/* ====================================================================
   8grp Corporate — common stylesheet
   tokens / typography / header / footer / buttons / utilities
   ==================================================================== */
:root {
  --c-primary:    #0A2540;
  --c-primary-2:  #14315C;
  --c-primary-3:  #061829;
  --c-accent:     #2E6BE6;
  --c-accent-2:   #5DA0FF;
  --c-base:       #FFFFFF;
  --c-sub-base:   #F7F8FB;
  --c-text:       #0E1B2C;
  --c-text-sub:   #5A6478;
  --c-text-on-dark: #B8C5DA;
  --c-line:       #E4E8F0;
  --c-line-soft:  #F2F4F8;

  --f-jp: 'Noto Sans JP','Hiragino Sans','Yu Gothic',sans-serif;
  --f-en: 'Inter','Helvetica Neue',Helvetica,Arial,sans-serif;

  --fs-eyebrow: 11px;
  --fs-body: 15px;
  --fs-body-lg: 16px;
  --fs-h4: clamp(18px, 1.6vw, 22px);
  --fs-h3: clamp(22px, 2vw, 28px);
  --fs-h2: clamp(30px, 3.4vw, 48px);
  --fs-h1: clamp(40px, 6vw, 88px);

  --pad-x: clamp(20px, 5vw, 80px);
  --section-y: clamp(80px, 12vw, 160px);

  --ease: cubic-bezier(.2,.7,.3,1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--f-jp);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "palt" 1;
}
.en, .num { font-family: var(--f-en); letter-spacing: 0; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; font-size: inherit; cursor: pointer; }
::selection { background: #C8DBFA; color: var(--c-text); }

/* ====== Header ====== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px var(--pad-x);
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--c-line); }
.brand { display: flex; align-items: baseline; gap: 10px; letter-spacing: 0.02em; }
.brand-mark { font-family: var(--f-en); font-weight: 300; font-size: 22px; letter-spacing: 0.04em; color: var(--c-primary); }
.brand-jp { font-size: 11px; color: var(--c-text-sub); letter-spacing: 0.18em; }

.nav-main { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 36px); }
.nav-main a { font-size: 13px; color: var(--c-text); letter-spacing: 0.04em; position: relative; padding: 6px 0; }
.nav-main a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px; background: var(--c-accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav-main a:hover::after { transform: scaleX(1); }
.nav-main a.nav-cta::after { display: none; }
.nav-main a.nav-cta {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 10px 18px 10px 20px; margin-left: 8px;
  border: 1px solid var(--c-primary); border-radius: 999px;
  font-size: 13px; letter-spacing: 0.04em; color: var(--c-primary); background: transparent;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.nav-main a.nav-cta .arrow {
  display: inline-flex; width: 22px; height: 22px;
  align-items: center; justify-content: center;
  border-radius: 50%; background: var(--c-accent); color: #fff;
  font-size: 12px; transition: transform .25s var(--ease);
}
.nav-main a.nav-cta:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.nav-main a.nav-cta:hover .arrow { transform: translateY(2px); }

/* ===== Buttons ===== */
.btn-cta {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; background: var(--c-primary); color: #fff;
  font-size: 13px; letter-spacing: 0.04em; border: none; border-radius: 999px;
  transition: background .25s var(--ease), transform .25s var(--ease);
}
.btn-cta:hover { background: var(--c-primary-2); transform: translateY(-1px); }
.btn-cta .arrow {
  display: inline-flex; width: 22px; height: 22px;
  align-items: center; justify-content: center;
  border-radius: 50%; background: var(--c-accent); color: #fff;
  font-size: 12px; transition: transform .25s var(--ease);
}
.btn-cta:hover .arrow { transform: translateX(2px); }
.btn-cta .arrow.down { transition: transform .25s var(--ease); }
.btn-cta:hover .arrow.down { transform: translateY(2px); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; background: transparent; color: var(--c-primary);
  font-size: 13px; letter-spacing: 0.04em;
  border: 1px solid var(--c-primary); border-radius: 999px;
  transition: background .25s var(--ease), color .25s var(--ease);
}
.btn-ghost:hover { background: var(--c-primary); color: #fff; }
.btn-ghost .arrow {
  display: inline-flex; width: 22px; height: 22px;
  align-items: center; justify-content: center;
  border-radius: 50%; background: var(--c-accent); color: #fff;
  font-size: 12px; transition: transform .25s var(--ease);
}
.btn-ghost:hover .arrow { transform: translateX(2px); }

