:root {
  --kokemidori: #2D5A2D;
  --wakaba: #6B8E5A;        /* 装飾・罫・ホバー枠用（UIコンポーネント） */
  --wakaba-deep: #42693A;   /* 小さな情報テキスト用（AA 4.5+ on 生成り） */
  --wakaba-light: #9DB889;  /* 暗背景上のラベル用 */
  --shu: #A0382A;
  --kinari: #FAF7F2;
  --tonoko: #EDE7DC;
  --sumimidori: #0F1A0F;
  --shikkoku: #1A1A1A;
  --nibiiro: #5A606B;       /* 補足テキスト（AA 5.9 on 生成り・実測で#6B7280から濃色化） */
  --usuzumi: #D6CFC2;

  --space-section: 100px;
  --space-section-compact: 88px;

  --serif-jp: 'Noto Serif JP', 'Yu Mincho', 'Hiragino Mincho ProN', serif;
  --serif-en: 'Cormorant Garamond', 'Times New Roman', serif;
  --sans-jp: 'Noto Sans JP', -apple-system, 'Hiragino Sans', 'Yu Gothic UI', sans-serif;
  --sans-en: 'Inter', -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--kinari);
  color: var(--shikkoku);
  font-family: var(--sans-jp);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--kokemidori); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--kokemidori);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
}
.skip:focus { left: 12px; top: 12px; text-decoration: none; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ====== Header ====== */
header.site {
  position: sticky;
  top: 0;
  background: rgba(250, 247, 242, 0.9);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--usuzumi);
  z-index: 30;
}
header.site .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
header.site .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--serif-jp);
  font-size: 18px;
  font-weight: 600;
  color: var(--kokemidori);
  letter-spacing: 0.04em;
}
header.site .brand:hover { text-decoration: none; }
header.site .brand img { width: 36px; height: 36px; }
header.site nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 28px;
}
header.site nav a {
  font-size: 13px;
  color: var(--shikkoku);
  letter-spacing: 0.1em;
  font-family: var(--serif-en);
  position: relative;
}
header.site nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--kokemidori);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
header.site nav a:hover { text-decoration: none; }
header.site nav a:hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--usuzumi);
  border-radius: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--kokemidori);
  transition: transform 0.2s ease;
}

/* ====== Buttons ====== */
.btn {
  display: inline-block;
  font-family: var(--serif-en);
  font-size: 14px;
  letter-spacing: 0.12em;
  padding: 13px 28px;
  border-radius: 999px;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn.primary { background: var(--kokemidori); color: var(--kinari); }
.btn.primary:hover { background: #244a24; }
.btn.ghost { border: 1px solid var(--kokemidori); color: var(--kokemidori); }
.btn.ghost:hover { background: var(--kokemidori); color: var(--kinari); }

/* ====== Hero ====== */
.hero {
  padding: 110px 0 120px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(rgba(45, 90, 45, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 90, 45, 0.035) 1px, transparent 1px),
    radial-gradient(ellipse 70% 60% at 50% -10%, rgba(107, 142, 90, 0.18), transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 120%, rgba(160, 56, 42, 0.07), transparent 70%);
  background-size: 28px 28px, 28px 28px, auto, auto;
}
.hero .mark {
  width: 116px;
  height: 116px;
  margin: 0 auto 32px;
  opacity: 0.97;
  filter: drop-shadow(0 8px 20px rgba(45, 90, 45, 0.12));
}
.hero h1 {
  margin: 0 0 10px;
  font-family: var(--serif-jp);
  font-size: clamp(38px, 5.5vw, 60px);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--kokemidori);
}
.hero .en {
  margin: 0 0 30px;
  font-family: var(--serif-en);
  font-size: clamp(13px, 1.5vw, 17px);
  font-weight: 500;
  letter-spacing: 0.34em;
  color: var(--wakaba-deep);
  text-transform: uppercase;
}
.hero .tagline {
  font-family: var(--serif-jp);
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 500;
  color: var(--shikkoku);
  margin: 0 0 26px;
  letter-spacing: 0.05em;
}
.hero .lead {
  max-width: 640px;
  margin: 0 auto 40px;
  color: var(--nibiiro);
  font-size: 15px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--usuzumi), transparent);
}

/* ====== Section ====== */
section { padding: var(--space-section) 0; }
.products,
.works { padding: var(--space-section-compact) 0; }
section .section-head {
  text-align: center;
  margin-bottom: 56px;
}
section .section-head .kicker {
  display: block;
  font-family: var(--serif-en);
  font-size: 12px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--wakaba-deep);
  margin-bottom: 12px;
}
section .section-head .kicker::after {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  margin: 12px auto 0;
  background: var(--shu);
}
section h2 {
  margin: 0;
  font-family: var(--serif-jp);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 600;
  color: var(--kokemidori);
  letter-spacing: 0.06em;
}

