* {
  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%;
}

hr {
  border: none;
  height: 1px;
  background-color: #000000;
  margin: 80px 0;
}

.header-divider {
  margin: 0;
}

.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  transition: box-shadow 0.3s ease;
}

.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, transform 0.3s ease;
}

.nav-links a:hover {
  opacity: 0.6;
  transform: translateY(-2px);
}

.hero {
  padding: 60px 0;
}

.hero-visuals {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-bottom: 40px;
}

.hero-visuals img {
  height: 120px;
  width: auto;
  animation: fadeIn 1s ease-out forwards;
}

.hero-visuals img:nth-child(2) {
  animation-delay: 0.2s;
}

.hero-headline {
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -0.02em;
  max-width: 90%;
}

.expertise h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
}

.expertise-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 60px;
}

.expertise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  padding-left: clamp(20px, 15vw, 200px);
}

.expertise-column {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.expertise-category h4 {
  font-size: 0.9rem;
  font-weight: 500;
  color: #555;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.expertise-list {
  list-style: none;
}

.expertise-list li {
  font-size: 1.2rem;
  font-weight: 300;
  margin-bottom: 15px;
  line-height: 1.4;
}

.developer-section h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  margin-bottom: 60px;
}

.developer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: flex-start;
}

.developer-photo {
  width: 100%;
  height: auto;
  margin-bottom: 20px;
}

.developer-card-large h3 {
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 5px;
}

.developer-card-large p {
  font-size: 1.1rem;
  font-weight: 300;
  color: #555;
}

.developer-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 60px;
  padding-top: 20px;
}

.detail-item {
  transition: transform 0.3s ease;
}

.detail-item:hover {
  transform: translateX(5px);
}

.detail-item h4 {
  font-size: 0.9rem;
  font-weight: 500;
  color: #555;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.detail-item p {
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 1.4;
}

.pre-footer p {
  font-size: 1.8rem;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.main-footer {
  padding: 0 0 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 100px;
  align-items: start;
}

.footer-logos img {
  height: 110px;
  width: auto;
  margin-right: 15px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.contact-group h4,
.footer-social h4 {
  font-size: 0.9rem;
  font-weight: 500;
  color: #000000;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 15px;
}

.contact-group p,
.contact-group a,
.footer-social ul li a {
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 1.6;
  color: #000;
  text-decoration: none;
  display: block;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.contact-group a:hover,
.footer-social ul li a:hover {
  opacity: 0.6;
  transform: translateY(-2px);
}

.footer-social ul {
  list-style: none;
}

.button {
  cursor: pointer;
  border: none;
  background: #000000;
  color: #ffffff;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  display: grid;
  place-content: center;
  transition: transform 200ms;
  font-weight: 600;
  text-decoration: none;
  flex-shrink: 0;
}

.button__text {
  position: absolute;
  inset: 0;
  animation: text-rotation 10s linear infinite;
  font-size: 14px;
  text-transform: uppercase;
}

.button__text span {
  position: absolute;
  left: 50%;
  top: 0;
  transform-origin: 0 60px;
  transform: rotate(calc(24deg * var(--index)));
}

.button__circle {
  position: relative;
  width: 50px;
  height: 50px;
  overflow: hidden;
  background: #ffffff;
  color: #000000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.button__icon--copy {
  position: absolute;
  transform: translate(-150%, 150%);
}

.button:hover {
  transform: scale(1.05);
}

.button:hover .button__icon:first-child {
  transition: transform 0.3s ease-in-out;
  transform: translate(150%, -150%);
}

.button:hover .button__icon--copy {
  transition: transform 0.3s ease-in-out 0.1s;
  transform: translate(0);
}

.sticky-button {
  position: fixed;
  bottom: 40px;
  right: 40px;
  z-index: 1000;
}

@keyframes text-rotation {
  to {
    transform: rotate(360deg);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 992px) {
  .developer-grid {
    grid-template-columns: 1fr;
  }
  .developer-details {
    padding-top: 0;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 5%;
  }
  hr {
    margin: 60px 0;
  }
  .main-header {
    padding: 10px 0;
  }
  .hero {
    padding: 60px 0;
  }
  .hero-visuals img {
    height: 60px;
  }
  .hero-headline {
    max-width: 100%;
  }
  .expertise-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 40px;
  }
  .expertise-grid {
    grid-template-columns: 1fr;
    gap: 60px;
    padding-left: 0;
  }
  .developer-details {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 60px;
  }
}
/* ==================================== */
/* == Highlights Section Styles      == */
/* ==================================== */
.highlights-section {
  margin-top: 60px; /* Adds space below the main headline */
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px; /* Space between the two highlight items */
  max-width: 90%; /* Aligns with the max-width of your headline */
}

.highlight-item {
  border-left: 2px solid #000; /* A simple, elegant visual separator */
  padding-left: 20px; /* Pushes the text away from the border */
}

.highlight-item p {
  font-size: clamp(1rem, 2.5vw, 1.2rem); /* Responsive font size */
  font-weight: 300;
  line-height: 1.5;
  color: #333; /* Slightly softer than pure black */
}

.highlight-item p strong {
  font-weight: 500; /* Makes the key numbers/phrases stand out */
  color: #000;
}

/* Responsive adjustment for mobile */
@media (max-width: 768px) {
  .highlights-section {
    max-width: 100%;
    margin-top: 40px;
  }
}