/* ==========================================================================
   株式会社フュージョンコーチング — style.css
   トークン定義は DESIGN_SYSTEM.md に準拠
   ========================================================================== */

:root {
  /* 配色 */
  --color-bg: #FFFFFF;
  --color-bg-sub: #F6F6F4;
  --color-bg-sub-deep: #EFEFEA;
  --color-ink: #1A1A1A;
  --color-text: #3A3A38;
  --color-muted: #77776F;
  --color-line: #E4E4DF;
  --color-accent: #26428B;
  --color-accent-dark: #1B2F63;

  /* タイポグラフィ */
  --font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-serif: "Instrument Serif", Georgia, serif;
  --fs-display: clamp(2.5rem, 6.5vw, 4.75rem);
  --fs-h2: clamp(1.75rem, 3.5vw, 2.5rem);
  --fs-h3: clamp(1.125rem, 2vw, 1.375rem);
  --fs-lead: clamp(1rem, 1.6vw, 1.125rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-label: 0.8125rem;

  /* 余白・レイアウト */
  --space-section: clamp(96px, 14vw, 176px);
  --space-block: clamp(48px, 7vw, 88px);
  --space-item: clamp(24px, 4vw, 48px);
  --container: 1120px;
  --container-wide: 1320px;
  --container-narrow: 760px;
  --pad-x: clamp(20px, 5vw, 48px);

  /* その他 */
  --header-h: 72px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* --------------------------------------------------------------------------
   リセット・ベース
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font-jp);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 2;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: anywhere;
}

h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; height: auto; display: block; }
em { font-style: normal; }

a { color: inherit; }
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.section--dark a:focus-visible,
.section--dark button:focus-visible,
.section--dark input:focus-visible,
.section--dark textarea:focus-visible,
.site-footer a:focus-visible {
  outline-color: #FFFFFF;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}
.container--wide { max-width: var(--container-wide); }
.container--narrow { max-width: var(--container-narrow); }

.pc-only { display: none; }
@media (min-width: 768px) {
  .pc-only { display: inline; }
}

/* スキップリンク */
.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--color-ink);
  color: #fff;
  font-size: var(--fs-small);
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

/* --------------------------------------------------------------------------
   ヘッダー
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  background: var(--color-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--color-line); }

.site-header__inner {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--pad-x);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header__logo {
  position: relative;
  z-index: 95; /* 開いたモバイルメニュー(z:90)より前面に */
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: 0.06em;
  color: var(--color-ink);
  text-decoration: none;
}
.site-header__mark {
  width: 18px;
  height: 18px;
  flex: none;
  background:
    linear-gradient(var(--color-accent), var(--color-accent)) 6px 6px / 12px 12px no-repeat,
    linear-gradient(var(--color-ink), var(--color-ink)) 0 0 / 12px 12px no-repeat;
  transition: background-position 0.45s var(--ease-out);
}
/* hoverで2つの四角形が寄り合う=「融合」の小さな仕草 */
.site-header__logo:hover .site-header__mark {
  background-position: 4px 4px, 2px 2px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.5vw, 36px);
}
.site-nav__list a:not(.button) {
  position: relative;
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-ink);
  text-decoration: none;
  padding-block: 8px;
}
.site-nav__list a:not(.button)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease-out);
}
.site-nav__list a:not(.button):hover { color: var(--color-accent); }
.site-nav__list a:not(.button):hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ハンバーガー */
.menu-toggle {
  display: none;
  position: relative;
  z-index: 110;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}
.menu-toggle__bar {
  position: absolute;
  left: 10px;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  transition: transform 0.3s var(--ease-out), top 0.3s var(--ease-out);
}
.menu-toggle__bar:nth-child(1) { top: 18px; }
.menu-toggle__bar:nth-child(2) { top: 26px; }
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) { top: 22px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) { top: 22px; transform: rotate(-45deg); }

@media (max-width: 767px) {
  :root { --header-h: 60px; }

  .menu-toggle { display: block; }

  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: grid;
    place-items: center;
    background: var(--color-bg);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }
  .site-nav.is-open { opacity: 1; visibility: visible; }

  .site-nav__list {
    flex-direction: column;
    gap: 28px;
    text-align: center;
  }
  .site-nav__list a:not(.button) { font-size: 1.125rem; }
}

