/* ========================================
   KEK Virtual Tour - Style Sheet
   ======================================== */

/* --- Furigana (default: hidden) --- */
ruby {
  ruby-position: over;
}
rt {
  font-size: 0;
  line-height: 0;
  visibility: hidden;
}
body.furigana-on rt {
  font-size: 0.5em;
  line-height: 1.2;
  visibility: visible;
}

/* --- Furigana toggle button --- */
.furigana-toggle {
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-white);
  background: transparent;
  border: 1px solid var(--color-subtle-15);
  border-radius: 9999px;
  padding: 6px 16px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  margin-left: 8px;
}
.furigana-toggle[aria-pressed="true"] {
  background: var(--color-orange);
  border-color: var(--color-orange);
}
.furigana-toggle:hover {
  border-color: var(--color-orange);
}


/* --- Custom Properties --- */
:root {
  --color-navy: #0A1628;
  --color-beige: #F5F1E8;
  --color-orange: #FF6B35;
  --color-white: #FFFFFF;
  --color-text-gray: #4B5563;
  --color-light-gray: #B0B8C8;
  --color-subtle-05: rgba(255, 255, 255, 0.05);
  --color-subtle-15: rgba(255, 255, 255, 0.15);
  --color-subtle-20: rgba(255, 255, 255, 0.2);
  --color-subtle-30: rgba(255, 255, 255, 0.3);
  --font-family: 'Noto Sans JP', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--color-white);
  background: var(--color-navy);
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

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

/* --- Tag Pill (shared) --- */
.tag-pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.3em;
  padding: 9px 25px;
  border-radius: 9999px;
  text-transform: uppercase;
}

.tag-pill--light {
  color: var(--color-white);
  border: 1px solid var(--color-subtle-30);
}

.tag-pill--dark {
  color: var(--color-navy);
  border: 1px solid var(--color-navy);
}

/* ========================================
   Header
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background-color 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
}

.header--scrolled {
  background-color: #fff;
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

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

.header--scrolled .furigana-toggle {
  color: var(--color-navy);
  border-color: rgba(10, 22, 40, 0.2);
}
.header--scrolled .furigana-toggle[aria-pressed="true"] {
  color: var(--color-white);
  border-color: var(--color-orange);
}


.header__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 52px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo img {
  height: 40px;
  width: auto;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.header__nav-link {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-white);
  transition: opacity 0.2s;
}

.header__nav-link:hover {
  opacity: 0.7;
}

/* ========================================
   Section 1: Hero
   ======================================== */
.hero {
  position: relative;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: url('../images/hero-bg-opt.webp') center / cover no-repeat;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0.4) 100%);
}

.hero__accent-box {
  position: absolute;
  top: 212px;
  left: 912px;
  width: 576px;
  height: 601px;
  background: var(--color-subtle-05);
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
  padding-left: 120px;
  box-sizing: border-box;
}

.hero__heading {
  margin-top: 24px;
  font-size: 91px;
  font-weight: 500;
  letter-spacing: 0.025em;
  line-height: 1.15;
  color: var(--color-white);
}

.hero__description {
  margin-top: 24px;
  font-size: 20px;
  font-weight: 300;
  color: var(--color-white);
}

.hero__cta {
  margin-top: 48px;
  display: inline-flex;
  align-items: center;
  gap: 24px;
  background: #000;
  border-radius: 9999px;
  padding: 20px 32px;
  transition: opacity 0.2s;
}

.hero__cta:hover {
  opacity: 0.85;
}

.hero__cta-play {
  flex-shrink: 0;
}

.hero__cta-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.025em;
  color: var(--color-white);
}

.hero__cta-arrow {
  flex-shrink: 0;
}

/* Marquee */
.hero__marquee {
  position: absolute;
  bottom: 40px;
  left: 0;
  width: 100%;
  height: 24px;
  overflow: hidden;
  z-index: 2;
}

.hero__marquee-track {
  display: flex;
  white-space: nowrap;
  animation: marquee-scroll 20s linear infinite;
}

.hero__marquee-track span {
  font-size: 14px;
  font-weight: 200;
  letter-spacing: 0.3em;
  color: var(--color-subtle-20);
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ========================================
   Section 2: Highlights
   ======================================== */
.highlights {
  background: var(--color-navy);
  padding: 128px 0 0;
}

.highlights__container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 52px;
}

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

.highlights__title {
  margin-top: 24px;
  font-size: 48px;
  font-weight: 500;
  letter-spacing: 0.025em;
  color: var(--color-white);
}

