a {
  text-decoration: underline;
  text-decoration-style: dotted; /* 밑줄 점선 */
  text-underline-offset: 2px; 
  /* color: #007bff; */
}
pre {
  white-space: pre-wrap;     /* 줄바꿈 유지 + 자동 줄바꿈 */
  word-wrap: break-word;     /* 긴 단어도 줄바꿈 */
  line-height: 1.6;
  margin: 0;                 /* pre 기본 여백 제거 */
}

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1080;
  padding: .5rem .75rem;
  border-radius: .75rem;
  backdrop-filter: blur(6px);
  box-shadow: 0 4px 16px rgba(0,0,0,.1);
}

/* Header 배경 이미지 적용 */
/* .header {
  background: url('header_bg.png') no-repeat center center;
  background-size: cover;
  align-items: center;
  position: relative;
  color: white;
} */

/* 헤더 안의 텍스트 가독성을 위해 살짝 그림자 */
.header h2 {
  text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  margin: 0;
  font-family: Arial, sans-serif;
}

.vh-100 {
  height: 100vh;
}

.header {
  flex-shrink: 0;
}

.main {
  display: flex;
  flex-grow: 1;
  overflow: hidden;
}

.sidebar {
  width: 250px;
  /* background-color: #f8f9fa; */
  padding: 15px;
  overflow-y: auto;
  flex-shrink: 0;
}

.content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
  overflow-y: auto;
}

.main-content {
  flex-grow: 1;
}

.footer {
  flex-shrink: 0;
  display: flex;
  gap: 10px;
  padding-top: 10px;
}

textarea#msg {
  flex-grow: 1;
}

button#send {
  flex-shrink: 0;
}

/* Add cursor change on hover for radio buttons */
.form-check-input:hover, 
.form-check-label:hover {
  cursor: pointer;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin-top: 10px;
}
th, td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}
th {
  background-color: #f4f4f4;
  font-weight: bold;
}

.active-item {
  /* background-color: #6c757d;
  color: #fff;
  border-color: #6c757d; */
  color: var(--bs-list-group-action-hover-color);
  text-decoration: none;
  background-color: var(--bs-list-group-action-hover-bg);
}

/* .btn-outline-secondary {
  --bs-btn-border-color: initial;
} */