@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --primary: #007AFF;
  --primary-hover: #0051D5;
  --accent: #5AC8FA;
  
  --text-primary: #1D1D1F;
  --text-secondary: #86868B;
  
  --bg: #FFFFFF;
  --surface: #F5F5F7;
  --border: rgba(0, 0, 0, 0.08);
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.12);
  
  --radius: 18px;
  --spacing: 8px;
  
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --spring: cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #F5F5F7;
    --text-secondary: #86868B;
    --bg: #000000;
    --surface: #1C1C1E;
    --border: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  font-size: 17px;
  line-height: 1.5;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 calc(var(--spacing) * 3);
}

h1, h2, h3 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
}

h1 {
  font-size: clamp(56px, 10vw, 96px);
  font-weight: 900;
}

h2 {
  font-size: clamp(40px, 7vw, 72px);
}

h3 {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 600;
}

p {
  font-size: 20px;
  line-height: 1.5;
  color: var(--text-secondary);
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  height: 64px;
  display: flex;
  align-items: center;
}

@media (prefers-color-scheme: dark) {
  header {
    background: rgba(0, 0, 0, 0.8);
  }
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing) * 1.5);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  transition: opacity 0.2s var(--ease);
  -webkit-tap-highlight-color: transparent;
}

.logo:active {
  opacity: 0.6;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.language-select {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  -webkit-tap-highlight-color: transparent;
  min-width: 44px;
  min-height: 44px;
}

.language-select:hover {
  border-color: var(--primary);
}

.language-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(64px + var(--spacing) * 10) calc(var(--spacing) * 3) calc(var(--spacing) * 10);
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 800px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translateX(-50%) scale(1); opacity: 0.5; }
  50% { transform: translateX(-50%) scale(1.2); opacity: 0.8; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--spacing) * 1);
  padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: calc(var(--spacing) * 4);
  animation: fadeIn 0.8s var(--ease);
}

.badge svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero h1 {
  margin-bottom: calc(var(--spacing) * 3);
  animation: fadeIn 0.8s 0.1s var(--ease) backwards;
}

.hero p {
  font-size: 24px;
  max-width: 600px;
  margin: 0 auto calc(var(--spacing) * 6);
  animation: fadeIn 0.8s 0.2s var(--ease) backwards;
}

.cta-group {
  display: flex;
  gap: calc(var(--spacing) * 2);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeIn 0.8s 0.3s var(--ease) backwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: calc(var(--spacing) * 1);
  padding: calc(var(--spacing) * 2) calc(var(--spacing) * 4);
  border-radius: 100px;
  font-size: 17px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s var(--spring);
  cursor: pointer;
  border: none;
  font-family: 'Inter', sans-serif;
  min-height: 56px;
  min-width: 200px;
  -webkit-tap-highlight-color: transparent;
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

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

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

.btn-primary:active {
  transform: translateY(0);
}

.section {
  padding: calc(var(--spacing) * 15) 0;
}

.section-header {
  text-align: center;
  margin-bottom: calc(var(--spacing) * 10);
}

.section-title {
  margin-bottom: calc(var(--spacing) * 2);
  font-weight: 800;
}

.section-title + p {
  font-size: 20px;
  color: var(--text-secondary);
}

.grid {
  display: grid;
  gap: calc(var(--spacing) * 2);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: calc(var(--spacing) * 5);
  transition: all 0.3s var(--spring);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
  min-height: 240px;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--spring);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 122, 255, 0.3);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:active {
  transform: translateY(-4px);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: calc(var(--spacing) * 3);
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.25);
  transition: transform 0.3s var(--spring);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-5deg);
}

.card-icon svg {
  width: 28px;
  height: 28px;
  stroke: white;
  stroke-width: 2;
  fill: none;
  flex-shrink: 0;
}

.card h3 {
  margin-bottom: calc(var(--spacing) * 2);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.card p {
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-secondary);
  font-weight: 400;
  margin-top: auto;
}

.steps {
  display: grid;
  gap: calc(var(--spacing) * 4);
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  position: relative;
}

.step {
  text-align: center;
}

.step-number {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 28px;
  font-weight: 800;
  margin: 0 auto calc(var(--spacing) * 3);
  box-shadow: var(--shadow-md);
}

.step h3 {
  margin-bottom: calc(var(--spacing) * 2);
  font-size: 20px;
}

.cta-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 2);
  padding: calc(var(--spacing) * 10) calc(var(--spacing) * 4);
  text-align: center;
  margin: calc(var(--spacing) * 10) 0;
}

.cta-section h2 {
  margin-bottom: calc(var(--spacing) * 3);
}

.cta-section p {
  font-size: 20px;
  margin-bottom: calc(var(--spacing) * 5);
}

footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: calc(var(--spacing) * 8) 0 calc(var(--spacing) * 6);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--spacing) * 4);
  text-align: center;
}

.footer-links {
  display: flex;
  gap: calc(var(--spacing) * 5);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s var(--ease);
  -webkit-tap-highlight-color: transparent;
  min-height: 44px;
  display: flex;
  align-items: center;
}

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

.copyright {
  font-size: 13px;
  color: var(--text-secondary);
}

.page-content {
  max-width: 800px;
  margin: calc(64px + var(--spacing) * 10) auto calc(var(--spacing) * 10);
  padding: 0 calc(var(--spacing) * 3);
}

.page-title {
  font-size: clamp(40px, 6vw, 64px);
  margin-bottom: calc(var(--spacing) * 6);
  text-align: center;
}

.content-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: calc(var(--spacing) * 5);
  margin-bottom: calc(var(--spacing) * 4);
}

.content-section h2 {
  font-size: 32px;
  margin-bottom: calc(var(--spacing) * 3);
}

.content-section h3 {
  font-size: 24px;
  margin-top: calc(var(--spacing) * 4);
  margin-bottom: calc(var(--spacing) * 2);
}

.content-section p,
.content-section li {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: calc(var(--spacing) * 2);
}

.content-section ul {
  padding-left: calc(var(--spacing) * 3);
  margin: calc(var(--spacing) * 3) 0;
}

.content-section strong {
  color: var(--text-primary);
  font-weight: 600;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) / 1.5);
  padding: calc(var(--spacing) * 4);
  margin-bottom: calc(var(--spacing) * 2);
  transition: all 0.2s var(--ease);
}

.faq-item:hover {
  border-color: var(--primary);
}

.faq-question {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: calc(var(--spacing) * 1.5);
  color: var(--text-primary);
}

.faq-answer {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .container {
    padding: 0 calc(var(--spacing) * 2);
  }
  
  h1 {
    font-size: 48px;
  }
  
  h2 {
    font-size: 36px;
  }
  
  .hero {
    min-height: auto;
    padding: calc(64px + var(--spacing) * 8) calc(var(--spacing) * 2) calc(var(--spacing) * 8);
  }
  
  .hero p {
    font-size: 20px;
  }
  
  .cta-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: calc(var(--spacing) * 2);
  }
  
  .card {
    min-height: 200px;
  }
  
  .steps {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: calc(var(--spacing) * 10) 0;
  }
  
  .section-header {
    margin-bottom: calc(var(--spacing) * 6);
  }
  
  .cta-section {
    padding: calc(var(--spacing) * 8) calc(var(--spacing) * 3);
  }
  
  .content-section {
    padding: calc(var(--spacing) * 4);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

[dir="rtl"] {
  direction: rtl;
}