/* HOME-only color atlas. Shared dictionary and saved-data surfaces retain their own presentation. */
.home-page {
  --home-ink: #1A2340;
  --home-accent: #00A7B5;
  --home-accent-text: #007781;
  --home-magenta-text: #B31368;
  --home-rule: #AAB3C3;
  --home-gutter: clamp(24px, 3.35vw, 56px);
  background: #FFFFFF;
  color: var(--home-ink);
  font-family: "Meiryo", "Yu Gothic", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.home-page a { color: inherit; }
.home-page a:focus-visible, .home-page summary:focus-visible {
  outline: 3px solid var(--home-ink);
  outline-offset: 6px;
  border-radius: 0;
}
.home-page .skip-link { z-index: 20; }
.home-page .site-header { border-bottom: 1px solid var(--home-ink); }
.home-page .header-inner {
  max-width: 1552px;
  min-height: 90px;
  padding: 16px var(--home-gutter);
  flex-wrap: nowrap;
  gap: 24px;
}
.home-page .brand { font-size: clamp(23px, 2.2vw, 34px); font-weight: 800; letter-spacing: -.055em; }
.home-page .brand span { color: var(--home-accent-text); margin-left: 0; }
.home-page nav { gap: clamp(16px, 2.7vw, 42px); }
.home-page nav[aria-label="色辞典"] { margin-left: auto; }
.home-page nav a { font-size: 15px; font-weight: 700; }
.home-page nav a:hover { text-decoration: underline; text-decoration-thickness: 2px; }
.home-page main { max-width: none; padding: 0; }
.home-page main > section + section { margin-top: 0; }
.home-hero, .home-dictionaries, .home-notes, .home-workflow-inner {
  max-width: 1552px;
  margin-inline: auto;
  padding-inline: var(--home-gutter);
}
.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 24px;
  padding-top: 72px;
  padding-bottom: 72px;
  align-items: center;
}
.home-hero-copy { min-width: 0; padding-block: 6px; position: relative; z-index: 4; }
.home-intro-note { margin-bottom: 17px; font-size: 13px; letter-spacing: .055em; font-weight: 700; }
.home-hero h1 {
  font-size: clamp(48px, 6.4vw, 98px);
  font-weight: 900;
  line-height: 1.32;
  letter-spacing: -.075em;
  margin-bottom: 30px;
}
.home-hero h1 span { display: block; }
.home-hero .lead { max-width: 42em; font-size: clamp(16px, 1.42vw, 21px); line-height: 1.95; margin-bottom: 30px; }
.home-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px 30px; }
.home-page .primary-link {
  min-height: 68px;
  border-radius: 0;
  background: var(--home-ink);
  color: #FFFFFF;
  padding: 16px 27px;
  gap: 26px;
  font-size: clamp(17px, 1.55vw, 23px);
  font-weight: 700;
}
.home-page .primary-link:focus-visible { outline-offset: 5px; }
.home-secondary-link {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: clamp(16px, 1.45vw, 21px);
  font-weight: 700;
  text-decoration: none;
}
.home-link-label { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 7px; }
.home-hero .catalog-count { max-width: 42em; margin: 22px 0 0; font-size: 13px; line-height: 1.85; font-weight: 500; }
.home-swatch-books { position: relative; min-width: 0; height: 490px; }
.home-book {
  display: block;
  position: absolute;
  width: 31%;
  background: #FFFFFF;
  border: 1px solid #D5DCE5;
  color: var(--home-ink);
  text-decoration: none;
}
.home-book:nth-child(1) { left: 0; top: 20px; transform: rotate(3deg); z-index: 2; }
.home-book:nth-child(2) { left: 34%; top: 155px; transform: rotate(-3deg); z-index: 3; }
.home-book:nth-child(3) { left: 68%; top: 60px; transform: rotate(-3deg); z-index: 1; }
.home-book:focus-visible { z-index: 10; }
.home-book .home-swatch-surface { display: block; aspect-ratio: 1 / 1.1; }
.home-book .home-swatch-caption { display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 6px; padding: 14px 13px 16px; min-height: 124px; }
.home-swatch-system { font-size: 11px; }
.home-book .home-swatch-system, .home-book .home-swatch-name { grid-column: 1 / -1; }
.home-book .home-swatch-name { font-size: clamp(18px, 1.5vw, 24px); font-weight: 800; letter-spacing: -.04em; line-height: 1.4; }
