:root {
  --bg-color: #ffffff;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --border-color: #e5e7eb;
  --accent-color: #2563eb;
  --button-bg: #111827;
  --button-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #0a0a0a;
    --text-primary: #ededed;
    --text-secondary: #a1a1aa;
    --border-color: #27272a;
    --accent-color: #60a5fa;
    --button-bg: #ededed;
    --button-text: #0a0a0a;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

header {
  padding: 2rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.logo {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  margin-left: 2rem;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

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

.hero {
  text-align: left;
  padding: 6rem 5% 4rem;
  max-width: 1000px;
  margin: 0 auto;
}

.badge {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 600px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--button-bg);
  color: var(--button-text);
  padding: 0.875rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: opacity 0.15s ease;
}

.btn:hover {
  opacity: 0.9;
}

.features {
  padding: 4rem 5%;
  max-width: 1100px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: minmax(180px, auto);
  }
  
  .span-2 {
    grid-column: span 2;
  }
  
  .span-3 {
    grid-column: span 3;
  }
  
  .row-span-2 {
    grid-row: span 2;
  }
}

.feature-card {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

@media (prefers-color-scheme: dark) {
  .feature-card {
    background: linear-gradient(145deg, rgba(39, 39, 42, 0.4) 0%, rgba(24, 24, 27, 0.2) 100%);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-color);
  box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.15);
}

.feature-icon {
  margin-bottom: 1.25rem;
  color: var(--accent-color);
  display: inline-flex;
  padding: 10px;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 12px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
  flex-grow: 1;
}

footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 5%;
  text-align: left;
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 1000px;
  margin: 4rem auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

footer a {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  .hero p {
    font-size: 1.1rem;
  }
  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}