body {
    font-family: system-ui, -apple-system, sans-serif;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    line-height: 1.6;
}

/* Links */
a {
    color: #1976d2;
}

a:hover {
    color: #1565c0;
}

/* Site header */
.site-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.site-header h1 {
    margin: 0;
    font-size: 1.5rem;
}

.site-header a {
    display: flex;
    align-items: center;
}

/* Navigation */
.docs-nav {
    display: flex;
    gap: 1.5rem;
    padding: 1rem 0;
    border-bottom: 1px solid #ddd;
    margin-bottom: 1.5rem;
}

.docs-nav a {
    color: #555;
    text-decoration: none;
    font-weight: 500;
    padding: 0.25rem 0;
    border-bottom: 2px solid transparent;
}

.docs-nav a:hover {
    color: #1976d2;
}

.docs-nav a.active {
    color: #1976d2;
    border-bottom-color: #1976d2;
}

/* Intro section */
.intro {
    margin-bottom: 2rem;
}

.intro p {
    margin-bottom: 0.75rem;
}

/* Two column layout */
.tutorial-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
}

/* Global controls - left column */
.global-controls {
    position: sticky;
    top: 1rem;
    align-self: start;
}

.global-controls h2 {
    margin: 0 0 1rem 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: #334155;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-group h3 {
    margin: 0 0 0.5rem 0;
    font-size: 0.75rem;
    font-weight: 600;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Control row */
.control-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.4rem;
}

.control-row label {
    min-width: 80px;
    font-size: 0.75rem;
    color: #475569;
    font-variant-numeric: tabular-nums;
}

.control-row input[type="range"] {
    flex: 1;
    min-width: 80px;
}

.control-row input[type="color"] {
    width: 32px;
    height: 24px;
    padding: 2px;
    border: 1px solid #cbd5e1;
    border-radius: 4px;
    cursor: pointer;
}

.control-row .value {
    min-width: 28px;
    font-size: 0.7rem;
    color: #64748b;
    text-align: right;
    font-family: ui-monospace, monospace;
}

/* Main content - right column */
.main-content {
    min-width: 0;
}

/* Element sections */
.element-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: #fafafa;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

.element-section h2 {
    margin: 0 0 0.5rem 0;
    font-size: 1.25rem;
    color: #1e293b;
}

.element-section h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
    color: #334155;
}

.element-section > p {
    margin: 0 0 1rem 0;
    color: #475569;
    font-size: 0.95rem;
}

.element-section code {
    font-family: ui-monospace, monospace;
    background: #e2e8f0;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-size: 0.85em;
}

.format-note {
    font-size: 0.85rem;
    color: #64748b;
    background: #f1f5f9;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    border-left: 3px solid #94a3b8;
}

/* Canvas preview container */
.canvas-preview {
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 1rem;
    margin: 1rem 0;
    overflow: hidden;
}

.canvas-preview canvas {
    display: block;
    width: 100%;
    height: auto;
    background: repeating-conic-gradient(#f0f0f0 0% 25%, white 0% 50%) 50% / 16px 16px;
}

/* Local controls grid */
.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem 1.5rem;
}

/* Input styling */
input, select {
    font-family: inherit;
    font-size: inherit;
    border: 1px solid #cbd5e1;
    border-radius: 4px;
    padding: 0.3em 0.5em;
    background-color: #fff;
}

input:focus, select:focus {
    outline: none;
    border-color: #1976d2;
    box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.2);
}

/* Responsive */
@media (max-width: 700px) {
    .tutorial-layout {
        grid-template-columns: 1fr;
    }

    .global-controls {
        position: relative;
        top: 0;
        padding: 1rem;
        background: #f8fafc;
        border-radius: 8px;
        border: 1px solid #e2e8f0;
        margin-bottom: 1.5rem;
    }

    .control-group {
        margin-bottom: 1rem;
    }
}