:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #8b5cf6;
  --accent: #ec4899;
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --text: #111827;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --code-bg: #1e293b;
  --code-text: #e2e8f0;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
  --hero-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --nav-bg: rgba(255, 255, 255, 0.95);
  --footer-bg: #f9fafb;
  --card-bg: #ffffff;
  --card-hover-bg: #f9fafb;
  --quick-nav-bg: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
  --feature-summary-bg: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
  --feature-card-bg: linear-gradient(135deg, #ffffff 0%, #f9fafb 100%);
  --section-heading-bg: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  --install-subtitle-bg: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
}

[data-theme="dark"] {
  --primary: #818cf8;
  --primary-dark: #6366f1;
  --secondary: #a78bfa;
  --accent: #f472b6;
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --text: #f1f5f9;
  --text-light: #94a3b8;
  --border: #334155;
  --code-bg: #1e293b;
  --code-text: #e2e8f0;
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-lg: rgba(0, 0, 0, 0.4);
  --hero-gradient: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  --nav-bg: rgba(15, 23, 42, 0.95);
  --footer-bg: #0a0f1a;
  --card-bg: #1e293b;
  --card-hover-bg: #1e293b;
  --quick-nav-bg: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  --feature-summary-bg: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  --feature-card-bg: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  --section-heading-bg: linear-gradient(135deg, rgba(129, 140, 248, 0.15) 0%, rgba(167, 139, 250, 0.15) 100%);
  --install-subtitle-bg: linear-gradient(135deg, rgba(129, 140, 248, 0.15) 0%, rgba(167, 139, 250, 0.15) 100%);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo img {
  width: 40px;
  height: 40px;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-links .btn {
  background: var(--primary);
  color: white;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  transition: background 0.2s;
}

.nav-links .btn:hover {
  background: var(--primary-dark);
  color: white;
}

/* Theme Toggle */
.theme-toggle {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text);
  padding: 0.5rem;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  transition: all 0.2s;
  font-size: 1.2rem;
}

.theme-toggle:hover {
  background: var(--bg-alt);
  border-color: var(--primary);
  transform: scale(1.05);
}

/* Hero Section */
.hero {
  padding: 4rem 0;
  background: var(--hero-gradient);
  color: white;
  margin-bottom: 4rem;
  border-bottom: 1px solid var(--border);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-text {
  text-align: left;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  font-weight: 800;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Code Terminal Box */
.hero-code-box {
  display: flex;
  justify-content: center;
  align-items: center;
}

.code-terminal {
  background: #1e293b;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  width: 100%;
  max-width: 500px;
  animation: float 3s ease-in-out infinite;
}

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

.terminal-header {
  background: #0f172a;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid #334155;
}

.terminal-buttons {
  display: flex;
  gap: 0.5rem;
}

.terminal-btn {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.terminal-btn.red {
  background: #ef4444;
}

.terminal-btn.yellow {
  background: #f59e0b;
}

.terminal-btn.green {
  background: #10b981;
}

.terminal-title {
  color: #94a3b8;
  font-size: 0.875rem;
  font-family: 'Fira Code', 'Consolas', monospace;
}

.terminal-body {
  padding: 1.5rem;
  font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
  font-size: 0.9rem;
  line-height: 1.8;
  min-height: 200px;
}

.code-line {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.code-prompt {
  color: #10b981;
  font-weight: 600;
}

.code-command {
  color: #e2e8f0;
}

.code-output {
  color: #94a3b8;
  margin-left: 1.5rem;
}

.code-cursor {
  color: #6366f1;
  animation: blink 1s infinite;
  font-weight: bold;
}

@keyframes blink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}

.typing {
  display: inline-block;
  overflow: hidden;
  border-right: 2px solid #6366f1;
  white-space: nowrap;
  animation: typing 2s steps(15, end), blink-cursor 0.75s step-end infinite;
  max-width: 0;
  animation-fill-mode: forwards;
}

.typing-delay {
  display: inline-block;
  overflow: hidden;
  border-right: 2px solid #6366f1;
  white-space: nowrap;
  animation: typing 2s steps(25, end) 2.5s, blink-cursor 0.75s step-end infinite;
  max-width: 0;
  animation-fill-mode: forwards;
}

@keyframes typing {
  to {
    max-width: 100%;
  }
}

@keyframes blink-cursor {
  0%, 50% {
    border-color: #6366f1;
  }
  51%, 100% {
    border-color: transparent;
  }
}

@media (max-width: 968px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-text {
    text-align: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-code-box {
    order: -1;
  }
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: white;
  color: var(--primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: white;
  color: var(--primary);
}

/* Content Sections */
section {
  padding: 3rem 0;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 3rem;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px var(--shadow-lg);
  border-color: var(--primary);
  background: var(--card-hover-bg);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.card p {
  color: var(--text-light);
  margin-bottom: 1rem;
}

