.guide-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}
.guide-site .site-header,
.guide-site .site-footer {
  max-width: 1440px;
  margin: 0 auto;
}
.skip-link {
  position: absolute;
  top: 0;
  left: 1.25rem;
  padding: 0.7rem 1rem;
  background: #fff;
  transform: translateY(-110%);
}
.skip-link:focus {
  transform: translateY(0);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  color: #53675e;
  font-size: 0.85rem;
}
.breadcrumbs li + li::before {
  content: '/';
  margin-right: 0.5rem;
}
.guide-intro {
  padding: 3.5rem 0 1rem;
}
.guide-intro h1 {
  max-width: 850px;
  font-size: clamp(2.2rem, 5vw, 3.7rem);
  letter-spacing: -0.04em;
  line-height: 1.12;
}
.guide-intro .lead {
  max-width: 760px;
}
.guide-main section,
.guide-next {
  margin-top: 2.7rem;
  padding-top: 1.8rem;
  border-top: 1px solid #dbe4de;
  scroll-margin-top: 1.5rem;
}
.guide-main h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  line-height: 1.2;
  color: #173a34;
}
.guide-main h3 {
  margin: 1.8rem 0 0.6rem;
  color: #183d38;
}
.guide-main p,
.guide-main li {
  max-width: 760px;
}
.guide-main li {
  margin-block: 0.65rem;
}
.contents {
  padding: 1.5rem;
  border: 1px solid #dbe4de;
  border-radius: 12px;
  background: #fff;
}
.contents ul {
  margin-bottom: 0;
  padding-left: 1.2rem;
}
.worked-board {
  margin: 2rem 0;
}
.worked-board figcaption,
.water-state figcaption {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #455850;
}
.sudoku-board {
  width: min(100%, 460px);
  table-layout: fixed;
  border-collapse: collapse;
  background: #fff;
  text-align: center;
}
.sudoku-board caption {
  margin-bottom: 1rem;
  text-align: left;
  font-weight: 650;
}
.sudoku-board th {
  font-size: 0.75rem;
  font-weight: 500;
  color: #53675e;
}
.sudoku-board td {
  height: clamp(28px, 5vw, 43px);
  padding: 0;
  border: 1px solid #9eafa7;
  font-size: clamp(1rem, 2.7vw, 1.3rem);
  font-variant-numeric: tabular-nums;
}
.sudoku-board thead td {
  border: 0;
  background: #f7f8f5;
}
.sudoku-board tbody tr:first-child td {
  border-top: 3px solid #345b4e;
}
.sudoku-board tbody td:first-of-type {
  border-left: 3px solid #345b4e;
}
.sudoku-board .box-right {
  border-right: 3px solid #345b4e;
}
.sudoku-board .box-bottom {
  border-bottom: 3px solid #345b4e;
}
.sudoku-board .target {
  background: #d6ede4;
  outline: 3px solid #17695c;
  outline-offset: -4px;
  font-weight: 750;
}
.reasoning > div {
  max-width: 760px;
  margin-block: 1.4rem;
}
.reasoning dt {
  color: #183d38;
  font-weight: 700;
}
.reasoning dd {
  margin: 0.5rem 0 0;
}
.answer {
  padding: 1.2rem;
  border-left: 4px solid #17695c;
  background: #e9f2ec;
}
.pour-sequence {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}
.water-state {
  margin: 0;
  padding: 1.2rem;
  border: 1px solid #dbe4de;
  border-radius: 12px;
  background: #fff;
}
.bottles {
  display: flex;
  justify-content: space-around;
  gap: 0.8rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.bottles li {
  flex: 1;
  max-width: 92px;
  text-align: center;
}
.bottle {
  display: flex;
  flex-direction: column-reverse;
  overflow: hidden;
  margin-top: 0.5rem;
  border: solid #456c61;
  border-width: 0 2px 3px;
  border-radius: 0 0 14px 14px;
}
.layer {
  display: flex;
  min-height: 52px;
  justify-content: center;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 650;
}
.layer.blue {
  background: #b7d7ef;
  color: #153b60;
}
.layer.coral {
  background: #f5c2ac;
  color: #692f1f;
}
.layer.empty {
  background: #f1f5f2;
  color: #53675e;
  font-weight: 400;
}
.guide-next {
  margin-top: 3rem;
}
.guide-next .primary-link {
  max-width: 100%;
}
@media (max-width: 620px) {
  .guide-site .site-header {
    flex-wrap: wrap;
    gap: 0.8rem;
  }
  .guide-site .site-header nav {
    gap: 0.85rem;
  }
  .guide-main {
    padding-inline: 1.25rem;
  }
  .guide-intro {
    padding-top: 2.5rem;
  }
  .pour-sequence {
    grid-template-columns: 1fr;
  }
}