/* Pay2Pay Product Landing Page Style Sheet */
/* Designed with professional, clean, high-tech modern aesthetics */

/* --- Cascade Layers --- */
@layer reset, base, components, layouts, utilities, theme;

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

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

  body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

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

  button, input, select {
    font: inherit;
    background: none;
    border: none;
    color: inherit;
  }

  button {
    cursor: pointer;
  }

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

@layer theme {
  :root {
    color-scheme: light dark;

    /* Theme colors - Light Mode Variables */
    --bg-primary-light: #F6F5FA;
    --bg-secondary-light: #FFFFFF;
    --text-primary-light: #060020;
    --text-secondary-light: #5B5764;
    --border-light: rgba(234, 232, 239, 0.8);
    --card-bg-light: rgba(255, 255, 255, 0.7);
    --card-shadow-light: rgba(99, 67, 240, 0.05);
    --glow-opacity-light: 0.1;
    --header-bg-light: rgba(255, 255, 255, 0.75);

    /* Theme colors - Dark Mode Variables */
    --bg-primary-dark: #060020;
    --bg-secondary-dark: #0A0427;
    --text-primary-dark: #FFFFFF;
    --text-secondary-dark: #A5A2AB;
    --border-dark: rgba(46, 44, 58, 0.6);
    --card-bg-dark: rgba(19, 13, 43, 0.5);
    --card-shadow-dark: rgba(0, 0, 0, 0.4);
    --glow-opacity-dark: 0.25;
    --header-bg-dark: rgba(6, 0, 32, 0.75);

    /* Constant Brand Colors */
    --brand-purple: #6343F0;
    --brand-purple-hover: #5031D8;
    --brand-glow-purple: rgba(99, 67, 240, 0.3);
    --brand-glow-blue: rgba(45, 127, 250, 0.3);
    --brand-glow-green: rgba(30, 209, 142, 0.3);
    
    /* Dynamic Theme Mappings (using light-dark by default) */
    --bg-primary: light-dark(var(--bg-primary-light), var(--bg-primary-dark));
    --bg-secondary: light-dark(var(--bg-secondary-light), var(--bg-secondary-dark));
    --text-primary: light-dark(var(--text-primary-light), var(--text-primary-dark));
    --text-secondary: light-dark(var(--text-secondary-light), var(--text-secondary-dark));
    --border-color: light-dark(var(--border-light), var(--border-dark));
    --card-bg: light-dark(var(--card-bg-light), var(--card-bg-dark));
    --card-shadow: light-dark(var(--card-shadow-light), var(--card-shadow-dark));
    --glow-opacity: light-dark(var(--glow-opacity-light), var(--glow-opacity-dark));
    --header-bg: light-dark(var(--header-bg-light), var(--header-bg-dark));
  }

  /* Manual theme class overrides */
  html.light {
    color-scheme: light;
    --bg-primary: var(--bg-primary-light);
    --bg-secondary: var(--bg-secondary-light);
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --border-color: var(--border-light);
    --card-bg: var(--card-bg-light);
    --card-shadow: var(--card-shadow-light);
    --glow-opacity: var(--glow-opacity-light);
    --header-bg: var(--header-bg-light);
  }

  html.dark {
    color-scheme: dark;
    --bg-primary: var(--bg-primary-dark);
    --bg-secondary: var(--bg-secondary-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --border-color: var(--border-dark);
    --card-bg: var(--card-bg-dark);
    --card-shadow: var(--card-shadow-dark);
    --glow-opacity: var(--glow-opacity-dark);
    --header-bg: var(--header-bg-dark);
  }
}

@layer base {
  body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.4s ease, color 0.4s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
  }

  /* Accent focus states for accessibility */
  *:focus-visible {
    outline: 2px solid var(--brand-purple);
    outline-offset: 4px;
  }

  /* Styling Custom Scrollbars */
  :root {
    --scrollbar-track-color: light-dark(#F1EFF5, #0B0427);
    --scrollbar-thumb-color: light-dark(#D4CFE0, #3C3852);
    scrollbar-color: var(--scrollbar-thumb-color) var(--scrollbar-track-color);
  }
  
