/* ---------- Web fonts (body + nameplate) ---------- */
/* Vendored body + nameplate web fonts (Google Fonts, OFL).
 * Only the latin and latin-ext subsets are shipped — together they
 * cover every Brazilian-Portuguese character. Files are deduplicated
 * by source URL: a variable family serves the same woff2 for several
 * weights (each weight then gets its own @font-face pointing at the
 * shared file), while a static family ships a distinct file per
 * weight. Downloaded from the css2 API and served locally so the
 * site makes no external request. Regenerate with
 * scratchpad/fetch_fonts.py.
 */
@font-face {
  font-family: 'Libre Baskerville';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/librebaskerville-400-italic-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Libre Baskerville';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/librebaskerville-400-italic-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Libre Baskerville';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/librebaskerville-400-normal-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Libre Baskerville';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/librebaskerville-400-normal-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Libre Baskerville';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/librebaskerville-400-normal-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Libre Baskerville';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/librebaskerville-400-normal-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'EB Garamond';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/ebgaramond-400-italic-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'EB Garamond';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/ebgaramond-400-italic-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'EB Garamond';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/ebgaramond-400-normal-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'EB Garamond';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/ebgaramond-400-normal-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'EB Garamond';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/ebgaramond-400-normal-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'EB Garamond';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/ebgaramond-400-normal-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/*
 * Nemo's Newspaper — base stylesheet (layout v1).
 * Palette and metrics live in the variables below. The masthead takes
 * --header-height of the screen (spec: 1/5, kept easy to change); the
 * page itself never scrolls — only the three columns do.
 */

:root {
  --header-height: 20vh; /* masthead height: 1/5 of the screen */

  /* Aged-newspaper palette: Kraft/café — warm kraft-paper beige, dark
     coffee-brown ink (chosen from the Fase C design exploration). */
  --color-paper: #e8dcc0;
  --color-ink: #2d2013;
  --color-ink-soft: #8a7a5d; /* grayish brown: quote, subtitles, notes */
  --color-rule: #8a6d3f;     /* light brown: dividers */
  --color-link: #79451d;     /* brown hyperlinks */

  /* Custom per-column scrollbar: a translucent brown Apple-style pill.
     Colours mirror the palette as #rrggbbaa — edge = link brown, core =
     lighter rule brown so the pill reads a touch lighter inside. */
  --scroll-thumb: #79451d57;       /* #79451d link brown */
  --scroll-thumb-core: #8a6d3f4d;  /* #8a6d3f rule brown */
  --scroll-thumb-hover: #79451d99;

  /* Body serif and nameplate (Fase C decision): Libre Baskerville for the
     text (Baskerville lineage), EB Garamond for the masthead title.
     Both vendored offline as woff2 (see the appended @font-face sheet);
     the fallbacks cover the swap window before they load. */
  --font-stack: 'Libre Baskerville', Georgia, serif;
  --font-nameplate: 'EB Garamond', Georgia, serif;
  --font-mono: Consolas, 'Courier New', monospace; /* code blocks only */
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  overflow: hidden; /* nothing outside the columns moves */
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-stack);
}

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

/* ---------- Masthead ---------- */

/*
 * Row 1: logo | title | quote, vertically centered with each other.
 * Equal side tracks keep the title page-centered. Row 2: the
 * date/edition subtitle, all the way to the left, below the logo.
 */
.site-header {
  flex: 0 0 var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  grid-template-rows: 1fr auto;
  align-items: center;
  column-gap: 1rem;
  padding: 0.5rem 1.5rem 0.4rem;
  border-bottom: 3px solid var(--color-ink); /* Oxford rule: thick line */
}

.masthead-logo {
  grid-row: 1;
  grid-column: 1;
  justify-self: start;
}

.masthead-logo img {
  display: block;
  max-height: calc(var(--header-height) * 0.5);
  padding: 3px; /* thin dark border that does not touch the image */
  border: 1px solid var(--color-ink);
}

.masthead-title {
  grid-row: 1;
  grid-column: 2;
  margin: 0;
  font-family: var(--font-nameplate);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  letter-spacing: 0.04em;
  text-align: center;
}

