/* ============================================================
   eMonitor Design System — Shared Styles
   Semantic, accessible, performance-optimized
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Brand Colors */
  --color-primary: #5470CB;
  --color-primary-dark: #3859C2;
  --color-primary-light: #E4EBF8;
  --color-primary-surface: #F6FAFF;

  /* Neutral Colors */
  --color-text: #33475B;
  --color-text-light: #536171;
  --color-text-muted: #7E8EA0;
  --color-heading: #1F2D3D;
  --color-white: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-border: #E1E8F0;

  /* Accent Colors */
  --color-success: #2ECC71;
  --color-warning: #F39C12;
  --color-danger: #E74C3C;
  --color-info: #3498DB;
  --color-purple: #7B61FF;
  --color-purple-light: #F6F4FF;

  /* Typography */
  --font-family: "source-sans-pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --line-height-base: 1.7;
  --line-height-heading: 1.25;

  /* 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;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --container-wide: 1400px;
  --header-height: 72px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Skip Link (Accessibility) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  z-index: 100000;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-md);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family);
  color: var(--color-heading);
  line-height: var(--line-height-heading);
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: var(--space-lg); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); margin-bottom: var(--space-md); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); margin-bottom: var(--space-md); }
h4 { font-size: clamp(1.1rem, 2vw, 1.375rem); margin-bottom: var(--space-sm); }
h5 { font-size: 1.125rem; margin-bottom: var(--space-sm); }
h6 { font-size: 1rem; margin-bottom: var(--space-sm); }

p { margin-bottom: var(--space-md); max-width: 75ch; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-dark); }
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

ul, ol {
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
}
li { margin-bottom: var(--space-xs); }

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

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

/* --- Section Spacing --- */
.section {
  padding: var(--space-4xl) 0;
}
.section--sm { padding: var(--space-2xl) 0; }
.section--lg { padding: calc(var(--space-4xl) * 1.5) 0; }
.section--surface { background-color: var(--color-primary-surface); }
.section--dark {
  background-color: var(--color-heading);
  color: var(--color-white);
}
.section--dark h1, .section--dark h2, .section--dark h3,
.section--dark h4, .section--dark h5, .section--dark h6 {
  color: var(--color-white);
}

/* --- Site Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  height: var(--header-height);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.site-header__logo img {
  height: 40px;
  width: auto;
}

/* Primary Navigation */
.primary-nav { display: flex; align-items: center; gap: var(--space-xl); }
.primary-nav__list {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
  padding: 0;
  margin: 0;
}
.primary-nav__link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  padding: var(--space-sm) 0;
  position: relative;
}
.primary-nav__link:hover,
.primary-nav__link[aria-current="page"] {
  color: var(--color-primary);
}
.primary-nav__link[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0; right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}
.primary-nav__actions { display: flex; gap: var(--space-md); align-items: center; }

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-sm);
  cursor: pointer;
}
.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: var(--transition-base);
}
.nav-toggle--active .nav-toggle__bar:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle--active .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle--active .nav-toggle__bar:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  padding: 0.625rem 1.75rem;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
}

.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--secondary:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: transparent;
}
.btn--ghost:hover { color: var(--color-primary); }

.btn--lg { padding: 0.875rem 2.25rem; font-size: var(--font-size-lg); }
.btn--sm { padding: 0.375rem 1.25rem; font-size: var(--font-size-sm); }
.btn--block { display: flex; width: 100%; justify-content: center; }
.btn--on-dark {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.65);
}
.btn--on-dark:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--color-white);
  color: var(--color-white);
}

/* --- Layout Utilities --- */
.section-intro {
  max-width: 700px;
  margin: 0 auto var(--space-2xl);
  text-align: center;
}
.btn-row {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.btn-row--center { justify-content: center; }

/* --- Platform Badges --- */
.platform-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  max-width: 850px;
  margin: 0 auto;
}
.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.65rem 1.4rem;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1.05rem;
  transition: var(--transition-fast);
  text-decoration: none;
}
.platform-badge:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.platform-badge__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.platform-badge__icon svg { width: 100%; height: 100%; fill: currentColor; }
.platform-badge__label { display: inline-flex; flex-direction: column; line-height: 1.1; }
.platform-badge__beta {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.85;
  font-weight: 700;
}

/* --- Hero Section --- */
.hero {
  padding: var(--space-4xl) 0;
  position: relative;
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}
.hero__eyebrow {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
}
.hero__title { max-width: 600px; }
.hero__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 540px;
  margin-bottom: var(--space-xl);
}
.hero__actions { display: flex; gap: var(--space-md); flex-wrap: wrap; align-items: center; }
.hero__micro-copy {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}
.hero__image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* --- Social Proof Bar --- */
.social-proof {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
  padding: var(--space-xl) 0;
}
.social-proof__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.social-proof__logo { height: 28px; width: auto; }
.social-proof__rating { font-weight: 700; color: var(--color-heading); }
.social-proof__count { font-size: var(--font-size-sm); color: var(--color-text-muted); }

/* --- Feature Cards Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}
.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
  display: block;
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  color: inherit;
}
.feature-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
}
.feature-card__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}
.feature-card__description {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-md);
}
.feature-card__link {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

