:root {
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --accent-color: #3b82f6;
  --light-color: #f0f9ff;
  --dark-color: #1e293b;
  --gray-color: #64748b;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  line-height: 1.6;
  color: var(--dark-color);
  background-color: #f8fafc;
}

header {
  background-color: var(--dark-color);
  color: white;
  padding: 1rem 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: white;
  text-decoration: none;
}

.logo span {
  color: var(--accent-color);
}

nav {
  display: flex;
  align-items: center;
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 2rem;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: var(--accent-color);
}

.language-switch {
  margin-left: 2rem;
  display: flex;
  align-items: center;
}

.language-switch a {
  color: white;
  text-decoration: none;
  padding: 0.3rem 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 4px;
  transition: all 0.3s;
}

.language-switch a.active {
  background-color: var(--primary-color);
}

.language-switch a:hover:not(.active) {
  background-color: rgba(255, 255, 255, 0.1);
}

.language-switch span {
  margin: 0 0.3rem;
  color: rgba(255, 255, 255, 0.5);
}

.hero {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  text-align: center;
  padding: 8rem 2rem 6rem;
  margin-top: 4rem;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 2rem;
  opacity: 0.9;
}

.btn {
  display: inline-block;
  background-color: white;
  color: var(--primary-color);
  padding: 0.8rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
  margin: 0.5rem;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid white;
  color: white;
}

.btn-outline:hover {
  background-color: white;
  color: var(--primary-color);
}

section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2rem;
  color: var(--dark-color);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: "";
  position: absolute;
  width: 50%;
  height: 3px;
  background-color: var(--accent-color);
  bottom: -10px;
  left: 25%;
}

.section-title p {
  color: var(--gray-color);
  max-width: 700px;
  margin: 0 auto;
}

.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.service-card {
  background-color: white;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s, box-shadow 0.3s;
  padding: 2rem;
  text-align: center;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
  background-color: var(--light-color);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.service-icon i {
  font-size: 2rem;
  color: var(--primary-color);
}

.service-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--dark-color);
}

.service-card p {
  color: var(--gray-color);
  margin-bottom: 1.5rem;
}

.cta {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  text-align: center;
  padding: 5rem 2rem;
}

.cta h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.cta p {
  max-width: 700px;
  margin: 0 auto 2rem;
  opacity: 0.9;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.contact-card {
  background-color: white;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  text-align: center;
}

.contact-card i {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.contact-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--dark-color);
}

.contact-card p,
.contact-card a {
  color: var(--gray-color);
  text-decoration: none;
}

.contact-card a:hover {
  color: var(--primary-color);
}

.contact-form {
  margin-top: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-control {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
  cursor: pointer;
  width: 100%;
}

.btn-primary:hover {
  background-color: var(--secondary-color);
}

footer {
  background-color: var(--dark-color);
  color: white;
  text-align: center;
  padding: 2rem 0;
}

.footer-links {
  display: flex;
  justify-content: center;
  list-style: none;
  margin: 1.5rem 0;
}

.footer-links li {
  margin: 0 1rem;
}

.footer-links a {
  color: white;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: var(--accent-color);
}

.social-icons {
  margin: 1rem 0;
}

.social-icons a {
  display: inline-block;
  margin: 0 0.5rem;
  color: white;
  font-size: 1.5rem;
  transition: transform 0.3s, color 0.3s;
}

.social-icons a:hover {
  color: var(--accent-color);
  transform: translateY(-3px);
}

.copyright {
  margin-top: 1.5rem;
  opacity: 0.8;
  font-size: 0.9rem;
}

/* Hidden class for language switcher */
.en-content,
.kr-content {
  display: none;
}

body.en .en-content {
  display: block;
}

body.kr .kr-content {
  display: block;
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    text-align: center;
  }

  nav {
    flex-direction: column;
  }

  nav ul {
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  nav ul li {
    margin: 0.5rem 1rem;
  }

  .language-switch {
    margin: 1rem 0 0 0;
  }

  .hero {
    padding-top: 10rem;
  }

  .hero h1 {
    font-size: 2rem;
  }
}