:root {
  --navy: #071b35;
  --navy-2: #0b294d;
  --blue: #1677ff;
  --cyan: #22c7f2;
  --ink: #102033;
  --muted: #66758a;
  --line: #dfe7f0;
  --soft: #f4f8fc;
  --white: #ffffff;
  --radius: 22px;
  --shadow: 0 18px 50px rgba(7, 27, 53, .10);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.header {
  color: var(--white);
  min-height: 720px;
  background:
    radial-gradient(circle at 78% 28%, rgba(34,199,242,.24), transparent 24%),
    radial-gradient(circle at 10% 10%, rgba(22,119,255,.22), transparent 28%),
    linear-gradient(135deg, #06172d 0%, #09284b 58%, #0a3a65 100%);
  overflow: hidden;
  position: relative;
}
.header::after {
  content: "";
  position: absolute;
  inset: auto -10% -35% 45%;
  height: 520px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.10);
  box-shadow: 0 0 0 70px rgba(255,255,255,.025), 0 0 0 140px rgba(255,255,255,.02);
}
.navbar {
  height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 3;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  font-weight: 800;
}
.brand strong { display: block; font-size: 14px; letter-spacing: 1.2px; }
.brand small { display: block; opacity: .65; font-size: 9px; letter-spacing: 1.7px; }
.nav-menu { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 600; }
.nav-menu a { opacity: .86; transition: .2s; }
.nav-menu a:hover { opacity: 1; color: #fff; }
.nav-cta { padding: 11px 18px; border: 1px solid rgba(255,255,255,.25); border-radius: 999px; }
.menu-toggle { display: none; background: none; border: 0; color: #fff; font-size: 27px; }

.hero {
  min-height: 634px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.eyebrow {
  color: var(--blue);
  font-size: 12px;
  letter-spacing: 2px;
  font-weight: 800;
}
.header .eyebrow { color: var(--cyan); }
.hero h1 {
  font-size: clamp(42px, 5.2vw, 68px);
  line-height: 1.07;
  letter-spacing: -2.5px;
  margin: 18px 0;
  max-width: 730px;
}
.hero h1 span { color: var(--cyan); }
.hero-copy > p { color: rgba(255,255,255,.72); max-width: 650px; font-size: 17px; }
.hero-actions { display: flex; gap: 12px; margin: 30px 0 24px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 21px; border-radius: 10px; font-weight: 700; transition: .2s; }
.btn-primary { background: var(--white); color: var(--navy); }
.btn-primary:hover { transform: translateY(-2px); }
.btn-secondary { border: 1px solid rgba(255,255,255,.25); color: #fff; }
.hero-points { display: flex; flex-wrap: wrap; gap: 18px; color: rgba(255,255,255,.64); font-size: 12px; }

.hero-card {
  justify-self: end;
  width: min(390px, 100%);
  padding: 44px;
  border-radius: 30px;
  background: rgba(255,255,255,.09);
  border: 1px solid rgba(255,255,255,.17);
  backdrop-filter: blur(14px);
  box-shadow: 0 30px 80px rgba(0,0,0,.2);
}
.signal { display: flex; align-items: end; gap: 6px; height: 70px; margin-bottom: 25px; }
.signal span { width: 9px; border-radius: 99px; background: var(--cyan); opacity: .9; }
.signal span:nth-child(1) { height: 20px; opacity: .35; }
.signal span:nth-child(2) { height: 35px; opacity: .5; }
.signal span:nth-child(3) { height: 52px; opacity: .7; }
.signal span:nth-child(4) { height: 70px; }
.card-label { color: rgba(255,255,255,.55); font-size: 11px; letter-spacing: 2px; font-weight: 800; }
.hero-card h2 { font-size: 35px; line-height: 1.15; margin: 10px 0 18px; }
.card-line { height: 1px; background: rgba(255,255,255,.16); margin: 20px 0; }
.hero-card > p:last-child { color: rgba(255,255,255,.68); font-size: 14px; }