.highlights__subtitle {
  margin-top: 16px;
  font-size: 18px;
  font-weight: 300;
  color: var(--color-white);
}

.highlights__tabs {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--color-subtle-15);
}

.highlights__tab {
  font-family: var(--font-family);
  font-size: 18px;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.5);
  padding: 14px 32px;
  border-radius: 0;
  border: 1px solid transparent;
  border-bottom: none;
  background: transparent;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s, box-shadow 0.2s;
  margin-bottom: -1px;
  position: relative;
}

.highlights__tab--active {
  color: var(--color-white);
  background: rgba(255, 107, 53, 0.08);
  border-color: var(--color-subtle-15);
  border-bottom: 2px solid var(--color-orange);
}

.highlights__tab:not(.highlights__tab--active):hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
}

/* Card */
.highlights__card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  min-height: 480px;
  display: flex;
}

.highlights__card-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.highlights__card-bg--active {
  opacity: 1;
}

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

.highlights__card-sidebar {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
  padding: 32px 24px;
  width: 160px;
  flex-shrink: 0;
}

.highlights__card-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 300;
  color: var(--color-white);
  white-space: nowrap;
}

.highlights__card-divider {
  width: 100%;
  height: 1px;
  background: var(--color-subtle-20);
}

/* Panels */
.highlights__panel {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 32px;
  opacity: 0;
  transform: translateX(40px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.highlights__panel--active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.highlights__panel-content {
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(6px);
  border-radius: 12px;
  padding: 40px;
  max-width: 520px;
}

.highlights__panel-tag {
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: var(--color-white);
}

.highlights__panel-title {
  margin-top: 12px;
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-white);
}

.highlights__panel-desc {
  margin-top: 16px;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.625;
  color: var(--color-white);
}

.highlights__panel-cta {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  margin-top: 24px;
  background: #000;
  border-radius: 9999px;
  padding: 16px 28px;
  transition: opacity 0.2s;
}

.highlights__panel-cta:hover {
  opacity: 0.85;
}

.highlights__panel-cta-play {
  flex-shrink: 0;
}

.highlights__panel-cta-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.025em;
  color: var(--color-white);
}

.highlights__panel-cta-arrow {
  flex-shrink: 0;
}

/* ========================================
   Section: Features
   ======================================== */
.features {
  padding: 0;
  background: var(--color-navy);
}

.features__hero {
  background: var(--color-navy);
  padding: 18px 52px 34px;
  text-align: center;
}

.features__heading {
  margin-top: 24px;
  font-size: 48px;
  font-weight: 500;
  color: var(--color-white);
}

.features__subtitle {
  margin-top: 20px;
  font-size: 18px;
  font-weight: 300;
  color: var(--color-white);
}

.features__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 52px 96px;
}


.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.features__card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 32px 32px;
  display: flex;
  flex-direction: column;
  transition: background 0.2s, border-color 0.2s;
}


.features__card--disabled {
  cursor: default;
  opacity: 0.5;
}

.features__card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 8px;
  margin-top: 16px;
}

.features__card-num {
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--color-orange);
}

.features__card-label {
  margin-top: 0;
  font-size: 28px;
  font-weight: 500;
  color: var(--color-white);
}

.features__card-title {
  margin-top: 8px;
  font-size: 18px;
  font-weight: 500;
  color: var(--color-white);
}

.features__card-desc {
  margin-top: 16px;
  font-size: 15px;
  font-weight: 300;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.7);
  flex-grow: 1;
}

.features__card-divider {
  margin-top: auto;
  padding-top: 24px;
  border-bottom: none;
}

.features__card-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 17px;
  font-weight: 500;
  color: var(--color-orange);
  text-decoration: none;
  border-bottom: 1px solid var(--color-orange);
  padding-bottom: 4px;
  transition: opacity 0.2s;
}

.features__card-cta:hover {
  opacity: 0.7;
}

.features__card-coming {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.35);
}

/* ========================================
   Section 3: History
   ======================================== */
.history {
  background-color: var(--color-beige);
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Cpath d='M20 14v12M14 20h12' stroke='%23ddd6cc' stroke-width='1' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-size: 40px 40px;
  padding: 128px 0;
}

.history__container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 52px;
  display: flex;
  gap: 64px;
}

.history__left {
  flex-shrink: 0;
  width: 403px;
}

.history__heading {
  margin-top: 24px;
  font-size: 60px;
  font-weight: 500;
  letter-spacing: 0.025em;
  line-height: 1;
  color: var(--color-navy);
}

