* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-matcha-deep);
  font-family: var(--font-body);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* --- header --- */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
}

.site-header__name {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 0;
}

.site-header__nav a {
  margin-left: 2rem;
  text-decoration: none;
  color: var(--color-matcha-deep);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

.site-header__nav a:hover,
.site-header__nav a:focus-visible {
  color: var(--color-matcha);
}

/* --- layout --- */
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: var(--space-section) 0;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.6rem;
  margin: 0 0 2rem;
  letter-spacing: 0.02em;
}

.section-placeholder {
  color: var(--color-matcha);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* --- footer --- */
.site-footer {
  text-align: center;
  padding: 3rem 0;
  font-size: 0.8rem;
  color: var(--color-matcha);
  opacity: 0.7;
}