.card a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.card a:hover {
  text-decoration: underline;
}

/* Code Blocks */
pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
}

code {
  font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
  font-size: 0.9rem;
}

code:not(pre code) {
  background: var(--bg-alt);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  color: var(--primary);
  font-size: 0.9em;
  border: 1px solid var(--border);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px var(--shadow);
  border: 1px solid var(--border);
}

th {
  background: var(--primary);
  color: white;
  padding: 1rem;
  text-align: left;
  font-weight: 600;
}

td {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

tr:hover {
  background: var(--bg-alt);
}

/* Lists */
ul, ol {
  margin: 1rem 0;
  padding-left: 2rem;
}

li {
  margin: 0.5rem 0;
}

/* Links */
a {
  color: var(--primary);
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-dark);
}

/* Footer */
footer {
  background: var(--footer-bg);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  margin-top: 4rem;
}

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

.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--text);
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section a {
  color: #94a3b8;
  text-decoration: none;
  display: block;
  margin: 0.5rem 0;
}

.footer-section a:hover {
  color: var(--primary);
}

.footer-bottom {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: #64748b;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 600;
  background: var(--primary);
  color: white;
  margin: 0.25rem;
}

.badge-secondary {
  background: var(--secondary);
}

.badge-accent {
  background: var(--accent);
}

/* Feature List */
.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  padding: 1rem;
  margin: 0.5rem 0;
  background: var(--bg-alt);
  border-left: 4px solid var(--primary);
  border-radius: 4px;
  border: 1px solid var(--border);
  border-right: 1px solid var(--border);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.feature-list li::before {
  content: "✓";
  color: var(--primary);
  font-weight: bold;
  margin-right: 0.5rem;
}

/* Alert Boxes */
.alert {
  padding: 1rem 1.5rem;
  border-radius: 8px;
  margin: 1.5rem 0;
  border-left: 4px solid;
  border: 1px solid;
  border-right: none;
  border-top: none;
  border-bottom: none;
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: #3b82f6;
  color: var(--text);
}

[data-theme="dark"] .alert-info {
  color: #93c5fd;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: #f59e0b;
  color: var(--text);
}

[data-theme="dark"] .alert-warning {
  color: #fcd34d;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: #10b981;
  color: var(--text);
}

[data-theme="dark"] .alert-success {
  color: #6ee7b7;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .nav-links {
    flex-direction: column;
    gap: 1rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  table {
    font-size: 0.9rem;
  }
  
  th, td {
    padding: 0.5rem;
  }
}

/* Breadcrumbs */
.breadcrumbs {
  padding: 1rem 0;
  color: var(--text-light);
  font-size: 0.9rem;
}

.breadcrumbs a {
  color: var(--text-light);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--primary);
}

.breadcrumbs a:hover {
  color: var(--primary);
}

/* Quick Links */
.quick-links {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  margin: 2rem 0;
  border: 1px solid var(--border);
}

.quick-links h3 {
  margin-bottom: 1rem;
  color: var(--text);
}

.quick-links ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.5rem;
}

.quick-links a {
  display: block;
  padding: 0.5rem;
  text-decoration: none;
  color: var(--text);
  border-radius: 4px;
  transition: all 0.2s;
}

.quick-links a:hover {
  background: var(--bg-alt);
  color: var(--primary);
  padding-left: 1rem;
}

/* Quick Navigation */
.quick-navigation {
  background: var(--quick-nav-bg);
  padding: 3rem;
  border-radius: 16px;
  margin: 3rem 0;
  border: 2px solid var(--border);
  box-shadow: 0 4px 6px var(--shadow);
}

.quick-navigation h3 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--text);
  text-align: center;
}

.nav-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 2.5rem;
  font-size: 1.1rem;
}

.nav-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.nav-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.nav-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s ease;
}

.nav-card:hover::before {
  transform: scaleY(1);
}

.nav-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px var(--shadow-lg);
  border-color: var(--primary);
  background: var(--card-hover-bg);
}

.nav-icon {
  font-size: 2.5rem;
  line-height: 1;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
}

.nav-card:hover .nav-icon {
  transform: scale(1.15) rotate(5deg);
}

.nav-content {
  flex: 1;
  min-width: 0;
}

.nav-content h4 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
  color: var(--text);
  font-weight: 700;
}

.nav-content p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin: 0;
  line-height: 1.4;
}

.nav-arrow {
  font-size: 1.5rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.3s ease;
  opacity: 0.6;
}

.nav-card:hover .nav-arrow {
  transform: translateX(6px);
  opacity: 1;
}

@media (max-width: 768px) {
  .quick-navigation {
    padding: 2rem 1.5rem;
  }
  
  .nav-cards {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .nav-card {
    padding: 1.25rem;
  }
  
  .nav-icon {
    font-size: 2rem;
  }
}

/* Features Showcase */
.features-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.feature-card {
  background: var(--feature-card-bg);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px var(--shadow-lg);
  border-color: var(--primary);
}

