@import url('https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@300;400;500;700&family=Noto+Sans+JP:wght@300;400;500&family=DM+Mono:wght@400;500&display=swap');

:root {
  --c-bg:       #FFFFFF;
  --c-bg-soft:  #F7F8FA;
  --c-bg-mid:   #EEF1F5;
  --c-text:     #1A1F2E;
  --c-text-sub: #5A6478;
  --c-text-lt:  #8A94A6;
  --c-gold:     #B8974A;
  --c-gold-lt:  #D4B06A;
  --c-border:   #E2E7EF;
  --c-border-dk:#C8D0DC;

  --f-display: 'Zen Kaku Gothic New', sans-serif;
  --f-sans:    'Noto Sans JP', sans-serif;
  --f-mono:    'DM Mono', monospace;

  --max-w: 1080px;
  --nav-h: 64px;
  --radius: 6px;
  --shadow: 0 2px 16px rgba(26,31,46,0.07);
  --shadow-lg: 0 8px 40px rgba(26,31,46,0.10);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--f-sans);
  font-size: 18px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* NAV */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  z-index: 100;
}
.nav-logo {
  font-family: var(--f-mono);
  font-size: 15px;
  letter-spacing: 0.18em;
  color: var(--c-text);
  font-weight: 500;
}
.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
  align-items: center;
}
.nav-links a {
  font-size: 14px;
  color: var(--c-text-sub);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--c-text); }
.nav-cta {
  background: var(--c-text) !important;
  color: #fff !important;
  padding: 9px 20px;
  border-radius: var(--radius);
  font-size: 13px !important;
}
.nav-cta:hover { opacity: 0.85; }

/* HAMBURGER */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all 0.25s;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* MOBILE MENU */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  padding: 24px 24px 32px;
  z-index: 99;
  flex-direction: column;
  gap: 0;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  color: var(--c-text-sub);
  border-bottom: 1px solid var(--c-border);
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile-cta {
  margin-top: 20px;
  background: var(--c-text);
  color: #fff !important;
  padding: 14px !important;
  border-radius: var(--radius);
  text-align: center;
  font-weight: 500;
  border-bottom: none !important;
}

/* LAYOUT */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}
section { padding: 96px 0; }

/* LABEL */
.label {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 16px;
  display: block;
}

/* HEADINGS */
.section-title {
  font-family: var(--f-display);
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 14px;
}
.section-sub {
  font-size: 16px;
  color: var(--c-text-sub);
  line-height: 1.85;
  max-width: 520px;
}

.divider {
  width: 32px; height: 2px;
  background: var(--c-gold);
  margin: 20px 0;
  border-radius: 2px;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--f-sans);
  font-size: 15px;
  border-radius: var(--radius);
  transition: all 0.2s;
  cursor: pointer;
  font-weight: 500;
}
.btn-primary { background: var(--c-text); color: #fff; border: none; }
.btn-primary:hover { background: #2d3448; }
.btn-outline { background: transparent; color: var(--c-text); border: 1.5px solid var(--c-gold); }
.btn-outline:hover { border-color: var(--c-gold-lt); background: var(--c-bg-soft); }

/* TAG */
.tag {
  font-size: 12px;
  font-family: var(--f-mono);
  color: var(--c-text-sub);
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  padding: 4px 12px;
  border-radius: 99px;
}

/* PAGE HERO */
.page-hero {
  padding: calc(var(--nav-h) + 72px) 0 72px;
  border-bottom: 1px solid var(--c-border);
}
.page-hero h1 {
  font-family: var(--f-display);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}
.page-hero p {
  font-size: 16px;
  color: var(--c-text-sub);
  max-width: 500px;
  line-height: 1.85;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--c-border);
  padding: 48px 0;
  background: var(--c-bg-soft);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-logo { font-family: var(--f-mono); font-size: 14px; letter-spacing: 0.18em; }
.footer-copy { font-size: 12px; color: var(--c-text-lt); font-family: var(--f-mono); }
.footer-links { display: flex; gap: 28px; list-style: none; }
.footer-links a { font-size: 14px; color: var(--c-text-sub); transition: color 0.2s; }
.footer-links a:hover { color: var(--c-text); }

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .container { padding: 0 20px; }
  section { padding: 64px 0; }
  .page-hero { padding: calc(var(--nav-h) + 48px) 0 48px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 16px; }
}