  @supports not (scrollbar-color: auto) {
    body::-webkit-scrollbar {
      width: 10px;
    }
    body::-webkit-scrollbar-track {
      background: var(--scrollbar-track-color);
    }
    body::-webkit-scrollbar-thumb {
      background: var(--scrollbar-thumb-color);
      border-radius: 5px;
    }
  }

  /* Font Styling */
  h1, h2, h3, .badge {
    font-family: 'Outfit', 'Inter', sans-serif;
    font-weight: 700;
  }
}

@layer components {
  /* Decorative Blur Backgrounds */
  .decor-blur {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    z-index: 0;
    pointer-events: none;
    opacity: var(--glow-opacity);
    transition: opacity 0.4s ease;
  }

  .blur-1 {
    width: 45vw;
    height: 45vw;
    top: -15vw;
    left: -10vw;
    background: radial-gradient(circle, var(--brand-purple) 0%, rgba(99, 67, 240, 0) 70%);
  }

  .blur-2 {
    width: 40vw;
    height: 40vw;
    top: 35vh;
    right: -10vw;
    background: radial-gradient(circle, #2D7FFA 0%, rgba(45, 127, 250, 0) 70%);
  }

  .blur-3 {
    width: 50vw;
    height: 50vw;
    bottom: -10vw;
    left: 20vw;
    background: radial-gradient(circle, #1ED18E 0%, rgba(30, 209, 142, 0) 70%);
  }

  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    gap: 0.5rem;
    white-space: nowrap;
  }

  .btn-primary {
    background-color: var(--brand-purple);
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(99, 67, 240, 0.3);
  }

  .btn-primary:hover {
    background-color: var(--brand-purple-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 67, 240, 0.4);
  }

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

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

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

  /* Download App SVG Badges */
  .download-badge-link {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), filter 0.3s ease;
    border-radius: 8px;
    overflow: hidden;
    line-height: 0;
  }

  .download-badge-link:hover {
    transform: translateY(-3px);
    filter: drop-shadow(0 6px 15px var(--brand-glow-purple));
  }

  .download-badge-link:active {
    transform: translateY(-1px);
  }

  .store-badge-img {
    height: 42px;
    width: auto;
    display: block;
  }

  /* Theme Toggle */
  .theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.3s ease;
  }

  .theme-toggle:hover {
    border-color: var(--brand-purple);
    color: var(--brand-purple);
    background-color: var(--bg-primary);
    transform: rotate(15deg);
  }

  /* Show/Hide Icons depending on Active Theme */
  html.light .moon-icon { display: block; }
  html.light .sun-icon { display: none; }
  html.dark .moon-icon { display: none; }
  html.dark .sun-icon { display: block; }

  /* Smooth Theme Transition for Icons */
  .sun-icon, .moon-icon {
    transition: transform 0.4s ease;
  }

  /* Language Selector */
  .lang-selector {
    position: relative;
  }

  .lang-btn {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.6rem 1rem;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.88rem;
    transition: all 0.3s ease;
  }

  .lang-btn:hover {
    border-color: var(--brand-purple);
    background-color: var(--bg-primary);
  }

  .dropdown-chevron {
    transition: transform 0.3s ease;
  }

  .lang-selector.open .dropdown-chevron {
    transform: rotate(180deg);
  }

  .lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.5rem;
    list-style: none;
    min-width: 120px;
    box-shadow: 0 10px 25px var(--card-shadow);
    z-index: 1000;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .lang-selector.open .lang-dropdown {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .lang-dropdown li {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
  }

  .lang-dropdown li:hover {
    background-color: var(--brand-purple);
    color: #FFFFFF;
  }

  .lang-dropdown li.active {
    background-color: rgba(99, 67, 240, 0.15);
    color: var(--brand-purple);
  }
}

@layer layouts {
  /* Header Layout */
  .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 76px;
    background-color: var(--header-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
    transition: background-color 0.4s ease, border-color 0.4s ease;
  }