.btn-text {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--c-accent); font-size: 13px; letter-spacing: 0.04em;
  padding: 4px 0; border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease);
}
.btn-text:hover { border-bottom-color: var(--c-accent); }

.menu-toggle { display: none; background: none; border: none; padding: 8px; }
.menu-toggle span { display: block; width: 22px; height: 1px; background: var(--c-text); margin: 5px 0; transition: transform .3s var(--ease); }

@media (max-width: 900px) {
  .nav-main {
    display: none; flex-direction: column; gap: 22px;
    position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
    background: #fff; padding: 32px var(--pad-x); align-items: stretch;
    border-top: 1px solid var(--c-line);
  }
  .nav-main.open { display: flex; }
  .nav-main a { font-size: 16px; }
  .nav-main a.nav-cta { margin-left: 0; align-self: flex-start; }
  .menu-toggle { display: block; }
  .menu-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .menu-toggle.open span:nth-child(2) { transform: translateY(-6px) rotate(-45deg); }
}

/* ====== Section primitives ====== */
section { position: relative; }
.section { padding: var(--section-y) var(--pad-x); }
.section.alt { background: var(--c-sub-base); }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 11px; letter-spacing: 0.22em; color: var(--c-accent);
  text-transform: uppercase; margin-bottom: 24px;
}
.section-eyebrow::before { content: ""; display: block; width: 24px; height: 1px; background: currentColor; }
.section-title {
  font-size: var(--fs-h2); font-weight: 300; letter-spacing: 0.02em;
  line-height: 1.3; margin: 0 0 24px; max-width: 22ch; text-wrap: balance;
  color: var(--c-primary);
}
.section-lede { font-size: var(--fs-body-lg); color: var(--c-text-sub); line-height: 2; max-width: 56ch; margin: 0; }

/* ====== Page Hero (sub pages) ====== */
.page-hero {
  position: relative;
  padding: 180px var(--pad-x) 100px;
  background: var(--c-base);
  overflow: hidden;
  border-bottom: 1px solid var(--c-line);
}
.page-hero::before {
  content: ""; position: absolute; right: -120px; top: 60px;
  width: 480px; height: 480px;
  background: radial-gradient(circle, #DCE5F5 0%, transparent 70%);
  filter: blur(80px); opacity: .55; pointer-events: none;
}
.page-hero .eyebrow {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: 11px; letter-spacing: 0.22em; color: var(--c-text-sub);
  text-transform: uppercase; position: relative; z-index: 1;
}
.page-hero .eyebrow::before { content: ""; display: block; width: 32px; height: 1px; background: var(--c-text-sub); }
.page-hero h1 {
  position: relative; z-index: 1;
  font-size: var(--fs-h1); font-weight: 300; line-height: 1.18;
  letter-spacing: 0.02em; margin: 24px 0 0; max-width: 20ch; text-wrap: balance;
  color: var(--c-primary);
}
.page-hero h1 .accent { color: var(--c-accent); font-weight: 400; }
.page-hero .lead {
  position: relative; z-index: 1;
  margin-top: 28px; max-width: 580px;
  color: var(--c-text-sub); line-height: 2; font-size: var(--fs-body-lg);
}
.page-hero .breadcrumb {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 10px;
  font-family: var(--f-en); font-size: 11px; letter-spacing: 0.18em;
  color: var(--c-text-sub); text-transform: uppercase;
  margin-bottom: 20px;
}
.page-hero .breadcrumb a:hover { color: var(--c-accent); }
.page-hero .breadcrumb .sep { color: var(--c-line); }

