*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #000;
  --fg: #e0e0e0;
  --fg-dim: #707070;
  --fg-bright: #fff;
  --link: #909090;
  --link-hover: #fff;
  --border: #222;
  --mono: "SF Mono", "Monaco", "Inconsolata", "Fira Mono", "Droid Sans Mono",
    "Source Code Pro", ui-monospace, monospace;
}

html {
  font-size: 15px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Header --- */

header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}

.header-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-title {
  color: var(--fg-bright);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.site-title:hover {
  color: var(--fg);
}

/* --- Navigation --- */

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  color: var(--fg-dim);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.15s;
}

.nav a:hover {
  color: var(--fg-bright);
}

/* --- Burger --- */

.burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-direction: column;
  gap: 4px;
}

.burger span {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--fg);
  transition: transform 0.2s, opacity 0.2s;
}

.burger.active span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.burger.active span:nth-child(2) {
  opacity: 0;
}

.burger.active span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* --- Main --- */

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  width: 100%;
  flex: 1;
}

/* --- Index page --- */

.index-header {
  margin-bottom: 3rem;
}

.index-header h1 {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--fg-bright);
  margin-bottom: 0.5rem;
}

.index-header p {
  color: var(--fg-dim);
  font-size: 0.8rem;
}

.section {
  margin-bottom: 2.5rem;
}

.section h2 {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.report-list {
  list-style: none;
}

.report-list li {
  margin-bottom: 1rem;
}

.report-list a {
  color: var(--fg);
  text-decoration: none;
  font-size: 0.9rem;
  display: block;
  transition: color 0.15s;
}

.report-list a:hover {
  color: var(--fg-bright);
}

.report-list .date {
  color: var(--fg-dim);
  font-size: 0.75rem;
  margin-top: 0.15rem;
}

/* --- Report pages --- */

.report-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  font-size: 0.75rem;
}

.back {
  color: var(--fg-dim);
  text-decoration: none;
}

.back:hover {
  color: var(--fg-bright);
}

.category {
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

article h1 {
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--fg-bright);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

article h2 {
  font-size: 1rem;
  font-weight: 400;
  color: var(--fg-bright);
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
}

article h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--fg);
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

article h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg-dim);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

article p {
  margin-bottom: 1rem;
  font-size: 0.85rem;
}

article ul, article ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

article li {
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

article a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

article a:hover {
  color: var(--link-hover);
}

article strong {
  color: var(--fg-bright);
  font-weight: 600;
}

article em {
  font-style: italic;
}

article blockquote {
  border-left: 2px solid var(--border);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--fg-dim);
}

article code {
  background: #111;
  padding: 0.15rem 0.4rem;
  font-size: 0.8rem;
  border-radius: 2px;
}

article pre {
  background: #0a0a0a;
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 2px;
}

article pre code {
  background: none;
  padding: 0;
}

article table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.8rem;
}

article th, article td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

article th {
  color: var(--fg-dim);
  font-weight: 400;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
}

article hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* --- Footer --- */

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
}

footer p {
  color: var(--fg-dim);
  font-size: 0.7rem;
}

/* --- Mobile --- */

@media (max-width: 600px) {
  html {
    font-size: 14px;
  }

  .burger {
    display: flex;
  }

  .nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    z-index: 99;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    font-size: 1.1rem;
  }

  main {
    padding: 2rem 1.25rem;
  }
}