* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Inter", sans-serif;
  background-color: #ffffff;
  color: #1a1a1a;
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1920px;
  margin: 0 auto;
  padding: 0 60px;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(10px);
          backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  transition: background-color 0.3s ease;
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(20px);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  line-height: 1;
}
.logo a {
  display: flex;
  line-height: 1;
}
.logo .logo-main {
  font-size: 18px;
  font-weight: 400;
  color: #1a1a1a;
}

.navigation {
  display: flex;
  gap: 40px;
  align-items: center;
}
.navigation .nav-link {
  font-size: 14px;
  font-weight: 400;
  color: #666666;
  text-decoration: none;
  transition: color 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
  line-height: 1.4;
}
.navigation .nav-link:hover {
  color: #1a1a1a;
}

.nav-project {
  text-align: center;
  display: block;
}

.nav-project .nav-full {
  display: block;
  pointer-events: none;
}

.nav-project .nav-short {
  display: none;
  pointer-events: none;
}

.nav-mobile-only {
  display: none;
}

.menu-toggle {
  display: none;
}

.mobile-slide-menu {
  position: fixed;
  top: 64px;
  left: -100%;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  z-index: 999;
  transition: left 0.3s ease;
  padding: 20px 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.mobile-slide-menu.active {
  left: 0;
}

.slide-menu-item {
  display: block;
  padding: 16px 40px;
  font-size: 14px;
  font-weight: 400;
  color: #666666;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color 0.3s ease, background-color 0.3s ease;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.slide-menu-item:hover {
  color: #1a1a1a;
  background-color: rgba(0, 0, 0, 0.02);
}

.slide-menu-item:last-child {
  border-bottom: none;
}

.project-collection {
  width: 100%;
  padding: 40px 0 80px;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  margin: 40px 0 120px;
}
.collection-intro {
  max-width: 720px;
  margin-bottom: 48px;
}
.collection-title {
  font-size: 42px;
  font-weight: 300;
  margin-bottom: 16px;
  color: #1a1a1a;
}
.collection-description {
  font-size: 18px;
  color: #666666;
  line-height: 1.8;
}
.collection-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(160px, 1fr));
  gap: 24px;
}
.collection-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-decoration: none;
  color: #1a1a1a;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.02);
  transition: transform 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
}
.collection-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 0, 0, 0.2);
  background: rgba(0, 0, 0, 0.04);
}
.collection-media {
  width: 100%;
  aspect-ratio: 4 / 5;
  overflow: hidden;
}
.collection-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.collection-card:hover .collection-media img {
  transform: scale(1.05);
}
.collection-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0 20px 24px;
}
.collection-number {
  font-size: 14px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: #999999;
}
.collection-name {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.4;
  color: #1a1a1a;
}
.collection-subtitle {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
}

/* Responsive - Mobile tweaks */
@media (max-width: 768px) {
  .header .container { height: 64px; padding: 0 20px; }
  .navigation { gap: 16px; }
  .navigation .nav-link { font-size: 12px; }
  .nav-project { display: none !important; }
  .nav-mobile-only { display: block !important; }
  .menu-toggle { display: block !important; }
  .logo .logo-main, .logo .logo-sub { font-size: 16px; }
  .hero { padding: 60px 0; }
  .container { padding: 0 20px; }
  .project-card { display: grid; grid-template-columns: 1fr; gap: 16px; }
  .thumbnail-image { width: 100%; height: auto; object-fit: contain; }
  .project-thumbnail { min-height: 300px; }
  .project-collection {
    padding: 32px 0 48px;
    margin: 40px 0 80px;
  }
  .collection-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .collection-card {
    gap: 12px;
  }
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background-color: #fafafa;
}
.hero .container {
  width: 100%;
}

.hero-title {
  margin-bottom: 40px;
}
.hero-title .title-line {
  display: block;
  font-size: 120px;
  font-weight: 300;
  line-height: 0.9;
  color: #1a1a1a;
  opacity: 0;
  transform: translateY(50px);
  animation: fadeInUp 1s ease forwards;
}
.hero-title .title-line:nth-child(1) {
  animation-delay: 0.2s;
}
.hero-title .title-line:nth-child(2) {
  animation-delay: 0.4s;
}
.hero-title .title-line:nth-child(3) {
  animation-delay: 0.6s;
}

.hero-subtitle {
  font-size: 18px;
  color: #666666;
  font-weight: 400;
  margin-bottom: 60px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease 0.8s forwards;
}

.scroll-indicator {
  opacity: 0;
  animation: fadeInUp 1s ease 1s forwards;
}
.scroll-indicator .arrow-down {
  font-size: 24px;
  color: #999999;
  display: inline-block;
  animation: bounce 2s infinite;
}

