:root{
  --accent: #C3567E;
  --accent-dark: #b04466;
  --bg: #050505;
  --content-bg: #ffffff;
  --text-dark: #111;
  --nav-text: #000;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: var(--bg);
  color: #fff;
  line-height: 1.45;
}

header {
  background-color: var(--accent);
  padding: 16px;
  text-align: center;
}

header h1 { margin: 0; font-size: 1.6rem; }

nav {
  background: var(--accent-dark);
  padding: 10px;
  text-align: center;
}

.main-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
}

.main-nav a {
  color: var(--nav-text);
  text-decoration: none;
  font-weight: bold;
  padding: 6px 10px;
  background: #ffd6e6;
  border-radius: 4px;
}

.container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  max-width: 1100px;
  margin: 20px auto;
  padding: 0 16px;
}

.content {
  background: var(--content-bg);
  color: var(--text-dark);
  padding: 20px;
  flex: 1 1 65%;
  min-width: 280px;
  border-radius: 6px;
}

.sidebar {
  flex: 1 1 30%;
  min-width: 220px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar a {
  display: block;
  background: var(--accent);
  padding: 12px;
  text-decoration: none;
  color: #000;
  border-radius: 4px;
}

.student-photo {
  display: block;
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 12px;
}

.photo-link { display: inline-block; }

footer {
  background: var(--accent-dark);
  text-align: center;
  padding: 12px;
  color: #fff;
  margin-top: 20px;
}

/* Utility: visually hidden for accessibility */
.visually-hidden {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Small helpers */
h2, h3 { margin-top: 0; }
ul { padding-left: 1.2rem; }
a.external::after { content: " ↗"; font-size: 0.9em; }

/* Responsive adjustments */
@media (max-width: 800px) {
  .container { flex-direction: column; }
  .main-nav { justify-content: center; }
}