body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 16px;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

section {
  padding: var(--space-4xl) 0;
}

h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  line-height: 1.7;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
}

::selection {
  background: var(--accent-dim);
  color: var(--text-primary);
}

/* Site Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  transition: background var(--transition-base), backdrop-filter var(--transition-base);
}

.site-header.scrolled {
  background: rgba(8, 9, 14, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
  z-index: 10;
}

.logo img {
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a:not(.btn) {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:not(.btn):hover {
  color: var(--text-primary);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: 10;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}