* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  body {
    font-family: "Inter", sans-serif;
    background-color: #ffffff;
    color: #000000;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  .container {
    width: 96%;
    padding: 0 2%;
  }
  .main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: #ffffff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
  }
  .nav-brand {
    position: relative;
    font-weight: 500;
    font-size: 1.5rem;
    color: #000000;
    text-decoration: none;
    display: inline-block;
  }
  .nav-brand span {
    transition: opacity 0.3s ease-in-out;
  }
  .nav-brand .brand-english {
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
  }
  .nav-brand:hover .brand-korean {
    opacity: 0;
  }
  .nav-brand:hover .brand-english {
    opacity: 1;
  }
  .nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
  }
  .nav-links a {
    text-decoration: none;
    color: #000000;
    font-size: 1.1rem;
    font-weight: 400;
    transition: opacity 0.3s ease;
  }
  .nav-links a.active {
    text-decoration: underline;
    text-underline-offset: 4px;
  }
  .header-divider {
    border: none;
    height: 1px;
    background-color: #000000;
    margin: 0;
  }
  .case-study-header {
    padding: 80px 0;
    text-align: center;
  }
  .case-study-header h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 400;
    margin-bottom: 20px;
  }
  .case-study-header .summary {
    font-size: 1.2rem;
    font-weight: 300;
    color: #555;
    max-width: 700px;
    margin: 0 auto 40px auto;
  }
  .metadata-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    max-width: 800px;
    margin: 0 auto 40px auto;
    text-align: left;
  }
  .metadata-item h4 {
    font-size: 0.9rem;
    font-weight: 500;
    color: #555;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  .metadata-item p {
    font-size: 1.1rem;
    font-weight: 300;
  }
  .project-links {
    display: flex;
    justify-content: center;
    gap: 20px;
  }
  .button-primary,
  .button-secondary {
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.3s ease;
  }
  .button-primary {
    background-color: #000;
    color: #fff;
  }
  .button-primary:hover {
    background-color: #333;
  }
  .button-secondary {
    background-color: transparent;
    color: #000;
    border: 1px solid #000;
  }
  .button-secondary:hover {
    background-color: #000;
    color: #fff;
  }
  .slider-section {
    margin-bottom: 80px;
  }
  .slider-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 8px;
    background-color: #f0f0f0;
    aspect-ratio: 16 / 9;
  }
  .slider-wrapper {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease-in-out;
  }
  .slide {
    min-width: 100%;
    height: 100%;
    box-sizing: border-box;
  }
  .slide img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
  }
  .slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.8);
    border: none;
    color: #000;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    display: grid;
    place-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  .slider-container:hover .slider-btn {
    opacity: 1;
  }
  .prev-btn {
    left: 15px;
  }
  .next-btn {
    right: 15px;
  }
  .text-section,
  .grid-section {
    max-width: 800px;
    margin: 0 auto 80px auto;
  }
  .text-section h3,
  .grid-section h3 {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 30px;
  }
  .text-section p {
    font-size: 1.2rem;
    font-weight: 300;
    line-height: 1.7;
    color: #333;
    margin-bottom: 30px;
  }
  .grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
  }
  .grid-item h4 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 10px;
  }
  .grid-item p {
    font-size: 1.1rem;
    font-weight: 300;
    line-height: 1.6;
    color: #555;
  }
  .project-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 40px 0;
    margin-top: 80px;
    border-top: 1px solid #e0e0e0;
  }
  .project-nav a {
    font-size: 1.2rem;
    font-weight: 400;
    color: #000;
    text-decoration: none;
    transition: opacity 0.3s ease;
  }
  .project-nav a:hover {
    opacity: 0.6;
  }