.history__subtitle {
  margin-top: 16px;
  font-size: 18px;
  font-weight: 300;
  color: var(--color-text-gray);
}

/* Timeline */
.history__timeline {
  flex: 1;
  position: relative;
  padding-left: 48px;
}

.history__timeline-line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-orange);
}

.history__timeline-item {
  position: relative;
  padding-bottom: 48px;
}

.history__timeline-item:last-child {
  padding-bottom: 0;
}

.history__timeline-dot {
  position: absolute;
  left: -48px;
  top: 32px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--color-orange);
  background: var(--color-beige);
  transform: translateX(-50%);
  left: -47px;
  z-index: 1;
}

.history__card {
  background: var(--color-white);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.history__year {
  display: block;
  font-size: 72px;
  font-weight: 700;
  color: var(--color-orange);
  line-height: 1;
  margin-bottom: 16px;
}

.history__year--text {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.history__card-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-navy);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.history__card-title--visible {
  opacity: 1;
  transform: translateY(0);
}

.history__card-desc {
  margin-top: 12px;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.625;
  color: var(--color-text-gray);
}

.history__progress {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid #e5e5e5;
}

.history__progress-bar {
  height: 4px;
  background: linear-gradient(90deg, var(--color-orange) 0%, var(--color-navy) 100%);
  border-radius: 2px;
}

.history__progress-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-navy);
}

/* ========================================
   Section 4: Features
   ======================================== */
.features {
  background: var(--color-navy);
  padding: 128px 0;
}

.features__container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 52px;
}

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

.features__title {
  margin-top: 24px;
  font-size: 48px;
  font-weight: 200;
  letter-spacing: 0.025em;
  color: var(--color-white);
}

.features__icons {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 64px;
}

.features__icon-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 300;
  color: var(--color-white);
  transition: opacity 0.2s;
}

.features__icon-link:hover {
  opacity: 0.7;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.features__card {
  background: var(--color-subtle-05);
  border: 1px solid var(--color-subtle-15);
  border-radius: 12px;
  padding: 32px;
}

.features__card-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
}

.features__card-desc {
  margin-top: 12px;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.625;
  color: var(--color-white);
}

/* ========================================
   Section 5: Support CTA
   ======================================== */
.support {
  position: relative;
  padding: 128px 0;
  text-align: center;
  overflow: hidden;
}

.support__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: url('../images/support-bg.webp') center / cover no-repeat;
}

.support__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 22, 40, 0.85);
}

.support__container {
  position: relative;
  z-index: 1;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 52px;
}

.support__heading {
  margin-top: 24px;
  font-size: 48px;
  font-weight: 500;
  letter-spacing: 0.025em;
  line-height: 1.3;
  color: var(--color-white);
}

.support__desc {
  margin-top: 24px;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.625;
  color: var(--color-white);
}

.support__cta {
  display: inline-block;
  margin-top: 48px;
  background: var(--color-orange);
  color: var(--color-white);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.025em;
  padding: 20px 48px;
  border-radius: 9999px;
  transition: opacity 0.2s;
}

.support__cta:hover {
  opacity: 0.85;
}

.support__cta-heart {
  margin-right: 8px;
}

.support__note {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 300;
  color: var(--color-white);
}

/* ========================================
   Section 6: Footer
   ======================================== */
.footer {
  background: var(--color-navy);
  border-top: 1px solid var(--color-subtle-15);
  padding: 64px 0 32px;
}

.footer__container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 52px;
}

.footer__top {
  display: flex;
  align-items: center;
  gap: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-subtle-15);
}

.footer__brand {
  flex: 1;
  max-width: 320px;
}

.footer__logo {
  margin-bottom: 16px;
}

.footer__brand-desc {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--color-white);
}

.footer__nav-group {
  display: flex;
  align-items: center;
  gap: 64px;
}

.footer__nav-heading {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
}

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

.footer__nav-list a {
  font-size: 14px;
  font-weight: 300;
  color: var(--color-white);
  transition: opacity 0.2s;
}

.footer__nav-list a:hover {
  opacity: 0.7;
}

.footer__official-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  transition: opacity 0.2s;
  text-decoration: underline;
  text-underline-offset: 4px;
  display: inline-block;
  margin-top: 20px;
}

.footer__official-link:hover {
  opacity: 0.7;
}

.footer__social {
  margin-left: auto;
}

.footer__social-icons {
  display: flex;
  gap: 16px;
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-subtle-05);
  border: 1px solid var(--color-subtle-15);
  transition: background 0.2s;
}