/* --- Feature Detail Section (alternating image+text) --- */
.feature-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}
.feature-detail--reverse { direction: rtl; }
.feature-detail--reverse > * { direction: ltr; }
.feature-detail__image img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.feature-detail__content h2 { color: var(--color-heading); }
.feature-detail__list {
  list-style: none;
  padding: 0;
}
.feature-detail__list li {
  position: relative;
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}
.feature-detail__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* --- Comparison Table --- */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.comparison-table thead {
  background: var(--color-primary);
  color: var(--color-white);
}
.comparison-table th,
.comparison-table td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.comparison-table th { font-weight: 600; }
.comparison-table tbody tr:hover { background: var(--color-primary-surface); }
.comparison-table .check { color: var(--color-success); font-weight: 700; }
.comparison-table .cross { color: var(--color-danger); font-weight: 700; }

/* --- Testimonial Cards --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}
.testimonial-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}
.testimonial-card__stars {
  color: #F5A623;
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
}
.testimonial-card__quote {
  font-style: italic;
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}
.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.testimonial-card__name { font-weight: 700; }
.testimonial-card__role { font-size: var(--font-size-sm); color: var(--color-text-muted); }

/* --- FAQ Section --- */
.faq-list {
  max-width: var(--container-narrow);
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-item summary {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-heading);
  padding: var(--space-lg) 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: transform var(--transition-base);
}
.faq-item[open] summary::after {
  content: '−';
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item__answer {
  padding: 0 0 var(--space-lg);
  line-height: 1.8;
  color: var(--color-text-light);
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
  border-radius: var(--radius-xl);
}
.cta-banner h2 { color: var(--color-white); margin-bottom: var(--space-md); }
.cta-banner p { color: rgba(255,255,255,0.9); margin: 0 auto var(--space-xl); }
.cta-banner .btn--primary {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}
.cta-banner .btn--primary:hover {
  background: rgba(255,255,255,0.9);
}

/* --- Final CTA (homepage) --- */
.final-cta {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(135deg, #2e3e8f 0%, #5470CB 55%, #7B61FF 100%);
  color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,0.08) inset;
}
.final-cta__shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  z-index: 0;
  pointer-events: none;
}
.final-cta__shape--top {
  width: 360px; height: 360px;
  background: #9F7BFF;
  top: -120px; right: -120px;
}
.final-cta__shape--bottom {
  width: 280px; height: 280px;
  background: #4DABF7;
  bottom: -100px; left: -80px;
}
.final-cta__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}
.final-cta__eyebrow {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
  backdrop-filter: blur(4px);
}
.final-cta__heading {
  color: var(--color-white);
  font-size: clamp(1.875rem, 3.6vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 var(--space-md);
  letter-spacing: -0.01em;
}
.final-cta__subhead {
  font-size: var(--font-size-lg);
  color: rgba(255,255,255,0.92);
  margin: 0 0 var(--space-lg);
  max-width: 38rem;
}
.final-cta__benefits {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-xl);
  display: grid;
  gap: var(--space-sm);
}
.final-cta__benefits li {
  position: relative;
  padding-left: 2.25rem;
  color: rgba(255,255,255,0.95);
  font-size: var(--font-size-base);
}
.final-cta__benefits li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2rem;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: rgba(255,255,255,0.22);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'><path d='M6.4 11.6 2.4 7.6l1.2-1.2 2.8 2.8 6-6 1.2 1.2z'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px 12px;
}
.final-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}
.final-cta__actions .btn--primary {
  background: var(--color-white);
  color: var(--color-primary-dark);
  border-color: var(--color-white);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.final-cta__actions .btn--primary:hover {
  background: rgba(255,255,255,0.94);
  transform: translateY(-1px);
}
.final-cta__btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 0.875rem 2rem;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-white);
  text-decoration: none;
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.45);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}
.final-cta__btn-ghost:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.75);
}
.final-cta__micro {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.78);
  margin: 0;
}
.final-cta__visual {
  position: relative;
}
.final-cta__visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 60px rgba(15,20,50,0.45), 0 0 0 1px rgba(255,255,255,0.12);
  transform: perspective(1200px) rotateY(-5deg) rotateX(2deg);
}
.final-cta__trust {
  position: relative;
  z-index: 1;
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255,255,255,0.18);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.88);
}
.final-cta__trust-item strong { color: var(--color-white); font-weight: 700; }
.final-cta__trust-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255,255,255,0.45);
}

@media (max-width: 900px) {
  .final-cta { padding: var(--space-2xl) var(--space-lg); }
  .final-cta__grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .final-cta__visual { order: -1; max-width: 480px; margin: 0 auto; }
  .final-cta__visual img { transform: none; }
  .final-cta__actions { flex-direction: column; align-items: stretch; }
  .final-cta__actions .btn--primary,
  .final-cta__btn-ghost { width: 100%; text-align: center; justify-content: center; }
  .final-cta__trust { gap: var(--space-sm); font-size: 0.8125rem; }
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: var(--space-md) 0;
  font-size: var(--font-size-sm);
}
.breadcrumbs__list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: var(--space-sm);
}
.breadcrumbs__item::after { content: '/'; color: var(--color-text-muted); margin-left: var(--space-sm); }
.breadcrumbs__item:last-child::after { display: none; }
.breadcrumbs__link { color: var(--color-text-muted); }
.breadcrumbs__link:hover { color: var(--color-primary); }
.breadcrumbs__current { color: var(--color-text); font-weight: 600; }

