/* =========================================================
   色の辞書 — Editorial Minimal（明朝体 × 和紙ベース）
   "Research journal printed on warm stone"
   ========================================================= */

:root {
  --paper: #f4efe3; /* ページ背景：学習用の紙色（温かみのある生成り） */
  --paper-edge: #ece4d2; /* 一段沈んだ紙色（交互セクション） */
  --card: #fbf8f0; /* カード面：一段明るい紙 */
  --ink: #23201a; /* 本文：温黒（純黒を避ける） */
  --ink-2: #6f6757; /* サブテキスト */
  --ink-3: #a79d8a; /* 補助テキスト */
  --line: #e3dbc8; /* 罫線 */
  --line-2: #d3c9b1; /* 強い罫線 */
  --seal: #b14730; /* アクセント：朱（落款の印色。CTA・リンク・選択に限定） */
  --seal-weak: #f1e2d9; /* 朱の淡色背景 */
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius: 4px;
  --shadow-card: 0 1px 2px rgba(60, 48, 28, 0.05);
  --shadow-pop: 0 24px 60px -20px rgba(50, 38, 20, 0.35);
}

* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}

/* 和紙のごく薄い粒状感（紙らしさの演出） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
}
body > * {
  position: relative;
  z-index: 1;
}

a {
  color: var(--seal);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* ===== ヘッダー ===== */
header {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 32px 36px;
  position: relative;
}
.lang-switch {
  position: absolute;
  top: 28px;
  right: 32px;
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.lang-switch:hover {
  color: var(--seal);
  border-color: var(--seal);
}
.brandmark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.brandmark::before {
  content: "";
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--seal);
  box-shadow: inset 0 0 0 2px var(--paper), inset 0 0 0 3px var(--seal);
  flex: none;
}
header h1 {
  margin: 0;
  font-size: clamp(2.3rem, 5.2vw, 3.6rem);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.02em;
}
header h1 .accent {
  color: var(--seal);
}
header .lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 1.12rem;
  color: var(--ink-2);
  line-height: 1.9;
}
.hairline {
  max-width: 1180px;
  margin: 0 auto;
  border: 0;
  border-top: 1px solid var(--line);
}

/* ===== ツールバー（検索・絞り込み） ===== */
.toolbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.toolbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 32px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.search-wrap svg {
  position: absolute;
  left: 4px;
  width: 20px;
  height: 20px;
  color: var(--ink-3);
  pointer-events: none;
}
#search {
  width: 100%;
  font-family: var(--serif);
  font-size: 1.08rem;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1.5px solid var(--line-2);
  padding: 10px 8px 10px 34px;
  outline: none;
  transition: border-color 0.2s;
}
#search::placeholder {
  color: var(--ink-3);
}
#search:focus {
  border-color: var(--seal);
}
.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}
/* カテゴリ：セグメント */
.segmented {
  display: inline-flex;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  overflow: hidden;
}
.segmented button {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--ink-2);
  background: transparent;
  border: 0;
  padding: 7px 16px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}
.segmented button + button {
  border-left: 1px solid var(--line);
}
.segmented button.active {
  background: var(--ink);
  color: var(--paper);
}
/* 色相チップ */
.hue-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.hue-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 5px 13px 5px 11px;
  cursor: pointer;
  transition: all 0.18s;
}
.hue-chip .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12);
  flex: none;
}
.hue-chip:hover {
  border-color: var(--line-2);
}
.hue-chip.active {
  color: var(--ink);
  border-color: var(--ink);
  background: var(--card);
}

/* ===== メイン ===== */
main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
}
.count-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 24px 2px 16px;
  color: var(--ink-2);
}
.count-row .count {
  font-size: 1.05rem;
}
.count-row .count b {
  font-weight: 600;
  color: var(--ink);
}
.count-row .hint {
  font-size: 0.9rem;
  color: var(--ink-3);
}

