:root {
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --background-color: #f8fafc;
  --text-color: #1e293b;
  --card-background: #ffffff;
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Noto Sans KR', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.header {
  background-color: var(--card-background);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo i {
  font-size: 1.8rem;
}

.login-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.login-btn {
  background-color: var(--primary-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

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

.main-content {
  max-width: 1200px;
  margin: 5.5rem auto 2rem;
  padding: 0 2rem;
  flex: 1;
}

.hero-section {
  text-align: center;
  margin-bottom: 4rem;
}

.hero-section h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.hero-section p {
  font-size: 1.1rem;
  color: #64748b;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.feature-card {
  background-color: var(--card-background);
  padding: 2rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  color: var(--text-color);
  transition: var(--transition);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 12px rgba(0, 0, 0, 0.1);
}

.feature-card i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.feature-card h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: #64748b;
}

.footer {
  text-align: center;
  padding: 1.2rem 0 1.5rem 0;
  margin-top: 0;
  background-color: var(--card-background);
  color: #64748b;
}

@media (max-width: 768px) {
  .header-content {
    padding: 1rem;
  }

  .main-content {
    padding: 0 1rem;
    margin-top: 5rem;
  }

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

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