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

body {
    font-family: system-ui, -apple-system, sans-serif;
    color: #333;
    line-height: 1.6;
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }

.tool-name {
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-weight: 600;
    font-size: 0.9em;
}

h1 { margin-bottom: 0.5rem; font-size: 1.75rem; }
h2 { margin: 1.5rem 0 0.5rem; font-size: 1.1rem; color: #666; text-transform: uppercase; letter-spacing: 0.05em; }

.subtitle { color: #666; margin-bottom: 2rem; }

/* Index page */
.index-body { max-width: 760px; }
.example-list { list-style: none; padding: 0; margin-bottom: 1.5rem; }
.example-list li { padding: 0.3rem 0; }
.example-list a { font-size: 1.05rem; }

/* Example page header */
.header { margin-bottom: 1.5rem; }
.header a { color: #666; font-size: 0.9rem; }
.header h1 { margin-top: 0.25rem; }

/* Two-column row layout */
.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 0.5rem;
    align-items: start;
}

.row-full {
    grid-template-columns: 1fr;
}

.col-prose {
    padding-top: 0.5rem;
}

.col-prose p {
    margin: 0.5rem 0;
    line-height: 1.7;
}

.col-prose ul {
    margin: 0.5rem 0;
    padding-left: 1.25rem;
    line-height: 1.7;
}

.col-prose li {
    margin: 0.3rem 0;
}

.col-prose code {
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.85em;
    background: #f0f0f0;
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
}

.col-code {
    min-width: 0; /* prevent code overflow from breaking grid */
}

/* Code blocks */
.code-block {
    position: relative;
    margin-bottom: 0.75rem;
}

.code-block .lang-badge {
    position: absolute;
    top: 0.4rem;
    right: 0.5rem;
    font-size: 0.7rem;
    font-family: system-ui, sans-serif;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 1;
}

.code-block pre {
    background: #f5f5f5;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    padding: 0;
    overflow-x: auto;
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.code-block pre code {
    display: block;
    padding: 0.75rem;
    padding-right: 3rem;
}

.code-block pre code.hljs {
    background: transparent;
}

/* Output blocks */
.output-block {
    margin-bottom: 0.75rem;
}

.output-block pre {
    background: #1a1a2e;
    color: #e0e0e0;
    border: 1px solid #2a2a4e;
    border-radius: 6px;
    padding: 0;
    overflow-x: auto;
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.output-block pre:not(:has(code)) {
    padding: 0.75rem;
}

.output-block pre code {
    display: block;
    padding: 0.75rem;
}

.output-block pre code.hljs {
    background: transparent;
}

/* Dark-friendly highlight.js token overrides for output blocks */
.output-block .hljs-attr { color: #7ec8e3; }
.output-block .hljs-string { color: #a8d89f; }
.output-block .hljs-number { color: #d4a0e0; }
.output-block .hljs-literal { color: #e0a070; }
.output-block .hljs-punctuation { color: #c0c0c0; }

.output-block .output-label {
    font-size: 0.7rem;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

/* Interactive elements */
.interactive-toolbar {
    display: flex;
    gap: 0.4rem;
    margin-top: 0.4rem;
}

.interactive-toolbar button {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    font-family: system-ui, sans-serif;
    border: 1px solid #d0d0d0;
    border-radius: 4px;
    cursor: pointer;
    background: #fff;
    color: #333;
}

.interactive-toolbar .run-btn {
    background: #2563eb;
    color: #fff;
    border-color: #2563eb;
}

.interactive-toolbar .run-btn:hover {
    background: #1d4ed8;
}

.interactive-toolbar .reset-btn:hover {
    background: #f5f5f5;
}

.lua-editor {
    width: 100%;
    min-height: 3rem;
    padding: 0.75rem;
    padding-right: 3rem;
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.8125rem;
    line-height: 1.5;
    background: #f5f5f5;
    border: 2px solid #2563eb;
    border-radius: 6px;
    resize: vertical;
    tab-size: 4;
    color: #333;
}

.lua-editor:focus {
    outline: none;
    border-color: #1d4ed8;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.schema-editor {
    width: 100%;
    min-height: 3rem;
    padding: 0.75rem;
    padding-right: 3rem;
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.8125rem;
    line-height: 1.5;
    background: #f5f5f5;
    border: 2px solid #16a34a;
    border-radius: 6px;
    resize: vertical;
    tab-size: 2;
    color: #333;
}

.schema-editor:focus {
    outline: none;
    border-color: #15803d;
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.15);
}

.code-block-lua pre {
    transition: border-color 0.15s;
}

.code-block-lua pre:hover {
    border-color: #2563eb;
}

.code-block-editable pre {
    transition: border-color 0.15s;
}

.code-block-editable pre:hover {
    border-color: #16a34a;
}

.output-error {
    color: #f87171;
}

.try-converter {
    margin-top: 1.5rem;
    padding: 0.75rem 1rem;
    background: #f0f7ff;
    border: 1px solid #bfdbfe;
    border-radius: 6px;
    font-size: 0.9rem;
    color: #1e40af;
}

.try-converter a {
    font-weight: 600;
}

/* Navigation */
.nav {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 1.25rem;
    border-top: 1px solid #e0e0e0;
}

.nav a {
    font-size: 0.95rem;
}

.nav .next { margin-left: auto; }

/* Footer */
.footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
    font-size: 0.85rem;
    color: #999;
}

.footer a { color: #999; }
.footer a:hover { color: #666; }

/* Responsive: collapse to single column on narrow screens */
@media (max-width: 768px) {
    body { padding: 1rem; }
    h1 { font-size: 1.4rem; }
    .row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    .col-prose { padding-top: 0; }
    .code-block pre, .output-block pre { font-size: 0.75rem; }
}