/* ===== カラーチップグリッド ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 16px;
  padding-bottom: 8px;
}
.chip {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-card);
  cursor: pointer;
  overflow: hidden;
  text-align: left;
  font-family: var(--serif);
  padding: 0;
  transition: transform 0.16s ease, box-shadow 0.16s ease,
    border-color 0.16s ease;
}
.chip:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 26px -14px rgba(50, 38, 20, 0.45);
  border-color: var(--line-2);
}
.chip:focus-visible {
  outline: 2px solid var(--seal);
  outline-offset: 2px;
}
.chip .swatch {
  height: 116px;
  width: 100%;
  position: relative;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}
.chip .swatch .cat-tag {
  position: absolute;
  top: 9px;
  left: 9px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: #4a4133;
  backdrop-filter: blur(2px);
}
.chip .swatch .quick-copy {
  position: absolute;
  top: 7px;
  right: 7px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.82);
  color: #4a4133;
  cursor: pointer;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 0.16s, transform 0.16s, background 0.16s;
}
.chip:hover .quick-copy,
.chip:focus-within .quick-copy {
  opacity: 1;
  transform: translateY(0);
}
.chip .quick-copy:hover {
  background: #fff;
  color: var(--seal);
}
.chip .quick-copy svg {
  width: 15px;
  height: 15px;
}
.chip .meta {
  padding: 12px 13px 14px;
}
.chip .name {
  font-size: 1.12rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.chip .reading {
  font-size: 0.86rem;
  color: var(--ink-3);
  line-height: 1.5;
  margin-top: 1px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chip .hex {
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--ink-2);
  margin-top: 8px;
  text-transform: uppercase;
}

.no-result {
  padding: 64px 16px;
  text-align: center;
  color: var(--ink-2);
  font-size: 1.05rem;
}

/* ===== 詳細モーダル（標本プレート） ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(35, 28, 16, 0.42);
  backdrop-filter: blur(3px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal-overlay.open {
  display: flex;
}
.plate {
  width: min(720px, 100%);
  max-height: 88vh;
  overflow-y: auto;
  background: var(--card);
  border-radius: 8px;
  box-shadow: var(--shadow-pop);
  display: grid;
  grid-template-columns: 1fr 1fr;
  animation: plate-in 0.24s cubic-bezier(0.2, 0.8, 0.3, 1);
}
@keyframes plate-in {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.985);
  }
}
.plate-field {
  position: relative;
  min-height: 320px;
}
.plate-field .close {
  position: absolute;
  top: 14px;
  left: 14px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  color: #2c261c;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.2s;
}
.plate-field .close:hover {
  background: #fff;
}
.plate-field .field-hex {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px 18px;
  font-family: var(--mono);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.plate-body {
  padding: 26px 26px 30px;
}
.plate-cat {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--seal);
}
.plate-name {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 6px 0 2px;
}
.plate-reading {
  color: var(--ink-2);
  font-size: 0.98rem;
}
.plate-en {
  color: var(--ink-3);
  font-size: 0.92rem;
  font-style: italic;
}
.plate-alias {
  margin-top: 6px;
  font-size: 0.9rem;
  color: var(--ink-2);
}
.plate-alias code {
  font-family: var(--mono);
  font-size: 0.86rem;
  background: var(--seal-weak);
  padding: 1px 7px;
  border-radius: 4px;
  color: #7a2a1c;
}
/* コード値（コピー可能な行） */
.values {
  margin: 20px 0 4px;
  border-top: 1px solid var(--line);
}
.value-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  padding: 11px 4px;
  cursor: pointer;
  font-family: var(--serif);
  text-align: left;
  transition: background 0.15s;
}
.value-row:hover {
  background: var(--seal-weak);
}
.value-row .vk {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  width: 42px;
  flex: none;
}
.value-row .vv {
  font-family: var(--mono);
  font-size: 0.98rem;
  color: var(--ink);
  flex: 1;
}
.value-row .copy-ico {
  width: 16px;
  height: 16px;
  color: var(--ink-3);
  flex: none;
}
.value-row:hover .copy-ico {
  color: var(--seal);
}

