* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

html {
  scroll-behavior: smooth;
  background: #000;
}

body {
  background:
    radial-gradient(circle at top, rgba(246, 174, 84, 0.08), transparent 24%),
    linear-gradient(180deg, #050505 0%, #0b0b0b 45%, #000 100%);
  color: #fff;
  line-height: 1.8;
  overflow-x: hidden;
  word-break: keep-all;
  overflow-wrap: anywhere;
  opacity: 0;
  transition: opacity 0.6s ease;
  min-height: 100vh;
}

body.page-show {
  opacity: 1;
}

body.page-hide {
  opacity: 0;
}

body.menu-open {
  overflow: hidden;
}

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

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

/* ===== ヘッダー ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 90px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.94), rgba(10, 10, 10, 0.88));
  border-bottom: 1px solid rgba(255, 215, 160, 0.14);
  z-index: 1000;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.26);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.logo {
  position: absolute;
  left: 40px;
  top: 50%;
  transform: translateY(-50%);
  margin: 0;
  z-index: 1200;
}

.logo a {
  display: flex;
  align-items: center;
}

.logo img {
  height: 58px;
  width: auto;
  object-fit: contain;
}

.nav {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 1100;
}

.nav ul {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav a {
  position: relative;
  display: inline-block;
  color: #fff;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.03em;
  padding: 10px 16px;
  border-radius: 10px;
  white-space: nowrap;
  transition:
    color 0.3s ease,
    background-color 0.3s ease,
    transform 0.3s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 6px;
  height: 2px;
  background: linear-gradient(90deg, #f6ae54, #ffd7a0);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  border-radius: 999px;
}

.nav a:hover {
  color: #ffd7a0;
  background-color: rgba(246, 174, 84, 0.1);
  transform: translateY(-1px);
}

.nav a:hover::after {
  transform: scaleX(1);
}

/* ===== ハンバーガー ===== */
.hamburger {
  display: none;
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 30px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1300;
  border-radius: 8px;
  transition: background-color 0.3s ease;
}

.hamburger:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.hamburger span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 3px;
  background: #fff;
  border-radius: 999px;
  transition: all 0.35s ease;
}

.hamburger span:nth-child(1) {
  top: 1px;
}

.hamburger span:nth-child(2) {
  top: 13px;
}

.hamburger span:nth-child(3) {
  top: 25px;
}

.hamburger.active span:nth-child(1) {
  top: 13px;
  transform: rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
  top: 13px;
  transform: rotate(-45deg);
}

/* ===== ページ ===== */
.kyoen-page {
  width: 100%;
  min-height: 100vh;
  padding-top: 90px;
}

.kyoen-section {
  padding: 0 20px 34px;
}

.kyoen-container {
  width: min(1100px, 100%);
  margin: 0 auto;
}

.kyoen-hero {
  padding: 70px 20px 46px;
}

.kyoen-hero-inner {
  width: min(1100px, 100%);
  margin: 0 auto;
  text-align: center;
}

.kyoen-line {
  width: 140px;
  height: 1px;
  margin: 0 auto 30px;
  background: linear-gradient(90deg, transparent, #ffd7a0, transparent);
}

.kyoen-kicker {
  color: #e7cfaa;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.22em;
  margin-bottom: 18px;
}

.kyoen-hero h2 {
  font-size: clamp(40px, 7vw, 78px);
  line-height: 1.15;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  color: #fff;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.34);
}

.kyoen-sub {
  display: block;
  margin-bottom: 14px;
  color: rgba(255, 255, 255, 0.94);
  font-size: clamp(14px, 1.8vw, 18px);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.7;
}

.kyoen-meta {
  display: inline-block;
  margin-bottom: 24px;
  padding: 6px 14px;
  border-radius: 999px;
  color: #ffd7a0;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
  background: rgba(255, 215, 160, 0.08);
  border: 1px solid rgba(255, 215, 160, 0.18);
}

.kyoen-lead {
  width: min(760px, 100%);
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(15px, 2vw, 18px);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 8px 16px;
  border: 1px solid rgba(255, 215, 160, 0.28);
  border-radius: 999px;
  color: #fff1d7;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
  background:
    linear-gradient(180deg, rgba(255, 215, 160, 0.12), rgba(246, 174, 84, 0.08));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 8px 24px rgba(0, 0, 0, 0.18);
}

.kyoen-info-card,
.schedule-card,
.back-card {
  padding: 38px 40px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 215, 160, 0.12);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.kyoen-info-card h3,
.schedule-card h3 {
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.2;
  margin-bottom: 22px;
  color: #fff;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.info-item {
  padding: 20px 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 215, 160, 0.12);
}

