:root {
  --blue: #1e88e5;
  --blue-dark: #0c4f8f;
  --blue-light: #4eb2ff;
  --navy: #0a1128;
  --navy2: #111c3f;
  --gray: #8b9bb8;
  --white: #ffffff;
  --green: #22c55e;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(10, 17, 40, 0.35);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
  color: #e6ecfa; background: var(--navy);
  line-height: 1.6; -webkit-font-smoothing: antialiased;
}
.container { max-width: 1140px; margin: 0 auto; padding: 0 22px; }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.15; font-weight: 800; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); text-align: center; color: #fff; }
h3 { font-size: 1.1rem; }
.section-sub { text-align: center; color: var(--gray); max-width: 640px; margin: 10px auto 40px; font-size: 1.02rem; }

.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,17,40,0.9); backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo img { border-radius: 9px; }
.logo-text { font-weight: 800; font-size: 1.2rem; color: #fff; }
.logo-accent { color: var(--blue-light); }
.nav { display: flex; align-items: center; gap: 24px; }
.nav a { color: var(--gray); text-decoration: none; font-weight: 600; font-size: .93rem; }
.nav a:hover { color: var(--blue-light); }
.btn-nav { background: var(--blue); color: #fff !important; padding: 9px 19px; border-radius: 999px; font-weight: 700; }
.btn-nav:hover { box-shadow: 0 8px 20px rgba(30,136,229,.4); transform: translateY(-1px); }

.hero {
  background:
    radial-gradient(900px 460px at 85% 0%, rgba(30,136,229,.28), transparent 60%),
    radial-gradient(700px 380px at 5% 100%, rgba(78,178,255,.14), transparent 55%),
    linear-gradient(180deg, var(--navy2) 0%, var(--navy) 100%);
  padding: 70px 0 80px; text-align: center;
}
.hero-badge {
  display: inline-block; background: rgba(30,136,229,.14); border: 1px solid rgba(78,178,255,.3);
  color: var(--blue-light); font-weight: 700; font-size: .82rem;
  padding: 7px 15px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 { margin-bottom: 16px; color: #fff; }
.hl { color: var(--blue-light); }
.hero-sub { color: var(--gray); font-size: 1.1rem; max-width: 660px; margin: 0 auto 34px; }

.dl-card {
  position: relative;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(78,178,255,.25);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  max-width: 560px; margin: 0 auto; padding: 26px;
  box-shadow: var(--shadow);
}
.dl-glow {
  position: absolute; inset: -1px; border-radius: var(--radius); pointer-events: none;
  background: linear-gradient(120deg, rgba(78,178,255,.35), transparent 40%, transparent 70%, rgba(78,178,255,.2));
}
.dl-info { display: flex; align-items: center; gap: 13px; margin-bottom: 18px; text-align: left; }
.dl-icon { width: 44px; height: 44px; border-radius: 10px; }
.dl-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; padding-bottom: 14px; border-bottom: 1px solid rgba(255,255,255,.08); }
.dl-title { font-weight: 800; font-size: 1.05rem; color: #fff; letter-spacing: .02em; }
.dl-rows { margin-bottom: 18px; }
.dl-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.05);
}
.dl-row:last-child { border-bottom: none; }
.dl-row span { color: var(--gray); font-size: .88rem; }
.dl-row strong { color: #fff; font-size: .9rem; font-weight: 700; }
.dl-meta { display: flex; flex-direction: column; }
.dl-name { font-weight: 700; font-size: .95rem; color: #fff; }
.dl-size { color: var(--gray); font-size: .83rem; }
.btn-dl {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: linear-gradient(180deg, var(--blue-light), var(--blue));
  color: #fff; text-decoration: none; font-weight: 800; font-size: 1.1rem;
  padding: 16px 22px; border-radius: 12px;
  box-shadow: 0 12px 28px rgba(30,136,229,.42);
  transition: transform .15s, box-shadow .15s;
}
.btn-dl:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(30,136,229,.5); }
.dl-password {
  margin-top: 14px; display: flex; align-items: center; justify-content: center; gap: 10px;
  background: rgba(34,197,94,.10); border: 1px dashed rgba(34,197,94,.45); border-radius: 10px; padding: 9px 12px;
}
.pw-label { color: #7ee2a8; font-weight: 600; font-size: .88rem; }
.pw-code {
  font-family: 'Cascadia Code', 'Courier New', monospace;
  font-weight: 800; font-size: 1.2rem; color: var(--green);
  letter-spacing: 2px; background: rgba(255,255,255,.08); padding: 2px 11px; border-radius: 7px;
  border: 1px solid rgba(34,197,94,.35);
}
.trust-row { display: flex; justify-content: center; gap: 42px; margin-top: 42px; flex-wrap: wrap; }
.trust-item { display: flex; flex-direction: column; align-items: center; }
.trust-item strong { font-size: 1.4rem; color: var(--blue-light); font-weight: 800; }
.trust-item span { color: var(--gray); font-size: .85rem; }

