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

/* ===== GLOBAL ===== */
body {
  font-family: "Fira Code", monospace;
  background-color: #0d1117;
  color: #c9d1d9;
  line-height: 1.6;
  padding: 2rem;
}

/* ===== HEADER ===== */
header {
  text-align: center;
  margin-bottom: 3rem;
}

header h1 {
  font-size: 2.5rem;
  color: #58a6ff;
}

header p {
  color: #8b949e;
  margin-top: 0.5rem;
}

/* ===== MAIN GRID ===== */
main {
  display: grid;
  grid-template-columns: repeat(auto-fit, 280px);
  gap: 1.5rem;
  justify-content: center;
}


/* ===== CATEGORY CARDS ===== */
.category {
  background-color: #161b22;
  border-radius: 8px;
  padding: 1.5rem;
  border-left: 5px solid #58a6ff;

  display: grid;
  grid-template-rows: auto 1fr;
  gap: 1rem;

  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.category:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 20px rgba(88, 166, 255, 0.15);
}

.category h2 {
  min-height: 4.5rem;
  font-size: 1.3rem;
  color: #58a6ff;

  display: flex;
  align-items: center;
  justify-content: center; /* horizontal centering */
  text-align: center;       /* centers multi-line text */
}

/* ===== LINKS ===== */
.category ul {
  list-style: none;
  text-align: center;
}

.category li {
  margin: 0.5rem 0;
}

.category a {
  text-decoration: none;
  color: #c9d1d9;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  display: inline-block;
  transition: background 0.2s ease, color 0.2s ease;
}

.category a:hover {
  background-color: #238636;
  color: #ffffff;
}

/* ===== FOOTER ===== */
footer {
  text-align: center;
  margin-top: 4rem;
  color: #8b949e;
  font-size: 0.9rem;
}

.category h2 a {
  color: #58a6ff;
  text-decoration: none;
  display: inline-block;
}

.category h2 a:hover {
  text-decoration: underline;
}