:root {
  --text: #2b2b2b;
  --muted: #666;
  --accent: #ab0707;
  --quote: #c23b3b;
  --rule: #e6e6e6;
  --panel: #f6f5f4;
  --radius: 6px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: #fff;
  color: var(--text);
  font: 15px/1.7 "Open Sans", Helvetica, Arial, sans-serif;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--text);
  transition: color 0.15s, background-color 0.15s;
}

a:hover,
a:focus {
  color: var(--accent);
}

h1,
h3,
h6 {
  margin: 0 0 0.6em;
  font-weight: normal;
  line-height: 1.3;
}

h1 {
  font-size: 30px;
}

h3 {
  font-size: 19px;
}

p {
  margin: 0 0 1.1em;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1;
  background: rgb(255 255 255 / 0.95);
  border-bottom: 1px solid var(--rule);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 80px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.logo {
  display: block;
  line-height: 0;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: block;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--accent);
  color: #fff;
}

/* Main layout */

.page {
  display: grid;
  grid-template-columns: minmax(0, 620px) 280px;
  justify-content: space-between;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 64px;
}

.content h1 {
  margin-bottom: 0.9em;
}

.content h6 {
  margin-top: 2em;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.content h6:first-of-type {
  margin-top: 0;
}

.content ul {
  margin: 0 0 1.5em;
  padding-left: 1.3em;
}

.content li {
  margin-bottom: 0.4em;
}

.content strong a {
  color: var(--accent);
  text-underline-offset: 3px;
}

.content blockquote {
  margin: 1.5em 0;
  padding-left: 20px;
  border-left: 3px solid var(--accent);
  color: var(--quote);
  font-size: 19px;
  font-style: italic;
  font-weight: 300;
  line-height: 1.5;
}

.content blockquote p:last-child {
  margin-bottom: 0;
}

/* Sidebar */

.sidebar {
  align-self: start;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--panel);
}

.sidebar h3 {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
}

.sidebar ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar li + li {
  margin-top: 10px;
}

.sidebar a {
  font-size: 14px;
  text-decoration: none;
}

.sidebar a[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

/* Footer */

.site-footer {
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
}

.site-footer .container {
  padding-top: 28px;
  padding-bottom: 28px;
}

@media (max-width: 767px) {
  .site-header {
    position: static;
  }

  .site-header .container {
    justify-content: center;
  }

  .page {
    grid-template-columns: 1fr;
    padding-top: 32px;
  }

  h1 {
    font-size: 26px;
  }
}