/* ========================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ======================================== */
:root {
  /* Colors */
  --color-navy: #1B3A5C;
  --color-navy-dark: #0F2A45;
  --color-cream: #F8F5F0;
  --color-amber: #D4882A;
  --color-amber-dark: #B8741F;
  --color-charcoal: #2C2C2C;
  --color-gray-600: #4A5568;
  --color-gray-400: #A0AEC0;
  --color-gray-200: #E2E8F0;
  --color-white: #FFFFFF;

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

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

/* ========================================
   CSS RESET & BASE
   ======================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-charcoal);
  background-color: var(--color-cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

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

/* ========================================
   UTILITY CLASSES
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========================================
   SECTION HEADER
   ======================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header__en {
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-amber);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.section-header__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--color-navy);
}

.section-header--light .section-header__title {
  color: var(--color-white);
}

.section-header--light .section-header__en {
  color: var(--color-amber);
}

/* ========================================
   HEADER
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.header--scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.header__container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  flex-direction: column;
  transition: opacity var(--transition-fast);
}

.header__logo:hover {
  opacity: 0.8;
}

.header__logo-main {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  transition: color var(--transition-base);
}

.header__logo-sub {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 0.1em;
  transition: color var(--transition-base);
}

.header--scrolled .header__logo-main {
  color: var(--color-navy);
}

.header--scrolled .header__logo-sub {
  color: var(--color-gray-600);
}

.header__nav {
  display: none;
}

.header__nav-list {
  display: flex;
  gap: var(--space-xl);
}

.header__nav-link {
  font-size: 0.875rem;
  color: var(--color-white);
  transition: color var(--transition-fast);
  position: relative;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-amber);
  transition: width var(--transition-base);
}

.header__nav-link:hover::after {
  width: 100%;
}

.header--scrolled .header__nav-link {
  color: var(--color-charcoal);
}

.header__cta {
  display: none;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-amber);
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.header__cta:hover {
  background-color: var(--color-amber-dark);
}

.header__lang {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.header__lang:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
}

.header--scrolled .header__lang {
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.header--scrolled .header__lang:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.header__menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}

.header__menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.header--scrolled .header__menu-btn span {
  background-color: var(--color-charcoal);
}

.header__menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.header__menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.header__menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (min-width: 768px) {
  .header__nav {
    display: block;
  }

  .header__cta {
    display: inline-block;
  }

  .header__menu-btn {
    display: none;
  }
}

/* Mobile Navigation */
.header__nav.active {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  padding: var(--space-lg);
  box-shadow: var(--shadow-lg);
}

.header__nav.active .header__nav-list {
  flex-direction: column;
  gap: var(--space-md);
}

.header__nav.active .header__nav-link {
  color: var(--color-charcoal);
  display: block;
  padding: var(--space-sm) 0;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero__bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(27, 58, 92, 0.6) 0%,
    rgba(27, 58, 92, 0.4) 50%,
    rgba(27, 58, 92, 0.7) 100%
  );
}

.hero__content {
  text-align: center;
  color: var(--color-white);
  padding: var(--space-lg);
  max-width: 800px;
}

.hero__subtitle {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-sm);
  opacity: 0.9;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 6vw, 3.5rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

.hero__description {
  font-size: clamp(0.8125rem, 2vw, 1.125rem);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  opacity: 0.9;
}

.hero__cta {
  display: inline-block;
  padding: var(--space-sm) var(--space-xl);
  background-color: var(--color-amber);
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

@media (min-width: 768px) {
  .hero__content {
    padding: var(--space-xl);
  }

  .hero__subtitle {
    font-size: 1rem;
    letter-spacing: 0.3em;
    margin-bottom: var(--space-md);
  }

  .hero__title {
    margin-bottom: var(--space-xl);
  }

  .hero__description {
    line-height: 1.8;
    margin-bottom: var(--space-xl);
  }

  .hero__cta {
    padding: var(--space-md) var(--space-2xl);
    font-size: 1rem;
  }
}

.hero__cta:hover {
  background-color: var(--color-amber-dark);
  transform: translateY(-2px);
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
}

@media (min-width: 768px) {
  .hero__scroll {
    bottom: var(--space-xl);
    gap: var(--space-sm);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
  }
}

.hero__scroll-line {
  width: 1px;
  height: 24px;
  background: linear-gradient(to bottom, var(--color-white), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@media (min-width: 768px) {
  .hero__scroll-line {
    height: 40px;
  }
}

@keyframes scroll-line {
  0%, 100% {
    transform: scaleY(1);
    opacity: 1;
  }
  50% {
    transform: scaleY(0.5);
    opacity: 0.5;
  }
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
  padding: var(--space-4xl) var(--space-lg);
  background-color: var(--color-cream);
}

.about__container {
  max-width: 1200px;
  margin: 0 auto;
}

.about__intro {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.about__lead {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 2;
  color: var(--color-gray-600);
}

/* Gallery */
.about__gallery {
  position: relative;
  margin-bottom: var(--space-4xl);
}

.gallery {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.gallery__track {
  display: flex;
  transition: transform var(--transition-slow);
}

.gallery__slide {
  flex: 0 0 100%;
  aspect-ratio: 16 / 9;
}

.gallery__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery__controls {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 var(--space-md);
  pointer-events: none;
}

.gallery__btn {
  width: 48px;
  height: 48px;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-navy);
  pointer-events: auto;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.gallery__btn:hover {
  background-color: var(--color-white);
  transform: scale(1.1);
}

