:root {
  --background: #e6eee6;
  --text: #222222;
  --meta: #555555;
  --accent: #6e1e2e;
  --signature: #9a9a9a;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 100%;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: "Source Serif 4", Georgia, serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: 680px;
  margin: 90px auto 80px auto;
  padding: 0 22px;
}

h1 {
  margin: 0 0 3.5rem 0;
  font-family: "Playfair Display", Georgia, serif;
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text);
}

.entry {
  margin: 0 0 2.8rem 0;
}

h2 {
  margin: 0 0 0.35rem 0;
  font-family: "Playfair Display", Georgia, serif;
  font-size: 1.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

h2 a {
  color: var(--accent);
  text-decoration: none;
}

h2 a:hover,
h2 a:focus {
  text-decoration: underline;
  text-underline-offset: 0.08em;
}

/* --- IAD series code (added, minimal, safe) --- */

.series-code {
  margin: 0 0 0.55rem 0;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--meta);
  opacity: 0.9;
  line-height: 1.2;
}

.meta {
  margin: 0;
  color: var(--meta);
  font-size: 0.98rem;
  line-height: 1.5;
}

.signature {
  margin: 4.8rem 0 0 0;
  text-align: center;
  font-size: 0.92rem;
  letter-spacing: 0.12em;
}

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

.signature a:hover,
.signature a:focus {
  color: var(--signature);
  text-decoration: none;
}

/* Mobile */
@media (max-width: 640px) {
  .container {
    max-width: 100%;
    margin: 64px auto 56px auto;
    padding: 0 20px;
  }

  h1 {
    margin: 0 0 2.8rem 0;
    font-size: 2.15rem;
    letter-spacing: 0.12em;
  }

  .entry {
    margin: 0 0 2.35rem 0;
  }

  h2 {
    font-size: 1.42rem;
    letter-spacing: 0.015em;
  }

  .series-code {
    margin: 0 0 0.45rem 0;
  }

  .meta {
    font-size: 0.94rem;
    line-height: 1.45;
  }

  .signature {
    margin-top: 4rem;
    font-size: 0.86rem;
    letter-spacing: 0.10em;
  }
}