@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600&display=swap');

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

:root {
  --primary: #2C3E50;
  --primary-light: #3D566E;
  --secondary: #E67E22;
  --secondary-light: #F39C4D;
  --accent: #1ABC9C;
  --text-primary: #2C3E50;
  --text-secondary: #7F8C8D;
  --background: #F8F9FA;
  --surface: #FFFFFF;
  --divider: #ECF0F1;
  --sign-background: #FFFDF5;
  --sign-border: #5D4037;
}

body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--background);
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: var(--surface);
  min-height: 100vh;
}

/* Header - Traditional Korean Sign Style */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  margin-bottom: 30px;
  border-bottom: 3px solid var(--primary);
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary);
  padding: 8px 20px;
  background-color: var(--sign-background);
  border: 3px solid var(--sign-border);
  border-radius: 4px;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

/* Language Selector */
.lang-selector {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background-color: var(--surface);
  border: 2px solid var(--secondary);
  border-radius: 8px;
  color: var(--secondary);
  font-size: 0.9rem;
  font-weight: 400;
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  background-color: rgba(230, 126, 34, 0.1);
}

.lang-btn svg {
  width: 16px;
  height: 16px;
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--surface);
  border: 1px solid var(--divider);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  z-index: 100;
}

.lang-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  width: 100%;
  padding: 12px 24px;
  text-align: left;
  background: none;
  border: none;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.lang-option:hover {
  background-color: var(--background);
}

.lang-option.active {
  background-color: rgba(230, 126, 34, 0.1);
  color: var(--secondary);
  font-weight: 500;
}

/* Content Sections */
.content-section {
  display: none;
}

.content-section.active {
  display: block;
}

/* Typography */
h2 {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--primary);
  margin: 36px 0 16px 0;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--secondary);
}

h2:first-child {
  margin-top: 0;
}

h3 {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--primary);
  margin: 24px 0 12px 0;
}

h4 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin: 16px 0 8px 0;
}

p {
  margin-bottom: 14px;
  color: var(--text-primary);
}

ul, ol {
  margin: 14px 0;
  padding-left: 28px;
}

li {
  margin-bottom: 10px;
  color: var(--text-primary);
}

a {
  color: var(--secondary);
  text-decoration: none;
  font-weight: 400;
}

a:hover {
  text-decoration: underline;
}

/* Info Box - Traditional Pattern Style */
.info-box {
  background: linear-gradient(135deg, var(--sign-background) 0%, #FFF9E6 100%);
  border-left: 5px solid var(--secondary);
  padding: 18px 24px;
  margin: 24px 0;
  border-radius: 0 12px 12px 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.info-box p {
  margin: 0;
  color: var(--text-primary);
  font-weight: 400;
}

/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

th, td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--divider);
}

th {
  background-color: var(--primary);
  color: white;
  font-weight: 500;
}

tr:nth-child(even) {
  background-color: var(--background);
}

/* Footer */
footer {
  margin-top: 60px;
  padding: 24px 0;
  border-top: 3px solid var(--primary);
  text-align: center;
}

footer p {
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

footer a {
  color: var(--secondary);
}

/* App Info Card */
.app-info {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--background);
  border-radius: 12px;
  margin-bottom: 24px;
}

.app-icon {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.app-details h3 {
  margin: 0 0 4px 0;
  font-size: 1.1rem;
}

.app-details p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* FAQ Style */
.faq-item {
  margin-bottom: 20px;
  padding: 16px 20px;
  background: var(--background);
  border-radius: 12px;
  border-left: 4px solid var(--accent);
}

.faq-item h4 {
  margin: 0 0 8px 0;
  color: var(--primary);
}

.faq-item p {
  margin: 0;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 600px) {
  .container {
    padding: 16px;
  }

  header {
    flex-direction: column;
    gap: 16px;
    padding: 16px 0;
  }

  h1 {
    font-size: 1.25rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  .app-info {
    flex-direction: column;
    text-align: center;
  }
}