/* ============================================================
   ガースー株式会社 — 会社概要版（コーポレートサイト）
   資料の世界観に合わせて：黒 × 鮮やかなグリーン、力強いゴシック。
   静的・レスポンシブ・スクロール演出つき。
   ============================================================ */

:root {
  --bg:        #f4f3ee;   /* warm white      */
  --ink:       #14130f;   /* near-black      */
  --muted:     #8a877e;   /* muted gray      */
  --line:      #e2ddd1;   /* hairline        */
  --accent:    #119a4e;   /* deep green（文字アクセント）*/
  --green:     #1fd166;   /* vivid green（ロゴ・主役）*/
  --dark:      #14130f;   /* dark section bg */
  --max:       1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP",
               "Yu Gothic", "Meiryo", system-ui, sans-serif;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.02em;
}

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 28px; }
.section { padding: 130px 0; }
.green { color: var(--green); }

/* ---------- logo ---------- */
.logo { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); }
.mark { height: 50px; width: auto; flex-shrink: 0; object-fit: contain; display: block; }
/* ロゴは白一色のPNG。暗い背景では白のまま、明るい背景では反転して黒く見せる */
.logo-text { font-weight: 800; font-size: 18px; letter-spacing: 0.06em; }

/* ---------- header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(244,243,238,0.0);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease;
}
.site-header.scrolled { background: rgba(244,243,238,0.92); border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.gnav { display: flex; gap: 34px; margin-left: auto; margin-right: 28px; }
.gnav a { text-decoration: none; font-size: 13px; font-weight: 700; letter-spacing: 0.12em; transition: color .2s; }
.btn-nav {
  font-size: 12px; font-weight: 700; letter-spacing: 0.12em;
  padding: 11px 22px; border-radius: 100px; text-decoration: none; transition: background .2s, color .2s;
}
.hamburger { display: none; background: none; border: 0; flex-direction: column; gap: 6px; cursor: pointer; }
.hamburger span { width: 26px; height: 2px; display: block; }

/* --- 最上部（黒いヒーロー上）は白系、スクロール後（白背景）は黒系に切り替え --- */
/* 最上部：白ロゴはそのまま */
.site-header .logo { color: #f4f3ee; }
.site-header .mark { filter: none; }
.site-header .gnav a { color: rgba(244,243,238,0.82); }
.site-header .gnav a:hover { color: var(--green); }
.site-header .btn-nav { background: var(--green); color: var(--ink); }
.site-header .btn-nav:hover { background: #fff; }
.site-header .hamburger span { background: #f4f3ee; }
/* スクロール後：白背景なので白ロゴを反転して黒く見せる */
.site-header.scrolled .logo { color: var(--ink); }
.site-header.scrolled .mark { filter: invert(1); }
.site-header.scrolled .gnav a { color: var(--ink); }
.site-header.scrolled .gnav a:hover { color: var(--accent); }
.site-header.scrolled .btn-nav { background: var(--ink); color: var(--bg); }
.site-header.scrolled .btn-nav:hover { background: var(--accent); }
.site-header.scrolled .hamburger span { background: var(--ink); }

/* --- スマホ用ドロップダウンメニュー（ハンバーガーで開閉） --- */
.mobile-menu { display: none; }
.hamburger span { transition: transform .25s ease; }
/* メニューを開いた時：ヘッダーを白くし、ロゴ・☰を黒に */
.site-header.open { background: rgba(244,243,238,0.98); border-bottom-color: var(--line); }
.site-header.open .logo { color: var(--ink); }
.site-header.open .mark { filter: invert(1); }
.site-header.open .hamburger span { background: var(--ink); }
.site-header.open .hamburger span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.site-header.open .hamburger span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
@media (max-width: 860px) {
  .mobile-menu {
    display: flex; flex-direction: column;
    position: fixed; top: 76px; left: 0; right: 0; z-index: 99;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 6px 28px 22px;
    opacity: 0; transform: translateY(-10px); pointer-events: none;
    transition: opacity .25s ease, transform .25s ease;
  }
  .site-header.open .mobile-menu { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .mobile-menu a {
    color: var(--ink); text-decoration: none; font-weight: 800;
    letter-spacing: 0.12em; font-size: 15px; padding: 17px 4px;
    border-bottom: 1px solid var(--line);
  }
  .mobile-menu a:last-child { border-bottom: 0; }
  .mobile-menu .mm-cta { color: var(--accent); }
}

