:root {
  /* Light Mode Colors */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-gradient: linear-gradient(135deg, #4facfe 0%, #667eea 100%);
  --text-gradient: linear-gradient(
    135deg,
    #667eea 0%,
    #764ba2 50%,
    #f093fb 100%
  );
  --bg-gradient: linear-gradient(
    135deg,
    #667eea 0%,
    #764ba2 25%,
    #f093fb 50%,
    #4facfe 75%,
    #00f2fe 100%
  );
  --bg-color: #f9f9f9;
  --surface-color: #ffffff;
  --text-primary: #000000;
  --text-secondary: #424242;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --bg-color: #0f0f23;
  --surface-color: #1a1a2e;
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --border-color: #2d3748;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: all 0.3s ease;
  min-height: 100vh;
  padding: 40px 60px;
}

[data-theme="dark"] body {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

[data-theme="light"] body {
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 50px;
  font-size: 18px;
}

.nav-back {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

[data-theme="light"] .nav-back {
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-back:hover {
  background: rgb(116, 116, 116);
  transform: translateY(-1px);
}

[data-theme="light"] .nav-back:hover {
  background: rgba(0, 0, 0, 0.1);
}

.nav-separator {
  color: #888;
}

.nav-item {
  color: var(--text-secondary);
}

.nav-current {
  color: var(--text-primary);
  font-weight: 500;
}

/* Main Content */
.main-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  margin-bottom: 60px;
}

.content-left h1 {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.1;
  color: var(--text-primary);
}

.title-underline {
  width: 150px;
  height: 4px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6);
  margin-bottom: 40px;
  border-radius: 2px;
}

.description {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 50px;
}

/* Stats */
.stats {
  display: flex;
  gap: 30px;
  margin-bottom: 40px;
}

.stat-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 20px 40px;
  display: flex;
  align-items: center;
  gap: 15px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

[data-theme="light"] .stat-card {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: var(--shadow-sm);
}

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

.stat-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 8px;
  width: 20px;
  height: 20px;
}

.stat-card i {
  font-size: 30px;
  font-weight: 700;
  color: white;
}

[data-theme="light"] .stat-card i {
  color: black;
}

.stat-content .stat-number {
  font-size: 25px;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-content .stat-label {
  font-size: 15px;
  color: var(--text-secondary);
}

/* Buttons */
.buttons {
  display: flex;
  gap: 20px;
  margin-bottom: 60px;
}

.btn {
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

[data-theme="light"] .btn-secondary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.btn-secondary:hover {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  transform: translateY(-2px);
}

[data-theme="light"] .btn-secondary:hover {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* Technologies */
.technologies {
  margin-bottom: 20px;
}

.section-title {
  font-size: 30px;
  font-weight: 600;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-right: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

[data-theme="light"] .tech-tag {
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.tech-tag:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Right side - Device mockups */
.content-right {
  margin-top: -300px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.device-mockups {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  align-items: center;
  gap: 80px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

[data-theme="light"] .device-mockups {
  background: rgba(0, 0, 0, 0.241);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: var(--shadow-lg);
}

.phone-mockup {
  width: 200px;
  height: 350px;
  background: #252525;
  border-radius: 25px;
  border: 1px solid #333;
  padding: 10px;
  position: relative;
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 15px;
  overflow: hidden;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.laptop-mockup {
  width: 300px;
  height: 190px;
  background: #333333;
  border-radius: 10px;
  padding: 10px;
  position: relative;
}

.laptop-screen {
  width: 100%;
  height: 100%;
  border-radius: 5px;
  font-family: "Courier New", monospace;
  overflow: hidden;
}

.laptop-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Key Features */
.features {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 40px;
  margin-top: 40px;
  margin-bottom: 60px;
  backdrop-filter: blur(10px);
}

[data-theme="light"] .features {
  background: rgba(229, 229, 229, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: var(--shadow-lg);
}

.features-title {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.feature-list {
  list-style: none;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 25px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-secondary);
}

[data-theme="dark"] .feature-bullet {
  width: 8px;
  height: 8px;
  background: #ffffff;
  border-radius: 50%;
  margin-top: 8px;
  flex-shrink: 0;
}

.feature-bullet {
  width: 8px;
  height: 8px;
  background: #000000;
  border-radius: 50%;
  margin-top: 8px;
  flex-shrink: 0;
}

/* Footer */
.footer {
  text-align: center;
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 18px;
  font-weight: 500;
}

[data-theme="light"] .footer {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

/* Icons */
.icon {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

/* Responsive */
@media (max-width: 768px) {
  .main-content {
    grid-template-columns: 1fr;
  }

  .content-left h1 {
    font-size: 2rem;
  }

  body {
    padding: 2rem 1rem;
  }

  .device-mockups {
    margin-top: 15rem;
    flex-direction: column;
    padding: 1.5rem;
  }

  .stats {
    display: flex;
  }

  .buttons {
    align-items: center;
    justify-content: center;
  }

  [data-theme="light"] .device-mockups {
    background: rgba(0, 0, 0, 0.044);
  }

  .phone-mockup {
    width: 12rem;
    height: 21rem;
  }

  .laptop-mockup {
    width: 18rem;
    height: 11rem;
  }

  .features {
    padding: 2rem;
  }

  [data-theme="light"] .features {
    background: rgba(0, 0, 0, 0.044);
  }

  .description {
    font-size: 1rem;
  }

  .stat-card {
    padding: 1rem 1rem;
  }
  .nav-current {
    font-size: 0.8rem;
  }

  .feature-item {
    font-size: 0.7rem;
  }

  .footer {
    font-size: 0.8rem;
  }
}