.home-book code { grid-column: 1; font-size: clamp(12px, 1.05vw, 16px); }
.home-swatch-arrow { grid-column: 2; grid-row: 3; align-self: center; font-size: 22px; line-height: 1; }
.home-dictionaries { padding-bottom: 90px; }
.home-section-heading { display: flex; align-items: center; gap: 35px; border-top: 1px solid var(--home-ink); padding-top: 40px; margin-bottom: 35px; }
.home-section-heading h2 { font-size: clamp(34px, 4.7vw, 70px); line-height: 1.3; letter-spacing: -.065em; font-weight: 900; margin: 0; }
.home-section-heading > p { border-left: 1px solid var(--home-rule); padding: 12px 0 12px 35px; margin: 0; font-size: clamp(16px, 1.8vw, 26px); }
.home-dictionary-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.home-dictionary { min-width: 0; padding: 30px 34px 30px 0; border-bottom: 1px solid var(--home-rule); }
.home-dictionary:nth-child(even) { padding-inline: 34px 0; border-left: 1px solid var(--home-rule); }
.home-dictionary:nth-last-child(-n+2) { border-bottom: 0; }
.home-dictionary-heading { margin-bottom: 22px; }
.home-dictionary-heading h3 { flex: 1; margin: 0; font-size: clamp(28px, 3.15vw, 48px); font-weight: 850; line-height: 1.4; letter-spacing: -.06em; }
.home-dictionary-heading h3 a { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 18px; min-height: 56px; text-decoration: none; }
.home-dictionary-arrow { margin-left: auto; font-weight: 400; font-size: .85em; }
.home-dictionary-heading h3 a:hover { text-decoration: underline; text-decoration-thickness: 2px; }
.home-dictionary-count { color: var(--home-accent-text); font-size: clamp(17px, 2vw, 29px); font-weight: 700; letter-spacing: -.02em; }
.home-specimens { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 22px; }
.home-specimen { min-width: 0; display: block; text-decoration: none; }
.home-specimen .home-swatch-surface { display: block; height: clamp(80px, 8.6vw, 134px); }
.home-specimen .home-swatch-caption { display: flex; flex-wrap: wrap; column-gap: 9px; margin-top: 7px; font-size: 12px; line-height: 1.7; }
.home-specimen .home-swatch-name { font-weight: 500; }
.home-specimen code { font-size: 12px; }
.home-specimen:hover .home-swatch-name { text-decoration: underline; }
.home-dictionary-description { font-size: clamp(14px, 1.25vw, 18px); line-height: 1.9; margin: 0; }
.home-websafe-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; height: clamp(80px, 8.6vw, 134px); margin-bottom: 49px; }
.home-websafe-group { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); grid-template-rows: repeat(6, minmax(0, 1fr)); gap: 0; }
.home-websafe-swatch { display: block; }
.home-workflow { background: var(--home-ink); color: #FFFFFF; }
.home-workflow-inner { padding-top: 68px; padding-bottom: 42px; }
.home-workflow h2 { font-size: clamp(44px, 6.4vw, 96px); font-weight: 900; line-height: 1.3; letter-spacing: -.06em; margin-bottom: 42px; }
.home-workflow h2 span { display: block; }
.home-workflow-palette { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); height: 62px; margin-bottom: 34px; }
.home-workflow-palette span:nth-child(1) { background: #00A7B5; }
.home-workflow-palette span:nth-child(2) { background: #C8F0F3; }
.home-workflow-palette span:nth-child(3) { background: #334471; }
.home-workflow-palette span:nth-child(4) { background: #E91E8C; }
.home-workflow-palette span:nth-child(5) { background: #F6B7CE; }
.home-workflow ol { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); list-style: none; margin: 0 0 26px; padding: 0; }
.home-workflow li { min-width: 0; border-left: 1px solid #9DA6BA; padding-inline: 24px; }
.home-workflow li:first-child { border-left: 0; padding-left: 0; }
.home-workflow li:last-child { padding-right: 0; }
.home-step-number { display: block; font-size: clamp(36px, 3.4vw, 52px); font-weight: 800; line-height: 1.3; letter-spacing: -.07em; }
