:root {
  color-scheme: light;
  --paper: #f7f7ef;
  --white: #fffef8;
  --ink: #213c32;
  --green: #173f35;
  --muted: #59665b;
  --line: #d8ddcc;
  --lime: #dbe7ac;
  --font: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--font); font-size: 15px; line-height: 1.9; -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, p, figure { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
button, summary { touch-action: manipulation; }
img { display: block; max-width: 100%; height: auto; }
::selection { color: var(--green); background: var(--lime); }
:focus-visible { outline: 3px solid #7e6820; outline-offset: 6px; }
[id] { scroll-margin-top: 10px; }
[hidden] { display: none !important; }
.container { width: min(1160px, calc(100% - 96px)); margin-inline: auto; }
.icon-definitions { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 40px; height: 40px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.arrow-icon { width: 23px; height: 23px; }
.skip-link { position: fixed; z-index: 20; top: 12px; left: 16px; padding: 10px 20px; background: var(--white); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.eyebrow { display: flex; align-items: center; gap: 10px; color: #4f6653; font-size: 11px; font-weight: 700; letter-spacing: .16em; line-height: 1.5; }
.mobile-break { display: none; }
.section-space { padding-block: 92px; }
h2 { font-size: clamp(25px, 2.6vw, 34px); font-weight: 750; letter-spacing: .025em; line-height: 1.6; }

/* Header */
.site-header { position: sticky; z-index: 10; top: 0; border-bottom: 1px solid var(--line); background: var(--paper); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 90px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark { display: grid; place-items: center; width: 48px; height: 48px; color: var(--lime); background: var(--green); border-radius: 50%; }
.brand-mark .icon { width: 32px; height: 32px; }
.brand-name { font-size: 23px; font-weight: 800; letter-spacing: .02em; line-height: 1.25; }
.brand-amp { padding-inline: 2px; font-size: 18px; }
.brand-subtitle { display: block; margin-top: 5px; font-size: 10px; font-weight: 500; letter-spacing: .19em; }
.site-nav { display: flex; align-items: center; gap: 28px; font-size: 12px; font-weight: 650; }
.site-nav a { display: flex; align-items: center; min-height: 44px; transition: color .18s; }
.site-nav a:hover { color: #6c7132; }
.site-nav .nav-about { gap: 15px; padding-left: 25px; border-left: 1px solid var(--line); font-size: 11px; }
.menu-toggle { display: none; }

/* First view */
.hero { border-bottom: 1px solid var(--line); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 44px; padding-block: 58px 45px; }
.hero-copy { padding-block: 20px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #799554; box-shadow: 0 0 0 4px #79955416; }
h1 { margin-top: 26px; font-size: clamp(37px, 4.35vw, 60px); font-weight: 800; line-height: 1.55; letter-spacing: .025em; }
h1 span { color: #50713c; }
.hero-description { margin-top: 23px; color: var(--muted); font-size: 14px; line-height: 2.05; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 38px; min-height: 58px; padding: 15px 23px; border: 1px solid var(--green); border-radius: 4px; font-size: 13px; font-weight: 650; transition: background .18s, transform .18s; }
.button-primary { margin-top: 31px; color: var(--white); background: var(--green); }
.button-primary:hover { background: #2d5947; transform: translateY(-2px); }
.hero-note { margin-top: 13px; color: var(--muted); font-size: 10px; letter-spacing: .025em; }
.hero-visual { position: relative; align-self: stretch; display: flex; flex-direction: column; justify-content: center; padding: 19px 25px 22px; background: #e8edda; border: 1px solid #dce2cb; border-radius: 45% 45% 5px 5px; }
.visual-topline { position: absolute; z-index: 1; inset: 26px 26px auto; display: flex; align-items: center; justify-content: space-between; font-size: 9px; font-weight: 650; letter-spacing: .12em; color: #536548; }
.visual-topline span:first-child { background: var(--paper); border: 1px solid #d5ddc5; border-radius: 20px; padding: 5px 12px; }
.visual-topline span:last-child { font-size: 22px; }
.hero-beetle { width: 100%; margin-block: 9px -12px; }
.visual-caption { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-top: auto; padding-top: 12px; border-top: 1px solid #cad3b8; font-size: 12px; line-height: 1.8; }
.visual-caption strong { font-weight: 650; }
.illustration-label { font-size: 8px; font-weight: 600; letter-spacing: .15em; text-align: right; }
.hero-bottom { display: flex; align-items: center; justify-content: space-between; padding-bottom: 20px; color: var(--muted); font-size: 10px; letter-spacing: .08em; }
.hero-bottom a { display: inline-flex; align-items: center; gap: 20px; min-height: 44px; font-size: 9px; font-weight: 700; letter-spacing: .16em; }
.hero-bottom a span { font-size: 19px; }

