/* CSS Variables */
:root {
  --color-gray: #4d4d4d;
  --color-white: #ffffff;
  --color-red: #fb4222;
  --color-dark: #1a1a1a;
  --color-light-gray: #f5f5f5;
  --color-border: #e0e0e0;
  --transition: all 0.3s ease;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* 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;
  color: var(--color-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  padding: 1rem 0;
}

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

.logo img {
  height: 40px;
  transition: var(--transition);
}

.logo img:hover {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-gray);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--color-red);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-gray);
  border-radius: 2px;
  transition: var(--transition);
}

/* Language Switcher */
.language-switcher {
  display: flex;
  gap: 4px;
  background: var(--color-light-gray);
  border-radius: 8px;
  padding: 4px;
}

.lang-btn {
  padding: 6px 12px;
  border: none;
  background: transparent;
  color: var(--color-gray);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  transition: var(--transition);
}

.lang-btn:hover {
  background: rgba(251, 66, 34, 0.1);
  color: var(--color-red);
}

.lang-btn.active {
  background: var(--color-red);
  color: var(--color-white);
}

/* Buttons */
.btn {
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

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

.btn-primary:hover {
  background: #e33b1d;
  border-color: #e33b1d;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-gray);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-red);
  color: var(--color-red);
}

.btn-outline-light {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-outline-light:hover {
  background: var(--color-white);
  color: var(--color-red);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 18px;
}

.btn-full {
  width: 100%;
}

/* Hero Section */
.hero {
  margin-top: 80px;
  padding: 100px 0 120px;
  background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  color: var(--color-dark);
}

.hero-text p {
  font-size: 20px;
  color: var(--color-gray);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-red);
}

.stat-label {
  font-size: 14px;
  color: var(--color-gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-illustration {
  animation: float 6s ease-in-out infinite;
}

.hero-illustration img {
  width: 100%;
  height: auto;
  max-width: 500px;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: var(--color-white);
  clip-path: polygon(0 60%, 100% 20%, 100% 100%, 0 100%);
  z-index: 0;
}

/* Features Section */
.features {
  padding: 100px 0;
  background: var(--color-white);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-dark);
}

.section-header p {
  font-size: 20px;
  color: var(--color-gray);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 40px;
}

.feature-card {
  padding: 40px;
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: 16px;
  transition: var(--transition);
  text-align: center;
}

.feature-card:hover {
  border-color: var(--color-red);
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.feature-illustration {
  margin-bottom: 24px;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-illustration img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: var(--transition);
}

.feature-card:hover .feature-illustration img {
  transform: scale(1.05);
}

.feature-card h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-dark);
}

.feature-card p {
  color: var(--color-gray);
  line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
  padding: 100px 0;
  background: var(--color-light-gray);
}

.steps-container {
  max-width: 900px;
  margin: 0 auto;
}

.step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.step:last-child {
  margin-bottom: 0;
}

.step-reverse {
  direction: rtl;
}

.step-reverse > * {
  direction: ltr;
}

.step-illustration {
  position: relative;
}

.step-illustration img {
  width: 100%;
  height: auto;
  max-width: 400px;
}

.step-content {
  position: relative;
}

.step-number {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-red);
  opacity: 0.2;
  position: absolute;
  top: -40px;
  left: 0;
  z-index: 0;
}

.step-content h3 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-dark);
  position: relative;
  z-index: 1;
}

.step-content p {
  font-size: 18px;
  color: var(--color-gray);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* Demo Section */
.demo {
  padding: 100px 0;
  background: var(--color-white);
}

.demo-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.demo-text h2 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--color-dark);
}

.demo-text p {
  font-size: 18px;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 32px;
}

.demo-features {
  list-style: none;
  margin-bottom: 32px;
}

.demo-features li {
  font-size: 18px;
  color: var(--color-gray);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.demo-features li:last-child {
  border-bottom: none;
}

.demo-illustration img {
  width: 100%;
  height: auto;
  max-width: 500px;
  animation: float 6s ease-in-out infinite;
}

/* Pricing Section */
.pricing {
  padding: 100px 0;
  background: var(--color-light-gray);
}

/* Pricing Calculator */
.pricing-calculator {
  background: var(--color-white);
  border-radius: 16px;
  padding: 32px;
  margin-top: 48px;
  box-shadow: var(--shadow-md);
  border: 2px solid var(--color-border);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.calculator-header {
  text-align: center;
  margin-bottom: 24px;
}

.calculator-header h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.calculator-header p {
  font-size: 16px;
  color: var(--color-gray);
}

.calculator-body {
  margin-bottom: 24px;
}

.calculator-body label {
  display: block;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 16px;
}

.slider-container {
  position: relative;
  margin-bottom: 32px;
}

#lessonSlider {
  width: 100%;
  height: 8px;
  border-radius: 5px;
  background: var(--color-border);
  outline: none;
  -webkit-appearance: none;
}

#lessonSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-red);
  cursor: pointer;
  transition: var(--transition);
}

#lessonSlider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 0 8px rgba(251, 66, 34, 0.1);
}

#lessonSlider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-red);
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

#lessonSlider::-moz-range-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 0 8px rgba(251, 66, 34, 0.1);
}

.slider-value {
  text-align: center;
  margin-top: 12px;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-red);
}

.lesson-price-input {
  max-width: 300px;
  margin: 0 auto;
}

.lesson-price-input label {
  font-size: 16px;
  margin-bottom: 8px;
}

.lesson-price-input input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-size: 18px;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
}

.lesson-price-input input:focus {
  outline: none;
  border-color: var(--color-red);
}

.calculator-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  position: relative;
}

.result-card {
  background: var(--color-light-gray);
  padding: 24px;
  border-radius: 12px;
  text-align: center;
  transition: var(--transition);
}