.features { padding: 80px 0; background: var(--navy2); }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature-card {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius); padding: 26px 20px;
  transition: transform .2s, border-color .2s;
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(78,178,255,.3); }
.feature-icon { font-size: 1.9rem; margin-bottom: 12px; }
.feature-card h3 { margin-bottom: 7px; color: #fff; }
.feature-card p { color: var(--gray); font-size: .9rem; }

.howto { padding: 80px 0; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius); padding: 28px 24px;
}
.step-num {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--blue); color: #fff; font-weight: 800; font-size: 1.15rem;
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
  box-shadow: 0 8px 18px rgba(30,136,229,.4);
}
.step h3 { margin-bottom: 7px; color: #fff; }
.step p { color: var(--gray); font-size: .92rem; }

.works { padding: 80px 0; background: var(--navy2); }
.works-box {
  max-width: 800px; margin: 0 auto;
  background: rgba(255,255,255,.04); border: 1px solid rgba(78,178,255,.2);
  border-radius: var(--radius); padding: 30px 30px;
}
.works-box p { color: var(--gray); font-size: .96rem; margin-bottom: 12px; }
.works-box p strong { color: #fff; }
.works-note { color: var(--gray); font-size: .88rem !important; border-top: 1px solid rgba(255,255,255,.1); padding-top: 14px; margin-top: 6px; }

.faq { padding: 80px 0; }
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08);
  border-radius: 12px; margin-bottom: 11px; overflow: hidden;
}
.faq-item summary {
  padding: 17px 21px; font-weight: 700; cursor: pointer; list-style: none;
  display: flex; align-items: center; justify-content: space-between; font-size: 1rem; color: #fff;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--blue-light); font-weight: 800; transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { color: var(--blue-light); }
.faq-item p { padding: 0 21px 18px; color: var(--gray); font-size: .93rem; }

.cta-final {
  background: linear-gradient(135deg, var(--blue-dark), var(--blue) 60%, var(--blue-light));
  padding: 80px 0; text-align: center; color: #fff;
}
.cta-inner h2 { color: #fff; margin-bottom: 12px; }
.cta-inner p { max-width: 540px; margin: 0 auto 30px; color: rgba(255,255,255,.9); font-size: 1.05rem; }
.btn-dl-lg { display: inline-flex; background: #fff; color: var(--blue-dark); font-size: 1.2rem; padding: 18px 36px; box-shadow: 0 16px 40px rgba(0,0,0,.3); }
.btn-dl-lg:hover { box-shadow: 0 20px 48px rgba(0,0,0,.38); }
.dl-password-cta { display: inline-flex; margin-top: 18px; background: rgba(255,255,255,.14); border: 1px dashed rgba(255,255,255,.5); }
.dl-password-cta .pw-label { color: #fff; }
.dl-password-cta .pw-code { background: rgba(255,255,255,.2); color: #fff; border-color: rgba(255,255,255,.4); }

.footer { background: #060a1e; color: #8b9bb8; padding: 50px 0 28px; }
.footer-inner { text-align: center; }
.footer-brand { display: flex; align-items: center; justify-content: center; gap: 9px; font-weight: 800; font-size: 1.15rem; color: #fff; margin-bottom: 11px; }
.footer-brand img { border-radius: 8px; }
.footer-desc { max-width: 440px; margin: 0 auto 20px; font-size: .92rem; color: #6b7a9e; }
.footer-links { display: flex; justify-content: center; gap: 24px; margin-bottom: 20px; }
.footer-links a { color: #8b9bb8; text-decoration: none; font-size: .9rem; font-weight: 600; }
.footer-links a:hover { color: var(--blue-light); }
.footer-copy { font-size: .83rem; color: #4e5b7e; }

@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .nav a:not(.btn-nav) { display: none; }
}
@media (max-width: 560px) {
  .features-grid { grid-template-columns: 1fr; }
  .hero { padding: 50px 0 60px; }
  .dl-card { padding: 20px; }
}