:root {
    --primary: #2196F3;
    --primary-dark: #1976D2;
    --primary-gradient: linear-gradient(135deg, #1976D2, #2196F3);
    --text-primary: #191F28;
    --text-secondary: #4E5968;

    /* Section backgrounds */
    --bg-blue-gradient: linear-gradient(180deg, rgba(239, 246, 255, 0.6) 0%, #FFFFFF 100%);
    --bg-purple-gradient: linear-gradient(180deg, rgba(245, 243, 255, 0.4) 0%, #FFFFFF 100%);
    --bg-green-gradient: linear-gradient(180deg, rgba(236, 253, 245, 0.5) 0%, #FFFFFF 100%);
    
    /* New section backgrounds */
    --bg-soft-blue: linear-gradient(180deg, rgba(224, 242, 254, 0.5) 0%, #FFFFFF 100%);
    --bg-soft-gray: linear-gradient(180deg, rgba(249, 250, 251, 0.8) 0%, #FFFFFF 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans KR', sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-primary);
    overflow-x: hidden;
}

.section {
    padding: 180px 0;
    position: relative;
    overflow: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo img {
    height: 65px;
    padding-top: 0.5em;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: color 0.2s;
}

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

/* Hero Section */
.hero {
    background: var(--bg-blue-gradient);
    padding-top: 50px;
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 80px;
    line-height: 1.2;
    margin-bottom: 32px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 48px;
}

.cta-button {
    display: inline-block;
    padding: 16px 32px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.2s;
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Common components */
.service-badge {
    display: inline-block;
    padding: 12px 24px;
    background: rgba(33, 150, 243, 0.1);
    color: var(--primary);
    border-radius: 32px;
    font-weight: 700;
    font-size: 35px;
    margin-bottom: 24px;
}

.section-title {
    font-size: 48px;
    line-height: 1.3;
    margin-bottom: 24px;
}

.section-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 64px;
}

/* QR Service Section */
.qr-upload {
    background: white;
    border-radius: 24px;
    padding: 48px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    text-align: center;
    margin-bottom: 120px;
}

.qr-upload-title {
    font-size: 32px;
    margin-bottom: 24px;
}

.qr-upload-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

  .upload-demo {
      background: var(--bg-blue-gradient);
      border-radius: 16px;
      padding: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 48px;
  }

  .upload-step {
      text-align: center;
      flex: 1;
  }

  .upload-step i {
      font-size: 48px;
      color: var(--primary);
      margin-bottom: 16px;
  }

  .upload-step h4 {
      font-size: 18px;
      margin-bottom: 8px;
  }

  .upload-step p {
      color: var(--text-secondary);
      font-size: 14px;
  }

  /* 화살표 아이콘 스타일링 */
  .upload-demo .fa-arrow-right {
      color: var(--primary);
      font-size: 24px;
  }

  /* 반응형 디자인 */
  @media (max-width: 1024px) {
      .upload-demo {
          flex-direction: column;
          gap: 32px;
          padding: 24px;
      }

      .upload-step {
          width: 100%;
          max-width: 280px;
      }

      /* 화살표 방향 변경 */
      .upload-demo .fa-arrow-right {
          transform: rotate(90deg);
      }

      .upload-step p {
          font-size: 14px;
          /* 모바일에서는 줄바꿈 제거 */
          br {
              display: none;
          }
      }
  }

  @media (max-width: 480px) {
      .upload-demo {
          padding: 20px;
          gap: 24px;
      }

      .upload-step i {
          font-size: 36px;
      }

      .upload-step h4 {
          font-size: 16px;
      }

      .upload-step p {
          font-size: 13px;
      }
  }

.feature-card {
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s;
    margin-bottom: 30px;
}

.feature-card:hover {
    transform: translateY(-8px);
}

.feature-card i {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
}

/* Content Support Grid */
.content-support-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 64px;
}

.content-support-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 24px;
    padding: 32px;
    background: white;
    border-radius: 24px;
    transition: all 0.3s ease;
    overflow: hidden;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.05);
}

.content-support-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.content-support-icon {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    z-index: 2;
}

.content-support-icon .icon-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(33, 150, 243, 0.1);
    border-radius: 20px;
    opacity: 0.6;
    transform: scale(0.8);
    transition: all 0.3s ease;
    z-index: -1;
}

