:root {
  /* Colors */
  --color-primary: #0066cc;
  --color-primary-focus: #0071e3;
  --color-primary-on-dark: #2997ff;
  --color-ink: #1d1d1f;
  --color-body: #1d1d1f;
  --color-body-on-dark: #ffffff;
  --color-body-muted: #cccccc;
  --color-ink-muted-80: #333333;
  --color-ink-muted-48: #7a7a7a;
  --color-divider-soft: #f0f0f0;
  --color-hairline: #e0e0e0;
  --color-canvas: #ffffff;
  --color-canvas-parchment: #f5f5f7;
  --color-surface-pearl: #fafafc;
  --color-surface-tile-1: #272729;
  --color-surface-tile-2: #2a2a2c;
  --color-surface-tile-3: #252527;
  --color-surface-black: #000000;
  --color-surface-chip-translucent: rgba(210, 210, 215, 0.64);
  --color-on-primary: #ffffff;
  --color-on-dark: #ffffff;

  /* Typography Substitutes (Inter as primary substitute) */
  --font-display: "Inter", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;

  /* Spacing */
  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 17px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-section: 80px;

  /* Rounded */
  --rounded-none: 0px;
  --rounded-xs: 5px;
  --rounded-sm: 8px;
  --rounded-md: 11px;
  --rounded-lg: 18px;
  --rounded-pill: 9999px;
  --rounded-full: 9999px;

  /* Shadows */
  --shadow-product: 3px 5px 30px 0 rgba(0, 0, 0, 0.22);
}

/* Base resets */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-canvas);
  color: var(--color-body);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.022em; /* Tightened for Apple feel */
}

/* Typography Classes */
.hero-display {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 600;
  line-height: 1.07;
  letter-spacing: -0.28px;
}

.display-lg {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0;
}

.display-md {
  font-family: var(--font-body);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.47;
  letter-spacing: -0.374px;
}

.lead {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 400;
  line-height: 1.14;
  letter-spacing: 0.196px;
}

.tagline {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.19;
  letter-spacing: 0.231px;
}

.body {
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.022em;
}

.body-strong {
  font-weight: 600;
  letter-spacing: -0.374px;
}

.caption {
  font-size: 14px;
  line-height: 1.43;
  letter-spacing: -0.224px;
}

/* Components */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-radius: var(--rounded-pill);
  padding: 11px 22px;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 17px;
  transition: transform 0.2s ease, background-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.btn-primary:hover {
  background-color: var(--color-primary-focus);
}

.btn-primary:active {
  transform: scale(0.95);
}

.text-link {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 17px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 400;
}

.text-link:hover {
  text-decoration: underline;
}

/* Layout Elements */
.sub-nav {
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  height: 44px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 999;
  width: 100%;
}

.product-tile {
  padding: var(--spacing-section) 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.product-tile-light { background-color: var(--color-canvas); color: var(--color-ink); }
.product-tile-parchment { background-color: var(--color-canvas-parchment); color: var(--color-ink); }
.product-tile-dark { background-color: var(--color-surface-tile-1); color: var(--color-on-dark); }

.shadow-product {
  box-shadow: var(--shadow-product);
}

.search-input {
  background-color: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 14px;
  width: 100%;
  transition: all 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-canvas);
  box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.1);
}

.store-utility-card {
  background-color: var(--color-canvas);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--color-hairline);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.store-utility-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* Footer */
.footer {
  background-color: var(--color-canvas-parchment);
  padding: var(--spacing-section) 0;
  margin-top: var(--spacing-section);
}

.caption-strong {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 12px;
  display: block;
}

.dense-link {
  font-size: 12px;
  color: var(--color-ink-muted-48);
  text-decoration: none;
  transition: color 0.2s ease;
}

.dense-link:hover {
  color: var(--color-ink);
  text-decoration: underline;
}

.fine-print {
  font-size: 12px;
  color: var(--color-ink-muted-48);
  line-height: 1.33;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-canvas);
}

::-webkit-scrollbar-thumb {
  background: var(--color-hairline);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-ink-muted-48);
}

/* Animations */
@keyframes loading {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(300%); }
}

.animate-in {
  animation-duration: 0.5s;
  animation-fill-mode: forwards;
}

.fade-in {
  animation-name: fadeIn;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(90deg, #f5f5f7 25%, #ffffff 50%, #f5f5f7 75%);
  background-size: 200% 100%;
  animation: shimmer 2s infinite linear;
  color: transparent !important;
  border-radius: 8px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 768px) {
  .hero-display { font-size: 40px; }
  .display-lg { font-size: 32px; }
  .lead { font-size: 21px; }
  .global-nav { height: auto; padding: 10px var(--spacing-lg); }
  .sub-nav { height: auto; padding: 10px var(--spacing-lg); flex-direction: column; align-items: flex-start; }
}