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

:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --success: #10b981;
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --radius: 12px;
  --radius-sm: 8px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  color: var(--text);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* Hero Section */
.hero {
  text-align: center;
  padding: 60px 20px;
  background: var(--bg);
  border-radius: var(--radius);
  margin-bottom: 30px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.logo-large {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  margin: 0 auto 20px;
}

.hero h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.subtitle {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 15px;
}

.version-badge {
  display: inline-block;
  background: var(--bg-secondary);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

/* Sections */
.section {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 30px;
  margin-bottom: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.section h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}

/* Quick Start Grid */
.quick-start-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.step-card {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--radius-sm);
  position: relative;
}

.step-number {
  position: absolute;
  top: -10px;
  left: 20px;
  width: 30px;
  height: 30px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.step-card h3 {
  font-size: 16px;
  margin-top: 10px;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 13px;
  color: var(--text-muted);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
}

.feature-card {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--radius-sm);
  text-align: center;
}

.feature-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.feature-card h3 {
  font-size: 14px;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 12px;
  color: var(--text-muted);
}

/* Shortcuts Table */
.shortcuts-table {
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.shortcut-row {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.shortcut-row:last-child {
  border-bottom: none;
}

.shortcut-row kbd {
  padding: 6px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: monospace;
  font-size: 12px;
  margin-right: 16px;
  min-width: 140px;
  text-align: center;
}

.shortcut-row span {
  font-size: 13px;
}

/* Options List */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.option-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 15px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
}

.option-badge {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.option-info strong {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
}

.option-info p {
  font-size: 12px;
  color: var(--text-muted);
}

/* Tips List */
.tips-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tip-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
}

.tip-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.tip-item p {
  font-size: 13px;
  margin: 0;
}

.tip-item strong {
  color: var(--primary);
}

/* Support Cards */
.support-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
}

.support-card {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--radius-sm);
  text-align: center;
}

.support-card h3 {
  font-size: 14px;
  margin-bottom: 8px;
}

.support-card p {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.btn-link {
  color: var(--primary);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
}

.btn-link:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  text-align: center;
  padding: 30px 20px;
  color: white;
}

.footer-content p {
  margin-bottom: 10px;
  opacity: 0.9;
}

.footer-links {
  margin-top: 15px;
}

.footer-links a {
  color: white;
  text-decoration: none;
  margin: 0 10px;
  font-size: 13px;
  opacity: 0.9;
}

.footer-links a:hover {
  opacity: 1;
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 24px;
  }
  
  .quick-start-grid,
  .features-grid,
  .support-cards {
    grid-template-columns: 1fr;
  }
  
  .shortcut-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  
  .shortcut-row kbd {
    width: 100%;
  }
}