/* BuildBacklinks - Black, Blue & Yellow Theme */
:root {
  --black: #0a0a0a;
  --dark: #111827;
  --darker: #030712;
  --blue: #2563eb;
  --blue-light: #3b82f6;
  --blue-dark: #1d4ed8;
  --yellow: #facc15;
  --yellow-dark: #eab308;
  --yellow-light: #fde047;
  --white: #ffffff;
  --gray-100: #f3f4f6;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --success: #22c55e;
  --danger: #ef4444;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Segoe UI', system-ui, sans-serif;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(0,0,0,0.35);
  --shadow-yellow: 0 4px 20px rgba(250, 204, 21, 0.25);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  line-height: 1.75;
  color: var(--gray-300);
  background: var(--black);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 1rem;
  font-weight: 700;
}

h1 { font-size: 2.6rem; letter-spacing: -0.02em; }
h2 { font-size: 1.85rem; margin-top: 2.25rem; color: var(--yellow); }
h3 { font-size: 1.4rem; margin-top: 1.6rem; color: var(--blue-light); }
h4 { font-size: 1.15rem; }

p { margin-bottom: 1.2rem; }

a { color: var(--yellow); text-decoration: none; transition: color 0.2s, opacity 0.2s; }
a:hover { color: var(--yellow-light); text-decoration: underline; }

ul, ol { margin: 0 0 1.2rem 1.5rem; }
li { margin-bottom: 0.45rem; }

img { max-width: 100%; height: auto; border-radius: var(--radius); }

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  background: var(--darker);
  border-bottom: 2px solid var(--blue);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.logo {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.03em;
}
.logo:hover { text-decoration: none; color: var(--yellow); }
.logo span { color: var(--yellow); }

nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  gap: 0.15rem;
  flex-wrap: wrap;
}

nav a {
  display: block;
  padding: 0.45rem 0.75rem;
  color: var(--gray-300);
  font-weight: 500;
  font-size: 0.92rem;
  border-radius: 6px;
  text-decoration: none;
}
nav a:hover, nav a.active {
  background: var(--blue);
  color: var(--white);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 2px solid var(--yellow);
  color: var(--yellow);
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
}

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--darker) 0%, #0c1a3a 50%, var(--dark) 100%);
  border-bottom: 3px solid var(--yellow);
  color: var(--white);
  padding: 4.5rem 0 3.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  color: var(--white);
  font-size: 2.9rem;
  margin-bottom: 1.1rem;
  position: relative;
}
.hero h1 span { color: var(--yellow); }

.hero p {
  font-size: 1.2rem;
  max-width: 680px;
  margin: 0 auto 2rem;
  color: var(--gray-300);
  position: relative;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  font-weight: 700;
  border-radius: var(--radius);
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  text-align: center;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--yellow);
  color: var(--black);
}
.btn-primary:hover {
  background: var(--yellow-light);
  color: var(--black);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-yellow);
}

.btn-blue {
  background: var(--blue);
  color: var(--white);
}
.btn-blue:hover {
  background: var(--blue-light);
  color: var(--white);
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--yellow);
  border: 2px solid var(--yellow);
}
.btn-outline:hover {
  background: var(--yellow);
  color: var(--black);
  text-decoration: none;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  justify-content: center;
  margin: 1.4rem 0;
}

/* Main */
main {
  flex: 1;
  padding: 2.75rem 0;
}

.content-card {
  background: var(--dark);
  border: 1px solid #1f2937;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.1rem;
  margin-bottom: 2rem;
}

.lead {
  font-size: 1.18rem;
  color: var(--gray-400);
  margin-bottom: 1.5rem;
}

/* Grids & Cards */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.4rem;
  margin: 1.8rem 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
  margin: 1.8rem 0;
}

.card {
  background: var(--darker);
  border: 1px solid #1f2937;
  border-radius: var(--radius);
  padding: 1.4rem;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--blue);
  transform: translateY(-3px);
}
.card h3 { margin-top: 0; color: var(--yellow); font-size: 1.2rem; }