/* --------------------------------------------------------------------------
   ボタン
   -------------------------------------------------------------------------- */
.button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 40px;
  border: 1px solid var(--color-ink);
  border-radius: 999px;
  background: transparent;
  color: var(--color-ink);
  font-family: var(--font-jp);
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, transform 0.3s var(--ease-out);
}
.button:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  transform: translateY(-1px);
}
.button:active { transform: translateY(0); }
.button__arrow {
  transition: transform 0.3s ease;
}
.button:hover .button__arrow { transform: translateX(4px); }

.button--small { padding: 9px 24px; }

.button--invert {
  border-color: #fff;
  color: #fff;
}
.button--invert:hover {
  background: #fff;
  border-color: #fff;
  color: var(--color-ink);
}

/* --------------------------------------------------------------------------
   セクション共通
   -------------------------------------------------------------------------- */
.section { padding-block: var(--space-section); }
.section--sub { background: var(--color-bg-sub); }
.section--sub-deep { background: var(--color-bg-sub-deep); }
.section--dark {
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.86);
}

/* セクションラベル: 上から降りてくる1pxのスレッドラインで前のセクションと接続する */
.section-label {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-top: clamp(44px, 6vw, 72px);
  margin-bottom: clamp(20px, 3vw, 32px);
}
.section-label::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1px;
  width: 1px;
  height: clamp(32px, 4.5vw, 52px);
  background: linear-gradient(to bottom, var(--color-line), var(--color-accent));
  transform-origin: top;
  transition: transform 1s var(--ease-out) 0.1s;
}
.section-label__num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.9375rem;
  color: var(--color-muted);
  letter-spacing: 0.05em;
}
.section-label em {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--color-accent);
}
.section-label > span:not(.section-label__num) {
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--color-muted);
}
.section-label--invert::before {
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.55));
}
.section-label--invert em { color: rgba(255, 255, 255, 0.9); }
.section-label--invert > span:not(.section-label__num) { color: rgba(255, 255, 255, 0.6); }
.section-label--invert .section-label__num { color: rgba(255, 255, 255, 0.5); }

.section-title {
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--color-ink);
  margin-bottom: var(--space-block);
}
.section--dark .section-title { color: #fff; }

/* --------------------------------------------------------------------------
   1. ファーストビュー
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: min(92svh, 900px);
  padding-top: var(--header-h);
  overflow: hidden;
}
.hero > .container { position: relative; z-index: 1; }

/* ブランドモチーフ: 「2つの流れが編み合わさり、1本になる」
   墨と藍、2束の細い糸がCanvas上で合流し、編み込まれながら流れ続ける。
   各セクションラベルのスレッドラインは、この束から続く1本の糸。 */
.hero__motif {
  position: absolute;
  z-index: 0;
  top: 50%;
  right: clamp(-40px, 3vw, 120px);
  width: min(46vw, 600px);
  aspect-ratio: 1.25;
  transform: translateY(calc(-52% + var(--pscroll, 0) * 1px));
  pointer-events: none;
}
.hero__motif-canvas {
  display: block;
  width: 100%;
  height: 100%;
}
@media (max-width: 767px) {
  .hero__motif {
    top: 24%;
    right: -16vw;
    width: min(84vw, 380px);
    opacity: 0.85;
  }
}
.hero__label {
  margin-bottom: clamp(20px, 3vw, 32px);
}
.hero__label em {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
  letter-spacing: 0.04em;
  color: var(--color-accent);
}
.hero__title {
  font-size: var(--fs-display);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.04em;
  color: var(--color-ink);
}
.hero__lead {
  margin-block: clamp(28px, 4vw, 44px) clamp(36px, 5vw, 56px);
  font-size: var(--fs-lead);
  line-height: 2.2;
}
.hero__scroll {
  position: absolute;
  right: var(--pad-x);
  bottom: 28px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.9375rem;
  color: var(--color-muted);
}
.hero__scroll::after {
  content: "";
  display: block;
  width: 1px;
  height: 40px;
  margin: 10px auto 0;
  background: var(--color-muted);
}

/* --------------------------------------------------------------------------
   2. 会社について
   -------------------------------------------------------------------------- */
.about__grid {
  display: grid;
  gap: var(--space-item);
}
.about__body p + p { margin-top: 1.5em; }

@media (min-width: 1024px) {
  .about__grid {
    grid-template-columns: 5fr 6fr;
    gap: 72px;
  }
  .about__grid .section-title { margin-bottom: 0; }
}

