:root {
    --main-bg: #f8f9fa;
    --primary: #4a90e2;
    --accent: #fdd835;
    --text-color: #333;
    --card-bg: #ffffff;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Quicksand', sans-serif;
    background-color: var(--main-bg);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    background: linear-gradient(to right, var(--primary), #6bb4f3);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.8rem;
}

/* 하이퍼링크 CSS */
div[class="footer-header"] {
    color: gray;
}
a {
    text-decoration: none;
}
a[id="openTerms"] {
    text-decoration: none;
    color: gray;
}
a[id="openPrivate"] {
    text-decoration: none;
    color: gray;
}
.text-decoration {
    text-decoration: none;
    color: white;
}

.fieldError {
    color: #bd2130;
}
.error {
    color: #bd2130;
}

table {
    border-collapse: collapse;
}
tr, td {
    border: solid 1px black;
    text-align: center;
    font-size: 0.7em;
}

.menu-toggle {
    font-size: 1.8rem;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    display: none;
    z-index: 1001;
}

nav {
    display: flex;
    gap: 20px;
}

/* nav + 버튼 감싸는 영역 스타일 */
.navbar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

nav a {
    color: white;
    font-weight: 600;
    text-decoration: none;
}

/* 슬라이드 메뉴 (모바일용) */
.side-nav {
    position: fixed;
    top: 0;
    right: -250px;
    width: 250px;
    height: 100%;
    background-color: var(--primary);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: right 0.3s ease;
    z-index: 1000;
}

.side-nav a {
    color: white;
    font-weight: 600;
    text-decoration: none;
}

.side-nav.active {
    right: 0;
}

main {
    padding: 40px 20px;
    display: grid;
    gap: 30px;
    max-width: 1000px;
    margin: auto;
}

.board-section {
    margin-bottom: 40px;
    transition: transform 0.2s ease;
}

.board-section h2 {
    color: var(--primary);
    margin-top: 15px;
}

.post-list {
    border: 1px solid #ddd;
    border-radius: 10px;
    overflow: hidden;
    background-color: white;
    box-shadow: 0 4px 10px var(--shadow);
}

/* 게시글 hover 효과 (개별 적용) */
  .post {
      display: flex;
      justify-content: space-between;
      padding: 12px 16px;
      border-bottom: 1px solid #eee;
      transition: transform 0.2s ease, background-color 0.2s ease;
      cursor: pointer;
  }

  .post:hover {
      transform: translateY(-3px);
      background-color: #f5faff;
  }

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

  .post-title {
    font-weight: 600;
  }

  .post-meta {
    font-size: 0.85rem;
    color: #777;
  }

  .header-actions {
      display: flex;
      gap: 10px;
      align-items: center;
  }

  .btn {
      padding: 6px 12px;
      border: none;
      border-radius: 6px;
      font-weight: 600;
      font-family: inherit;
      cursor: pointer;
      transition: background-color 0.2s ease;
  }

  .btn-login {
      background-color: #d0f0c0; /* 연한 초록 */
      color: #2d7032;
  }

  .btn-login:hover {
      background-color: #c0e8b0;
  }

  .btn-signup {
      background-color: #fcdede; /* 연한 빨강 */
      color: #b00020;
  }

  .btn-signup:hover {
      background-color: #f9caca;
  }

  .btn-signup:disabled {
      background-color: #cccccc;
      cursor: not-allowed;
  }

  .btn-write {
      background-color: #e0ecff;
      color: #2f4f99;
      margin-top: 15px;
  }

  .btn-write:hover {
      background-color: #d0e0ff;
  }

  .btn-detail {
      background-color: #d0f0c0; /* 연한 초록 */
      color: #2d7032;
      margin-top: 15px;
  }

  /* a 태그로 된 버튼들도 버튼처럼 보이게 통일 */
  a.btn-write, a.btn-detail {
    display: inline-block;
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-family: inherit;
    background-color: #e0ecff; /* 기본 btn-write 색 */
    color: #2f4f99;
    margin-top: 15px;
    text-align: center;
    line-height: normal;
    font-size: 0.85em;
  }

  a.btn-write:hover {
    background-color: #d0e0ff;
  }

  a.btn-detail {
    background-color: #d0f0c0; /* 기본 btn-detail 색 */
    color: #2d7032;
  }

  a.btn-detail:hover {
    background-color: #c0e8b0;
  }

  .id-box {
    display: flex;
    gap: 10px;
  }

  .id-check-box {
    flex:1;
  }

  .id-check-comment {
    color:red;
    display:none;
  }
 
  .ps-check-comment {
    color:red;
    display:none;
  }

  .btn-detail:hover {
      background-color: #c0e8b0;
  }

  .btn-check {
    background-color: #d0f0c0;
    color: #2d7032;
  }

  .btn-check:hover {
    background-color: #c0e8b0;
}

  /* 게시판 제목 + 자세히 보기 */
  .section-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 10px;
      padding-bottom: 10px;
  }
  /* 게시판 글쓰기 + 자세히 보기 버튼 */
  .section-header2 {
      display: flex;
      gap: 10px;
  }


  .footer {
    background-color: #e9ecef;
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
  }
  .footer-header {
    display: flex;
    flex-direction: column;
  }
  div > p {
    color: gray;
    font-weight: bold;
  }

  /* 모달창 */
  .modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
  }
  
  .modal-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 20px;
    border-radius: 8px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    
  }

  .modal-content2 {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .modal-content3 {
    max-height: 400px;
    overflow-y: auto;
  }
  
  .modal-content input {
    padding: 10px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
  }
  
  .close {
    color: #aaa;
    float: right;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
  }
  .close:hover {
    color: black;
  }

  .font1 {
    color: black;
  }
  .modal-content3 ul {
    list-style-type: disc;
    padding-left: 20px;
  }

  .card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 10px var(--shadow);
    transition: transform 0.2s ease;
  }

  .card:hover {
    transform: translateY(-5px);
  }

  .card h2 {
    margin-bottom: 10px;
    color: var(--primary);
  }
  
  
  /* PC환경 or Mobile 환경경 */
  .pc-only {
    display: flex;
  }

  .mobile-only {
    display: none;
  }

  /* 반응형 처리 */
  @media (max-width: 768px) {
    nav {
      display: none;
    }

    .pc-only {
      display: none !important;
    }

    .menu-toggle {
      display: block;
    }

    .mobile-only {
      display: flex;
      flex-direction: row;
      margin-bottom: 20px;
      margin-top: 8px;
      gap: 10px;
    }

    .id-check-comment {
      font-size: 0.8em;
    }

    .ps-check-comment {
      font-size: 0.8em;
    }

    a.btn-write {
      display: inline-block;
      padding: 6px 12px;
      border: none;
      border-radius: 6px;
      font-weight: 600;
      font-family: inherit;
      background-color: #e0ecff; /* 기본 btn-write 색 */
      color: #2f4f99;
      margin-top: 15px;
      text-align: center;
      line-height: normal;
      font-size: 0.7em;
    }
    a.btn-detail {
      display: inline-block;
      padding: 8px 12px 6px;
      border: none;
      border-radius: 6px;
      font-weight: 600;
      font-family: inherit;
      background-color: #d0f0c0; /* 기본 btn-detail 색 */
      color: #2d7032;
      margin-top: 15px;
      text-align: center;
      line-height: normal;
      font-size: 0.7em;
    }
  }

  @media (min-width: 769px) {
    .side-nav {
      display: none;
    }
  }