Pixel Perfect Replication

┌─────────────────────────────────────────────────────────────────────┐
│                                                                     │
│   IMAGE IN ──→ Phase 1: Intake ──→ Phase 2: Deep Extraction        │
│                  (classify)          (7 layers, fill sheets)        │
│                                                                     │
│                                 ──→ Phase 3: Build                  │
│                                      (structure-first, exact CSS)   │
│                                                                     │
│                                 ──→ Phase 4: Visual Diff            │
│                                      (verify against reference)     │
│                                                                     │
│   Each phase has a ✓ Quality Gate. Failing a gate blocks the next.  │
│                                                                     │
└─────────────────────────────────────────────────────────────────────┘

/* BLUEPRINT: Global tokens
   WHY: Setting these first means every component inherits 
   the correct base values. Changing a token here updates 
   the entire page. */

@import url('https://fonts.googleapis.com/css2?family=FONT_NAME:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors - from Extraction Sheet Layer 3 */
  --color-bg: #____;
  --color-surface: #____;
  --color-text: #____;
  --color-text-2: #____;
  --color-text-3: #____;
  --color-accent: #____;
  --color-accent-hover: #____;
  --color-border: rgba(_, _, _, _);

  /* Typography - from Extraction Sheet Layer 2 */
  --font-display: 'FONT_NAME', Georgia, serif;
  --font-body: 'FONT_NAME', system-ui, sans-serif;
  --font-mono: 'FONT_NAME', monospace;

  /* Spacing - from Extraction Sheet Layer 4 */
  --space-section: clamp(5rem, 10vw, 8rem);
  --space-component: 2rem;
  --space-element: 1rem;

  /* Radius - from Extraction Sheet Layer 5 */
  --radius-card: __px;
  --radius-button: __px;
  --radius-input: __px;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  font-size: 1rem; /* Adjust if reference base is not 16px */
  line-height: 1.6; /* From extraction */
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* BLUEPRINT: Section containers
   WHY: Getting the spatial structure right first prevents 
   cascading spacing errors when content is added. */

.section {
  width: 100%;
  max-width: ____px; /* From Layer 1 extraction */
  margin: 0 auto;
  padding: var(--space-section) clamp(1.5rem, 5vw, 5rem);
}

/* Full-viewport section */
.section--full {
  min-height: 100dvh;
  /* WHY dvh not vh: vh causes a layout jump on iOS Safari 
     when the address bar collapses. dvh accounts for this. */
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Grid layouts - adjust columns to match reference */
.grid-2-asymmetric {
  display: grid;
  grid-template-columns: 1.15fr 1fr; /* From Layer 1 */
  align-items: center;
  gap: 4rem;
}

.grid-3-equal {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem; /* From Layer 4 */
}

@media (max-width: 768px) {
  .grid-2-asymmetric,
  .grid-3-equal {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* BLUEPRINT: Typography scale
   WHY: Every property is explicitly set from the extraction.
   Never rely on browser defaults - they will drift. */

.heading-display {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem); /* From extraction */
  font-weight: 700;   /* Verified from stem thickness, not assumed */
  line-height: 0.95;  /* Tight - measured from baseline gap */
  letter-spacing: -0.03em; /* Negative - measured from character proximity */
  color: var(--color-text);
  text-wrap: balance;
  max-width: 18ch;    /* Prevents 4+ line wraps */
}

.heading-section {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.body-text {
  font-family: var(--font-body);
  font-size: clamp(0.9375rem, 1.1vw, 1.125rem);
  font-weight: 400;
  line-height: 1.65;
  color: var(--color-text-2);
  max-width: 55ch; /* Comfortable reading width */
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-3);
}

.caption {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-text-3);
}

/* BLUEPRINT: Button - primary
   WHY: Padding, radius, and font-size are from the extraction.
   The transition easing (0.16, 1, 0.3, 1) gives a snappy 
   deceleration that feels physical. */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;           /* From Layer 4 */
  font-family: var(--font-body);
  font-size: 0.875rem;               /* From Layer 2 */
  font-weight: 600;
  letter-spacing: 0.04em;            /* Only if extraction shows tracking */
  text-transform: uppercase;          /* Only if extraction shows uppercase */
  border-radius: var(--radius-button);
  background: var(--color-accent);
  color: #FFFFFF;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.btn-primary:active {
  transform: translateY(0) scale(0.98);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* BLUEPRINT: Button - ghost/outline */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-button);
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.btn-ghost:hover {
  border-color: var(--color-text);
  background: rgba(0, 0, 0, 0.03);
}

/* BLUEPRINT: Card */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: var(--space-component);
  border: 1px solid var(--color-border);
  /* Shadow: only add if extraction shows shadow */
}

/* BLUEPRINT: Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: 64px; /* From Layer 4 extraction */
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 5rem);
  background: rgba(255, 255, 255, 0.85); /* Adjust to match */
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-2);
  text-decoration: none;
  transition: color 0.2s ease;
}
.nav-link:hover {
  color: var(--color-text);
}

/* BLUEPRINT: Noise/grain overlay
   WHY: Breaks digital flatness. Only add if the reference 
   shows subtle texture on the background. 
   Uses position:fixed so the grain doesn't scroll. */
.grain-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.04; /* Adjust to match reference intensity */
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}

/* BLUEPRINT: Ambient radial glow
   WHY: Adds depth to flat dark backgrounds. Only use if the 
   reference shows a subtle light center. */
.ambient-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 60% 50% at 50% 40%,
    rgba(255, 255, 255, 0.035) 0%,
    transparent 70%
  );
  pointer-events: none;
}

/* BLUEPRINT: Frosted glass surface
   WHY: For navs or overlays that show content blurring through.
   saturate(180%) makes colors pop through the blur layer. */
.surface-frosted {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

/* BLUEPRINT: Mobile collapse
   WHY: Every multi-column layout must collapse to single-column.
   Touch targets must be minimum 44px for accessibility. */

@media (max-width: 768px) {
  .grid-2-asymmetric,
  .grid-3-equal {
    grid-template-columns: 1fr;
  }

  .heading-display {
    /* clamp() already handles this, but verify the minimum */
    max-width: 100%;
  }

  .nav {
    /* May need a hamburger menu implementation */
  }

  /* Touch targets */
  .btn-primary,
  .btn-ghost,
  .nav-link {
    min-height: 44px;
  }
}