:root {
    --primary: #1e40af;
    --bg-light: #f9fafb;
    --text-dark: #111827;
    --text-light: #6b7280;
    --spacing: 1.5rem;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    background-color: white;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing) 0;
}

header {
    background: white;
    padding: var(--spacing) 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

nav {
    display: flex;
    gap: 1rem;
}

nav a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 600;
}

.hero {
    background: var(--bg-light);
    text-align: center;
    padding: 4rem 0;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.hero p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: var(--text-light);
}

.btn {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 600;
}

section {
    padding: 4rem 0;
}

.section-header h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary);
    text-align: center;
}

.section-content {
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-light);
    font-size: 1rem;
}

.diagram-placeholder {
    height: 200px;
    margin: var(--spacing) 0;
    border: 2px dashed var(--text-light);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-style: italic;
}

.diagram img {
    width: 100%;
    height: auto;
    max-height: 200px;
    margin: var(--spacing) 0;
    object-fit: contain;
}

footer {
    text-align: center;
    padding: var(--spacing) 0;
    background: white;
    border-top: 1px solid #e5e7eb;
    color: var(--text-light);
}

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

footer a:hover {
    text-decoration: underline;
}

pre {
    background: #f6f8fa;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
}

code {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
}

.note {
    background: #f8f9fa;
    border-left: 4px solid var(--primary);
    padding: 1rem;
    margin: 1rem 0;
}

.step {
    margin-bottom: 2rem;
}