.masthead-quote {
  grid-row: 1;
  grid-column: 3;
  justify-self: end;
  max-width: 30ch;
  text-align: center;
  color: var(--color-ink-soft);
}

.quote-text {
  margin: 0;
  font-size: 0.72rem;
}

.quote-attribution {
  margin: 0.15rem 0 0;
  font-size: 0.62rem;
}

.masthead-subtitle {
  grid-row: 2;
  grid-column: 1 / -1;
  justify-self: start;
  margin: 0.3rem 0 0;
  font-size: 0.85rem;
}

/* ---------- Columns ---------- */

.columns {
  flex: 1;
  min-height: 0; /* lets the columns scroll instead of growing the page */
  display: flex;
  position: relative; /* anchors the hidden section radios */
  margin-top: 3px; /* Oxford rule: gap + thin line below the thick one */
  border-top: 1px solid var(--color-ink);
}

.column {
  flex: 1 1 0;
  min-width: 0;
  min-height: 0; /* also lets a single column scroll in narrow mode */
  overflow-y: auto;
  padding: 1.4rem 1.6rem 3rem;
  /* Firefox: thin translucent-brown scrollbar (no pill/gradient there). */
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-thumb) transparent;
}

.column + .column {
  border-left: 1px solid var(--color-rule);
}

/*
 * WebKit/Blink (Chrome, Edge, Safari): a subtle translucent-brown pill
 * with rounded ends, inset from the edge so it floats just left of the
 * column divider (spec: Apple-style scroll rectangle). The transparent
 * border plus background-clip create the inset; the horizontal gradient
 * makes the pill's core a touch lighter than its edges.
 */
.column::-webkit-scrollbar {
  width: 11px;
}

.column::-webkit-scrollbar-track {
  background: transparent;
}

.column::-webkit-scrollbar-thumb {
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: padding-box;
  background-image: linear-gradient(
    to right,
    var(--scroll-thumb),
    var(--scroll-thumb-core),
    var(--scroll-thumb)
  );
}

.column::-webkit-scrollbar-thumb:hover {
  background-image: linear-gradient(
    to right,
    var(--scroll-thumb-hover),
    var(--scroll-thumb-hover)
  );
}

/* ---------- Footer (expediente) ---------- */

/*
 * Thin colophon band below the columns. Part of the page frame, so it
 * never scrolls. Content is provisional — finalised in Fase C.
 */
.site-footer {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.4rem 1.5rem;
  border-top: 1px solid var(--color-ink);
  font-size: 0.68rem;
  color: var(--color-ink-soft);
}

.footer-sep {
  color: var(--color-rule);
}

/* ---------- Articles ---------- */

/* Short rule between articles of the same section: 75% wide, never
 * touching the column edges. Its top margin keeps the note→rule gap
 * slightly smaller than the note→text gap above (spec). */
.article + .article::before {
  content: "";
  display: block;
  width: 75%;
  margin: 1.1rem auto 1.4rem;
  border-top: 1px solid var(--color-rule);
}

.pos-left { text-align: left; }
.pos-center { text-align: center; }
.pos-right { text-align: right; }

/* Label line at the top of the article: "{date} — {label}". */
.article-label {
  margin: 0 0 0.5rem;
  font-size: 0.7rem;
  color: var(--color-ink-soft);
}

.article-title {
  margin: 0 0 0.4rem;
  font-size: 1.55rem;
  text-align: center;
}

.article-subtitle {
  margin: 0 0 1.2rem;
  font-size: 0.9rem;
  text-align: center;
  color: var(--color-ink-soft);
}

/* Author byline: small, between the opening block and the body. */
.article-byline {
  margin: 0.2rem 0 1.1rem;
  font-size: 0.78rem;
}

.article-body {
  font-size: 0.88rem;
  line-height: 1.6;
}

/* Body headings never outgrow the article title. */
.article-body h1 { font-size: 1.25rem; }
.article-body h2 { font-size: 1.12rem; }
.article-body h3 { font-size: 1.02rem; }
.article-body h4,
.article-body h5,
.article-body h6 { font-size: 0.92rem; }

