.kr-letter {
  --paper: #d6c49a;
  --paper-dark: #a98e5b;
  --ink: #281b16;
  --wax: #701b1d;
  --gold: #c8a75d;

  max-width: 620px;
  margin: 45px auto;
  font-family: Georgia, serif;
  text-align: center;
}

.kr-letter__paper {
  position: relative;
  overflow: hidden;
  color: var(--ink);
  background:
    repeating-linear-gradient(
      0deg,
      transparent 0 18px,
      rgba(76, 48, 20, .06) 19px 20px
    ),
    linear-gradient(90deg, #b99d69, var(--paper) 14% 86%, #b99d69);
  border: 1px solid var(--paper-dark);
  box-shadow: inset 0 0 30px rgba(53, 31, 12, .18), 0 14px 25px rgba(0, 0, 0, .3);
}

.kr-letter__fold {
  position: absolute;
  z-index: 2;
  right: 0;
  left: 0;
  height: 2px;
  background: rgba(70, 45, 20, .45);
  box-shadow: 0 2px 5px rgba(0, 0, 0, .16);
  transition: opacity .3s ease;
}

.kr-letter__fold--top {
  top: 68px;
}

.kr-letter__fold--bottom {
  top: 136px;
}

.kr-letter__front {
  display: grid;
  gap: 5px;
  height: 203px;
  place-content: center;
  color: #6f5631;
  background: linear-gradient(#d1bd8e, #bca270);
  transition: opacity .3s ease, transform .45s ease;
}

.kr-letter__front span,
.kr-letter__ornament {
  color: var(--gold);
  font-size: 22px;
}

.kr-letter__seal {
  position: absolute;
  z-index: 4;
  top: 112px;
  left: 50%;
  display: grid;
  width: 76px;
  height: 76px;
  place-items: center;
  padding: 0;
  color: var(--gold);
  font-family: Georgia, serif;
  font-size: 30px;
  cursor: pointer;
  background:
    radial-gradient(circle at 30% 25%, rgba(255,255,255,.28) 0 6%, transparent 7%),
    linear-gradient(135deg, #8e2928, var(--wax));
  border: 2px solid var(--gold);
  border-radius: 48% 52% 45% 55%;
  box-shadow: 0 0 0 5px #bca270, 0 7px 12px rgba(0, 0, 0, .35);
  transform: translateX(-50%);
  transition: transform .3s ease, opacity .25s ease;
}

.kr-letter__seal:hover {
  transform: translateX(-50%) rotate(-8deg) scale(1.08);
}

.kr-letter__sheet-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .7s ease;
}

.kr-letter__sheet {
  min-height: 0;
  overflow: hidden;
  display: grid;
  gap: 16px;
  padding: 0 38px;
  background: var(--paper);
  text-align: left;
  transition: padding .7s ease, opacity .3s ease;
  opacity: 0;
}

.kr-letter__sheet h3 {
  margin: 0;
  text-align: center;
}

.kr-letter__sheet h3 a,
.kr-letter__read {
  color: var(--ink);
}

.kr-letter__description {
  line-height: 1.6;
}

.kr-letter__read {
  text-align: center;
  font-weight: bold;
}

.kr-letter__ornament {
  justify-self: center;
}

.kr-letter__close-wrap {
  display: none;
  justify-content: center;
  margin-top: 16px;
}

.kr-letter__close {
  padding: 10px 20px;
  color: var(--paper);
  font-family: Georgia, serif;
  cursor: pointer;
  background: #3b261c;
  border: 1px solid var(--gold);
}

.kr-letter.is-open .kr-letter__sheet-wrap {
  grid-template-rows: 1fr;
}

.kr-letter.is-open .kr-letter__sheet {
  padding-top: 38px;
  padding-bottom: 34px;
  opacity: 1;
}

.kr-letter.is-open .kr-letter__front,
.kr-letter.is-open .kr-letter__fold {
  opacity: 0;
}

.kr-letter.is-open .kr-letter__seal {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-58px) scale(.7);
}

.kr-letter.is-open .kr-letter__close-wrap {
  display: flex;
}