@charset "utf-8";

/* CSS変数定義 */
:root {
  /* カラー */
  --color-primary-blue: #40CCED;
  --color-primary-green: #C8E01E;
  --color-white: #efefef;
  --color-black: #101010;
  --color-gray: #555;
  --color-gray-light: #e0e0e0;
  --color-link-hover: #007bff;
  
  /* グラデーション */
  --gradient-horizontal: linear-gradient(to right, var(--color-primary-blue), var(--color-primary-green));
  --gradient-vertical: linear-gradient(to bottom, var(--color-primary-blue), var(--color-primary-green));
  --gradient-diagonal: linear-gradient(135deg, var(--color-primary-blue), var(--color-primary-green));
  --gradient-fade: linear-gradient(90deg, rgba(64, 204, 237, 0.1), rgba(200, 224, 30, 0.1));
  
  /* スペーシング */
  --spacing-page-top: 80px;
  --spacing-page-bottom: 40px;
  --spacing-page-horizontal: 200px;
  --spacing-page-horizontal-mobile: 20px;
  --spacing-section: 20px 50px;
  
  /* ボーダー */
  --border-gradient-width: 3px;
  
  /* ブレークポイント */
  --breakpoint-tablet: 1000px;
  --breakpoint-mobile: 768px;
}

/* 全体 */
body {
  background-color: var(--color-white);
  margin: 0;
  padding: 0;
  font-family: "Arial","Hiragino Kaku Gothic ProN","ヒラギノ角ゴ ProN","Meiryo","メイリオ",sans-serif;
}

header {
  background-color: var(--color-white);
  height: 120px;
  display: flex;
  border-bottom: var(--border-gradient-width) solid transparent;
  border-image: var(--gradient-horizontal);
  border-image-slice: 1;
}

footer {
  margin-top: 50px;
  background: gray;
  text-align: center;
  padding: 20px 0;
}

footer .footer-content {
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.social-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.social-links a {
  color: var(--color-white);
  transition: opacity 0.3s ease, transform 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.social-links a:hover {
  opacity: 0.7;
  transform: translateY(-2px);
}

.social-links svg {
  width: 24px;
  height: 24px;
}

footer p {
  margin: 0;
  color: var(--color-white);
}

/* ロゴ */
.logo-header {
  height: 100px;
  margin: 10px;
}

/* メニュー */
.text-menu {
  background-color: var(--color-white);
  margin: 20px 20px;
  margin-left: auto;
  font-size: 24px;
  display: flex;
  align-items: flex-end;
}

@media (max-width: 1000px) {
  .text-menu {
    display: none;
  }
}

@media (min-width: 1001px) {
  .hamburger-menu {
    display: none;
  }
}

.text-menu a {
  color: var(--color-black);
  margin: 5px 20px;
  text-decoration: none;
}

.text-menu a:hover {
  color: var(--color-link-hover);
}

.menu-icon {
  width: 40px;
  height: 30px;
  position: fixed;
  top: 20px;
  right: 20px;
  cursor: pointer;
  z-index: 3;
  display: inline-block;
}

.menu-icon span {
  display: block;
  height: 4px;
  margin: 6px 0;
  background: var(--color-black);
  border-radius: 2px;
  transition: 0.4s;
}

#menu-toggle:checked + .menu-icon span:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}

#menu-toggle:checked + .menu-icon span:nth-child(2) {
  opacity: 0;
}

#menu-toggle:checked + .menu-icon span:nth-child(3) {
  transform: translateY(-10px) rotate(-45deg);
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: 0.4s;
  z-index: 1;
}

#menu-toggle:checked ~ .overlay {
  opacity: 1;
  pointer-events: auto;
}

.hamburger-menu .menu-content {
  position: fixed;
  top: 0;
  right: -250px;
  width: 250px;
  height: 100%;
  background: var(--color-white);
  transition: 0.4s;
  z-index: 2;
}

#menu-toggle:checked ~ .menu-content {
  right: 0;
}

.hamburger-menu .menu-content ul {
  list-style: none;
  padding: 60px 20px;
  margin: 0;
}

.hamburger-menu .menu-content ul li {
  margin: 20px 0;
}

.hamburger-menu .menu-content a {
  text-decoration: none;
  color: var(--color-black);
  font-size: 24px;
}

.hamburger-menu .menu-content a:hover {
  color: var(--color-link-hover);
}

/* メイン */
/* スライド画像 */
.top-image {
  position: relative;
  top: 10px;
  width: 100%;
  height: calc(100vh - 120px);
  overflow: hidden;
}

.top-image .picture {
  position: absolute;
  width: 100%;
  height: calc(100vh - 120px);
  object-fit: cover;
  opacity: 0;
  animation: change-img-anim 15s infinite;
}

.top-image .picture:nth-of-type(1) {
  animation-delay: 0s;
}

.top-image .picture:nth-of-type(2) {
  animation-delay: 5s;
}

.top-image .picture:nth-of-type(3) {
  animation-delay: 10s;
}

@keyframes change-img-anim {
  0% { opacity: 0; }
  5% { opacity: 1; }
  33.33% { opacity: 1; }
  38.33% { opacity: 0; }
  100% { opacity: 0; }
}

