/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px; /* ベースフォントサイズを設定 */
}

body {
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.6;
  color: #fff;
  background: linear-gradient(to bottom, #000000, #000a1f, #001c40);
  position: relative;
  overflow-x: hidden;
  min-height: 100vh; /* 最小高さを設定 */
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block; /* 画像の下の余白を防ぐ */
}

/* Cosmic Background */
.stars,
.twinkling {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.stars {
  background: #000 url("https://i.imgur.com/YKY28eT.png") repeat top center;
  z-index: 0;
}

.twinkling {
  background: transparent url("https://i.imgur.com/XYMF4ca.png") repeat top center;
  z-index: 1;
  animation: move-twink-back 200s linear infinite;
}

@keyframes move-twink-back {
  from {
    background-position: 0 0;
  }
  to {
    background-position: -10000px 5000px;
  }
}

.cosmic-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
}

.cosmic-particles::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* Utility Classes */
.glow-text {
  color: #60a5fa;
  text-shadow: 0 0 10px rgba(96, 165, 250, 0.7);
}

.bg-dark {
  background: linear-gradient(to bottom, rgba(0, 10, 31, 0.8), rgba(0, 28, 64, 0.8));
  position: relative;
  z-index: 2;
}

.icon {
  vertical-align: middle;
  margin-left: 5px;
}

.icon-glow {
  stroke: #60a5fa;
  filter: drop-shadow(0 0 5px rgba(96, 165, 250, 0.7));
}

.cosmic-border {
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: 8px;
  box-shadow: 0 0 15px rgba(96, 165, 250, 0.2);
  overflow: hidden;
  position: relative;
}

.cosmic-border::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, #60a5fa, transparent, #60a5fa, transparent);
  background-size: 400% 400%;
  animation: cosmic-border 6s linear infinite;
  z-index: -1;
  border-radius: 10px;
  opacity: 0.5;
}

@keyframes cosmic-border {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  border-radius: 9999px;
  font-weight: bold;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #1e40af);
  color: white;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb, #1e3a8a);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.7);
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover::after {
  opacity: 0.2;
}

/* Header Styles */
.header {
  position: sticky;
  top: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(96, 165, 250, 0.2);
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: bold;
  font-size: 1.25rem;
  z-index: 15; /* ハンバーガーメニュー表示時にも見えるようにする */
}

/* ハンバーガーメニュー */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 15; /* ナビゲーションより上に表示 */
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #60a5fa;
  border-radius: 3px;
  transition: all 0.3s ease;
  box-shadow: 0 0 5px rgba(96, 165, 250, 0.7);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.nav ul {
  display: flex;
  gap: 24px;
}

.nav a {
  position: relative;
  padding: 5px 0;
}

.nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, #60a5fa, transparent);
  transition: width 0.3s;
}

.nav a:hover {
  color: #60a5fa;
}

.nav a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 500px; /* 最小高さを設定 */
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("https://placehold.co/1920x1080/000a1f/FFFFFF/png?text=AERISE");
  background-size: contain; /* coverからcontainに変更 */
  background-position: center;
  background-repeat: no-repeat; /* 背景画像の繰り返しを防止 */
  opacity: 0.4;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 背景テキストのレスポンシブ対応を追加 */
.hero-bg::before {
  content: "AERISE";
  position: absolute;
  color: rgba(255, 255, 255, 0.1);
  font-size: clamp(5rem, 20vw, 20rem); /* レスポンシブフォントサイズ */
  font-weight: 900;
  letter-spacing: 0.5rem;
  text-transform: uppercase;
  white-space: nowrap;
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(to bottom, transparent, #000a1f);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  width: 100%;
  padding: 0 20px;
}

.cosmic-title {
  position: relative;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 4rem); /* レスポンシブフォントサイズ */
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.orbit-line {
  width: min(300px, 80vw); /* 最大幅を設定 */
  height: 2px;
  background: linear-gradient(to right, transparent, #60a5fa, transparent);
  margin: 0 auto;
  position: relative;
}

.orbit-line::before,
.orbit-line::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #60a5fa;
  top: -2px;
  animation: orbit 8s linear infinite;
}

.orbit-line::before {
  animation-delay: -4s;
}

@keyframes orbit {
  0% {
    left: 0;
    box-shadow: 0 0 10px #60a5fa;
  }
  50% {
    left: 100%;
    box-shadow: 0 0 20px #60a5fa;
  }
  100% {
    left: 0;
    box-shadow: 0 0 10px #60a5fa;
  }
}

