/* ============================================
   ROPPONGI ARROW BILD. — Premium Stylesheet
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --navy-900: #0a0e1a;
  --navy-800: #0f1629;
  --navy-700: #141d38;
  --navy-600: #1a2648;
  --navy-500: #1e3058;
  --gold-400: #c9a84c;
  --gold-300: #d4b85c;
  --gold-200: #e0c96e;
  --gold-100: #f0dfa0;
  --silver-100: #f4f5f7;
  --silver-200: #e8eaed;
  --silver-300: #d1d5db;
  --silver-400: #9ca3af;
  --white: #ffffff;
  --white-alpha-05: rgba(255,255,255,0.05);
  --white-alpha-08: rgba(255,255,255,0.08);
  --white-alpha-10: rgba(255,255,255,0.10);
  --white-alpha-60: rgba(255,255,255,0.6);
  --white-alpha-80: rgba(255,255,255,0.8);
  --red-accent: #c0392b;
  --red-bg: rgba(192, 57, 43, 0.08);
  --red-border: rgba(192, 57, 43, 0.25);
  --font-display: 'Cormorant Garamond', 'Noto Serif JP', serif;
  --font-body: 'Noto Sans JP', 'Inter', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-accent: 'Inter', sans-serif;
  --transition-base: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--navy-900);
  color: var(--white);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 32px;
}

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

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

/* ============================================
   Loading Screen
   ============================================ */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--navy-900);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loader.loaded {
  opacity: 0;
  visibility: hidden;
}

.loader-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.loader-line {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-400), transparent);
  animation: loaderPulse 1.2s ease-in-out infinite;
}

.loader-text {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--gold-400);
  text-transform: uppercase;
}

@keyframes loaderPulse {
  0%, 100% { opacity: 0.3; transform: scaleX(0.5); }
  50% { opacity: 1; transform: scaleX(1); }
}

/* ============================================
   Scroll Animations
   ============================================ */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}

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

.fade-up.delay-1 { transition-delay: 0.15s; }
.fade-up.delay-2 { transition-delay: 0.3s; }
.fade-up.delay-3 { transition-delay: 0.45s; }
.fade-up.delay-4 { transition-delay: 0.6s; }

body.is-loaded .fade-up {
  /* ensure hero items animate on load */
}

/* ============================================
   Header
   ============================================ */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-base);
}

#site-header.is-scrolled {
  padding: 12px 0;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--white-alpha-08);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo .logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--gold-400);
  letter-spacing: 0.08em;
}

.header-nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-accent);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--white-alpha-60);
  transition: color var(--transition-base);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold-400);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--gold-400);
}

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

/* ============================================
   Hero Section
   ============================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-700) 50%, var(--navy-800) 100%);
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(201, 168, 76, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(201, 168, 76, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

.hero-bg-pattern::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23c9a84c' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(10, 14, 26, 0.3) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 120px 32px 80px;
}

.hero-badge {
  font-family: var(--font-accent);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.4em;
  color: var(--gold-400);
  text-transform: uppercase;
  margin-bottom: 40px;
}

.hero-logo-wrapper {
  display: inline-block;
  position: relative;
  margin-bottom: 48px;
}

.hero-logo-wrapper::before {
  content: '';
  position: absolute;
  inset: -30px;
  border: 1px solid var(--white-alpha-05);
  border-radius: 50%;
  animation: logoGlow 4s ease-in-out infinite;
}

.hero-logo-wrapper::after {
  content: '';
  position: absolute;
  inset: -60px;
  border: 1px solid var(--white-alpha-05);
  border-radius: 50%;
  animation: logoGlow 4s ease-in-out 1s infinite;
}

@keyframes logoGlow {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.02); }
}

.hero-logo-wrapper img {
  width: 340px;
  height: auto;
  transition: transform 0.6s ease, filter 0.6s ease;
}

.hero-logo-wrapper:hover img {
  transform: scale(1.03);
  filter: drop-shadow(0 0 30px rgba(201, 168, 76, 0.15));
}

.hero-title {
  margin-bottom: 16px;
}

.hero-title-sub {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.5em;
  color: var(--gold-300);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.hero-title-main {
  display: block;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--white);
  text-transform: uppercase;
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--white-alpha-60);
  margin-top: 8px;
}

/* Scroll Indicator */
.hero-scroll-indicator {
  margin-top: 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.hero-scroll-indicator span {
  display: block;
  width: 1px;
  height: 12px;
  background: var(--gold-400);
  opacity: 0;
  animation: scrollDown 2s ease-in-out infinite;
}

.hero-scroll-indicator span:nth-child(1) { animation-delay: 0s; }
.hero-scroll-indicator span:nth-child(2) { animation-delay: 0.2s; }
.hero-scroll-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes scrollDown {
  0% { opacity: 0; transform: translateY(-8px); }
  50% { opacity: 1; }
  100% { opacity: 0; transform: translateY(8px); }
}

/* ============================================
   Notice Section (Important Announcement)
   ============================================ */
#notice {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--navy-800) 0%, var(--navy-900) 100%);
  position: relative;
}

#notice::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 60px;
  background: linear-gradient(180deg, var(--gold-400), transparent);
}

.notice-card {
  background: linear-gradient(145deg, rgba(192, 57, 43, 0.06), rgba(192, 57, 43, 0.02));
  border: 1px solid var(--red-border);
  border-radius: 16px;
  overflow: hidden;
  position: relative;
}