.footer__social-link:hover {
  background: var(--color-subtle-15);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  font-size: 13px;
  font-weight: 300;
  color: var(--color-white);
}

.footer__bottom-links {
  display: flex;
  gap: 24px;
}

.footer__bottom-links a {
  color: var(--color-white);
  transition: opacity 0.2s;
}

.footer__bottom-links a:hover {
  opacity: 0.7;
}

/* ========================================
   Hamburger Menu
   ======================================== */
.header__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.header--scrolled .header__hamburger span {
  background: var(--color-navy);
}

.header__hamburger--open span {
  background: var(--color-white) !important;
}
.header__hamburger--open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.header__hamburger--open span:nth-child(2) {
  opacity: 0;
}
.header__hamburger--open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   Responsive: Tablet (max-width: 1024px)
   ======================================== */
@media (max-width: 1024px) {
  /* Header */
  .header__inner {
    padding: 0 32px;
  }

  .header__nav {
    gap: 24px;
  }

  /* Hero */
  .hero__content {
    padding-left: 64px;
    padding-right: 32px;
  }

  .hero__heading {
    font-size: 72px;
  }

  .hero__accent-box {
    display: none;
  }

  /* Highlights */
  .highlights {
    padding: 80px 0 48px;
  }

  .highlights__container {
    padding: 0 32px;
  }

  .highlights__title {
    font-size: 36px;
  }

  .highlights__card {
    flex-direction: column;
    min-height: 520px;
  }

  .highlights__card-sidebar {
    flex-direction: row;
    width: 100%;
    padding: 20px 24px;
    gap: 16px;
  }

  .highlights__card-divider {
    width: 1px;
    height: 24px;
  }

  .highlights__panel {
    padding: 24px;
  }

  .highlights__panel-content {
    max-width: 100%;
  }

  .highlights__panel-title {
    font-size: 28px;
  }

  /* Features */
  .features__hero {
    padding: 40px 32px 48px;
  }

  .features__heading {
    font-size: 36px;
  }

  .features__subtitle {
    font-size: 16px;
  }

  .features__container {
    padding: 0 32px 64px;
  }

  .features__grid {
    grid-template-columns: 1fr 1fr;
  }

  .features__card {
    padding: 32px 24px;
  }

  .features__card-label {
    font-size: 24px;
  }

  .features__card-title {
    font-size: 16px;
  }

  /* History */
  .history {
    padding: 80px 0;
  }

  .history__container {
    padding: 0 32px;
    gap: 40px;
  }

  .history__left {
    width: 280px;
  }

  .history__heading {
    font-size: 44px;
  }

  .history__year {
    font-size: 56px;
  }

  .history__card-title {
    font-size: 20px;
  }

  /* Support */
  .support {
    padding: 80px 0;
  }

  .support__container {
    padding: 0 32px;
  }

  .support__heading {
    font-size: 36px;
  }

  /* Footer */
  .footer__container {
    padding: 0 32px;
  }

  .footer__top {
    flex-wrap: wrap;
    gap: 40px;
  }

  .footer__brand {
    max-width: 100%;
    flex-basis: 100%;
  }

  .footer__bottom {
    flex-wrap: wrap;
    gap: 16px;
  }
}

/* ========================================
   Responsive: Mobile (max-width: 768px)
   ======================================== */
@media (max-width: 768px) {
  /* Header */
  .header__inner {
    padding: 0 20px;
    height: 64px;
  }

  .header__logo img {
    height: 32px;
  }

  .header__hamburger {
    display: flex;
  }

  .header__nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    max-height: 50vh;
    padding: 80px 20px 40px;
    background: rgba(10, 22, 40, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 1000;
  }

  .header__nav--open {
    display: flex;
  }

  .header__nav--open .header__nav-link {
    color: var(--color-white);
    font-size: 20px;
  }

  .header__nav--open .furigana-toggle {
    color: var(--color-white);
    border-color: var(--color-subtle-30);
    font-size: 16px;
    padding: 10px 24px;
  }

  /* Hero */
  .hero__content {
    padding-left: 24px;
    padding-right: 24px;
  }

