/* ===== CSS Custom Properties (Theme) ===== */
:root {
  --julia-blue: #4063d8;
  --julia-green: #389826;
  --julia-purple: #9558b2;
  --julia-red: #cb3c33;
  --gpu-accent: #6c63ff;
  --gpu-accent-light: #8b83ff;

  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-code: #f5f5f5;
  --bg-code-inline: #f0ebf4;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-code-inline: #7c3aed;
  --border-color: #dee2e6;
  --nav-border: #212529;
  --card-bg: #ffffff;
  --card-border: #dee2e6;
  --hero-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  --hero-text: #ffffff;
  --footer-bg: #f8f9fa;
  --footer-text: #6c757d;
  --code-theme-bg: #282c34;
  --code-theme-text: #abb2bf;
}

[data-bs-theme="dark"] {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-code: #282c34;
  --bg-code-inline: #2d2640;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --text-code-inline: #b794f4;
  --border-color: #2d3748;
  --nav-border: #4a5568;
  --card-bg: #16213e;
  --card-border: #2d3748;
  --hero-bg: linear-gradient(135deg, #0d0d1a 0%, #111827 50%, #0a1628 100%);
  --footer-bg: #111827;
  --footer-text: #a0a0a0;
}

/* ===== Base ===== */
body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.2s, color 0.2s;
}

/* ===== Layout ===== */
.container {
  max-width: 860px;
}

#main {
  margin-top: 1em;
  margin-bottom: 4em;
}

/* ===== Navigation ===== */
#nav-border {
  border-bottom: 1px solid var(--nav-border);
  background-color: var(--bg-primary);
}

.navbar {
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.nav-link {
  color: var(--text-primary) !important;
  font-weight: 500;
  transition: color 0.15s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gpu-accent) !important;
}

.dropdown-menu {
  background-color: var(--card-bg);
  border-color: var(--card-border);
}

.dropdown-item {
  color: var(--text-primary);
}

.dropdown-item:hover,
.dropdown-item.active {
  background-color: var(--bg-secondary);
  color: var(--gpu-accent);
}

.dropdown:hover .dropdown-menu {
  display: block;
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  font-size: 1.1rem;
  transition: color 0.15s;
}

.theme-toggle:hover {
  color: var(--gpu-accent);
}

/* ===== Hero Section ===== */
.hero {
  background: var(--hero-bg);
  color: var(--hero-text);
  padding: 4rem 0 3rem;
  margin-bottom: 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.hero .lead {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 1.5rem;
}

.hero-code {
  max-width: 520px;
  margin: 0 auto;
  text-align: left;
}

.hero-code pre {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 1.25rem;
  color: #abb2bf;
  font-size: 0.9rem;
  margin: 0;
  overflow-x: auto;
}

.hero-code pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

/* ===== Code Blocks ===== */
pre code.hljs {
  padding: 0;
  background: 0 0;
}

pre {
  background-color: var(--code-theme-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  color: var(--code-theme-text);
}

code {
  padding: 2px 6px;
  font-size: 87.5%;
  color: var(--text-code-inline);
  background-color: var(--bg-code-inline);
  border-radius: 4px;
}

pre code {
  color: inherit;
}

/* ===== Cards ===== */
.card {
  background-color: var(--card-bg);
  border-color: var(--card-border);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.15s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card-img,
.card-img-top,
.card-img-bottom {
  width: initial;
}

.card-body {
  color: var(--text-primary);
}

/* ===== Blog Post Cards ===== */
.blog-entry {
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  background-color: var(--card-bg);
  transition: transform 0.15s, box-shadow 0.15s;
}

.blog-entry:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.blog-entry a.font-125 {
  color: var(--gpu-accent);
  text-decoration: none;
  font-weight: 600;
}

.blog-entry a.font-125:hover {
  text-decoration: underline;
}

.blog-entry time {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== Backend Comparison Table ===== */
.backend-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.backend-table th,
.backend-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.backend-table thead th {
  background-color: var(--bg-secondary);
  font-weight: 600;
  white-space: nowrap;
}

.backend-table tbody tr:hover {
  background-color: var(--bg-secondary);
}

.badge-mature {
  background-color: var(--julia-green);
  color: #fff;
}

.badge-stable {
  background-color: var(--julia-blue);
  color: #fff;
}

.badge-developing {
  background-color: #f0ad4e;
  color: #212529;
}

.badge-early {
  background-color: var(--text-secondary);
  color: #fff;
}

/* ===== Footer ===== */
#footer {
  background-color: var(--footer-bg);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  color: var(--footer-text);
}

#footer .container {
  padding: 0;
}

#footer a {
  color: var(--gpu-accent);
  text-decoration: none;
}

#footer a:hover {
  text-decoration: underline;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1rem;
  list-style: none;
  padding: 0;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--gpu-accent);
}

/* ===== Utilities ===== */
.font-125 {
  font-size: 125%;
}

.tag-btn {
  margin-bottom: 0.3em;
}

img,
iframe,
embed,
video,
audio {
  max-width: 100%;
}

#main h1 > a,
#main h2 > a,
#main h3 > a {
  color: inherit;
  text-decoration: none;
}

li p {
  margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero {
    padding: 2.5rem 1rem 2rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
}