:root {
  --bg: linear-gradient(135deg, #0f0f17 0%, #1a1a2e 50%, #16213e 100%);
  --card-bg: rgba(255, 255, 255, 0.08);
  --card-hover: rgba(255, 255, 255, 0.12);
  --card-border: rgba(255, 255, 255, 0.1);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.75);
  --text-muted: rgba(255, 255, 255, 0.5);
  --accent: #00d4ff;
  --accent-hover: #00b8ff;
  --accent-glow: rgba(0, 212, 255, 0.3);
  --danger: #ff4060;
  --success: #00ff9d;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
  --radius: 18px;
  --radius-sm: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.light-theme {
  --bg: linear-gradient(135deg, #f5f9ff 0%, #e8f0fe 50%, #dde5f0 100%);
  --card-bg: rgba(255, 255, 255, 0.9);
  --card-hover: rgba(255, 255, 255, 1);
  --card-border: rgba(0, 0, 0, 0.1);
  --text-primary: #1a2639;
  --text-secondary: #2c3e5c;
  --text-muted: #5a6b7e;
  --accent: #0066cc;
  --accent-hover: #004999;
  --accent-glow: rgba(0, 102, 204, 0.2);
  --danger: #dc3545;
  --success: #28a745;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.05);
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}


.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.hero-content {
  max-width: 800px;
}

.hero-logo {
  width: 120px;
  height: 120px;
  margin-bottom: 24px;
  border-radius: 24px;
  box-shadow: var(--shadow);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent), #a0f1ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--card-hover);
  transform: translateY(-2px);
}


section {
  padding: 80px 0;
}

.alt-bg {
  background: rgba(0, 0, 0, 0.2);
}

body.light-theme .alt-bg {
  background: rgba(0, 0, 0, 0.02);
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent), #a0f1ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 48px;
}


.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 40px var(--accent-glow);
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 48px;
  height: 48px;
  stroke: var(--accent);
  transition: var(--transition);
}

.feature-card:hover .feature-icon svg {
  transform: scale(1.1);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
}


.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.demo-grid.reverse {
  direction: rtl;
}

.demo-grid.reverse .demo-features {
  direction: ltr;
}

.demo-image {
  text-align: center;
}

.screenshot {
  max-width: 100%;
  max-height: fit-content;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--card-border);
  transition: var(--transition);
}

.screenshot:hover {
  transform: scale(1.02);
  box-shadow: 0 16px 48px var(--accent-glow);
}

.demo-caption {
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 14px;
}

.demo-features h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--accent);
}

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

.feature-list li {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.feature-marker {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  color: var(--accent);
}

.feature-marker svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

.feature-list li strong {
  display: block;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.feature-list li p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
}


.actions-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.action-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.action-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.action-screenshot {
  width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  border: 1px solid var(--card-border);
}

.action-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.action-icon svg {
  width: 48px;
  height: 48px;
  stroke: var(--accent);
}

.action-item h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.action-item p {
  color: var(--text-secondary);
  font-size: 14px;
}


.import-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.import-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.import-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.import-screenshot {
  width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  border: 1px solid var(--card-border);
}

.import-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.import-icon svg {
  width: 64px;
  height: 64px;
  stroke: var(--accent);
}

.import-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.import-card p {
  color: var(--text-secondary);
  font-size: 14px;
}


.folder-badge {
  display: inline-block;
  padding: 2px 8px;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  margin-left: 8px;
}

/* Footer */
.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--card-border);
  padding: 48px 0;
  margin-top: 40px;
}

.footer-content {
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

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

.footer-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 24px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-copyright {
  color: var(--text-muted);
  font-size: 14px;
}


.theme-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  cursor: pointer;
  z-index: 1000;
  backdrop-filter: blur(10px);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.1) rotate(30deg);
}

.theme-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}


.drag-indicator {
  position: fixed;
  background: var(--accent);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  pointer-events: none;
  z-index: 10000;
  box-shadow: var(--shadow);
  animation: dragPulse 1s infinite;
}

@keyframes dragPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}


.modal-preview {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 20px;
}

.modal-field {
  margin-bottom: 16px;
}

.modal-field label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.modal-field input,
.modal-field select {
  width: 100%;
  padding: 12px 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  transition: var(--transition);
}

.modal-field input:focus,
.modal-field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.modal-buttons {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.modal-btn {
  flex: 1;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.modal-btn.cancel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
}

.modal-btn.save {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
}

.modal-btn.save:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.modal-btn.cancel:hover {
  background: var(--card-hover);
}


.folder-tree-preview {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
}

.folder-item {
  display: flex;
  align-items: center;
  padding: 10px;
  margin: 4px 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.folder-item:hover {
  background: var(--card-hover);
  transform: translateX(4px);
}

.folder-item .folder-icon {
  margin-right: 10px;
  color: #FFD700;
}

.folder-item .folder-name {
  flex: 1;
  font-weight: 500;
}

.folder-item .folder-count {
  background: var(--accent-glow);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.folder-children {
  margin-left: 30px;
  padding-left: 10px;
  border-left: 2px solid var(--card-border);
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .section-title {
    font-size: 28px;
  }

  .demo-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .demo-grid.reverse {
    direction: ltr;
  }

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

  .actions-showcase {
    grid-template-columns: 1fr;
  }

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


  .footer-links {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .feature-list li {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

section {
  animation: fadeIn 0.6s ease forwards;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--card-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-hover);
}

/* FAQ Section */
.faq-section {
  padding: 80px 0;
  background: var(--card-bg);
}


.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin: 40px 0;
    align-items: start;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.faq-question {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--accent);
}

.faq-icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

.faq-question h3 {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-toggle {
  font-size: 24px;
  color: var(--text-secondary);
  transition: transform 0.3s ease;
  width: 24px;
  text-align: center;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 20px 0 76px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

.faq-answer ul,
.faq-answer ol {
  margin: 10px 0;
  padding-left: 20px;
}

.faq-answer li {
  margin-bottom: 6px;
}

.faq-contact {
  text-align: center;
  margin-top: 48px;
  padding: 32px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
}

.faq-contact h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.faq-contact p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.faq-contact-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text-primary);
}

.contact-btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  color: var(--accent);
}

.contact-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}

.email-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.github-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

@media (max-width: 768px) {
  .faq-grid {
    grid-template-columns: 1fr;
  }
  
  .faq-answer {
    padding: 0 16px 0 60px;
  }
  
  .faq-contact-buttons {
    flex-direction: column;
  }
  
  .contact-btn {
    width: 100%;
    justify-content: center;
  }

}