/* ====== About ====== */
.about { background: var(--tonoko); }
.about .lead-text {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
  color: var(--shikkoku);
  font-size: 16px;
  line-height: 1.95;
}
.about .pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.about .field {
  position: relative;
  background: var(--kinari);
  border: 1px solid var(--usuzumi);
  border-radius: 12px;
  padding: 34px 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.about .field::before {
  content: "";
  position: absolute;
  top: 26px;
  right: 26px;
  width: 9px;
  height: 13px;
  border-radius: 10px 10px 10px 2px;
  background: rgba(107, 142, 90, 0.3);
  transform: rotate(35deg);
}
.about .field:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 26px rgba(45, 90, 45, 0.07);
}
.about .field .label-en {
  font-family: var(--serif-en);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--wakaba-deep);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.about .field h3 {
  margin: 0 0 10px;
  font-family: var(--serif-jp);
  font-size: 19px;
  font-weight: 600;
  color: var(--kokemidori);
}
.about .field p {
  margin: 0;
  font-size: 13.5px;
  color: var(--nibiiro);
  line-height: 1.8;
}

/* ====== Products / Works ====== */
.products .grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.works { background: var(--tonoko); }
.works .grid.two {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
}
.product {
  background: #fff;
  border: 1px solid var(--usuzumi);
  border-radius: 12px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  color: var(--shikkoku);
  box-shadow: 0 1px 0 rgba(15, 26, 15, 0.04);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.product:hover {
  transform: translateY(-4px);
  border-color: var(--wakaba);
  box-shadow: 0 10px 24px rgba(45, 90, 45, 0.08);
  text-decoration: none;
}
.product .top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.product .name {
  font-family: var(--serif-jp);
  font-size: 21px;
  font-weight: 600;
  color: var(--kokemidori);
  margin: 0;
}
.product .status {
  font-family: var(--serif-en);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--nibiiro);
  text-transform: uppercase;
  padding: 4px 11px;
  border: 1px solid var(--usuzumi);
  border-radius: 999px;
  white-space: nowrap;
}
.product .status.live {
  color: var(--kokemidori);
  border-color: var(--kokemidori);
  position: relative;
}
.product .domain {
  font-family: var(--serif-en);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--wakaba-deep);
}
.product p {
  margin: 0;
  color: var(--shikkoku);
  font-size: 14.5px;
  line-height: 1.8;
}
.product .meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
  font-size: 12px;
  color: var(--nibiiro);
}
.product .meta span::before { content: "—"; margin-right: 6px; }
.product .open {
  margin-top: auto;
  padding-top: 6px;
  font-family: var(--serif-en);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--shu);
  transition: transform 0.2s ease;
}
.product:hover .open { transform: translateX(4px); }

/* ====== Contact ====== */
.contact {
  background: var(--sumimidori);
  color: var(--kinari);
}
.contact h2 { color: var(--kinari); }
.contact .section-head .kicker { color: var(--wakaba-light); }
.contact .card {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}
.contact .card::after {
  content: "Y";
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-top: 30px;
  color: var(--shu);
  border: 1px solid currentColor;
  border-radius: 6px;
  font-family: var(--serif-en);
  font-size: 22px;
  opacity: 0.7;
}
.contact .card p {
  color: rgba(250, 247, 242, 0.72);
  margin: 0 0 26px;
}
.contact .email {
  display: inline-block;
  font-family: var(--serif-en);
  font-size: 19px;
  letter-spacing: 0.1em;
  color: var(--kinari);
  border-bottom: 1px solid var(--wakaba);
  padding-bottom: 4px;
}
.contact .email:hover {
  color: var(--wakaba);
  text-decoration: none;
}

/* ====== Footer ====== */
footer.site {
  background: var(--sumimidori);
  color: rgba(250, 247, 242, 0.6);
  padding: 32px 0;
  border-top: 1px solid rgba(250, 247, 242, 0.1);
}
footer.site .inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
  font-family: var(--serif-en);
  letter-spacing: 0.15em;
}

/* ====== Reveal ====== */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ====== Focus ====== */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--shu);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ====== Responsive ====== */
@media (max-width: 880px) {
  .container { padding: 0 24px; }
  .pc-only { display: none; }
  .hero .lead { max-width: 34em; font-size: 14.5px; line-height: 1.85; }
  .nav-toggle { display: flex; }
  header.site nav ul {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--kinari);
    border-bottom: 1px solid var(--usuzumi);
    padding: 8px 32px 16px;
    display: none;
  }
  header.site nav ul.open { display: flex; }
  header.site nav a {
    display: block;
    padding: 14px 0;
    font-size: 14px;
    border-bottom: 1px solid var(--usuzumi);
  }
  header.site nav ul li:last-child a { border-bottom: none; }
  .about .pillars { grid-template-columns: 1fr; }
  .products .grid,
  .works .grid.two { grid-template-columns: 1fr; }
  section { padding: 72px 0; }
  .products,
  .works { padding: 64px 0; }
  .hero { padding: 72px 0 84px; }
  footer.site .inner { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 520px) {
  .product .top { flex-direction: column; align-items: flex-start; gap: 8px; }
  .product { padding: 26px 22px; }
}

@media (max-width: 420px) {
  .container { padding: 0 20px; }
}