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

body {
  font-family: "Poppins", sans-serif;
  background: #0d0d0d;
  color: #fff;
  line-height: 1.6;
}

/* Header con imagen de fondo estilo portada */
.header {
  width: 100%;
  height: 45vh;
  background: url("https://i.imgur.com/k6khp7c.jpeg") center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.header-overlay {
  background: rgba(0, 0, 0, 0.6);
  padding: 40px;
  text-align: center;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

.header p {
  margin-top: 10px;
  font-size: 1.1rem;
  opacity: 0.8;
}

.container {
  width: 90%;
  max-width: 900px;
  margin: 40px auto;
}

.section {
  margin-bottom: 40px;
}

.section h2 {
  margin-bottom: 15px;
  font-size: 1.6rem;
  font-weight: 600;
  color: #ff3cac;
}

.section p,
.section ul {
  font-size: 1rem;
  opacity: 0.9;
}

ul {
  padding-left: 20px;
}

.sublist {
  padding-left: 20px;
  margin-top: 10px;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 15px;
}

.tech-grid span {
  padding: 10px;
  background: #1a1a1a;
  border: 1px solid #333;
  text-align: center;
  border-radius: 6px;
}

.back-button {
  text-align: center;
  margin: 40px 0;
}

.back-button a {
  color: #ff3cac;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid #ff3cac;
  padding-bottom: 4px;
}

.footer {
  text-align: center;
  padding: 25px;
  margin-top: 50px;
  font-size: 0.9rem;
  opacity: 0.6;
}