:root {
  --paper: #f2ecdf;
  --ink: #1c1914;
  --muted: #5e584e;
  --line: #d4c9b6;
  --seal: #8e2f2a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Yu Gothic UI", "Yu Gothic", "Hiragino Sans", Meiryo, sans-serif;
  font-size: 17px;
  line-height: 1.75;
}

.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 28px 56px;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin: 0;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.top p {
  margin: 0;
}

.seal {
  color: var(--seal);
  letter-spacing: 0.22em;
}

.en {
  margin: 64px 0 0;
  color: var(--muted);
  font-family: Palatino, "Palatino Linotype", "Times New Roman", serif;
  font-size: 14px;
  letter-spacing: 0.04em;
}

h1 {
  margin: 14px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--seal);
  font-family: "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(36px, 7vw, 60px);
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.25;
}

.lede {
  max-width: 36em;
  margin: 32px 0 0;
}

.entry {
  margin: 36px 0 0;
  font-size: 18px;
}

.entry a {
  color: var(--ink);
  text-underline-offset: 0.28em;
}

.entry a:hover {
  color: var(--seal);
}

.back {
  margin: 28px 0 0;
}

.back a {
  color: var(--ink);
  text-underline-offset: 0.25em;
}

.back a:hover {
  color: var(--seal);
}

footer {
  margin-top: auto;
  padding-top: 64px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.03em;
}

footer p {
  margin: 0;
}

@media (max-width: 560px) {
  .page {
    padding: 28px 20px 40px;
  }

  .en {
    margin-top: 40px;
    letter-spacing: 0.12em;
  }

  h1 {
    padding-left: 14px;
  }
}

body.home {
  background:
    radial-gradient(900px 420px at 0% -10%, rgba(92, 69, 120, 0.14), transparent 70%),
    radial-gradient(700px 360px at 100% 0%, rgba(201, 162, 39, 0.16), transparent 65%),
    var(--paper);
}

.sheet {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1040px;
  margin: 0 auto;
  padding: 36px 28px 48px;
}

.mast .domain {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.14em;
}

body.home h1.brand {
  width: fit-content;
  margin: 28px 0 0;
  padding: 0 0 12px;
  border: 0;
  border-bottom: 1px solid #c9a227;
  color: #2c2340;
  font-family: Palatino, "Palatino Linotype", "Times New Roman", serif;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.15;
}

body.home h1.brand span {
  color: #9a7420;
}

body.home .lede {
  max-width: 28em;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 240px;
  padding: 22px 22px 18px;
  color: inherit;
  text-decoration: none;
  background: linear-gradient(180deg, #fffdf8 0%, #f7f1e6 100%);
  border: 1px solid #e4d8c6;
  border-left-width: 6px;
  border-radius: 14px;
  box-shadow: 0 1px 0 #fff inset, 2px 3px 0 rgba(90, 70, 40, 0.12);
}

a.card:hover,
a.card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 1px 0 #fff inset, 3px 8px 0 rgba(90, 70, 40, 0.16);
  outline: none;
}

.card-skill { border-left-color: #5c4578; }
.card-calc { border-left-color: #c9a227; }
.card-note { border-left-color: var(--seal); }

.card-kicker {
  margin: 0;
  color: #8a7a62;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.card h2 {
  margin: 10px 0 0;
  font-family: "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", serif;
  font-size: 26px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.35;
}

.card p:last-of-type,
.card h2 + p {
  margin: 10px 0 0;
  color: #3f3a33;
  font-size: 15px;
  line-height: 1.7;
}

.card-go {
  margin-top: auto;
  padding-top: 22px;
  color: var(--seal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.card-calc .card-go {
  color: #8a7a62;
  font-weight: 600;
}

body.home footer {
  padding-top: 48px;
}

@media (max-width: 960px) {
  .sheet {
    padding: 28px 18px 36px;
  }

  .board {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: 0;
  }
}