:root {
    --text: #2d2d2d;
    --bg: #fafafa;
    --accent: #1a4a6e;
    --accent-dark: #102f47;
    --accent-soft: #eef3f7;
    --border: #ddd;
    --code-bg: #f0f0f0;
    --max-width: 760px;
}

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

body {
    font-family: "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    font-size: 17px;
}

a {
    color: var(--accent);
    text-underline-offset: 2px;
    text-decoration-color: rgba(26, 74, 110, 0.4);
    transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
    color: var(--accent-dark);
    text-decoration-color: currentColor;
}

header {
    border-bottom: 2px solid var(--accent);
    padding: 3rem 1.5rem 1.75rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

header h1 {
    font-size: 2rem;
    line-height: 1.25;
    letter-spacing: -0.015em;
    color: var(--accent);
    margin-bottom: 0.55rem;
}

header p {
    font-size: 1rem;
    color: #4a4a4a;
}

header p.skill-link {
    margin-top: 1.2rem;
    padding: 0.7rem 0.95rem;
    font-size: 0.92rem;
    color: var(--text);
    background: var(--accent-soft);
    border-left: 3px solid var(--accent);
    border-radius: 0 4px 4px 0;
}

header p.skill-link a {
    font-weight: 600;
}

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem 1.5rem;
}

nav h2 {
    font-size: 1.1rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

nav ol {
    padding-left: 1.5rem;
}

nav ol li {
    margin-bottom: 0.3rem;
    font-size: 0.93rem;
}

nav ol li a {
    color: var(--accent);
    text-decoration: none;
}

nav ol li a:hover {
    text-decoration: underline;
}

main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

.pitfall {
    /* .pitfall is now just a grouping container for one file's content —
       no title, no card border; visual separation lives at the pitfall (h3) level. */
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.pitfall h3, .pitfall h4 {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

/* Pitfall: a direct-child h3 inside a pitfall acts as its own sub-pitfall,
   visually separated from the next one by a dashed rule. */
.pitfall > h3 {
    margin-top: 2.25rem;
    padding-top: 1.25rem;
    border-top: 1px dashed var(--border);
    font-size: 1.1rem;
    font-weight: 600;
}

.pitfall > h3:first-of-type {
    margin-top: 1.25rem;
    padding-top: 0;
    border-top: none;
}

/* Status flags rendered just under a pitfall heading */
.pitfall-flags {
    margin-top: -0.25rem;
    margin-bottom: 0.9rem;
    display: flex;
    gap: 0.55rem;
    flex-wrap: wrap;
}

.pitfall-flags .flag {
    display: inline-flex;
    align-items: center;
    gap: 0.35em;
    padding: 3px 10px;
    font-size: 0.78rem;
    font-weight: 800 !important;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-radius: 3px;
    border: 2px solid;
    line-height: 1.5;
}

.pitfall-flags .flag::before {
    content: "\01F6A9"; /* 🚩 red flag */
    font-size: 0.95em;
    font-weight: normal;
    line-height: 1;
}

.pitfall-flags .flag-tbd {
    color: #d00000 !important;
    background: #ffe0e0;
    border-color: #d00000;
    border-style: solid;
}

.pitfall-flags .flag-shared {
    color: #d00000 !important;
    background: #ffe0e0;
    border-color: #d00000;
    border-style: dashed;
}

.pitfall-flags .flag-related {
    color: #d00000 !important;
    background: #ffe0e0;
    border-color: #d00000;
    border-style: dotted;
}

.pitfall-flags .flag a {
    color: #d00000 !important;
    text-decoration: underline;
    text-transform: none;
    letter-spacing: 0;
    font-weight: 800;
}

.pitfall-flags .flag a:hover {
    color: #ff0000 !important;
}

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

.pitfall ul, .pitfall ol {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
}

.pitfall li {
    margin-bottom: 0.5rem;
}

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

.pitfall code {
    background: var(--code-bg);
    padding: 0.15em 0.35em;
    border-radius: 3px;
    font-size: 0.9em;
}

