn-primary:hover{
  background:#1d4ed8;
  transform:translateY(-1px);
  box-shadow:0 4px 16px rgba(37,99,235,0.25);
}
.btn-secondary{
  background:var(--surface);
  color:var(--ink);
  border:1px solid var(--border);
}
.btn-secondary:hover{
  border-color:var(--primary);
  color:var(--primary);
}

/* Header */
.site-header{
  position:fixed;
  top:0;
  width:100%;
  background:rgba(255,255,255,0.9);
  backdrop-filter:blur(12px);
  z-index:100;
  border-bottom:1px solid var(--border);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;min-height:68px}
.site-logo{font-family:var(--font-heading);font-weight:800;font-size:1.35rem;color:var(--ink);display:flex;align-items:center;gap:8px;}

.nav-menu{display:flex;gap:28px;align-items:center;}
.nav-menu a{font-weight:500;color:var(--muted);font-size:0.9rem;}
.nav-menu a:not(.btn):hover{color:var(--ink)}

.nav-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--ink);padding:8px;}
.site-header .nav-menu .btn-primary{
  background:var(--primary);
  color:#fff;
  border:1px solid transparent;
}
.site-header .nav-menu .btn-primary:hover{
  background:#1d4ed8;
  color:#fff;
}

/* Cloud hero */
.cloud-hero{
  position:relative;
  overflow:hidden;
  padding:160px 0 100px;
  text-align:center;
  background:
    radial-gradient(1200px 520px at 50% -12%, rgba(56,189,248,0.34) 0%, rgba(56,189,248,0) 72%),
    linear-gradient(180deg, #bfe6ff 0%, #d8efff 45%, #eef8ff 100%);
}
.cloud-hero-content{
  position:relative;
  z-index:5;
}
.cloud-hero-content h1{
  text-shadow:
    0 1px 2px rgba(255,255,255,0.35),
    0 0 14px rgba(255,255,255,0.18),
    0 10px 24px rgba(2,6,23,0.08);
}
.cloud-field{
  position:absolute;
  inset:0;
  pointer-events:none;
  z-index:1;
  background:
    radial-gradient(900px 360px at 10% 0%, rgba(51,65,85,0.08), transparent 70%),
    radial-gradient(900px 360px at 90% 0%, rgba(30,41,59,0.08), transparent 70%);
}
.sky-tint{
  background:linear-gradient(180deg, #dff0ff 0%, #eef7ff 100%);
}
.sky-tint-soft{
  background:linear-gradient(180deg, #edf7ff 0%, #f8fbff 100%);
}
.cloud{
  display:block;
  --cell-x: 0%;
  --cell-y: 0%;
  --w: 300px;
  --h: 190px;
  --opacity: .45;
  --dur: 38s;
  --delay: 0s;
  --scale: 1;
  --bob-a: -8px;
  --bob-b: 8px;
  position:absolute;
  width:var(--w);
  height:var(--h);
  left:0;
  top:var(--y);
  transform:translate(-35vw, -50%);
  background-image:var(--cloud-sprite-url);
  background-size:200% 200%;
  background-position:var(--cell-x) var(--cell-y);
  background-repeat:no-repeat;
  opacity:var(--opacity);
  filter:
    drop-shadow(0 8px 14px rgba(51,65,85,.18))
    drop-shadow(0 18px 28px rgba(15,23,42,.12));
  animation:cloudTraverseA var(--dur) linear infinite;
  animation-delay:var(--delay);
}
.cloud::after{
  content:'';
  position:absolute;
  inset:auto 10% -13%;
  height:24%;
  border-radius:50%;
  background:rgba(30,41,59,.18);
  filter:blur(14px);
  opacity:.42;
}

.sp1{ --cell-x:0%; --cell-y:0%; }
.sp2{ --cell-x:100%; --cell-y:0%; }
.sp3{ --cell-x:0%; --cell-y:100%; }
.sp4{ --cell-x:100%; --cell-y:100%; }

/* Three cloud lanes with evenly spaced phase offsets to avoid bunching/gaps */
.lane-a{ animation-name: cloudTraverseA; --dur: 84s; }
.lane-b{ animation-name: cloudTraverseB; --dur: 90s; }
.lane-c{ animation-name: cloudTraverseC; --dur: 78s; }