/* Content directory */
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 36px; margin-bottom: 34px; }
.section-heading h2, .guide-intro h2, .updates-section h2 { margin-top: 13px; }
.section-description { padding-bottom: 5px; color: var(--muted); font-size: 12px; }
.content-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.content-card { display: flex; flex-direction: column; min-width: 0; padding: 22px 25px 23px; border: 1px solid var(--line); border-radius: 5px; background: var(--white); }
.card-topline { display: flex; justify-content: space-between; align-items: center; }
.card-number { color: #75816c; font-family: Georgia, serif; font-size: 20px; font-style: italic; }
.status-tag { padding: 2px 10px; border: 1px solid #d4dcc8; border-radius: 20px; color: #526548; font-size: 10px; }
.card-illustration { position: relative; display: grid; place-items: center; height: 139px; margin-block: 10px 17px; overflow: hidden; }
.card-illustration::before { position: absolute; width: 112px; height: 112px; border-radius: 50%; background: #eef0df; content: ""; }
.card-illustration .icon { position: relative; z-index: 1; width: 65px; height: 65px; stroke-width: 1.2; }
.illustration-insect .icon { transform: rotate(-20deg); }
.illustration-party::before { background: #e7ece2; }
.illustration-party .icon { width: 70px; height: 70px; }
.illustration-guide::before { background: #f0ecd8; }
.illustration-guide .icon { transform: rotate(-8deg); }
.orbit { position: absolute; border: 1px solid #b4c09c; border-radius: 50%; }
.orbit-one { width: 145px; height: 115px; transform: rotate(-35deg); }
.orbit-two { top: 28px; right: calc(50% - 80px); width: 6px; height: 6px; background: #b4c09c; }
.card-eyebrow { color: #5b6e54; font-size: 9px; font-weight: 650; letter-spacing: .13em; }
.content-card h3 { margin-top: 6px; font-size: 23px; letter-spacing: .04em; line-height: 1.6; }
.card-description { flex-grow: 1; margin-top: 12px; margin-bottom: 23px; color: var(--muted); font-size: 12px; line-height: 1.95; }
.card-footer, .card-link { border-top: 1px solid var(--line); padding-top: 16px; }
.card-footer > span { display: block; color: #5d6d52; font-size: 9px; }
.card-footer p { margin-top: 3px; font-size: 10px; }
.card-link { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 61px; font-size: 12px; font-weight: 650; }
.card-link:hover { color: #657a32; }
.card-link .arrow-icon { width: 21px; height: 21px; }
.content-note { margin-top: 20px; color: var(--muted); font-size: 11px; }

/* Field notes */
.guide-section { background: #e9eddf; border-block: 1px solid #dce1d1; }
.guide-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; }
.guide-intro > p:not(.eyebrow) { max-width: 350px; margin-top: 22px; color: #53614f; font-size: 13px; }
.guide-stamp { display: inline-flex; align-items: center; gap: 10px; margin-top: 28px; color: #4f634a; font-size: 11px; }
.guide-stamp .icon { width: 24px; height: 24px; }
.guide-notes { align-self: center; border-top: 1px solid #bdc8b1; }
.note { border-bottom: 1px solid #bdc8b1; }
.note summary { display: flex; align-items: center; gap: 17px; min-height: 81px; padding: 18px 0; cursor: pointer; list-style: none; font-size: 14px; font-weight: 650; }
.note summary::-webkit-details-marker { display: none; }
.note summary:hover { color: #627b41; }
.note-number { color: #607655; font-family: Georgia, serif; font-size: 18px; font-style: italic; font-weight: 400; }
.note-toggle { position: relative; flex-shrink: 0; width: 20px; height: 20px; margin-left: auto; }
.note-toggle::before, .note-toggle::after { position: absolute; top: 9px; left: 3px; width: 14px; height: 1px; background: currentColor; content: ""; }
.note-toggle::after { transform: rotate(90deg); }
.note[open] .note-toggle::after { transform: rotate(0); }
.note-body { padding: 0 22px 24px 38px; color: #4e5e4a; font-size: 12px; line-height: 2; }
.memo-example { margin-top: 15px; padding: 10px 13px; background: #f4f5eb; border-left: 2px solid #a4b28a; font-size: 11px; }

