:root {
    --color-primary: #A8D8EA;
    --color-secondary: #FFE5E5;
    --color-accent: #E5F3FF;
    --color-success: #E5FFE5;
    --color-warning: #FFF5E5;
    --color-purple: #F0E5FF;
    
    --color-text: #2D3748;
    --color-text-light: #718096;
    --color-bg: #FAFBFC;
    --color-white: #FFFFFF;
    
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    color: var(--color-text);
    background: linear-gradient(135deg, #FAFBFC 0%, #F0F4F8 100%);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* Header */
header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-top: var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.logo svg {
    animation: float 3s ease-in-out infinite;
}

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

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #A8D8EA 0%, #7FB3D5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 1.25rem;
    color: var(--color-text-light);
    font-weight: 400;
}

/* Hero */
.hero {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.hero p {
    font-size: 1.25rem;
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.feature {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    font-size: 2rem;
    font-weight: 600;
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    font-family: 'Monaco', 'Courier New', monospace;
}

.feature p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* Install Section */
.install {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-xl);
}

.install h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.install-steps {
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: flex-start;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, #7FB3D5 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h4 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.step-content p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.step-content p:last-child {
    margin-bottom: 0;
}

.alt-text {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
}

.code-block {
    background: #2D3748;
    color: #E2E8F0;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.95rem;
    margin: var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    position: relative;
    overflow-x: auto;
}

.code-block code {
    flex: 1;
}

.copy-btn {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    white-space: nowrap;
    transition: background 0.2s ease;
    flex-shrink: 0;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.copy-btn.copied {
    background: var(--color-success);
    color: var(--color-text);
    border-color: var(--color-success);
}

/* Completion Section */
.completion {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-xl);
}

.completion h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.completion-intro {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1.125rem;
}

.completion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto var(--spacing-md);
}

.completion-option h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.completion-option p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.completion-note {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.inline-code {
    background: #F7FAFC;
    color: #2D3748;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    border: 1px solid #E2E8F0;
}

/* Examples */
.examples {
    margin-bottom: var(--spacing-xl);
}

.examples h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.example-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.example {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.example h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.example .code-block {
    margin: 0;
}

/* Why Section */
.why {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-xl);
}

.why h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.why-item {
    text-align: center;
}

.why-item h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.why-item p {
    color: var(--color-text-light);
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--color-text-light);
}

footer a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.separator {
    margin: 0 var(--spacing-sm);
}

.copyright {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .hero h2 {
        font-size: 1.875rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .step {
        flex-direction: column;
    }
    
    .code-block {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .copy-btn {
        align-self: flex-end;
    }
    
    .example-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
    .feature,
    .example {
        animation: fadeInUp 0.6s ease-out;
        animation-fill-mode: both;
    }
    
    .feature:nth-child(1) { animation-delay: 0.1s; }
    .feature:nth-child(2) { animation-delay: 0.2s; }
    .feature:nth-child(3) { animation-delay: 0.3s; }
    .feature:nth-child(4) { animation-delay: 0.4s; }
    .feature:nth-child(5) { animation-delay: 0.5s; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}