@import url('https://fonts.googleapis.com/css2?family=PT+Sans:ital,wght@0,400;0,700;1,400&family=Merriweather:ital,wght@0,300;0,400;1,300&family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

:root {
  --bg: #ffffff;
  --bg2: #f8f8f6;
  --bg3: #f0ede8;
  --text: #1a1a1a;
  --text-muted: #666;
  --text-light: #999;
  --accent: #61789E;
  --accent2: #4a5f80;
  --border: #e0ddd8;
  --border-light: #eeece8;
  --nav-h: 60px;
}

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

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ─── NAV ─── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  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(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  display: flex;
  align-items: center;
  transition: opacity 0.2s;
}
.nav-logo img {
  height: 32px;
  width: auto;
  display: block;
}
.nav-logo:hover { opacity: 0.7; }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  font-family: 'PT Sans', sans-serif;
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

/* hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  transition: all 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* mobile menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 24px 40px;
  z-index: 99;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
}
.nav-mobile.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}
.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.nav-mobile ul a {
  font-family: 'PT Sans', sans-serif;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.nav-mobile ul a:hover { color: var(--accent); }

/* ─── FOOTER ─── */
footer {
  margin-top: auto;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-logo {
  font-family: 'PT Sans', sans-serif;
  font-weight: 300;
  font-size: 1.2rem;
  letter-spacing: 0.2em;
  color: var(--text);
}
.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}
.footer-links a {
  font-family: 'PT Sans', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }
.footer-copy {
  font-size: 0.7rem;
  color: var(--text-light);
  width: 100%;
  text-align: right;
}

/* ─── PAGE WRAPPER ─── */
.page-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-top: var(--nav-h);
}

/* ─── SECTION LABEL ─── */
.section-label {
  font-family: 'PT Sans', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.section-title {
  font-family: 'PT Sans', 'Noto Sans JP', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.2;
  color: var(--text);
}

/* ─── SCROLL REVEAL ─── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  nav { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-mobile { display: block; }
  footer { padding: 32px 20px; flex-direction: column; align-items: flex-start; }
  .footer-copy { text-align: left; }
}