/* Globals */

* { 
  box-sizing: border-box;
} 

html, body {
  height: 100%;
  font-family: serif;
  font-size: 1.1rem;
  background-color: #252025
}

body {
  margin: 0;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
}

h1 {
  font-size: clamp(1.2rem, 4vw, 2rem);
}

h2, h3 {
  font-size: clamp(0.9rem, 2.5vw, 1.3rem);
}

[class*="col-"] {
  padding: 15px;
}

.col-3 {
  flex: 0 0 auto;
  width: 25%;
}

.col-9 {
  flex: 1 1 auto;
}

.row {
  display: flex;
  align-items: center;
}

.subtitle {
  color: #ccc;
  margin-bottom: 1.5rem;
}

a {
  color: #78f;
  text-decoration: none;
}

a:hover, a:active {
  color: #fa6;
}

.icon {
  margin-right: 0.8rem;
}

/* Content */

.flex-container {
  position: fixed;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.box {
  width: 100%;
  max-width: 980px;
  min-width: 320px;
  padding: 2rem 3rem;
  padding-right: 1rem;
  background-color: #212;
  border-radius: 2rem;
}

.avatar > img {
  border-radius: 1rem;
  max-width: 100%;
  height: auto;
  overflow: hidden;
}

#contact-info {
  margin: 2rem;
  padding: 1rem 2rem;
  background-color: #323;
  border-radius: 1rem;
  color: #ede;
}

#contact-info h2 {
  margin-bottom: 0;
  padding-bottom: 0;
}

#contact-info h3 {
  margin-top: 0;
  padding-top: 0;
}

#contact-info ul {
  padding: 0;
  list-style-type: none;
}

#contact-info li {
  margin: 0.5rem 0;
}

#contact-info img {
  width: 25px;
  height: auto;
  margin-right: 0.5rem;
}

#certificate img {
  width: 110px;
  height: auto;
  padding: 0;
  margin: 0;
  padding-top: 1rem;
  padding-right: 0.5rem;
}

/* Responsive design */
@media (max-width: 768px) {
  body {
    min-height: calc(100vh + 1rem);
  }

  .flex-container {
    position: relative;
    padding: 1rem;
    align-items: flex-start;
  }

  .box {
    padding: 2rem 4rem;
  }

  .row {
    flex-direction: column;
  }

  [class*="col-"] {
    width: 100%;
    float: none;
  }

  #avatar {
    text-align: center;
    margin-bottom: 1rem;
  }

  #avatar > img {
    max-width: 200px;
  }

  #contact-info {
    padding: 1rem 2rem;
  }
}