/* ====== Final CTA (dark) ====== */
.final-cta {
  background: var(--c-primary);
  color: #fff;
  padding: var(--section-y) var(--pad-x);
  position: relative; overflow: hidden;
}
.final-cta::before {
  content: ""; position: absolute; inset: 10% 15%;
  background: radial-gradient(ellipse at center, rgba(93,160,255,0.18), transparent 70%);
  filter: blur(80px); pointer-events: none;
}
.final-cta-head { position: relative; z-index: 1; max-width: 720px; margin: 0 auto 64px; text-align: center; }
.final-cta-head .section-eyebrow { color: var(--c-accent-2); }
.final-cta-head h2 {
  font-size: var(--fs-h2); font-weight: 300;
  letter-spacing: 0.02em; line-height: 1.3;
  margin: 0; color: #fff; text-wrap: balance;
}
.final-cta-head p {
  margin: 24px 0 0; color: var(--c-text-on-dark);
  line-height: 2; font-size: var(--fs-body-lg);
}
.cta-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 1280px; margin: 0 auto;
}
@media (max-width: 900px) { .cta-grid { grid-template-columns: 1fr; } }
.cta-card {
  background: var(--c-primary-2);
  border-radius: 12px;
  padding: 36px 32px 32px;
  display: flex; flex-direction: column; gap: 18px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.cta-card:hover { transform: translateY(-3px); border-color: var(--c-accent-2); background: #1A3D6E; }
.cta-card .cta-en { font-family: var(--f-en); font-size: 11px; letter-spacing: 0.22em; color: var(--c-accent-2); font-weight: 500; text-transform: uppercase; }
.cta-card h3 { margin: 0; font-size: 22px; font-weight: 400; letter-spacing: 0.02em; color: #fff; line-height: 1.5; }
.cta-card p { margin: 0; font-size: 14px; color: var(--c-text-on-dark); line-height: 1.9; }
.cta-card .btn-row {
  margin-top: auto; padding-top: 16px;
  display: inline-flex; align-items: center; gap: 12px;
  color: #fff; font-size: 13px; letter-spacing: 0.06em;
}
.cta-card .btn-row .arrow {
  display: inline-flex; width: 28px; height: 28px;
  align-items: center; justify-content: center;
  border-radius: 50%; background: var(--c-accent); color: #fff;
  transition: transform .25s var(--ease), background .25s var(--ease);
}
.cta-card:hover .btn-row .arrow { transform: translateX(3px); background: var(--c-accent-2); color: var(--c-primary); }
.cta-card .cta-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: rgba(93,160,255,0.12); border: 1px solid rgba(93,160,255,0.22);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 4px;
  transition: background .35s var(--ease), border-color .35s var(--ease), transform .35s var(--ease);
}
.cta-card .cta-icon .material-icons-outlined,
.cta-card .cta-icon .material-icons {
  font-size: 28px; color: var(--c-accent-2); line-height: 1;
}
.cta-card:hover .cta-icon { background: var(--c-accent-2); border-color: var(--c-accent-2); transform: translateY(-2px); }
.cta-card:hover .cta-icon .material-icons-outlined,
.cta-card:hover .cta-icon .material-icons { color: var(--c-primary); }

/* ====== Footer ====== */
.site-footer {
  background: var(--c-primary-3);
  color: var(--c-text-on-dark);
  padding: 80px var(--pad-x) 36px;
}
.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px; padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
@media (max-width: 900px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer-top { grid-template-columns: 1fr; } }
.footer-brand .brand-mark { color: #fff; }
.footer-brand .brand-jp { color: var(--c-text-on-dark); display: block; margin-top: 8px; }
.footer-brand .desc { color: var(--c-text-on-dark); margin: 22px 0 0; line-height: 1.9; font-size: 13px; max-width: 38ch; }
.footer-locations { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 16px 32px; }
.footer-locations .loc { font-size: 12px; line-height: 1.6; }
.footer-locations .loc .en {
  display: block; font-family: var(--f-en);
  font-size: 10px; letter-spacing: 0.2em;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase; margin-bottom: 2px;
}
.footer-col h5 {
  font-family: var(--f-en); font-size: 11px; letter-spacing: 0.22em;
  color: rgba(255,255,255,0.5); text-transform: uppercase;
  margin: 0 0 18px; font-weight: 500;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.footer-col a { font-size: 13px; color: var(--c-text-on-dark); transition: color .25s var(--ease); }
.footer-col a:hover { color: var(--c-accent-2); }
.footer-meta {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px; font-size: 11px; letter-spacing: 0.12em;
  color: rgba(255,255,255,0.4); text-transform: uppercase;
  flex-wrap: wrap; gap: 16px; font-family: var(--f-en);
}
.footer-meta a { color: rgba(255,255,255,0.5); }
.footer-meta a:hover { color: var(--c-accent-2); }

