/* 東京漢学館 — 素箋系浅色設計 v1
   palette: 紙 #F7F3E8 / 墨 #2A251C / 朱 #9E2B25 / 古金 #8A6E23 */

:root {
  --paper: #F7F3E8;
  --paper-deep: #EFE8D6;
  --ink: #2A251C;
  --ink-soft: #57503F;
  --vermilion: #9E2B25;
  --gold: #8A6E23;
  --line: rgba(42, 37, 28, 0.18);
  --serif: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Songti SC", "Noto Serif CJK JP", "Noto Serif SC", serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 2;
  letter-spacing: 0.06em;
  -webkit-font-smoothing: antialiased;
  /* 宣紙の繊維感 */
  background-image:
    radial-gradient(rgba(138, 110, 35, 0.045) 1px, transparent 1px),
    radial-gradient(rgba(42, 37, 28, 0.03) 1px, transparent 1px);
  background-size: 137px 137px, 89px 89px;
  background-position: 0 0, 43px 61px;
}

/* ───── 页头 ───── */
header.kg-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 243, 232, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.kg-header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.kg-brand {
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}
.kg-brand .kg-seal-dot {
  display: inline-block;
  width: 0.5em;
  height: 0.5em;
  background: var(--vermilion);
  border-radius: 1px;
  margin-right: 0.55em;
  vertical-align: 0.12em;
}

nav.kg-nav {
  margin-left: auto;
  display: flex;
  gap: 1.4rem;
  flex-wrap: wrap;
}
nav.kg-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.14em;
  padding: 0.2rem 0;
  border-bottom: 1px solid transparent;
}
nav.kg-nav a:hover { color: var(--vermilion); border-bottom-color: var(--vermilion); }

.kg-lang {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
}
.kg-lang a { color: var(--gold); text-decoration: none; }
.kg-lang a:hover { color: var(--vermilion); }
.kg-lang span.cur { color: var(--ink); }

/* ───── Hero（署名要素:烏絲欄の界格） ───── */
.kg-hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 5.5rem 1.5rem 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
  position: relative;
}
.kg-hero::before {
  content: "";
  position: absolute;
  inset: 0 1.5rem;
  background: repeating-linear-gradient(90deg,
    transparent 0 87px,
    rgba(138, 110, 35, 0.13) 87px 88px);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 22%, #000 78%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 22%, #000 78%, transparent);
  pointer-events: none;
}
.kg-hero > * { position: relative; }

.kg-hero-main { max-width: 620px; }

.kg-hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.4rem);
  font-weight: 600;
  letter-spacing: 0.3em;
  line-height: 1.5;
  margin-bottom: 1.2rem;
}

.kg-hero .kg-hero-sub {
  color: var(--ink-soft);
  font-size: 1.02rem;
  letter-spacing: 0.12em;
  margin-bottom: 2.2rem;
}

.kg-hero .kg-hero-lead {
  border-left: 2px solid var(--vermilion);
  padding-left: 1.2rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
  max-width: 34em;
}

/* 竖排对句 */
.kg-hero-vertical {
  writing-mode: vertical-rl;
  font-size: 1.35rem;
  letter-spacing: 0.42em;
  line-height: 2.6;
  color: var(--ink);
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
  padding: 1.4rem 1.1rem;
  height: 17em;
  flex-shrink: 0;
  position: relative;
  background: #FBF8EF;
}
.kg-hero-vertical .kg-inkseal {
  writing-mode: horizontal-tb;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -1.1rem;
  width: 2.1rem;
  height: 2.1rem;
  background: var(--vermilion);
  color: #F7F3E8;
  font-size: 0.78rem;
  line-height: 1.1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-radius: 2px;
  letter-spacing: 0;
  box-shadow: 0 1px 4px rgba(158, 43, 37, 0.35);
}

/* ───── 通用区块 ───── */
main { display: block; }

section.kg-section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  border-top: 1px solid var(--line);
}

.kg-section-head {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  margin-bottom: 2.4rem;
}
.kg-section-head h2 {
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: 0.28em;
}
.kg-section-head .kg-section-en {
  color: var(--gold);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.kg-prose { max-width: 46em; color: var(--ink-soft); }
.kg-prose p + p { margin-top: 1.2em; }
.kg-prose strong { color: var(--ink); font-weight: 600; }

/* ───── 講座カード ───── */
.kg-courses {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.2rem;
  margin-top: 1rem;
}

