/* ==========================================================================
   Marketing Guru 33913 - Custom CSS (Stripe-Inspired, PPC-Blue Accent)
   ========================================================================== */

/* Import high-quality typography from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Source+Code+Pro:wght@500;700&display=swap');

/* Reset and Core Variables */
:root {
  /* Color Palette - adapted from Stripe with PPC-Blue (#1e40af) */
  --color-primary: #1e40af;       /* Serious analytical PPC Blue */
  --color-primary-hover: #1d4ed8; /* Darker blue for hover states */
  --color-primary-light: #dbeafe; /* Soft blue tint */
  --color-primary-border: #93c5fd;/* Accent borders */
  
  --color-bg: #ffffff;            /* Pure white background */
  --color-bg-alt: #f8fafc;        /* Soft slate/white for alternating sections */
  --color-dark-section: #101e30;  /* Immersive dark brand indigo/navy */
  --color-dark-card: rgba(255, 255, 255, 0.04);
  --color-dark-border: rgba(255, 255, 255, 0.1);
  
  --color-heading: #061b31;       /* Stripe signature Deep Navy for high warmth */
  --color-label: #273951;         /* Slate label color */
  --color-body: #334155;          /* Darker slate for excellent AAA readability */
  --color-body-muted: #64748d;    /* Secondary/muted slate text */
  --color-white: #ffffff;
  
  --color-border: #e2e8f0;        /* Card and divider border */
  --color-border-soft: #f1f5f9;   /* Very subtle borders */
  
  /* Status Colors */
  --color-success: #15be53;
  --color-success-bg: rgba(21, 190, 83, 0.15);
  --color-success-text: #108c3d;
  
  /* Spacing Grid (8pt system) */
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-xxl: 64px;
  --space-xxxl: 96px;
  --space-huge: 128px;
  
  /* Border Radii */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  
  /* Shadow Elevation System */
  --shadow-sm: 0 2px 4px rgba(23, 23, 23, 0.05);
  --shadow-md: 0 15px 35px rgba(23, 23, 23, 0.08);
  --shadow-lg: 0 30px 45px -30px rgba(50, 50, 93, 0.2), 0 18px 36px -18px rgba(0, 0, 0, 0.1);
  --shadow-lg-blue: 0 30px 45px -30px rgba(30, 64, 175, 0.25), 0 18px 36px -18px rgba(0, 0, 0, 0.1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-weight: 300;
  line-height: 1.5;
  background-color: var(--color-bg);
  color: var(--color-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Enable OpenType features for custom font geometry, characteristic of Stripe's style */
h1, h2, h3, h4, h5, h6, p, span, a, li {
  font-feature-settings: "ss01" on, "cv10" on;
}

/* Layout container */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  width: 100%;
}

.section-padding {
  padding: var(--space-xxl) 0;
}

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

/* Typography styles matching the Stripe specifications */
h1, h2, h3, h4 {
  color: var(--color-heading);
  font-weight: 300;
}

h1 {
  font-size: 3.5rem; /* 56px */
  line-height: 1.08;
  letter-spacing: -0.04em; /* -1.4px at 56px */
}

h2 {
  font-size: 2.25rem; /* 36px */
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: 1.625rem; /* 26px */
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-xs);
}

h4 {
  font-size: 1.25rem; /* 20px */
  line-height: 1.3;
  font-weight: 400;
}

p {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-body);
  margin-bottom: var(--space-sm);
}

p.lead {
  font-size: 1.125rem; /* 18px */
  line-height: 1.6;
  color: var(--color-body-muted);
}

/* Code block typography */
code, pre {
  font-family: 'Source Code Pro', SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.8125rem; /* 13px */
}

pre {
  line-height: 1.8;
  background-color: var(--color-dark-section);
  border: 1px solid var(--color-dark-border);
  color: #a5b4fc;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

/* Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-soft);
  transition: all 0.2s ease;
}

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

.logo {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-heading);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.logo-dot {
  width: 10px;
  height: 10px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: inline-block;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--space-md);
}

.nav-link {
  font-size: 0.875rem; /* 14px */
  font-weight: 400;
  color: var(--color-label);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  font-size: 0.9375rem; /* 15px */
  font-weight: 400;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 4px 12px rgba(30, 64, 175, 0.15);
}

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

.btn-secondary:hover {
  background-color: rgba(30, 64, 175, 0.04);
  border-color: var(--color-primary);
}

