/**
 * Petwise Landing Site - Stylesheet
 * Design System + Mobile-First Responsive Layout
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
  /* Colors - Brand */
  --color-primary: #4DBDBE;
  --color-primary-dark: #3a9a9b;
  --color-accent: #F67549;
  --color-accent-dark: #e25f33;

  /* Colors - Neutral */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Colors - Semantic */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.nav-open {
  overflow: hidden;
}

img,
picture,
video,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul,
ol {
  list-style: none;
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-gray-800);
  color: var(--color-white);
  border-radius: var(--radius-md);
  z-index: var(--z-modal);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ============================================
   Container
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-6);
  }
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
  position: sticky;
  top: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: var(--z-sticky);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo img {
  height: 32px;
  width: auto;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: var(--z-modal);
}

.nav-toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--color-gray-700);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.nav-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background: var(--color-white);
  padding: 80px var(--space-6) var(--space-6);
  box-shadow: var(--shadow-xl);
  transition: right var(--transition-slow);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.nav-menu.nav-open {
  right: 0;
}

.nav-menu a {
  display: block;
  padding: var(--space-3) 0;
  font-weight: 500;
  color: var(--color-gray-700);
  transition: color var(--transition-fast);
}

.nav-menu a:hover {
  color: var(--color-primary);
}

.nav-link-login {
  font-weight: 500;
  color: var(--color-gray-700);
}

.nav-link-login:hover {
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    width: auto;
    max-width: none;
    height: auto;
    background: transparent;
    padding: 0;
    box-shadow: none;
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
  }

  .nav-menu a {
    padding: var(--space-2) 0;
    font-size: var(--font-size-sm);
  }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  min-height: 48px;
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  min-height: 44px;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  min-height: 52px;
  font-size: var(--font-size-base);
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  box-shadow: 0 4px 14px 0 rgb(99 102 241 / 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px 0 rgb(99 102 241 / 0.4);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
}

.btn-secondary:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-accent);
}

.btn-white:hover {
  background: var(--color-gray-50);
}

.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  padding: var(--space-16) 0 var(--space-20);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-gray-100) 100%);
  z-index: -2;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 20%, rgba(77, 189, 190, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(246, 117, 73, 0.1) 0%, transparent 50%);
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gray-800);
  margin-bottom: var(--space-6);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  margin-bottom: var(--space-6);
}

.hero-note {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

@media (min-width: 768px) {
  .hero {
    padding: var(--space-24) 0;
  }

  .hero-title {
    font-size: var(--font-size-5xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-xl);
  }

  .hero-cta {
    flex-direction: row;
    justify-content: center;
  }
}

/* ============================================
   Sections
   ============================================ */
.section {
  padding: var(--space-16) 0;
}

.section-alt {
  background: var(--color-gray-50);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-gray-800);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-500);
  max-width: 600px;
  margin: 0 auto;
}

.section-text {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-20) 0;
  }

  .section-title {
    font-size: var(--font-size-4xl);
  }
}

/* ============================================
   Badge
   ============================================ */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: rgba(77, 189, 190, 0.1);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.badge-alt {
  color: var(--color-accent);
  background: rgba(246, 117, 73, 0.1);
}

/* ============================================
   Steps Grid (How It Works)
   ============================================ */
.steps-grid {
  display: grid;
  gap: var(--space-6);
}

.step-card {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: all var(--transition-base);
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.step-number {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
}

.step-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--space-2);
}

.step-text {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .steps-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   Split Content (For Businesses / For Owners)
   ============================================ */
.split-content {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}

.split-text {
  max-width: 560px;
}

.split-text .section-title {
  text-align: left;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--font-size-base);
  color: var(--color-gray-700);
}

.check-icon {
  flex-shrink: 0;
  color: var(--color-success);
  margin-top: 2px;
}

.split-visual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.visual-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition-base);
}

.visual-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.visual-card:first-child {
  grid-column: span 2;
}

.visual-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
}

.visual-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-700);
}

@media (min-width: 1024px) {
  .split-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }

  .split-reverse {
    direction: rtl;
  }

  .split-reverse > * {
    direction: ltr;
  }
}

/* ============================================
   Phone Mockup (Pet Owners Section)
   ============================================ */
.phone-mockup {
  width: 280px;
  margin: 0 auto;
  background: var(--color-gray-800);
  border-radius: 40px;
  padding: 12px;
  box-shadow: var(--shadow-xl);
}

.phone-screen {
  background: var(--color-white);
  border-radius: 32px;
  padding: var(--space-6);
  min-height: 400px;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.mockup-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-full);
}

.mockup-name {
  font-weight: 600;
  color: var(--color-gray-800);
}

.mockup-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.mockup-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
}

