/* ── GOOGLE FONTS ── */
/* Import in each HTML file:
   <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;600;700&family=Noto+Sans+JP:wght@300;400;500&family=DM+Serif+Display:ital@0;1&display=swap" rel="stylesheet" />
*/

/* ── CSS VARIABLES ── */
:root {
  --ink: #0f0e0c;
  --paper: #f5f2ec;
  --cream: #ede9df;
  --rust: #b84c2b;
  --rust-light: #d9603a;
  --steel: #3a4a5c;
  --steel-light: #4e6278;
  --muted: #7a7367;
  --line: rgba(15,14,12,0.12);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-weight: 300;
  line-height: 1.8;
  overflow-x: hidden;
}

/* ── HEADER ── */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.2rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(245,242,236,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.logo {
  font-family: 'DM Serif Display', serif;
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  color: var(--ink);
  text-decoration: none;
}
.logo span { color: var(--rust); }

nav a {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  margin-left: 2rem;
  transition: color 0.2s;
}
nav a:hover,
nav a.active { color: var(--rust); }

/* ── SECTION COMMON ── */
section { padding: 6rem 0; }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rust);
  opacity: 0.3;
  max-width: 60px;
}

.section-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.6rem, 2.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.section-lead {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 2;
  max-width: 580px;
}

/* ── CTA BUTTONS ── */
.cta-btn, .cta-primary {
  display: inline-block;
  background: var(--rust);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 1rem 2.5rem;
  transition: background 0.2s, transform 0.15s;
  width: fit-content;
}
.cta-btn:hover, .cta-primary:hover {
  background: var(--rust-light);
  transform: translateY(-1px);
}
.cta-primary { padding: 1.1rem 3rem; }

.cta-outline {
  display: inline-block;
  border: 1px solid var(--rust);
  color: var(--rust);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.95rem 2.5rem;
  transition: background 0.2s, color 0.2s;
}
.cta-outline:hover {
  background: var(--rust);
  color: #fff;
}

/* ── PAGE HERO (inner pages) ── */
.page-hero {
  padding-top: 72px;
  background: var(--steel);
  padding-bottom: 5rem;
}
.page-hero .container { padding-top: 5rem; }
.page-hero .section-label { color: var(--rust-light); }
.page-hero .section-label::after { background: var(--rust-light); }
.page-hero .section-title { color: #fff; }
.page-hero .section-lead { color: rgba(255,255,255,0.6); }

/* ── FOOTER ── */
footer {
  background: var(--ink);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: 'DM Serif Display', serif;
  color: rgba(255,255,255,0.5);
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-decoration: none;
}

.footer-nav {
  display: flex;
  gap: 2rem;
}
.footer-nav a {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-nav a:hover { color: rgba(255,255,255,0.7); }

.footer-copy {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.25);
  letter-spacing: 0.05em;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  header { padding: 1rem 1.5rem; }
  nav { display: none; }
  footer {
    flex-direction: column;
    gap: 1.2rem;
    text-align: center;
    padding: 2rem 1.5rem;
  }
  .footer-nav { display: none; }
  section { padding: 4rem 0; }
  .container { padding: 0 1.5rem; }
}