:root {
  --bg-primary: #FFFFFF;
  --bg-offset: #F9FAFB;
  --text-primary: #111827;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --border-color: #E5E7EB;
  --accent: #111827; /* Using black/dark gray as primary accent */
  --accent-lime: #A3E635; /* Used extremely sparingly */
  
  --font-sans: 'Inter', -apple-system, sans-serif;
  --radius-sm: 4px;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.headline {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
  margin-bottom: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.sub-headline {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  font-weight: 400;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.section-label {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 2rem;
}

.large-text {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Layout */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex-row {
  display: flex;
  gap: 4rem;
}

.h-100 { height: 100%; }

.section {
  padding: 6rem 0;
}

.bg-offset {
  background-color: var(--bg-offset);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.border-bottom { border-bottom: 1px solid var(--border-color); }
.border-top { border-top: 1px solid var(--border-color); }
.pt-2 { padding-top: 2rem; }

/* Header */
.site-header {
  height: 64px;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-name {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-lime);
}

.main-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent);
  color: #FFFFFF;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-link {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  margin-top: auto;
}

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

/* Hero Section */
.hero {
  padding: 8rem 0 6rem;
}

.hero-content {
  max-width: 700px;
}

/* About Section */
.text-column {
  flex: 3;
}

.stats-column {
  flex: 2;
  display: flex;
  flex-direction: column;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 1rem 0;
}

.stat-row:first-child {
  padding-top: 0;
}

.stat-label {
  color: var(--text-secondary);
}

.stat-value {
  font-weight: 500;
  color: var(--text-primary);
}

/* Products Section */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.product-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
}

.empty-card {
  background: var(--bg-offset);
  border-style: dashed;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.card-header h3 {
  font-size: 1.125rem;
}

.version-tag {
  font-size: 0.75rem;
  font-family: monospace;
  color: var(--text-muted);
}

.label-muted {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  display: block;
  margin-bottom: 0.5rem;
}

.card-body p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.feature-list {
  list-style: none;
  margin-bottom: 2rem;
}

.feature-list li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1rem;
}

.feature-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

/* Contact Section */
.contact-info {
  flex: 1;
}

.contact-form-wrapper {
  flex: 1.5;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input, .form-group textarea {
  border: 1px solid var(--border-color);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-primary);
  background: var(--bg-primary);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--text-secondary);
}

.form-status {
  margin-top: 1.5rem;
}

.success-message {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.hidden {
  display: none;
}

/* Footer */
.site-footer {
  padding: 2rem 0 4rem;
}

.copyright {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .flex-row {
    flex-direction: column;
    gap: 3rem;
  }
  .main-nav {
    display: none;
  }
  .hero {
    padding: 4rem 0;
  }
}