/* Global config */
* {
  box-sizing: border-box;
}

:root {
  font-size: 16px;
}

body {
  background-color: var(--c-global-bg)
}

/* colors */
:root {
  --c-m-bg-0: #FFFFFF;
  --c-m-bg-1: #F4F4F4;
  --c-m-bg-2: #E5E9ED;
  --c-m-bg-3: #C2E7FF;
  --c-m-bg-4: #B8DBF0;

  --c-m-ft: #1F1F1F;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-m-bg-0: #1F1F1F;
    --c-m-bg-1: #2D2F31;
    --c-m-bg-2: #383B3C;
    --c-m-bg-3: #004A77;
    --c-m-bg-4: #0F547D;

    --c-m-ft: #E3E3E3;
  }
}

:root {
  --c-global-bg: var(--c-m-bg-1);
  --c-item-bg: var(--c-m-bg-2);
  --c-item-bg-hover: var(--c-m-bg-4);
  --c-item-bg-hl: var(--c-m-bg-3);
  --c-item-bg-hl-hover: var(--c-m-bg-4);
}

* {
  color: var(--c-m-ft);
}

/* main panel */

main {
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  width: 52rem;
  max-width: 100%;
  padding: 4rem 1rem 3rem 1rem;
}

/* big title */

.big_title {
  padding-bottom: 2.5rem;
}

.big_title h1 {
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
}

.big_title h1,
.big_title p {
  text-align: center;
}

h2 { font-size: 1.625rem; }


/* section layout */

section {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;

  margin-top: 1.5rem;
}

section .item_container {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(auto-fit, minmax(9rem, max-content));
  grid-gap: 0.5rem;
  justify-content: center;
}

h2 {
  text-align: center;
  width: 100%;
  margin-bottom: 2rem;
}


/* item layout */
.item {
  width: 9rem;
  border: 1px solid var(--c-border);
  border-radius: 0.5rem;
  padding: 0.5rem 0.25rem;

  background-color: var(--c-item-bg);
}
.item.highlight       { background-color: var(--c-item-bg-hl); }
.item.highlight:hover { background-color: var(--c-item-bg-hl-hover); }
.item:hover           { background-color: var(--c-item-bg-hover); }

/* item text */
a { text-decoration: none; }
dl * { line-height: 1.2; }
dt { font-size: 1rem; font-weight: 500; }
dd { font-size: 0.875rem; }

dt, dd { text-align: center; }

dt { margin-bottom: 0.5rem; }