/* ===========================
   Dashboard Main Tab (id="main")
   =========================== */

#main {
  padding: 16px 12px 32px;
  box-sizing: border-box;
}

/* ------- 공통 그리드 레이아웃 ------- */

#main .row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -8px;           /* 양쪽 여백용 */
}

#main .col-lg-12,
#main .col-lg-7,
#main .col-lg-3,
#main .col-sm-6 {
  padding: 0 8px;
  box-sizing: border-box;
}

/* 기본 비율 */
#main .col-lg-12 {
  flex: 0 0 100%;
  max-width: 100%;
}

#main .col-lg-7 {
  flex: 0 0 60%;
  max-width: 60%;
}

#main .col-lg-3,
#main .col-sm-6 {
  flex: 0 0 25%;
  max-width: 25%;
}

/* 반응형 : 태블릿 */
@media (max-width: 1024px) {
  #main .col-lg-7,
  #main .col-lg-3,
  #main .col-sm-6 {
    flex: 0 0 50%;
    max-width: 50%;
  }
}

/* 반응형 : 모바일 */
@media (max-width: 640px) {
  #main .col-lg-7,
  #main .col-lg-3,
  #main .col-sm-6 {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

/* ===========================
   상단 메인 배너
   =========================== */

#main .main-banner {
  margin-bottom: 24px;
  border-radius: 16px;
  padding: 24px;
  background: linear-gradient(135deg, #111827, #0b0f1c);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #e5e7eb;
}

#main .header-text h6 {
  margin: 0 0 6px;
  color: #9ca3af;
  font-size: 13px;
}

#main .header-text h4 {
  margin: 4px 0 10px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.35;
}

#main .header-text em {
  color: #60a5fa;
  font-style: normal;
}

#main .header-text p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.5;
  color: #d1d5db;
}

/* 검색 폼 */
#main .main-search-form {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  max-width: 420px;
}

#main .main-search-form input {
  flex: 1;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  padding: 9px 12px;
  outline: none;
  font-size: 13px;
}

#main .main-search-form input::placeholder {
  color: #9ca3af;
}

#main .main-search-form button {
  border-radius: 10px;
  border: none;
  padding: 9px 14px;
  background: #3b82f6;
  color: #fff;
  cursor: pointer;
  font-size: 13px;
}

#main .main-button {
  margin-top: 8px;
}

#main .main-button a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #e5e7eb;
  font-size: 13px;
}

/* ===========================
   홍보 배너 영역
   =========================== */

#main .banner-section {
  margin-top: 24px;
}

#main .heading-section h4 {
  margin: 0 0 4px;
  font-size: 16px;
}

#main .heading-section em {
  color: #2563eb;
  font-style: normal;
}

#main .heading-sub {
  margin: 0 0 10px;
  font-size: 12px;
  color: #9ca3af;
}

/* 4개 배너가 한 줄에 들어가도록 */
#main .banner-row {
  margin-top: 4px;
  row-gap: 28px;
}

/* 배너 카드 */
#main .banner-card {
  width: 100%;
  border-radius: 16px;
  background: #050814;
  border: 1px solid rgba(0, 0, 0, 0.25);
  overflow: hidden;
  box-shadow: 0 18px 32px rgba(0, 0, 0, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease,
    border-color 0.15s ease;
}

#main .banner-card:hover {
  transform: translateY(-4px);
  border-color: #3b82f6;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
}

#main .banner-card a {
  display: block;
}

/* 720 x 300 비율 유지 */
#main .banner-card img {
  width: 100%;
  aspect-ratio: 12 / 5;   /* 720 : 300 */
  object-fit: cover;
  display: block;
}

#main .banner-section {
  margin-bottom: 18px;
}

/* =========================
   Main Banner Hero Background
   ========================= */
.main-banner{
  position: relative;
  overflow: hidden;
}

/* 배경 이미지 레이어 */
.main-banner .main-hero-bg{
  position: absolute;
  inset: 0;
  background-image: var(--hero-img);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.35;            /* 배경 진하기 */
  transform: scale(1.03);   /* 가장자리 여유 */
  filter: saturate(1.1) contrast(1.05);
  z-index: 0;
}

/* 텍스트 가독성용 어두운 오버레이 */
.main-banner::before{
  content:"";
  position:absolute;
  inset:0;
  background: radial-gradient(80% 120% at 30% 30%, rgba(0,0,0,.20), rgba(0,0,0,.75));
  z-index: 1;
}

/* 실제 컨텐츠는 위로 */
.main-banner > .row{
  position: relative;
  z-index: 2;
}

/* 모바일에서 너무 튀면 조금 더 눌러주기 */
@media (max-width: 768px){
  .main-banner .main-hero-bg{ opacity: 0.25; }
}