.home-workflow li a { display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid #9DA6BA; padding-bottom: 12px; min-height: 54px; font-size: clamp(16px, 1.6vw, 24px); font-weight: 700; text-decoration: none; }
.home-workflow li a span { font-size: 1.25em; font-weight: 400; }
.home-workflow li a:hover { text-decoration: underline; }
.home-workflow li p { margin: 16px 0 0; font-size: clamp(14px, 1.25vw, 18px); line-height: 1.85; }
.home-workflow a:focus-visible { outline-color: #FFFFFF; }
.home-workflow .small { margin: 0; font-size: 12px; line-height: 1.9; }
.home-notes { padding-top: 60px; padding-bottom: 36px; }
.home-notes-intro { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1fr); gap: 52px; align-items: center; margin-bottom: 30px; }
.home-notes h2 { font-size: clamp(32px, 3.7vw, 56px); font-weight: 850; line-height: 1.4; letter-spacing: -.06em; margin: 0; }
.home-notes h2 span { display: block; }
.home-notes-intro > div { border-left: 1px solid var(--home-rule); padding-left: 52px; font-size: clamp(15px, 1.5vw, 22px); }
.home-notes-intro p { margin-bottom: 15px; line-height: 1.8; }
.home-notes-intro a { display: inline-flex; align-items: center; gap: 18px; min-height: 48px; color: var(--home-magenta-text); font-weight: 700; text-decoration: none; }
.home-notes details { border-block: 1px solid var(--home-ink); }
.home-notes summary { cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 62px; padding: 10px 12px; list-style: none; font-size: 15px; }
.home-notes summary::-webkit-details-marker { display: none; }
.home-notes summary::after { content: "+"; font-size: 28px; font-weight: 400; line-height: 1; }
.home-notes details[open] summary::after { content: "−"; }
.home-notes details p { max-width: 76em; margin: 0 12px 18px; font-size: 14px; }
.home-page footer { max-width: 1440px; margin-inline: var(--home-gutter); padding: 25px 0 32px; border-top: 1px solid var(--home-ink); display: grid; grid-template-columns: auto auto minmax(0, 1fr); align-items: start; column-gap: 30px; }
.home-page footer > p:first-child { font-size: 21px; letter-spacing: -.05em; margin: 2px 0 0; }
.home-page .footer-links { gap: 10px 24px; margin-bottom: 0; }
.home-page .footer-links a { font-size: 12px; min-height: 40px; }
.home-page footer > .small { max-width: 33em; justify-self: end; font-size: 12px; margin: 4px 0 0; }
@media (min-width: 1552px) { .home-page footer { margin-inline: auto; max-width: 1440px; } }
@media (max-width: 1100px) and (min-width: 901px) {
  .home-page .header-inner { gap: 18px; }
  .home-page nav { gap: 20px; }
  .home-page nav a { font-size: 13px; }
  .home-hero { padding-top: 54px; padding-bottom: 45px; }
  .home-swatch-books { height: 425px; }
  .home-book:nth-child(2) { top: 135px; }
  .home-book .home-swatch-caption { min-height: 120px; padding: 12px 10px 16px; }
  .home-actions { gap: 14px 20px; }
  .home-page .primary-link { padding-inline: 20px; gap: 18px; }
  .home-dictionary { padding-right: 25px; }
  .home-dictionary:nth-child(even) { padding-left: 25px; }
  .home-workflow li { padding-inline: 18px; }
  .home-page footer { grid-template-columns: auto 1fr; }
  .home-page footer > .small { grid-column: 1 / -1; max-width: none; justify-self: start; margin-top: 14px; }
}
@media (max-width: 900px) {
  .home-page .header-inner { flex-wrap: wrap; gap: 6px 20px; padding-block: 15px; }
  .home-page .brand { width: 100%; font-size: 28px; }
  .home-page nav[aria-label="色辞典"] { margin: 0; flex: 1; }
  .home-page nav { gap: 12px 26px; }
  .home-page nav a { font-size: 13px; }
  .home-hero { grid-template-columns: minmax(0, 1fr); gap: 10px; padding-top: 46px; padding-bottom: 42px; }
  .home-hero h1 { font-size: clamp(44px, 10.1vw, 82px); line-height: 1.3; max-width: none; margin-bottom: 24px; }
