/* ===================================
   Bar Fukuro - Style Sheet
   Mobile-first responsive design
   =================================== */

/* --- Custom Properties --- */
:root {
  --bg-primary: #0d0906;
  --bg-secondary: #1a1208;
  --bg-card: #241a0e;
  --accent: #c8963e;
  --accent-light: #d4a853;
  --accent-dark: #a67a2e;
  --text-primary: #f5f0e8;
  --text-secondary: #b8a99a;
  --text-dim: #8a7d72;
  --border: rgba(200, 150, 62, 0.15);
  --font-serif: 'Noto Serif JP', serif;
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-accent: 'Cormorant Garamond', serif;
  --header-height: 64px;
  --section-padding: 80px;
  --container-max: 1080px;
  --radius: 8px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.8;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

ul {
  list-style: none;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.sp-only {
  display: inline;
}

/* --- Fade-in Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===================================
   Header
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(13, 9, 6, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
  text-decoration: none;
  z-index: 101;
}

.header__logo-icon {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 4px;
}

.header__logo-text {
  font-family: var(--font-accent);
  font-weight: 400;
  font-size: 1.2rem;
  letter-spacing: 0.05em;
}

/* Mobile Nav */
.header__nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  height: 100dvh;
  background: var(--bg-secondary);
  padding: 100px 32px 40px;
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
  overflow-y: auto;
}

.header__nav.is-open {
  right: 0;
}

.header__nav-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.header__nav-link {
  display: block;
  padding: 16px 0;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.header__nav-link:hover {
  color: var(--accent);
}

.header__nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 24px;
  padding: 12px 24px;
  background: var(--accent);
  color: var(--bg-primary);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--radius);
  transition: background var(--transition);
}

.header__nav-cta:hover {
  background: var(--accent-light);
  color: var(--bg-primary);
}

/* Hamburger */
.header__hamburger {
  position: relative;
  z-index: 101;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  gap: 6px;
}

.header__hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.header__hamburger.is-active .header__hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.header__hamburger.is-active .header__hamburger-line:nth-child(2) {
  opacity: 0;
}

.header__hamburger.is-active .header__hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Nav Overlay */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* ===================================
   Hero
   =================================== */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 120px 20px 80px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(200, 150, 62, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(200, 150, 62, 0.05) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero__content {
  position: relative;
  text-align: center;
  max-width: 640px;
}

.hero__sub {
  margin-bottom: 16px;
}

.hero__sub-en {
  font-family: var(--font-accent);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
}

.hero__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.75rem, 5vw, 3rem);
  line-height: 1.5;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.hero__desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero__note {
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hero__scroll-text {
  font-family: var(--font-accent);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollLine 1.5s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { opacity: 0; transform: scaleY(0); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
  100% { opacity: 0; transform: scaleY(1); transform-origin: bottom; }
}

/* ===================================
   Section Common
   =================================== */
.section {
  padding: var(--section-padding) 0;
}

.section:nth-child(even) {
  background: var(--bg-secondary);
}

.section__header {
  text-align: center;
  margin-bottom: 48px;
}

.section__label {
  font-family: var(--font-accent);
  font-weight: 300;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: none;
}

.section__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2rem);
  letter-spacing: 0.05em;
}

.section__subtitle {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===================================
   About
   =================================== */
.about__grid {
  display: grid;
  gap: 40px;
}

.about__image {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.about__instagram {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.3s ease;
}

.about__instagram:hover {
  color: var(--accent);
}

.about__profile-img {
  border-radius: 50%;
  width: 150px;
  height: 150px;
  object-fit: cover;
}

.placeholder-image {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  overflow: hidden;
  color: var(--accent);
}

.placeholder-image--bar {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 50%, var(--bg-card) 100%);
  border: 1px solid var(--border);
}

.about__name {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.about__name-highlight {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--text-primary);
  display: block;
  margin-top: 4px;
}

.about__desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.about__desc:last-of-type {
  margin-bottom: 28px;
}

.about__info {
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.about__info-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about__info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.about__info-item dt {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.about__info-item dd {
  font-size: 0.9rem;
  color: var(--text-primary);
}

/* ===================================
   Features
   =================================== */
.features__grid {
  display: grid;
  gap: 24px;
}

.feature-card {
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.feature-card:hover {
  border-color: rgba(200, 150, 62, 0.3);
}

.feature-card__icon {
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-card__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 12px;
  letter-spacing: 0.03em;
}

.feature-card__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===================================
   Instagram
   =================================== */
.instagram__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.instagram__item {
  display: block;
  overflow: hidden;
  border-radius: 8px;
}

.instagram__item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.instagram__item:hover img {
  transform: scale(1.05);
}

.instagram__cta {
  text-align: center;
}

.instagram__note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ===================================
   First Visit
   =================================== */
.first-visit__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.barrier-card {
  padding: 24px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.barrier-card__number {
  font-family: var(--font-accent);
  font-weight: 600;
  font-size: 1.5rem;
  color: var(--accent);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: 8px;
}

