:root {
  color-scheme: light;
  --background: #f9f8f4;
  --ink: #292d30;
  --muted: #61686b;
  --accent: #55768b;
}

* {
  box-sizing: border-box;
}

html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
  background: var(--background);
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: #dce7e9;
  color: #263b48;
}

.page-shell {
  width: min(100% - 96px, 760px);
  margin: 0 auto;
  overflow-wrap: break-word;
}

.masthead {
  padding-top: 42px;
}

.wordmark {
  color: var(--accent);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.intro {
  padding: 88px 0 58px;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(2.125rem, 4vw, 2.875rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.subtitle {
  margin: 0;
  color: #4a5358;
  font-size: 1.25rem;
  line-height: 1.65;
}

.about-section + .about-section {
  margin-top: 42px;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.375rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.02em;
}

.about-section p {
  margin: 0;
  color: var(--muted);
  font-size: 1.0625rem;
  line-height: 1.85;
}

.personal-note {
  margin: 46px 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

footer {
  padding: 70px 0 34px;
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .page-shell {
    width: calc(100% - 48px);
  }

  .masthead {
    padding-top: 28px;
  }

  .intro {
    padding: 56px 0 40px;
  }

  .subtitle {
    font-size: 1.125rem;
  }

  .about-section + .about-section {
    margin-top: 34px;
  }

  .about-section p {
    font-size: 1rem;
  }

  .personal-note {
    margin-top: 36px;
  }

  footer {
    padding-top: 48px;
  }
}

a { color: var(--accent); text-underline-offset: 0.2em; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }