:root {
  /* Colors */
  --canvas-bg: #000000;          /* Deepest background */
  --panel-bg: #000000;           /* Component background */
  --panel-text: #ffffff;         /* Primary text */
  --panel-border: #333333;       /* Subtle separators */
  --panel-control-bg: #111111;   /* Button/Card backgrounds */
  --panel-control-bg-hover: #222222; /* Hover state */
  
  /* Accents & Utilities */
  --grid-line: rgba(255, 255, 255, 0.12);
  --text-muted: rgba(255, 255, 255, 0.6);
  --text-faint: rgba(255, 255, 255, 0.3);
  
  /* Typography Weights */
  --fw-thin: 100;
  --fw-light: 200;
  --fw-regular: 300;
  --fw-normal: 400;
  --fw-bold: 500;
  
  /* Layout */
  --max-width: 1000px;
  --section-spacing: 8rem;
  --radius-sm: 4px;
}

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

body {
  background-color: var(--canvas-bg);
  color: var(--panel-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-weight: var(--fw-regular);
  line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: 1.5rem;
  color: var(--panel-text);
}

h1 {
  font-size: 8vw;
  font-weight: var(--fw-thin);
  letter-spacing: 0em;
  line-height: 1.1;
  text-transform: capitalize;
}

h2 {
  font-size: 2rem;
  font-weight: var(--fw-light);
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--panel-border);
  padding-bottom: 0.5rem;
  margin-top: 4rem;
}

h3 {
  font-size: 1.2rem;
  font-weight: var(--fw-normal);
  color: var(--text-muted); /* Using text-muted as proxy for the rgba(255,255,255,0.5) */
  margin-top: 2rem;
}

p {
  margin-bottom: 1.5rem;
  color: rgba(255, 255, 255, 0.8);
}

a {
  color: var(--panel-text);
  text-decoration: none;
  border-bottom: 1px solid var(--panel-border);
  transition: border-color 0.2s;
}

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

code {
  font-family: monospace;
  background: var(--panel-control-bg);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: #ddd;
}

pre {
  background: var(--panel-control-bg);
  padding: 1.5rem;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin-bottom: 2rem;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
  border: none;
}

ul, ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 2rem;
  border: 1px solid var(--panel-border);
}

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

th {
  background: var(--panel-control-bg);
  font-weight: --fw-normal;
  color: var(--text-muted);
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 2rem 3rem; /* Per design system */
  display: flex;
  justify-content: space-between;
  align-items: center;
  mix-blend-mode: difference;
  z-index: 1000;
  background: transparent; /* blend mode handles visibility */
}

nav .logo {
  font-weight: var(--fw-bold);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

nav .links {
  display: flex;
  gap: 2rem;
}

nav a {
  font-weight: 500;
  border-bottom: none;
  opacity: 0.7;
  transition: opacity 0.2s;
}

nav a:hover {
  opacity: 1;
}

/* Hero */
.hero {
  padding-top: 20vh;
  padding-bottom: var(--section-spacing);
  border-bottom: 1px solid var(--panel-border);
  margin-bottom: var(--section-spacing);
}

.hero p.subtitle {
  font-size: 1.5rem;
  font-weight: var(--fw-light);
  color: var(--text-muted);
  max-width: 600px;
}

/* Sections */
section {
  margin-bottom: var(--section-spacing);
  scroll-margin-top: 100px; /* Offset for sticky header if needed, though nav is blend mode */
}

/* Components */
.card {
  background: transparent;
  padding: 2rem;
  border: 1px solid var(--panel-border);
  margin-bottom: 1.5rem;
  transition: transform 0.3s, background 0.3s, border-color 0.3s;
}

.card:hover {
  background: var(--panel-control-bg);
  border-color: var(--panel-text);
  transform: translateY(-5px);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: var(--panel-control-bg);
  color: var(--panel-text);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  font-weight: 500;
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  background: var(--panel-control-bg-hover);
  border-color: var(--panel-text);
}

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

@media (max-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  nav {
    padding: 1.5rem;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  nav .links {
    flex-wrap: wrap;
    gap: 1rem;
  }

  h1 {
    font-size: 14vw;
  }
}