@charset "UTF-8";
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  padding: 20px;
  box-shadow: var(--shadow);
  position: sticky !important;
  top: 0;
  z-index: 10 !important;
}

header a {
  color: var(--text);
  text-decoration: none;
}

.home {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 10px;
  flex-basis: 0;
  flex-grow: 1;
  max-width: 100%;
}

.logo {
  height: 40px;
}

.logo > * {
  width: unset;
  height: 100%;
}

.title-text {
  display: flex;
  justify-content: flex-start;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 5px;
  min-width: 0;
  font-family: var(--title);
  text-align: left;
}

.title {
  font-size: var(--large);
}

.subtitle {
  opacity: 0.65;
  font-weight: var(--thin);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 30px;
  height: 30px;
  margin: 0;
  color: var(--text);
  appearance: none;
  transition: background var(--transition);
}

.nav-toggle:after {
  content: "\f0c9";
  position: absolute;
  left: 50%;
  top: 50%;
  color: var(--text);
  font-size: 15px;
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  transform: translate(-50%, -50%);
}

.nav-toggle:checked:after {
  content: "\f00d";
}

nav {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--heading);
  text-transform: uppercase;
}

nav > a {
  padding: 5px;
}

nav > a:hover {
  color: var(--primary);
}

@media (max-width: 700px) {
  header:not([data-big]) {
    justify-content: flex-end;
  }
  header:not([data-big]) .nav-toggle {
    display: flex;
  }
  header:not([data-big]) .nav-toggle:not(:checked) + nav {
    display: none;
  }
  header:not([data-big]) nav {
    align-items: flex-end;
    flex-direction: column;
    width: 100%;
  }
}

header[data-big] {
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 100px 20px;
  top: unset;
}
header[data-big] .home {
  flex-direction: column;
  flex-grow: 0;
}
header[data-big] .logo {
  height: 80px;
  flex-shrink: 0;
}
header[data-big] .title-text {
  flex-direction: column;
  align-items: center;
  text-align: center;
}
header[data-big] .title {
  font-size: var(--xxl);
}
header[data-big] .subtitle {
  font-size: var(--large);
}

.research-intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: start;
  margin-bottom: 4rem;
}

.research-text p {
  margin-bottom: 1.2rem;
  line-height: 1.85;
  color: #333;
  font-size: 1.05rem;
}

.research-lead {
  font-size: 1.35rem;
  line-height: 1.8;
  font-weight: 700;
  color: #111;
}

.research-side-image img {
  width: 100%;
  display: block;
  border-radius: 14px;
  object-fit: cover;
}

.research-sections {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.research-section {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.research-section.reverse {
  grid-template-columns: 0.9fr 1fr;
}

.research-section.reverse .research-section-text {
  order: 2;
}

.research-section.reverse .research-section-image {
  order: 1;
}

.research-section h2 {
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 1rem;
  color: #111;
}

.research-section p {
  font-size: 1.02rem;
  line-height: 1.85;
  color: #333;
  margin: 0;
}

.research-section-image img {
  width: 100%;
  display: block;
  border-radius: 14px;
  object-fit: cover;
}

@media (max-width: 900px) {
  .research-intro,
  .research-section,
  .research-section.reverse {
    grid-template-columns: 1fr;
  }
  .research-section.reverse .research-section-text,
  .research-section.reverse .research-section-image {
    order: initial;
  }
}
.photo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0; /* 공백 제거 */
}

.photo-item {
  position: relative;
  overflow: hidden;
}

.photo-item img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* overlay */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0); /* 기본은 투명 */
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.3s;
}

/* 텍스트 */
.overlay .text {
  color: white;
  font-size: 20px;
  text-align: center;
  opacity: 0;
  transition: 0.3s;
}

/* hover 효과 */
.photo-item:hover .overlay {
  background: rgba(0, 0, 0, 0.5);
}

.photo-item:hover .text {
  opacity: 1;
}

/*# sourceMappingURL=header.css.map */