.mockup-status {
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.mockup-status-valid {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
}

.mockup-status-expiring {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.mockup-qr {
  display: flex;
  justify-content: center;
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  color: var(--color-gray-400);
}

/* ============================================
   Trust Grid (Security Section)
   ============================================ */
.trust-grid {
  display: grid;
  gap: var(--space-6);
}

.trust-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

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

.trust-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
}

.trust-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--space-1);
}

.trust-text {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

@media (min-width: 768px) {
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .trust-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .trust-card {
    flex-direction: column;
    text-align: center;
  }

  .trust-icon {
    margin: 0 auto;
  }
}

/* ============================================
   Pricing Grid
   ============================================ */
.pricing-grid {
  display: grid;
  gap: var(--space-6);
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.pricing-featured {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border: none;
  color: var(--color-white);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-1) var(--space-4);
  background: var(--color-accent);
  color: var(--color-white);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
}

.pricing-header {
  margin-bottom: var(--space-4);
}

.pricing-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.pricing-featured .pricing-name {
  color: var(--color-white);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
}

.price-amount {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-gray-800);
}

.pricing-featured .price-amount {
  color: var(--color-white);
}

.price-period {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.pricing-featured .price-period {
  color: rgba(255, 255, 255, 0.8);
}

.pricing-description {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-6);
}

.pricing-featured .pricing-description {
  color: rgba(255, 255, 255, 0.9);
}

.pricing-features {
  margin-bottom: var(--space-8);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
}

.pricing-features li::before {
  content: '';
  width: 16px;
  height: 16px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2310b981' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/contain no-repeat;
  flex-shrink: 0;
}

.pricing-featured .pricing-features li::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='white' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
}

.pricing-featured .btn-primary {
  background: var(--color-white);
  color: var(--color-accent);
  box-shadow: none;
}

.pricing-featured .btn-primary:hover {
  background: var(--color-gray-50);
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  text-align: center;
}

.cta-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.cta-text {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

@media (min-width: 768px) {
  .cta-title {
    font-size: var(--font-size-4xl);
  }

  .cta-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-gray-800);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand {
  max-width: 280px;
}

.footer-logo {
  height: 32px;
  width: auto;
  margin-bottom: var(--space-4);
  filter: brightness(0) invert(1);
}

.footer-tagline {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-4);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--color-gray-300);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.footer-nav {
  min-width: 140px;
}

.footer-heading {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-nav a {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-gray-700);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* ============================================
   Newsletter Section
   ============================================ */
.newsletter-section {
  background: var(--color-gray-50);
  text-align: center;
}

.newsletter-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
}

.newsletter-text {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.newsletter-form {
  max-width: 480px;
  margin: 0 auto var(--space-4);
}

.newsletter-input-group {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}

.newsletter-input {
  flex: 1;
  min-width: 200px;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.newsletter-input::placeholder {
  color: var(--color-gray-400);
}

.newsletter-btn {
  flex-shrink: 0;
}

.newsletter-privacy {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.newsletter-privacy a {
  color: var(--color-primary);
  text-decoration: underline;
}

.newsletter-privacy a:hover {
  color: var(--color-primary-dark);
}

.newsletter-success {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-success);
  padding: var(--space-4);
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-md);
}

.newsletter-error {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--space-2);
}

@media (min-width: 640px) {
  .newsletter-title {
    font-size: var(--font-size-3xl);
  }

  .newsletter-input-group {
    flex-wrap: nowrap;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.sr-only,
.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;
}

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

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

/* ============================================
   Page-Specific Styles
   ============================================ */

/* Active nav link */
.nav-active {
  color: var(--color-primary) !important;
  font-weight: 600;
}

/* Feature heading (for subsections) */
.feature-heading {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .feature-heading {
    font-size: var(--font-size-3xl);
  }
}

/* Larger visual card variant */
.visual-card-lg {
  padding: var(--space-8);
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.visual-card-lg .visual-icon {
  width: 100px;
  height: 100px;
  margin-bottom: var(--space-4);
}

.visual-card-lg .visual-icon svg {
  width: 64px;
  height: 64px;
}

/* Pricing grid variants */
.pricing-grid-2 {
  display: grid;
  gap: var(--space-8);
  max-width: 800px;
  margin: 0 auto;
}

.pricing-grid-1 {
  display: grid;
  gap: var(--space-8);
  max-width: 400px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .pricing-grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* FAQ Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  padding: var(--space-6);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
}

.faq-answer {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: 1.7;
}

@media (min-width: 768px) {
  .faq-item {
    padding: var(--space-8);
  }

  .faq-question {
    font-size: var(--font-size-xl);
  }
}