:root {
  /* Colors */
  --bg-primary: #FCFCFC;
  --bg-secondary: #FFFFFF;
  --text-primary: #1A1A1A;
  --text-secondary: #6B7280;
  --text-light: #9CA3AF;
  --border-color: #E5E7EB;
  --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #4853FF 0%, #5D7AF1 100%);
  --gradient-secondary: linear-gradient(135deg, #5D7AF1 0%, #7C8EF7 100%);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;
  
  /* Breakpoints */
  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;
  --bp-2xl: 1536px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: var(--font-size-base);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-8);
  }
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(252, 252, 252, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo span {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: var(--spacing-8);
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-menu a:hover {
  color: #4853FF;
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: 0.3s;
}

/* Hero Section */
.hero {
  padding: var(--spacing-24) 0 var(--spacing-20);
  background: var(--bg-secondary);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--spacing-16);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-6);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-8);
  line-height: 1.7;
}

.cta-button {
  background: var(--gradient-primary);
  color: white;
  border: none;
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-medium);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-large);
  background: var(--gradient-secondary);
}

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

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: var(--shadow-large);
  transition: transform 0.3s ease;
}

.hero-image img:hover {
  transform: scale(1.05);
}

/* QR Section */
.qr-section {
  padding: var(--spacing-20) 0;
  background: var(--bg-primary);
}

.qr-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  align-items: center;
  gap: var(--spacing-16);
}

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

.qr-image img {
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: var(--shadow-medium);
}

.qr-text h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-6);
  color: var(--text-primary);
}

.qr-text p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-6);
  line-height: 1.7;
}

/* Payment Places Section */
.payment-places {
  padding: var(--spacing-20) 0;
  background: var(--bg-secondary);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-16);
  color: var(--text-primary);
}

.slider {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 20px;
}

.slider-container {
  display: flex;
  transition: transform 0.5s ease;
  width: 400%;
}

.slide {
  width: 25%;
  flex-shrink: 0;
  padding: var(--spacing-8);
  background: var(--bg-primary);
  text-align: center;
  box-shadow: var(--shadow-medium);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.slide.active {
  opacity: 1;
}

.slide-image {
  margin-bottom: var(--spacing-6);
}

.slide-image img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 15px;
}

.slide h3 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-4);
  color: var(--text-primary);
}

.slide p {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: var(--font-size-base);
}

.slider-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  padding: 0 var(--spacing-4);
}

.slider-btn {
  background: var(--gradient-primary);
  color: white;
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  font-size: var(--font-size-xl);
  transition: all 0.3s ease;
  pointer-events: all;
  box-shadow: var(--shadow-medium);
  display: flex;
  align-items: center;
  justify-content: center;
}

.slider-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-large);
}

.slider-dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-3);
  margin-top: var(--spacing-8);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: all 0.3s ease;
}

.dot.active {
  background: var(--gradient-primary);
  width: 30px;
  border-radius: 6px;
}

/* FAQ Section */
.faq {
  padding: var(--spacing-20) 0;
  background: var(--bg-primary);
}

.accordion {
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  background: var(--bg-secondary);
  border-radius: 15px;
  margin-bottom: var(--spacing-4);
  box-shadow: var(--shadow-light);
  overflow: hidden;
  transition: all 0.3s ease;
}

.accordion-item:hover {
  box-shadow: var(--shadow-medium);
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-6);
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.accordion-header:hover {
  background-color: #f8f9fa;
}

.accordion-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.accordion-icon {
  font-size: var(--font-size-2xl);
  font-weight: 300;
  color: var(--text-secondary);
  transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
  transform: rotate(45deg);
  color: #4853FF;
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-item.active .accordion-content {
  max-height: 400px;
}

.accordion-content p {
  padding: 0 var(--spacing-6) var(--spacing-6);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: white;
  padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

.footer-section h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-4);
}

.footer-credits__rul {
  margin-top: 15px;
}

.footer-credits p {
  text-align: left;
}

.footer-credits p, .footer-section p {
  color: #9CA3AF;
  line-height: 1.6;
}

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

.footer-section ul li {
  margin-bottom: var(--spacing-2);
}

.footer-section ul li a {
  color: #9CA3AF;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section ul li a:hover {
  color: white;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-8);
  border-top: 1px solid #374151;
}

.footer-links {
  display: flex;
  width: 100%;
  justify-content: start;
  gap: var(--spacing-6);
}

.footer-links a {
  color: #9CA3AF;
  text-align: left;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: white;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
    text-align: center;
  }
  
  .qr-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
    text-align: center;
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

.footer-credits {
  margin-top: 20px;
  text-align: center;
}

.footer-credits p {
  font-size: 12px;
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .footer-links {
    display: block;
  }

  .footer-links a {
    display: block;
    margin-bottom: 15px;
  }
  .footer-links a:last-child {
    margin-bottom: 0;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(252, 252, 252, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 2rem;
    transition: left 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu li {
    margin: 1.5rem 0;
  }
  
  .nav-menu a {
    font-size: 1.25rem;
    font-weight: 600;
    padding: 1rem 2rem;
    border-radius: 8px;
    transition: all 0.3s ease;
  }
  
  .nav-menu a:hover {
    background: rgba(72, 83, 255, 0.1);
    color: #4853FF;
  }
  
  .hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
  }
  
  .hero {
    padding: var(--spacing-20) 0 var(--spacing-16);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-description {
    font-size: var(--font-size-base);
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .qr-text h2 {
    font-size: var(--font-size-3xl);
  }
  
  .slider-nav {
    display: none;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-4);
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .qr-text h2 {
    font-size: var(--font-size-2xl);
  }
  
  .slide {
    padding: var(--spacing-6);
  }
  
  .slide h3 {
    font-size: var(--font-size-xl);
  }
  
  .accordion-header {
    padding: var(--spacing-4);
  }
  
  .accordion-header h3 {
    font-size: var(--font-size-base);
  }
}

@media (max-width: 320px) {
  .hero-title {
    font-size: var(--font-size-xl);
  }
  
  .section-title {
    font-size: var(--font-size-xl);
  }
  
  .qr-text h2 {
    font-size: var(--font-size-xl);
  }
  
  .cta-button {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

/* Smooth transitions for interactive elements */
.slide, .accordion-item, .cta-button, .slider-btn, .dot {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Focus styles for accessibility */
.cta-button:focus,
.slider-btn:focus,
.accordion-header:focus {
  outline: 2px solid #4853FF;
  outline-offset: 2px;
}