.info-head {
  display: block;
  margin-bottom: 8px;
  color: #e7cfaa;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.info-body {
  display: block;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.5;
}

.notice-box {
  margin-top: 24px;
  padding: 18px 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 215, 160, 0.1);
}

.notice-box p {
  color: rgba(255, 255, 255, 0.74);
  font-size: 14px;
  line-height: 1.9;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.schedule-head {
  text-align: center;
  margin-bottom: 24px;
}

.schedule-head p {
  color: rgba(255, 255, 255, 0.74);
  font-size: 15px;
}

.schedule-placeholder {
  display: grid;
  place-items: center;
  min-height: 360px;
  padding: 40px 20px;
  border-radius: 24px;
  border: 1px solid rgba(255, 215, 160, 0.14);
  background:
    radial-gradient(circle at center, rgba(246, 174, 84, 0.08), transparent 46%),
    rgba(255, 255, 255, 0.03);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.24);
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.placeholder-main {
  color: #fff;
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.placeholder-sub {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.7);
  font-size: clamp(14px, 2vw, 18px);
  letter-spacing: 0.08em;
}

.schedule-image-wrap {
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid rgba(255, 215, 160, 0.14);
  background: rgba(0, 0, 0, 0.25);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.24);
  max-width: 860px;
  margin: 0 auto;
}

.schedule-image {
  width: 100%;
  height: auto;
  display: block;
}

.is-hidden {
  display: none;
}

.back-card {
  display: flex;
  justify-content: center;
  align-items: center;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 240px;
  height: 56px;
  padding: 0 28px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(90deg, #8f5c17, #d59c49);
  box-shadow: 0 12px 24px rgba(143, 92, 23, 0.22);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.back-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(143, 92, 23, 0.28);
}

/* ===== スクロールアニメーション ===== */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.delay-1 {
  transition-delay: 0.2s;
}

.delay-2 {
  transition-delay: 0.4s;
}

/* ===== フッター ===== */
.footer {
  position: relative;
  background: linear-gradient(180deg, #0b0b0b 0%, #000 100%);
  color: #fff;
  overflow: hidden;
  padding: 90px 20px 36px;
  margin-top: 40px;
}

.footer-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 18%, rgba(246, 174, 84, 0.16), transparent 32%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.02) 25%, transparent 25%),
    linear-gradient(225deg, rgba(255, 255, 255, 0.02) 25%, transparent 25%);
  background-size: auto, 36px 36px, 36px 36px;
  background-position: center, 0 0, 18px 18px;
  opacity: 0.55;
  pointer-events: none;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(1200px, 92%);
  height: 2px;
  background: linear-gradient(
    90deg,
    rgba(246, 174, 84, 0) 0%,
    rgba(246, 174, 84, 0.95) 20%,
    rgba(255, 215, 160, 1) 50%,
    rgba(246, 174, 84, 0.95) 80%,
    rgba(246, 174, 84, 0) 100%
  );
}

.footer-inner {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.footer-top-line {
  width: 120px;
  height: 1px;
  margin: 0 auto 34px;
  background: linear-gradient(90deg, transparent, #ffd7a0, transparent);
  opacity: 0.9;
}

.footer-logo-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 22px;
}

.footer-logo {
  width: auto;
  max-width: min(90vw, 520px);
  height: auto;
  filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.35));
}

.footer-subtitle {
  color: #e7cfaa;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin-bottom: 34px;
}

.footer-nav {
  list-style: none;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.footer-nav a {
  position: relative;
  color: rgba(255, 255, 255, 0.82);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 2px;
  transition: color 0.3s ease;
}

.footer-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #f6ae54, #ffd7a0);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  border-radius: 999px;
}

.footer-nav a:hover {
  color: #ffd7a0;
}

.footer-nav a:hover::after {
  transform: scaleX(1);
}

.footer-info {
  margin-bottom: 24px;
}

.footer-info p:first-child {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.08em;
}

.footer-info p:last-child {
  margin-top: 6px;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.46);
  letter-spacing: 0.12em;
}

.footer-copy {
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.06em;
}

/* ===== タブレット ===== */
@media screen and (max-width: 1200px) {
  .hamburger {
    display: block;
  }

  .nav {
    position: fixed;
    top: 90px;
    right: 0;
    left: auto;
    transform: translateX(100%);
    width: min(360px, 82vw);
    height: calc(100svh - 90px);
    padding: 28px 22px;
    background: rgba(0, 0, 0, 0.94);
    border-left: 1px solid rgba(255, 215, 160, 0.16);
    box-shadow: -18px 0 40px rgba(0, 0, 0, 0.36);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform 0.35s ease;
    overflow-y: auto;
  }

