/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif; color: #1B2A4A; background: #fff; line-height: 1.6; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ===== VARIABLES ===== */
:root {
  --navy:      #1B2A4A;
  --navy-mid:  #243558;
  --navy-dark: #0F1C33;
  --white:     #ffffff;
  --bg:        #F7F8FA;
  --bg2:       #EEF1F6;
  --text:      #1B2A4A;
  --text-sub:  #6B7A9A;
  --border:    #DDE2ED;
  --gold:      #C4A25A;
  --max-w:     1100px;
}

/* ===== HEADER ===== */
header {
  position: sticky; top: 0; z-index: 100;
  background: var(--navy); border-bottom: 1px solid rgba(255,255,255,.08);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 32px; height: 64px;
}

/* Logo */
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 36px; height: 36px; background: #fff; border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 900; color: var(--navy); letter-spacing: -1px;
  font-family: Georgia, serif; line-height: 1;
}
.logo-text { line-height: 1.15; }
.logo-text .en {
  font-size: 13px; font-weight: 800; color: #fff; letter-spacing: .04em;
}
.logo-text .ja { font-size: 10px; color: rgba(255,255,255,.6); letter-spacing: .05em; }

/* Nav */
header nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
header nav a {
  font-size: 12.5px; font-weight: 600; color: rgba(255,255,255,.8);
  padding: 6px 12px; border-radius: 4px;
  transition: color .2s, background .2s; white-space: nowrap;
}
header nav a:hover, header nav a.active { color: #fff; background: rgba(255,255,255,.1); }

/* Reserve button */
.btn-reserve {
  display: inline-flex; flex-direction: column; align-items: center;
  background: var(--gold); color: #fff; border-radius: 4px;
  padding: 6px 16px; font-size: 12px; font-weight: 800;
  white-space: nowrap; line-height: 1.3; transition: background .2s; flex-shrink: 0;
}
.btn-reserve .sub { font-size: 9px; font-weight: 400; opacity: .85; }
.btn-reserve:hover { background: #b89048; }

/* Hamburger (mobile) */
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span { width: 22px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }

/* ===== PAGE HERO (sub pages) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  padding: 48px 24px 44px;
}
.page-hero-inner { max-width: var(--max-w); margin: 0 auto; }
.breadcrumb {
  font-size: 12px; color: rgba(255,255,255,.5);
  display: flex; align-items: center; gap: 6px; margin-bottom: 12px;
}
.breadcrumb a { color: rgba(255,255,255,.5); }
.breadcrumb a:hover { color: #fff; }
.page-hero h1 { font-size: 28px; font-weight: 900; color: #fff; letter-spacing: .04em; }

/* ===== SECTION LABELS ===== */
.section-label {
  font-size: 11px; font-weight: 700; letter-spacing: .15em;
  color: var(--gold); text-transform: uppercase; margin-bottom: 8px;
}
.section-title {
  font-size: 26px; font-weight: 900; color: var(--navy);
  margin-bottom: 8px; letter-spacing: .02em;
}
.section-sub {
  font-size: 14px; color: var(--text-sub); margin-bottom: 48px; line-height: 1.8;
}

/* ===== BUTTONS ===== */
.btn-navy {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--navy); color: #fff; border-radius: 4px;
  padding: 14px 32px; font-size: 14px; font-weight: 700;
  transition: background .2s; white-space: nowrap;
}
.btn-navy:hover { background: var(--navy-dark); }
.btn-navy-outline {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--navy);
  border: 2px solid var(--navy); border-radius: 4px;
  padding: 12px 28px; font-size: 14px; font-weight: 700;
  transition: all .2s; white-space: nowrap;
}
.btn-navy-outline:hover { background: var(--navy); color: #fff; }
.btn-gold {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--gold); color: #fff; border-radius: 4px;
  padding: 14px 32px; font-size: 14px; font-weight: 700;
  transition: background .2s; white-space: nowrap;
}
.btn-gold:hover { background: #b89048; }
.btn-white {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; color: var(--navy); border-radius: 4px;
  padding: 14px 32px; font-size: 14px; font-weight: 700;
  transition: background .2s; white-space: nowrap;
}
.btn-white:hover { background: var(--bg2); }

/* ===== FOOTER ===== */
footer { background: var(--navy-dark); color: rgba(255,255,255,.7); }
.footer-top {
  max-width: var(--max-w); margin: 0 auto; padding: 56px 24px 40px;
  display: grid; grid-template-columns: 260px 1fr; gap: 48px;
}
.footer-brand .logo-mark { width: 40px; height: 40px; font-size: 22px; }
.footer-brand .logo-text .en { font-size: 15px; }
.footer-brand .logo-text .ja { font-size: 11px; }
.footer-desc { font-size: 13px; line-height: 1.8; margin-top: 16px; color: rgba(255,255,255,.5); }
.footer-nav-group { display: flex; gap: 64px; }
.footer-nav-col h4 {
  font-size: 11px; font-weight: 700; letter-spacing: .12em;
  color: rgba(255,255,255,.4); text-transform: uppercase; margin-bottom: 16px;
}
.footer-nav-col a {
  display: block; font-size: 13px; color: rgba(255,255,255,.6);
  padding: 4px 0; transition: color .2s;
}
.footer-nav-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 24px; text-align: center;
  font-size: 12px; color: rgba(255,255,255,.3);
}

/* ===== MOBILE NAV ===== */
.mobile-nav {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: var(--navy); flex-direction: column;
  padding: 80px 32px 40px; gap: 0;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  font-size: 18px; font-weight: 700; color: rgba(255,255,255,.85);
  padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.08);
  transition: color .2s;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { color: #fff; }
.mobile-nav-close {
  position: absolute; top: 20px; right: 24px;
  color: #fff; font-size: 28px; line-height: 1; cursor: pointer;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  header nav, .btn-reserve { display: none; }
  .hamburger { display: flex; margin-left: auto; }
}
@media (max-width: 700px) {
  .section-title { font-size: 20px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-nav-group { flex-wrap: wrap; gap: 32px; }
}