/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Kantumruy Pro', sans-serif;
    color: white;
    background-color: black;
    line-height: 1.6;
  }

  body::-webkit-scrollbar {
    display: none;
  }
  
  /* Navbar */
  header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
  }
  
  /* Hero Section */
  .hero {
    height: 100vh;
    width: 100%;
    /* background: url('../images/home2025/main03.webp') center/cover no-repeat; */
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }
  
  /* 네비게이션 */
  .navbar {
    position: absolute;
    top: 0;
    width: 100%;
    padding: 2rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .navbar .logo > a {
    text-decoration: none;
    font-weight: 600;
    font-size: 2rem;
    color: #ffffff;
  }
  
  .navbar ul {
    list-style: none;
    display: flex;
    gap: 45px;
  }

  .navbar ul li {
    position: relative;
  }

  .navbar ul li > a {
    text-decoration: none;
    color: #ffffff;
    font-size: 1rem;
    font-weight: 200;
    transition: color 0.3s;
  }

  .navbar ul li > a:hover {
    color: #b5ff4c;
  }

/* ===================== */
/* 데스크톱 서브메뉴 애니메이션 */
/* ===================== */
  .navbar ul li ul {
    display: block;              /* 항상 공간을 차지하게 */
    opacity: 0;                  /* 투명하게 */
    visibility: hidden;          /* 보이지 않게 */
    position: absolute;
    top: 100%;                 /* 상위 메뉴 바로 아래 */
    left: 50%;                 /* 부모 기준 가운데 */
    transform: translateX(-50%); /* 가운데 정렬 */
    background: rgba(255, 255, 255, 0.1); /* 투명한 유리 느낌 */
    backdrop-filter: blur(10px);          /* 블러 처리 */
    -webkit-backdrop-filter: blur(10px);  /* Safari 지원 */
    padding: 0;
    margin-top: 10px;
    list-style: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    min-width: 120px;          
    text-align: center;        
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .navbar ul li:hover ul {
    opacity: 1;
    visibility: visible;
  }
  
  .navbar ul li ul li {
    display: block;
  }

  .navbar ul li ul li a {
    display: block;
    padding: 8px 20px;
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 100;
    text-decoration: none;
    transition: background-color 0.3s;
  }
  
  .navbar ul li ul li a:hover {
    color: #b5ff4c;
  }

/* ===================== */
/* ------ 햄버거 버튼 ----- */
/* ===================== */
  .hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
  }
  
  .hamburger span {
    height: 3px;
    width: 25px;
    background: #ffffff;
    border-radius: 2px;
    transition: all 0.3s;
  }
  
/* ===================== */
/* ----- 모바일 반응형 ---- */
/* ===================== */
  @media (max-width: 1300px) {
    .navbar {
      padding: 1rem;
    }

    .nav-links {
      position: absolute;
      top: 100px;
      right: 0;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      flex-direction: column;
      width: 100%;
      transform: translateX(100%);
      transition: transform 0.3s ease-in-out;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    
    .nav-links.active {
      transform: translateX(0);
    }
    
    .hamburger {
      display: flex;
    }

    .navbar ul {
      margin: 0;
      padding: 0;
      gap: 0;
    }

    .navbar ul li {
      margin: 0;
      padding: 1rem;
      list-style: none; /* 기본 점 제거 */
      position: relative; /* 부모 기준 */
      /* border: 1px solid #000000; */
    }

    .navbar ul li ul {
      display: none; /* 기본 숨김 */
      flex-direction: column;
      width: 100%;
      background: rgba(255, 255, 255, 1);
      backdrop-filter: blur(10px);
      border-radius: 8px;
      z-index: 10;
      margin: 0;
      padding: 0;
      gap: 0;
    }

    /* 열렸을 때 */
    .navbar ul li ul.active {
      display: flex;
    }

    .navbar ul li ul li {
      margin: 0;
      padding: 0;
      list-style: none; /* 기본 점 제거 */
      border: 1px solid rgba(255, 255, 255, 0.3);
    }   

    .navbar ul li ul li > a {
        color: #000000;
    }
  }

  /* 클릭 시 X 모양 */
  .hamburger.toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .hamburger.toggle span:nth-child(2) {
    opacity: 0;
  }
  .hamburger.toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }





/* ===================== */
/* 중앙 Glass 카드 */
/* ===================== */
  .glass-link {
    text-decoration: none;
  }

  .glass-card {
    width: 600px;
    height: 400px;
    max-width: 600px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;

    position: relative;
  }

  /* Hover 시 빛나는 효과 */
  .glass-card:hover {
    box-shadow: 0 0 30px #ffffff;
    transform: scale(1.03);
  }
  
  /* 클릭 순간 효과 */
  .glass-card:active {
    box-shadow: 0 0 40px rgba(181, 255, 76, 1);
    transform: scale(0.98);
  }
  
