:root {
  --gray-dark: #4a4a4a;
  --gray-light: #f5f5f5;
  --text-color: #333;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #fff;
  /* Fondo con rayas verticales sutiles */
  background-image: linear-gradient(90deg, #f0f0f0 1px, transparent 1px);
  background-size: 100px 100%;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 5%;
  position: relative;
  float: right;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  margin-right: 25px;
  font-weight: 500;
}

.brand-logo {
  display: flex;
  gap: 10px;
  width: 115px;
}
.brand-logo img {
  width: 100%;
}
.logo-icon {
  width: 30px;
  height: 30px;
  border: 2px solid #000;
  position: relative;
}

/* Hero Section */
.hero-section {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  min-height: 100vh;
  padding: 0% 2%;
  align-items: center;
  width: 100vw;
  top: 6%;
  position: fixed;
}

/* Caja de Título Superior con Borde */
.title-box {
  border: 4px solid var(--gray-dark);
  display: inline-block;
  padding: 10px 30px;
  margin-bottom: 10px;
}

.top-title {
  font-size: 2.5rem;
  color: var(--gray-dark);
  letter-spacing: 2px;
}

.main-title {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--gray-dark);
  margin-bottom: 15px;
}

/* Sub-header con líneas laterales */
.sub-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.line {
  height: 4px;
  width: 200px;
  background-color: var(--gray-dark);
}

.accent-text {
  font-weight: bold;
  letter-spacing: 1px;
}

.description {
  max-width: 500px;
  line-height: 1.6;
  color: #666;
  margin-bottom: 30px;
}

/* Iconos Sociales */
.social-icons {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
}

.icon-circle {
  width: 35px;
  height: 35px;
  background-color: var(--gray-dark);
  color: white;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.8rem;
  cursor: pointer;
}

/* Botón principal */
.btn-learn {
  background-color: var(--gray-dark);
  color: white;
  padding: 15px 40px;
  border: none;
  font-weight: bold;
  font-size: 1.2rem;
  cursor: pointer;
  transition: 0.3s;
}

.btn-learn:hover {
  background-color: #000;
}

/* Imagen */
.hero-image img {
  width: 90%;
  filter: grayscale(100%); /* Efecto blanco y negro */
  display: block;
}

/* Responsividad básica */
@media (max-width: 900px) {
  .hero-section {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .sub-header {
    justify-content: center;
  }
}