.kg-course {
  background: rgba(255, 253, 246, 0.65);
  border: 1px solid var(--line);
  padding: 1.7rem 1.6rem 1.5rem;
  position: relative;
}
.kg-course::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 2.4rem;
  height: 2px;
  background: var(--vermilion);
}
.kg-course h3 {
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  margin-bottom: 0.7rem;
}
.kg-course p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 1.95;
}
.kg-course .kg-course-note {
  margin-top: 0.8rem;
  font-size: 0.8rem;
  color: var(--gold);
  letter-spacing: 0.12em;
}

/* ───── 紅星宣紙 ───── */
.kg-xuan {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}
.kg-xuan-aside {
  border: 1px solid var(--line);
  background: rgba(255, 253, 246, 0.65);
  padding: 1.8rem 1.6rem;
}
.kg-xuan-aside h3 {
  font-size: 1rem;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
  color: var(--ink);
}
.kg-xuan-aside ul { list-style: none; }
.kg-xuan-aside li {
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--line);
}
.kg-xuan-aside li:last-child { border-bottom: none; }
.kg-xuan-aside li::before {
  content: "・";
  color: var(--vermilion);
}

.kg-notice {
  margin-top: 2.2rem;
  border: 1px solid rgba(138, 110, 35, 0.4);
  background: rgba(138, 110, 35, 0.06);
  padding: 1.1rem 1.4rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
  max-width: 46em;
}

/* ───── 講師・会社 ───── */
.kg-master {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2.6rem;
  align-items: start;
}
.kg-master-name {
  writing-mode: vertical-rl;
  font-size: 1.5rem;
  letter-spacing: 0.34em;
  line-height: 2.2;
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  padding: 1.1rem 0.9rem;
  color: var(--ink);
  background: rgba(255, 253, 246, 0.5);
  height: 13em;
}
.kg-master-name small {
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.28em;
}

table.kg-table {
  width: 100%;
  max-width: 46em;
  border-collapse: collapse;
  font-size: 0.94rem;
}
table.kg-table th,
table.kg-table td {
  text-align: left;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.kg-table th {
  width: 9.5em;
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.12em;
  white-space: nowrap;
}
table.kg-table td { color: var(--ink-soft); }

/* ───── ご案内 / 联系 ───── */
.kg-contact-box {
  border: 1px solid var(--line);
  background: rgba(255, 253, 246, 0.65);
  padding: 2.4rem 2.2rem;
  max-width: 46em;
}
.kg-contact-box p { color: var(--ink-soft); }
.kg-contact-lines {
  margin-top: 1.6rem;
  padding-top: 1.4rem;
  border-top: 1px dashed var(--line);
  font-size: 0.98rem;
  line-height: 2.3;
}
.kg-contact-lines a {
  color: var(--vermilion);
  text-decoration: none;
  border-bottom: 1px solid rgba(158, 43, 37, 0.35);
}
.kg-contact-lines a:hover { border-bottom-color: var(--vermilion); }
.kg-contact-lines .kg-label {
  display: inline-block;
  width: 7em;
  color: var(--gold);
  font-size: 0.88rem;
  letter-spacing: 0.14em;
}

/* ───── 页脚 ───── */
footer.kg-footer {
  border-top: 1px solid var(--line);
  margin-top: 2rem;
  background: var(--paper-deep);
}
.kg-footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.6rem 1.5rem 2.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: baseline;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.kg-footer-inner a { color: var(--ink-soft); text-decoration: none; border-bottom: 1px solid var(--line); }
.kg-footer-inner a:hover { color: var(--vermilion); border-bottom-color: var(--vermilion); }
.kg-footer-brand { letter-spacing: 0.2em; color: var(--ink); }

/* ───── Logo ───── */
.kg-brand img.kg-logo {
  height: 52px;
  width: auto;
  display: block;
}

/* ───── 首页専欄カード ───── */
.kg-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.2rem;
  margin-top: 1rem;
}
.kg-column-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: rgba(255, 253, 246, 0.65);
  border: 1px solid var(--line);
  padding: 1.8rem 1.6rem 1.5rem;
  position: relative;
  transition: border-color 0.2s;
}
.kg-column-card:hover { border-color: var(--vermilion); }
.kg-column-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 2.4rem;
  height: 2px;
  background: var(--gold);
}
.kg-column-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  margin-bottom: 0.6rem;
}
.kg-column-card p { font-size: 0.9rem; color: var(--ink-soft); line-height: 1.95; }
.kg-column-card .kg-count {
  margin-top: 0.8rem;
  font-size: 0.8rem;
  color: var(--gold);
  letter-spacing: 0.12em;
}