.plate-section {
  margin-top: 22px;
}
.plate-section h3 {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 8px;
  font-weight: 600;
}
.plate-section .origin {
  font-size: 1.02rem;
  line-height: 1.95;
  padding-left: 14px;
  border-left: 2px solid var(--seal);
}
.plate-section .meaning {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink);
}
/* 配色例 */
.pair-row {
  display: flex;
  gap: 10px;
}
.pair-swatch {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
}
.pair-swatch .pb {
  height: 46px;
}
.pair-swatch .pl {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-align: center;
  padding: 5px 2px;
  color: var(--ink-2);
  text-transform: uppercase;
  background: var(--card);
}
/* コントラスト */
.contrast-row {
  display: flex;
  gap: 10px;
}
.contrast-card {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  text-align: center;
}
.contrast-card .sample {
  font-size: 1.3rem;
  font-weight: 600;
  border-radius: 3px;
  padding: 8px 0;
  margin-bottom: 7px;
  letter-spacing: 0.02em;
}
.contrast-card .ratio {
  font-family: var(--mono);
  font-size: 0.92rem;
  color: var(--ink);
}
.contrast-card .grade {
  font-size: 0.78rem;
  color: var(--ink-3);
  letter-spacing: 0.06em;
}

/* ===== トースト ===== */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 0.96rem;
  padding: 11px 22px;
  border-radius: 999px;
  box-shadow: var(--shadow-pop);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s, transform 0.22s;
  z-index: 80;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== 読み物（SEOコンテンツ） ===== */
.article {
  background: var(--paper-edge);
  border-top: 1px solid var(--line);
  margin-top: 56px;
}
.article-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 32px 72px;
}
.article h2 {
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.4;
  margin: 52px 0 16px;
}
.article h2:first-child {
  margin-top: 0;
}
.article h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 32px 0 10px;
}
.article p {
  font-size: 1.04rem;
  line-height: 2;
  color: #322d24;
  margin: 0 0 16px;
}
.article ul,
.article ol {
  padding-left: 1.4em;
  margin: 0 0 18px;
}
.article li {
  font-size: 1.04rem;
  line-height: 1.95;
  margin-bottom: 8px;
}
.article strong {
  font-weight: 600;
}
.article .lead {
  font-size: 1.15rem;
  line-height: 2;
  padding: 20px 22px;
  background: var(--card);
  border-left: 3px solid var(--seal);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.faq-item {
  border-top: 1px solid var(--line-2);
  padding: 20px 0;
}
.faq-item:last-child {
  border-bottom: 1px solid var(--line-2);
}
.faq-item h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
}
.faq-item p {
  margin: 0;
  color: var(--ink-2);
}
.related {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 8px;
}
.related a {
  display: block;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-decoration: none;
  background: var(--card);
  transition: border-color 0.2s, transform 0.16s;
}
.related a:hover {
  border-color: var(--seal);
  transform: translateY(-2px);
}
.related a strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
}
.related a span {
  display: block;
  color: var(--ink-3);
  font-size: 0.9rem;
  margin-top: 2px;
}

/* ===== 広告（フッター上・サイズ固定でCLS抑制） ===== */
.cd-ad {
  text-align: center;
  background: var(--paper-edge); /* #ece4d2 — 読み物セクションと同色 */
  padding: 28px 16px 32px;
  min-height: 90px;
}
.cd-ad ins {
  display: inline-block;
  width: 728px;
  height: 90px;
}
@media (max-width: 768px) {
  .cd-ad {
    min-height: 50px;
    padding: 20px 16px 24px;
  }
  .cd-ad ins {
    width: 300px;
    height: 50px;
  }
}

/* ===== フッター ===== */
footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 32px;
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: 0.98rem;
  border-top: 1px solid var(--line);
  background: var(--paper);
}
footer a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.2s;
}
footer a:hover {
  color: var(--seal);
}
.footer-links {
  display: flex;
  gap: 14px;
}
.footer-links a {
  border: 1px solid var(--line-2);
  padding: 8px 15px;
  border-radius: 999px;
  font-size: 0.95rem;
  transition: all 0.2s;
}
.footer-links a:hover {
  border-color: var(--seal);
  color: var(--seal);
}

/* ===== レスポンシブ ===== */
@media (max-width: 768px) {
  header {
    padding: 44px 20px 28px;
  }
  .lang-switch {
    top: 22px;
    right: 20px;
  }
  .toolbar-inner {
    padding: 14px 20px;
  }
  main {
    padding: 0 20px;
  }
  .grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
  }
  .plate {
    grid-template-columns: 1fr;
  }
  .plate-field {
    min-height: 200px;
  }
  .article-inner {
    padding: 48px 20px 56px;
  }
  footer {
    flex-direction: column;
    gap: 16px;
    padding: 28px 20px;
    text-align: center;
  }
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}