:root {
  --langit: #3a7ca5;
  --kapur: #e8c547;
  --kertas: #f8efe4;
  --tinta: #2d3a44;
  --garis: #e3d4c2;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Trebuchet MS", "Verdana", sans-serif;
  background: var(--kertas);
  color: var(--tinta);
  line-height: 1.6;
}
a { color: var(--langit); }
.kapur {
  height: 10px;
  background:
    repeating-linear-gradient(90deg, var(--langit) 0 16px, var(--kapur) 16px 28px, #f4a261 28px 36px, var(--kertas) 36px 48px);
}
.papan {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 5vw;
  background: #fff;
}
.papan img { width: 56px; height: 56px; }
.papan h1 { margin: 0; font-size: 24px; color: var(--langit); }
.papan h1 a { color: inherit; text-decoration: none; }
.papan p { margin: 3px 0 0; color: #c9891a; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.tas {
  display: flex;
  flex-wrap: wrap;
  background: var(--langit);
}
.tas a {
  color: #fff;
  text-decoration: none;
  padding: 11px 16px;
  font-size: 14px;
}
.tas a:hover, .tas a.buka { background: var(--kapur); color: #2d3a44; }
.meja-kecil { width: min(960px, 92vw); margin: 26px auto 60px; }
.kartu-huruf {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 18px;
  align-items: center;
}
.kartu-huruf h2 { margin: 0 0 12px; font-size: clamp(26px, 4vw, 36px); color: var(--langit); }
.kartu-huruf img { width: 100%; border-radius: 20px; }
.kotak {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}
.kotak a {
  background: #fff;
  border: 1px solid var(--garis);
  border-radius: 16px;
  padding: 16px;
  text-decoration: none;
  color: inherit;
}
.lembar {
  background: #fff;
  border: 1px solid var(--garis);
  border-radius: 16px;
  padding: 26px 28px;
}
.lembar h2 { margin-top: 0; color: var(--langit); }
.mulai {
  display: inline-block;
  background: var(--langit);
  color: #fff;
  text-decoration: none;
  padding: 9px 16px;
  border-radius: 999px;
}
.rak {
  padding: 22px 5vw 36px;
  font-size: 13px;
}
.rak a { margin-right: 12px; }
@media (max-width: 760px) {
  .kartu-huruf, .kotak { grid-template-columns: 1fr; }
}