.hero p {
  font-size: clamp(1rem, 3vw, 1.5rem); /* レスポンシブフォントサイズ */
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

/* Section Styles */
.section {
  padding: 4rem 0; /* パディングを調整 */
  position: relative;
  z-index: 2;
}

.section-title {
  font-size: clamp(1.5rem, 4vw, 2rem); /* レスポンシブフォントサイズ */
  text-align: center;
  margin-bottom: 3rem;
}

.section-title span {
  border-bottom: 4px solid #60a5fa;
  padding-bottom: 0.5rem;
  position: relative;
}

.section-title span::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 4px;
  background: #60a5fa;
  box-shadow: 0 0 10px #60a5fa;
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.about-grid p {
  margin-bottom: 1.5rem;
  font-size: clamp(0.9rem, 2vw, 1.125rem); /* レスポンシブフォントサイズ */
  line-height: 1.8;
}

.about-image {
  height: auto; /* 高さを自動に変更 */
  max-height: 20rem;
  border-radius: 0.5rem;
  overflow: hidden;
  position: relative;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-image::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, rgba(0, 10, 31, 0.3), transparent);
}

/* Activities Section */
.activities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); /* 幅を調整 */
  gap: 1.5rem; /* ギャップを調整 */
}

.activity-card {
  background: rgba(0, 28, 64, 0.5);
  padding: 1.5rem;
  border-radius: 0.5rem;
  transition: transform 0.3s, box-shadow 0.3s;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(96, 165, 250, 0.2);
  height: 100%; /* カードの高さを揃える */
  display: flex;
  flex-direction: column;
}

.activity-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3), 0 0 15px rgba(96, 165, 250, 0.3);
}

.activity-icon {
  width: 4rem;
  height: 4rem;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  position: relative;
}

.activity-icon::after {
  content: "";
  position: absolute;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
  border-radius: 50%;
  border: 1px solid rgba(96, 165, 250, 0.3);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.3);
    opacity: 0;
  }
}

.activity-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: #60a5fa;
}

.activity-card p {
  margin-top: auto; /* 説明文を下に配置 */
}

/* Events Section */
.events-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.event-card {
  background: rgba(0, 28, 64, 0.5);
  border-radius: 0.5rem;
  padding: 1.5rem;
  display: flex;
  gap: 1.5rem;
  border: 1px solid rgba(96, 165, 250, 0.2);
  backdrop-filter: blur(5px);
  transition: transform 0.3s;
  flex-wrap: wrap; /* スマホ表示時に折り返し */
}

.event-card:hover {
  transform: translateX(10px);
}

.event-date {
  background: rgba(0, 0, 0, 0.5);
  padding: 1rem;
  border-radius: 0.5rem;
  text-align: center;
  min-width: 6rem;
  border: 1px solid rgba(96, 165, 250, 0.3);
  margin-bottom: 1rem; /* スマホ表示時の余白 */
}

.event-day {
  display: block;
  font-size: 2rem;
  font-weight: bold;
}

.event-month {
  color: #60a5fa;
  text-shadow: 0 0 5px rgba(96, 165, 250, 0.7);
}

.event-details {
  flex: 1;
  min-width: 200px; /* 最小幅を設定 */
}

.event-details h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: #60a5fa;
}

.event-details p {
  margin-bottom: 1rem;
  color: #cbd5e1;
}

.event-time {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #60a5fa;
}

/* Members Section */
.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); /* 幅を調整 */
  gap: 1.5rem; /* ギャップを調整 */
}

.member-card {
  text-align: center;
  transition: transform 0.3s;
  margin-bottom: 1rem;
}

.member-card:hover {
  transform: translateY(-10px);
}

.member-image {
  width: 8rem; /* サイズを調整 */
  height: 8rem;
  max-width: 100%;
  border-radius: 9999px;
  overflow: hidden;
  margin: 0 auto 1rem;
}

.member-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.member-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.contact-grid p {
  font-size: clamp(0.9rem, 2vw, 1.125rem); /* レスポンシブフォントサイズ */
  margin-bottom: 1.5rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap; /* 長いテキストの折り返し */
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.5rem; /* パディングを調整 */
  background: rgba(0, 10, 31, 0.5);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  border-radius: 0.5rem;
}

