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

:root {
  /* Main theme */
  --blue: #2563eb;
  --blue-dark: #1a1a2e;
  --orange: #f97316;

  /* UNIVERSE26 */
  --uni-bg: #e8edf5;
  --uni-text: #2d3748;
  --uni-accent: #6b7fa3;

  /* ミックスリスト */
  --mix-bg: #1a3a2a;
  --mix-text: #e2ece6;
  --mix-accent: #5db88c;

  /* LIKE NUTS!! */
  --nuts-bg: #fbbf24;
  --nuts-text: #1a1a1a;
  --nuts-accent: #000;

  --radius: 12px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: 'Shippori Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  color: #3b2f2f;
  background: #faf7f2;
  overflow-x: hidden;
  line-height: 1.8;
}

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

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ================================
   HEADER
   ================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 16px 0;
  transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(47, 37, 34, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.15);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo img {
  height: 36px;
  width: auto;
  filter: invert(1) brightness(2);
}

.header-nav {
  display: flex;
  gap: 28px;
  align-items: center;
}

.header-nav a {
  color: #fff;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  opacity: 0.8;
  transition: opacity var(--transition);
}

.header-nav a:hover {
  opacity: 1;
}

.nav-bira {
  border: 1px solid rgba(255,255,255,0.4);
  padding: 6px 16px;
  border-radius: 100px;
}

.nav-bira:hover {
  background: rgba(255,255,255,0.1);
}

/* Hamburger */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 110;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  margin: 5px 0;
  transition: var(--transition);
}

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

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

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

/* Mobile nav */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(26, 26, 46, 0.97);
  z-index: 105;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-nav-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 32px;
  text-align: center;
}

.mobile-nav a {
  color: #fff;
  font-size: 1.3rem;
  font-weight: 300;
  letter-spacing: 0.08em;
}

/* Header dark (bira page) */
.header-dark {
  background: var(--blue-dark);
}

.header-back {
  color: #fff;
  font-size: 0.9rem;
  opacity: 0.8;
  transition: opacity var(--transition);
}

.header-back:hover {
  opacity: 1;
}

.header-page-title {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: 0.1em;
}

/* ================================
   BUTTONS
   ================================ */
.btn {
  display: inline-block;
  padding: 14px 48px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 4px 24px rgba(249, 115, 22, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(249, 115, 22, 0.5);
}

.btn-lg {
  padding: 18px 64px;
  font-size: 1.1rem;
}

.btn-text {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 8px 0;
  border-bottom: 2px solid currentColor;
  transition: all var(--transition);
}

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

/* ================================
   HERO (FV)
   ================================ */
#hero {
  position: relative;
  height: 100vh;
  height: 100svh;
  background: url("images/omote.png") center / cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.hero-text {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  color: #f3eee7;
  margin-bottom: 12vh;
}

.hero-logo {
  width: clamp(220px, 55vw, 480px);
  margin-bottom: 32px;
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero-sub {
  font-size: clamp(14px, 3vw, 24px);
  font-weight: 400;
  letter-spacing: 0.15em;
  opacity: 0;
  animation: fadeUp 0.8s 0.5s forwards;
}

.hero-omnibus {
  margin-top: 12px;
  font-size: clamp(13px, 2.5vw, 18px);
  letter-spacing: 0.3em;
  opacity: 0;
  animation: fadeUp 0.8s 0.7s forwards;
}

.hero-cta {
  margin-top: 40px;
  opacity: 0;
  animation: fadeUp 0.8s 0.9s forwards;
}

.hero-scroll-hint {
  position: absolute;
  z-index: 1;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: #f3eee7;
  opacity: 0;
  animation: fadeUp 0.8s 1.2s forwards;
}

.hero-scroll-hint span {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, #f3eee7, transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ================================
   BIRA LINK (after stages)
   ================================ */
.bira-link-section {
  padding: 80px 0;
  text-align: center;
  background: #f3eee7;
}

.bira-link-text {
  font-size: clamp(15px, 2.5vw, 18px);
  margin-bottom: 24px;
  opacity: 0.7;
  letter-spacing: 0.1em;
}

.leaflet-btn {
  display: inline-block;
  padding: 14px 44px;
  border: 1px solid #3b2f2f;
  color: #3b2f2f;
  border-radius: 30px;
  background: transparent;
  letter-spacing: 0.1em;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.leaflet-btn:hover {
  background: #3b2f2f;
  color: #fff;
}

/* ================================
   INFO SECTION
   ================================ */
#info {
  padding: 80px 20px;
  text-align: center;
  background: #faf7f2;
}

.catch {
  font-size: clamp(15px, 2.5vw, 18px);
  line-height: 2.2;
  opacity: 0.85;
  margin-bottom: 60px;
}

.info-heading {
  font-size: clamp(28px, 5vw, 40px);
  margin-bottom: 30px;
  letter-spacing: 0.1em;
}

.info-text {
  font-size: clamp(16px, 2.5vw, 20px);
  line-height: 2;
  margin-bottom: 20px;
}

.info-logo {
  display: block;
  margin: 28px auto 24px;
  max-width: 180px;
  filter: invert(1);
}

.reserve-btn {
  display: inline-block;
  margin-top: 40px;
  padding: 14px 44px;
  background: var(--orange);
  color: #fff;
  border-radius: 40px;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  transition: background 0.3s ease;
}

.reserve-btn:hover {
  background: #e8650f;
}

/* ================================
   STAGE SECTIONS
   ================================ */
.stage {
  padding: 120px 0;
  transition: background var(--transition);
}

.stage-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.stage-inner.reverse {
  direction: rtl;
}

.stage-inner.reverse > * {
  direction: ltr;
}

.stage-visual {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  transition: transform var(--transition);
}