/* --------------------------------------------------------------------------
   3. 事業領域
   -------------------------------------------------------------------------- */
.section-note {
  margin-top: var(--space-block);
  font-size: var(--fs-lead);
  font-weight: 500;
  color: var(--color-ink);
}

/* --------------------------------------------------------------------------
   4. プロジェクト・実績
   -------------------------------------------------------------------------- */
/* エディトリアル・インデックス:
   4事業を罫線区切りの「行」として積む。左マージンを1本の糸(縦線)が貫き、
   各行の起点にロゴと同じ正方形のノードを置く。番号は行の主役。 */
.works-index {
  position: relative;
  border-top: 1px solid var(--color-line);
  margin-top: calc(var(--space-block) * -0.25);
}
.works-index::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 1px;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-line) 60%, transparent);
}

.works-row {
  position: relative;
  display: grid;
  gap: 10px clamp(24px, 4vw, 64px);
  padding: clamp(40px, 6vw, 72px) 0 clamp(40px, 6vw, 72px) clamp(28px, 4.5vw, 64px);
}
/* 行の区切り線: 出現時に左から描かれる */
.works-row::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--color-line);
  transform-origin: left;
  transition: transform 1s var(--ease-out) 0.15s, background-color 0.6s ease;
}
/* 行の起点ノード: ロゴの片割れの小さな正方形 */
.works-row__num {
  position: relative;
}
.works-row__num::before {
  content: "";
  position: absolute;
  top: 0.35em;
  left: calc(-1 * clamp(28px, 4.5vw, 64px) - 2px);
  width: 7px;
  height: 7px;
  background: var(--color-ink);
  transition: background-color 0.5s ease, transform 0.5s var(--ease-out);
}
.works-row__num em {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 0.9;
  color: #E3E3DC;
  transition: color 0.7s ease;
}
.works-row__label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 12px;
}
.works-row__title {
  position: relative;
  display: inline-block;
  font-size: clamp(1.25rem, 2.4vw, 1.625rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--color-ink);
  transition: transform 0.5s var(--ease-out);
}
/* hoverで事業名の下に藍の短い線が伸びる */
.works-row__title::after {
  content: "";
  position: absolute;
  left: 2px;
  bottom: -8px;
  width: 44px;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease-out);
}
.works-row__desc {
  font-size: var(--fs-small);
  line-height: 2.1;
  max-width: 26em;
}

.works-row:hover .works-row__num em { color: var(--color-accent); }
.works-row:hover .works-row__num::before {
  background: var(--color-accent);
  transform: rotate(45deg);
}
.works-row:hover .works-row__title { transform: translateX(6px); }
.works-row:hover .works-row__title::after { transform: scaleX(1); }

/* PC: 番号 | 事業名 | 説明 の3層。偶数行は事業名と説明を左右反転し、視線を蛇行させる */
@media (min-width: 1024px) {
  .works-row {
    grid-template-columns: clamp(120px, 14vw, 190px) 1fr minmax(0, 42%);
    align-items: start;
  }
  .works-row__main { padding-top: 0.5em; }
  .works-row__desc { padding-top: 0.9em; }
  .works-row:nth-child(even) .works-row__main {
    grid-column: 3;
    grid-row: 1;
  }
  .works-row:nth-child(even) .works-row__desc {
    grid-column: 2;
    grid-row: 1;
    justify-self: start;
  }
  .works-row:nth-child(even) .works-row__num {
    grid-column: 1;
    grid-row: 1;
  }
}

/* --------------------------------------------------------------------------
   5. 私たちの考え方
   -------------------------------------------------------------------------- */
.philosophy__list {
  border-top: 1px solid var(--color-line);
}
.philosophy__item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding-block: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--color-line);
}
.philosophy__num em {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.5rem;
  color: var(--color-accent);
}
.philosophy__title {
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-ink);
  margin-bottom: 10px;
}
.philosophy__text {
  font-size: var(--fs-small);
  line-height: 2;
}

/* --------------------------------------------------------------------------
   6. 会社概要
   -------------------------------------------------------------------------- */
.company__table {
  border-top: 1px solid var(--color-line);
}
.company__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding-block: clamp(20px, 3vw, 28px);
  border-bottom: 1px solid var(--color-line);
}
.company__row dt {
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--color-ink);
}
.company__row dd { font-size: var(--fs-small); }
.company__sub { color: var(--color-muted); }