  .home-hero .lead { max-width: 38em; font-size: 17px; margin-bottom: 24px; }
  .home-page .primary-link { font-size: 19px; }
  .home-secondary-link { font-size: 18px; }
  .home-hero .catalog-count { max-width: none; }
  .home-swatch-books { width: 75%; justify-self: center; height: 490px; margin-top: 24px; }
  .home-book:nth-child(2) { top: 155px; }
  .home-book .home-swatch-name { font-size: 26px; }
  .home-book code { font-size: 15px; }
  .home-section-heading { gap: 24px; padding-top: 32px; }
  .home-section-heading > p { padding-left: 24px; font-size: 17px; }
  .home-section-heading h2 { font-size: 40px; }
  .home-dictionary { padding: 22px 22px 28px 0; }
  .home-dictionary:nth-child(even) { padding-inline: 22px 0; }
  .home-dictionary-heading { margin-bottom: 16px; }
  .home-dictionary-heading h3 { font-size: 28px; }
  .home-dictionary-heading h3 a { gap: 8px 12px; }
  .home-dictionary-heading h3 a { min-height: 48px; }
  .home-dictionary-count { font-size: 18px; }
  .home-specimen .home-swatch-surface, .home-websafe-grid { height: 90px; }
  .home-websafe-grid { margin-bottom: 70px; gap: 5px; }
  .home-specimen .home-swatch-caption { font-size: 11px; }
  .home-specimen code { font-size: 12px; }
  .home-dictionary-description { font-size: 14px; }
  .home-dictionaries { padding-bottom: 55px; }
  .home-workflow-inner { padding-top: 48px; padding-bottom: 35px; }
  .home-workflow h2 { font-size: 66px; margin-bottom: 30px; }
  .home-workflow ol { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 0; }
  .home-workflow li { padding-inline: 24px; }
  .home-workflow li:nth-child(odd) { border-left: 0; padding-left: 0; }
  .home-workflow li:nth-child(even) { padding-right: 0; }
  .home-workflow li a { font-size: 20px; }
  .home-workflow li p { font-size: 15px; }
  .home-notes-intro { gap: 28px; }
  .home-notes-intro > div { padding-left: 28px; font-size: 15px; }
  .home-notes h2 { font-size: 39px; }
  .home-page footer { grid-template-columns: auto 1fr; column-gap: 30px; }
  .home-page footer > .small { grid-column: 1 / -1; max-width: none; justify-self: start; margin-top: 14px; }
}
@media (max-width: 600px) {
  .home-page { --home-gutter: 24px; }
  .home-page .header-inner { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); padding-block: 10px 7px; gap: 3px 10px; }
  .home-page .brand { width: auto; font-size: clamp(19px, 5.4vw, 22px); grid-column: 1; grid-row: 1; }
  .home-page nav { min-width: 0; max-width: 100%; gap: 3px 10px; }
  .home-page nav[aria-label="色辞典"] { width: 100%; grid-column: 1 / -1; grid-row: 2; justify-content: space-between; }
  .home-page nav[aria-label="制作ツール"] { width: auto; grid-column: 2; grid-row: 1; justify-self: end; }
  .home-page nav a { font-size: 12px; min-height: 44px; }
  .home-page nav[aria-label="制作ツール"] a { min-height: 44px; }
  .home-hero { padding-top: 32px; padding-bottom: 34px; gap: 0; }
  .home-intro-note { font-size: 11px; letter-spacing: .02em; margin-bottom: 14px; }
  .home-hero h1 { font-size: clamp(36px, 11.4vw, 64px); letter-spacing: -.075em; line-height: 1.32; margin-bottom: 20px; }
  .home-hero .lead { font-size: 14px; line-height: 1.95; margin-bottom: 24px; }
  .home-actions { gap: 13px; align-items: flex-start; flex-direction: column; }
  .home-page .primary-link { min-height: 60px; width: 100%; justify-content: space-between; padding: 14px 20px; font-size: 18px; }
  .home-secondary-link { font-size: 15px; min-height: 44px; }
  .home-hero .catalog-count { margin-top: 16px; font-size: 11px; }
  .home-swatch-books { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; gap: 8px; width: 100%; height: auto; min-height: 280px; margin-top: 30px; padding-block: 5px 10px; }
  .home-book { position: relative; width: 100%; min-width: 0; }
  .home-book:nth-child(1) { left: auto; top: auto; transform: rotate(-1deg); }
