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

body {
  font-family: 'Inter', sans-serif;
  background: white;
  color: black;
  line-height: 1.6;
  padding: 2rem;
  transition: background 0.3s, color 0.3s;
}

.container {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: 2px;
}

.subtitle {
  margin: 1rem 0;
  font-size: 1.2rem;
}

button {
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  border: 2px solid black;
  background: none;
  cursor: pointer;
  margin-top: 1rem;
}

button:hover {
  background: black;
  color: white;
}

.toggle-theme {
  position: absolute;
  top: 0;
  right: 0;
  cursor: pointer;
  font-size: 1.2rem;
}

section {
  margin: 3rem 0;
  border-top: 1px solid #ccc;
  padding-top: 2rem;
}

h2 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.card-container {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.card {
  border: 2px solid black;
  padding: 1rem;
  flex: 1 1 30%;
  min-width: 250px;
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card a {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.4rem 0.8rem;
  border: 1px solid black;
  text-decoration: none;
  color: black;
}

.card a:hover {
  background: black;
  color: white;
}

.stack {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.stack span {
  border: 1px solid black;
  padding: 0.4rem 0.8rem;
  background: none;
}

a {
  color: black;
  text-decoration: underline;
}

.dark {
  background: #121212;
  color: #eee;
}

.dark button,
.dark .card,
.dark .stack span {
  border-color: #eee;
  color: #eee;
}

.dark a {
  color: #eee;
}

.dark button:hover,
.dark .card a:hover {
  background: #eee;
  color: #121212;
}