/* ===========================================
   全国水族館ガイド Japan - Critical CSS
   Above-the-fold: header / hero / page-hero
   =========================================== */

:root {
  --clr-deep:    #03045E;
  --clr-navy:    #023E8A;
  --clr-main:    #0077B6;
  --clr-sub:     #0096C7;
  --clr-light1:  #00B4D8;
  --clr-light2:  #90E0EF;
  --clr-light3:  #CAF0F8;
  --clr-bg:      #F0F9FF;
  --clr-white:   #FFFFFF;
  --clr-text:    #1B2F4E;
  --clr-muted:   #4A6D8C;
  --font-serif: 'Noto Serif JP', serif;
  --font-sans:  'Noto Sans JP', sans-serif;
  --font-en:    'Montserrat', sans-serif;
  --header-h: 68px;
  --radius-s: 8px;
  --radius-m: 16px;
  --radius-l: 24px;
  --radius-xl: 40px;
  --shadow-card: 0 4px 24px rgba(3, 4, 94, 0.07);
  --shadow-hover: 0 12px 40px rgba(0, 119, 182, 0.18);
  --ease: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
[hidden] { display: none !important; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.75;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  height: var(--header-h);
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: none;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 22px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0;
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--clr-white);
  white-space: nowrap;
  flex-shrink: 0;
}
.site-header .logo-icon { display: none; }
.logo-text { letter-spacing: -0.03em; }
.logo-sub {
  font-family: var(--font-en);
  font-size: 0.8em;
  margin-left: 4px;
  opacity: 0.75;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.main-nav {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 6px;
  margin-left: auto;
  min-width: 0;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1;
  padding: 8px 18px;
  border-radius: var(--radius-xl);
}
.hamburger {
  display: none;
  appearance: none;
  border: 0;
  background: transparent;
  width: 44px;
  height: 44px;
  padding: 0;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  border-radius: 999px;
  background: var(--clr-white);
}

.hero,
.page-hero {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero {
  min-height: 100vh;
  background: linear-gradient(180deg, #00B4D8 0%, #0096C7 18%, #0077B6 42%, #023E8A 65%, #03045E 82%, #010B2A 100%);
}
.hero-bg,
.page-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-bg-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.24;
  mix-blend-mode: luminosity;
}
.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: var(--clr-white);
  padding: calc(var(--header-h) + 32px) 24px 160px;
  max-width: 720px;
  width: 100%;
}
.hero-eyecatch {
  font-family: var(--font-en);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--clr-light2);
  margin: 0 0 20px;
  opacity: 1;
}
.hero-title {
  margin: 0 0 28px;
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 7vw, 4.8rem);
  font-weight: 700;
  line-height: 1.2;
}
.hero-title-en {
  display: block;
  font-family: var(--font-en);
  font-size: 0.52em;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--clr-light2);
  margin-top: 6px;
}
.hero-desc {
  font-size: clamp(0.88rem, 2vw, 1.05rem);
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.9;
  max-width: 43rem;
  margin: 0 auto 40px;
}
.hero-search {
  display: flex;
  width: 100%;
  max-width: 540px;
  margin: 0 auto 36px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.28);
}
.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 15px 22px;
  font-size: 0.95rem;
  color: white;
  min-width: 0;
}
.search-input::placeholder { color: rgba(255, 255, 255, 0.48); }
.search-btn {
  background: var(--clr-main);
  border: none;
  min-width: 58px;
  padding: 15px 20px;
  color: white;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.page-hero {
  min-height: 280px;
  background: linear-gradient(180deg, #010B2A 0%, #023E8A 48%, #0096C7 100%);
}
.page-hero-content {
  position: relative;
  z-index: 10;
  color: var(--clr-white);
  text-align: center;
  padding: var(--header-h) 24px 32px;
  max-width: 960px;
}
.section-label {
  font-family: var(--font-en);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clr-light2);
  margin-bottom: 14px;
}
.page-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.2;
  margin: 0 0 12px;
}
.page-hero-desc {
  color: rgba(255, 255, 255, 0.84);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0;
}

@media (max-width: 960px) {
  .main-nav { display: none; }
  .hamburger { display: block; }
  .hero-content { padding-bottom: 120px; }
}

@media (max-width: 640px) {
  .container,
  .header-inner,
  .hero-content,
  .page-hero-content { padding-left: 16px; padding-right: 16px; }
  .hero-search { flex-direction: column; }
  .search-btn { justify-content: center; }
  .page-hero { min-height: 240px; }
}