.content-support-item:hover .icon-background {
    transform: scale(1);
    opacity: 1;
}

.content-support-icon span,
.content-support-icon svg {
    position: relative;
    z-index: 3;
    color: #2196F3;
}

.content-support-icon.text-icon span {
    font-family: 'Arial', sans-serif;
    font-size: 32px;
    font-weight: bold;
}

.content-support-icon.link-icon svg {
    width: 40px;
    height: 40px;
    stroke: #2196F3;
}

.content-support-icon.code-icon span {
    font-family: 'Courier New', monospace;
    font-size: 32px;
    font-weight: bold;
}

.content-support-details {
    flex-grow: 1;
}

.content-support-details h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: #191F28;
    transition: color 0.3s ease;
}

.content-support-item:hover .content-support-details h3 {
    color: #2196F3;
}

.content-support-details p {
    font-size: 16px;
    color: #4E5968;
    line-height: 1.6;
}

/* Use cases section */
.use-cases {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-top: 64px;
}

.use-case {
    background: white;
    padding: 32px;
    border-radius: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s;
}

.use-case:hover {
    transform: translateY(-8px);
}

.use-case i {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 24px;
}

.use-case h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

.use-case p {
    color: var(--text-secondary);
}

/* Contact Form */
.contact-form {
  background: white;
  border-radius: 24px;
  padding: 48px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
}

.form-row {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
}

.form-group {
  width: 100%;
  margin-bottom: 24px;
}

.form-group.half-width {
  width: 50%;
}

.form-group label {
  display: block;
  margin-bottom: 12px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: 16px;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  font-size: 16px;
  transition: all 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.1);
}

textarea.form-input {
  resize: vertical;
  min-height: 120px;
}

.submit-button {
  width: 100%;
  padding: 16px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.submit-button:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* Checkbox Styling */
.checkbox-container {
  display: block;
  position: relative;
  padding-left: 35px;
  margin-bottom: 24px;
  cursor: pointer;
  font-size: 16px;
  user-select: none;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 24px;
  width: 24px;
  background-color: white;
  border: 2px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px;
}

.checkbox-container:hover input ~ .checkmark {
  background-color: #f1f1f1;
}

.checkbox-container input:checked ~ .checkmark {
  background-color: var(--primary);
  border-color: var(--primary);
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
  display: block;
}

.checkbox-container .checkmark:after {
  left: 9px;
  top: 5px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .form-row {
      flex-direction: column;
      gap: 24px;
  }

  .form-group.half-width {
      width: 100%;
  }

  .contact-form {
      padding: 32px;
  }
}

/* Contact Section */
/* Contact Section */
.contact-section-header {
text-align: center;
margin-bottom: 48px;
}

.contact-card {
background: white;
border-radius: 24px;
padding: 48px;
box-shadow: 0 12px 32px rgba(0,0,0,0.08);
display: flex;
flex-direction: column;
align-items: center;
text-align: center;
gap: 24px;
}

.contact-info {
display: flex;
flex-direction: column;
align-items: center;
gap: 16px;
}

.contact-info h3 {
font-size: 24px;
font-weight: 700;
color: var(--text-primary);
margin-bottom: 8px;
}

.contact-info p {
font-size: 16px;
color: var(--text-secondary);
}

.embed-container {
width: 380px;
height: 600px;
margin: 0 auto;
border-radius: 30px;
overflow: hidden;
box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.channel-embed {
    border: none;
    border-radius: 20px;
    width: 100%;
    height: 100%;
}

/* 반응형 디자인 */
@media (max-width: 1024px) {
    .container {
    padding: 0 24px;
    }
}

@media (max-width: 768px) {
    .contact-card {
    padding: 24px;
    }

    .contact-info h3 {
    font-size: 20px;
    }

    .contact-info p {
    font-size: 14px;
    }
}

/* Footer */
footer {
  background: #191F28;
  color: white;
  padding: 60px 0;
  font-size: 16px;
  text-align: center;
}

.footer-top {
  margin-bottom: 40px;
}

.footer-logo img {
  width: 250px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1100px;
  margin: 0 auto;
  text-align: left;
}

.footer-column h3 {
  font-size: 18px;
  margin-bottom: 16px;
  font-weight: 700;
  text-transform: uppercase;
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

.footer-column ul li {
  margin-bottom: 10px;
  font-size: 20px;
  opacity: 0.8;
}