/* Images always sit between paragraphs (the parser turns each image
 * paragraph into a figure) with the caption centered under them. */
.article-body figure {
  margin: 1.1rem 0;
  text-align: center;
}

.article-body img {
  max-width: 100%;
  height: auto;
  padding: 3px; /* thin ink border that does not touch the image */
  border: 1px solid var(--color-ink);
}

.article-body figcaption {
  margin-top: 0.3rem;
  font-size: 0.74rem;
  color: var(--color-ink-soft);
}

/* Code blocks: rounded rectangle, no drawn border. The cream fill and
 * token colours come from the appended chroma theme (on .chroma). Long
 * lines scroll inside the block, never the column. */
.article-body pre {
  overflow-x: auto;
  margin: 1.1rem 0;
  padding: 0.7rem 0.9rem;
  border-radius: 8px;
  font-family: var(--font-mono); /* body is serif now; code stays monospace */
  font-size: 0.82rem;
  line-height: 1.45;
}

/* Inline code: a small on-theme chip, distinct from block code. */
.article-body :not(pre) > code {
  padding: 0.05rem 0.3rem;
  border-radius: 4px;
  background: rgba(51, 38, 26, 0.06);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

/* Embedded YouTube player: 16:9, fills the column width, stays contained. */
.article-body .youtube-embed {
  margin: 1.1rem 0;
  width: 100%;
  aspect-ratio: 16 / 9;
}

.article-body .youtube-embed iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Math (KaTeX): a centered display formula that scrolls horizontally
   inside its own block when it is wider than the column, so a long
   equation never breaks the surrounding layout (spec requirement). */
.article-body .latex-block {
  margin: 1.1rem 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.article-body .latex-block .katex-display {
  margin: 0; /* the wrapper owns the vertical rhythm */
}

.article-body blockquote {
  margin: 1rem 0 1rem 0.5rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--color-rule); /* brown quote rule */
}

.article-body li::marker {
  color: var(--color-ink); /* bullets match the text, not the links */
}

/* Notes: light, small, italic, centered. */
.article-notes {
  margin-top: 1.6rem;
}

.article-note {
  margin: 0.3rem 0;
  font-size: 0.74rem;
  font-style: italic;
  text-align: center;
  color: var(--color-ink-soft);
}

/* ---------- Narrow screen: one section + tabs ---------- */

/* Hidden but focusable: the radios only do anything below the breakpoint. */
.section-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* Wide layout keeps the three real columns; the tabs stay hidden. */
.section-tabs {
  display: none;
}

/*
 * Below this width three legible columns no longer fit, so only one
 * section shows at a time, with square "Seção #n" buttons above it
 * (The Monospace Web style, our palette). The checked radio picks which
 * column is visible and which tab reads as pressed.
 */
@media (max-width: 900px) {
  .columns {
    flex-direction: column;
  }

  .section-tabs {
    display: flex;
    flex: 0 0 auto;
    gap: 0.5rem;
    padding: 0.8rem 1.6rem 1rem; /* beige breathing room below the tabs */
  }

  .section-tab {
    padding: 0.35rem 0.8rem;
    border: 1px solid var(--color-ink);
    color: var(--color-ink);
    font-size: 0.8rem;
    line-height: 1.2;
    cursor: pointer;
    user-select: none;
    white-space: nowrap; /* square button, never wraps mid-label */
  }

  .section-tab:hover {
    background: rgba(51, 38, 26, 0.08);
  }

  /* One column at a time; the vertical divider is meaningless here. */
  .column {
    display: none;
  }

  .column + .column {
    border-left: none;
  }

  #section-1:checked ~ .column:nth-of-type(1),
  #section-2:checked ~ .column:nth-of-type(2),
  #section-3:checked ~ .column:nth-of-type(3) {
    display: block;
  }

  /* Active tab: inverted fill, like a pressed Monospace-Web button. */
  #section-1:checked ~ .section-tabs .section-tab:nth-child(1),
  #section-2:checked ~ .section-tabs .section-tab:nth-child(2),
  #section-3:checked ~ .section-tabs .section-tab:nth-child(3) {
    background: var(--color-ink);
    color: var(--color-paper);
  }
}

