/* ==========================================================================
   KDPPower - KidsVerse Studio Affiliate Website
   Styles: Clean, Responsive, Accessible, Mobile-First Design System
   ========================================================================== */

/* Import Google Fonts: Nunito (Body) & Poppins (Headings/Buttons) */
@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,600;0,700;0,800;1,400&family=Poppins:wght@600;700;800&display=swap');

/* --- CSS Variables & Design Tokens --- */
:root {
  --color-primary: #B2E4FD;
  --color-primary-hover: #79CCF7;
  --color-primary-active: #50B9F3;
  --color-primary-border: #62BFF5;
  --color-primary-tint: #E8F7FE;

  --color-bg-page: #FFF6FB;
  --color-bg-card: #FFFFFF;
  --color-bg-alt: #F8F1F6;

  --color-text-main: #0F2A3D;
  --color-text-muted: #3D5A70;
  --color-text-subtle: #5C7688;

  --color-accent-amber: #FFE8A3;
  --color-accent-green: #D4F4DD;
  --color-accent-badge: #0F2A3D;
  --color-border: #E8DEE5;

  --font-body: 'Nunito', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Poppins', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(15, 42, 61, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 42, 61, 0.07);
  --shadow-lg: 0 16px 36px rgba(15, 42, 61, 0.1);
  --shadow-hover: 0 12px 28px rgba(15, 42, 61, 0.12);

  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s ease;
  --container-max: 1180px;
  --container-narrow: 840px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-page);
  color: var(--color-text-main);
  line-height: 1.68;
  font-size: 1.0625rem;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

button, input {
  font-family: inherit;
  font-size: inherit;
}

ul, ol {
  list-style: none;
}

/* --- Accessibility & Focus States --- */
:focus-visible {
  outline: 3px solid var(--color-primary-active);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 1rem;
  background: var(--color-text-main);
  color: #FFFFFF;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-weight: 700;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-text-main);
  line-height: 1.25;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

h1 {
  font-size: clamp(2rem, 4.5vw + 1rem, 3.25rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.6rem, 2.8vw + 0.5rem, 2.35rem);
  letter-spacing: -0.015em;
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.25rem, 1.8vw + 0.3rem, 1.6rem);
  margin-bottom: 0.6rem;
}

h4 {
  font-size: 1.15rem;
}

p {
  margin-bottom: 1.15rem;
  color: var(--color-text-main);
}

p.lead {
  font-size: 1.2rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

strong {
  font-weight: 800;
}

/* --- Container & Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.section {
  padding: 4.5rem 0;
  position: relative;
}

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

.section-card-bg {
  background-color: #FFFFFF;
}

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

.section-header {
  max-width: 720px;
  margin: 0 auto 3rem auto;
  text-align: center;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  margin-bottom: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-primary);
  color: var(--color-text-main);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
  border: 1px solid var(--color-primary-border);
}

.badge-alt {
  background-color: var(--color-accent-green);
  border-color: #A9E2B8;
}

/* --- Buttons & CTAs --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.0625rem;
  padding: 0.95rem 2rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-main);
  border-color: var(--color-primary-border);
  box-shadow: 0 4px 14px rgba(98, 191, 245, 0.35);
}

.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-active);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(98, 191, 245, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--color-text-main);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  background-color: var(--color-primary-tint);
  border-color: var(--color-primary-border);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.6rem 1.25rem;
  font-size: 0.9375rem;
}

.btn-lg {
  padding: 1.15rem 2.4rem;
  font-size: 1.1875rem;
}

.btn-block {
  width: 100%;
}

.btn svg {
  width: 1.2rem;
  height: 1.2rem;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(3px);
}

/* --- Sticky Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 246, 251, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(232, 222, 229, 0.7);
  transition: box-shadow var(--transition-fast);
}

.site-header.is-scrolled {
  box-shadow: 0 4px 20px rgba(15, 42, 61, 0.06);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.45rem;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background-color: var(--color-primary);
  border: 2px solid var(--color-primary-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-main);
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--color-text-main);
  padding: 0.5rem 0.2rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: #12557B;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-primary-border);
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  cursor: pointer;
  color: var(--color-text-main);
}

.nav-mobile {
  display: none;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem 2rem 1.5rem;
  box-shadow: var(--shadow-md);
}

.nav-mobile.is-open {
  display: block;
}

.nav-mobile-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-mobile-list .nav-link {
  font-size: 1.1rem;
  padding: 0.5rem 0;
  display: block;
}

.nav-mobile-cta {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

/* --- Hero Section --- */
.hero {
  padding: 4.5rem 0 4rem 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-content {
  max-width: 650px;
}

.hero-title {
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.18rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  margin-bottom: 1.85rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-trust-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
}

.hero-trust-item svg {
  width: 18px;
  height: 18px;
  color: #1A8356;
}

.hero-visual {
  background: #FFFFFF;
  border: 2px solid var(--color-primary-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.hero-visual-card {
  background: var(--color-bg-page);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid var(--color-border);
}

