:root {
  --bg-color: #fff;
  --primary-color: #1a274b;
  --text-color: #2c2c2c;
  --text-sub-color: #666;
  --border-color: #ccc;
  --shadow-color: rgba(0, 0, 0, 0.2);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #09090a;
    --text-color: #fff;
    --text-sub-color: #ccc;
    --border-color: #888;
    --shadow-color: rgba(255, 255, 255, 0.2);
  }
}

html,
body {
  margin: 0;
  width: 100dvw;
  height: 100dvh;
  background-color: var(--bg-color);
  color: var(--text-color);
}

h1 {
  font-family: Arial, Helvetica, sans-serif;
}

h2 {
  border-left: 0.5rem solid var(--primary-color);
  padding: 0.25rem 0 0.25rem 1rem;
}

li {
  line-height: 1.75;
}

section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.navbar {
  padding-top: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.navbar-logo {
  width: auto;
  height: 3rem;
  color: var(--primary-color);

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

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
}

.cards {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.cards.narrow {
  grid-template-columns: 1fr;
}

.card {
  display: block;
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
  transition: box-shadow 0.1s ease-in-out;
}

.card:hover {
  box-shadow: 0 2px 8px var(--shadow-color);
}

.card-image {
  width: 100%;
  object-fit: cover;
  border-bottom: 1px solid var(--border-color);
}

.card-text {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--text-color);
}

.card-description {
  font-size: 1rem;
  color: var(--text-sub-color);
}

a {
  text-decoration: none;
}

p {
  margin: 0;
}

main.container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1rem;
}

@media (width < 768px) {
  .navbar {
    padding: 0 1rem;
    .container {
      padding: 0;
    }
  }
}

@media (width >= 560px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .cards.narrow {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (width >= 768px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .cards.narrow {
    grid-template-columns: repeat(4, 1fr);
  }
}

.button {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 0.25rem;
  text-align: center;
  text-decoration: none;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s ease-in-out;

  &:hover, &:focus {
    opacity: 0.85;
  }
}