:root {
  --primary-color: #0056b3;
  --secondary-color: #004494;
  --text-color: #333333;
  --light-gray: #f8f9fa;
  --white: #ffffff;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  scroll-behavior: smooth;
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-padding {
  padding: 80px 0;
}

.bg-light {
  background-color: var(--light-gray);
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  color: var(--primary-color);
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

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

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

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: var(--shadow);
  z-index: 1000;
  height: 70px;
  display: flex;
  align-items: center;
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links a {
  margin-left: 30px;
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: var(--transition);
}

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

.hamburger {
  display: none;
  cursor: pointer;
}

.hamburger .bar {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-color);
  margin: 5px auto;
  transition: var(--transition);
}

/* Hero */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1556740758-90de374c12ad?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80');
  background-size: cover;
  background-position: center;
  color: var(--white);
  text-align: center;
  padding-top: 70px;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 30px;
}

/* Solutions */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.solution-card {
  background: var(--white);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: var(--transition);
}

.solution-card:hover {
  transform: translateY(-5px);
}

.solution-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

/* Contact */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--white);
  padding: 40px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-family: inherit;
}

.form-status {
  margin-top: 20px;
  text-align: center;
  font-weight: bold;
  color: var(--primary-color);
}

/* Buttons */
.btn-outline {
  background-color: transparent;
  border: 2px solid var(--white);
  color: var(--white);
  margin-left: 10px;
}

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

.btn-nav {
  padding: 8px 16px;
  background-color: var(--primary-color);
  color: var(--white) !important;
  border-radius: 5px;
}

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

.hero-btns {
  display: flex;
  justify-content: center;
}

/* Service Link */
.service-link {
  display: inline-block;
  margin-top: 15px;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: bold;
}

.service-link:hover {
  text-decoration: underline;
}

/* Footer Dark */
.footer-dark {
  background-color: #222;
  color: #ccc;
  padding: 50px 0 20px;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  border-bottom: 1px solid #444;
  padding-bottom: 30px;
  margin-bottom: 20px;
}

.footer-info h3 {
  color: var(--white);
  margin-bottom: 15px;
}

.footer-links a {
  color: #ccc;
  text-decoration: none;
  margin-left: 20px;
}

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

.footer-copyright {
  text-align: center;
  font-size: 0.9rem;
}

/* Floating CTA */
.floating-cta {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: var(--primary-color);
  color: var(--white);
  padding: 15px 30px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  transition: var(--transition);
}

.floating-cta:hover {
  transform: translateY(-5px);
  background-color: var(--secondary-color);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-btns {
    flex-direction: column;
    gap: 10px;
  }

  .btn-outline {
    margin-left: 0;
    text-align: center;
  }

  .footer-container {
    flex-direction: column;
    gap: 30px;
  }

  .footer-links {
    margin-top: 20px;
  }

  .footer-links a {
    margin-left: 0;
    margin-right: 20px;
  }

  .nav-links {
    position: absolute;
    top: 70px;
    left: -100%;
    background-color: var(--white);
    width: 100%;
    flex-direction: column;
    text-align: center;
    padding: 20px 0;
    transition: 0.3s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

  .nav-links.active {
    left: 0;
  }

  .nav-links a {
    display: block;
    margin: 20px 0;
  }

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