/* ===== RESET & BASE ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0d0d0d;
  --bg-card: #161616;
  --bg-code: #1a1a1a;
  --border: #2a2a2a;
  --neon: #39ff14;
  --neon-dim: #1a7a0a;
  --text: #cccccc;
  --text-muted: #888888;
  --white: #e0e0e0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'IBM Plex Mono', 'Fira Code', 'Courier New', monospace;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}

a {
  color: var(--neon);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--white);
}

/* ===== LAYOUT ===== */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== HEADER ===== */
header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  position: sticky;
  top: 0;
  background-color: var(--bg);
  z-index: 100;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--neon);
  letter-spacing: 2px;
}

.logo span {
  color: var(--text-muted);
  font-weight: 400;
}

nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

nav a {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

nav a:hover, nav a.active {
  color: var(--neon);
}

/* ===== HERO ===== */
.hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: 2rem;
  color: var(--white);
  margin-bottom: 10px;
}

.hero p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 600px;
}

/* ===== TOPIC SECTIONS ===== */
.topics {
  padding: 40px 0;
}

.topic-section {
  margin-bottom: 50px;
}

.topic-section h2 {
  font-size: 1.3rem;
  color: var(--neon);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.topic-section h2 .icon {
  font-size: 1rem;
  opacity: 0.7;
}

.topic-description {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

/* ===== CARDS ===== */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  padding: 18px 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: var(--neon-dim);
}

.card-info h3 {
  font-size: 0.95rem;
  color: var(--white);
  margin-bottom: 4px;
}

.card-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.card-meta {
  text-align: right;
  flex-shrink: 0;
  margin-left: 20px;
}

.card-meta .tag {
  font-size: 0.7rem;
  color: var(--neon);
  border: 1px solid var(--neon-dim);
  padding: 2px 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.card-meta .read-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ===== POST PAGE ===== */
.post-header {
  padding: 50px 0 30px;
  border-bottom: 1px solid var(--border);
}

.post-header .breadcrumb {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.post-header .breadcrumb a {
  color: var(--text-muted);
}

.post-header .breadcrumb a:hover {
  color: var(--neon);
}

.post-header h1 {
  font-size: 1.6rem;
  color: var(--white);
  margin-bottom: 10px;
}

.post-meta-info {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 20px;
}

.post-content {
  padding: 40px 0 60px;
}

.post-content h2 {
  font-size: 1.2rem;
  color: var(--neon);
  margin: 30px 0 12px;
}

.post-content h3 {
  font-size: 1rem;
  color: var(--white);
  margin: 24px 0 10px;
}

.post-content p {
  margin-bottom: 16px;
}

.post-content ul, .post-content ol {
  margin: 0 0 16px 24px;
}

.post-content li {
  margin-bottom: 6px;
}

.post-content code {
  background-color: var(--bg-code);
  color: var(--neon);
  padding: 2px 6px;
  font-size: 0.9em;
}

.post-content pre {
  background-color: var(--bg-code);
  border: 1px solid var(--border);
  padding: 16px 20px;
  overflow-x: auto;
  margin-bottom: 20px;
  line-height: 1.5;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: var(--text);
}

.post-content .output {
  border-left: 3px solid var(--neon-dim);
}

.post-content .tip {
  border-left: 3px solid var(--neon);
  padding: 12px 16px;
  background-color: var(--bg-code);
  margin-bottom: 20px;
}

.post-content .tip strong {
  color: var(--neon);
}

.post-nav {
  display: flex;
  justify-content: space-between;
  padding: 20px 0 40px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

/* ===== TOPIC PAGE ===== */
.topic-header {
  padding: 50px 0 30px;
  border-bottom: 1px solid var(--border);
}

.topic-header h1 {
  font-size: 1.8rem;
  color: var(--white);
  margin-bottom: 8px;
}

.topic-header p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.topic-posts {
  padding: 30px 0 60px;
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 1.4rem;
  }

  header .container {
    flex-direction: column;
    gap: 12px;
  }

  nav {
    justify-content: center;
  }

  .card {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .card-meta {
    text-align: left;
    margin-left: 0;
  }
}