:root {
  /* Basalt & Weathered Bronze Palette */
  --bg-abyss: #0d0f12;
  --bg-card: #15181e;
  --bg-card-subtle: #191d24;
  --border-stone: #252932;
  --border-focus: #3a404e;

  /* Typography Colors */
  --text-primary: #e2e4e8;
  --text-muted: #828896;
  --text-subtle: #575d6b;

  /* Antique Bronze Accents */
  --accent-bronze: #b89058;
  --accent-bronze-light: #cca66c;
  --accent-bronze-dim: rgba(184, 144, 88, 0.12);

  /* Fonts */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Source Code Pro", Menlo, Monaco, Consolas, monospace;
}

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

html {
  background-color: var(--bg-abyss);
  color-scheme: dark;
}

body {
  background-color: var(--bg-abyss);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.page-wrapper {
  max-width: 820px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* Header */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-stone);
  margin-bottom: 3.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-tag {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.status-indicator {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  border: 1px solid var(--border-stone);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  background: var(--bg-card);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--accent-bronze);
}

/* Hero Section */
.hero-section {
  margin-bottom: 4rem;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--accent-bronze);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.6;
}

/* Sections */
.content-section {
  margin-bottom: 3.5rem;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-stone);
}

/* Cards & Surfaces */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-stone);
  border-radius: 4px;
  padding: 1.5rem;
}

.card p {
  color: var(--text-primary);
  font-size: 0.95rem;
}

.card p:not(:last-child) {
  margin-bottom: 1rem;
}

.card strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Grid for Systems */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.system-card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-card);
  border: 1px solid var(--border-stone);
  border-radius: 4px;
  padding: 1.35rem;
}

.system-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--accent-bronze);
  margin-bottom: 0.6rem;
}

.system-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.system-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 0;
}

/* Philosophy List */
.principles-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.principles-list li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.principles-list strong {
  font-size: 0.92rem;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.principles-list span {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Verification */
.verify-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.verify-entry {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.verify-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.fingerprint-box {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background-color: var(--bg-abyss);
  border: 1px solid var(--border-stone);
  padding: 0.6rem 0.85rem;
  border-radius: 3px;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  word-break: break-all;
}

.verify-note {
  font-size: 0.82rem;
  color: var(--text-subtle);
  margin-top: 0.25rem;
}

/* Footer */
.site-footer {
  margin-top: 5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-stone);
  text-align: center;
}

.site-footer p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--text-subtle);
}

/* Mobile Adjustments */
@media (max-width: 640px) {
  .page-wrapper {
    padding: 2rem 1.2rem;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .grid-cards {
    grid-template-columns: 1fr;
  }
}