body {
  background: linear-gradient(to bottom, #DCDCDC, #A9A9A9, #C0C0C0);
  background-attachment: fixed;
  background-repeat: no-repeat;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: repeating-linear-gradient(
    to right,
    rgba(255,255,255,0.05) 0px,
    rgba(255,255,255,0.05) 1px,
    transparent 1px,
    transparent 4px
  );
  pointer-events: none;
  z-index: 0;
}


body {
  background: linear-gradient(to bottom, #DCDCDC, #A9A9A9, #C0C0C0);
  font-family: 'Pretendard', sans-serif;
}

.login-wrapper {
  max-width: 400px;
  margin: 60px auto;
  text-align: center;
}

.login-meta {
  background: white;
  padding: 10px;
  margin-bottom: 20px;
  border-radius: 10px;
  font-size: 14px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.login-card {
  background: white;
  padding: 30px 20px;
  border-radius: 16px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.login-card .form-control {
  margin: 10px 0;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #ccc;
  width: 100%;
  box-sizing: border-box;
}

.checkbox-wrap {
  margin: 10px 0;
  text-align: left;
}

.button-group {
  display: flex;
  justify-content: space-between;
  margin-top: 15px;
}

.btn {
  flex: 1;
  padding: 10px;
  margin: 0 5px;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
}

.btn-primary {
  background: #4DB8FF;
  color: white;
  border: none;
}

.btn-outline {
  background: white;
  color: #4DB8FF;
  border: 2px solid #4DB8FF;
}

.extra-links {
  margin-top: 10px;
  font-size: 13px;
}
<style>
body {
  background: linear-gradient(to bottom, #DCDCDC, #A9A9A9, #C0C0C0) !important;
  font-family: 'Pretendard', sans-serif;
}

.navbar.navbar-default {
  background-color: #444 !important;
  border: none !important;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-default .navbar-nav>li>a,
.navbar-default .navbar-brand {
  color: #fff !important;
}

.panel, .well, .card, .box {
  background: #444 !important;
  color: white !important;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.form-control {
  border-radius: 10px !important;
  padding: 12px !important;
  color: #000;
}

.btn-primary, .btn {
  background: black !important;
  color: white !important;
  border: none !important;
  border-radius: 8px;
  font-weight: bold;
}
</style>

select.form-control {
  height: auto !important;            /* 높이 자동 조절 */
  font-size: 16px;                     /* 글자 크기 조절 */
  padding-right: 30px;                /* 드롭다운 화살표 공간 확보 */
  white-space: normal;                /* 줄바꿈 허용 */
}

.nav-pills > li > a {
  background-color: #000 !important;  /* 버튼 기본 배경: 검정 */
  color: #fff !important;             /* 기본 텍스트: 흰색 */
  border-radius: 6px;
  margin-right: 5px;
}

.nav-pills > li.active > a,
.nav-pills > li.active > a:focus,
.nav-pills > li.active > a:hover {
  background-color: #fff !important;  /* 선택된 버튼 배경: 흰색 */
  color: #000 !important;             /* 선택된 텍스트: 검정 */
}
rtant;
}