body {
  position: relative;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  letter-spacing: var(--letter-spacing);
}

/*
  Zero-specificity fallback (via :where()) so this NEVER overrides a
  component's own `transition` declaration — a plain single-class rule like
  .card or .btn always wins. Without :where() here, `body *` (specificity
  0,1,1) would beat single-class selectors (0,1,0) and silently replace
  their entire `transition` shorthand, killing transform/opacity animations
  site-wide. Components that want smooth color-on-theme-toggle too should
  list background-color/border-color/color in their own transition instead.
*/
:where(body, body *:not([data-no-theme-transition] *)) {
  transition: background-color var(--duration-base) var(--ease-luxe),
              border-color var(--duration-base) var(--ease-luxe),
              color var(--duration-base) var(--ease-luxe),
              fill var(--duration-base) var(--ease-luxe),
              stroke var(--duration-base) var(--ease-luxe);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sage-700);
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  overflow: hidden;
  isolation: isolate;
  transition: transform 320ms cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 320ms cubic-bezier(0.16, 1, 0.3, 1),
              background-color var(--duration-fast) var(--ease-luxe),
              border-color var(--duration-fast) var(--ease-luxe);
}
/* diagonal sheen that sweeps across on hover */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(115deg, transparent 30%, color-mix(in oklab, white 35%, transparent) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 650ms cubic-bezier(0.16, 1, 0.3, 1);
}
.btn:hover::before {
  transform: translateX(120%);
}
.btn:active {
  transform: scale(0.97);
  transition-duration: 120ms;
}

.btn-primary {
  background: var(--sage-700);
  color: var(--sage-foreground);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--sage-800);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px) scale(1.015);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--foreground);
}
.btn-outline:hover {
  border-color: var(--sage-500);
  background: var(--sage-50);
  transform: translateY(-3px) scale(1.015);
  box-shadow: var(--shadow-md);
}

.card {
  background: var(--card);
  color: var(--card-foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-base) var(--ease-luxe),
              box-shadow var(--duration-base) var(--ease-luxe),
              background-color var(--duration-base) var(--ease-luxe),
              border-color var(--duration-base) var(--ease-luxe);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}