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

html,
body {
  height: 100%;
}

body {
  font-family: Arial, sans-serif, system-ui;
  min-height: 100vh;
  line-height: 1.6;
  background-color: #fafafa;
  color: #222;
  display: flex;
  flex-direction: column;
}

main {
  padding: 2rem;
  max-width: 90vw;
  margin: 0 auto;
  width: 100%;
  flex: 1;
}

header,
footer {
  background-color: #123456;
  color: #fafafa;
  padding: 1rem;
}

/* Sticking header */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

header h1 {
  margin: 0;
}

nav a {
  color: #fafafa;
  margin-right: 1rem;
  text-decoration: none;
}

nav a:hover,
nav a:focus {
  text-decoration: underline;
  outline: none;
}

#intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem;
  margin: 0 auto;
}

.intro-text {
  flex: 1;
  padding-right: 2rem;
}

.container {
  width: 100%;
  height: 75vh; 
  display: flex;
  justify-content: center;
  align-items: center;
}

.container embed {
  width: 60%;
  height: 100%;
  min-height: 500px;
  border: none;
}

.portrait img {
  max-width: 200px;
  height: 300px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 16px 16px rgba(0, 0, 0, 0.15);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  #intro {
    flex-direction: column;
    text-align: center;
  }

  .intro-text {
    padding-right: 0;
    margin-bottom: 1rem;
  }

  .portrait img {
    max-width: 150px;
    height: 150px;
  }
}