.footer-column ul li a {
  color: white;
  text-decoration: none;
  transition: opacity 0.2s;
}

.footer-column ul li a i {
  margin-right: 8px;
  font-size: 20px;
}

.footer-column ul li a:hover {
  opacity: 1;
}

.lang-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  padding: 12px 24px;
  font-size: 14px;
  color: white;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 0 8px;
}

.lang-btn.active, .lang-btn:hover {
  background: white;
  color: #191F28;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
  .footer-grid {
      grid-template-columns: 1fr;
      text-align: center;
  }

  .footer-column {
      margin-bottom: 20px;
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .section-title {
        font-size: 36px;
    }

    .features-grid,
    .use-cases {
        grid-template-columns: 1fr 1fr;
    }

    .content-support-grid {
        grid-template-columns: 1fr;
    }

    .content-support-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .content-support-icon {
        margin-bottom: 16px;
    }
}

@media (max-width: 700px) {
    .hero h1 {
        font-size: 48px;
    }

    .hero p {
        font-size: 20px;
    }

    .nav-links {
        display: none;
    }

    .features-grid,
    .use-cases {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 120px 0;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 28px;
    }

    .section-description {
        font-size: 16px;
    }
}

  /* Hamburger Menu */
  .hamburger-menu {
      display: none;
      flex-direction: column;
      cursor: pointer;
      z-index: 1100;
  }

  .hamburger-menu .bar {
      width: 25px;
      height: 3px;
      background-color: var(--text-primary);
      margin: 3px 0;
      transition: 0.4s;
  }

  .mobile-nav {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: white;
      z-index: 1100;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      transform: translateX(100%);
      transition: transform 0.3s ease-in-out;
  }

  .mobile-nav.active {
      transform: translateX(0);
  }

  .mobile-nav a {
      font-size: 24px;
      margin: 20px 0;
      color: #191F28;
      text-decoration: none;
      font-weight: 500;
  }

  .mobile-nav .language-toggle {
      margin-top: 40px;
  }

  /* Hamburger menu styles */
  .hamburger-menu {
      display: none;
      flex-direction: column;
      cursor: pointer;
      z-index: 1200;
  }

  .hamburger-menu .bar {
      width: 25px;
      height: 3px;
      background-color: #191F28;
      margin: 4px 0;
      transition: 0.4s;
  }

  .language-toggle {
      display: flex;
      align-items: center;
      background-color: rgba(33, 150, 243, 0.1);
      border-radius: 20px;
      padding: 4px;
      margin-left: 16px;
  }

  .language-toggle label {
      padding: 6px 12px;
      border-radius: 16px;
      cursor: pointer;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
  }

  .language-toggle label[for="korean"],
  .language-toggle label[for="korean-mobile"] {
      background-color: var(--primary);
      color: white;
  }

  .language-toggle input {
      display: none;
  }

  /* 모바일 대응 */
  @media (max-width: 700px) {
      .nav-links {
          display: none;
      }

      .mobile-nav .language-toggle {
          margin-top: 40px;
      }
  }

  /* Hamburger Menu */
  .hamburger-menu {
      display: none;
      flex-direction: column;
      cursor: pointer;
      z-index: 1100;
  }

  .hamburger-menu .bar {
      width: 25px;
      height: 3px;
      background-color: var(--text-primary);
      margin: 3px 0;
      transition: 0.4s;
  }

  .mobile-nav {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: white;
      z-index: 1000;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      transform: translateX(100%);
      transition: transform 0.3s ease-in-out;
  }

  .mobile-nav.active {
      transform: translateX(0);
  }

  .mobile-nav a {
      font-size: 20px;
      margin: 20px 0;
      color: var(--text-primary);
      text-decoration: none;
  }

  /* Responsive adjustments */
  @media (max-width: 700px) {
      .nav-links {
          display: none;
      }

      .hamburger-menu {
          display: flex;
      }

      .mobile-nav {
          display: flex;
      }

      /* Hamburger menu animation */
      .hamburger-menu.active .bar:nth-child(1) {
          transform: rotate(-45deg) translate(-5px, 6px);
      }

      .hamburger-menu.active .bar:nth-child(2) {
          opacity: 0;
      }

      .hamburger-menu.active .bar:nth-child(3) {
          transform: rotate(45deg) translate(-5px, -6px);
      }
  }