/* Basic reset */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background: #ffffff;
  color: #111111;
}

/* Links */
a {
  color: #0056b3;
  text-decoration: underline;
}

a:hover,
a:focus {
  text-decoration: none;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 0;
  top: 0;
  width: auto;
  height: auto;
  padding: 0.75rem 1rem;
  background: #0b3d91;
  color: #ffffff;
  z-index: 1000;
}

/* Layout helpers */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.site-header {
  background: #0b3d91;
  color: #ffffff;
  padding: 1rem 0 1.5rem;
}

.site-header h1 {
  margin: 0;
  font-size: 2rem;
}

.tagline {
  margin: 0.25rem 0 1rem;
  font-size: 1rem;
}

/* Navigation */
.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.nav-list a {
  color: #ffffff;
  font-weight: 600;
}

.nav-list a:hover,
.nav-list a:focus {
  text-decoration: underline;
}

/* Sections */
.section {
  padding: 2.5rem 0;
}

.section-alt {
  background: #f5f5f7;
}

.section h2 {
  font-size: 1.5rem;
  margin-top: 0;
}

/* Projects */
.project-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.project-list li {
  margin-bottom: 1.5rem;
}

/* Footer */
.site-footer {
  background: #111111;
  color: #ffffff;
  text-align: center;
  padding: 1rem 0;
  font-size: 0.875rem;
}

/* Small screens */
@media (max-width: 600px) {
  .nav-list {
    flex-direction: column;
  }
}