/* 問い合わせフォームのグラデーションアニメーション */
.cosmic-gradient::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    rgba(96, 165, 250, 0.1),
    rgba(96, 165, 250, 0.2),
    rgba(59, 130, 246, 0.1),
    rgba(37, 99, 235, 0.2)
  );
  background-size: 400% 400%;
  animation: gradient-shift 15s ease infinite;
  z-index: -1;
  border-radius: 0.5rem;
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  padding: 0.75rem 1rem;
  background: rgba(0, 28, 64, 0.5);
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: 0.375rem;
  color: white;
  font-family: inherit;
  transition: border-color 0.3s, box-shadow 0.3s;
  width: 100%; /* 幅を100%に */
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #60a5fa;
  box-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
}

/* クリック時の神秘的な演出 */
.cosmic-btn {
  position: relative;
  overflow: hidden;
}

.cosmic-btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.8) 0%, transparent 80%);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  opacity: 0;
  transition: width 0.5s ease-out, height 0.5s ease-out, opacity 0.5s ease-out;
  z-index: 0;
}

.cosmic-btn:active::before {
  width: 300px;
  height: 300px;
  opacity: 0.3;
  transition: width 0.2s ease-out, height 0.2s ease-out, opacity 0.1s ease-in;
}

.cosmic-btn span {
  position: relative;
  z-index: 1;
}

/* Footer */
.footer {
  background: rgba(0, 0, 0, 0.7);
  border-top: 1px solid rgba(96, 165, 250, 0.2);
  padding: 2rem 0;
  position: relative;
  z-index: 2;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.copyright {
  color: #94a3b8;
  font-size: 0.875rem;
}

/* SNSアイコンのスタイル改善 */
.social-links {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 16px;
  justify-content: center;
}

.social-links li {
  display: inline-block;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 10, 31, 0.5);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, #3b82f6, #1e40af);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.social-link:hover::before {
  opacity: 1;
}

.social-icon {
  position: relative;
  z-index: 1;
  stroke: #60a5fa;
  transition: all 0.3s ease;
}

.social-link:hover .social-icon {
  stroke: #ffffff;
  transform: scale(1.1);
}

/* タッチデバイス対応 */
@media (hover: none) {
  .activity-card:hover,
  .member-card:hover,
  .event-card:hover {
    transform: none;
  }

  .nav a:hover::after {
    width: 0;
  }

  .social-link:active::before {
    opacity: 1;
  }

  .social-link:active .social-icon {
    stroke: #ffffff;
  }
}

/* Media Queries */
/* 小さいモバイル端末 */
@media (max-width: 480px) {
  html {
    font-size: 14px; /* ベースフォントサイズを小さく */
  }

  .container {
    padding: 0 15px;
  }

  .section {
    padding: 3rem 0;
  }

  .hero {
    min-height: 450px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .event-date {
    min-width: 5rem;
  }

  .event-day {
    font-size: 1.5rem;
  }

  .member-image {
    width: 6rem;
    height: 6rem;
  }
}

/* モバイル端末 */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: rgba(0, 10, 31, 0.95);
    backdrop-filter: blur(10px);
    padding: 80px 20px 20px;
    transition: right 0.3s ease;
    z-index: 10;
    border-left: 1px solid rgba(96, 165, 250, 0.2);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.3);
  }

  .nav.active {
    right: 0;
  }

  .nav ul {
    flex-direction: column;
    gap: 20px;
  }

  .nav a {
    display: block;
    font-size: 1.2rem;
    padding: 10px 0;
  }

  .event-card {
    flex-direction: column;
  }

  .event-date {
    margin-right: auto;
  }

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

  .members-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }

  /* メニュー開いた時に背景スクロールを防止 */
  body.menu-open {
    overflow: hidden;
  }
}

/* タブレット */
@media (min-width: 769px) and (max-width: 1024px) {
  .activities-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }

  .members-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* デスクトップ */
@media (min-width: 1025px) {
  .hero h1 {
    font-size: 4rem;
  }

  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .activities-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }
}

/* 高解像度ディスプレイ */
@media (min-width: 1440px) {
  html {
    font-size: 18px; /* ベースフォントサイズを大きく */
  }

  .container {
    max-width: 1400px;
  }
}

/* 印刷用スタイル */
@media print {
  .stars,
  .twinkling,
  .cosmic-particles {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    page-break-inside: avoid;
  }
}