:root {
  --ink: #1a1a1a;
  --cream: #fff8ec;
  --red: #e8231a;
  --blue: #1f1f8c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: 'Nunito', 'Trebuchet MS', sans-serif;
  color: var(--ink);
  background: linear-gradient(
    180deg,
    #2a7fc8 0%,
    #3d9fe8 30%,
    #7ec8f5 70%,
    #a8daf8 100%
  );
  line-height: 1.55;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.card {
  background: var(--cream);
  border: 3px solid var(--ink);
  border-radius: 18px;
  box-shadow: 0 5px 0 var(--ink);
  padding: 28px 24px;
}

h1,
h2,
h3 {
  font-family: 'Fredoka', sans-serif;
  font-style: italic;
}

h1 {
  margin: 0 0 12px;
  font-size: 2rem;
  color: var(--red);
}

h2 {
  margin: 22px 0 8px;
  font-size: 1.35rem;
  color: var(--red);
}

h3 {
  margin: 16px 0 6px;
  font-size: 1.05rem;
  color: var(--blue);
}

p,
li {
  margin: 0 0 10px;
  font-weight: 700;
}

ol,
ul {
  margin: 0 0 10px;
  padding-left: 1.2em;
}

a {
  color: var(--red);
  font-weight: 800;
}

.back {
  display: inline-block;
  margin-bottom: 16px;
  font-family: 'Fredoka', sans-serif;
  font-weight: 700;
  color: var(--ink);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
}

.archive-heading {
  text-align: center;
}

.period {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 4px 0 8px;
}

.period__date {
  margin: 0;
  min-width: 12ch;
  text-align: center;
  font-family: 'Fredoka', sans-serif;
  font-weight: 700;
  font-style: italic;
  font-size: 1.2rem;
  color: var(--red);
  text-shadow:
    1px 1px 0 var(--blue),
    2px 2px 0 var(--blue),
    3px 3px 0 var(--blue);
}

.period__arrow {
  width: 40px;
  height: 40px;
  border: 3px solid var(--blue);
  border-radius: 999px;
  background: #fff8ec;
  color: var(--ink);
  font-family: 'Fredoka', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 3px 0 var(--blue);
}

.period__arrow:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--blue);
}

.period__arrow:disabled {
  opacity: 0.35;
  cursor: default;
  box-shadow: none;
}

.days {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.days li {
  display: none;
  margin: 0;
  justify-content: center;
  gap: 22px;
}

.days li.is-current {
  display: flex;
}

.days a {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.15rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 2px solid rgba(31, 31, 140, 0.16);
  font-family: 'Fredoka', sans-serif;
}

.tiers {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tiers li {
  display: grid;
  grid-template-columns: 5.4rem minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  margin: 0;
  padding: 8px 10px;
  border: 2.5px solid var(--blue);
  border-radius: 12px;
  background: #fff;
}

.tiers strong {
  font-family: 'Fredoka', sans-serif;
}

@media (max-width: 380px) {
  .tiers li {
    grid-template-columns: 1fr auto;
  }

  .tiers span {
    grid-column: 1 / -1;
  }
}