/* CTA boxes */
.cta-box {
  background: linear-gradient(135deg, #0c1a3a 0%, #111827 100%);
  border: 2px solid var(--blue);
  border-radius: var(--radius);
  padding: 1.9rem;
  text-align: center;
  margin: 2.2rem 0;
}
.cta-box h3 { color: var(--yellow); margin-top: 0; }

.affiliate-cta {
  background: linear-gradient(135deg, #1c1917 0%, #292524 100%);
  border: 2px solid var(--yellow);
  border-radius: var(--radius);
  padding: 1.7rem;
  text-align: center;
  margin: 1.9rem 0;
}
.affiliate-cta h3 { color: var(--yellow); margin-top: 0; }

/* Disclosure */
.disclosure {
  background: #1c0a0a;
  border-left: 4px solid var(--danger);
  padding: 1rem 1.2rem;
  margin: 1.4rem 0;
  font-size: 0.93rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--gray-300);
}
.disclosure strong { color: #fca5a5; }
.disclosure a { color: var(--yellow); }

/* Forms */
.form-box {
  background: var(--darker);
  border: 1px solid #1f2937;
  border-radius: var(--radius);
  padding: 1.8rem;
  max-width: 460px;
  margin: 1.8rem auto;
}
.form-box input[type="text"],
.form-box input[type="email"] {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 2px solid #374151;
  border-radius: 8px;
  font-size: 1rem;
  margin-bottom: 0.9rem;
  background: var(--black);
  color: var(--white);
  transition: border-color 0.2s;
}
.form-box input:focus {
  outline: none;
  border-color: var(--yellow);
}
.form-box button {
  width: 100%;
  padding: 0.85rem;
  background: var(--yellow);
  color: var(--black);
  border: none;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
}
.form-box button:hover { background: var(--yellow-light); }

/* Embeds */
.embed-container {
  position: relative;
  overflow: hidden;
  margin: 1.8rem 0;
  border-radius: var(--radius);
  border: 1px solid #1f2937;
  background: var(--darker);
}
.embed-container iframe {
  display: block;
  max-width: 100%;
  margin: 0 auto;
}

/* Footer */
.site-footer {
  background: var(--darker);
  border-top: 2px solid var(--blue);
  color: var(--gray-400);
  padding: 2.8rem 0 1.4rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1.8rem;
  margin-bottom: 1.8rem;
}
.footer-grid h4 {
  color: var(--yellow);
  margin-bottom: 0.9rem;
  font-size: 1.05rem;
}
.footer-grid ul { list-style: none; margin: 0; }
.footer-grid a { color: var(--gray-400); }
.footer-grid a:hover { color: var(--yellow); }

.footer-bottom {
  border-top: 1px solid #1f2937;
  padding-top: 1.3rem;
  text-align: center;
  font-size: 0.88rem;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4rem 0;
  background: var(--darker);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid #1f2937;
}
th, td {
  padding: 0.8rem 1rem;
  text-align: left;
  border-bottom: 1px solid #1f2937;
}
th {
  background: var(--blue);
  color: var(--white);
  font-weight: 600;
}
tr:hover { background: rgba(37,99,235,0.08); }

/* Breadcrumbs & TOC */
.breadcrumbs {
  font-size: 0.88rem;
  margin-bottom: 1.3rem;
  color: var(--gray-500);
}
.breadcrumbs a { color: var(--blue-light); }

.toc {
  background: var(--darker);
  border: 1px solid #1f2937;
  border-left: 4px solid var(--yellow);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  margin: 1.4rem 0;
}
.toc h4 { margin-top: 0; color: var(--yellow); }
.toc ul { margin-bottom: 0; }
.toc a { color: var(--gray-300); }
.toc a:hover { color: var(--yellow); }

/* Responsive */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  .hero h1 { font-size: 2.15rem; }
  .hero { padding: 3rem 0 2.5rem; }
  .nav-toggle { display: block; }
  nav { display: none; width: 100%; }
  nav.open { display: block; }
  nav ul { flex-direction: column; width: 100%; }
  nav a { padding: 0.7rem 1rem; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .embed-container iframe {
    width: 100% !important;
    height: 380px !important;
  }
}

.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.highlight { background: rgba(250,204,21,0.15); color: var(--yellow-light); padding: 0.1rem 0.35rem; border-radius: 3px; }