/* =============================================
   WhiteBackground.net — Global Styles
   Aesthetic: Ultra-refined minimalism
   ============================================= */

/* --- CSS Custom Properties --- */
:root {
  /* Whites & Near-Whites */
  --white-pure: #FFFFFF;
  --white-snow: #FFFAFA;
  --white-ghost: #F8F8FF;
  --white-floral: #FFFAF0;
  --white-ivory: #FFFFF0;
  --white-linen: #FAF0E6;
  --white-seashell: #FFF5EE;
  --white-honeydew: #F0FFF0;
  --white-mintcream: #F5FFFA;
  --white-azure: #F0FFFF;
  --white-aliceblue: #F0F8FF;
  --white-lavenderblush: #FFF0F5;
  --white-oldlace: #FDF5E6;
  --white-antiquewhite: #FAEBD7;
  --white-beige: #F5F5DC;
  --white-cornsilk: #FFF8DC;
  --white-whitesmoke: #F5F5F5;

  /* Neutrals */
  --gray-50: #FAFAFA;
  --gray-100: #F4F4F5;
  --gray-200: #E4E4E7;
  --gray-300: #D4D4D8;
  --gray-400: #A1A1AA;
  --gray-500: #71717A;
  --gray-600: #52525B;
  --gray-700: #3F3F46;
  --gray-800: #27272A;
  --gray-900: #18181B;
  --gray-950: #09090B;

  /* Accents */
  --accent: #1A1A1A;
  --accent-subtle: #E8E8E8;
  --accent-warm: #F7F3EE;
  --accent-blue: #3B82F6;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 780px;
  --max-width-wide: 1400px;
  --nav-height: 64px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1);
  --shadow-soft: 0 2px 8px rgba(0,0,0,0.03), 0 8px 32px rgba(0,0,0,0.05);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 6px 24px rgba(0,0,0,0.06);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--gray-800);
  background-color: var(--white-pure);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--gray-950);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.4rem); }

p {
  font-size: 1.05rem;
  color: var(--gray-600);
  max-width: 65ch;
}

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.25rem; }
.text-xl { font-size: 1.5rem; }

.font-mono { font-family: var(--font-mono); }
.font-display { font-family: var(--font-display); }

.text-center { text-align: center; }
.text-muted { color: var(--gray-400); }

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--wide {
  max-width: var(--max-width-wide);
}

.section {
  padding: var(--space-5xl) 0;
}

.section--sm {
  padding: var(--space-3xl) 0;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

/* --- Grid System --- */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  z-index: 1000;
  transition: background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(255, 255, 255, 0.95);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-950);
  letter-spacing: -0.03em;
}

.nav__logo-mark {
  width: 28px;
  height: 28px;
  border: 2px solid var(--gray-900);
  border-radius: 6px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav__logo-mark::after {
  content: '';
  width: 12px;
  height: 12px;
  background: var(--gray-900);
  border-radius: 2px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-500);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--gray-900);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover,
.nav__link.active {
  color: var(--gray-900);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__cta {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 20px;
  background: var(--gray-950);
  color: var(--white-pure);
  border-radius: 100px;
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.nav__cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Mobile Nav Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-900);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast);
}

.nav__toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav__toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav__toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    padding: var(--space-xl);
    gap: var(--space-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--duration-slow) var(--ease-out),
                opacity var(--duration-normal) var(--ease-out);
    border-bottom: 1px solid var(--gray-100);
  }

  .nav__links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav__link {
    font-size: 1.1rem;
    padding: var(--space-sm) 0;
  }
}

/* --- Body offset for fixed nav --- */
main {
  padding-top: var(--nav-height);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(248,248,255,0.8) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(240,255,255,0.6) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(255,250,250,0.7) 0%, transparent 50%);
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-400);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.8s var(--ease-out) both;
}

.hero__badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--gray-300);
  border-radius: 50%;
}

.hero__title {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s var(--ease-out) 0.1s both;
}

.hero__title em {
  font-style: italic;
  background: linear-gradient(135deg, var(--gray-950), var(--gray-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--gray-400);
  max-width: 540px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.6;
  animation: fadeInUp 0.8s var(--ease-out) 0.2s both;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s var(--ease-out) 0.3s both;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 100px;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--gray-950);
  color: var(--white-pure);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.btn--secondary {
  background: var(--white-pure);
  color: var(--gray-700);
  border: 1.5px solid var(--gray-200);
}

.btn--secondary:hover {
  border-color: var(--gray-400);
  transform: translateY(-1px);
}

.btn--ghost {
  color: var(--gray-600);
  padding: 14px 16px;
}

.btn--ghost:hover {
  color: var(--gray-900);
}

.btn--sm {
  font-size: 0.85rem;
  padding: 10px 20px;
}

.btn__icon {
  width: 18px;
  height: 18px;
}

/* --- Cards --- */
.card {
  background: var(--white-pure);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--gray-200);
}

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-lg);
  color: var(--gray-700);
}

.card__title {
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
}

.card__desc {
  font-size: 0.95rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-lg);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-700);
  transition: gap var(--duration-fast) var(--ease-out);
}

.card__link:hover {
  gap: 10px;
  color: var(--gray-950);
}

.card__link svg {
  width: 16px;
  height: 16px;
}

/* --- Section Headers --- */
.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.section-header__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--gray-400);
  margin-bottom: var(--space-md);
}

.section-header__title {
  margin-bottom: var(--space-md);
}

.section-header__desc {
  font-size: 1.1rem;
  color: var(--gray-400);
  margin: 0 auto;
}

