:root {
  --hx-dark: #0D2B45;
  --hx-deep: #0E3854;
  --hx-red: #FF0025;
  --hx-soft: #8FA6B7;
  --hx-white: #ffffff;
  --radius: 18px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  --font: 'Space Grotesk', sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: radial-gradient(ellipse at top right, #154362 0%, #0D2B45 70%);
  font-family: var(--font);
  color: var(--hx-white);
  line-height: 1.6;
}

.container {
  width: min(1200px, 90vw);
  margin: 0 auto;
  padding: 40px 0;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 43, 69, 0.85);
  backdrop-filter: blur(12px);
  padding: 8px 0;
  border-bottom: 1px solid rgba(13, 4, 4, 0.1);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  height: 66px;
}

nav a {
  margin-left: 24px;
  text-decoration: none;
  color: var(--hx-soft);
  font-weight: 500;
  transition: color 0.3s ease;
}

nav a:hover {
  color: var(--hx-white);
}

/* Hero */
.hero {
  text-align: center;
  padding: 100px 0;
  background: linear-gradient(to bottom, #0E3854, transparent);
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--hx-red);
}

.tagline {
  color: var(--hx-soft);
  font-size: 1.2rem;
  margin-bottom: 30px;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn.primary {
  background: var(--hx-red);
  color: var(--hx-white);
  box-shadow: var(--shadow);
}

.btn.primary:hover {
  filter: brightness(1.1);
}

.btn.ghost {
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--hx-white);
  background: transparent;
}

.btn.ghost:hover {
  background: rgba(255,255,255,0.05);
}

/* Features */
.features {
  background: #0D2B45;
  padding: 80px 0;
}

.grid {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.card h3 {
  margin-bottom: 12px;
  font-size: 1.4rem;
  color: #ffffff;
}

/* Footer */
.footer {
  background: #081b2b;
  text-align: center;
  padding: 32px 0;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer p {
  color: var(--hx-soft);
  font-size: 0.9rem;
}

/* ===== Responsive design ===== */
@media (max-width: 768px) {
  .navbar .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 10px 5vw;
  }

  .logo {
    height: 40px;
  }

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

  .navbar nav a {
    font-size: 0.9rem;
    padding: 8px 12px;
  }

  .btn.ghost {
    padding: 8px 14px;
    font-size: 0.9rem;
    border-radius: 12px;
    white-space: nowrap;
  }
}

.footer .host a {
  color: #8FA6B7;
  text-decoration: none;
  font-weight: 500;
}

.footer .host a:hover {
  color: #ffffff;
  text-decoration: underline;
}