/* KHB — base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.khb-site {
  margin: 0;
  min-height: 100vh;
  background: var(--khb-bg);
  color: var(--khb-text);
  font-family: var(--khb-font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
.khb-site h1, .khb-site h2, .khb-site h3, .khb-site h4 {
  font-family: var(--khb-font-serif);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--khb-text-strong);
  line-height: 1.18;
  margin: 0 0 0.75rem;
}
.khb-container,
.container {
  width: min(var(--khb-container), calc(100% - 2.5rem));
  margin-inline: auto;
}
.khb-section { padding-block: var(--khb-section-y); }
.khb-kicker {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--khb-gold);
  font-weight: 600;
  margin: 0 0 0.5rem;
}
.khb-lead { color: var(--khb-text-muted); max-width: 58ch; margin: 0; font-size: 1.05rem; }
.khb-bg-shell {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 42% at 8% -6%, var(--khb-steel-soft), transparent 56%),
    radial-gradient(ellipse 40% 32% at 98% 2%, var(--khb-gold-muted), transparent 54%),
    linear-gradient(175deg, var(--khb-brand-deep) 0%, var(--khb-bg-elevated) 48%, var(--khb-bg) 100%);
}

html[data-theme="executive-light"] .khb-bg-shell,
html[data-theme="executive-light"] .background-shell {
  background:
    radial-gradient(ellipse 75% 48% at 10% -8%, rgba(20, 43, 77, 0.05), transparent 58%),
    radial-gradient(ellipse 42% 30% at 94% 0%, rgba(182, 140, 74, 0.06), transparent 52%),
    linear-gradient(180deg, var(--khb-cream) 0%, var(--khb-bg) 42%, var(--khb-cream-soft) 100%);
}

.khb-bg-grid {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(168, 180, 196, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 180, 196, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
}

html[data-theme="executive-light"] .khb-bg-grid,
html[data-theme="executive-light"] .bg-grid {
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(20, 43, 77, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 43, 77, 0.045) 1px, transparent 1px);
}

.khb-bg-horizon {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 22%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--khb-gold) 44%, rgba(122, 148, 184, 0.5) 66%, transparent);
  opacity: 0.42;
}

html[data-theme="executive-light"] .khb-bg-horizon,
html[data-theme="executive-light"] .bg-horizon {
  opacity: 0.55;
  background: linear-gradient(90deg, transparent, rgba(182, 140, 74, 0.32) 46%, rgba(20, 43, 77, 0.18) 70%, transparent);
}

.hidden { display: none !important; }