/* ============================================================
   YOTSUBA CRAFT / style.css
   Design concept: flymee.co.jp を参照した
   エディトリアル・ステートメント主導のコーポレートサイト
   - 白基調 / 大きな余白 / 大胆な見出しタイポグラフィ
   - Message / Philosophy / Service / Company の編集構成
   - Webフォント: モリサワ TypeSquare（お名前.comレンタルサーバー提供）
     見出し: UD新ゴNT B（UD Shin Go NT Bold）
     本文  : UD新ゴNT L（UD Shin Go NT Light）
     強調  : A1明朝（A1 Mincho）※PHILOSOPHYの大見出し等、任意箇所のみ
   ============================================================ */

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "UD Shin Go NT Light", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Noto Sans JP", sans-serif;
  color: #141414;
  background-color: #ffffff;
  line-height: 1.9;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

/* ---------- Design tokens ---------- */
:root {
  --font-heading: "UD Shin Go NT Bold", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-body: "UD Shin Go NT Light", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-mincho: "A1 Mincho", "Hiragino Mincho ProN", serif;
  --color-accent: #5f7f73;
  --color-text: #141414;
  --color-sub: #6f6f6f;
  --color-line: #e8e8e8;
  --color-bg-soft: #f7f7f5;
  --ease-slow: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-slow: 0.9s;
  --duration-mid: 0.5s;
  --duration-fast: 0.3s;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 40px;
}

.container-narrow {
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ---------- 見出し全般に UD新ゴNT Bold を適用 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo img {
  height: 34px;
  width: auto;
  display: block;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text .en {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.logo-text .jp {
  margin-top: 2px;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--color-sub);
}

nav .nav-list {
  display: flex;
  gap: 40px;
}

nav .nav-list a {
  position: relative;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--color-text);
  padding-bottom: 6px;
}

nav .nav-list a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: all var(--duration-mid) var(--ease-slow);
}

nav .nav-list a:hover::after,
nav .nav-list a.is-active::after {
  left: 0;
  width: 100%;
}

nav .nav-list a.is-active {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  width: 32px;
  height: 22px;
  background: none;
  border: none;
  position: relative;
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-text);
  transition: all var(--duration-fast) ease;
}

.nav-toggle span { top: 50%; }
.nav-toggle span::before { top: -8px; }
.nav-toggle span::after { top: 8px; }

/* ============================================================
   STATEMENT HERO（flymee: 「解釈に自由を」を参照）
   大きなコピーだけで一画面を構成する
   ============================================================ */
.statement-hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 160px 0 80px;
  background: #ffffff;
}

.statement-hero .eyebrow-en {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--color-sub);
  margin-bottom: 40px;
}

.statement-copy {
  font-family: var(--font-heading);
  font-size: clamp(30px, 5.2vw, 64px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: 0.06em;
}

.statement-copy .accent {
  color: var(--color-accent);
}

.statement-lead {
  margin-top: 56px;
  max-width: 620px;
  font-size: 15px;
  color: var(--color-sub);
  line-height: 2.1;
}

.statement-scroll {
  margin-top: 100px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--color-sub);
}

.statement-scroll::after {
  content: "";
  width: 1px;
  height: 48px;
  background: var(--color-sub);
  animation: scrollLine 2.4s var(--ease-slow) infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  50.01% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- Page hero (下層ページの見出し部) ---------- */
.page-hero {
  padding: 200px 0 100px;
  border-bottom: 1px solid var(--color-line);
}

.page-hero .eyebrow-en {
  display: block;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--color-accent);
  margin-bottom: 28px;
}

.page-hero h1 {
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.5;
}

.page-hero .lead {
  margin-top: 32px;
  max-width: 640px;
  font-size: 14.5px;
  color: var(--color-sub);
  line-height: 2;
}

/* ---------- Section common ---------- */
.section {
  padding: 140px 0;
}

.section-tight {
  padding: 100px 0;
}

.section-alt {
  background: var(--color-bg-soft);
}

.section-divider {
  border-top: 1px solid var(--color-line);
}

.section-head {
  margin-bottom: 80px;
}

.section-head.center {
  text-align: center;
}

.eyebrow {
  display: block;
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.section-head h2 {
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.6;
}

