:root {
  --bg-obsidian: #0B0F17;
  --bg-card: #131B2E;
  --bg-card-hover: #19243D;
  --terminal-green: #00F5A0;
  --electric-cyan: #00D9F5;
  --amber-alert: #FFB800;
  --text-primary: #F8FAFC;
  --text-muted: #94A3B8;
  --border-subtle: rgba(148, 163, 184, 0.16);
  --border-neon: rgba(0, 245, 160, 0.55);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-obsidian);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 3rem 1.25rem 4rem;
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
  z-index: 0;
}

.hub-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Header */
.brand-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
}

.avatar-badge {
  width: 68px;
  height: 68px;
  border-radius: 16px;
  background: var(--bg-card);
  border: 1.5px solid var(--border-neon);
  box-shadow: 0 0 28px rgba(0, 245, 160, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--terminal-green);
}

.stack-bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.stack-bars span {
  display: block;
  width: 14px;
  height: 3px;
  border-radius: 2px;
  background: var(--terminal-green);
}

.stack-bars span:nth-child(2) {
  background: var(--electric-cyan);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  background: rgba(0, 245, 160, 0.08);
  border: 1px solid rgba(0, 245, 160, 0.28);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--terminal-green);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--terminal-green);
  box-shadow: 0 0 8px var(--terminal-green);
}

.brand-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-title .accent {
  color: var(--terminal-green);
}

.brand-subtitle {
  color: var(--text-muted);
  font-size: 0.98rem;
  max-width: 540px;
}

/* Featured Blueprint Callout */
.blueprint-callout {
  background: linear-gradient(145deg, rgba(19, 27, 46, 0.96), rgba(11, 15, 23, 0.98));
  border: 1.5px solid var(--border-neon);
  border-radius: 16px;
  padding: 1.4rem 1.5rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.blueprint-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-badge {
  background: var(--terminal-green);
  color: var(--bg-obsidian);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
}

.mono-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--electric-cyan);
}

.blueprint-callout h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.blueprint-callout p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.blueprint-download-btn {
  margin-top: 0.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  background: var(--terminal-green);
  color: var(--bg-obsidian);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.8rem 1.15rem;
  border-radius: 10px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.blueprint-download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 245, 160, 0.35);
}

/* Stack Cards (Linktree-style buttons) */
.links-section {
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}

.section-heading {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.stack-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.15rem 1.35rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: transform 0.16s ease, border-color 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
}

.stack-card:hover {
  transform: translateY(-2px);
  background: var(--bg-card-hover);
  border-color: var(--terminal-green);
  box-shadow: 0 8px 26px rgba(0, 245, 160, 0.12);
}

.card-left {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.tool-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--terminal-green);
  letter-spacing: 0.04em;
}

.tool-title {
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tool-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.card-cta {
  flex-shrink: 0;
}

.cta-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--terminal-green);
  border: 1px solid rgba(0, 245, 160, 0.4);
  background: rgba(0, 245, 160, 0.07);
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  white-space: nowrap;
}

.stack-card:hover .cta-pill {
  background: var(--terminal-green);
  color: var(--bg-obsidian);
}

/* Footer */
.hub-footer {
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.mono-footnote {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.disclosure {
  font-size: 0.75rem;
  color: rgba(148, 163, 184, 0.7);
}

@media (max-width: 560px) {
  .stack-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .card-cta {
    width: 100%;
  }
  .cta-pill {
    width: 100%;
    text-align: center;
  }
}