  .nav::before {
    content: "";
    position: absolute;
    top: 22px;
    bottom: 22px;
    left: 0;
    width: 3px;
    background: linear-gradient(180deg, #f6ae54, rgba(255, 215, 160, 0.2));
    border-radius: 999px;
  }

  .nav.active {
    transform: translateX(0);
  }

  .nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .nav li {
    width: 100%;
  }

  .nav a {
    display: block;
    width: 100%;
    font-size: 22px;
    padding: 18px 18px 18px 22px;
    border-radius: 0;
  }

  .nav a::after {
    left: 22px;
    right: 0;
    bottom: 0;
    height: 1px;
    transform: scaleX(1);
    background: linear-gradient(90deg, rgba(246, 174, 84, 0.9), rgba(255, 215, 160, 0.15));
  }

  .nav a:hover {
    transform: none;
    background: rgba(255, 215, 160, 0.04);
  }

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

/* ===== スマホ ===== */
@media screen and (max-width: 680px) {
  .header {
    height: 80px;
  }

  .logo {
    left: 16px;
  }

  .logo img {
    height: 42px;
  }

  .hamburger {
    right: 16px;
    width: 34px;
    height: 26px;
  }

  .hamburger span:nth-child(1) {
    top: 0;
  }

  .hamburger span:nth-child(2) {
    top: 11px;
  }

  .hamburger span:nth-child(3) {
    top: 22px;
  }

  .hamburger.active span:nth-child(1),
  .hamburger.active span:nth-child(3) {
    top: 11px;
  }

  .nav {
    top: 80px;
    width: min(340px, 88vw);
    height: calc(100svh - 80px);
    padding: 22px 16px;
  }

  .nav::before {
    top: 18px;
    bottom: 18px;
  }

  .nav a {
    font-size: 18px;
    padding: 16px 14px 16px 18px;
  }

  .nav a::after {
    left: 18px;
  }

  .kyoen-page {
    padding-top: 80px;
  }

  .kyoen-hero {
    padding: 50px 16px 34px;
  }

  .kyoen-line {
    width: 100px;
    margin-bottom: 22px;
  }

  .kyoen-kicker {
    font-size: 11px;
    letter-spacing: 0.18em;
    margin-bottom: 14px;
  }

  .kyoen-hero h2 {
    margin-bottom: 10px;
  }

  .kyoen-sub {
    margin-bottom: 12px;
    font-size: 13px;
    line-height: 1.7;
    letter-spacing: 0.08em;
  }

  .kyoen-meta {
    margin-bottom: 18px;
    font-size: 12px;
  }

  .kyoen-lead {
    font-size: 14px;
  }

  .kyoen-section {
    padding: 0 16px 22px;
  }

  .kyoen-info-card,
  .schedule-card,
  .back-card {
    padding: 24px 20px;
    border-radius: 22px;
  }

  .kyoen-info-card h3,
  .schedule-card h3 {
    margin-bottom: 16px;
  }

  .section-label {
    margin-bottom: 14px;
    font-size: 12px;
    padding: 7px 13px;
  }

  .info-item {
    padding: 16px 16px;
    border-radius: 16px;
  }

  .info-head {
    font-size: 12px;
  }

  .info-body {
    font-size: 17px;
  }

  .notice-box {
    padding: 14px 16px;
    border-radius: 16px;
  }

  .notice-box p {
    font-size: 12px;
    line-height: 1.8;
    letter-spacing: 0.01em;
  }

  .schedule-placeholder {
    min-height: 240px;
    border-radius: 18px;
    padding: 28px 16px;
  }

  .placeholder-main {
    font-size: 24px;
  }

  .placeholder-sub {
    font-size: 14px;
  }

  .schedule-image-wrap {
    border-radius: 18px;
  }

  .back-btn {
    width: 100%;
    min-width: 0;
    height: 50px;
  }

  .footer {
    padding: 70px 16px 28px;
  }

  .footer-top-line {
    margin-bottom: 28px;
  }

  .footer-subtitle {
    font-size: 12px;
    letter-spacing: 0.1em;
    margin-bottom: 26px;
    line-height: 1.8;
  }

  .footer-nav {
    gap: 14px 18px;
    margin-bottom: 28px;
  }

  .footer-nav a {
    font-size: 15px;
  }

  .footer-info p:first-child {
    font-size: 16px;
  }

  .footer-info p:last-child {
    font-size: 11px;
  }

  .footer-copy {
    font-size: 11px;
  }
}