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

.btn-white:hover {
  background-color: var(--color-bg-alt);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Hero Section */
.hero-section {
  padding: var(--space-xxxl) 0 var(--space-xxl) 0;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 80% 20%, #eff6ff 0%, #ffffff 100%);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  max-width: 800px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  padding: 4px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: 20px;
  margin-bottom: var(--space-md);
  border: 1px solid rgba(147, 197, 253, 0.3);
}

.hero-title {
  margin-bottom: var(--space-md);
}

.hero-description {
  margin-bottom: var(--space-lg);
}

.hero-ctas {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Feature Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 992px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

/* Cards style */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

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

.card-title {
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.card-icon {
  color: var(--color-primary);
  display: flex;
  align-items: center;
}

.card-description {
  color: var(--color-body);
  font-size: 0.9375rem;
}

/* Bullet list overrides */
.bullet-list {
  list-style: none;
}

.bullet-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-body);
}

.bullet-list li::before {
  content: "•";
  position: absolute;
  left: 8px;
  color: var(--color-primary);
  font-weight: bold;
}

/* Alternating sections */
.section-alt {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-soft);
  border-bottom: 1px solid var(--color-border-soft);
}

/* Immersive Dark Section */
.section-dark {
  background-color: var(--color-dark-section);
  color: rgba(255, 255, 255, 0.8);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.section-dark h2, .section-dark h3, .section-dark h4 {
  color: var(--color-white);
}

.section-dark p {
  color: rgba(255, 255, 255, 0.7);
}

.section-dark .card {
  background-color: var(--color-dark-card);
  border-color: var(--color-dark-border);
}

.section-dark .card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background-color: rgba(255, 255, 255, 0.06);
}

.section-dark .card-icon {
  color: #60a5fa; /* Muted light blue for dark themes */
}

.section-dark .bullet-list li {
  color: rgba(255, 255, 255, 0.75);
}

.section-dark .bullet-list li::before {
  color: #60a5fa;
}

/* Badges */
.badge-success {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(21, 190, 83, 0.2);
}

/* Highlight badge */
.badge-highlight {
  display: inline-block;
  background-color: #fef08a;
  color: #854d0e;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

/* Callout Box */
.callout {
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-bg-alt);
  padding: var(--space-md);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-top: var(--space-md);
}

.section-dark .callout {
  border-left-color: #60a5fa;
  background-color: rgba(255, 255, 255, 0.02);
}

/* Legal pages formatting */
.legal-container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-xxl) var(--space-md);
}

.legal-title {
  margin-bottom: var(--space-xs);
}

.legal-meta {
  color: var(--color-body-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-xl);
}

.legal-content h2 {
  font-size: 1.5rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-heading);
}

.legal-content p {
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

/* Contact form / card */
.contact-card {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg-blue);
  border-color: var(--color-primary-light);
}

/* Footer styles */
.footer {
  background-color: var(--color-bg-alt);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border-soft);
  font-size: 0.875rem; /* 14px */
  color: var(--color-body-muted);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.footer-link {
  color: var(--color-body-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

@media (max-width: 640px) {
  .footer-container {
    flex-direction: column;
    text-align: center;
  }
}

/* Utilities */
.text-center { text-align: center; }
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }

/* Mobile navigation toggle classes */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-heading);
  cursor: pointer;
  font-size: 1.5rem;
}

@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    flex-direction: column;
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-sm);
    align-items: flex-start;
  }
  
  .nav-menu.active {
    display: flex;
  }
}

/* Added Styling Utilities */
code {
  font-family: 'Source Code Pro', SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875em;
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.section-dark code {
  background-color: rgba(255, 255, 255, 0.08);
  color: #a5b4fc;
  border-color: var(--color-dark-border);
}

.timeline {
  position: relative;
  padding-left: var(--space-lg);
  border-left: 2px solid var(--color-border);
  margin-left: var(--space-xs);
  margin-top: var(--space-md);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-lg);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-lg) - 7px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 2px solid var(--color-bg);
}

.timeline-date {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-xxs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

@media (max-width: 768px) {
  .compliance-grid {
    grid-template-columns: 1fr;
  }
}

.compliance-card {
  padding: var(--space-md);
  border-left: 4px solid var(--color-primary);
}

.compliance-card.success {
  border-left-color: var(--color-success);
}