  .header-container {
    max-width: 1280px;
    height: 100%;
    margin: 0 auto;
    padding-inline: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .brand-logo {
    display: block;
    height: 38px;
    width: auto;
    transition: transform 0.3s ease;
  }

  .logo-link:hover .brand-logo {
    transform: scale(1.02);
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
  }

  /* Body Content */
  .main-content {
    margin-top: 76px;
    flex: 1;
    z-index: 1;
  }

  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding-inline: 1.5rem;
  }

  /* Hero Section */
  .hero-section {
    padding-block: 5rem 3.5rem;
    position: relative;
    text-align: center;
  }

  .hero-container {
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }

  .badge {
    background: rgba(99, 67, 240, 0.1);
    color: var(--brand-purple);
    border: 1px solid rgba(99, 67, 240, 0.2);
    padding: 0.4rem 1.2rem;
    border-radius: 50px;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 600;
  }

  .hero-title {
    font-size: clamp(2rem, 5vw, 3.8rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--brand-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: all 0.4s ease;
  }

  .hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 680px;
    line-height: 1.7;
  }

  .hero-cta-group {
    margin-top: 1rem;
  }

  /* Showcase Section */
  .showcase-section {
    padding-block: 4rem 6rem;
  }

  .section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 4rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    letter-spacing: -0.01em;
  }

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

  /* Product Grid List */
  .products-list {
    display: flex;
    flex-direction: column;
    gap: 4rem;
  }

  /* Product Card */
  .product-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 3rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
    box-shadow: 0 20px 40px var(--card-shadow);
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
  }

  .product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px var(--card-shadow);
    border-color: rgba(99, 67, 240, 0.3);
  }

  .product-card.reverse {
    grid-template-columns: 0.8fr 1.2fr;
  }

  .product-card.reverse .product-info {
    grid-column: 2;
  }

  .product-card.reverse .product-visual {
    grid-column: 1;
    grid-row: 1;
  }

  /* Info Side styling */
  .product-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .product-header-wrap {
    display: flex;
    align-items: center;
    gap: 1.25rem;
  }

  .product-logo-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 14px;
    overflow: hidden;
  }

  .product-logo-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  /* Highlight Glow Borders for App Icons */
  .bg-purple-glow {
    background: linear-gradient(135deg, #859EFF 0%, #5427D4 100%);
    box-shadow: 0 8px 24px var(--brand-glow-purple);
  }
  
  .bg-blue-glow {
    background: linear-gradient(135deg, #71B6FC 0%, #155EC2 100%);
    box-shadow: 0 8px 24px var(--brand-glow-blue);
  }
  
  .bg-green-glow {
    background: linear-gradient(135deg, #5EEAD4 0%, #0F766E 100%);
    box-shadow: 0 8px 24px var(--brand-glow-green);
  }

  .product-name {
    font-size: clamp(1.5rem, 3vw, 2.1rem);
    letter-spacing: -0.01em;
  }

  .product-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    text-align: justify;
  }

  .product-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    font-size: 0.95rem;
    font-weight: 500;
  }

  .product-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    color: var(--text-primary);
  }

  .feat-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    flex-shrink: 0;
    margin-top: 1px;
  }

  .feat-icon svg {
    width: 15px;
    height: 15px;
    stroke-width: 2.5px;
  }

  .bg-purple-icon,
  .bg-blue-icon,
  .bg-green-icon {
    background: rgba(84, 39, 212, 0.08);
    color: var(--brand-purple);
  }

  /* Dark mode overrides for icons */
  .dark .bg-purple-icon,
  .dark .bg-blue-icon,
  .dark .bg-green-icon {
    background: rgba(133, 158, 255, 0.15);
    color: #859EFF;
  }

  .product-web-link-sub {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--brand-purple);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.9rem;
    transition: opacity 0.2s ease, transform 0.2s ease;
    margin-top: -0.5rem;
    margin-bottom: 0.25rem;
  }

  .product-web-link-sub:hover {
    opacity: 0.85;
    transform: translateX(2px);
  }