/* ====== Reveal ====== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ====== Brand badges ====== */
.brand-badge {
  display: inline-flex; align-items: center; align-self: flex-start;
  padding: 5px 12px; border-radius: 999px;
  font-family: var(--f-en); font-size: 10px; letter-spacing: 0.2em;
  font-weight: 500; text-transform: uppercase;
}
.brand-badge.education { background: #E1F5EE; color: #0F6E56; }
.brand-badge.hr        { background: #EEEDFE; color: #3C3489; }
.brand-badge.space     { background: #FAEEDA; color: #854F0B; }
.brand-badge.tech      { background: #DCE9FF; color: #0A2540; }

/* ====== Forms (shared) ====== */
.form-wrap {
  margin-top: 0; max-width: 760px; margin-left: auto; margin-right: auto;
  background: #fff; border: 1px solid var(--c-line); border-radius: 12px;
  padding: clamp(28px, 4vw, 48px);
}
.form-eyebrow { font-size: 11px; letter-spacing: 0.22em; color: var(--c-accent); text-transform: uppercase; margin-bottom: 12px; font-family: var(--f-en); }
.form-title { font-size: clamp(20px, 2.4vw, 26px); font-weight: 400; letter-spacing: 0.02em; margin: 0 0 28px; color: var(--c-primary); }
.form-group { margin-bottom: 22px; }
.form-group label.fl { display: block; font-size: 12px; letter-spacing: 0.12em; color: var(--c-text-sub); margin-bottom: 8px; text-transform: uppercase; font-family: var(--f-en); }
.form-group label.fl .req { color: var(--c-accent); margin-left: 6px; }
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--c-line);
  font-size: 15px; font-family: inherit; color: var(--c-text); background: #fff;
  border-radius: 6px; transition: border-color .25s var(--ease);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--c-accent); }
.form-group textarea { resize: vertical; min-height: 100px; line-height: 1.7; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-label {
  display: inline-flex; align-items: center; padding: 9px 14px;
  border: 1px solid var(--c-line); font-size: 13px; color: var(--c-text);
  cursor: pointer; user-select: none; transition: border-color .2s, color .2s, background .2s;
  border-radius: 999px;
}
.chip-label:hover { border-color: var(--c-text-sub); }
.chip-label input { display: none; }
.chip-label:has(input:checked) { border-color: var(--c-accent); color: var(--c-accent); background: rgba(46,107,230,0.06); }
.consent { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--c-text-sub); margin-top: 4px; }
.consent input { margin-top: 4px; }
.form-submit-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-top: 8px; }
.form-message { font-size: 13px; }
.form-message.ok { color: var(--c-accent); }
.form-message.err { color: #C24545; }
.form-loading { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--c-line); border-top-color: var(--c-accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ====== FAQ ====== */
.faq-list { margin-top: 56px; border-top: 1px solid var(--c-line); max-width: 920px; margin-left: auto; margin-right: auto; }
.faq-item { border-bottom: 1px solid var(--c-line); }
.faq-q {
  width: 100%; text-align: left; background: none; border: none;
  padding: 28px 0; display: flex; justify-content: space-between; align-items: center; gap: 24px;
  font-size: var(--fs-body-lg); color: var(--c-text); letter-spacing: 0.02em;
  font-family: inherit; font-weight: 500;
}
.faq-q .q-mark { font-family: var(--f-en); color: var(--c-accent); font-weight: 400; margin-right: 16px; font-size: 14px; letter-spacing: 0.1em; }
.faq-q .toggle {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  border: 1px solid var(--c-line); display: grid; place-items: center; color: var(--c-accent);
  transition: transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
}
.faq-item.open .toggle { transform: rotate(45deg); border-color: var(--c-accent); background: var(--c-accent); color: #fff; }
.faq-q-text { flex: 1; display: flex; align-items: center; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s var(--ease); }
.faq-item.open .faq-a { max-height: 600px; }
.faq-a-inner { padding: 0 0 28px 50px; color: var(--c-text-sub); line-height: 2; max-width: 64ch; }
@media (max-width: 560px) { .faq-a-inner { padding-left: 0; } }

/* ====== Generic Card list / 2-col head ====== */
.split-head {
  display: flex; align-items: end; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; margin-bottom: 56px;
}