/* go-for-c interactive site — a clean, readable layout with codapi styling. */

:root {
    --fg: #1b1b1b;
    --bg: #ffffff;
    --muted: #666;
    --accent: #007d9c;        /* Go cyan */
    --accent-dark: #005b73;
    --border: #e2e2e2;
    --code-bg: #f6f8fa;
    --code-fg: #24292e;
    --run-bg: #007d9c;
    --run-fg: #ffffff;
    --max: 46rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --fg: #e6e6e6;
        --bg: #16181d;
        --muted: #9aa0a6;
        --accent: #38bdf8;
        --accent-dark: #7dd3fc;
        --border: #2b2f36;
        --code-bg: #0f1115;
        --code-fg: #e6e6e6;
        --run-bg: #0ea5c4;
        --run-fg: #06121a;
    }
}

* { box-sizing: border-box; }

html { font-size: 17px; }

body {
    margin: 0;
    color: var(--fg);
    background: var(--bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
        Arial, sans-serif;
    line-height: 1.6;
}

.wrap {
    max-width: var(--max);
    margin: 0 auto;
    padding: 1.5rem 1.25rem 5rem;
}

/* Top navigation */
.topnav {
    max-width: var(--max);
    margin: 0 auto;
    padding: 1rem 1.25rem 0;
    display: flex;
    gap: 1rem;
    align-items: baseline;
    flex-wrap: wrap;
}
.topnav a { color: var(--accent); text-decoration: none; }
.topnav a:hover { text-decoration: underline; }
.topnav .home { font-weight: 600; }
.topnav .sep { color: var(--muted); }

h1, h2, h3 { line-height: 1.25; }
h1 { font-size: 1.9rem; margin: 0.5rem 0 0.75rem; }
h2 {
    font-size: 1.35rem;
    margin: 2.25rem 0 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border);
}
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }

p, li { font-size: 1rem; }

a { color: var(--accent); }

.lede { color: var(--muted); font-size: 1.05rem; }

/* Inline + block code */
code {
    font-family: "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo,
        monospace;
    font-size: 0.9em;
}
p code, li code {
    background: var(--code-bg);
    color: var(--code-fg);
    padding: 0.1em 0.35em;
    border-radius: 4px;
}

pre {
    background: var(--code-bg);
    color: var(--code-fg);
    padding: 0.9rem 1rem;
    border-radius: 8px 8px 0 0;         /* flat bottom; widget toolbar sits below */
    overflow-x: auto;
    margin: 1.25rem 0 0;
    border: 1px solid var(--border);
    font-size: 0.88rem;
    line-height: 1.5;
}
pre code { background: none; padding: 0; font-size: inherit; }

/* A plain (non-runnable) code block keeps its rounded corners. */
pre.static { border-radius: 8px; margin: 1.25rem 0; }

/* Callout box */
.note {
    border-left: 3px solid var(--accent);
    background: var(--code-bg);
    padding: 0.6rem 1rem;
    margin: 1.25rem 0;
    border-radius: 0 6px 6px 0;
}
.note p { margin: 0.3rem 0; }

/* Tables */
table { border-collapse: collapse; width: 100%; margin: 1.25rem 0; font-size: 0.95rem; }
th, td { border: 1px solid var(--border); padding: 0.4rem 0.6rem; text-align: left; }
th { background: var(--code-bg); }

/* Module index cards */
.modgrid { list-style: none; padding: 0; margin: 1.5rem 0; display: grid; gap: 0.5rem; }
.modgrid a {
    display: block;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: var(--fg);
}
.modgrid a:hover { border-color: var(--accent); }
.modgrid .num { color: var(--accent); font-weight: 600; margin-right: 0.5rem; }
.modgrid .desc { color: var(--muted); display: block; font-size: 0.9rem; }

/* ---- codapi widget styling (adapted from the default snippet.css) ---- */
codapi-snippet { display: block; margin: 0 0 1.25rem; }

codapi-toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 8px 8px;
}
codapi-toolbar button {
    background: var(--run-bg);
    color: var(--run-fg);
    border: none;
    border-radius: 6px;
    padding: 0.25rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
}
codapi-toolbar button:hover { background: var(--accent-dark); }
codapi-toolbar a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.85rem;
}
codapi-toolbar a:hover { text-decoration: underline; }
codapi-status { color: var(--muted); font-size: 0.8rem; }

codapi-output pre {
    border-radius: 8px;
    margin: 0.5rem 0 0;
    border: 1px solid var(--border);
    background: var(--bg);
}
codapi-output pre code { color: var(--fg); }

/* The fallback <pre> we place after each snippet: hidden once the widget binds,
   but visible (as expected output) if JS is off or the server is down. */
.fallback { font-size: 0.82rem; opacity: 0.85; }
.fallback-label { color: var(--muted); font-size: 0.8rem; margin: 0.75rem 0 0.1rem; }

footer {
    max-width: var(--max);
    margin: 0 auto;
    padding: 2rem 1.25rem;
    color: var(--muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}