  .product-web-link-sub svg {
    width: 14px;
    height: 14px;
  }

  /* Dark mode overrides */
  .dark .product-web-link-sub {
    color: #859EFF;
  }

  .download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.5rem;
  }

  /* Visual Side (Mockup image) styling */
  .product-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
  }

  /* Screenshot Gallery */
  .screenshot-gallery {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    width: 100%;
  }

  .store-screenshot {
    width: calc(33.33% - 0.5rem);
    max-width: 145px;
    height: auto;
    aspect-ratio: 9 / 19.5; /* Maintain exact iOS screenshot aspect ratio to prevent squishing */
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.4s ease;
    object-fit: cover;
  }

  /* Micro-parallax hover animation for multiple screenshots */
  .product-card:hover .store-screenshot:nth-child(1) {
    transform: translateY(-8px) rotate(-1deg);
    box-shadow: 0 15px 30px rgba(99, 67, 240, 0.15);
  }

  .product-card:hover .store-screenshot:nth-child(2) {
    transform: translateY(-16px) scale(1.02);
    box-shadow: 0 20px 35px rgba(99, 67, 240, 0.2);
  }

  .product-card:hover .store-screenshot:nth-child(3) {
    transform: translateY(-8px) rotate(1deg);
    box-shadow: 0 15px 30px rgba(99, 67, 240, 0.15);
  }

  /* Footer Layout */
  .footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding-block: 3.5rem;
    z-index: 10;
  }

  .footer-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  .footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }

  .footer-logo {
    height: 28px;
    width: auto;
  }

  .footer-copyright {
    font-size: 0.88rem;
    color: var(--text-secondary);
  }

  .footer-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.88rem;
    color: var(--text-secondary);
  }

  .footer-links a {
    transition: color 0.2s ease;
  }

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

  .divider {
    color: var(--border-color);
  }
}

@layer utilities {
  /* Fade-in Transition Utility for Dynamic Text */
  .fade-out {
    opacity: 0;
    transform: translateY(4px);
  }

  .fade-in-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
}

/* --- Responsive Media Queries --- */

/* Tablet & Smaller Screen Adaptation */
@media (max-width: 1024px) {
  .product-card {
    grid-template-columns: 1fr;
    gap: 3rem;
    padding: 2.5rem;
  }

  .product-card.reverse {
    grid-template-columns: 1fr;
  }

  .product-card.reverse .product-info {
    grid-column: 1;
  }

  .product-card.reverse .product-visual {
    grid-column: 1;
    grid-row: 2;
  }

  .product-visual {
    grid-row: 2;
  }

  .screenshot-gallery {
    gap: 0.5rem;
  }

  .store-screenshot {
    width: calc(33.33% - 0.35rem);
    max-width: 130px;
    height: auto;
  }
}

/* Mobile Screen Layout */
@media (max-width: 768px) {
  .header-container {
    padding-inline: 1rem;
  }

  .back-to-home {
    display: none; /* Hide on mobile to save space */
  }

  .hero-section {
    padding-block: 4rem 2.5rem;
  }

  .hero-title {
    font-size: 2.3rem;
  }

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


  .download-buttons {
    width: 100%;
  }

  .download-badge-link {
    flex: 0 1 auto;
  }

  .store-badge-img {
    height: 38px; /* Slightly smaller on small mobile devices */
  }

  .footer-brand {
    align-items: center;
    text-align: center;
  }

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

  /* Mobile Gallery Sliders */
  .screenshot-gallery {
    justify-content: flex-start;
    overflow-x: auto;
    width: calc(100% + 3rem);
    margin-inline: -1.5rem;
    padding-inline: 1.5rem;
    padding-block: 0.5rem 1rem;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Hide default scrollbar on mobile Firefox */
  }

  .screenshot-gallery::-webkit-scrollbar {
    display: none; /* Hide default scrollbar on mobile WebKit */
  }

  .store-screenshot {
    flex: 0 0 auto;
    scroll-snap-align: center;
    width: 135px; /* Fixed width on mobile slider for predictability */
    height: auto;
    aspect-ratio: 9 / 19.5;
  }
}