/* Reset & Base */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  color: #222;
  font-family: sans-serif;
  line-height: 1.5;
  margin: 1rem;
}

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

/* Page Layout */
.page-container {
  display: flex;
  flex-direction: column; /* Mobile-first: vertical stack */
  min-height: 90vh;
}

header {
  margin-bottom: 1rem;
  word-wrap: normal;
}

main {
  padding: 10px 0 0 0;
  max-width: 100%;
}

footer {
  border-top: 1px solid #222;
  margin-top: 1rem;
}

/* Elements */
a {
  color: #00e;
  text-decoration: none;
}

h1 a {
  color: #000;
  text-decoration: none;
}

.header_gif {
  width: 100%;
  height: auto;
  display: block;
}

.divider {
  width: 1px;
  background-color: #222;
  align-self: stretch;
  margin-left: 5px;
}

/* Navigation */
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

nav li {
  position: relative;
  display: inline-block; /* Mobile: horizontal menu */
  width: auto;
}

nav li::before {
  /* content: "/"; */
  margin-right: 0.5rem;
}

/* Responsive Layout: Desktop */
@media (min-width: 950px) {
  .page-container {
    flex-direction: row;    /* Sidebar + main */
    gap: 2rem;
    align-items: flex-start;
  }

  header {
    width: 20%;           /* Sidebar width */
    flex-shrink: 0;
  }

  main {
    max-width: 60%;
    padding-left: 20px;
  }

  nav li {
    display: block;         /* Vertical list in sidebar */
    width: 100%;
  }

  nav .has-dropdown > ul {
    top: 0;
    left: 100%;
  }
}