/* --- Code Blocks --- */
.code-block {
  position: relative;
  background: var(--gray-950);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-lg);
  background: rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.code-block__lang {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.code-block__copy {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-400);
  padding: 4px 12px;
  border-radius: 4px;
  transition: all var(--duration-fast);
  border: 1px solid transparent;
}

.code-block__copy:hover {
  color: var(--white-pure);
  border-color: rgba(255,255,255,0.15);
}

.code-block__copy.copied {
  color: #4ade80;
}

.code-block pre {
  padding: var(--space-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: #e2e8f0;
}

/* Syntax highlighting */
.code-block .comment { color: #64748b; }
.code-block .keyword { color: #c084fc; }
.code-block .string { color: #86efac; }
.code-block .property { color: #93c5fd; }
.code-block .value { color: #fbbf24; }
.code-block .selector { color: #f472b6; }
.code-block .number { color: #fb923c; }
.code-block .function { color: #67e8f9; }

/* --- Color Swatch Grid --- */
.swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-md);
}

.swatch {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--gray-100);
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.swatch:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.swatch__color {
  height: 100px;
  position: relative;
}

.swatch__copied {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.6);
  color: var(--white-pure);
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity var(--duration-fast);
}

.swatch.copied .swatch__copied {
  opacity: 1;
}

.swatch__info {
  padding: var(--space-sm) var(--space-md);
}

.swatch__name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-800);
}

.swatch__hex {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-400);
}

/* --- Tools Section --- */
.tool-box {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
}

.tool-box__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

/* Contrast Checker */
.contrast-checker {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  flex-wrap: wrap;
}

.contrast-checker__input-group {
  flex: 1;
  min-width: 200px;
}

.contrast-checker__label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-500);
  margin-bottom: var(--space-sm);
}

.contrast-checker__field {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--white-pure);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
}

.contrast-checker__field input[type="text"] {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--gray-800);
  background: transparent;
}

.contrast-checker__field input[type="color"] {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
}

.contrast-result {
  flex: 1;
  min-width: 200px;
}

.contrast-result__preview {
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  margin-bottom: var(--space-md);
  border: 1px solid var(--gray-200);
}

.contrast-result__ratio {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
}

.contrast-result__badges {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.contrast-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contrast-badge--pass {
  background: #dcfce7;
  color: #166534;
}

.contrast-badge--fail {
  background: #fee2e2;
  color: #991b1b;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--gray-100);
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-2xl);
}

@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-sm);
}

.footer__brand-desc {
  font-size: 0.9rem;
  color: var(--gray-400);
  line-height: 1.6;
  max-width: 300px;
}

.footer__heading {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-400);
  margin-bottom: var(--space-md);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: 0.9rem;
  color: var(--gray-500);
  transition: color var(--duration-fast);
}

.footer__link:hover {
  color: var(--gray-900);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-2xl);
  margin-top: var(--space-2xl);
  border-top: 1px solid var(--gray-100);
  font-size: 0.8rem;
  color: var(--gray-400);
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Article / Content Pages --- */
.article {
  padding: var(--space-4xl) 0 var(--space-5xl);
}

.article__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.article__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--gray-400);
  margin-bottom: var(--space-md);
}

.article__title {
  margin-bottom: var(--space-lg);
  line-height: 1.15;
}

.article__meta {
  font-size: 0.9rem;
  color: var(--gray-400);
}

.article__body {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.article__body h2 {
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
  font-size: 1.8rem;
}

.article__body h3 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.article__body p {
  margin-bottom: var(--space-lg);
  max-width: 100%;
}

.article__body blockquote {
  border-left: 3px solid var(--gray-200);
  padding-left: var(--space-lg);
  margin: var(--space-2xl) 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--gray-600);
  line-height: 1.6;
}

.article__body ul,
.article__body ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.article__body li {
  margin-bottom: var(--space-sm);
  color: var(--gray-600);
  line-height: 1.7;
}

.article__body ul li { list-style-type: disc; }
.article__body ol li { list-style-type: decimal; }

.article__body .code-block {
  margin: var(--space-2xl) 0;
}

.article__body img {
  border-radius: var(--radius-md);
  margin: var(--space-2xl) 0;
}

/* Callout box */
.callout {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin: var(--space-2xl) 0;
}

.callout--tip {
  border-left: 3px solid #3b82f6;
}

.callout--warning {
  border-left: 3px solid #f59e0b;
}

.callout__title {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-600);
  margin-bottom: var(--space-sm);
}

.callout p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* --- Stat Row --- */
.stats {
  display: flex;
  justify-content: center;
  gap: var(--space-4xl);
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat__number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--gray-950);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat__label {
  font-size: 0.85rem;
  color: var(--gray-400);
  margin-top: var(--space-xs);
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--gray-400);
  padding: var(--space-lg) 0;
}

.breadcrumbs a {
  color: var(--gray-400);
  transition: color var(--duration-fast);
}

.breadcrumbs a:hover {
  color: var(--gray-700);
}

.breadcrumbs__sep {
  font-size: 0.7rem;
}

/* --- Table --- */
.table-wrap {
  overflow-x: auto;
  margin: var(--space-2xl) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-100);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.table th {
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-500);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--gray-100);
  background: var(--gray-50);
}

.table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--gray-50);
  color: var(--gray-700);
}

.table tr:last-child td {
  border-bottom: none;
}

.table code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--gray-50);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--gray-700);
}

/* --- Skip to content (a11y) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--gray-950);
  color: var(--white-pure);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  z-index: 9999;
  transition: top var(--duration-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* --- Print Styles --- */
@media print {
  .nav, .footer, .hero__actions {
    display: none;
  }

  body {
    font-size: 12pt;
    color: #000;
  }

  a {
    text-decoration: underline;
  }
}