/* General styles */
body {
  background-color: #f8f9fa;
  font-family: Arial, sans-serif;
}

header {
  background-color: #007bff;
}

header img {
  max-width: 150px;
}

/* Container styles */
.container {
  margin: 0 auto;
  max-width: 800px;
  text-align: center;
}

/* Heading styles */
h1, h1.display-4 {
  color: #0077be;
  font-size: 2.5rem;
  margin: 2rem 0 1.5rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 300;
}

p.lead {
  font-size: 2rem;
  color: #6c757d;
}

/* Button styles */
.btn {
  display: inline-block;
  background-color: #3E64AF;
  color: #fff;
  padding: 0.5rem 1.5rem;
  border: none;
  border-radius: 50px;
  margin-top: 2rem;
  cursor: pointer;
  font-size: 1.2rem;
  text-align: center;
  text-decoration: none;
  box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.3);
  transition: background-color 0.3s ease, transform 0.2s ease-out;
}

.btn:hover {
  background-color: #5F85E9;
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(2px);
}

.btn-group .btn {
  margin: 0 10px;
}

/* Table styles */
table {
  width: 100%;
  margin: 2rem 0;
  border-collapse: collapse;
}

th, td {
  border: 2px solid #ddd;
  padding: 1rem;
  text-align: center;
}

th {
  background-color: #f2f2f2;
  text-transform: uppercase;
}

/* Form styles */
label {
  display: block;
  margin-bottom: 0.5rem;
}

input {
  padding: 0.5rem 1rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
  width: 100%;
}

/* Hide text but make it visible on selection */
.hidden-text {
  color: transparent !important;
}

.hidden-text::selection {
  color: black !important; /* 원하는 색상으로 변경 */
  background: yellow !important; /* 선택 시 배경색도 변경 가능 */
}