/* フッターは明るい背景なので、ロゴを反転して黒く見せる */
.footer-brand .mark { filter: invert(1); }

/* ---------- buttons ---------- */
.btn-primary {
  display: inline-block; background: var(--green); color: var(--ink);
  font-weight: 800; font-size: 14px; letter-spacing: 0.06em;
  padding: 15px 38px; border-radius: 100px; text-decoration: none;
  transition: transform .2s, box-shadow .2s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(31,209,102,0.35); }
.btn-ghost {
  display: inline-block; color: currentColor; font-weight: 700; font-size: 14px; letter-spacing: 0.06em;
  padding: 15px 32px; border: 1px solid currentColor; border-radius: 100px; text-decoration: none; transition: opacity .2s;
}
.btn-ghost:hover { opacity: 0.6; }

/* ---------- hero ---------- */
.hero { background: var(--dark); color: #f4f3ee; padding: 220px 0 140px; }
.hero-lead { font-size: 22px; color: var(--green); font-weight: 800; margin-bottom: 30px; letter-spacing: 0.1em; }
.hero-title { font-size: clamp(52px, 10vw, 150px); font-weight: 800; line-height: 1.02; letter-spacing: 0.01em; }
.hero-sub { margin-top: 40px; font-size: 17px; color: rgba(255,255,255,0.72); max-width: 760px; }
.hero-sub .nobr { white-space: nowrap; }
.hero-actions { margin-top: 48px; display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- about ---------- */
.sec-label { display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 0.18em; color: var(--accent); margin-bottom: 34px; }
.sec-label.light { color: var(--green); }
.big-statement { font-size: clamp(40px, 6.4vw, 96px); font-weight: 800; line-height: 1.1; margin-bottom: 44px; }
.about-text { max-width: 720px; font-size: 18px; color: #4a4842; }
.about-text strong { color: var(--ink); border-bottom: 3px solid var(--green); }

/* ---------- service ---------- */
.sec-title { font-size: clamp(30px, 4vw, 54px); font-weight: 800; line-height: 1.18; margin-bottom: 66px; }
.sec-title.light { color: #f4f3ee; }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 40px 36px; transition: transform .25s, box-shadow .25s; }
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(20,19,15,0.08); }
.card-no { display: inline-block; font-size: 28px; font-weight: 800; letter-spacing: 0.06em; color: var(--green); margin-bottom: 18px; }
.card h3 { font-size: 24px; font-weight: 800; margin-bottom: 14px; }
.card p { font-size: 15px; color: #5c5a52; }
.card em { display: block; margin-top: 10px; font-style: normal; font-size: 13px; color: var(--accent); font-weight: 700; }

/* くるトリ（新サービス）マスコット：左（「開始予定」の隣）で待機しプルプル。クリックで一回転して少し進む */
.card.has-mascot { position: relative; overflow: hidden; }

/* 転がりコンテナ：横移動＆回転を担当（startは左＝開始予定の隣） */
.mascot-roll {
  position: absolute; right: 255px; bottom: 30px;
  width: 46px; line-height: 0; cursor: pointer;
  transform-origin: 50% 50%;
  transition: transform 1.4s cubic-bezier(.33,.06,.2,1);
  -webkit-tap-highlight-color: transparent;
}
/* 画像：待機中だけプルプル震える */
.card-mascot {
  width: 46px; height: auto; display: block;
  transform-origin: 50% 62%;
  animation: kuru-tremble .32s ease-in-out infinite;
}
.mascot-roll.rolling .card-mascot { animation: none; }

