/* ===================================================
   Article Page Layout
   =================================================== */
.article-page {
    padding: 60px 0 100px;
}

.article-page__header {
    margin-bottom: 48px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.article-page__back {
    display: inline-block;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 20px;
    transition: color 0.15s;
}

.article-page__back:hover {
    color: var(--accent);
    text-decoration: none;
}

.article-page__tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
}

.article-page__title {
    font-size: clamp(24px, 4vw, 40px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.article-page__meta {
    display: flex;
    gap: 8px;
    font-size: 13px;
    color: var(--muted);
    align-items: center;
}

/* ===================================================
   Article Body Typography
   =================================================== */
.article-page__body {
    max-width: 680px;
}

.article-page__body p {
    color: var(--muted);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.article-page__body h2 {
    font-size: 22px;
    font-weight: 700;
    margin: 40px 0 12px;
    color: var(--text);
    letter-spacing: -0.3px;
}

.article-page__body h3 {
    font-size: 17px;
    font-weight: 600;
    margin: 28px 0 10px;
    color: var(--text);
}

.article-page__body ul,
.article-page__body ol {
    padding-left: 24px;
    margin-bottom: 20px;
}

.article-page__body li {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 6px;
}

.article-page__body pre:not(.mermaid) {
    background-color: var(--code-bg);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 20px;
    overflow-x: auto;
    margin-bottom: 24px;
}

.article-page__body pre.mermaid {
    background: transparent;
    color: initial;
    font-family: initial;
    font-size: initial;
    line-height: initial;
}

.article-page__body code {
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    color: #e5e5e5;
}

/* Syntax highlighting (Prism.js) — tokens mapped to the site's own palette
   rather than a generic theme, so code reads as part of the same system. */
.article-page__body pre .token.comment,
.article-page__body pre .token.prolog,
.article-page__body pre .token.doctype,
.article-page__body pre .token.cdata { color: #8a8a8a; font-style: italic; }

.article-page__body pre .token.keyword,
.article-page__body pre .token.important,
.article-page__body pre .token.atrule { color: var(--orange); }

.article-page__body pre .token.string,
.article-page__body pre .token.char,
.article-page__body pre .token.attr-value { color: #9fb8e0; }

.article-page__body pre .token.function,
.article-page__body pre .token.class-name { color: #ffffff; }

.article-page__body pre .token.number,
.article-page__body pre .token.boolean { color: var(--orange); }

.article-page__body pre .token.property,
.article-page__body pre .token.tag,
.article-page__body pre .token.attr-name { color: #9fb8e0; }

.article-page__body pre .token.punctuation,
.article-page__body pre .token.operator { color: #9a9a9a; }

.article-page__body pre .token.builtin,
.article-page__body pre .token.decorator { color: var(--orange); }

.article-page__body p code,
.article-page__body li code,
.article-page__body h2 code,
.article-page__body h3 code {
    background-color: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 13px;
    color: var(--text);
}

.article-page__body blockquote {
    border-left: 3px solid var(--accent);
    margin: 24px 0;
    color: var(--muted);
    font-style: italic;
    background-color: var(--accent-dim);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 12px 16px;
}

.article-page__body table {
    width: 100%;
    border-collapse: collapse;
    margin: 8px 0 28px;
    font-size: 13px;
    overflow-x: auto;
    display: block;
}

.article-page__body th,
.article-page__body td {
    text-align: left;
    padding: 10px 14px;
    border: 1px solid var(--border);
    white-space: nowrap;
}

.article-page__body th {
    background-color: var(--surface-2);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    color: var(--muted);
}

.article-page__body td {
    font-family: var(--font-mono);
    color: var(--text);
}

.article-page__body tbody tr:nth-child(even) {
    background-color: var(--surface);
}

.article-page__diagram {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: 8px 0 28px;
    overflow-x: auto;
    display: flex;
    justify-content: center;
}

.article-page__body figure {
    margin: 8px 0 28px;
}

.article-page__body figure img {
    display: block;
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.article-page__body figcaption {
    margin-top: 10px;
    font-size: 13px;
    color: var(--muted);
    text-align: center;
}

/* For narrow-aspect screenshots (e.g. a small modal) that look oversized
   and soft when stretched to the full article width. */
.article-page__body figure.figure--narrow img {
    width: auto;
    max-width: 320px;
    margin: 0 auto;
}

.article-page__body figure.figure--narrow {
    text-align: center;
}

.article-page__diagram .mermaid {
    max-width: 100%;
}

/* ===================================================
   Flow Diagram — plain HTML/CSS replacement for mermaid,
   which renders with unreadably light default colors.
   Use for simple linear/branching flows: a vertical chain
   of .flow-diagram__node boxes joined by .flow-diagram__arrow
   connectors, ending optionally in a .flow-diagram__branch
   fan-out for the last node's multiple children.
   =================================================== */
.flow-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 20px 28px;
    margin: 8px 0 28px;
    overflow-x: auto;
}

.flow-diagram__node {
    background-color: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 18px;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    text-align: center;
    white-space: nowrap;
}

.flow-diagram__node small {
    display: block;
    margin-top: 3px;
    font-family: var(--font-sans, inherit);
    font-weight: 400;
    font-size: 11px;
    color: var(--muted);
    white-space: normal;
}

.flow-diagram__arrow {
    width: 1px;
    height: 26px;
    background-color: var(--border);
    position: relative;
    flex-shrink: 0;
}

.flow-diagram__arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid var(--muted);
}

.flow-diagram__branch {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px 28px;
    padding-top: 26px;
    position: relative;
    width: 100%;
}

.flow-diagram__branch::before {
    content: '';
    position: absolute;
    top: 0;
    left: 18%;
    right: 18%;
    height: 1px;
    background-color: var(--border);
}

.flow-diagram__branch > .flow-diagram__node {
    position: relative;
}

.flow-diagram__branch > .flow-diagram__node::before {
    content: '';
    position: absolute;
    top: -26px;
    left: 50%;
    width: 1px;
    height: 26px;
    background-color: var(--border);
}

.flow-diagram__branch__label {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-sans, inherit);
    font-size: 10px;
    color: var(--muted);
    white-space: nowrap;
    background-color: var(--surface);
    padding: 0 4px;
}

.flow-diagram__arrow-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-sans, inherit);
    font-size: 10px;
    color: var(--muted);
    white-space: nowrap;
    background-color: var(--surface);
    padding: 0 4px;
}