*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { scrollbar-color: var(--color-muted) var(--color-paper); scroll-padding-top: var(--space-3xl); }
body {
  margin: 0;
  background-color: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  caret-color: var(--color-accent);
}
::selection { background: color-mix(in oklab, var(--color-accent) 22%, transparent); color: var(--color-ink); }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.16em; }
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: var(--display-weight, 700);
  font-synthesis: none;
  letter-spacing: var(--tracking-display);
  line-height: 1.04;
  overflow-wrap: break-word;
  min-width: 0;
  text-wrap: balance;
}
h1 { max-width: 24ch; font-size: var(--text-display); }
h2 { max-width: 32ch; font-size: var(--text-section); }
h3 { max-width: 42ch; font-size: var(--text-title); line-height: 1.2; }
.lead { font-size: var(--text-lead); line-height: 1.55; max-width: 58ch; color: var(--color-ink-2); }
p { margin: 0; text-wrap: pretty; }
p:not([class]) { max-width: 65ch; }
img, video { max-width: 100%; height: auto; display: block; }
svg { display: block; }
[hidden] { display: none !important; }
button, input, select, textarea { font: inherit; }
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); box-sizing: border-box; }
.num, .figure, td.num, .mono, .label-mono { font-family: var(--font-outlier); font-variant-numeric: tabular-nums; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* Viewport Scroll Progress Bar (ScaleX transform - no width transition) */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  z-index: 1000;
  pointer-events: none;
  transform-origin: left;
  transform: scaleX(0);
}

/* Subtle Technical Blueprint Grid */
.tech-grid-canvas {
  background-image: 
    linear-gradient(to right, var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center top;
}

.tech-grid-dark {
  background-image: 
    linear-gradient(to right, var(--color-grid-line-dark) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-grid-line-dark) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center top;
}

/* Technical Coordinate Mark (Untracked) */
.tech-coord {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

/* Viewport Scroll Reveal Utility (Visible by default; scoped under .js) */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-reveal) var(--ease-out), transform var(--dur-reveal) var(--ease-out);
  will-change: opacity, transform;
}

html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for grouped reveals */
html.js [data-reveal-delay="1"] { transition-delay: 80ms; }
html.js [data-reveal-delay="2"] { transition-delay: 160ms; }
html.js [data-reveal-delay="3"] { transition-delay: 240ms; }
html.js [data-reveal-delay="4"] { transition-delay: 320ms; }

/* Dose Molded Tactile Controls */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  height: 52px;
  padding: 0 var(--space-lg);
  border: 0;
  border-radius: var(--radius-input);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--text-md);
  text-decoration: none;
  cursor: pointer;
  box-shadow: inset 0 1px 0 var(--glint), 0 0 0 1px var(--color-rule), 0 3px 0 var(--color-rule);
  transition: transform var(--dur-micro) var(--ease-out), box-shadow var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out);
}
.btn:active {
  transform: translateY(3px);
  box-shadow: inset 0 1px 0 var(--glint), 0 0 0 1px var(--color-rule), 0 0 0 var(--color-rule);
}
.btn--primary,
.btn-primary {
  background: linear-gradient(var(--color-accent), var(--color-accent-deep));
  color: var(--color-accent-ink);
  box-shadow: 0 0 0 1px var(--color-accent-deep), 0 3px 0 var(--color-accent-deep);
}
.btn--primary:hover,
.btn-primary:hover,
.btn--primary:focus-visible,
.btn-primary:focus-visible {
  background: linear-gradient(var(--color-accent-hover), var(--color-accent-deep));
  color: var(--color-accent-ink);
}
.btn--primary:active,
.btn-primary:active {
  transform: translateY(3px);
  box-shadow: 0 0 0 1px var(--color-accent-deep), 0 0 0 var(--color-accent-deep);
}
.btn--secondary,
.btn-secondary {
  background: var(--color-paper-2);
  color: var(--color-ink);
  box-shadow: inset 0 1px 0 var(--glint), 0 0 0 1px var(--color-rule), 0 3px 0 var(--color-rule);
}
.btn--secondary:hover,
.btn-secondary:hover,
.btn--secondary:focus-visible,
.btn-secondary:focus-visible {
  background: var(--color-paper);
}
.btn--secondary:active,
.btn-secondary:active {
  transform: translateY(3px);
  box-shadow: inset 0 1px 0 var(--glint), 0 0 0 1px var(--color-rule), 0 0 0 var(--color-rule);
}

/* Dose Plastic Panels & Trays */
.plastic-tray {
  background: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.plastic-tint-mint {
  background: var(--p-thu);
  border: 1px solid var(--color-mint-border);
}
.plastic-tint-yellow {
  background: var(--p-tue);
  border: 1px solid var(--color-yellow-border);
}
.plastic-tint-lavender {
  background: var(--p-fri);
  border: 1px solid var(--color-lavender-border);
}

@media (max-width: 60rem) { :root { --gutter: 24px; --section-gap-s: 56px; --section-gap: 72px; --section-gap-l: 96px; } }
@media (max-width: 40rem) { :root { --gutter: 16px; --section-gap-s: 48px; --section-gap: 56px; --section-gap-l: 72px; --gap-columns: 16px; } }
@media (prefers-reduced-motion: reduce) {
  *:not(.keep-motion), *:not(.keep-motion)::before, *:not(.keep-motion)::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  html.js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}