/* News and site information */
.updates-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; }
.updates-description { margin-top: 12px; color: var(--muted); font-size: 12px; }
.update-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.update-list li { padding: 25px 0; border-bottom: 1px solid var(--line); }
.update-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; color: #54634e; font-size: 11px; }
.update-meta time { font-variant-numeric: tabular-nums; letter-spacing: .08em; }
.update-category { padding: 2px 10px; background: #e9ecdd; border-radius: 2px; font-size: 10px; }
.update-list h3 { margin-top: 12px; font-size: 15px; font-weight: 650; }
.update-list p { margin-top: 7px; color: var(--muted); font-size: 12px; }
.about-section { padding-block: 56px; color: #f1f2df; background: var(--green); }
.about-inner { display: flex; align-items: center; gap: 40px; }
.about-mark { display: grid; flex-shrink: 0; place-items: center; width: 118px; height: 118px; border: 1px solid #6b8261; border-radius: 50%; color: #c2d19f; }
.about-mark .icon { width: 62px; height: 62px; stroke-width: 1; }
.about-section .eyebrow { color: #bdcc9e; font-size: 9px; }
.about-section h2 { margin-top: 10px; font-size: 21px; }
.about-section p:not(.eyebrow) { margin-top: 12px; color: #d2deca; font-size: 12px; }
.about-section p.about-disclaimer { max-width: 730px; font-size: 10px; color: #c0d1bc; }
.site-footer { padding-block: 24px; background: var(--paper); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-brand { display: flex; align-items: baseline; gap: 12px; font-size: 16px; font-weight: 750; }
.footer-brand span { font-size: 9px; font-weight: 400; }
.site-footer small { color: var(--muted); font-size: 8px; letter-spacing: .12em; }
.back-top { display: flex; align-items: center; gap: 15px; min-height: 44px; font-size: 10px; }
.back-top span { font-size: 20px; }

@media (min-width: 1440px) {
  .hero-grid { gap: 80px; }
}

@media (max-width: 1050px) {
  .container { width: calc(100% - 64px); }
  .site-nav { gap: 18px; font-size: 11px; }
  .site-nav .nav-about { padding-left: 17px; font-size: 10px; gap: 7px; }
  .brand-name { font-size: 21px; }
  .hero-grid { gap: 25px; }
  .hero-visual { padding-inline: 18px; }
  .content-grid { gap: 16px; }
  .content-card { padding-inline: 19px; }
  .guide-grid, .updates-grid { gap: 45px; }
}

@media (max-width: 800px) {
  html { scroll-padding-top: 95px; }
  .container { width: calc(100% - 48px); }
  .site-header { position: static; }
  .js .site-header { position: sticky; }
  .header-inner { flex-wrap: wrap; gap: 0; min-height: 77px; }
  .brand { margin-block: 14px; }
  .brand-mark { width: 42px; height: 42px; }
  .brand-name { font-size: 20px; }
  .brand-subtitle { font-size: 9px; }
  .site-nav { flex-basis: 100%; flex-wrap: wrap; justify-content: center; gap: 6px 24px; padding-block: 7px 15px; border-top: 1px solid var(--line); }
  .site-nav .nav-about { border: 0; padding-left: 0; font-size: 11px; }
  .js .site-nav { display: none; }
  .js .site-nav.is-open { display: flex; }
  .menu-toggle { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 8px 0 8px 12px; border: 0; color: var(--green); background: transparent; cursor: pointer; font-size: 11px; }
  .menu-lines { position: relative; width: 20px; height: 14px; border-block: 1px solid currentColor; }
  .menu-lines::after { position: absolute; top: 5px; left: 0; width: 20px; border-top: 1px solid currentColor; content: ""; }
  .menu-toggle[aria-expanded="true"] .menu-lines { border: 0; }
  .menu-toggle[aria-expanded="true"] .menu-lines::before, .menu-toggle[aria-expanded="true"] .menu-lines::after { position: absolute; top: 6px; left: 0; width: 20px; border-top: 1px solid currentColor; transform: rotate(45deg); content: ""; }
  .menu-toggle[aria-expanded="true"] .menu-lines::after { transform: rotate(-45deg); }
  .hero-grid { padding-block: 38px 26px; gap: 20px; }
  h1 { font-size: clamp(30px, 4.6vw, 39px); }
  .hero-description { font-size: 12px; }
  .hero-copy > .eyebrow { font-size: 9px; letter-spacing: .1em; }
  .hero-visual { align-self: center; padding: 45px 16px 18px; }
  .visual-topline { inset: 18px 17px auto; font-size: 7px; }
  .visual-topline span:first-child { padding: 3px 7px; }
  .visual-caption { font-size: 10px; }
  .illustration-label { font-size: 6px; }
  .button { gap: 18px; padding-inline: 18px; min-height: 54px; font-size: 11px; }
  .hero-note { font-size: 9px; }
  .section-space { padding-block: 64px; }
  .section-heading { display: block; }
  .section-description { margin-top: 15px; }
  .content-grid { gap: 12px; }
  .content-card { padding: 17px 14px; }
  .card-illustration { height: 117px; }
  .card-illustration::before { width: 92px; height: 92px; }
  .orbit-one { width: 119px; height: 92px; }
  .orbit-two { right: calc(50% - 63px); }
  .card-eyebrow { font-size: 7px; letter-spacing: .08em; }
  .content-card h3 { font-size: 20px; }
  .card-description { font-size: 11px; }
  .card-footer p { font-size: 9px; }
  .card-link { font-size: 10px; }
  .guide-grid, .updates-grid { grid-template-columns: 1fr; gap: 30px; }
  .guide-intro > p:not(.eyebrow) { max-width: 520px; }
  .guide-stamp { margin-top: 18px; }
  .about-inner { gap: 25px; }
  .about-mark { width: 85px; height: 85px; }
  .about-mark .icon { width: 45px; height: 45px; }
  .about-section h2 { font-size: 18px; }
  .footer-inner { flex-wrap: wrap; gap: 12px 24px; }
  .site-footer small { display: none; }
}

