:root {
  --py-bg2: #101722;
  --py-bg3: #162334;
  --py-border: #29425d;
  --py-text: #d5e7f8;
  --py-muted: #88a5c2;
  --py-accent: #ffd43b;
  --py-accent2: #75b8ff;
  --py-accent3: #55d18a;
}

body {
  background: var(--bg);
  color: var(--py-text);
}

header {
  border-bottom: 1px solid var(--py-border);
  padding: 1.1rem 0;
  background: rgba(8, 11, 15, 0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-name {
  color: var(--py-accent);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: -0.03em;
}

.site-name span {
  color: var(--py-muted);
}

nav a {
  color: var(--py-muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  margin-left: 1.2rem;
  letter-spacing: 0.08em;
  transition: color 0.15s;
}

nav a:hover {
  color: var(--py-accent);
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 1.2rem 5rem;
}

.post-meta {
  color: var(--py-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  margin-bottom: 2rem;
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  align-items: center;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.tag {
  border: 1px solid var(--py-border);
  padding: 0.15rem 0.4rem;
}

.tag.green {
  color: var(--py-accent3);
  border-color: rgba(85, 209, 138, 0.45);
}

h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.8vw, 2.5rem);
  line-height: 1.2;
  margin-bottom: 0.8rem;
  letter-spacing: -0.03em;
}

h1 .dim {
  color: var(--py-muted);
  font-weight: 400;
}

.subtitle {
  color: var(--py-muted);
  font-size: 1rem;
  margin-bottom: 1.6rem;
  max-width: 680px;
}

.terminal-intro {
  background: #0c1521;
  border: 1px solid var(--py-border);
  border-left: 3px solid var(--py-accent);
  padding: 1.2rem 1.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.95;
  margin-bottom: 2.2rem;
}

.prompt {
  color: var(--py-accent);
}

.cmd-text {
  color: var(--py-accent2);
}

.output {
  color: var(--py-muted);
  padding-left: 1rem;
}

.toc {
  background: var(--py-bg2);
  border: 1px solid var(--py-border);
  padding: 1.1rem 1.3rem;
  margin-bottom: 2rem;
}

.toc-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--py-muted);
  margin-bottom: 0.65rem;
}

.toc a {
  display: block;
  color: var(--py-text);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.77rem;
  padding: 0.19rem 0;
  transition: color 0.15s;
}

.toc a::before {
  content: '-> ';
  color: var(--py-muted);
}

.toc a:hover {
  color: var(--py-accent);
}

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

h2 {
  font-family: var(--font-mono);
  color: var(--py-accent);
  font-size: 1rem;
  margin: 2.2rem 0 0.95rem;
  letter-spacing: 0.02em;
}

h2::before {
  content: '## ';
  color: #3e5773;
}

h3 {
  font-family: var(--font-mono);
  color: var(--py-accent2);
  font-size: 0.84rem;
  margin-bottom: 0.6rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

p {
  color: var(--py-text);
  line-height: 1.75;
  margin-bottom: 0.95rem;
}

.code-block {
  background: #0d1826;
  border: 1px solid var(--py-border);
  border-left: 3px solid var(--py-accent2);
  padding: 1rem 1.2rem;
  margin: 1rem 0;
  position: relative;
  overflow-x: auto;
}

.code-block.compact {
  margin: 0.7rem 0 0;
}

.code-block .label {
  position: absolute;
  right: 0.7rem;
  top: 0.48rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--py-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.code-block pre {
  font-family: var(--font-mono);
  font-size: 0.77rem;
  line-height: 1.85;
  color: var(--py-text);
}

.cmd {
  color: var(--py-accent2);
}

.str {
  color: #8ee59d;
}

.cmt {
  color: var(--py-muted);
}

.callout {
  background: var(--py-bg2);
  border: 1px solid var(--py-border);
  border-left: 3px solid var(--py-accent);
  padding: 0.95rem 1.1rem;
  margin: 1.25rem 0;
  line-height: 1.7;
}

.callout.warn {
  border-left-color: #ff6b6b;
}

.callout.info {
  border-left-color: var(--py-accent2);
}

.callout-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--py-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.36rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.panel {
  background: var(--py-bg2);
  border: 1px solid var(--py-border);
  padding: 1rem;
}

.practice-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.practice-list li {
  background: #101d2d;
  border: 1px solid var(--py-border);
  padding: 0.72rem 0.85rem;
  line-height: 1.65;
}

kbd,
code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: #1a2c43;
  border: 1px solid #355478;
  border-radius: 4px;
  color: #b9d9ff;
  padding: 0.08rem 0.32rem;
}

footer {
  border-top: 1px solid var(--py-border);
  max-width: 860px;
  margin: 0 auto;
  padding: 1.6rem 1.2rem 2.8rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--py-muted);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

footer a {
  color: var(--py-accent2);
  text-decoration: none;
}

footer a:hover {
  color: var(--py-accent);
}

@media (max-width: 760px) {
  nav a {
    margin-left: 0.7rem;
    font-size: 0.67rem;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}