/* ============================================
   SotoTecho - Hotel Inspired Common Stylesheet
   Theme: Luxury Ryokan & Boutique Hotel
   ============================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;1,300;1,400;1,500&family=Noto+Sans+JP:wght@200;300;400;500&family=Noto+Serif+JP:wght@200;300;400;500;700&display=swap');

/* --- Design Tokens --- */
:root {
  /* Colors */
  --hotel-bg-light: #FAF9F6;      /* アラバスターホワイト (Aman base) */
  --hotel-bg-sand: #F3F1EB;       /* ソフトサンドベージュ */
  --hotel-bg-dark: #111111;       /* 漆黒 */
  --hotel-text-dark: #181716;     /* 墨黒 */
  --hotel-text-gray: #524F4A;     /* チャコールグレー */
  --hotel-text-dim: #8E8881;      /* 灰ベージュ */
  
  /* Accent Colors */
  --hotel-accent-gold: #B39257;    /* シャンパンゴールド */
  --hotel-accent-navy: #1C2D37;    /* ディープネイビー (Imperial trust) */
  --hotel-border-fine: #E8E5DC;    /* 繊細な境界線 */
  --hotel-border-dark: #333333;    /* ダーク用境界線 */
  
  /* Glassmorphism */
  --hotel-glass-light: rgba(250, 249, 246, 0.9);
  --hotel-glass-dark: rgba(17, 17, 17, 0.9);

  /* Typography */
  --font-serif: 'Noto Serif JP', serif;
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-display: 'Cormorant Garamond', serif;

  /* Layout Spacing (Hotel-spec) */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 5rem;
  --space-2xl: 7.5rem;              /* ゆったりとした間合い */
  --hotel-space-block: 7.5rem;      /* セクション上下余白（PC時） */

  /* Transitions */
  --transition-base: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-slow: 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
  
  --max-width: 1200px;
  --header-height: 80px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--hotel-text-dark);
  background-color: var(--hotel-bg-light);
  line-height: 1.8;
  overflow-x: hidden;
}

/* Base Headings & Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: 0.1em;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-base);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- Common Header (Hotel Style) --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background var(--transition-base), border-color var(--transition-base), height var(--transition-base);
}

/* Dark/Transparent default header */
.site-header--trans {
  background: transparent;
  color: #ffffff;
}

.site-header--trans .site-logo__en {
  color: var(--hotel-accent-gold);
}

.site-header--trans .menu-toggle__bar {
  background: #ffffff;
}

/* Scrolled Header */
.site-header.is-scrolled {
  height: 70px;
  background: var(--hotel-glass-light);
  color: var(--hotel-text-dark);
  border-bottom-color: var(--hotel-border-fine);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-header.is-scrolled.dark-mode {
  background: var(--hotel-glass-dark);
  color: #ffffff;
  border-bottom-color: var(--hotel-border-dark);
}

.site-header.is-scrolled .menu-toggle__bar {
  background: var(--hotel-text-dark);
}
.site-header.is-scrolled.dark-mode .menu-toggle__bar {
  background: #ffffff;
}

.site-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 0 var(--space-lg);
}

.site-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
}

.site-logo__kanji {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  letter-spacing: 0.25em;
  font-weight: 500;
}

.site-logo__en {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--hotel-accent-gold);
  margin-top: 2px;
}

.site-nav__list {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  align-items: center;
}

.site-nav__link {
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  position: relative;
  padding: 5px 0;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--hotel-accent-gold);
  transition: width var(--transition-base);
}

.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  width: 100%;
}

.site-nav__link:hover {
  color: var(--hotel-accent-gold);
}

/* Call to Action Button in Header */
.header-cta {
  display: inline-block;
  border: 1px solid var(--hotel-accent-gold);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  font-family: var(--font-sans);
  background: transparent;
  color: var(--hotel-accent-gold);
  text-transform: uppercase;
  transition: all var(--transition-base);
}

.header-cta:hover {
  background: var(--hotel-accent-gold);
  color: #ffffff !important;
}

/* Mobile Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  z-index: 1100;
}

.menu-toggle__bar {
  display: block;
  width: 26px;
  height: 1px;
  background: var(--hotel-text-dark);
  margin: 6px 0;
  transition: var(--transition-base);
}

/* --- Common Footer --- */
.site-footer {
  background-color: #111111;
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-2xl) 0 var(--space-lg);
  font-size: 0.85rem;
  border-top: 1px solid var(--hotel-border-dark);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.site-footer__logo {
  color: #ffffff;
}

.site-footer__desc {
  font-weight: 200;
  line-height: 2;
  max-width: 340px;
}

.site-footer__links-title {
  color: #ffffff;
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

.site-footer__links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.site-footer__link {
  font-weight: 200;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer__link:hover {
  color: var(--hotel-accent-gold);
}

.site-footer__bottom {
  border-top: 1px solid var(--hotel-border-dark);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.site-footer__copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.3);
}

.site-footer__socials {
  display: flex;
  gap: var(--space-md);
}

/* --- Scroll Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1s cubic-bezier(0.25, 0.8, 0.25, 1), transform 1s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive Layouts --- */
@media (max-width: 992px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --hotel-space-block: 4rem;      /* モバイル時は余白を狭めてタイトに */
    --space-lg: 1.75rem;
    --space-xl: 3.5rem;
    --space-2xl: 5rem;
  }

  .site-header__inner {
    padding: 0 var(--space-md);
  }

  .site-nav__list {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  /* Mobile menu open state */
  .site-nav__list.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--hotel-bg-dark);
    color: #ffffff;
    padding: var(--space-2xl) var(--space-md);
    z-index: 1050;
    animation: fadeIn 0.4s forwards;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
  }

  .site-nav__list.is-open .site-nav__link {
    font-size: 1.2rem;
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}