/* ==========================================================================
   BAR Oath - Common Stylesheet
   ========================================================================== */

/* CSS Variables */
:root {
  --color-bg: #0a0a0a;
  --color-bg-soft: #141414;
  --color-bg-light: #1c1c1c;
  --color-gold: #c9a961;
  --color-gold-bright: #d4af37;
  --color-gold-soft: #b8945a;
  --color-text: #f5f1e8;
  --color-text-mute: #a8a292;
  --color-line: rgba(201, 169, 97, 0.25);

  --font-en-serif: "Cormorant Garamond", "Cinzel", "Times New Roman", serif;
  --font-en-display: "Cinzel", "Cormorant Garamond", serif;
  --font-jp-serif: "Noto Serif JP", "游明朝", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --font-jp-sans: "Noto Sans JP", "游ゴシック", "Yu Gothic", sans-serif;

  --max-w: 1200px;
  --max-w-narrow: 960px;

  --header-h: 80px;
  --header-h-sp: 64px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.45, 0, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-jp-serif);
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

a:hover {
  color: var(--color-gold);
}

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
  font-family: inherit;
}

/* Typography */
h1, h2, h3, h4, h5 {
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.08em;
}

.en {
  font-family: var(--font-en-serif);
  letter-spacing: 0.18em;
  font-weight: 300;
}

.en-display {
  font-family: var(--font-en-display);
  letter-spacing: 0.24em;
  font-weight: 400;
  text-transform: uppercase;
}

/* Layout */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

.container-narrow {
  max-width: var(--max-w-narrow);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 120px 0;
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: 64px;
}

.section-title .en-display {
  display: block;
  color: var(--color-gold);
  font-size: 0.875rem;
  margin-bottom: 16px;
}

.section-title .jp {
  font-family: var(--font-jp-serif);
  font-size: 2rem;
  letter-spacing: 0.12em;
}

.section-title .line {
  display: block;
  width: 40px;
  height: 1px;
  background-color: var(--color-gold);
  margin: 24px auto 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px 40px;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-en-serif);
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: var(--color-gold);
  transform: translateX(-100%);
  transition: transform 0.4s var(--ease);
  z-index: -1;
}

.btn:hover {
  color: var(--color-bg);
}

.btn:hover::before {
  transform: translateX(0);
}

.btn-arrow::after {
  content: "→";
  transition: transform 0.3s var(--ease);
}

.btn-arrow:hover::after {
  transform: translateX(4px);
}

.btn-solid {
  background-color: var(--color-gold);
  color: var(--color-bg);
}

.btn-solid::before {
  background-color: var(--color-gold-bright);
}

.btn-solid:hover {
  color: var(--color-bg);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  background-color: rgba(10, 10, 10, 0);
  transition: background-color 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}

.header.is-scrolled {
  background-color: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-logo {
  font-family: var(--font-en-display);
  font-size: 1.5rem;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  font-weight: 400;
  display: flex;
  align-items: center;
}

.header-logo .small {
  font-size: 0.65rem;
  letter-spacing: 0.4em;
  color: var(--color-text-mute);
  display: block;
  margin-top: 2px;
}

.header-logo-img {
  height: 44px;
  width: auto;
  display: block;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.header-nav a {
  font-family: var(--font-en-serif);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text);
  position: relative;
  padding: 4px 0;
}

.header-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-gold);
  transition: width 0.4s var(--ease);
}

.header-nav a:hover {
  color: var(--color-gold);
}

.header-nav a:hover::after,
.header-nav a.is-current::after {
  width: 100%;
}

.header-nav a.is-current {
  color: var(--color-gold);
}

/* Mobile menu button */
.menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
  z-index: 110;
}

.menu-btn span {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 1px;
  background-color: var(--color-gold);
  transition: all 0.4s var(--ease);
}

.menu-btn span:nth-child(1) { top: 14px; }
.menu-btn span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.menu-btn span:nth-child(3) { bottom: 14px; }

.menu-btn.is-open span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.menu-btn.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-btn.is-open span:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* Mobile drawer */
.drawer {
  position: fixed;
  inset: 0;
  background-color: var(--color-bg);
  z-index: 105;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s var(--ease), visibility 0.5s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
}

.drawer.is-open {
  opacity: 1;
  visibility: visible;
}

.drawer-inner {
  text-align: center;
  padding: 40px;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-bottom: 48px;
}

.drawer-nav a {
  font-family: var(--font-en-serif);
  font-size: 1.1rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.drawer-nav a .jp {
  display: block;
  font-family: var(--font-jp-serif);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--color-text-mute);
  margin-top: 6px;
}

.drawer-foot {
  border-top: 1px solid var(--color-line);
  padding-top: 32px;
}

.drawer-foot a {
  display: block;
  font-family: var(--font-en-serif);
  letter-spacing: 0.2em;
  margin-bottom: 12px;
  color: var(--color-gold);
}

