:root {
  --text: #111;
  --muted: #666;
  --border: #e6e6e6;
  --background: #fafafa;
  --card-bg: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Helvetica,
    Arial,
    sans-serif;

  color: var(--text);
  background: var(--background);
  line-height: 1.5;
}

/* header */

.site-header {
  border-bottom: 1px solid var(--border);
  background: white;
}

.site-header .inner {
  max-width: 900px;
  margin: auto;
  padding: 16px 20px;
}

.logo {
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* hero */

.hero {
  max-width: 720px;
  margin: 80px auto 40px auto;
  padding: 0 20px;
}

.hero h1 {
  font-size: 36px;
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  color: var(--muted);
}

/* projects */

.projects {
  max-width: 720px;
  margin: 40px auto;
  padding: 0 20px;

  display: grid;
  gap: 18px;
}

.project-card {
  display: block;
  text-decoration: none;
  color: inherit;

  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;

  padding: 22px;

  transition:
    transform 0.15s ease,
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.project-card:hover {
  transform: translateY(-2px);
  border-color: #bbb;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}

.project-card h2 {
  margin: 0 0 6px 0;
  font-size: 20px;
}

.project-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* footer */

.footer {
  max-width: 900px;
  margin: 80px auto 40px auto;
  padding: 0 20px;

  color: var(--muted);
  font-size: 14px;
}