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

body {
  font-family: Arial, sans-serif;
}

.borde {
    width: 60px;
    height: 60px;
    border: 2px solid black;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    background-color: gray;
}

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

body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f6f8;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
}

.header {
    background: #1f2933;
    color: #fff;
    padding: 1rem 0;
}

.header h1 {
    display: inline-block;
}

.nav {
    list-style: none;
    float: right;
}

.nav li {
    display: inline-block;
    margin-left: 20px;
}

.nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
}

.nav a:hover {
    color: #38bdf8;
}

.hero {
    background: linear-gradient(135deg, #38bdf8, #0ea5e9);
    color: #fff;
    text-align: center;
    padding: 2rem 1rem;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.btn {
    background: #fff;
    color: #0ea5e9;
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
}

.btn:hover {
    background: #e0f2fe;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin: 3rem auto;
}

.card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    text-align: center;
}

.card h3 {
    margin-bottom: 1rem;
    color: #0ea5e9;
}

.textocentro {
    text-align: center;
}

img {
    width: 100%;
    height: auto;
}