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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #030712;
  color: white;
}

/* HEADER */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 18px 8%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: rgba(3, 7, 18, 0.55);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0, 183, 255, 0.18);
}

.brand {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 3px;
}

.brand span {
  color: #00b7ff;
}

.header nav {
  display: flex;
  gap: 28px;
}

.header nav a {
  color: #dcecff;
  text-decoration: none;
  font-size: 15px;
  transition: 0.3s;
}

.header nav a:hover {
  color: #00b7ff;
}

/* HERO */
.hero {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 130px 8% 80px;

  background:
    linear-gradient(
      180deg,
      rgba(3, 7, 18, 0.25) 0%,
      rgba(3, 7, 18, 0.45) 38%,
      rgba(3, 7, 18, 0.95) 100%
    ),
    url("../imagenes/veltrion-hero.png");

  background-size: cover;
  background-position: center bottom;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 60%, rgba(0, 183, 255, 0.18), transparent 35%),
    radial-gradient(circle at 20% 20%, rgba(0, 102, 255, 0.18), transparent 25%);
  z-index: 1;
  pointer-events: none;
}

.stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(#ffffff 1px, transparent 1px),
    radial-gradient(#00b7ff 1px, transparent 1px);
  background-size: 80px 80px, 130px 130px;
  opacity: 0.12;
  animation: starsMove 18s linear infinite;
  z-index: 1;
}

@keyframes starsMove {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-80px);
  }
}

.hero-content {
  position: relative;
  z-index: 5;
  max-width: 690px;
  margin-top: -30px;
}

.badge {
  display: inline-block;
  padding: 11px 20px;
  border: 1px solid rgba(0, 183, 255, 0.6);
  border-radius: 50px;
  color: #a9ecff;
  background: rgba(0, 183, 255, 0.1);
  box-shadow: 0 0 25px rgba(0, 183, 255, 0.16);
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(58px, 10vw, 118px);
  letter-spacing: 7px;
  line-height: 0.95;
  background: linear-gradient(90deg, #ffffff, #8fe9ff, #0077ff, #ffffff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 45px rgba(0, 183, 255, 0.2);
}

.hero h2 {
  font-size: clamp(26px, 4vw, 46px);
  margin: 22px 0;
  color: #ffffff;
}

.hero p {
  max-width: 620px;
  color: #c8d8ed;
  font-size: 18px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 15px 26px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 800;
  transition: 0.3s;
}

.primary {
  color: white;
  background: linear-gradient(135deg, #00b7ff, #005dff);
  box-shadow: 0 0 32px rgba(0, 183, 255, 0.42);
}

.primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 45px rgba(0, 183, 255, 0.7);
}

.secondary {
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.05);
}

.secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.scroll-indicator {
  position: absolute;
  bottom: 28px;
  left: 8%;
  z-index: 5;
  color: #83dfff;
  font-size: 14px;
  opacity: 0.85;
}

/* SECTIONS */
.section {
  padding: 95px 8%;
  text-align: center;
  background: linear-gradient(180deg, #030712, #071225);
}

.section h2,
.vision h2,
.contact h2 {
  font-size: clamp(34px, 5vw, 54px);
  margin-bottom: 16px;
}

.section-subtitle {
  color: #b7c9df;
  max-width: 760px;
  margin: 0 auto 48px;
  line-height: 1.6;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.card {
  text-align: left;
  padding: 30px;
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.03));
  border: 1px solid rgba(0, 183, 255, 0.18);
  min-height: 240px;
  transition: 0.3s;
}

.card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 183, 255, 0.65);
  box-shadow: 0 0 35px rgba(0, 183, 255, 0.13);
}

.card span {
  font-size: 34px;
}

.card h3 {
  margin: 18px 0 12px;
  color: #87e4ff;
  font-size: 22px;
}

.card p {
  color: #c8d8ed;
  line-height: 1.6;
}

/* VISION */
.vision {
  padding: 95px 8%;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 40px;
  align-items: center;
  background:
    radial-gradient(circle at 70% 40%, rgba(0, 183, 255, 0.12), transparent 35%),
    #030712;
}

.vision p {
  color: #c8d8ed;
  font-size: 18px;
  line-height: 1.8;
}

.vision-box {
  padding: 34px;
  border-radius: 28px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(0, 183, 255, 0.28);
  box-shadow: 0 0 35px rgba(0, 183, 255, 0.08);
}

.vision-box h3 {
  color: #87e4ff;
  margin-bottom: 14px;
}

/* CONTACT */
.contact {
  text-align: center;
  padding: 100px 8%;
  background:
    linear-gradient(rgba(3,7,18,0.88), rgba(3,7,18,0.96)),
    url("../imagenes/veltrion-hero.png");
  background-size: cover;
  background-position: center bottom;
}

.contact p {
  color: #c8d8ed;
  font-size: 18px;
  margin-bottom: 28px;
}

.contact-data {
  margin-top: 30px;
}

footer {
  padding: 25px 8%;
  text-align: center;
  color: #8ca3bd;
  border-top: 1px solid rgba(255,255,255,0.08);
  background: #02050e;
}

/* MOBILE */
@media (max-width: 900px) {
  .header nav {
    display: none;
  }

  .header {
    padding: 16px 6%;
  }

  .brand {
    font-size: 21px;
  }

  .hero {
    min-height: 100vh;
    padding: 115px 6% 80px;
    background-position: center bottom;
  }

  .hero-content {
    margin-top: -70px;
  }

  .hero p {
    font-size: 16px;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .vision {
    grid-template-columns: 1fr;
  }

  .scroll-indicator {
    left: 6%;
  }
}