:root {
  --color-primary: #1F2937;
  --color-secondary: #374151;
  --color-accent: #64748B;
}

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { font-family: 'Source Sans 3', system-ui, sans-serif; }

::selection { background: rgba(100, 116, 139, 0.25); }

button, .btn, [class*="btn-"], a[href="#order_form"] {
  white-space: nowrap;
  min-width: fit-content;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

form button[type="submit"] {
  white-space: normal;
  width: 100%;
}

.site-header {
  background: linear-gradient(to bottom, rgba(17,24,39,0.55), rgba(17,24,39,0.08));
  border-bottom: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
  transition: background-color .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.site-header.is-scrolled {
  background: rgba(255,255,255,0.92);
  border-bottom: 1px solid rgba(229,231,235,0.9);
  box-shadow: 0 12px 30px rgba(17,24,39,0.10);
}

.site-header.is-scrolled .header-text { color: rgb(17,24,39); }
.site-header.is-scrolled .header-subtext { color: rgba(75,85,99,0.9); }
.site-header.is-scrolled .header-icon { color: rgb(17,24,39); }
.site-header.is-scrolled .nav-link { color: rgba(55,65,81,0.85); }
.site-header.is-scrolled .nav-link:hover { color: rgb(17,24,39); }

[data-animate] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  will-change: opacity, transform;
}
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.rotate-180 { transform: rotate(180deg); }

.focus-ring:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(100, 116, 139, 0.25);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-animate] { transition: none; }
  .site-header { transition: none; }
}