.barrier-card__worry {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--accent-light);
  margin-bottom: 12px;
  line-height: 1.5;
}

.barrier-card__answer {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.first-visit__cta {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.first-visit__cta-lead {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.first-visit__dm-examples {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  align-items: center;
}

.dm-bubble {
  display: inline-block;
  padding: 10px 20px;
  background: rgba(200, 150, 62, 0.1);
  border: 1px solid rgba(200, 150, 62, 0.2);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.first-visit__cta-note {
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ===================================
   FAQ
   =================================== */
.faq__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.faq__item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq__question {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 16px;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--transition);
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question::marker {
  display: none;
  content: '';
}

.faq__question:hover {
  background: rgba(200, 150, 62, 0.05);
}

.faq__q-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--accent);
  color: var(--bg-primary);
  font-family: var(--font-accent);
  font-weight: 600;
  font-size: 0.85rem;
  border-radius: 50%;
}

.faq__q-text {
  flex: 1;
  font-size: 0.9rem;
  font-weight: 400;
  line-height: 1.6;
}

.faq__toggle {
  flex-shrink: 0;
  color: var(--text-dim);
  transition: transform 0.3s ease;
}

.faq__toggle svg line:first-child {
  transition: transform 0.3s ease;
  transform-origin: center;
}

details[open] .faq__toggle svg line:first-child {
  transform: scaleY(0);
}

.faq__answer {
  padding: 0 16px 20px 46px;
}

.faq__answer p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq__answer a {
  color: var(--accent-light);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.faq__cta {
  text-align: center;
}

.faq__cta-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* ===================================
   Access
   =================================== */
.access__grid {
  display: grid;
  gap: 32px;
}

.access__map {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.access__map iframe {
  display: block;
  width: 100%;
  height: 300px;
}

.access__info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.access__detail {
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.access__detail-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}

.access__detail-title svg {
  flex-shrink: 0;
}

.access__detail-text {
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.7;
}

.access__note {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.access__direction {
  padding: 20px;
  background: rgba(200, 150, 62, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.access__direction-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================
   Buttons
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  line-height: 1.4;
}

.btn__icon {
  flex-shrink: 0;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg-primary);
}

.btn--primary:hover {
  background: var(--accent-light);
  color: var(--bg-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(200, 150, 62, 0.3);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn--outline:hover {
  background: rgba(200, 150, 62, 0.1);
  color: var(--accent-light);
}

.btn--large {
  padding: 16px 32px;
  font-size: 0.95rem;
  width: 100%;
  max-width: 360px;
}

/* ===================================
   Site Summary (AI検索最適化)
   =================================== */
.site-summary {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.site-summary__title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.site-summary__text {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.8;
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}

.footer__cta {
  text-align: center;
  padding-bottom: 48px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.footer__cta-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.footer__info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  margin-bottom: 32px;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer__logo-icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 4px;
}

.footer__name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1rem;
}

.footer__address {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.footer__social {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 50%;
  transition: all var(--transition);
}

.footer__social:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.footer__bottom {
  text-align: center;
}

.footer__copyright {
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}

/* ===================================
   Tablet (768px+)
   =================================== */
@media (min-width: 768px) {
  :root {
    --section-padding: 100px;
  }

  .container {
    padding: 0 40px;
  }

  .sp-only {
    display: none;
  }

  /* Header */
  .header__hamburger {
    display: none;
  }

  .header__nav {
    position: static;
    width: auto;
    max-width: none;
    height: auto;
    background: none;
    padding: 0;
    overflow: visible;
  }

  .header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: 24px;
  }

  .header__nav-link {
    padding: 8px 0;
    font-size: 0.8rem;
    border-bottom: none;
  }

  .header__nav-cta {
    margin-top: 0;
    padding: 8px 20px;
    font-size: 0.8rem;
  }

  /* About */
  .about__grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
  }

  /* Features */
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Instagram */
  .instagram__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  /* Access */
  .access__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .access__map iframe {
    height: 100%;
    min-height: 400px;
  }

  /* FAQ */
  .faq__question {
    gap: 12px;
    padding: 20px 24px;
  }

  .faq__q-icon {
    width: 28px;
    height: 28px;
  }

  .faq__answer {
    padding: 0 24px 20px 64px;
  }

  /* Barrier card */
  .barrier-card {
    padding: 28px 24px;
  }

  /* CTA button */
  .btn--large {
    width: auto;
    padding: 16px 40px;
    font-size: 1rem;
  }

  /* Footer */
  .footer__info {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ===================================
   Desktop (1024px+)
   =================================== */
@media (min-width: 1024px) {
  :root {
    --section-padding: 120px;
  }

  .section__header {
    margin-bottom: 60px;
  }

  /* Features */
  .features__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Instagram */
  .instagram__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Barrier cards side by side */
  .first-visit__list {
    gap: 24px;
  }

  .barrier-card {
    padding: 32px 28px;
  }
}

/* ===================================
   Reduced Motion
   =================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }

  .hero__scroll-line {
    animation: none;
  }
}