/* --- Page Header (for inner pages) --- */
.page-header {
  background: var(--color-primary-surface);
  padding: var(--space-3xl) 0;
  text-align: center;
}
.page-header__eyebrow {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-sm);
}
.page-header__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto;
}

/* --- Site Footer --- */
.site-footer {
  background: var(--color-heading);
  color: rgba(255,255,255,0.8);
  padding: var(--space-4xl) 0 var(--space-xl);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}
.site-footer__brand p { max-width: 300px; }
.site-footer__heading {
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-lg);
}
.site-footer__links {
  list-style: none;
  padding: 0;
}
.site-footer__links li { margin-bottom: var(--space-sm); }
.site-footer__links a {
  color: rgba(255,255,255,0.7);
  font-size: var(--font-size-sm);
}
.site-footer__links a:hover { color: var(--color-white); }
.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
}

/* --- Pricing Cards --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  align-items: start;
}
.pricing-card {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
}
.pricing-card--featured {
  border-color: var(--color-primary);
  position: relative;
}
.pricing-card--featured::before {
  content: 'Most Popular';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-lg);
  border-radius: 20px;
  font-size: var(--font-size-sm);
  font-weight: 600;
}
.pricing-card__name { font-size: var(--font-size-xl); font-weight: 700; margin-bottom: var(--space-sm); }
.pricing-card__price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: var(--space-xs);
}
.pricing-card__price span { font-size: var(--font-size-base); font-weight: 400; color: var(--color-text-muted); }
.pricing-card__features {
  list-style: none;
  padding: 0;
  margin: var(--space-xl) 0;
  text-align: left;
}
.pricing-card__features li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-xl);
  position: relative;
  border-bottom: 1px solid var(--color-border);
}
.pricing-card__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

/* --- Responsive Grid Utilities --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-xl); }

/* --- Text Utilities --- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-muted); }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; text-align: center; }
  .hero__title, .hero__description { max-width: 100%; margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  .hero__image { order: -1; max-width: 600px; margin: 0 auto; }
  .feature-detail { grid-template-columns: 1fr; }
  .feature-detail--reverse { direction: ltr; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .primary-nav { display: flex; align-items: center; }
  .primary-nav__list { display: none; }
  .primary-nav__actions { display: none; }
  .nav-toggle { display: block; }
  .primary-nav__list--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height, 72px);
    left: 0; right: 0;
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
    padding: var(--space-lg);
    gap: var(--space-xs);
    z-index: 999;
  }
  .primary-nav__list--open .primary-nav__link {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border, #eee);
    display: block;
  }
  .primary-nav__list--open .primary-nav__link:hover {
    background: var(--color-surface, #f7f8fa);
  }
  .primary-nav__list--open::after {
    content: '';
    display: flex;
    gap: var(--space-sm);
    padding-top: var(--space-md);
  }
  .site-header .container { position: relative; }
  .social-proof { justify-content: center; gap: var(--space-lg); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: repeat(2, 1fr); }
  .site-footer__bottom { flex-direction: column; gap: var(--space-md); text-align: center; }
  .container { padding: 0 var(--space-md); }
  .section { padding: var(--space-2xl) 0; }
}

@media (max-width: 480px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; }
  .btn--lg { width: 100%; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
}

/* --- Blog Post Layout (hero image, meta, sticky sidebar) --- */
.blog-post-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--space-2xl);
  align-items: start;
  max-width: 1140px;
  margin: 0 auto;
}
.blog-post-main { min-width: 0; }
.blog-hero-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
  background: var(--color-primary-light);
}
.blog-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}
.blog-meta__category {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
}
.blog-meta__author {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}
.blog-meta__avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.blog-meta__separator { color: var(--color-border); }
.blog-sidebar { position: sticky; top: calc(var(--header-height) + var(--space-md)); }
.blog-sticky-cta {
  background: var(--color-primary-surface);
  border: 1px solid var(--color-primary-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}
.blog-sticky-cta h3 {
  font-size: 1.125rem;
  color: var(--color-heading);
  margin-bottom: var(--space-sm);
}
.blog-sticky-cta p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}
.blog-sticky-cta .btn { width: 100%; justify-content: center; text-align: center; }
.blog-sticky-cta .btn + .btn { margin-top: var(--space-sm); }
.blog-sticky-cta__features {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0 0;
  font-size: 0.8125rem;
  color: var(--color-text-light);
}
.blog-sticky-cta__features li {
  padding: var(--space-xs) 0;
  position: relative;
  padding-left: 1.25rem;
}
.blog-sticky-cta__features li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

@media (max-width: 960px) {
  .blog-post-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .blog-sidebar { position: static; }
}