@keyframes kuru-tremble {
  0%, 100% { transform: rotate(-2.6deg); }
  50%      { transform: rotate(2.6deg); }
}
@media (prefers-reduced-motion: reduce) {
  .card-mascot { animation: none; }
  .mascot-roll { transition: none; }
}
@media (max-width: 860px) {
  /* スマホでは本文の下に余白を作り、その中でくるトリを転がす（テキストに重ねない） */
  .card.has-mascot { padding-bottom: 84px; }
  .mascot-roll { right: 188px; bottom: 16px; }
}

.taglist-label { margin-top: 80px; font-size: 13px; font-weight: 800; letter-spacing: 0.12em; color: var(--muted); }
.taglist { list-style: none; display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.taglist li { font-size: 14px; font-weight: 700; padding: 9px 18px; background: #fff; border: 1px solid var(--line); border-radius: 100px; }

/* ---------- strength（黒背景の反転ブロック） ---------- */
.strength { background: var(--dark); color: #f4f3ee; }
.strength-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.strength-item { border-top: 2px solid var(--green); padding-top: 26px; }
.strength-no { display: block; font-size: clamp(28px, 3vw, 38px); font-weight: 800; line-height: 1.1; margin-bottom: 18px; }
.strength-no small { display: block; font-size: 15px; font-weight: 700; color: var(--green); letter-spacing: 0.06em; margin-top: 4px; }
.strength-item p { font-size: 15px; color: rgba(255,255,255,0.74); }
.muted-note { display: block; margin-top: 8px; font-size: 13px; color: rgba(255,255,255,0.45); }

/* ---------- company ---------- */
.company-table { border-top: 1px solid var(--line); max-width: 820px; }
.company-table > div { display: grid; grid-template-columns: 160px 1fr; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.company-table dt { font-size: 14px; font-weight: 800; color: var(--muted); letter-spacing: 0.08em; }
.company-table dd { font-size: 16px; }

/* ---------- footer ---------- */
.site-footer { background: var(--bg); border-top: 1px solid var(--line); padding: 0 0 40px; }
.footer-cta { text-align: center; padding: 110px 28px 90px; }
.footer-cta h2 { font-size: clamp(32px, 5vw, 64px); font-weight: 800; line-height: 1.12; margin-bottom: 40px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 40px; padding-top: 60px; border-top: 1px solid var(--line); }
.footer-brand .logo-text { font-size: 20px; }
.footer-brand p { color: var(--muted); margin-top: 14px; font-size: 14px; }
.footer-nav { display: flex; flex-direction: column; gap: 14px; }
.footer-nav a { color: var(--ink); text-decoration: none; font-size: 13px; font-weight: 700; letter-spacing: 0.1em; }
.footer-nav a:hover { color: var(--accent); }
.footer-bottom { margin-top: 50px; }
.footer-bottom small { color: var(--muted); font-size: 12px; }

/* ---------- scroll reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(34px); transition: opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1); will-change: opacity, transform; }
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .section { padding: 88px 0; }
  .gnav, .btn-nav { display: none; }
  .hamburger { display: flex; }
  .hero { padding: 150px 0 90px; }
  .hero-sub { font-size: 16px; }
  .hero-sub .nobr { white-space: normal; }
  .cards { grid-template-columns: 1fr; gap: 18px; }
  .strength-grid { grid-template-columns: 1fr; gap: 34px; }
  .company-table > div { grid-template-columns: 1fr; gap: 4px; padding: 18px 0; }
  /* 企業理念の大見出し：サイズは揃え、2行目は折り返さず1行に収めるだけ */
  .big-statement { font-size: 35px; }
  .big-statement br { display: none; }
  .big-statement .bs1, .big-statement .bs2 { display: block; line-height: 1.14; }
  .big-statement .bs2 { white-space: nowrap; }
}

/* 画面には出さず、検索と読み上げにだけ社名を渡す（h1 に社名・2026-09-26 第0段） */
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}