/* ───── 専欄 hub ───── */
.kg-hub-group { margin-bottom: 3.2rem; }
.kg-hub-group h3 {
  font-size: 1.25rem;
  letter-spacing: 0.24em;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.kg-hub-group .kg-hub-sub {
  font-size: 0.88rem;
  color: var(--gold);
  letter-spacing: 0.1em;
  margin-bottom: 1.2rem;
}
ul.kg-toc { list-style: none; max-width: 46em; }
ul.kg-toc li { border-bottom: 1px dashed var(--line); }
ul.kg-toc li a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.85rem 0.3rem;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.98rem;
  letter-spacing: 0.08em;
}
ul.kg-toc li a:hover { color: var(--vermilion); }
ul.kg-toc li a .kg-toc-note {
  font-size: 0.8rem;
  color: var(--ink-soft);
  white-space: nowrap;
}

/* ───── 閲読页（排版设置移植自弘顕精舎 dharma/kyozo） ───── */
:root {
  --read-body: #4E4636;
  --read-muted: #71695B;
  --line-soft: #E4DECF;
  --read-sans: "Hiragino Sans", "PingFang SC", "Noto Sans CJK JP", sans-serif;
}
.kg-read {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
  font: 400 15px/2 var(--read-sans);
  color: var(--read-body);
  letter-spacing: normal;
}
.kg-read-crumb {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--read-muted);
  margin-bottom: 3.2rem;
}
.kg-read-crumb a { color: var(--read-muted); text-decoration: none; }
.kg-read-crumb a:hover { color: var(--vermilion); }
.kg-eyebrow {
  font-size: 12px;
  letter-spacing: 0.38em;
  color: var(--vermilion);
  margin: 0 0 16px;
}
.kg-read h1 {
  font-family: var(--serif);
  font-size: clamp(25px, 3.8vw, 32px);
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.8;
  color: var(--ink);
  margin: 0 0 10px;
}
.kg-read .kg-read-series {
  font-size: 12.5px;
  color: var(--read-muted);
  letter-spacing: 0.12em;
  margin: 0 0 8px;
  border: none;
  padding: 0;
}
.kg-read h2 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--ink);
  margin: 60px 0 16px;
  padding-top: 28px;
  border-top: 1px solid var(--line-soft);
  line-height: 1.8;
}
.kg-read h3 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--ink);
  margin: 44px 0 14px;
  line-height: 1.8;
}
.kg-read h4 {
  font-family: var(--serif);
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--ink);
  margin: 36px 0 12px;
  line-height: 1.8;
}
.kg-read p { margin: 0 0 1.2em; text-align: left; color: inherit; line-height: 2; }
.kg-read strong { color: var(--ink); }
.kg-read em { font-style: normal; color: var(--ink); border-bottom: 1px solid var(--gold); }
.kg-read ul, .kg-read ol { padding-left: 1.2em; margin: 0 0 1.2em; line-height: 2; }
.kg-read li { margin-bottom: 0.5em; }

/* 原文块:宋体、金线左框、逐段 */
.kg-sutra {
  margin: 30px 0;
  padding: 10px 0 10px 26px;
  border-left: 2px solid var(--gold);
  font-family: var(--serif);
  color: var(--ink);
}
.kg-sutra p {
  margin: 0 0 1.4em;
  font-size: 15.5px;
  line-height: 2.3;
  letter-spacing: 0.04em;
  text-align: left;
}
.kg-sutra p:last-child { margin-bottom: 0; }
.kg-sutra h4 {
  font-size: 17px;
  letter-spacing: 0.24em;
  margin: 2em 0 4px;
}
.kg-sutra h4:first-child { margin-top: 0; }