.pitfall .highlight {
    margin-bottom: 0.75rem;
    border-radius: 4px;
    overflow-x: auto;
}

.pitfall .highlight pre {
    padding: 0.75rem 1rem;
    margin: 0;
    font-size: 0.85em;
    line-height: 1.5;
    min-width: max-content;
}

.pitfall .highlight pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
}

/* Chroma syntax highlighting (monokailight) */
.chroma { color:#272822; background-color:#fafafa; }
.chroma .ln { white-space:pre; -webkit-user-select:none; user-select:none; margin-right:0.4em; padding:0 0.4em 0 0.4em; color:#7f7f7f }
.chroma .line { display:flex; }
.chroma .hl { background-color:#e1e1e1 }
.chroma .k { color:#00a8c8 }
.chroma .kc { color:#00a8c8 }
.chroma .kd { color:#00a8c8 }
.chroma .kn { color:#f92672 }
.chroma .kp { color:#00a8c8 }
.chroma .kr { color:#00a8c8 }
.chroma .kt { color:#00a8c8 }
.chroma .na { color:#75af00 }
.chroma .nc { color:#75af00 }
.chroma .no { color:#00a8c8 }
.chroma .nd { color:#75af00 }
.chroma .ne { color:#75af00 }
.chroma .nx { color:#75af00 }
.chroma .nf { color:#75af00 }
.chroma .fm { color:#75af00 }
.chroma .s { color:#d88200 }
.chroma .sa { color:#d88200 }
.chroma .sb { color:#d88200 }
.chroma .sc { color:#d88200 }
.chroma .dl { color:#d88200 }
.chroma .sd { color:#d88200 }
.chroma .s2 { color:#d88200 }
.chroma .se { color:#8045ff }
.chroma .sh { color:#d88200 }
.chroma .si { color:#d88200 }
.chroma .sx { color:#d88200 }
.chroma .sr { color:#d88200 }
.chroma .s1 { color:#d88200 }
.chroma .ss { color:#d88200 }
.chroma .m { color:#ae81ff }
.chroma .mb { color:#ae81ff }
.chroma .mf { color:#ae81ff }
.chroma .mh { color:#ae81ff }
.chroma .mi { color:#ae81ff }
.chroma .il { color:#ae81ff }
.chroma .mo { color:#ae81ff }
.chroma .o { color:#f92672 }
.chroma .ow { color:#f92672 }
.chroma .c { color:#75715e }
.chroma .ch { color:#75715e }
.chroma .cm { color:#75715e }
.chroma .c1 { color:#75715e }
.chroma .cs { color:#75715e }
.chroma .cp { color:#75715e }
.chroma .cpf { color:#75715e }
.chroma .ge { font-style:italic }
.chroma .gs { font-weight:bold }
.chroma .l { color:#ae81ff }
.chroma .err { color:#960050 }

.category {
    margin-top: 3rem;
}

.category-heading {
    font-size: 1.5rem;
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
    padding-bottom: 0.4rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.category > .pitfall:first-of-type {
    margin-top: 1rem;
    padding-top: 0;
    border-top: none;
}

nav .toc {
    list-style: none;
    padding-left: 0;
}

nav .toc-category {
    margin-bottom: 1rem;
}

nav .toc-category-link {
    display: block;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    font-size: 0.88rem;
    letter-spacing: 0.03em;
}

nav .toc-category-link:hover {
    text-decoration: underline;
}

nav .toc-category > ol {
    padding-left: 1.5rem;
}

footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem;
    border-top: 2px solid var(--accent);
    text-align: center;
    font-size: 0.85rem;
    color: #777;
}

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

footer .contributors {
    margin: 0.75rem 0 0;
}

footer .contributors p {
    margin: 0.15rem 0;
}

strong {
    font-weight: 600;
}

@media (max-width: 600px) {
    body {
        font-size: 15px;
    }

    header, nav, main, footer {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}