.section { padding: 105px 0; }
.section-heading { max-width: 650px; margin-bottom: 50px; }
.section-heading h2, .about h2, .contact-section h2 {
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: -1.5px;
  margin: 9px 0 14px;
}
.section-heading p { color: var(--muted); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pricing-card {
  position: relative; padding: 34px; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; box-shadow: var(--shadow);
}
.pricing-card.featured { border: 2px solid var(--blue); transform: translateY(-9px); }
.popular {
  position: absolute; top: 0; right: 25px; transform: translateY(-50%);
  background: var(--blue); color: #fff; border-radius: 999px; padding: 6px 12px;
  font-size: 9px; font-weight: 800; letter-spacing: 1px;
}
.plan-icon {
  width: 45px; height: 45px; display: grid; place-items: center; border-radius: 13px;
  background: var(--soft); color: var(--blue); font-weight: 800; margin-bottom: 22px;
}
.plan-type { color: var(--blue); font-size: 9px; font-weight: 800; letter-spacing: 1.3px; }
.pricing-card h3 { font-size: 27px; margin: 4px 0 8px; }
.plan-desc { color: var(--muted); font-size: 13px; min-height: 66px; }
.pricing-card ul { list-style: none; margin: 24px 0; border-top: 1px solid var(--line); padding-top: 20px; }
.pricing-card li { font-size: 13px; margin: 10px 0; }
.pricing-card li::before { content: "✓"; color: var(--blue); font-weight: 800; margin-right: 9px; }
.plan-btn { font-size: 13px; font-weight: 800; color: var(--blue); }
.pricing-note { margin-top: 22px; font-size: 11px; color: #8290a1; }

.section-dark {
  background: var(--navy); color: #fff;
  position: relative; overflow: hidden;
}
.section-dark::before {
  content: ""; position: absolute; width: 480px; height: 480px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.06); right: -160px; top: -100px;
}
.light p { color: rgba(255,255,255,.62); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature { padding: 28px 22px; border-top: 1px solid rgba(255,255,255,.16); }
.feature-number { color: var(--cyan); font-size: 11px; font-weight: 800; letter-spacing: 2px; margin-bottom: 38px; }
.feature h3 { font-size: 19px; margin-bottom: 9px; }
.feature p { color: rgba(255,255,255,.57); font-size: 13px; }

.about { background: var(--soft); }
.about-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; align-items: start; }
.about h2 { max-width: 480px; }
.about p { font-size: 18px; margin-bottom: 20px; }
.about .muted { color: var(--muted); font-size: 14px; }

.contact-section { padding: 90px 0; background: #eef6ff; }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; align-items: center; }
.contact-section > .container > div:first-child p { color: var(--muted); max-width: 540px; }
.contact-box { background: #fff; border-radius: 22px; padding: 18px 28px; box-shadow: var(--shadow); }
.contact-row { display: flex; gap: 17px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-row:last-child { border-bottom: 0; }
.contact-icon {
  width: 38px; height: 38px; flex: 0 0 38px; border-radius: 11px;
  background: var(--soft); color: var(--blue); display: grid; place-items: center; font-weight: 800;
}
.contact-row small { color: #8390a0; font-size: 9px; font-weight: 800; letter-spacing: 1.5px; }
.contact-row p { font-size: 13px; margin-top: 3px; }

.footer { background: #041226; color: #fff; padding: 30px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.footer strong { font-size: 12px; letter-spacing: 1px; }
.footer p { color: rgba(255,255,255,.5); font-size: 11px; }
.footer-inner > div p { margin-top: 3px; }

.back-top {
  position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px;
  border: 0; border-radius: 50%; background: var(--blue); color: #fff;
  font-size: 19px; cursor: pointer; opacity: 0; visibility: hidden; transition: .2s;
}
.back-top.show { opacity: 1; visibility: visible; }

@media (max-width: 900px) {
  .nav-menu {
    position: absolute; top: 76px; right: 0; width: min(280px, 90vw);
    display: none; flex-direction: column; align-items: stretch; gap: 0;
    background: #082441; padding: 12px; border-radius: 16px; box-shadow: var(--shadow);
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px 14px; }
  .menu-toggle { display: block; }
  .hero { grid-template-columns: 1fr; padding-top: 70px; padding-bottom: 80px; }
  .hero-card { justify-self: start; max-width: 430px; }
  .header { min-height: auto; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 600px; }
  .pricing-card.featured { transform: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 35px; }
}
@media (max-width: 600px) {
  .container { width: min(100% - 28px, 1120px); }
  .navbar { height: 74px; }
  .hero h1 { letter-spacing: -1.5px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-points { flex-direction: column; gap: 8px; }
  .hero-card { padding: 30px; }
  .section { padding: 75px 0; }
  .section-heading { margin-bottom: 34px; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}