* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: linear-gradient(135deg, #4e54c8, #8f94fb);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.app {
  width: 100%;
  max-width: 390px;
  background: #ffffff;
  border-radius: 30px;
  overflow: hidden;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.header {
  background: linear-gradient(135deg, #ff7e5f, #feb47b);
  color: white;
  text-align: center;
  padding: 20px;
}

.header h1 {
  font-size: 1.8rem;
}

.header p {
  margin-top: 5px;
  font-size: 0.95rem;
}

.perfil {
  background: #fff4ef;
  text-align: center;
  padding: 15px;
  border-bottom: 1px solid #eee;
}

.perfil h2 {
  color: #ff7e5f;
  margin-bottom: 5px;
}

.menu {
  display: flex;
  justify-content: space-around;
  padding: 15px;
  gap: 10px;
}

.menu button {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 12px;
  background: #4e54c8;
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: 0.3s;
}

.menu button:hover {
  background: #373cc0;
}

main {
  padding: 15px;
}

.seccion {
  display: none;
}

.seccion.activa {
  display: block;
}

.seccion h2 {
  margin-bottom: 12px;
  color: #4e54c8;
}

.card {
  background: #f7f7ff;
  border-left: 6px solid #ff7e5f;
  border-radius: 14px;
  padding: 15px;
  margin-bottom: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.card h3 {
  color: #ff7e5f;
  margin-bottom: 6px;
}

.card p {
  color: #444;
  line-height: 1.5;
}

.footer {
  display: flex;
  justify-content: space-around;
  background: #4e54c8;
  color: white;
  padding: 15px;
  font-size: 1.4rem;
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.5rem;
  }

  .menu {
    flex-direction: column;
  }

  .menu button {
    width: 100%;
  }
}