.cloud-1{ --y: 18%; --delay: 0s;   --opacity:.34; --w:290px; --h:178px; --scale:1.04; --bob-a:-9px;  --bob-b:10px; }
.cloud-2{ --y: 28%; --delay:-21s;  --opacity:.24; --w:360px; --h:220px; --scale:1.12; --bob-a:-12px; --bob-b:8px;  }
.cloud-3{ --y: 38%; --delay:-42s;  --opacity:.38; --w:260px; --h:156px; --scale:.96; --bob-a:-7px;  --bob-b:9px;  }
.cloud-4{ --y: 48%; --delay:-63s;  --opacity:.2;  --w:390px; --h:236px; --scale:1.16; --bob-a:-10px; --bob-b:12px; }
.cloud-5{ --y: 54%; --delay: 0s;   --opacity:.34; --w:280px; --h:170px; --scale:1.02; --bob-a:-6px;  --bob-b:8px;  }
.cloud-6{ --y: 62%; --delay:-22.5s;--opacity:.24; --w:330px; --h:198px; --scale:1.1;  --bob-a:-12px; --bob-b:9px;  }
.cloud-7{ --y: 70%; --delay:-45s;  --opacity:.18; --w:250px; --h:150px; --scale:.94; --bob-a:-5px;  --bob-b:6px;  }
.cloud-8{ --y: 78%; --delay:-67.5s;--opacity:.16; --w:360px; --h:216px; --scale:1.14; --bob-a:-10px; --bob-b:8px;  }
.cloud-9{ --y: 16%; --delay: 0s;   --opacity:.14; --w:420px; --h:252px; --scale:1.2;  --bob-a:-15px; --bob-b:11px; }
.cloud-10{--y: 34%; --delay:-19.5s;--opacity:.2;  --w:300px; --h:182px; --scale:1.03; --bob-a:-8px;  --bob-b:9px;  }
.cloud-11{--y: 60%; --delay:-39s;  --opacity:.12; --w:460px; --h:276px; --scale:1.25; --bob-a:-16px; --bob-b:12px; }
.cloud-12{--y: 84%; --delay:-58.5s;--opacity:.12; --w:420px; --h:252px; --scale:1.18; --bob-a:-13px; --bob-b:10px; }

@keyframes cloudTraverseA{
  0%{
    transform:translate(-22vw, calc(-50% + var(--bob-a))) scale(var(--scale));
  }
  50%{
    transform:translate(38vw, calc(-50% + var(--bob-b))) scale(calc(var(--scale) * 1.03));
  }
  100%{
    transform:translate(112vw, calc(-50% + var(--bob-a))) scale(var(--scale));
  }
}
@keyframes cloudTraverseB{
  0%{
    transform:translate(-18vw, calc(-50% + var(--bob-a))) scale(var(--scale));
  }
  50%{
    transform:translate(42vw, calc(-50% + var(--bob-b))) scale(calc(var(--scale) * 1.025));
  }
  100%{
    transform:translate(116vw, calc(-50% + var(--bob-a))) scale(var(--scale));
  }
}
@keyframes cloudTraverseC{
  0%{
    transform:translate(-26vw, calc(-50% + var(--bob-a))) scale(var(--scale));
  }
  50%{
    transform:translate(36vw, calc(-50% + var(--bob-b))) scale(calc(var(--scale) * 1.02));
  }
  100%{
    transform:translate(108vw, calc(-50% + var(--bob-a))) scale(var(--scale));
  }
}

/* Grids */
.grid-3{display:grid;gap:20px;grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-2{display:grid;gap:40px;grid-template-columns:repeat(2,minmax(0,1fr))}

/* Accordion */
.accordion-toggle{
  width:100%;
  background:var(--background);
  border:1px solid var(--border);
  border-radius:12px;
  padding:18px 24px;
  font-size:0.95rem;
  font-weight:600;
  font-family:var(--font-heading);
  color:var(--ink);
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  transition:0.15s ease;
  text-align:left;
}
.accordion-toggle:hover{border-color:var(--primary);color:var(--primary)}
.accordion-toggle.open{border-color:var(--primary);color:var(--primary);border-radius:12px 12px 0 0;border-bottom:none;}
.accordion-content{
  display:none;
  background:var(--background);
  border:1px solid var(--primary);
  border-top:none;
  border-radius:0 0 12px 12px;
  padding:0 24px 20px;
  color:var(--muted);
  line-height:1.7;
}
.accordion-content.open{display:block}

/* Footer */
.site-footer a:hover{color:var(--ink)!important}

@keyframes pulse{
  0%{transform:scale(1);opacity:1}
  50%{transform:scale(1.5);opacity:0.5}
  100%{transform:scale(1);opacity:1}
}

@media(max-width:900px){
  .cloud-hero{
    padding:136px 0 80px;
  }
  .cloud{
    --w:200px;
    --h:122px;
    --dur:58s;
  }
  .cloud-2,.cloud-4,.cloud-9,.cloud-11,.cloud-12{
    display:none;
  }
  .cloud-1{ --y:16%; }
  .cloud-3{ --y:28%; }
  .cloud-5{ --y:44%; }
  .cloud-6{ --y:58%; }
  .cloud-7{ --y:70%; }
  .cloud-8{ --y:80%; }
  .cloud-10{ --y:52%; }
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .nav-menu{display:none;}
  .nav-menu.active{
    display:flex;
    flex-direction:column;
    position:absolute;
    top:100%;left:0;right:0;
    background:var(--background);
    padding:24px;
    border-bottom:1px solid var(--border);
    box-shadow:0 12px 24px rgba(0,0,0,0.06);
  }
  .nav-toggle{display:block}
}

@media (prefers-reduced-motion: reduce){
  .cloud{
    animation:none;
  }
}