.feature-icon {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  display: block;
  line-height: 1;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: var(--text);
  font-weight: 700;
}

.feature-card p {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  line-height: 1.7;
  font-size: 1rem;
}

.feature-highlights {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.feature-highlights li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text);
  font-size: 0.95rem;
}

.feature-highlights li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
  font-size: 1.1rem;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  margin-top: 1rem;
  transition: all 0.2s;
  padding: 0.5rem 0;
}

.feature-link:hover {
  color: var(--primary-dark);
  transform: translateX(4px);
}

.feature-link::after {
  content: '→';
  margin-left: 0.5rem;
  transition: transform 0.2s;
}

.feature-link:hover::after {
  transform: translateX(4px);
}

/* Features Summary */
.features-summary {
  margin-top: 4rem;
  padding: 2.5rem;
  background: var(--feature-summary-bg);
  border-radius: 16px;
  border: 1px solid var(--border);
}

.features-summary h3 {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--text);
  text-align: center;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.summary-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: all 0.2s;
}

.summary-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px var(--shadow);
  border-color: var(--primary);
}

.summary-icon {
  font-size: 2rem;
  flex-shrink: 0;
  line-height: 1;
}

.summary-item strong {
  display: block;
  color: var(--text);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.summary-item p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.5;
}

/* Responsive adjustments for features */
@media (max-width: 768px) {
  .features-showcase {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .feature-card {
    padding: 2rem;
  }
  
  .feature-icon {
    font-size: 3rem;
  }
  
  .summary-grid {
    grid-template-columns: 1fr;
  }
  
  .features-summary {
    padding: 1.5rem;
  }
}

/* Section Headings */
section[id] {
  margin-top: 0;
  padding-top: 0;
}

/* Reduce spacing in installation page sections */
section section {
  margin-top: 0;
  padding: 1rem 0;
}

main section section {
  padding: 0.5rem 0;
}

.section-heading {
  font-size: 2rem;
  font-weight: 800;
  margin: 0 0 1.5rem 0;
  padding: 2rem 2.5rem;
  margin-left: -2.5rem;
  margin-right: -2.5rem;
  background: var(--section-heading-bg);
  border-left: 5px solid;
  border-image: linear-gradient(180deg, var(--primary), var(--secondary)) 1;
  border-radius: 12px;
  position: relative;
  display: block;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text);
  overflow: hidden;
  text-shadow: 0 2px 4px var(--shadow);
  transition: all 0.3s ease;
}

.section-heading:hover {
  background: var(--section-heading-bg);
  opacity: 1.2;
  transform: translateX(4px);
  box-shadow: 0 4px 12px var(--shadow-lg);
}

.section-heading::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 12px 0 0 12px;
  box-shadow: 0 0 10px rgba(129, 140, 248, 0.6);
}

.section-heading::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 150px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(129, 140, 248, 0.2));
  pointer-events: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .section-heading {
    font-size: 1.75rem;
    padding: 1.5rem 1.5rem;
    margin-left: -1.5rem;
    margin-right: -1.5rem;
  }
}

/* Installation Page Subtitles */
.install-subtitle {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 1.5rem 0 1rem 0;
  padding: 1rem 1.5rem;
  margin-left: -1.5rem;
  margin-right: -1.5rem;
  background: var(--install-subtitle-bg);
  border-left: 4px solid var(--primary);
  border-radius: 8px;
  position: relative;
  display: inline-block;
  color: var(--text);
  overflow: hidden;
  transition: all 0.3s ease;
}

.install-subtitle::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 8px 0 0 8px;
}

.install-subtitle::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(129, 140, 248, 0.15));
  pointer-events: none;
}

.install-subtitle:hover {
  background: var(--install-subtitle-bg);
  opacity: 1.2;
  transform: translateX(3px);
  box-shadow: 0 4px 12px var(--shadow-lg);
}

.install-subtitle-h3 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 1.25rem 0 0.75rem 0;
  padding: 0.75rem 0;
  padding-left: 1.75rem;
  color: var(--primary);
  position: relative;
  display: block;
  transition: all 0.2s ease;
}

.install-subtitle-h3::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 1.2rem;
  transition: transform 0.2s ease;
  line-height: 1.5;
}

.install-subtitle-h3:hover {
  color: var(--primary-dark);
  transform: translateX(4px);
}

.install-subtitle-h3:hover::before {
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .install-subtitle {
    font-size: 1.5rem;
    padding: 0.875rem 1.25rem;
    margin-left: -1.25rem;
    margin-right: -1.25rem;
  }
  
  .install-subtitle-h3 {
    font-size: 1.2rem;
    padding: 0.625rem 0;
    padding-left: 1.5rem;
  }
  
  .install-subtitle-h3::before {
    left: 0;
  }
}