  /* 텍스트 스타일 */
  .glass-card .glass-card-main-text h1.glass-card-main-text-h1 {
    font-size: 3.5rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #b5ff4c !important;
  }
  
  .glass-card .glass-card-main-text p.glass-card-main-text-p {
    font-size: 1rem;
    font-weight: 400;
    color: #b5ff4c;
    letter-spacing: 3px !important;
  }

  .glass-card .glass-card-p2 {
    font-size: 0.8rem;
    font-weight: 100;
    color: #ffffff !important;
    position: absolute; /* 절대 위치 지정 */
    bottom: 10%;
    text-align: center;
  }

  /* 버튼 스타일 */
  .glass-btn {
    margin-top: 30px;
    padding: 12px 30px;
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.3s ease;
  }
  
  .glass-btn:hover {
    background: #b5ff4c;
    color: #000;
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(181, 255, 76, 0.4);
  }
  
/* ===================== */
/* 모바일 반응형 추가 CSS */
/* ===================== */
  @media (max-width: 1300px) {
    .glass-card {
      width: 500px;
      height: 500px;
    }
  }

  @media (max-width: 768px) {
    .glass-card {
      width: 400px;
      height: 400px;
    }

    .glass-card h1 {
      font-size: 2.5rem;
    }

    .glass-card p {
      font-size: 0.8rem;
    }

    .glass-card .glass-card-p2 {
      font-size: 0.8rem;
    }
  }

  @media (max-width: 600px) {
    .glass-card {
      width: 300px;
      height: 300px;
    }
  }

  @media (max-width: 500px) {
    .glass-card {
      width: 200px;
      height: 200px;
    }

    .glass-card h1 {
      font-size: 1.8rem;
    }

    .glass-card p {
      font-size: 0.6rem;
    }

    .glass-card .glass-card-p2 {
      font-size: 0.6rem;
    }
  }

  /* 화면 높이가 000px 이하일 때 */
  @media (max-height: 800px) {
    .glass-card {
      width: 400px;
      height: 400px;
    }

    .glass-card h1 {
      font-size: 2.5rem;
    }

    .glass-card p {
      font-size: 0.8rem;
    }

    .glass-card .glass-card-p2 {
      font-size: 0.8rem;
    }
  }

  @media (max-height: 600px) {
    .glass-card {
      width: 300px;
      height: 300px;
    }
  }

  @media (max-height: 500px) {
    .glass-card {
      width: 200px;
      height: 200px;
    }

    .glass-card h1 {
      font-size: 1.8rem;
    }

    .glass-card p {
      font-size: 0.6rem;
    }

    .glass-card .glass-card-p2 {
      font-size: 0.6rem;
    }
  }



/* ===================== */
/* Verse Section */
/* ===================== */
  .verse {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100vh;
    /* background: url('../images/home2025/main02.webp') center/cover no-repeat; */
  }
  
  .verse-text {
    flex: 1;
    font-size: 1rem;
    font-weight: 400;
    line-height: 2;
    margin-left: 4rem;
  }
  
 .verse-right {
    flex: 0 0 25%;
    width: 25%;
    text-align: right;
    /* background: rgba(0, 0, 0, 0.6); 검은색 반투명 */
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    box-sizing: border-box;
  }

  /* 안쪽 텍스트 박스 */
  .verse-right .text-box {
    text-align: center;
  }
  
  .verse-right h1 {
    font-size: 3.5rem;
    font-weight: 600;
    color: #b5ff4c;
  }

/* ===================== */
/* 모바일 반응형 추가 CSS */
/* ===================== */
  @media (max-width: 1300px) {
    .verse-right h1 {
      font-size: 2.5rem;
    }
    
  }

  @media (max-width: 768px) {
    .verse {
      flex-direction: column;
      padding: 1rem;
    }

    .verse-text {
      display: flex;
      justify-content: center;
      align-items: center;
      margin-left: 0;
      font-size: 0.8rem;
    }

    .verse-text p {
      text-align: center;
    }

    .verse-right {
      flex: 0 0 50%;
      width: 100%;
      background: none;
      backdrop-filter: none;
    }

    .verse-right h1 {
      font-size: 2.5rem;
    }
  }
  


/* ===================== */
/* Conference Info */
/* ===================== */
  .conference {
    height: 100vh;
    /* background: url('../images/home2025/main03.webp') center/cover no-repeat; */
    display: flex;
    align-items: center;
  }
  
  .conference-text {
    width: 33.33%;
    /* background: rgba(0, 0, 0, 0.6); 검은색 반투명*/
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 2rem 2rem 4rem;
    box-sizing: border-box;
    text-decoration: none;
  }

  .conference-text h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #b5ff4c;
    margin-bottom: 1rem;
  }
  