  .home-book:nth-child(2) { left: auto; top: auto; transform: rotate(1deg); margin-top: 44px; }
  .home-book:nth-child(3) { left: auto; top: auto; transform: rotate(-1deg); margin-top: 13px; }
  .home-book .home-swatch-surface { aspect-ratio: 1 / 1.35; }
  .home-book .home-swatch-caption { display: flex; flex-direction: column; gap: 3px; padding: 10px 7px; min-height: 110px; }
  .home-swatch-system { font-size: 11px; }
  .home-book .home-swatch-name { font-size: 14px; letter-spacing: -.035em; overflow-wrap: anywhere; }
  .home-book code { font-size: 12px; letter-spacing: -.045em; }
  .home-swatch-arrow { align-self: flex-end; font-size: 20px; }
  .home-section-heading { display: block; padding-top: 28px; margin-bottom: 10px; }
  .home-section-heading h2 { font-size: clamp(29px, 8.5vw, 45px); line-height: 1.4; }
  .home-section-heading > p { border: 0; padding: 0; margin-top: 10px; font-size: 12px; }
  .home-dictionary-grid { grid-template-columns: minmax(0, 1fr); }
  .home-dictionary, .home-dictionary:nth-child(even) { padding: 28px 0; border-left: 0; border-bottom: 1px solid var(--home-rule); }
  .home-dictionary:last-child { border-bottom: 0; padding-bottom: 0; }
  .home-dictionary-heading { margin-bottom: 16px; }
  .home-dictionary-heading h3 { font-size: clamp(25px, 7vw, 36px); }
  .home-dictionary-heading h3 a { gap: 8px 12px; }
  .home-dictionary-count { font-size: 18px; }
  .home-specimens { gap: 8px; margin-bottom: 17px; }
  .home-specimen .home-swatch-surface { height: 84px; }
  .home-specimen .home-swatch-caption { display: grid; font-size: 11px; line-height: 1.8; }
  .home-specimen code { font-size: 12px; }
  .home-websafe-grid { height: 105px; margin-bottom: 18px; gap: 5px; }
  .home-dictionary-description { font-size: 14px; line-height: 1.9; }
  .home-dictionaries { padding-bottom: 40px; }
  .home-workflow-inner { padding-top: 36px; padding-bottom: 30px; }
  .home-workflow h2 { font-size: clamp(38px, 10.7vw, 60px); line-height: 1.35; margin-bottom: 26px; }
  .home-workflow-palette { height: 32px; margin-bottom: 26px; }
  .home-workflow ol { grid-template-columns: minmax(0, 1fr); gap: 0; margin-bottom: 24px; }
  .home-workflow li, .home-workflow li:nth-child(even), .home-workflow li:nth-child(odd) { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 7px 15px; border-left: 0; border-bottom: 1px solid #9DA6BA; padding: 17px 0 19px; }
  .home-workflow li:first-child { padding-top: 0; }
  .home-step-number { font-size: 29px; }
  .home-workflow li a { font-size: 20px; padding-bottom: 0; border: 0; min-height: 47px; }
  .home-workflow li p { grid-column: 1 / -1; margin-top: 0; font-size: 14px; }
  .home-workflow .small { font-size: 12px; }
  .home-notes { padding-top: 34px; padding-bottom: 26px; }
  .home-notes-intro { display: block; margin-bottom: 25px; }
  .home-notes h2 { font-size: clamp(31px, 8.6vw, 44px); line-height: 1.35; margin-bottom: 24px; }
  .home-notes-intro > div { border-left: 0; padding: 0; font-size: 14px; }
  .home-notes-intro p { line-height: 1.9; }
  .home-notes-intro a { font-size: 15px; }
  .home-notes summary { font-size: 12px; padding-inline: 0; min-height: 60px; }
  .home-notes details p { margin-inline: 0; font-size: 12px; }
  .home-page footer { display: block; padding-top: 21px; padding-bottom: 25px; }
  .home-page footer > p:first-child { font-size: 21px; margin-bottom: 12px; }
  .home-page .footer-links { gap: 0 22px; }
  .home-page .footer-links a { font-size: 12px; min-height: 44px; }
  .home-page footer > .small { font-size: 12px; margin-top: 12px; }
}
@media (prefers-reduced-motion: no-preference) {
  .home-page a > span[aria-hidden="true"], .home-swatch-arrow { transition: translate 160ms ease; }
  .home-page a:hover > span[aria-hidden="true"]:not(.home-swatch-surface), .home-book:hover .home-swatch-arrow { translate: 3px 0; }
}