@media (min-width: 768px) {
  .company__row {
    grid-template-columns: 180px 1fr;
    gap: 24px;
  }
}

/* --------------------------------------------------------------------------
   7. お問い合わせ
   -------------------------------------------------------------------------- */
.contact__lead {
  margin-top: calc(var(--space-block) * -0.5);
  margin-bottom: var(--space-block);
}

.contact-form__field {
  margin-bottom: clamp(24px, 3vw, 32px);
}
.contact-form__field label {
  display: block;
  margin-bottom: 10px;
  font-size: var(--fs-small);
  font-weight: 500;
  color: #fff;
}
.contact-form__req {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  font-size: 0.75rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
}
/* スパム対策のおとり項目: 画面外に隠す（display:noneだと検知されやすいため） */
.contact-form__trap {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.contact-form__field input,
.contact-form__field textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-jp);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-ink);
  background: #fff;
  border: 1px solid transparent;
  border-radius: 2px;
  resize: vertical;
}
.contact-form__status {
  min-height: 1.5em;
  margin-bottom: 16px;
  font-size: var(--fs-small);
  color: #fff;
}
.contact__alt {
  margin-top: var(--space-block);
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.7);
}
.contact__alt a { color: #fff; }

/* --------------------------------------------------------------------------
   フッター
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.86);
  padding-block: clamp(48px, 6vw, 72px);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}
.site-footer__logo {
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: 0.06em;
  color: #fff;
  margin-bottom: 28px;
}
.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-bottom: 40px;
}
.site-footer__nav a {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
}
.site-footer__nav a:hover { color: #fff; }
.site-footer__copy {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.5);
}

/* --------------------------------------------------------------------------
   スクロール出現アニメーション
   （JSが .js-reveal を付与。JS無効時は常時表示のまま）
   -------------------------------------------------------------------------- */
.js-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: calc(var(--reveal-delay, 0) * 80ms);
}
.js-reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* 出現のバリエーション: ラベルの線は上から描かれる */
.section-label.js-reveal:not(.is-visible)::before { transform: scaleY(0); }

/* 実績の行: 行全体のフェードはやめ、番号→英語ラベル→事業名→説明文の順に時間差で現れる。
   区切り罫線は左から描かれる */
.works-row.js-reveal {
  opacity: 1;
  transform: none;
  transition: none;
}
.works-row .works-row__num em { display: inline-block; }
.works-row.js-reveal .works-row__num em,
.works-row.js-reveal .works-row__label,
.works-row.js-reveal .works-row__title,
.works-row.js-reveal .works-row__desc {
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.works-row.js-reveal .works-row__label { transition-delay: 0.1s; }
.works-row.js-reveal .works-row__title { transition-delay: 0.18s; }
.works-row.js-reveal .works-row__desc { transition-delay: 0.28s; }
.works-row.js-reveal:not(.is-visible) .works-row__num em,
.works-row.js-reveal:not(.is-visible) .works-row__label,
.works-row.js-reveal:not(.is-visible) .works-row__title,
.works-row.js-reveal:not(.is-visible) .works-row__desc {
  opacity: 0;
  transform: translateY(14px);
}
.works-row.js-reveal:not(.is-visible)::after { transform: scaleX(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .works-row.js-reveal .works-row__num em,
  .works-row.js-reveal .works-row__label,
  .works-row.js-reveal .works-row__title,
  .works-row.js-reveal .works-row__desc {
    opacity: 1 !important;
    transform: none !important;
    transition: none;
  }
  .works-row::after { transform: none !important; transition: none; }
  .works-row__num::before,
  .works-row__title,
  .works-row__title::after { transition: none; }
  .section-label::before { transform: none !important; transition: none; }
  .hero__motif { transform: translateY(-52%); }
  .button,
  .button__arrow,
  .site-header__mark,
  .site-nav__list a:not(.button)::after {
    transition: none;
  }
}

/* --------------------------------------------------------------------------
   下層ページ（プライバシーポリシー）
   -------------------------------------------------------------------------- */
.page-body {
  padding-top: calc(var(--header-h) + var(--space-block));
  padding-bottom: var(--space-section);
}
.page-body h1 {
  font-size: var(--fs-h2);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-ink);
  margin-bottom: var(--space-block);
}
.page-body h2 {
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--color-ink);
  margin: 2.5em 0 0.75em;
}
.page-body p + p { margin-top: 1em; }
.page-body ul {
  list-style: disc;
  padding-left: 1.5em;
}