/* Variables */
:root {
  --primary: #1f3a5f;
  --primary-light: #2a4e80;
  --primary-dark: #14232E;
  --accent: #56CADA;
  --accent-dark: #458C99;
  --text: #333333;
  --text-light: #666666;
  --background: #f9fafb;
  --white: #ffffff;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --success: #10b981;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  --radius-sm: 0.25rem;
  --radius: 0.5rem;
  --radius-lg: 1rem;
  
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--background);
  min-height: 100vh;
  overflow-x: hidden;
}

img, video, iframe {
  max-width: 100%;
}

a {
  color: var(--accent-dark);
  text-decoration: none;
  transition: var(--transition);
}

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

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

p {
  margin-bottom: 1.5rem;
}

ul, ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  gap: 0.5rem;
}

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

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

.btn-secondary {
  background-color: var(--gray-200);
  color: var(--primary-dark);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--gray-300);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-accent {
  background-color: var(--accent);
  color: var(--primary-dark);
  box-shadow: var(--shadow-sm);
}

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

/* Header */
.header {
  background-color: var(--primary-dark);
  color: var(--white);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo h1 {
  font-size: 1.5rem;
  margin-bottom: 0;
  color: var(--white);
}

.logo svg {
  color: var(--accent);
  width: 24px;
  height: 24px;
}

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

/* Sections */
section {
  padding: 5rem 0;
}

section h2 {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2.5rem;
  position: relative;
  display: inline-block;
  width: 100%;
}

section h2:after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--accent);
  margin: 1rem auto 0;
  border-radius: var(--radius-sm);
}

.section-intro {
  text-align: center;
  max-width: 800px;
  margin: -2rem auto 3rem;
  font-size: 1.125rem;
  color: var(--text-light);
}

/* Hero Section */
.hero {
  padding: 5rem 0;
  background: linear-gradient(135deg, rgba(20, 35, 46, 0.05) 0%, rgba(69, 140, 153, 0.1) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.hero-content h2 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  text-align: left;
}

.hero-content h2:after {
  margin: 1rem 0 0;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
}

.features-list {
  margin-bottom: 2rem;
  list-style: none;
  padding: 0;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  font-size: 1.125rem;
}

.features-list svg {
  color: var(--success);
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-caption {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
  color: var(--text-light);
  font-size: 1rem;
}

.video-caption svg {
  color: var(--accent);
  width: 24px;
  height: 24px;
}

/* Stats Section */
.stats {
  background-color: var(--primary-dark);
  padding: 4rem 0;
  margin: 3rem 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  color: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.stat-card {
  text-align: center;
  padding: 2rem;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-5px);
  background-color: rgba(255, 255, 255, 0.1);
}

.stat-value {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.stat-label {
  font-size: 1.125rem;
  opacity: 0.9;
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2.5rem;
}

.feature-card {
  background-color: var(--white);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 4px solid transparent;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--accent);
}

.feature-icon {
  margin-bottom: 1.5rem;
  width: 64px;
  height: 64px;
  background-color: var(--gray-100);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.feature-icon svg {
  color: var(--accent-dark);
  width: 32px;
  height: 32px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background-color: var(--accent);
}

.feature-card:hover .feature-icon svg {
  color: var(--white);
  transform: rotate(10deg);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.feature-card p {
  color: var(--text-light);
  margin-bottom: 0;
}

/* Examples Section */
.tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.tab {
  padding: 0.75rem 1.5rem;
  background-color: var(--gray-100);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1rem;
  color: var(--primary-dark);
}

.tab:hover {
  background-color: var(--gray-200);
  transform: translateY(-2px);
}

.tab.active {
  background-color: var(--accent-dark);
  color: var(--white);
  box-shadow: var(--shadow);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.tab-pane h3 {
  font-size: 1.75rem;
  margin: 0 0 1.5rem;
  text-align: center;
  color: var(--primary);
}

.iframe-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  margin-bottom: 1.5rem;
}

.iframe-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.tab-pane p {
  max-width: 800px;
  margin: 1.5rem auto;
  text-align: center;
  color: var(--text-light);
}

/* CTA Section */
.cta {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--accent-dark) 100%);
  color: var(--white);
  padding: 5rem 0;
  margin: 4rem 0;
  border-radius: var(--radius-lg);
  text-align: center;
}

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

.cta h2 {
  color: var(--white);
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.cta h2:after {
  background: var(--white);
}

.cta p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
}

/* Footer */
.footer {
  background-color: var(--primary-dark);
  color: var(--white);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-info h3 {
  color: var(--white);
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.footer-info p {
  color: var(--gray-300);
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--gray-300);
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: var(--gray-300);
  font-size: 0.875rem;
}

/* Process Section */
.process {
  padding: 5rem 0;
  background-color: var(--gray-100);
}

.process h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.process-step {
  background-color: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
  transition: var(--transition);
}

.process-step:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.step-number {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  position: relative;
  box-shadow: var(--shadow);
}

.step-number-text {
  color: var(--white);
  font-size: 1.5rem;
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.process-step h3 {
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.process-step p {
  color: var(--text-light);
  margin-bottom: 0;
}

/* Explanation Content */
.explanation-content {
  max-width: 800px;
  margin: 0 auto 3rem;
  text-align: center;
}

.explanation-content h3 {
  color: var(--primary-dark);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.explanation-content p {
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.explanation-content p:last-child {
  margin-bottom: 0;
}

.explanation-content strong {
  color: var(--primary-dark);
}

/* Media Queries */
@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  
  .footer-content {
    grid-template-columns: 2fr 1fr;
    align-items: center;
  }
  
  .footer-info {
    text-align: left;
  }
}

@media (max-width: 767px) {
  section {
    padding: 3rem 0;
  }
  
  .hero {
    padding: 3rem 0;
  }
  
  .hero-content h2 {
    font-size: 2rem;
  }
  
  .tabs {
    flex-direction: column;
  }
  
  .tab {
    width: 100%;
  }
  
  .footer-content {
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
}