@media (max-width: 600px) {
  .container { width: calc(100% - 40px); }
  .hero-grid { grid-template-columns: 1fr; padding-top: 23px; gap: 28px; }
  .hero-copy { padding-block: 15px 0; }
  .hero-copy > .eyebrow { font-size: 10px; letter-spacing: .13em; }
  h1 { margin-top: 19px; font-size: clamp(34px, 8.6vw, 49px); line-height: 1.5; }
  .hero-description { margin-top: 18px; font-size: 13px; }
  .desktop-break { display: none; }
  .button { min-height: 56px; margin-top: 24px; padding-inline: 22px; gap: 36px; font-size: 12px; }
  .hero-note { margin-top: 11px; font-size: 10px; }
  .hero-visual { width: 100%; max-width: 440px; justify-self: center; padding: 20px 20px 17px; border-radius: 43% 43% 5px 5px; }
  .hero-beetle { width: 88%; margin: 6px auto -20px; }
  .visual-topline { inset: 19px 19px auto; font-size: 8px; }
  .visual-caption { font-size: 11px; }
  .illustration-label { font-size: 7px; }
  .hero-bottom { padding-bottom: 11px; font-size: 9px; }
  .hero-bottom a { gap: 11px; font-size: 8px; }
  .section-space { padding-block: 54px; }
  .eyebrow { font-size: 10px; }
  h2 { font-size: 26px; line-height: 1.65; }
  .mobile-break { display: initial; }
  .section-heading { margin-bottom: 26px; }
  .section-description { font-size: 12px; }
  .content-grid { grid-template-columns: 1fr; gap: 18px; }
  .content-card { display: grid; grid-template-columns: 1fr 100px; column-gap: 10px; padding: 22px; }
  .card-topline { grid-column: 1 / -1; margin-bottom: 24px; }
  .card-illustration { grid-column: 2; grid-row: 4; align-self: center; margin: 0 -8px 0 0; height: 122px; }
  .card-illustration .icon { width: 56px; height: 56px; }
  .card-illustration::before { width: 87px; height: 87px; }
  .orbit-one { width: 100px; height: 86px; }
  .orbit-two { right: 0; top: 24px; }
  .card-eyebrow { grid-column: 1; font-size: 8px; }
  .content-card h3 { grid-column: 1 / -1; margin-top: 4px; font-size: 23px; }
  .card-description { grid-column: 1; margin-top: 10px; margin-bottom: 20px; font-size: 12px; }
  .card-description br { display: none; }
  .card-footer, .card-link { grid-column: 1 / -1; }
  .card-footer p { font-size: 11px; }
  .card-link { min-height: 48px; font-size: 12px; }
  .content-note { font-size: 10px; }
  .guide-intro > p:not(.eyebrow) { margin-top: 18px; font-size: 12px; }
  .note summary { gap: 13px; min-height: 76px; font-size: 13px; }
  .note-body { padding-left: 32px; padding-right: 0; }
  .updates-grid { gap: 26px; }
  .about-section { padding-block: 40px; }
  .about-inner { display: block; }
  .about-mark { width: 57px; height: 57px; margin-bottom: 23px; }
  .about-mark .icon { width: 34px; height: 34px; }
  .about-section h2 { font-size: 19px; }
  .footer-inner { align-items: flex-start; gap: 13px; }
  .footer-brand { display: block; font-size: 15px; }
  .footer-brand span { display: block; margin-top: 2px; font-size: 9px; }
  .back-top { min-height: 44px; font-size: 9px; gap: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}