:root {
  --primary-color: #6c7cff;
  --primary-hover: #5a69e0;
  --bg-dark: #0f1220;
  --bg-container: #1a1d2e;
  --text-primary: #eaeaf0;
  --text-secondary: #b5b7d6;
  --text-muted: #9a9cc7;
  --border-color: #2a2d3e;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Arial, Helvetica, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
}


/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: 60px;
  padding: 40px 0;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.app-icon {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  box-shadow: 0 8px 24px rgba(108, 124, 255, 0.3);
  transition: transform 0.3s ease;
}

.app-icon:hover {
  transform: scale(1.05);
}

.hero h1 {
  font-size: 36px;
  margin: 0;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--primary-color), #8b9aff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 18px;
  margin: 0;
}

/* Features Section */
.features-section {
  background: var(--bg-container);
  padding: 40px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-top: 20px;
}

.features-image img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.features-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.features-list ul li {
  padding: 12px 0;
  font-size: 16px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

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

/* System Badges */
.systems-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
  justify-content: center;
}

.system-badge {
  display: inline-block;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--primary-color), #5a69e0);
  color: white;
  border-radius: 8px;
  font-weight: bold;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(108, 124, 255, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.system-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(108, 124, 255, 0.4);
}

/* Screenshots Gallery */
.screenshots-section {
  margin-bottom: 40px;
}

.screenshots-grid {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.screenshot-item {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.screenshot-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.screenshot-item img {
  height: 180px;
  width: auto;
  max-width: 100%;
  display: block;
  transition: transform 0.3s ease;
}

.screenshot-item:hover img {
  transform: scale(1.05);
}

/* Download CTA Section */
.download-cta {
  text-align: center;
  background: linear-gradient(135deg, rgba(108, 124, 255, 0.1), rgba(90, 105, 224, 0.1));
  padding: 60px 40px;
  border-radius: 16px;
  margin: 60px 0 40px 0;
  border: 1px solid var(--border-color);
}

.download-cta h2 {
  font-size: 32px;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.download-cta p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

/* Navigation */
.nav {
  background: var(--bg-container);
  padding: 15px 0;
  margin-bottom: 30px;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

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

.nav a:hover,
.nav a.active {
  color: var(--primary-color);
}

/* Content Sections */
.section {
  margin-bottom: 32px;
}

.section h2 {
  font-size: 22px;
  margin-bottom: 12px;
  color: #ffffff;
}

.content-box {
  background: var(--bg-container);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.content-box h1 {
  color: var(--primary-color);
  font-size: 28px;
  margin-bottom: 20px;
  text-align: center;
}

.content-box h2 {
  color: var(--primary-color);
  font-size: 20px;
  margin-top: 30px;
  margin-bottom: 15px;
}

.content-box p {
  margin-bottom: 15px;
  color: var(--text-secondary);
}

/* Lists */
ul {
  padding-left: 20px;
}

ul li {
  margin-bottom: 8px;
  color: var(--text-secondary);
}

/* Notice Box */
.notice {
  background-color: rgba(255, 153, 0, 0.1);
  border-left: 4px solid #ff9900;
  padding: 15px 20px;
  margin: 20px 0;
  border-radius: 4px;
  color: var(--text-primary);
}

.notice strong {
  color: #ff9900;
}

/* Download Button */
.download {
  text-align: center;
  margin-top: 40px;
}

.download a {
  display: inline-block;
  padding: 0;
  background: transparent;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: transform 0.2s ease, opacity 0.3s ease;
}

.download a img {
  height: 60px;
  width: auto;
  display: block;
  transition: transform 0.2s ease;
}

.download a:hover {
  transform: translateY(-3px);
  opacity: 0.9;
}

.download a:hover img {
  transform: scale(1.05);
}

/* Footer */
footer {
  text-align: center;
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-muted);
}

footer a {
  color: var(--primary-color);
  text-decoration: none;
  margin: 0 10px;
  transition: color 0.3s ease;
}

footer a:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 600px) {
  .container {
    padding: 20px 15px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-description {
    font-size: 16px;
  }

  .app-icon {
    width: 100px;
    height: 100px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .features-section {
    padding: 30px 20px;
  }

  .screenshots-grid {
    flex-direction: column;
    align-items: center;
  }

  .screenshot-item img {
    width: 100%;
    height: auto;
  }

  .download-cta {
    padding: 40px 20px;
  }

  .download-cta h2 {
    font-size: 24px;
  }

  .download-cta p {
    font-size: 16px;
  }

  .content-box {
    padding: 20px;
  }

  .content-box h1 {
    font-size: 22px;
  }

  .content-box h2 {
    font-size: 18px;
  }

  .nav ul {
    gap: 15px;
  }

  .system-badge {
    padding: 10px 20px;
    font-size: 13px;
  }
}