  .hero__heading {
    font-size: 48px;
    line-height: 1.2;
  }

  .hero__description {
    font-size: 16px;
    margin-top: 16px;
  }

  .hero__cta {
    margin-top: 32px;
    padding: 16px 24px;
    gap: 16px;
  }

  .hero__cta-play {
    width: 40px;
    height: 40px;
  }

  .hero__cta-text {
    font-size: 14px;
  }

  .hero__cta-arrow {
    width: 20px;
    height: 24px;
  }

  .hero__marquee {
    bottom: 20px;
  }

  /* Features */
  .features {
    padding: 32px 0;
  }

  .features__hero {
    padding: 16px 20px 16px;
  }

  .features__heading {
    font-size: 28px;
  }

  .features__subtitle {
    font-size: 14px;
    margin-top: 12px;
  }

  .features__container {
    padding: 0 20px 16px;
  }

  .features__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .features__card {
    padding: 28px 24px;
  }

  .features__card-label {
    font-size: 22px;
  }

  .features__card-img {
    height: 180px;
  }

  .features__panel-cta {
    padding: 12px 20px;
    gap: 16px;
  }

  .features__panel-cta-text {
    font-size: 14px;
  }

  /* Highlights */
  .highlights {
    padding: 32px 0;
  }

  .highlights__container {
    padding: 0 20px;
  }

  .highlights__title {
    font-size: 28px;
  }

  .highlights__subtitle {
    font-size: 15px;
  }

  .highlights__tabs {
    gap: 0;
    margin-bottom: 32px;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    touch-action: pan-x;
    justify-content: center;
    padding: 0 20px;
  }

  .highlights__tabs::-webkit-scrollbar {
    display: none;
  }

  .highlights__tab {
    font-size: 12px;
    padding: 10px 12px;
    white-space: nowrap;
    flex-shrink: 0;
    font-weight: 400;
  }

  .highlights__card-sidebar {
    display: none;
  }

  .highlights__panel {
    padding: 20px;
  }

  .highlights__panel-content {
    padding: 24px;
  }

  .highlights__panel-title {
    font-size: 22px;
  }

  .highlights__panel-desc {
    font-size: 15px;
  }

  /* History */
  .history {
    padding: 32px 0;
  }

  .history__container {
    padding: 0 20px;
    flex-direction: column;
    gap: 32px;
  }

  .history__left {
    width: 100%;
    padding-left: 8px;
  }

  .history__heading {
    font-size: 36px;
    font-weight: 500;
  }

  .history__timeline {
    padding-left: 0;
  }

  .history__timeline-line,
  .history__timeline-dot {
    display: none;
  }

  .history__timeline-item {
    position: relative;
  }

  .history__timeline-item {
    padding-bottom: 0;
  }

  .history__timeline-item:not(:last-child)::after {
    content: '';
    display: block;
    width: 3px;
    height: 32px;
    background: var(--color-orange);
    margin: 0 0 0 40px;
  }

  .history__year {
    font-size: 48px;
  }

  .history__card {
    padding: 24px;
  }

  .history__card-title {
    font-size: 18px;
  }

  /* Support */
  .support {
    padding: 32px 0;
  }

  .support__container {
    padding: 0 20px;
  }

  .support__heading {
    font-size: 28px;
  }

  .support__desc {
    font-size: 15px;
  }

  .support__desc br {
    display: none;
  }

  .support__cta {
    font-size: 16px;
    padding: 16px 36px;
    margin-top: 32px;
  }

  /* Footer */
  .footer {
    padding: 32px 0 24px;
  }

  .footer__container {
    padding: 0 20px;
  }

  .footer__top {
    flex-direction: column;
    gap: 32px;
  }

  .footer__nav-group {
    gap: 40px;
  }

  .footer__social {
    margin-left: 0;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    font-size: 12px;
  }
}

/* ========================================
   Responsive: Small Mobile (max-width: 480px)
   ======================================== */
@media (max-width: 480px) {
  .hero__heading {
    font-size: 36px;
  }

  .hero__description {
    font-size: 14px;
  }

  .hero__cta-text {
    font-size: 12px;
  }

  .features__heading {
    font-size: 24px;
  }

  .features__card-label {
    font-size: 20px;
  }

  .features__card-title {
    font-size: 15px;
  }

  .features__card-desc {
    font-size: 14px;
  }

  .highlights__title {
    font-size: 24px;
  }

  .highlights__panel-title {
    font-size: 20px;
  }

  .highlights__panel-desc {
    font-size: 14px;
  }

  .history__heading {
    font-size: 28px;
  }

  .history__year {
    font-size: 40px;
  }

  .history__card-title {
    font-size: 16px;
  }

  .support__heading {
    font-size: 24px;
  }

  .footer__nav-group {
    flex-direction: column;
    gap: 24px;
  }
}