:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --text: #1f2937;
  --background: #ffffff;
  --card: #f3f4f6;
  --border: #e5e7eb;
  --hover: #f9fafb;
  --code-bg: #f1f5f9;
}

[data-theme="dark"] {
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --text: #f3f4f6;
  --background: #111827;
  --card: #1f2937;
  --border: #374151;
  --hover: #1f2937;
  --code-bg: #1e293b;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  transition: background-color 0.3s, color 0.3s;
}

/* Header & Navigation */
header {
  background: var(--card);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  transition: background-color 0.2s;
}

nav a:hover {
  background: var(--hover);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: background-color 0.2s;
}

.theme-toggle:hover {
  background: var(--hover);
}

/* Main Content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Sections */
section {
  margin: 6rem 0;
  scroll-margin-top: 5rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0;
}

.logo {
  width: 120px;
  height: 120px;
  margin-bottom: 1rem;
  transition: transform 0.3s;
}

.logo:hover {
  transform: scale(1.05);
}

.badges {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1rem;
}

.badge {
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.feature {
  background: var(--card);
  padding: 2rem;
  border-radius: 12px;
  transition: transform 0.2s;
  border: 1px solid var(--border);
}

.feature:hover {
  transform: translateY(-4px);
}

/* Download Section */
.download-options {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.download-button {
  background: var(--primary);
  color: white;
  padding: 1rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
  position: relative;
}

.download-button:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.size {
  font-size: 0.875rem;
  opacity: 0.8;
}

/* Installation Steps */
.install-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.step {
  background: var(--card);
  padding: 2rem;
  border-radius: 12px;
  position: relative;
  border: 1px solid var(--border);
}

.step-number {
  position: absolute;
  top: -1rem;
  left: -1rem;
  background: var(--primary);
  color: white;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

/* Keyboard Shortcuts */
.shortcuts {
  background: var(--card);
  border-radius: 12px;
  padding: 2rem;
  margin-top: 2rem;
  border: 1px solid var(--border);
}

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

.shortcut {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem;
  border-radius: 6px;
}

.shortcut:hover {
  background: var(--hover);
}

.key {
  background: var(--code-bg);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.875rem;
}

/* FAQ Section */
.faq {
  margin-top: 2rem;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.faq-question {
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  margin-top: 1rem;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  margin-top: 6rem;
  padding-top: 3rem;
}

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

.footer-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-section a {
  color: var(--text);
  text-decoration: none;
  opacity: 0.8;
}

.footer-section a:hover {
  opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
  nav {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .download-options {
    flex-direction: column;
  }

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

  .install-steps {
    grid-template-columns: 1fr;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.feature,
.step,
.download-button {
  animation: fadeIn 0.5s ease-out;
}

.screenshot {
  width: 100%;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.screenshot-img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}