.projects {
  padding: 120px 0;
  background-color: #ffffff;
}

.project-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 80px;
  padding: 40px 0;
  border-radius: 8px;
  transition: all 0.3s ease;
  cursor: pointer;
}
.project-card:hover {
  background-color: rgba(0, 0, 0, 0.02);
}
.project-card:hover .project-thumbnail {
  transform: scale(1.05);
}
.project-card:hover .project-title .title-line {
  transform: translateX(10px);
  color: #1a1a1a !important;
}
.project-card:nth-child(even) {
  flex-direction: row-reverse;
}
.project-card:nth-child(even) .project-info {
  text-align: left;
}

.project-info {
  flex: 1;
  max-width: 600px;
}

.project-title {
  margin-bottom: 20px;
}
.project-title .title-line {
  display: block;
  font-size: 48px;
  font-weight: 300;
  line-height: 1.1;
  color: #1a1a1a;
  transition: transform 0.3s ease, color 0.3s ease;
  white-space: nowrap;
}
.project-title .title-line:hover {
  color: #000000 !important;
}

.project-description {
  font-size: 16px;
  color: #666666;
  font-weight: 400;
  line-height: 1.6;
}

.project-thumbnail {
  flex: 1;
  max-width: 600px;
  min-height: 400px;
  background-color: #f5f5f5;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  overflow: hidden;
  position: relative;
}

.project-card[data-project="3"] .project-thumbnail {
  min-height: auto !important;
  max-height: none !important;
  height: auto !important;
  display: inline-block;
  align-items: flex-start;
  padding-top: 0;
}

.project-thumbnail .thumbnail-placeholder {
  font-size: 14px;
  color: #999999;
  text-transform: lowercase;
}

.thumbnail-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  transition: transform 0.3s ease;
  border-radius: 8px;
}

.project-card[data-project="3"] .thumbnail-image {
  height: auto;
  width: 100%;
  object-fit: contain;
  object-position: top center;
  display: block;
  vertical-align: top;
}

.project-card[data-project="4"] .project-thumbnail {
  background-color: transparent !important;
  min-height: auto !important;
  height: auto !important;
  display: inline-block;
  align-items: flex-start;
}

.project-card[data-project="4"] .thumbnail-image {
  background-color: transparent !important;
  object-fit: cover;
  height: auto;
  width: 100%;
  display: block;
  vertical-align: top;
}

.project-card:hover .thumbnail-image {
  transform: scale(1.05);
}


.about {
  padding: 120px 0;
  background-color: #fafafa;
}

.section-title {
  font-size: 72px;
  font-weight: 300;
  margin-bottom: 60px;
  color: #1a1a1a;
  opacity: 0;
  transform: translateY(50px);
}

.about-content {
  max-width: 800px;
}

.about-text-en {
  font-size: 18px;
  color: #666666;
  font-weight: 400;
  line-height: 1.8;
  margin-bottom: 30px;
  opacity: 0;
  transform: translateY(30px);
}

.about-text-kr {
  font-size: 16px;
  color: #999999;
  font-weight: 400;
  line-height: 1.8;
  opacity: 0;
  transform: translateY(30px);
}

.contact {
  padding: 120px 0;
  background-color: #ffffff;
}

.contact-title {
  font-size: 24px;
  font-weight: 400;
  color: #1a1a1a;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(30px);
}
.contact-title a {
  color: #1a1a1a;
  text-decoration: none;
  transition: color 0.3s ease;
}
.contact-title a:hover {
  color: #666666;
}

.contact-info .contact-detail {
  font-size: 16px;
  color: #666666;
  font-weight: 400;
  margin-bottom: 10px;
  opacity: 0;
  transform: translateY(20px);
}
.contact-info .contact-detail a {
  color: #666666;
  text-decoration: none;
  transition: color 0.3s ease;
}
.contact-info .contact-detail a:hover {
  color: #1a1a1a;
}

.footer {
  padding: 40px 0;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  background-color: #fafafa;
}

.footer-text {
  font-size: 14px;
  color: #999999;
  font-weight: 400;
  text-align: center;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}
.fade-in {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1200px) {
  .container {
    padding: 0 40px;
  }
  .hero-title .title-line {
    font-size: 80px;
  }
  .collection-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .project-card {
    flex-direction: column !important;
    text-align: center;
  }
  .project-card .project-info {
    text-align: center !important;
    margin-bottom: 40px;
  }
}
@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  .hero-title .title-line {
    font-size: 60px;
  }
  .collection-title {
    font-size: 32px;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .project-title .title-line {
    font-size: 32px;
  }
  .section-title {
    font-size: 48px;
  }
  .navigation {
    gap: 30px;
  }
}
@media (max-width: 480px) {
  .hero-title .title-line {
    font-size: 40px;
  }
  .collection-grid {
    grid-template-columns: 1fr;
  }
  .collection-title {
    font-size: 28px;
  }
  .project-title .title-line {
    font-size: 24px;
  }
  .section-title {
    font-size: 32px;
  }
  .header .container {
    padding: 0 15px;
  }
  
  .navigation {
    gap: 12px;
  }
  .navigation .nav-link {
    font-size: 11px;
  }
  
  .logo .logo-main {
    font-size: 14px;
  }
}