/* Op Null — opnull.com */

:root {
  --paper: #ece4d3;
  --paper-shadow: #d8cfba;
  --ink: #1a1612;
  --ink-soft: #4a3f33;
  --rule: #b8a888;
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { background: var(--paper-shadow); }
body {
  font-family: var(--serif);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  background: var(--paper);
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.18);
  min-height: 100vh;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  border-bottom: 1px solid var(--rule);
}

.mark {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.mark img { width: 44px; height: 44px; display: block; }
.mark span {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

nav a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  margin-left: 28px;
}
nav a:hover { color: var(--ink); }

.hero {
  padding: 32px 32px 40px;
  text-align: center;
}
.hero img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.body {
  padding: 16px 48px 64px;
  max-width: 720px;
  margin: 0 auto;
}

.lede {
  font-size: 22px;
  line-height: 1.45;
  font-style: italic;
  margin: 0 0 32px 0;
}

.body p {
  font-size: 17px;
  margin: 0 0 18px 0;
}

.body ul {
  font-size: 17px;
  margin: 0 0 18px 0;
  padding-left: 1.4em;
  list-style: none;
}
.body li {
  position: relative;
  margin: 0 0 8px 0;
}
.body li::before {
  content: "—";
  position: absolute;
  left: -1.4em;
  color: var(--ink-soft);
}

.body a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.body h2 {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 36px 0 12px 0;
  border-top: 1px solid var(--rule);
  padding-top: 18px;
}

footer {
  border-top: 1px solid var(--rule);
  padding: 24px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

@media (max-width: 720px) {
  header { padding: 18px 24px; }
  .mark span { display: none; }
  nav a { margin-left: 16px; font-size: 11px; }
  .hero { padding: 16px 16px 24px; }
  .body { padding: 8px 24px 48px; }
  .lede { font-size: 19px; }
  .body p { font-size: 16px; }
  footer {
    padding: 18px 24px;
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
  }
}