@media (min-width: 768px) {
  .gallery__slide {
    flex: 0 0 50%;
  }
}

@media (min-width: 1024px) {
  .gallery__slide {
    flex: 0 0 33.333%;
  }
}

/* Features */
.about__features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.feature {
  text-align: center;
  padding: var(--space-xl);
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.feature:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background-color: var(--color-cream);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-navy);
}

.feature__title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--space-md);
}

.feature__text {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.8;
}

@media (min-width: 768px) {
  .about__features {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   PLANS SECTION
   ======================================== */
.plans {
  padding: var(--space-4xl) var(--space-lg);
  background-color: var(--color-navy);
}

.plans__container {
  max-width: 1200px;
  margin: 0 auto;
}

.plans__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .plans__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Plan Card */
.plan-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base);
}

.plan-card:hover {
  transform: translateY(-8px);
}

.plan-card__image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.plan-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.plan-card:hover .plan-card__image img {
  transform: scale(1.05);
}

.plan-card__badge {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background-color: var(--color-navy);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.plan-card__badge--amber {
  background-color: var(--color-amber);
}

.plan-card__content {
  padding: var(--space-xl);
}

.plan-card__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--space-md);
}

.plan-card__description {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.plan-card__details {
  margin-bottom: var(--space-lg);
  padding: var(--space-md);
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
}

.plan-card__details li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-gray-600);
  padding: var(--space-xs) 0;
}

.plan-card__details svg {
  flex-shrink: 0;
  color: var(--color-navy);
}

.plan-card__cta {
  display: block;
  width: 100%;
  padding: var(--space-md);
  background-color: var(--color-navy);
  color: var(--color-white);
  text-align: center;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.plan-card__cta:hover {
  background-color: var(--color-navy-dark);
}

/* ========================================
   NEWS SECTION
   ======================================== */
.news {
  padding: var(--space-4xl) var(--space-lg);
  background-color: var(--color-cream);
}

.news__container {
  max-width: 900px;
  margin: 0 auto;
}

.news__list {
  margin-bottom: var(--space-2xl);
}

.news__item {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.news__item:first-child {
  border-top: 1px solid var(--color-gray-200);
}

.news__date {
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-gray-400);
}

.news__category {
  font-size: 0.75rem;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius-sm);
}

.news__link {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  transition: color var(--transition-fast);
}

.news__link:hover {
  color: var(--color-amber);
}

.news__more {
  display: block;
  text-align: center;
  padding: var(--space-md) var(--space-xl);
  border: 1px solid var(--color-navy);
  color: var(--color-navy);
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.news__more:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
}

@media (max-width: 640px) {
  .news__item {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .news__date {
    order: 1;
  }

  .news__category {
    order: 2;
    justify-self: start;
  }

  .news__link {
    order: 3;
  }
}

/* ========================================
   FAQ SECTION
   ======================================== */
.faq {
  padding: var(--space-4xl) var(--space-lg);
  background-color: var(--color-cream);
}

.faq__container {
  max-width: 900px;
  margin: 0 auto;
}

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

.faq__item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.faq__item:hover {
  box-shadow: var(--shadow-md);
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-navy);
  list-style: none;
}

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

.faq__question span {
  flex: 1;
}

.faq__icon {
  flex-shrink: 0;
  color: var(--color-amber);
  transition: transform var(--transition-base);
}

.faq__item[open] .faq__icon {
  transform: rotate(180deg);
}

.faq__answer {
  padding: 0 var(--space-xl) var(--space-lg);
}

.faq__answer p {
  font-size: 0.9375rem;
  color: var(--color-gray-600);
  line-height: 1.8;
}

/* ========================================
   ACCESS SECTION
   ======================================== */
.access {
  padding: var(--space-4xl) var(--space-lg);
  background-color: var(--color-navy);
}

.access__container {
  max-width: 1200px;
  margin: 0 auto;
}

.access__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

.access__info {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.access__group {
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.access__label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--color-amber);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.access__text {
  font-size: 0.9375rem;
  color: var(--color-white);
  line-height: 1.8;
}

.access__text a {
  color: var(--color-amber);
  transition: opacity var(--transition-fast);
}

.access__text a:hover {
  opacity: 0.8;
}

.access__map {
  aspect-ratio: 16 / 12;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.access__map iframe {
  width: 100%;
  height: 100%;
}

@media (min-width: 768px) {
  .access__info {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .access__content {
    grid-template-columns: 1fr 1fr;
  }
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: var(--space-4xl) var(--space-lg) var(--space-xl);
  background-color: var(--color-navy-dark);
  color: var(--color-white);
}

.footer__container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer__main {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-lg);
}

.footer__logo-main {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
}

.footer__logo-sub {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.1em;
}

.footer__description {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.footer__nav-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--color-amber);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.footer__nav-list li {
  margin-bottom: var(--space-sm);
}

.footer__nav-list a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer__nav-list a:hover {
  color: var(--color-white);
}

.footer__nav-list--contact li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.footer__nav-list--contact svg {
  color: var(--color-amber);
}

.footer__bottom {
  padding-top: var(--space-xl);
  text-align: center;
}

.footer__copyright {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

@media (min-width: 768px) {
  .footer__main {
    grid-template-columns: 1fr 2fr;
  }

  .footer__nav {
    grid-template-columns: repeat(3, 1fr);
  }
}