/* 出处 meta 块 */
.kg-meta {
  margin-top: 72px;
  border-top: 1px solid var(--line-soft);
  padding-top: 24px;
  font-size: 13px;
  color: var(--read-muted);
  line-height: 2.1;
}
.kg-meta a { color: var(--read-muted); border-bottom: 1px solid var(--line-soft); text-decoration: none; }
.kg-meta a:hover { color: var(--vermilion); border-bottom-color: var(--vermilion); }
.kg-read details.kg-provenance {
  margin-top: 14px;
  border: none;
  background: none;
  padding: 0;
  font-size: 13px;
  color: var(--read-muted);
}
.kg-read details.kg-provenance summary {
  cursor: pointer;
  letter-spacing: 0.14em;
  color: var(--gold);
}
.kg-read details.kg-provenance p { line-height: 2; margin: 1em 0 0; font-size: 13px; }
.kg-read details.kg-provenance h3 {
  font-family: var(--read-sans);
  font-size: 13px;
  color: var(--read-muted);
  letter-spacing: 0.14em;
  margin: 1.6em 0 0.4em;
}
.kg-read-nav {
  margin-top: 28px;
  padding-top: 0;
  border-top: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 14px;
}
.kg-read-nav a { color: var(--vermilion); text-decoration: none; }
.kg-read-nav a:hover { border-bottom: 1px solid var(--vermilion); }
.kg-langlink { font-size: 12px; margin-left: 1rem; letter-spacing: 0.1em; }

/* ───── 門扉(入口)コンポーネント ───── */
a.kg-door {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  border: 1px solid var(--line);
  background: rgba(255, 253, 246, 0.7);
  padding: 0.95rem 1.5rem;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  transition: border-color 0.2s, box-shadow 0.2s;
}
a.kg-door::before {
  content: "";
  width: 0.5em;
  height: 0.5em;
  background: var(--vermilion);
  border-radius: 1px;
  flex-shrink: 0;
}
a.kg-door::after {
  content: "→";
  color: var(--vermilion);
  transition: transform 0.2s;
}
a.kg-door:hover { border-color: var(--vermilion); box-shadow: 0 1px 6px rgba(42, 37, 28, 0.08); }
a.kg-door:hover::after { transform: translateX(4px); }
@media (prefers-reduced-motion: reduce) {
  a.kg-door::after, a.kg-door { transition: none; }
}

/* ───── 講師紹介 v2 ───── */
.kg-master2 {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}
.kg-master2 .kg-master-fig img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  filter: grayscale(1);
}
.kg-master2 .kg-master-fig figcaption {
  font-size: 0.8rem;
  color: var(--ink-soft);
  letter-spacing: 0.12em;
  padding-top: 0.5rem;
  text-align: center;
}
.kg-master-head {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1.1rem;
  margin-bottom: 1.5rem;
}
.kg-master-head .kg-master-h3 {
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--ink);
  line-height: 1.4;
}
.kg-master-head .kg-master-azana {
  color: var(--gold);
  font-size: 0.88rem;
  letter-spacing: 0.22em;
  margin-top: 0.5rem;
}

/* ───── フォーカス可視 ───── */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 2px;
}

/* ───── 図版 ───── */
figure.kg-figure { margin: 0; }
figure.kg-figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  background: #fff;
}
figure.kg-figure figcaption {
  font-size: 0.8rem;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
  padding-top: 0.5rem;
  text-align: center;
}
.kg-imgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin-top: 2rem;
}
.kg-imgrid figure.kg-figure img { aspect-ratio: 1 / 1; object-fit: cover; }
.kg-craft { margin-top: 2rem; }
.kg-craft img { width: 100%; max-width: 720px; display: block; border: 1px solid var(--line); }

.kg-master-photo {
  width: 190px;
  max-width: 40vw;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  filter: grayscale(1);
}
.kg-master-figs { display: flex; flex-direction: column; gap: 1rem; align-items: center; }

.kg-hero-photo {
  margin: 0 auto;
  max-width: 1080px;
  padding: 0 1.5rem;
}
.kg-hero-photo img {
  width: 100%;
  display: block;
  border: 1px solid var(--line);
}

/* ───── 响应式 ───── */
@media (max-width: 820px) {
  .kg-hero { flex-direction: column-reverse; align-items: flex-start; padding-top: 3.5rem; }
  .kg-hero-vertical { height: 13em; font-size: 1.1rem; align-self: flex-end; }
  .kg-xuan { grid-template-columns: 1fr; gap: 1.8rem; }
  .kg-master { grid-template-columns: 1fr; }
  .kg-master-name {
    writing-mode: horizontal-tb;
    height: auto;
    border: none;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 0.8rem 0.2rem;
    font-size: 1.25rem;
  }
  nav.kg-nav { display: none; }
  table.kg-table th { width: 7em; }
  .kg-brand img.kg-logo { height: 40px; }
  .kg-master2 { grid-template-columns: 1fr; }
  .kg-master2 .kg-master-fig { max-width: 280px; }
  .kg-hero::before { display: none; }
}