.section-head p {
  margin-top: 24px;
  max-width: 640px;
  color: var(--color-sub);
  font-size: 14px;
  line-height: 2;
}

.section-head.center p {
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Editorial copy block（メッセージ・理念など長文コピー用）---------- */
.editorial-copy {
  font-family: var(--font-mincho);
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 700;
  line-height: 2.1;
  letter-spacing: 0.04em;
}

.editorial-copy + .editorial-copy {
  margin-top: 40px;
}

.body-copy {
  font-size: 14.5px;
  color: var(--color-sub);
  line-height: 2.2;
}

.body-copy + .body-copy {
  margin-top: 28px;
}

/* ---------- Message page（代表メッセージ）---------- */
.message-block {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 64px;
}

.message-signature {
  padding-top: 4px;
}

.message-signature .role {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--color-sub);
  margin-bottom: 12px;
}

.message-signature .name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.message-signature .name small {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--color-sub);
}

@media (max-width: 780px) {
  .message-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ---------- Philosophy page ---------- */
.philosophy-hero-copy {
  font-family: var(--font-mincho);
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.8;
  letter-spacing: 0.05em;
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.pillar {
  background: #fff;
  padding: 56px 40px;
}

.pillar .label {
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.pillar h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.7;
  margin-bottom: 20px;
}

.pillar p {
  font-size: 13.5px;
  color: var(--color-sub);
  line-height: 1.95;
}

.value-list {
  border-top: 1px solid var(--color-line);
}

.value-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 32px;
  padding: 36px 0;
  border-bottom: 1px solid var(--color-line);
}

.value-item .num {
  font-family: var(--font-heading);
  font-size: 14px;
  color: var(--color-accent);
  letter-spacing: 0.06em;
  padding-top: 2px;
}

.value-item h4 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.value-item p {
  font-size: 13.5px;
  color: var(--color-sub);
  line-height: 1.9;
}

@media (max-width: 860px) {
  .pillar-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Fade-in on scroll ---------- */
.fadein {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--duration-slow) var(--ease-slow),
    transform var(--duration-slow) var(--ease-slow);
}

.fadein.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fadein-group .fadein:nth-child(1) { transition-delay: 0s; }
.fadein-group .fadein:nth-child(2) { transition-delay: 0.12s; }
.fadein-group .fadein:nth-child(3) { transition-delay: 0.24s; }
.fadein-group .fadein:nth-child(4) { transition-delay: 0.36s; }

.statement-hero .fadein {
  transform: translateY(46px);
  transition: opacity 1.1s var(--ease-slow),
    transform 1.1s var(--ease-slow);
}

.statement-hero .eyebrow-en.fadein { transition-delay: 0.1s; }
.statement-hero .statement-copy.fadein { transition-delay: 0.3s; }
.statement-hero .statement-lead.fadein { transition-delay: 0.6s; }
.statement-hero .statement-scroll.fadein { transition-delay: 0.85s; }

.page-hero .fadein {
  transform: translateY(40px);
  transition: opacity 1s var(--ease-slow),
    transform 1s var(--ease-slow);
}
.page-hero .eyebrow-en.fadein { transition-delay: 0.1s; }
.page-hero h1.fadein { transition-delay: 0.3s; }
.page-hero .lead.fadein { transition-delay: 0.5s; }

/* ---------- Top page: overview cards linking to Message/Philosophy/Service/Company ---------- */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.overview-card {
  background: #fff;
  padding: 64px 48px;
  display: flex;
  flex-direction: column;
  min-height: 280px;
  transition: background var(--duration-mid) var(--ease-slow);
}

.overview-card:hover {
  background: var(--color-bg-soft);
}

.overview-card .tag {
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  margin-bottom: 28px;
}

.overview-card h3 {
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.04em;
}

.overview-card p {
  margin-top: 20px;
  font-size: 13px;
  color: var(--color-sub);
  line-height: 1.95;
  flex-grow: 1;
}

.overview-card .more {
  margin-top: 28px;
  font-size: 12px;
  letter-spacing: 0.14em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.overview-card .more::after {
  content: "";
  width: 20px;
  height: 1px;
  background: currentColor;
  transition: width var(--duration-mid) var(--ease-slow);
}

