:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f6f6;
  --color-text: #111111;
  --color-muted: #666666;
  --color-border: #e0e0e0;
  --color-accent: #000000;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Ubuntu, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

.container {
  max-width: 1100px;
  padding: 0 1.25rem;
  margin: 0 auto;
}

.container.narrow {
  max-width: 720px;
}

.header {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  z-index: 10;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-weight: 700;
}

nav a {
  margin-left: 1rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.hero {
  padding: 5rem 0;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.hero p {
  max-width: 640px;
  color: var(--color-muted);
}

.hero-actions {
  margin-top: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1rem;
  border-radius: 4px;
  font-size: 0.9rem;
  margin-right: 0.75rem;
}

.btn.primary {
  background: var(--color-accent);
  color: #fff;
}

.btn.secondary {
  border: 1px solid var(--color-border);
}

.section {
  padding: 4rem 0;
}

.section.alt {
  background: var(--color-bg-alt);
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 3rem;
  margin-top: 3rem;
}

.highlights-grid h4 {
  margin-bottom: 0.25rem;
}

.highlights-grid p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  border: 1px solid var(--color-border);
  padding: 1.25rem;
  background: #fff;
}

.card h3 {
  margin-top: 0;
}

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

.card p {
  font-size: 0.9rem;
}

.philosophy {
  padding-left: 1rem;
}

blockquote {
  margin-top: 2rem;
  padding-left: 1rem;
  border-left: 3px solid var(--color-border);
  color: var(--color-muted);
}

.muted {
  color: var(--color-muted);
}

.contact-email {
  font-weight: 600;
}

.footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  font-size: 0.8rem;
  color: var(--color-muted);
}

@media (max-width: 640px) {
  nav {
    display: none;
  }
}
@media (max-width: 480px) {
  .hero {
    padding: 3rem 0;
  }
}