:root{
  --cyan:#5fcde2;
  --b1:#092d6a;
  --b2:#245a8d;
  --b3:#458fb5;
  --b4:#5fcde2;
  --ink:#e8eef8;
  --muted: rgba(232,238,248,0.72);
  --muted2: rgba(232,238,248,0.60);
}

*{ box-sizing: border-box; }

body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--ink);
}

.space-bg{
  min-height:100vh;
  background:
    radial-gradient(1100px 600px at 85% 8%, rgba(95,205,226,0.18), transparent 60%),
    radial-gradient(900px 520px at 12% 35%, rgba(69,143,181,0.20), transparent 58%),
    radial-gradient(900px 600px at 60% 95%, rgba(9,45,106,0.35), transparent 65%),
    linear-gradient(180deg, #070b2a 0%, #05071e 55%, #030416 100%);
  overflow-x:hidden;
}

.space-bg::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,.70) 50%, transparent 51%),
    radial-gradient(1px 1px at 140px 90px, rgba(255,255,255,.55) 50%, transparent 51%),
    radial-gradient(1px 1px at 260px 140px, rgba(255,255,255,.45) 50%, transparent 51%),
    radial-gradient(2px 2px at 420px 220px, rgba(255,255,255,.60) 50%, transparent 51%),
    radial-gradient(1px 1px at 80px 210px, rgba(255,255,255,.45) 50%, transparent 51%),
    radial-gradient(2px 2px at 520px 60px, rgba(255,255,255,.55) 50%, transparent 51%),
    radial-gradient(1px 1px at 40px 120px, rgba(255,255,255,.40) 50%, transparent 51%),
    radial-gradient(2px 2px at 320px 20px, rgba(255,255,255,.55) 50%, transparent 51%),
    radial-gradient(1px 1px at 500px 260px, rgba(255,255,255,.45) 50%, transparent 51%);
  background-size: 560px 340px;
  opacity:.50;
  filter: blur(.2px);
  pointer-events:none;
  z-index:-2;
  animation: drift 18s linear infinite;
}

.space-bg::after{
  content:"";
  position:fixed;
  width:520px;
  height:520px;
  left:-160px;
  top:140px;
  background:
    radial-gradient(circle at 35% 35%, rgba(255,255,255,.16), transparent 38%),
    radial-gradient(circle at 55% 60%, rgba(95,205,226,.35), rgba(36,90,141,.18) 48%, transparent 70%);
  border-radius:9999px;
  opacity:.9;
  pointer-events:none;
  z-index:-1;
  filter: saturate(1.05);
}

@keyframes drift{
  0%{ transform: translate3d(0,0,0); }
  100%{ transform: translate3d(-120px, 80px, 0); }
}

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

.container{
  max-width: 1140px;
  margin: 0 auto;
  padding: 28px 18px 42px;
}

.glass{
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding: 10px 2px 18px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
}

.logo{
  width:44px;
  height:44px;
  border-radius: 14px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 6px;
  object-fit: contain;
}

.brand-name{
  font-weight: 700;
  letter-spacing: 0.2px;
  line-height: 1.1;
}

.brand-tag{
  margin-top: 2px;
  font-size: 12px;
  color: var(--muted2);
}

.nav{
  display:flex;
  gap:14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.navlink{
  font-size: 13px;
  color: var(--muted);
  text-decoration:none;
  padding: 8px 10px;
  border-radius: 9999px;
  border: 1px solid transparent;
}

.navlink:hover{
  color: var(--ink);
  border-color: rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
}

.hero{
  border-radius: 26px;
  padding: 26px 18px;
}

.hero-inner{
  max-width: 720px;
  padding: 8px 6px;
}

.hero-title{
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.4px;
  line-height: 1.15;
  font-size: 28px;
}

.hero-sub{
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

.hero-actions{
  margin-top: 18px;
  display:flex;
  gap:10px;
  flex-wrap: wrap;
}

.btn-primary{
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 16px;
  border-radius: 9999px;
  font-weight: 700;
  font-size: 13px;
  color: #051124;
  background: linear-gradient(90deg, var(--b4), var(--b2));
  box-shadow: 0 14px 40px rgba(95,205,226,0.18);
}

.btn-secondary{
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 16px;
  border-radius: 9999px;
  font-weight: 700;
  font-size: 13px;
  color: var(--ink);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05);
}

.btn-secondary:hover{ background: rgba(255,255,255,0.08); }

.section{
  margin-top: 24px;
  padding-top: 10px;
}

.section-head{
  margin: 18px 2px 14px;
}

.section-title{
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.section-sub{
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--muted2);
  line-height: 1.65;
  max-width: 760px;
}

.grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.card{
  padding: 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  transition: 0.22s ease;
}

.card:hover{
  border-color: rgba(95,205,226,0.65);
  background: rgba(255,255,255,0.07);
  box-shadow: 0 18px 60px rgba(95, 205, 226, 0.10);
  transform: translateY(-2px);
}

.card h3{
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: rgba(95,205,226,0.95);
}

.card p{
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.btn-card{
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 10px 12px;
  border-radius: 9999px;
  font-weight: 800;
  font-size: 12px;
  color: #051124;
  background: rgba(95,205,226,0.95);
  box-shadow: 0 14px 40px rgba(95,205,226,0.14);
}

.btn-card:hover{ filter: brightness(1.03); }

.calc-section{
  max-width: 520px;
  margin: 16px 0 0;
  border-radius: 22px;
  padding: 18px;
}

.calc-title{
  font-weight: 800;
  letter-spacing: 0.2px;
  font-size: 14px;
  color: rgba(95,205,226,0.95);
  margin-bottom: 10px;
}

.field-label{
  display:block;
  font-size: 12px;
  color: var(--muted2);
  margin: 12px 0 6px;
}

input{
  width: 100%;
  padding: 12px 12px;
  border-radius: 14px;
  color: var(--ink);
  background: rgba(4,13,26,0.55);
  border: 1px solid rgba(255,255,255,0.12);
  outline: none;
}

input:focus{
  border-color: rgba(95,205,226,0.70);
  box-shadow: 0 0 0 4px rgba(95,205,226,0.12);
}

.btn-calc{
  width: 100%;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  font-weight: 800;
  font-size: 13px;
  color: #051124;
  background: linear-gradient(90deg, var(--b4), var(--b2));
  box-shadow: 0 14px 40px rgba(95,205,226,0.18);
}

.btn-calc:hover{ filter: brightness(1.03); }

.calc-result{
  margin: 12px 0 0;
  font-weight: 700;
  color: rgba(95,205,226,0.95);
  font-size: 13px;
  min-height: 18px;
}

.footer{
  margin-top: 26px;
  border-radius: 18px;
  padding: 14px 14px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-links{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
}

.footer a{
  color: var(--muted);
  text-decoration:none;
  font-size: 12px;
}

.footer a:hover{ color: var(--ink); }

.footer-copy{
  color: rgba(232,238,248,0.55);
  font-size: 12px;
}

a, button { -webkit-tap-highlight-color: transparent; }

@media (min-width: 768px){
  .container{ padding: 34px 22px 54px; }
  .hero{ padding: 34px 26px; }
  .hero-title{ font-size: 36px; }
  .hero-sub{ font-size: 15px; }
  .grid{ gap: 16px; }
  .card{ padding: 20px; }
  .calc-section{ padding: 22px; }
}

@media (min-width: 1024px){
  .hero-title{ font-size: 42px; }
  .hero-inner{ padding: 10px 10px; }
}