/* BuildersWorlds - Core Cyber-Engineering Stylesheet */
:root {
  --bg-dark: #080c14;
  --bg-card: #0f172a;
  --bg-card-alt: #162032;
  --bg-card-hover: #1e293b;
  --border-color: #243247;
  --border-bright: #38bdf8;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  --accent-blue: #3b82f6;
  --accent-orange: #f97316;
  --accent-amber: #f59e0b;
  --accent-green: #10b981;
  --accent-red: #ef4444;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius: 10px;
  --transition: all 0.2s ease-in-out;
}

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

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(ellipse at 50% 0%, rgba(6, 182, 212, 0.08) 0%, transparent 60%),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #38bdf8;
  text-decoration: underline;
}

/* Header & Nav */
.header {
  border-bottom: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.brand-logo {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 900;
  box-shadow: 0 0 16px var(--accent-cyan-glow);
}

.brand-badge {
  font-size: 0.7rem;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.925rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
  background: var(--bg-card-hover);
  text-decoration: none;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
}

/* Layout */
.main-content {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 2.5rem 1rem 3rem;
  max-width: 900px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-cyan-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
  color: #fff;
  text-decoration: none;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-muted);
  text-decoration: none;
}

/* Cards & Grid */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
}

/* Forms & Workbench Controls */
.workbench-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.workbench-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px var(--accent-cyan-glow);
}

/* Range Sliders */
.slider-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

input[type="range"] {
  flex: 1;
  accent-color: var(--accent-cyan);
  cursor: pointer;
}

.slider-val-badge {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  color: var(--accent-cyan);
  min-width: 60px;
  text-align: center;
}

/* Status Badges */
.status-foundation { background: rgba(37, 99, 235, 0.2); color: #60a5fa; border: 1px solid #2563eb; }
.status-optimal { background: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid #10b981; }
.status-stable { background: rgba(234, 179, 8, 0.2); color: #fde047; border: 1px solid #eab308; }
.status-warning { background: rgba(249, 115, 22, 0.2); color: #fb923c; border: 1px solid #f97316; }
.status-critical { background: rgba(239, 68, 68, 0.2); color: #f87171; border: 1px solid #ef4444; }
.status-collapse { background: rgba(153, 27, 27, 0.3); color: #fca5a5; border: 1px solid #991b1b; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Flowchart & DAG Nodes */
.dag-container {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-cyan);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.node-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.node-meta {
  display: flex;
  gap: 1.5rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.node-meta span strong {
  color: #fff;
  font-family: var(--font-mono);
}

/* Tables */
.table-responsive {
  overflow-x: auto;
  margin-top: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th, td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--bg-card-alt);
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Affiliate Promo Card */
.affiliate-box {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.08) 0%, rgba(59, 130, 246, 0.05) 100%);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin: 2.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.affiliate-badge {
  background: var(--accent-cyan);
  color: #000;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
  padding: 3rem 1.5rem 2rem;
  margin-top: auto;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2rem;
}

.footer-col h4 {
  font-size: 0.95rem;
  color: #fff;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.6rem;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  max-width: 1280px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 1rem;
}

/* Mobile Responsive */
@media (max-width: 868px) {
  .grid-cols-2, .grid-cols-3, .grid-cols-4 {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
  }
  .footer-container {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 2rem;
  }
}