/* ========================================
   IODJ Crypto - Marketing Website Styles
   ======================================== */

/* CSS Variables - Color System */
:root {
  /* Primary Color - Crypto Blue */
  --primary-color: #2563EB;
  --primary-dark: #1E40AF;
  --primary-light: #3B82F6;
  --primary-lighter: #DBEAFE;
  
  /* Text Colors */
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --text-light: #9CA3AF;
  --text-white: #FFFFFF;
  
  /* Background Colors */
  --bg-white: #FFFFFF;
  --bg-light: #F9FAFB;
  --bg-gray: #F3F4F6;
  --bg-dark: #111827;
  
  /* Border Colors */
  --border-light: #E5E7EB;
  --border-medium: #D1D5DB;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

/* ========================================
   Reset & Base Styles
   ======================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

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

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  margin-bottom: var(--spacing-sm);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.lead {
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

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

/* ========================================
   Header / Navigation
   ======================================== */

.header {
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

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

.nav-menu a {
  font-weight: 500;
  color: var(--text-primary);
  transition: color 0.3s ease;
}

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

.btn-primary {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--primary-color);
  color: var(--text-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--text-white);
}

.btn-secondary {
  display: inline-block;
  padding: 12px 24px;
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all 0.3s ease;
}

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
}

/* ========================================
   Footer
   ======================================== */

.footer {
  background-color: var(--bg-dark);
  color: var(--text-white);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.footer-brand {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
  color: var(--text-white);
  justify-content: center;
}

.footer-tagline {
  color: var(--text-light);
  margin-top: var(--spacing-sm);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.footer-links h4 {
  color: var(--text-white);
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
}

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

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--text-light);
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-light);
  font-size: 0.875rem;
}

/* ========================================
   Section Styles
   ======================================== */

.section {
  padding: var(--spacing-3xl) 0;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-lighter) 0%, var(--bg-white) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><path d="M0,400 Q300,200 600,400 T1200,400 L1200,0 L0,0 Z" fill="%23DBEAFE" opacity="0.3"/></svg>') no-repeat;
  background-size: cover;
  opacity: 0.5;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.hero-content .lead {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  color: var(--text-secondary);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* ========================================
   Feature Cards
   ======================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

.feature-card {
  background-color: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.feature-card h3 {
  margin-bottom: var(--spacing-sm);
}

/* ========================================
   Steps / Process
   ======================================== */

.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

.step-item {
  text-align: center;
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  background-color: var(--primary-color);
  color: var(--text-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto var(--spacing-md);
}

.step-item h3 {
  margin-bottom: var(--spacing-sm);
}

/* ========================================
   Testimonials
   ======================================== */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

.testimonial-card {
  background-color: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
}

.testimonial-quote {
  font-size: 3rem;
  color: var(--primary-lighter);
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  line-height: 1;
}

.testimonial-content {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.testimonial-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--bg-gray);
}

.testimonial-name {
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial-role {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: var(--text-white);
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.cta-section h2 {
  color: var(--text-white);
  margin-bottom: var(--spacing-md);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn-white {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--text-white);
  color: var(--primary-color);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ========================================
   Form Styles
   ======================================== */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.form-checkbox input {
  margin-top: 4px;
}

/* ========================================
   Download Section
   ======================================== */

.download-section {
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
  flex-wrap: wrap;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 16px 24px;
  background-color: var(--bg-dark);
  color: var(--text-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all 0.3s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.download-btn img {
  width: 24px;
  height: 24px;
}

.qr-code {
  margin: var(--spacing-xl) auto;
  width: 200px;
  height: 200px;
  background-color: var(--bg-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.qr-code img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    gap: var(--spacing-md);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .hero-image {
    order: -1;
  }
  
  .features-grid,
  .testimonials-grid,
  .steps-container {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .hero-buttons,
  .cta-buttons {
    flex-direction: column;
  }
  
  .btn-primary,
  .btn-secondary,
  .btn-white {
    width: 100%;
    text-align: center;
  }
}

/* ========================================
   Utility Classes
   ======================================== */

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.animate-fade-in {
  animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}