.result-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.result-pro {
  background: linear-gradient(135deg, var(--color-red) 0%, #e33b1d 100%);
  color: var(--color-white);
}

.result-plan {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
}

.result-cost {
  margin-bottom: 12px;
}

.result-label {
  display: block;
  font-size: 14px;
  opacity: 0.8;
  margin-bottom: 8px;
}

.result-amount {
  display: block;
  font-size: 32px;
  font-weight: 700;
}

.result-detail {
  font-size: 14px;
  opacity: 0.8;
}

.result-savings {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: var(--color-white);
  padding: 16px;
  border-radius: 12px;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.savings-icon {
  font-size: 24px;
}

.savings-amount {
  font-size: 24px;
}

/* Pricing Cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto 48px;
}

@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
  }
}

.pricing-card {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: 16px;
  padding: 40px;
  position: relative;
  transition: var(--transition);
}

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

.pricing-card.featured {
  border-color: var(--color-red);
  border-width: 3px;
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.08) translateY(-8px);
}

.pricing-card .badge {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-red);
  color: var(--color-white);
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
}

.plan-name {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-dark);
}

.plan-price {
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.currency {
  font-size: 24px;
  color: var(--color-gray);
  order: 2;
}

.amount {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-dark);
  order: 1;
}

.period {
  font-size: 18px;
  color: var(--color-gray);
  order: 3;
}

.plan-commission {
  font-size: 16px;
  color: var(--color-red);
  font-weight: 600;
  margin-bottom: 32px;
  text-align: center;
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
}

.plan-features li {
  padding: 12px 0;
  color: var(--color-gray);
  border-bottom: 1px solid var(--color-border);
  line-height: 1.5;
}

.plan-features li:last-child {
  border-bottom: none;
}

.plan-note {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-gray);
  font-style: italic;
}

/* Why Us Section */
.why-us {
  padding: 100px 0;
  background: var(--color-white);
}

.trust-builders {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-top: 60px;
}

.trust-card {
  background: var(--color-light-gray);
  padding: 40px;
  border-radius: 16px;
  text-align: center;
  transition: var(--transition);
  border: 2px solid transparent;
}

.trust-card:hover {
  border-color: var(--color-red);
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  background: var(--color-white);
}

.trust-icon {
  font-size: 64px;
  margin-bottom: 24px;
  display: block;
}

.trust-illustration {
  height: 180px;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.trust-illustration img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.trust-card h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-dark);
}

.trust-card p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-gray);
  text-align: left;
}

/* CTA Section */
.cta-section {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--color-red) 0%, #e33b1d 100%);
  color: var(--color-white);
}

.cta-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: center;
}

.cta-illustration img {
  width: 100%;
  height: auto;
  max-width: 400px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.cta-content {
  text-align: left;
}

.cta-content h2 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 20px;
  margin-bottom: 32px;
  opacity: 0.9;
}

/* Footer */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: 60px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand img {
  height: 40px;
  margin-bottom: 16px;
  filter: brightness(0) invert(1);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-column h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-column a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  margin-bottom: 12px;
  transition: var(--transition);
}

.footer-column a:hover {
  color: var(--color-red);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--color-white);
  border-radius: 16px;
  padding: 40px;
  max-width: 600px;
  width: 100%;
  position: relative;
  animation: slideUp 0.3s ease;
  max-height: 90vh;
  overflow-y: auto;
}

@keyframes slideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  font-size: 32px;
  color: var(--color-gray);
  cursor: pointer;
  transition: var(--transition);
  z-index: 10;
}

.modal-close:hover {
  color: var(--color-red);
}

.modal-illustration {
  text-align: center;
  margin-bottom: 24px;
}

.modal-illustration img {
  width: 100%;
  max-width: 250px;
  height: auto;
}

.modal-content h2 {
  font-size: 28px;
  margin-bottom: 12px;
  color: var(--color-dark);
  text-align: center;
}

.modal-subtitle {
  text-align: center;
  color: var(--color-gray);
  margin-bottom: 32px;
  font-size: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-size: 16px;
  transition: var(--transition);
}

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

/* Toast */
.toast {
  position: fixed;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-dark);
  color: var(--color-white);
  padding: 16px 32px;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 3000;
  transition: var(--transition);
}

.toast.active {
  bottom: 40px;
}

/* Responsive Design */
@media (max-width: 968px) {
  .hero-content,
  .demo-content,
  .cta-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-text h1,
  .cta-content h2 {
    font-size: 36px;
  }

  .hero-text p {
    font-size: 18px;
  }

  .hero-illustration,
  .demo-illustration,
  .cta-illustration {
    text-align: center;
  }

  .hero-illustration img,
  .demo-illustration img,
  .cta-illustration img {
    max-width: 350px;
  }

  .step {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .step-reverse {
    direction: ltr;
  }

  .step-illustration img {
    max-width: 300px;
    margin: 0 auto;
    display: block;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .calculator-results {
    grid-template-columns: 1fr;
  }

  .pricing-calculator {
    padding: 24px 16px;
  }

  .calculator-header h3 {
    font-size: 20px;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  .trust-builders {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .language-switcher {
    width: 100%;
    justify-content: center;
    margin: 10px 0;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 24px;
  }

  .section-header h2 {
    font-size: 32px;
  }

  .demo-text h2,
  .cta-content h2 {
    font-size: 32px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .feature-illustration {
    height: 150px;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .modal-content {
    padding: 32px 24px;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 28px;
  }

  .hero-text p {
    font-size: 16px;
  }

  .stat-number {
    font-size: 28px;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .step-number {
    font-size: 56px;
  }

  .step-content h3 {
    font-size: 24px;
  }
}