/* 情報カード */
.card {
  position: absolute;
  top: 60%;
  right: 80px;
  height: 60%;
  width: 20%;
  min-width: 300px;
  max-height: 800px;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  box-shadow: 0 0 32px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.card .logo {
  max-width: 80%;
  height: auto;
  display: block;
  margin: 0 auto;
  max-height: 200px;
}

.card .divider {
  width: 60%;
  height: 3px;
  background: var(--gradient-horizontal);
  margin: 0 auto;
}

.card .card-info {
  margin: 30px 0;
}

.card .info-label {
  margin: 20px 0 10px 0;
  color: var(--color-white);
  font-size: clamp(12px, 1vw, 24px);
}

.card .info-content {
  color: var(--color-white);
  font-size: clamp(18px, 1.5vw, 36px);
  font-weight: 700;
  text-shadow: 1px 2px 4px rgba(0, 0, 0, 0.3);
  text-align: left;
}

.card-access {
  font-size: clamp(10px, 0.8vw, 20px);
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
}

/* ページタイトル */
.page-title {
  margin: var(--spacing-page-top) var(--spacing-page-horizontal) var(--spacing-page-bottom) var(--spacing-page-horizontal);
  padding-bottom: 20px;
  border-bottom: var(--border-gradient-width) solid transparent;
  border-image: var(--gradient-horizontal);
  border-image-slice: 1;
  font-size: 48px;
  text-align: center;
}

/* 共通クラス */
.coming-soon {
  padding: 200px 20px;
  text-align: center;
}

.gradient-border-bottom {
  border-bottom: var(--border-gradient-width) solid transparent;
  border-image: var(--gradient-horizontal);
  border-image-slice: 1;
}

/* 開催概要 */
.outline {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-section);
}

.outline .intro {
  text-align: center;
  margin-bottom: 80px;
}

.intro .title {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin-bottom: 20px;
  background: var(--gradient-horizontal);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.intro .text {
  font-size: clamp(16px, 2vw, 18px);
  color: var(--color-black);
  line-height: 1.8;
}

.outline .context {
  background: var(--color-white);
  border-radius: 16px;
  padding: 40px;
  margin-bottom: 40px;
  box-shadow: 2px 4px 16px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.outline .context::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--gradient-vertical);
}

.context .heading {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 700;
  color: var(--color-black);
  text-align: center;
  margin-bottom: 30px;
}

.context .list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.context .list li {
  font-size: clamp(16px, 2vw, 18px);
  color: var(--color-gray);
  padding: 15px 20px 15px 40px;
  margin-bottom: 10px;
  background: var(--gradient-fade);
  border-radius: 8px;
  position: relative;
}

.context .list li::before {
  content: "✓";
  position: absolute;
  left: 15px;
  color: var(--color-primary-blue);
  font-weight: 700;
  font-size: 20px;
}

.welcome {
  background: var(--gradient-diagonal);
  border-radius: 16px;
  padding: 50px 40px;
  text-align: center;
  margin-top: 60px;
  box-shadow: 2px 4px 24px rgba(64, 204, 237, 0.3);
}

.welcome .title {
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 20px;
}

.welcome .text {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--color-white);
  line-height: 1.8;
}

/* アクセスページ */
.access {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--spacing-section);
}

.access .access-info {
  background: var(--color-white);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 2px 4px 16px rgba(0, 0, 0, 0.1);
  max-width: 600px;
  margin: 0 auto 60px auto;
}

.access .venue {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 30px;
  border-bottom: var(--border-gradient-width) solid transparent;
  border-image: var(--gradient-horizontal);
  border-image-slice: 1;
}

.venue .venue-name {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--color-black);
  cursor: pointer;
  transition: transform 0.3s ease, color 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.venue .venue-name:hover {
  transform: translateY(-3px);
  color: var(--color-primary-blue);
}

.venue .venue-name:hover::after {
  opacity: 1;
  transform: rotate(15deg);
}

.venue .address {
  font-size: clamp(14px, 1.5vw, 18px);
  color: var(--color-gray);
}

.transportation {
  max-width: 400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.station {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-gray-light);
}

.station:last-child {
  border-bottom: none;
}

.station .station-name {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-black);
}

.station .time {
  font-size: 16px;
  color: #606060;
}

.access .access-map {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 2px 4px 16px rgba(0, 0, 0, 0.1);
  margin-bottom: 60px;
}

/* レスポンシブ */
@media (max-width: 768px) {
  .page-title {
    margin: var(--spacing-page-top) var(--spacing-page-horizontal-mobile) var(--spacing-page-bottom) var(--spacing-page-horizontal-mobile);
  }
  
  .outline,
  .access {
    padding: 0 15px;
  }
  
  .outline .context,
  .welcome {
    padding: 30px 20px;
  }
}