/* Footer */
.footer {
  background-color: #050505;
  border-top: 1px solid var(--color-line);
  padding: 80px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand .footer-logo {
  font-family: var(--font-en-display);
  font-size: 1.75rem;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--color-text-mute);
  font-size: 0.9rem;
  line-height: 1.9;
}

.footer-heading {
  font-family: var(--font-en-serif);
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.footer-list li {
  margin-bottom: 10px;
}

.footer-list a,
.footer-info {
  font-size: 0.9rem;
  color: var(--color-text-mute);
}

.footer-info {
  line-height: 1.9;
}

.footer-info strong {
  color: var(--color-text);
  font-weight: 400;
  letter-spacing: 0.08em;
}

.footer-tel {
  display: inline-block;
  font-family: var(--font-en-serif);
  font-size: 1.5rem;
  letter-spacing: 0.12em;
  color: var(--color-gold);
  margin: 8px 0;
}

.footer-sns {
  display: flex;
  gap: 16px;
  margin-top: 16px;
}

.footer-sns a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  color: var(--color-gold);
  transition: all 0.3s var(--ease);
}

.footer-sns a:hover {
  background-color: var(--color-gold);
  color: var(--color-bg);
}
.footer-sns a:has(img) {
  border: none;
  background: transparent;
  padding: 0;
}
.footer-sns a:has(img):hover {
  background: transparent;
  opacity: 0.75;
}
.footer-sns a img {
  width: 40px;
  height: 40px;
  display: block;
  object-fit: contain;
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--color-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--color-text-mute);
  letter-spacing: 0.1em;
}

.footer-bottom .copyright {
  font-family: var(--font-en-serif);
  letter-spacing: 0.18em;
}

/* Page Hero (sub pages) */
.page-hero {
  height: 50vh;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background:
    linear-gradient(135deg, rgba(10, 10, 10, 0.85), rgba(10, 10, 10, 0.95)),
    radial-gradient(ellipse at center, rgba(201, 169, 97, 0.08) 0%, transparent 60%),
    var(--color-bg-soft);
  margin-top: 0;
  padding-top: var(--header-h);
  text-align: center;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(201, 169, 97, 0.02) 20px, rgba(201, 169, 97, 0.02) 21px);
  pointer-events: none;
}

.page-hero-en {
  font-family: var(--font-en-display);
  font-size: 3.5rem;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  margin-bottom: 20px;
  text-transform: uppercase;
}

.page-hero-jp {
  font-family: var(--font-jp-serif);
  font-size: 1rem;
  letter-spacing: 0.3em;
  color: var(--color-text-mute);
}

.page-hero-line {
  width: 1px;
  height: 60px;
  background-color: var(--color-gold);
  margin: 32px auto 0;
}

/* Breadcrumb */
.breadcrumb {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--color-text-mute);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--color-line);
}

.breadcrumb a:hover {
  color: var(--color-gold);
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Lazy load: 画面に入って読み込みが終わったら、ゆっくり浮かび上がる */
.js img[loading="lazy"],
.js iframe[loading="lazy"] {
  opacity: 0;
  transition: opacity 6.6s var(--ease-out), transform 9s var(--ease-out);
}

.js img[loading="lazy"].is-loaded,
.js iframe[loading="lazy"].is-loaded {
  opacity: 1;
}

/* 写真はほんのり拡大した状態から落ち着く */
.js .slider-slide img[loading="lazy"] {
  transform: scale(1.05);
}

.js .slider-slide img[loading="lazy"].is-loaded {
  transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .js img[loading="lazy"],
  .js iframe[loading="lazy"] {
    transition: opacity 0.4s linear;
  }

  .js .slider-slide img[loading="lazy"] {
    transform: none;
  }
}

/* Scroll to Top */
.scroll-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  background-color: rgba(10, 10, 10, 0.9);
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s var(--ease);
}

.scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--color-gold);
  color: var(--color-bg);
}

/* Responsive */
@media (max-width: 960px) {
  .header-nav {
    display: none;
  }
  .menu-btn {
    display: block;
  }
  .header {
    height: var(--header-h-sp);
  }
  .header-inner {
    padding: 0 20px;
  }
  .header-logo {
    font-size: 1.2rem;
    letter-spacing: 0.25em;
  }
  .header-logo-img {
    height: 34px;
  }
  .container,
  .container-narrow {
    padding: 0 20px;
  }
  .section {
    padding: 80px 0;
  }
  .section-title {
    margin-bottom: 48px;
  }
  .section-title .jp {
    font-size: 1.5rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  .page-hero {
    height: 38vh;
    min-height: 280px;
  }
  .page-hero-en {
    font-size: 2.2rem;
    letter-spacing: 0.22em;
  }
  .page-hero-jp {
    font-size: 0.85rem;
    letter-spacing: 0.22em;
  }
  .btn {
    padding: 16px 32px;
    font-size: 0.85rem;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 64px 0;
  }
  .section-title .jp {
    font-size: 1.3rem;
  }
}