  .conference-text p {
    font-size: 1rem;
    font-weight: 300;
    color: #ffffff;
    margin: 1rem 0;
    line-height: 2rem;
  }

  .register-btn {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 0.8rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
  }
  
  .register-btn:hover {
    color: #ffffff;
    box-shadow: 0 0 30px #ffffff;
    transform: scale(1.03);
  }
  
  .register-btn:active {
    color: #b5ff4c;
    box-shadow: 0 0 40px #b5ff4c;
    transform: scale(0.98);
  }
  
/* ===================== */
/* 모바일 반응형 추가 CSS */
/* ===================== */
  @media (max-width: 1300px) {
    .conference-text {
      width: 40%;
    }

    .conference-text h2 {
      font-size: 1.5rem;
    }
  
    .conference-text p {
      font-size: 0.8rem;
    }
  }

  @media (max-width: 768px) {
    .conference-text {
      width: 100%;
      padding: 2rem 1rem;
    }

    .conference-text h2 {
      font-size: 1.5rem;
    }

    .conference-text p {
      font-size: 0.8rem;
    }
  }



/* ===================== */
/* Video Section */
/* ===================== */
  .video-section {
    height: 100vh;
    /* background: url('../images/home2025/main05.webp') center/cover no-repeat; */
  }

  .video-glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;           /* 모바일 여백 확보 */
    box-sizing: border-box;
  }
  
  .video-container {
    width: 100%;
    max-width: 900px;
    aspect-ratio: 16 / 9;
    margin-bottom: 2rem;
  }
  
  .video-container iframe {
    width: 100%;
    height: 100%;
    border: none;
  }
  
  .video-description {
    max-width: 900px;
    text-align: left;
  }
  
  .video-description p {
    font-size: 1rem;
    font-weight: 300;
    line-height: 2rem;
    color: #ffffff;
  }

/* ===================== */
/* 모바일 반응형 추가 CSS */
/* ===================== */
  @media (max-width: 768px) {
    .video-glass {
      padding: 2rem 1rem;
    }

    .video-description p {
      font-size: 0.8rem;
    }
  }



/* ===================== */
/* Footer Section */
/* ===================== */
  .site-footer {
    background-color: #1e1e1e;
    color: #ffffff;
  }
  
  .footer-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 4rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
  }
  
  .footer-about {
    flex: 1 1 300px;
    margin-right: 2rem;
  }
  
  .footer-about .footer-logo {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 1rem;
  }
  
  .footer-about p {
    line-height: 1.6;
    font-size: 0.8rem;
    font-weight: 100;
    max-width: 300px;
  }
  
  .footer-column {
    flex: 1 1 150px;
    margin-bottom: 2rem;
  }
  
  .footer-column h3 {
    font-size: 1rem;
    font-weight: 300;
    margin-bottom: 1rem;
  }
  
  .footer-column ul {
    list-style: none;
    padding: 0;
  }
  
  .footer-column ul li {
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
    font-weight: 100;
  }
  
  .contact-info li {
    display: flex;
    align-items: center;
  }

  .footer-column ul li a,
  .footer-about p a,
  .contact-info li a {
    color: inherit;
    text-decoration: none;
  }

  .footer-column ul li a:hover,
  .footer-about p a:hover,
  .contact-info li a:hover {
    text-decoration: none;
    color: #b5ff4c;
  }
  
  .footer-bottom {
    text-align: center;
    padding: 1rem 0;
    font-size: 0.8rem;
  }
  
/* ===================== */
/* 모바일 반응형 추가 CSS */
/* ===================== */
  @media (max-width: 768px) {
    .footer-container {
      /* flex-direction: column; */
      padding: 2rem 1rem;
    }
  
    .footer-about {
      margin-right: 0;
      margin-bottom: 1.5rem;
    }
  
    .footer-about .footer-logo {
      font-size: 1.5rem;
    }
  
    .footer-about p {
      font-size: 0.8rem;
      max-width: 100%;
    }
  
    .footer-column {
      flex: 1 1 100%;
      margin-bottom: 1.5rem;
    }
  
    .footer-column h3 {
      font-size: 1rem;
    }
  
    .footer-column ul li {
      font-size: 0.8rem;
      margin-bottom: 0.4rem;
    }
  
    .footer-bottom {
      font-size: 0.7rem;
      padding: 0.7rem;
    }
  }



/* ===================== */
/* 화면 높이가 800px 이하일 때 */
/* ===================== */
  @media (max-height: 800px) {
    .hero {
      height: 80vh; /* 전체 화면보다 조금 작게 */
    }
  
    .verse, .conference, .video-section {
      height: auto; /* 고정 높이 대신 내용에 맞춤 */
      /* padding: 2rem 1rem; */
    }
  
    .verse-text {
      font-size: 0.8rem;
    }
  
    .conference-text h2 {
      font-size: 1.5rem;
    }
  }