.notice-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--red-accent), #e74c3c, var(--red-accent));
}

.notice-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 28px 36px 0;
}

.notice-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(192, 57, 43, 0.12);
  color: #e74c3c;
  flex-shrink: 0;
}

.notice-title {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  color: #e74c3c;
  letter-spacing: 0.06em;
}

.notice-body {
  padding: 24px 36px 36px;
}

.notice-date-label {
  font-family: var(--font-accent);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--silver-400);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.notice-headline {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.04em;
  margin-bottom: 24px;
  line-height: 1.6;
}

.notice-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.notice-text p {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--white-alpha-80);
  line-height: 2;
}

.notice-text strong {
  color: #e74c3c;
  font-weight: 600;
}

.notice-signature {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--white-alpha-08);
  text-align: right;
}

.notice-signature p {
  font-size: 0.85rem;
  color: var(--white-alpha-60);
  font-weight: 500;
}

/* ============================================
   Section Common
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  font-family: var(--font-accent);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--gold-400);
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.08em;
}

.section-line {
  width: 40px;
  height: 1px;
  background: var(--gold-400);
  margin: 20px auto 0;
}

/* ============================================
   News Section
   ============================================ */
#news {
  padding: 100px 0;
  background: var(--navy-900);
}

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

.news-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid var(--white-alpha-08);
  transition: background var(--transition-base);
}

.news-item:first-child {
  border-top: 1px solid var(--white-alpha-08);
}

.news-date {
  font-family: var(--font-accent);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--silver-400);
  letter-spacing: 0.06em;
  white-space: nowrap;
  min-width: 100px;
  padding-top: 3px;
}

.news-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 12px;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  background: rgba(192, 57, 43, 0.15);
  color: #e74c3c;
  border: 1px solid rgba(192, 57, 43, 0.3);
  flex-shrink: 0;
  margin-top: 3px;
}

.news-tag--info {
  background: rgba(201, 168, 76, 0.1);
  color: var(--gold-300);
  border-color: rgba(201, 168, 76, 0.25);
}

.news-body p {
  font-size: 0.9rem;
  color: var(--white-alpha-80);
  line-height: 1.8;
}

.news-sub {
  margin-top: 4px;
  font-size: 0.8rem !important;
  color: var(--silver-400) !important;
}

/* ============================================
   About Section
   ============================================ */
#about {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--navy-900) 0%, var(--navy-800) 100%);
}

.about-list {
  max-width: 700px;
  margin: 0 auto;
}

.about-row {
  display: flex;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--white-alpha-08);
}

.about-row:first-child {
  border-top: 1px solid var(--white-alpha-08);
}

.about-row dt {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gold-400);
  letter-spacing: 0.06em;
  min-width: 130px;
  flex-shrink: 0;
  padding-top: 2px;
}

.about-row dd {
  font-size: 0.9rem;
  color: var(--white-alpha-80);
  line-height: 1.8;
}

/* ============================================
   Footer
   ============================================ */
.footer-top {
  padding: 60px 0 40px;
  background: var(--navy-800);
  border-top: 1px solid var(--white-alpha-08);
  text-align: center;
}

.footer-logo-mark {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--gold-400);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--white-alpha-60);
  text-transform: uppercase;
}

.footer-brand-sub {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--silver-400);
  margin-top: 6px;
  letter-spacing: 0.06em;
}

.footer-bottom {
  padding: 16px 0;
  background: var(--navy-900);
  border-top: 1px solid var(--white-alpha-05);
  text-align: center;
}

.copyright {
  font-family: var(--font-accent);
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--silver-400);
  letter-spacing: 0.08em;
}

/* ============================================
   Responsive
   ============================================ */
@media screen and (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .header-nav {
    gap: 20px;
  }

  .nav-link {
    font-size: 0.65rem;
  }

  .hero-content {
    padding: 100px 20px 60px;
  }

  .hero-logo-wrapper img {
    width: 240px;
  }

  .hero-logo-wrapper::before {
    inset: -20px;
  }

  .hero-logo-wrapper::after {
    inset: -40px;
  }

  .hero-title-sub {
    font-size: 0.8rem;
    letter-spacing: 0.3em;
  }

  .hero-title-main {
    font-size: 2rem;
    letter-spacing: 0.08em;
  }

  .hero-tagline {
    font-size: 0.8rem;
    letter-spacing: 0.2em;
  }

  #notice {
    padding: 80px 0;
  }

  .notice-header {
    padding: 24px 24px 0;
  }

  .notice-body {
    padding: 20px 24px 28px;
  }

  .notice-headline {
    font-size: 1.1rem;
  }

  #news, #about {
    padding: 80px 0;
  }

  .news-item {
    flex-wrap: wrap;
    gap: 8px 16px;
    padding: 20px 0;
  }

  .news-date {
    min-width: auto;
  }

  .about-row {
    flex-direction: column;
    gap: 4px;
    padding: 16px 0;
  }

  .about-row dt {
    min-width: auto;
  }
}

@media screen and (max-width: 480px) {
  .hero-logo-wrapper img {
    width: 200px;
  }

  .hero-title-main {
    font-size: 1.6rem;
  }

  .hero-badge {
    font-size: 0.6rem;
    letter-spacing: 0.25em;
  }

  .section-title {
    font-size: 1.3rem;
  }

  .notice-text p {
    font-size: 0.85rem;
  }

  .news-item {
    flex-direction: column;
    gap: 8px;
  }
}