.overview-card:hover .more::after {
  width: 32px;
}

@media (max-width: 780px) {
  .overview-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Card grid (services) ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.card {
  background: #fff;
  padding: 48px 40px;
  transition: transform var(--duration-mid) var(--ease-slow),
    box-shadow var(--duration-mid) var(--ease-slow);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.07);
  position: relative;
  z-index: 2;
  background: #fff;
}

.card .num {
  font-family: var(--font-heading);
  display: block;
  font-size: 13px;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

.card h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.card p {
  font-size: 13.5px;
  color: var(--color-sub);
  line-height: 1.9;
}

/* ---------- Flow ---------- */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  position: relative;
}

.flow-grid::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: var(--color-line);
}

.flow-step { position: relative; }

.flow-num {
  font-family: var(--font-heading);
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-bottom: 28px;
  font-size: 11px;
  color: var(--color-accent);
  background: #fff;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
}

.flow-step h3 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.flow-step p {
  font-size: 13px;
  color: var(--color-sub);
  line-height: 1.8;
}

@media (max-width: 860px) {
  .flow-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .flow-grid::before { display: none; }
}

/* ---------- Service block ---------- */
.service-block {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  padding: 56px 0;
  border-top: 1px solid var(--color-line);
}

.service-block:last-of-type {
  border-bottom: 1px solid var(--color-line);
}

.service-block .index {
  font-family: var(--font-heading);
  font-size: 15px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

.service-block h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.service-block p {
  color: var(--color-sub);
  font-size: 14px;
  max-width: 640px;
}

/* ---------- Info table ---------- */
.info-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--color-line);
}

.info-table tr {
  border-bottom: 1px solid var(--color-line);
  transition: background var(--duration-fast) ease;
}

.info-table tr:hover {
  background: var(--color-bg-soft);
}

.info-table th,
.info-table td {
  text-align: left;
  padding: 24px 16px;
  vertical-align: top;
  font-size: 14px;
}

.info-table th {
  width: 200px;
  font-weight: 600;
  color: var(--color-sub);
  letter-spacing: 0.06em;
}

.info-table td {
  color: var(--color-text);
  line-height: 1.9;
}

/* ---------- History (沿革) ---------- */
.history-list {
  border-top: 1px solid var(--color-line);
}

.history-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-line);
}

.history-item .year {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.history-item p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.9;
}

@media (max-width: 640px) {
  .history-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

/* ---------- CTA band ---------- */
.cta-band {
  padding: 120px 0;
  text-align: center;
  background: var(--color-text);
  color: #fff;
}

.cta-band .eyebrow { color: #c9d6d0; }

.cta-band h2 {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  margin-bottom: 32px;
  letter-spacing: 0.06em;
  line-height: 1.6;
}

.btn {
  font-family: var(--font-heading);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  font-size: 13px;
  letter-spacing: 0.1em;
  border: 1px solid var(--color-text);
  transition: all var(--duration-mid) var(--ease-slow);
}

.btn-primary {
  background: var(--color-text);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-ghost:hover {
  background: var(--color-text);
  color: #fff;
}

.cta-band .btn-primary {
  background: #fff;
  color: var(--color-text);
  border-color: #fff;
}

.cta-band .btn-primary:hover {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 64px 0 40px;
  border-top: 1px solid var(--color-line);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
  padding-bottom: 48px;
}

.footer-brand .logo-text .en {
  font-size: 16px;
}

.footer-nav {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-sub);
  transition: color var(--duration-fast) ease;
}

.footer-nav a:hover { color: var(--color-accent); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid var(--color-line);
}

.copyright {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #b0b0b0;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .card-grid { grid-template-columns: 1fr; }
  .service-block { grid-template-columns: 1fr; gap: 12px; }
  .message-block { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }

  nav .nav-list {
    position: absolute;
    top: 84px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--color-line);
    padding: 24px 32px;
    gap: 24px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--duration-mid) var(--ease-slow);
  }

  nav .nav-list.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .section { padding: 88px 0; }
  .statement-hero { padding: 140px 0 60px; min-height: auto; }
  .page-hero { padding: 140px 0 64px; }
  .footer-top { flex-direction: column; }
}