/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --background: #000000;
    --background-secondary: #111111;
    --background-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --accent-teal: #0ff;
    --accent-purple: #a29bfe;
    --accent-gold: #ffd700;
    --success: #00ff88;
    --warning: #ff9f43;
    --danger: #ff4757;
    --border-color: #333333;
    --card-background: #1e1e1e;
    --gradient-primary: linear-gradient(45deg, var(--accent-teal), var(--accent-purple));
    --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-small: 0 2px 10px rgba(0, 255, 255, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 255, 255, 0.15);
    --shadow-large: 0 8px 40px rgba(0, 255, 255, 0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    position: relative;
}

h2 i {
    color: var(--accent-teal);
    margin-right: 0.5rem;
}

h3 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

h4 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Header */
.header {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

.nav-brand .logo {
    height: 40px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 4rem;
    background: radial-gradient(circle at center, #1a1a1a 0%, #000000 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-cta {
    margin-top: 2rem;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-large);
}

/* Buttons */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: var(--background);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.cta-button.secondary {
    background: transparent;
    color: var(--accent-teal);
    border: 2px solid var(--accent-teal);
}

.cta-button.secondary:hover {
    background: var(--accent-teal);
    color: var(--background);
}

.cta-button.large {
    padding: 1.25rem 2.5rem;
    font-size: 1.2rem;
}

/* Table of Contents */
.toc-section {
    padding: 4rem 0;
    background: var(--background-secondary);
}

.toc-section h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.toc-item {
    background: var(--card-background);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.toc-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-teal);
}

.toc-item a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

.toc-item i {
    color: var(--accent-teal);
    font-size: 1.2rem;
    width: 20px;
}

/* Main Content */
.main-content {
    padding-top: 2rem;
}

.content-section {
    margin-bottom: 4rem;
}

.content-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

/* Highlight Boxes */
.highlight-box {
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid var(--accent-teal);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.highlight-box i {
    color: var(--accent-teal);
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

.warning-box {
    background: rgba(255, 159, 67, 0.1);
    border: 1px solid var(--warning);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.warning-box i {
    color: var(--warning);
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

/* Step Lists */
.step-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin: 2rem 0;
}

.step-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--background);
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h4 {
    margin-bottom: 0.5rem;
}

/* Configuration Grid */
.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.config-item {
    background: var(--background-tertiary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.config-item:hover {
    border-color: var(--accent-teal);
    transform: translateY(-2px);
}

.config-item i {
    font-size: 2rem;
    color: var(--accent-teal);
    margin-bottom: 1rem;
}

.config-item h4 {
    margin-bottom: 0.5rem;
}

/* Feature Cards */
.feature-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card.highlight {
    border-color: var(--accent-gold);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.05) 0%, var(--card-background) 100%);
}

.feature-card.highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gold);
}

.feature-header {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    color: var(--background);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-title {
    flex: 1;
}

.feature-title h3 {
    margin-bottom: 0.5rem;
}

.feature-title p {
    color: var(--text-muted);
    margin-bottom: 0;
}

/* Feature Steps */
.feature-steps {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0;
}

.feature-step {
    background: var(--background-tertiary);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-teal);
}

.pro-tip {
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid var(--accent-gold);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.pro-tip i {
    color: var(--accent-gold);
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

/* Keyboard Shortcuts */
.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.shortcut-item {
    background: var(--background-tertiary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-color);
}

kbd {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--accent-teal);
}

/* Flag Items */
.flag-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.flag-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.flag-item.success {
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.flag-item.warning {
    background: rgba(255, 159, 67, 0.1);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.flag-item.danger {
    background: rgba(255, 71, 87, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

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

.platform-category {
    background: var(--background-tertiary);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.platform-category.recommended {
    border-color: var(--accent-gold);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.05) 0%, var(--background-tertiary) 100%);
}

.platform-category h5 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.platform-category ul {
    list-style: none;
}

.platform-category li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.platform-category i {
    color: var(--accent-teal);
    width: 20px;
}

/* Strategy Grid */
.strategy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.strategy-item {
    background: var(--background-tertiary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.strategy-item i {
    color: var(--accent-teal);
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

.strategy-item strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.25rem;
}

.strategy-item span {
    color: var(--text-secondary);
}

/* Workflow Timeline */
.workflow-timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin: 2rem 0;
}

.workflow-step {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.step-time {
    background: var(--gradient-primary);
    color: var(--background);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    white-space: nowrap;
    min-width: 150px;
    text-align: center;
}

.step-content {
    flex: 1;
    background: var(--background-tertiary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.step-content ul {
    list-style: none;
}

.step-content li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.25rem 0;
    color: var(--text-secondary);
}

.step-content li::before {
    content: '▶';
    color: var(--accent-teal);
    font-size: 0.8rem;
}

/* Checklist */
.checklist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--background-tertiary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.checklist-item i {
    color: var(--success);
    font-size: 1.2rem;
}

/* Combination Items */
.combination-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0;
}

.combination-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.combination-item i {
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

.combination-item strong {
    display: block;
    margin-bottom: 0.25rem;
}

/* Troubleshooting */
.troubleshooting-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.trouble-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.trouble-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.trouble-header i {
    color: var(--warning);
    font-size: 1.5rem;
}

.trouble-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.trouble-solutions ul {
    list-style: none;
}

.trouble-solutions li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.trouble-solutions li::before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
}

/* Success Factors */
.factors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.factor-item {
    background: var(--background-tertiary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.factor-item i {
    color: var(--accent-gold);
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

.factor-item strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.25rem;
}

.factor-item span {
    color: var(--text-secondary);
}

/* Final CTA */
.final-cta {
    text-align: center;
    background: var(--background-tertiary);
    padding: 3rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-top: 2rem;
}

.final-cta h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.final-cta p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.footer-section p {
    color: var(--text-muted);
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

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

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .nav-links a {
        font-size: 0.9rem;
    }
    
    .toc-grid {
        grid-template-columns: 1fr;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .feature-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .feature-icon {
        align-self: flex-start;
    }
    
    .config-grid,
    .shortcuts-grid,
    .flag-grid,
    .platform-grid,
    .strategy-grid,
    .factors-grid {
        grid-template-columns: 1fr;
    }
    
    .workflow-step {
        flex-direction: column;
        gap: 1rem;
    }
    
    .step-time {
        min-width: auto;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .troubleshooting-grid {
        grid-template-columns: 1fr;
    }
    
    .combination-grid {
        gap: 0.75rem;
    }
    
    .combination-item {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .content-card {
        padding: 1rem;
    }
    
    .step-item {
        flex-direction: column;
        gap: 1rem;
    }
    
    .step-number {
        align-self: flex-start;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus States */
a:focus,
button:focus {
    outline: 2px solid var(--accent-teal);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: var(--accent-teal);
    color: var(--background);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent-teal);
    border-radius: 4px;
}

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

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s infinite;
}

/* Fade In Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

/* Hover Effects */
.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-3px);
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.hidden { display: none; }
.visible { display: block; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}