/* =========================================================
   base.css — STRUCTURE ONLY
   No colors, no fonts beyond fallbacks. All visual decisions
   are made via CSS custom properties defined in a theme file.
   ========================================================= */

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

html {
    font-size: 16px;
    line-height: 1.6;
}

body {
    font-family: var(--font-body, system-ui, -apple-system, sans-serif);
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---------- Header ---------- */

.site-header {
    background: var(--color-header-bg);
    color: var(--color-header-text);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
}

.site-header__inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.site-header__title {
    font-family: var(--font-heading, Georgia, serif);
    font-size: 1.5rem;
    font-weight: 700;
}

.site-header__nav {
    display: flex;
    gap: 1.5rem;
}

.site-header__nav a {
    color: var(--color-header-text);
    text-decoration: none;
    font-size: 0.95rem;
}

.site-header__nav a:hover {
    color: var(--color-accent);
}

/* ---------- Three-column layout ---------- */

.layout {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 240px 1fr 220px;
    grid-template-rows: auto 1fr;
    gap: 2rem;
}

.layout__left--top {
    grid-column: 1;
    grid-row: 1;
}

.layout__left--bottom {
    grid-column: 1;
    grid-row: 2;
}

.layout__main {
    grid-column: 2;
    grid-row: 1 / 3;
}

.layout__right {
    grid-column: 3;
    grid-row: 1 / 3;
}

.layout__left,
.layout__right {
    background: var(--color-sidebar-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    align-self: start;
    position: sticky;
    top: 1rem;
}

.layout__main {
    background: var(--color-article-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    min-width: 0;
}

.column-title {
    font-family: var(--font-heading, Georgia, serif);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-muted);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

/* ---------- Left column: stories ---------- */

.story-list {
    list-style: none;
}

.story-list__item {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px dashed var(--color-border);
}

.story-list__item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.story-list__link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.story-list__title {
    display: block;
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.story-list__snippet {
    display: block;
    color: var(--color-muted);
    font-size: 0.85rem;
    line-height: 1.4;
}

.story-list__link:hover .story-list__title {
    color: var(--color-accent);
}

/* ---------- Sidebar divider ---------- */

.sidebar-divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 1rem 0;
}

/* Current story link — accent colour always, no hover change */
.story-list__link--current .story-list__title,
.story-list__link--current:hover .story-list__title,
.story-list__link--current:visited .story-list__title,
.story-list__link--current:active .story-list__title {
    color: var(--color-accent);
}

/* Suppress visited/active colour changes — hover only */
.story-list__link:visited .story-list__title,
.story-list__link:active  .story-list__title,
.story-list__link:focus   .story-list__title {
    color: var(--color-text);
}
.story-list__link:visited,
.story-list__link:active,
.story-list__link:focus {
    color: inherit;
    outline: none;
}

/* ---------- Current story ---------- */

.current-story {
    /* margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--color-border); */
}

.current-story__title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.4;
}

/* ---------- Middle column: article ---------- */

.article__title {
    font-family: var(--font-heading, Georgia, serif);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 0.75rem;
}

.article__section {
    margin-bottom: 2rem;
}

.article__heading {
    font-family: var(--font-heading, Georgia, serif);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.article__paragraph {
    margin-bottom: 1rem;
    color: var(--color-text);
}

.article__paragraph:last-child {
    margin-bottom: 0;
}

/* ---------- Right column: TOC ---------- */

.toc__list {
    list-style: none;
    padding-left: 0.75rem;
    border-left: 1px dotted var(--color-border);
}

.toc__item {
    margin-bottom: 0.25rem;
    position: relative;
}

/* Dotted connector tick from the vertical line to the link */
.toc__item::before {
    content: "";
    position: absolute;
    left: -0.75rem;
    top: 50%;
    width: 0.5rem;
    border-top: 1px dotted var(--color-border);
}

.toc__link {
    display: block;
    text-decoration: none;
    color: var(--color-muted);
    font-size: 0.9rem;
    padding: 0.35rem 0.5rem;
    border-radius: 4px;
    border-left: 2px solid transparent;
    transition: all 0.15s ease;
}

.toc__link:hover {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
    background: var(--color-hover);
}

.toc__link:hover {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
    background: var(--color-hover);
}

/* ---------- Footer ---------- */

.site-footer {
    background: var(--color-footer-bg);
    color: var(--color-footer-text);
    border-top: 1px solid var(--color-border);
    padding: 1.5rem 0;
    margin-top: 2rem;
}

.site-footer__inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
    font-size: 0.9rem;
}

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
    .layout {
        grid-template-columns: 1fr;
    }
    .layout__left,
    .layout__right {
        position: static;
    }
}

.article__list { margin: 0.75rem 0 1rem 1.5rem; }
.article__list--ordered { list-style: decimal; }
.article__list { list-style: disc; }
.article__list-item { margin-bottom: 0.35rem; line-height: 1.65; color: var(--color-text); }
.article__list .article__list { margin-top: 0.35rem; margin-bottom: 0; }

.article__table-wrap { overflow-x: auto; margin: 1.5rem 0; }
.article__table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
.article__table th,
.article__table td { border: 1px solid var(--color-border); padding: 0.5rem 0.75rem; text-align: left; }
.article__table th { background: var(--color-sidebar-bg); font-weight: 700; color: var(--color-text); }
.article__table tr:nth-child(even) td { background: var(--color-hover); }

.article__pre { background: var(--color-sidebar-bg); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1rem 1.25rem; overflow-x: auto; margin: 1rem 0; }
.article__pre code { font-family: "JetBrains Mono", "Fira Code", ui-monospace, monospace; font-size: 0.85rem; color: var(--color-text); background: none; }
.article__rule { border: none; border-top: 2px solid var(--color-border); margin: 2rem 0; }
.article__blockquote { border-left: 3px solid var(--color-accent); margin: 1rem 0; padding: 0.5rem 1rem; color: var(--color-muted); font-style: italic; }
.article__blockquote p { margin-bottom: 0.5rem; }
/* ---------- Empty state ---------- */

.empty-layout {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
}

.empty-card {
    background: var(--color-article-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 3rem 2.5rem;
    max-width: 480px;
    width: 100%;
    text-align: center;
}

.empty-card__icon {
    color: var(--color-muted);
    margin-bottom: 1.5rem;
}

.empty-card__title {
    font-family: var(--font-heading, Georgia, serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.empty-card__body {
    color: var(--color-muted);
    margin-bottom: 0.75rem;
    line-height: 1.65;
}

.empty-card__hint {
    font-size: 0.88rem;
    color: var(--color-muted);
    margin-top: 1rem;
}

.empty-card__hint code {
    background: var(--color-hover);
    border: 1px solid var(--color-border);
    border-radius: 3px;
    padding: 0.1em 0.4em;
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.85em;
}