/* Home Pros – Buyers (Buyer Network)
   Design: White background, navy, blue accent, institutional */

:root {
  --by-navy: #0B1F3B;
  --by-accent: #1F6FEB;
  --by-gray-50: #f9fafb;
  --by-gray-100: #f3f4f6;
  --by-gray-200: #e5e7eb;
  --by-gray-500: #6b7280;
  --by-gray-600: #4b5563;
  --by-gray-800: #1f2937;
  --by-white: #ffffff;
  --by-max: 72rem;
  --by-font: 'DM Sans', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--by-font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--by-gray-800);
  background-color: var(--by-white);
  -webkit-font-smoothing: antialiased;
}

.by-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid var(--by-gray-100);
}

.by-nav {
  max-width: var(--by-max);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.by-logo { color: var(--by-navy); font-weight: 600; font-size: 1.125rem; text-decoration: none; }
.by-nav-link { color: var(--by-navy); font-size: 0.875rem; font-weight: 500; text-decoration: none; margin-left: 1.5rem; }
.by-nav-link:hover { color: var(--by-accent); }

.by-main { display: block; }

.by-section { padding: 4rem 1.5rem; }
.by-section--alt { background-color: var(--by-gray-50); }

.by-container { max-width: var(--by-max); margin-left: auto; margin-right: auto; }

.by-hero {
  padding-top: 7rem;
  padding-bottom: 4rem;
  text-align: center;
}

.by-hero h1 {
  margin: 0 0 1rem;
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--by-navy);
  line-height: 1.2;
}

@media (min-width: 640px) {
  .by-hero h1 { font-size: 2.25rem; }
}

.by-hero-sub {
  margin: 0 auto 2rem;
  font-size: 1.125rem;
  color: var(--by-gray-600);
  max-width: 36rem;
}

.by-btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--by-white);
  background-color: var(--by-navy);
  border: none;
  border-radius: 0.5rem;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s;
}

.by-btn:hover { background-color: #0a2847; }

.by-btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--by-white), 0 0 0 4px var(--by-navy);
}

.by-h2 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--by-navy);
}

.by-h2--center { text-align: center; }

/* Who we work with */
.by-audience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1.5rem;
}

@media (min-width: 640px) {
  .by-audience-grid { grid-template-columns: repeat(3, 1fr); }
}

.by-audience-item {
  padding: 1rem;
  background: var(--by-white);
  border: 1px solid var(--by-gray-200);
  border-radius: 0.5rem;
  font-weight: 500;
  color: var(--by-navy);
  text-align: center;
}

/* Requirements */
.by-req-list { list-style: none; margin: 0; padding: 0; }
.by-req-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--by-gray-200);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.by-req-list li:last-child { border-bottom: none; }

.by-req-list li::before {
  content: "";
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  background: var(--by-navy);
  border-radius: 50%;
  margin-top: 0.2rem;
}

.by-req-list strong { color: var(--by-navy); }

/* Process */
.by-process-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .by-process-grid { grid-template-columns: repeat(4, 1fr); }
}

.by-process-step {
  text-align: center;
  padding: 1.5rem 1rem;
}

.by-process-num {
  display: inline-block;
  width: 2.5rem;
  height: 2.5rem;
  line-height: 2.5rem;
  border-radius: 50%;
  background: var(--by-navy);
  color: var(--by-white);
  font-weight: 700;
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.by-process-title { font-weight: 600; color: var(--by-navy); margin: 0 0 0.5rem; }
.by-process-desc { margin: 0; font-size: 0.875rem; color: var(--by-gray-600); }

/* Apply CTA */
.by-apply {
  text-align: center;
  padding: 3rem 1.5rem;
}

.by-apply h2 { margin-bottom: 1rem; }
.by-apply p { margin: 0 0 1.5rem; color: var(--by-gray-600); max-width: 32rem; margin-left: auto; margin-right: auto; }

.by-footer {
  border-top: 1px solid var(--by-gray-200);
  padding: 2rem 1.5rem;
  text-align: center;
}

.by-footer a { color: var(--by-navy); text-decoration: none; margin: 0 0.5rem; }
.by-footer a:hover { color: var(--by-accent); }