/* ==========================================================================
   IOUly Landing Page Design System & Stylesheet
   Color Palette:
   Page BG: #0F1411 | Card Surface: #18211D | Secondary Surface: #1F2A25
   Primary Text: #E7ECEA | Secondary Text: #9AA8A2
   Brand Accent: #35C08E | Deep Green: #187860 -> #006048
   Positive: #35C08E | Negative: #EA7A6F | Warning: #E0A44A
   Hairline Border: rgba(255, 255, 255, 0.08)
   ========================================================================== */

:root {
  --bg-page: #0F1411;
  --bg-card: #18211D;
  --bg-surface: #1F2A25;
  --bg-elevated: #24312B;
  
  --border-hairline: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(53, 192, 142, 0.3);

  --text-primary: #E7ECEA;
  --text-secondary: #9AA8A2;
  --text-muted: #6B7C75;

  --color-brand: #35C08E;
  --color-brand-deep: #187860;
  --color-brand-dark: #006048;
  --color-owed: #35C08E;
  --color-owe: #EA7A6F;
  --color-warning: #E0A44A;

  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;

  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.3);
  --shadow-bezel: 0 20px 50px rgba(0, 0, 0, 0.5);

  --container-max: 1200px;
  --container-narrow: 840px;
}

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

html {
  font-family: var(--font-stack);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Focus States for Accessibility */
:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* Typography Base */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.75rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  margin-bottom: 0.5rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  line-height: 1.65;
}

a {
  color: var(--color-brand);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  text-decoration: underline;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--border-hairline);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 4rem auto;
}

.section-header p {
  font-size: 1.2rem;
}

/* Fallback Redirect Banner */
.redirect-banner {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-accent);
  padding: 0.75rem 1rem;
  text-align: center;
  font-size: 0.95rem;
}

.redirect-link {
  color: var(--color-brand);
  font-weight: 600;
}

/* Site Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(15, 20, 17, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-hairline);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-cta-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease;
  border: none;
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--color-brand), var(--color-brand-deep));
  color: #0F1411;
  font-weight: 700;
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-card);
}

.btn-secondary:hover {
  background-color: var(--bg-elevated);
}

.store-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.store-btn:hover {
  background-color: var(--bg-surface);
  border-color: var(--color-brand);
  transform: translateY(-2px);
  text-decoration: none;
}

.store-btn svg {
  width: 26px;
  height: 26px;
  fill: currentColor;
}

.store-btn-text {
  display: flex;
  flex-direction: column;
  text-align: left;
  line-height: 1.15;
}

.store-btn-subtitle {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.store-btn-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Phone Bezel Frame */
.phone-bezel {
  position: relative;
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
  background: #1A231F;
  border: 12px solid #283630;
  border-radius: 46px;
  box-shadow: var(--shadow-bezel);
  overflow: hidden;
}

.phone-notch {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 24px;
  background-color: #0F1411;
  border-radius: 20px;
  z-index: 10;
}

.phone-screen-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 34px;
}

/* Section 1: Hero */
.hero-section {
  padding: 5rem 0 6rem 0;
  background: radial-gradient(circle at 50% 20%, rgba(53, 192, 142, 0.07) 0%, transparent 60%);
  border-bottom: 1px solid var(--border-hairline);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  margin-bottom: 1rem;
}

.hero-tagline {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-brand);
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  max-width: 580px;
}

.trust-badge-bar {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.trust-badge-bar span {
  color: var(--color-brand);
}

/* Section 2: AI Quotable Definition */
.definition-section {
  background-color: var(--bg-card);
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-hairline);
}

.quote-box {
  background: var(--bg-surface);
  border-left: 4px solid var(--color-brand);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 2rem 2.5rem;
}

.definition-text {
  font-size: 1.35rem;
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 500;
}

/* Section 3: The Problem */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.problem-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.problem-card h3 {
  color: var(--color-owe);
  margin-bottom: 1rem;
}

.solution-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.solution-card h3 {
  color: var(--color-brand);
  margin-bottom: 1rem;
}

/* Section 4: Features Grid */
.features-group {
  margin-bottom: 4rem;
}

.features-group:last-child {
  margin-bottom: 0;
}

.features-group-title {
  font-size: 1.4rem;
  color: var(--color-brand);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background-color: var(--bg-surface);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-brand);
  margin-bottom: 1.25rem;
  font-size: 1.3rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.98rem;
  line-height: 1.55;
}

/* Section 5: Partial Payments */
.partial-section {
  background: radial-gradient(circle at 70% 50%, rgba(53, 192, 142, 0.05) 0%, transparent 60%);
}

.partial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.partial-content h2 {
  margin-bottom: 1rem;
}

.partial-answer {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.partial-answer p {
  font-size: 1.05rem;
  color: var(--text-primary);
}

.highlight-badge {
  display: inline-block;
  background-color: var(--bg-surface);
  color: var(--color-brand);
  border: 1px solid var(--border-accent);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

/* Section 6: Screenshots Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.gallery-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gallery-caption {
  margin-top: 1.25rem;
  text-align: center;
}

.gallery-caption h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.gallery-caption p {
  font-size: 0.9rem;
}

/* Section 7: Privacy */
.privacy-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 3rem;
  margin-top: 2rem;
}

.privacy-bullets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.privacy-bullet h4 {
  color: var(--color-brand);
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

/* Section 8: Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: stretch;
  margin-top: 3rem;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card-pro {
  border-color: var(--color-brand);
  background-color: var(--bg-card);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  right: 24px;
  background: linear-gradient(135deg, var(--color-brand), var(--color-brand-deep));
  color: #0F1411;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
}

.pricing-card h3 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 1rem 0 0.5rem 0;
  line-height: 1;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin: 2rem 0;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.pricing-features li svg {
  width: 20px;
  height: 20px;
  fill: var(--color-brand);
  flex-shrink: 0;
}

.lifetime-banner {
  margin-top: 2rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  text-align: center;
}

.lifetime-banner h4 {
  color: var(--color-brand);
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

/* Section 9: FAQ Accordion */
.faq-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 3rem;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item.active {
  border-color: var(--border-accent);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 1.5rem 2rem;
  text-align: left;
  font-family: inherit;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-question:hover {
  color: var(--color-brand);
}

.faq-icon {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
  fill: var(--text-secondary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  fill: var(--color-brand);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 2rem 1.75rem 2rem;
}

.faq-answer p {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* Section 10: Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-hairline);
  padding: 4rem 0 2rem 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.footer-links h4 {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-hairline);
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.powered-by {
  color: var(--text-secondary);

}

.powered-by a {
  color: var(--color-brand);
  font-weight: 600;
}

/* Mobile Responsive Adjustments */
@media (max-width: 900px) {
  .hero-grid,
  .problem-grid,
  .partial-grid,
  .pricing-grid,
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .store-btn-group {
    justify-content: center;
  }

  .phone-bezel {
    max-width: 300px;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 4rem 0;
  }

  .trust-badge-bar {
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    justify-content: center;
  }

  .pricing-card {
    padding: 2rem 1.5rem;
  }

  .faq-question {
    padding: 1.25rem 1.25rem;
    font-size: 1.1rem;
  }

  .faq-item.active .faq-answer {
    padding: 0 1.25rem 1.25rem 1.25rem;
  }
}

/* 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;
  }
}