body {
  background: white;
}

/* Header */
.site-header {
  background: white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.site-header nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 22px;
  font-weight: bold;
  color: var(--primary-green);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary-green), var(--accent-red));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 20px;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  transition: color 0.3s;
}

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

.login-link {
  background: var(--primary-green);
  color: white !important;
  padding: 8px 24px;
  border-radius: 6px;
}

.login-link:hover {
  background: var(--primary-green-dark);
}

/* Hero */
.hero {
  margin-top: 70px;
  min-height: 80vh;
  background: linear-gradient(135deg, #1a4a1e 0%, #2E7D32 50%, #1976D2 100%);
  display: flex;
  align-items: center;
  color: white;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 20px;
}

.hero h1 {
  font-size: 44px;
  margin-bottom: 20px;
  font-weight: 700;
  line-height: 1.3;
}

.hero .subtitle {
  font-size: 20px;
  margin-bottom: 40px;
  font-weight: 300;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-buttons .btn {
  padding: 14px 36px;
  font-size: 16px;
  border-radius: 30px;
}

/* Features */
.features {
  padding: 80px 20px;
  background: white;
}

.section-title {
  text-align: center;
  font-size: 32px;
  margin-bottom: 50px;
  color: var(--text-dark);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  text-align: center;
  padding: 30px 20px;
  border-radius: 12px;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.feature-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  background: var(--light-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
}

.feature-card:nth-child(2) .feature-icon {
  background: var(--light-red);
}

.feature-card:nth-child(3) .feature-icon {
  background: var(--light-blue);
}

.feature-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-gray);
  line-height: 1.8;
  font-size: 15px;
}

/* Data Preview */
.data-preview {
  padding: 80px 20px;
  background: var(--bg-gray);
}

.section-subtitle {
  text-align: center;
  color: var(--text-gray);
  font-size: 16px;
  margin-top: -36px;
  margin-bottom: 48px;
  line-height: 1.7;
}

.preview-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto 40px;
}

.preview-card {
  background: white;
  border-radius: 12px;
  padding: 20px 16px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: transform 0.2s;
}

.preview-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.1);
}

.preview-card-icon {
  font-size: 28px;
  margin-bottom: 6px;
}

.preview-card-label {
  font-size: 13px;
  color: var(--text-gray);
  margin-bottom: 6px;
}

.preview-card-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.2;
}

.preview-card-value span {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-gray);
  margin-left: 2px;
}

.preview-card-status {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.preview-card-status.good {
  background: #E8F5E9;
  color: #2E7D32;
}

.preview-chart-wrapper {
  max-width: 1200px;
  margin: 0 auto 40px;
  background: white;
  border-radius: 12px;
  padding: 28px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.preview-chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.preview-chart-header h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-dark);
}

.preview-badge {
  font-size: 11px;
  padding: 4px 10px;
  background: var(--light-blue);
  color: var(--tech-blue);
  border-radius: 4px;
  font-weight: 500;
}

.preview-chart-container {
  position: relative;
  height: 260px;
}

.preview-cta {
  text-align: center;
}

.preview-cta .btn {
  padding: 14px 40px;
  font-size: 16px;
  border-radius: 30px;
}

/* Footer */
.site-footer {
  background: var(--text-dark);
  color: white;
  padding: 40px 20px 20px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-inner p {
  color: #999;
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  color: #ccc;
  font-size: 14px;
  transition: color 0.3s;
}

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

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 28px;
  }

  .hero .subtitle {
    font-size: 16px;
  }

  .nav-links {
    display: none;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .preview-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .preview-chart-container {
    height: 200px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .preview-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .preview-card {
    padding: 14px 10px;
  }

  .preview-card-value {
    font-size: 22px;
  }
}