:root {
  --bg: #0a1628;
  --bg-gradient: linear-gradient(135deg, #0a1628 0%, #0f2035 50%, #0a1628 100%);
  --fg: #e0e7ef;
  --fg-muted: #8b9eb3;
  --accent: #7FA7C6;
  --accent-bright: #BEE0F7;
  --primary: #1C3C60;
  --orange: #DD8545;
  --orange-light: #E39B54;
  --border: rgba(127, 167, 198, 0.2);
  --card-bg: rgba(15, 32, 53, 0.8);
  --card-bg-hover: rgba(28, 60, 96, 0.4);
  --success: #3fb950;
  --warning: #d29922;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.2);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--fg);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

/* Navigation */
nav {
  margin-bottom: 2.5rem;
}

nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  background: var(--card-bg);
  border: 1px solid var(--border);
}

nav a:hover {
  color: var(--accent-bright);
  background: var(--card-bg-hover);
  border-color: var(--accent);
  transform: translateX(-2px);
}

nav a svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

nav a:hover svg {
  transform: translateX(-2px);
}

/* Headings */
h1 {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 img {
  height: 36px;
  width: 36px;
  border-radius: var(--radius-sm);
}

.subtitle {
  color: var(--fg-muted);
  margin-bottom: 2.5rem;
  font-size: 1.1rem;
}

h2 {
  margin: 3rem 0 1.5rem;
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

h2::before {
  content: '';
  width: 4px;
  height: 1.2em;
  background: linear-gradient(180deg, var(--accent-bright), var(--accent));
  border-radius: 2px;
}

h3 {
  margin: 2rem 0 1rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fg);
}

p {
  margin: 1rem 0;
  color: var(--fg-muted);
}

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

a:hover {
  color: var(--orange-light);
}

/* Code */
code {
  background: rgba(127, 167, 198, 0.15);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.85em;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  color: var(--accent-bright);
}

pre {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.25rem 0;
  box-shadow: var(--shadow-sm);
}

pre code {
  background: none;
  padding: 0;
  color: var(--fg);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* Notes/Callouts */
.note {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 1.5rem 0;
  position: relative;
  overflow: hidden;
}

.note::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent);
}

.note-title {
  font-weight: 600;
  color: var(--accent-bright);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.recommended {
  border-color: rgba(63, 185, 80, 0.3);
}

.recommended::before {
  background: var(--success);
}

.recommended .note-title {
  color: var(--success);
}

/* Tables */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.5rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th, td {
  text-align: left;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--card-bg);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-muted);
}

td {
  background: rgba(15, 32, 53, 0.4);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: var(--card-bg);
}

/* Lists */
ol, ul {
  margin: 1rem 0 1rem 1.5rem;
  color: var(--fg-muted);
}

li {
  margin: 0.5rem 0;
  padding-left: 0.5rem;
}

li::marker {
  color: var(--accent);
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  padding-right: 3rem;
  text-decoration: none;
  color: var(--fg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card:hover::before {
  opacity: 1;
}

.card h3 {
  color: var(--fg);
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h3 img {
  height: 20px;
  width: auto;
  object-fit: contain;
}

.card:hover h3 {
  color: var(--accent-bright);
}

.card p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin: 0;
  line-height: 1.5;
}

.card .arrow {
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: all 0.3s ease;
  color: var(--accent-bright);
}

.card:hover .arrow {
  opacity: 1;
  transform: translateY(-50%) translateX(4px);
}

/* Header */
header {
  text-align: center;
  padding: 4rem 0 3rem;
}

header img.logo {
  max-width: 400px;
  width: 100%;
  margin-bottom: 1rem;
  filter: drop-shadow(0 4px 24px rgba(0, 0, 0, 0.3));
}

header p {
  color: var(--fg-muted);
  font-size: 1.2rem;
  margin: 0;
}

.badges {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badges a {
  transition: transform 0.2s ease;
}

.badges a:hover {
  transform: translateY(-2px);
}

.badges img {
  height: 20px;
  border-radius: 4px;
}

/* Footer */
.footer {
  text-align: center;
  margin-top: 4rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
}

.footer a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.footer a:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* SVG Icons */
.icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.icon-sm {
  width: 16px;
  height: 16px;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.container > * {
  animation: fadeIn 0.4s ease forwards;
}

/* Responsive */
@media (max-width: 640px) {
  .container {
    padding: 1.5rem;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  h2 {
    font-size: 1.2rem;
  }
  
  header {
    padding: 2rem 0;
  }
  
  header img.logo {
    max-width: 280px;
  }
  
  .cards {
    grid-template-columns: 1fr;
  }
}