:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #5f5f5f;
  --color-accent: #2b6cb0;
  --color-accent-dark: #1e4e80;
  --color-border: #e5e5e5;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.logo:hover {
  text-decoration: none;
}

.nav a {
  margin-left: 1.5rem;
  color: var(--color-text);
  font-weight: 500;
}

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

/* Hero */
.hero {
  padding: 6rem 0;
  text-align: center;
  background-color: #f7f9fc;
}

.hero h1 {
  font-size: 2.75rem;
  margin: 0 0 0.75rem;
}

.hero .subtitle {
  font-size: 1.125rem;
  color: var(--color-muted);
  margin: 0 0 2rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  background-color: var(--color-accent);
  color: #fff;
  border-radius: 6px;
  font-weight: 600;
}

.btn:hover {
  background-color: var(--color-accent-dark);
  text-decoration: none;
}

/* Features */
.features {
  padding: 4rem 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.feature-card h3 {
  margin-top: 0;
}

/* About / Contact */
.about,
.contact {
  padding: 4rem 0;
  border-top: 1px solid var(--color-border);
}

.about h2,
.contact h2 {
  margin-top: 0;
}

/* Footer */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-muted);
  font-size: 0.875rem;
}