:root {
  --washi: #f6f3ec;
  --washi-deep: #efeadf;
  --sumi: #1f1c1a;
  --sumi-soft: #3d3833;
  --fuji: #6c5b8e;
  --kin: #a8894e;
  --line: rgba(31, 28, 26, 0.14);
  --serif: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  --sans: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
  --en: "Cormorant Garamond", serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--serif);
  background: var(--washi);
  color: var(--sumi);
  line-height: 2.1;
  letter-spacing: 0.05em;
  word-break: normal;
  overflow-wrap: anywhere;
  line-break: normal;
  -webkit-font-smoothing: antialiased;
}
@media (min-width: 1025px) {
  body { word-break: keep-all; overflow-wrap: normal; line-break: strict; }
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ---------- header / footer ---------- */
.lib-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(18px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
  background: rgba(246, 243, 236, 0.95);
  position: sticky; top: 0; z-index: 50;
}
.lib-header .brand { display: flex; align-items: center; gap: 10px; }
.lib-header .brand img { width: 30px; }
.lib-header .name { font-size: 0.98rem; font-weight: 600; letter-spacing: 0.24em; display: block; line-height: 1.3; }
.lib-header .en { font-family: var(--en); font-size: 0.6rem; letter-spacing: 0.3em; color: var(--sumi-soft); display: block; }
.lib-header .back { font-family: var(--sans); font-size: 0.74rem; letter-spacing: 0.14em; color: var(--sumi-soft); }
.lib-header .back:hover { color: var(--fuji); }
.lib-footer {
  margin-top: clamp(60px, 10vh, 100px);
  padding: 40px 20px 30px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--sumi-soft);
}
.lib-footer p { max-width: 620px; margin: 0 auto 12px; text-align: left; line-height: 2; }
.lib-footer a { color: var(--fuji); border-bottom: 1px solid currentColor; }
.lib-footer .copy { font-family: var(--en); letter-spacing: 0.2em; margin-top: 14px; text-align: center; }

/* ---------- index ---------- */
main.index { max-width: 1080px; margin: 0 auto; padding: clamp(40px, 7vh, 70px) clamp(18px, 4vw, 44px); }
.lib-head { margin-bottom: clamp(40px, 7vh, 64px); }
.lib-head .en { font-family: var(--en); font-size: 0.75rem; letter-spacing: 0.48em; color: var(--kin); }
.lib-head h1 { font-size: clamp(1.6rem, 3.4vw, 2.2rem); font-weight: 600; letter-spacing: 0.2em; margin: 6px 0 14px; }
.lib-head .lead { font-size: 0.92rem; color: var(--sumi-soft); max-width: 640px; }
h2.gyo {
  font-size: 1rem; font-weight: 600; letter-spacing: 0.3em; color: var(--fuji);
  margin: clamp(34px, 5vh, 48px) 0 16px; padding-bottom: 8px; border-bottom: 1px solid var(--line);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: clamp(14px, 2vw, 24px);
}
.card { display: block; }
.card .photo {
  display: block; overflow: hidden; aspect-ratio: 1 / 1;
  background: var(--washi-deep); margin-bottom: 8px;
}
.card .photo img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
.card:hover .photo img { transform: scale(1.05); }
.card .t { display: block; font-size: 0.92rem; font-weight: 600; letter-spacing: 0.1em; line-height: 1.6; }
.card .y { display: block; font-family: var(--sans); font-size: 0.68rem; letter-spacing: 0.12em; color: var(--sumi-soft); }

/* ---------- piece ---------- */
main.piece { max-width: 760px; margin: 0 auto; padding: clamp(40px, 7vh, 70px) clamp(18px, 4vw, 44px); }
.genre-tag {
  display: inline-block; font-family: var(--sans); font-size: 0.68rem; letter-spacing: 0.24em;
  color: var(--fuji); border: 1px solid currentColor; padding: 2px 14px; margin-bottom: 16px;
}
main.piece h1 { font-size: clamp(1.8rem, 4.5vw, 2.6rem); font-weight: 600; letter-spacing: 0.18em; line-height: 1.5; }
main.piece h1 small {
  display: block; font-family: var(--sans); font-size: 0.78rem; font-weight: 400;
  letter-spacing: 0.3em; color: var(--sumi-soft); margin-top: 6px;
}
.credit { font-size: 0.8rem; color: var(--sumi-soft); margin: 18px 0 0; line-height: 1.9; }
figure.hero { margin: clamp(28px, 5vh, 44px) 0; }
figure.hero img, figure.inline img { width: 100%; }
figure.hero figcaption, figure.inline figcaption {
  text-align: center; font-family: var(--sans); font-size: 0.7rem;
  letter-spacing: 0.2em; color: var(--sumi-soft); margin-top: 10px;
}
.note { font-size: 0.88rem; color: var(--sumi-soft); margin-bottom: 26px; text-align: justify; }
.summary { background: var(--washi-deep); padding: clamp(20px, 3.4vw, 30px); margin-bottom: clamp(36px, 6vh, 56px); }
.summary h2, .shisho h2 {
  font-size: 0.85rem; font-weight: 600; letter-spacing: 0.34em; color: var(--kin); margin-bottom: 12px;
}
.summary p { font-size: 0.9rem; text-align: justify; }
.shisho .block { margin-bottom: 26px; }
.shisho .mark {
  display: inline-block; font-family: var(--sans); font-size: 0.7rem;
  letter-spacing: 0.18em; color: var(--fuji); margin-bottom: 2px;
}
.shisho .text { font-size: 1.02rem; line-height: 2.3; }
.shisho .text ruby rt { font-size: 0.55em; color: var(--sumi-soft); }
.shisho .trans {
  font-size: 0.85rem; color: var(--sumi-soft); margin-top: 4px;
  padding-left: 14px; border-left: 2px solid var(--line); line-height: 2;
}
figure.inline { margin: clamp(30px, 5vh, 46px) 0; }
.notes { margin-top: 34px; font-size: 0.8rem; color: var(--sumi-soft); border-top: 1px solid var(--line); padding-top: 18px; }