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

:root {
  --bg: #0f0f1a;
  --bg-elev: #16162a;
  --bg-card: #1a1a2e;
  --border: #2a2a4a;
  --text: #e6e6ec;
  --text-dim: #a0a0b8;
  --text-faint: #6a6a85;
  --accent: #e94560;
  --accent-soft: rgba(233, 69, 96, 0.18);
  --good: #4ecca3;
  --code-bg: #16162a;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.hero {
  margin-bottom: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

h1 {
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.15;
  margin-bottom: 12px;
  color: #ffffff;
}

.effective {
  font-size: 14px;
  color: var(--text-faint);
}

.tldr {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--good);
  border-radius: 10px;
  padding: 22px 26px;
  margin-bottom: 40px;
}

.tldr h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--good);
  margin-bottom: 12px;
  border-bottom: none;
}

.tldr ul {
  padding-left: 18px;
}

.tldr li {
  margin-bottom: 6px;
  color: var(--text);
}

.tldr li:last-child {
  margin-bottom: 0;
}

section {
  margin-bottom: 36px;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 14px;
  color: #ffffff;
  letter-spacing: -0.2px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 18px;
  margin-bottom: 10px;
  color: var(--text);
  letter-spacing: 0.1px;
}

p {
  margin-bottom: 12px;
  color: var(--text-dim);
}

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  padding-left: 22px;
  margin-bottom: 14px;
  color: var(--text-dim);
}

li {
  margin-bottom: 6px;
}

dl {
  margin-bottom: 14px;
  display: grid;
  grid-template-columns: minmax(0, 220px) 1fr;
  gap: 10px 18px;
}

@media (max-width: 640px) {
  dl {
    grid-template-columns: 1fr;
    gap: 4px 0;
  }
  dl dt {
    margin-top: 12px;
  }
}

dt {
  color: var(--text);
  font-weight: 600;
}

dt code {
  font-weight: 400;
}

dd {
  color: var(--text-dim);
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s, color 0.15s;
}

a:hover {
  border-bottom-color: var(--accent);
  color: #ff5e7a;
}

strong {
  color: var(--text);
  font-weight: 600;
}

em {
  font-style: italic;
  color: var(--text);
}

code {
  font-family: "JetBrains Mono", "Fira Code", "Consolas", "Courier New",
    monospace;
  font-size: 0.92em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: #c9c9e0;
  word-break: break-word;
}

footer {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-faint);
  text-align: center;
}

footer a {
  color: var(--text-dim);
  border-bottom-color: var(--border);
}

footer a:hover {
  color: var(--text);
  border-bottom-color: var(--text-dim);
}

::selection {
  background: var(--accent-soft);
  color: #ffffff;
}