.stage-visual:hover {
  transform: scale(1.02);
}

.stage-visual img {
  width: 100%;
  display: block;
}

.stage-num {
  display: block;
  font-size: 4rem;
  font-weight: 900;
  opacity: 0.1;
  line-height: 1;
  margin-bottom: -16px;
}

.stage-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.stage-author {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-bottom: 24px;
}

.stage-quote {
  font-size: 1rem;
  line-height: 2;
  margin-bottom: 24px;
  padding-left: 20px;
  border-left: 3px solid currentColor;
  opacity: 0.8;
}

.stage-cast {
  margin-bottom: 24px;
}

.stage-cast-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.5;
  margin-bottom: 4px;
}

.stage-cast p:not(.stage-cast-label) {
  font-size: 0.9rem;
  line-height: 1.9;
}

/* UNIVERSE26 */
.stage-universe {
  background: var(--uni-bg);
  color: var(--uni-text);
}

.stage-universe .stage-num {
  color: var(--uni-accent);
  opacity: 0.2;
}

.stage-universe .stage-quote {
  border-color: var(--uni-accent);
}

.stage-universe .btn-text {
  color: var(--uni-accent);
}

/* ミックスリスト */
.stage-mixlist {
  background: var(--mix-bg);
  color: var(--mix-text);
}

.stage-mixlist .stage-num {
  color: var(--mix-accent);
  opacity: 0.2;
}

.stage-mixlist .stage-quote {
  border-color: var(--mix-accent);
}

.stage-mixlist .btn-text {
  color: var(--mix-accent);
}

/* LIKE NUTS!! */
.stage-likenuts {
  background: var(--nuts-bg);
  color: var(--nuts-text);
}

.stage-likenuts .stage-num {
  color: var(--nuts-accent);
  opacity: 0.08;
}

.stage-likenuts .stage-quote {
  border-color: var(--nuts-accent);
}

.stage-likenuts .btn-text {
  color: var(--nuts-accent);
}

.stage-likenuts .stage-visual {
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

/* ================================
   FOOTER CTA
   ================================ */
.footer-cta {
  position: relative;
  padding: 120px 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.footer-cta-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.footer-cta-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
}

.footer-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--blue-dark) 0%, #0f0f23 100%);
  z-index: 1;
}

.footer-cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}

.footer-cta-text {
  font-size: clamp(16px, 2.5vw, 20px);
  line-height: 2;
  margin-bottom: 20px;
  opacity: 0.85;
}

/* ================================
   FOOTER
   ================================ */
.footer {
  background: #2f2522;
  color: #eee;
  padding: 56px 0 40px;
  text-align: center;
}

.footer-name {
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.footer-info {
  font-size: 0.85rem;
  line-height: 2;
  opacity: 0.6;
  margin-bottom: 24px;
}

.footer-sns {
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.footer-sns a {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.footer-sns a:hover {
  opacity: 1;
}

.footer-copy {
  font-size: 0.7rem;
  opacity: 0.25;
  letter-spacing: 0.1em;
}

/* ================================
   BIRA PAGE
   ================================ */
.bira-page {
  background: #0f0f1a;
}

.bira-hero {
  padding: 140px 24px 60px;
  text-align: center;
  color: #fff;
}

.bira-hero-title {
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 900;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.bira-hero-sub {
  font-size: 0.9rem;
  opacity: 0.5;
  line-height: 2;
}

.bira-section {
  padding: 60px 0;
}

.bira-section-title {
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-align: center;
  margin-bottom: 32px;
}

.bira-section-universe .bira-section-title {
  color: var(--uni-accent);
}

.bira-section-mixlist .bira-section-title {
  color: var(--mix-accent);
}

.bira-section-likenuts .bira-section-title {
  color: var(--nuts-bg);
}

.bira-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.bira-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255,255,255,0.03);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.bira-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
}

.bira-label {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  padding: 4px 12px;
  border-radius: 100px;
  z-index: 2;
  backdrop-filter: blur(8px);
}

.bira-img {
  width: 100%;
  display: block;
  transition: transform var(--transition);
}

.bira-card:hover .bira-img {
  transform: scale(1.03);
}

.bira-cta {
  padding: 60px 0 80px;
  text-align: center;
}

.bira-cta .btn-text {
  display: block;
  margin-top: 20px;
  color: rgba(255,255,255,0.5);
}

/* ================================
   LIGHTBOX
   ================================ */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 24px;
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 2.5rem;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity var(--transition);
  line-height: 1;
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-img {
  max-width: 90%;
  max-height: 90vh;
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

/* ================================
   ANIMATIONS
   ================================ */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.3); }
}

.fade-in {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ================================
   RESPONSIVE
   ================================ */
@media (max-width: 768px) {
  .header-nav {
    display: none;
  }

  .hamburger {
    display: block;
  }

  /* Hero mobile */
  .hero-logo {
    width: 260px;
    margin-bottom: 24px;
  }

  .hero-cta {
    margin-top: 32px;
  }

  /* Info mobile */
  #info {
    padding: 60px 20px;
  }

  .catch {
    font-size: 14px;
    margin-bottom: 40px;
  }

  .info-logo {
    max-width: 120px;
  }

  .reserve-btn {
    padding: 12px 36px;
    font-size: 0.9rem;
  }

  /* Stage mobile */
  .stage {
    padding: 80px 0;
  }

  .stage-inner,
  .stage-inner.reverse {
    grid-template-columns: 1fr;
    gap: 32px;
    direction: ltr;
  }

  .stage-visual {
    max-width: 360px;
    margin: 0 auto;
  }

  .stage-num {
    font-size: 3rem;
  }

  .bira-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-cta {
    padding: 80px 24px;
    min-height: auto;
  }

  .btn-lg {
    padding: 16px 48px;
    font-size: 1rem;
  }
}