/* --- Cards & Grid Layouts --- */
.card-grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.card-grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.card-grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary);
  border: 1px solid var(--color-primary-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-text-main);
  flex-shrink: 0;
}

.card-icon svg {
  width: 28px;
  height: 28px;
}

.card-title {
  font-size: 1.35rem;
  margin-bottom: 0.65rem;
}

.card-text {
  color: var(--color-text-muted);
  font-size: 1.02rem;
  margin-bottom: 0;
  flex-grow: 1;
}

/* --- Step Cards (How It Works) --- */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  counter-reset: step-counter;
}

.step-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.step-number {
  position: absolute;
  top: -15px;
  left: 24px;
  background-color: var(--color-primary);
  border: 2px solid var(--color-primary-border);
  color: var(--color-text-main);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
}

.step-card h3 {
  margin-top: 0.5rem;
}

/* --- Honest Review / Pros & Considerations --- */
.review-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.review-box {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.review-box.pros {
  border-top: 5px solid #28A745;
}

.review-box.cons {
  border-top: 5px solid #E67E22;
}

.review-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.25rem;
}

.review-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 1.02rem;
  color: var(--color-text-main);
}

.review-list li svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.pros svg {
  color: #28A745;
}

.cons svg {
  color: #E67E22;
}

/* --- Callout Box / Banner --- */
.callout {
  background-color: var(--color-primary-tint);
  border: 2px solid var(--color-primary-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2.5rem 0;
}

.callout h3 {
  color: var(--color-text-main);
  margin-bottom: 0.5rem;
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout-warning {
  background-color: #FFF9E6;
  border-color: #F4C443;
}

/* --- Pricing Card --- */
.pricing-wrap {
  max-width: 560px;
  margin: 0 auto;
}

.pricing-card {
  background: #FFFFFF;
  border: 3px solid var(--color-primary-border);
  border-radius: var(--radius-xl);
  padding: 3rem 2.25rem;
  box-shadow: var(--shadow-lg);
  text-align: center;
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  border: 2px solid var(--color-primary-border);
  color: var(--color-text-main);
  padding: 0.45rem 1.4rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.35rem;
  margin: 1.5rem 0 0.5rem 0;
}

.pricing-currency {
  font-size: 2rem;
  font-weight: 700;
}

.pricing-amount {
  font-family: var(--font-heading);
  font-size: 4.25rem;
  font-weight: 800;
  line-height: 1;
}

.pricing-terms {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1.75rem;
}

.pricing-features {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin: 2rem 0;
  padding: 1.75rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.02rem;
}

.pricing-features svg {
  width: 20px;
  height: 20px;
  color: #1A8356;
  flex-shrink: 0;
}

.pricing-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.25rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.pricing-guarantee svg {
  width: 22px;
  height: 22px;
  color: #1A8356;
}

/* --- FAQs Accordion / Cards --- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-primary-border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.35rem 1.6rem;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
  cursor: pointer;
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1.6rem 1.5rem 1.6rem;
  color: var(--color-text-muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* --- Final CTA Section --- */
.cta-banner {
  background: linear-gradient(135deg, #E6F6FE 0%, #FFF0F8 100%);
  border: 2px solid var(--color-primary-border);
  border-radius: var(--radius-xl);
  padding: 4rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3.2vw + 0.5rem, 2.6rem);
  margin-bottom: 1rem;
}

.cta-banner p {
  max-width: 650px;
  margin: 0 auto 2rem auto;
  font-size: 1.15rem;
  color: var(--color-text-muted);
}

/* --- Legal / Content Pages Layout --- */
.content-body {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  margin-top: 2rem;
}

.content-body h2 {
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.content-body h2:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.content-body ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--color-text-main);
}

.content-body ul li {
  margin-bottom: 0.5rem;
}

/* --- Site Footer --- */
.site-footer {
  background-color: #0F2A3D;
  color: #EDF4F9;
  padding: 4.5rem 0 2rem 0;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.footer-brand p {
  color: #B5CBD8;
  font-size: 0.98rem;
  max-width: 380px;
}

.footer-links-title {
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links-list a {
  color: #B5CBD8;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  font-size: 0.88rem;
  color: #9BB8C9;
}

.footer-disclosure {
  line-height: 1.6;
  background: rgba(255, 255, 255, 0.04);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-primary);
}

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

/* --- Media Queries for Responsive Design --- */
@media (min-width: 640px) {
  .card-grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-buttons {
    flex-direction: row;
  }
}

@media (min-width: 768px) {
  .section {
    padding: 5.5rem 0;
  }

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

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

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

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .content-body {
    padding: 3.5rem 3rem;
  }
}

@media (min-width: 992px) {
  .nav-desktop {
    display: flex;
  }

  .mobile-menu-btn {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }

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

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