/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--wide {
  max-width: var(--container-wide);
}

.container--full {
  max-width: var(--container-full);
}

/* Site header / Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(245, 245, 239, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--transition-base);
}

.site-header__inner {
  max-width: var(--container-full);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__logo {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-header__logo svg {
  width: 20px;
  height: 20px;
}

.site-header__nav {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-header__nav a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-header__nav a:hover,
.site-header__nav a.active {
  color: var(--color-text);
}

/* Hero */
.hero {
  padding-top: calc(var(--space-4xl) + 60px);
  padding-bottom: var(--space-3xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero h1 {
  margin-bottom: var(--space-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero .subtitle {
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.hero__meta {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.hero__tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-monarch-bg);
  color: var(--color-monarch);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 100px;
  margin-bottom: var(--space-xl);
}

/* Sections */
.section {
  padding: var(--section-padding) 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--dark {
  background: var(--color-dark);
  color: #E8E6E3;
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: #FFFFFF;
}

.section--dark .section-label {
  color: var(--color-monarch-light);
}

.section--dark .lead {
  color: #B8B6B2;
}

.section__header {
  margin-bottom: var(--space-2xl);
}

.section__header h2 {
  margin-bottom: var(--space-lg);
}

/* Two-column layout for wider sections */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* Sticky TOC (desktop) */
.toc {
  display: none;
}

@media (min-width: 1200px) {
  .toc {
    display: block;
    position: fixed;
    left: max(calc((100vw - var(--container-full)) / 2 - 30px), 20px);
    top: 120px;
    width: 180px;
    z-index: 50;
  }

  .toc__list {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .toc__item {
    margin-bottom: var(--space-sm);
  }

  .toc__link {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    text-decoration: none;
    display: block;
    padding: 2px 0 2px 12px;
    border-left: 2px solid transparent;
    transition: all var(--transition-fast);
    line-height: 1.4;
  }

  .toc__link:hover {
    color: var(--color-text-secondary);
  }

  .toc__link.active {
    color: var(--color-monarch);
    border-left-color: var(--color-monarch);
  }
}

/* Footer */
.site-footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.site-footer p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.site-footer__disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  max-width: 500px;
  margin: var(--space-md) auto 0;
  font-style: italic;
}

/* Responsive nav */
@media (max-width: 640px) {
  .site-header__nav {
    gap: var(--space-md);
  }

  .site-header__nav a {
    font-size: var(--text-xs);
  }
}