/* ---------- Code highlight (Vim Light Hard via chroma) ---------- */
/* Background */ .bg { color: #3c3836; background-color: #f9f5d7;-moz-tab-size: 4; -o-tab-size: 4; tab-size: 4; }
/* PreWrapper */ .chroma { color: #3c3836; background-color: #f9f5d7;-moz-tab-size: 4; -o-tab-size: 4; tab-size: 4; -webkit-text-size-adjust: none; }
/* Error */ .chroma .err { color: #cc241d }
/* LineLink */ .chroma .lnlinks { outline: none; text-decoration: none; color: inherit }
/* LineTableTD */ .chroma .lntd { vertical-align: top; padding: 0; margin: 0; border: 0; }
/* LineTable */ .chroma .lntable { border-spacing: 0; padding: 0; margin: 0; border: 0; }
/* LineHighlight */ .chroma .hl { background-color: #e0dcc1 }
/* LineNumbersTable */ .chroma .lnt { white-space: pre; -webkit-user-select: none; user-select: none; margin-right: 0.4em; padding: 0 0.4em 0 0.4em;color: #9d9b9a }
/* LineNumbers */ .chroma .ln { white-space: pre; -webkit-user-select: none; user-select: none; margin-right: 0.4em; padding: 0 0.4em 0 0.4em;color: #9d9b9a }
/* Line */ .chroma .line { display: flex; }
/* Keyword */ .chroma .k { color: #9d0006 }
/* KeywordConstant */ .chroma .kc { color: #8f3f71 }
/* KeywordDeclaration */ .chroma .kd { color: #9d0006 }
/* KeywordNamespace */ .chroma .kn { color: #427b58 }
/* KeywordPseudo */ .chroma .kp { color: #9d0006 }
/* KeywordReserved */ .chroma .kr { color: #9d0006 }
/* KeywordType */ .chroma .kt { color: #b57614 }
/* NameAttribute */ .chroma .na { color: #b57614 }
/* NameClass */ .chroma .nc { color: #b57614 }
/* NameConstant */ .chroma .no { color: #8f3f71 }
/* NameDecorator */ .chroma .nd { color: #b57614 }
/* NameException */ .chroma .ne { color: #9d0006 }
/* NameLabel */ .chroma .nl { color: #af3a03 }
/* NameTag */ .chroma .nt { color: #427b58 }
/* NameBuiltin */ .chroma .nb { color: #af3a03 }
/* NameBuiltinPseudo */ .chroma .bp { color: #8f3f71 }
/* NameVariable */ .chroma .nv { color: #076678 }
/* NameVariableClass */ .chroma .vc { color: #076678 }
/* NameVariableGlobal */ .chroma .vg { color: #076678 }
/* NameVariableInstance */ .chroma .vi { color: #076678 }
/* NameVariableMagic */ .chroma .vm { color: #076678 }
/* NameFunction */ .chroma .nf { color: #79740e }
/* NameFunctionMagic */ .chroma .fm { color: #79740e }
/* LiteralString */ .chroma .s { color: #79740e }
/* LiteralStringAffix */ .chroma .sa { color: #79740e }
/* LiteralStringBacktick */ .chroma .sb { color: #79740e }
/* LiteralStringChar */ .chroma .sc { color: #79740e }
/* LiteralStringDelimiter */ .chroma .dl { color: #79740e }
/* LiteralStringDoc */ .chroma .sd { color: #79740e }
/* LiteralStringDouble */ .chroma .s2 { color: #79740e }
/* LiteralStringEscape */ .chroma .se { color: #9d0006 }
/* LiteralStringHeredoc */ .chroma .sh { color: #79740e }
/* LiteralStringInterpol */ .chroma .si { color: #af3a03 }
/* LiteralStringOther */ .chroma .sx { color: #79740e }
/* LiteralStringRegex */ .chroma .sr { color: #79740e }
/* LiteralStringSingle */ .chroma .s1 { color: #79740e }
/* LiteralStringSymbol */ .chroma .ss { color: #8f3f71 }
/* LiteralNumber */ .chroma .m { color: #8f3f71 }
/* LiteralNumberBin */ .chroma .mb { color: #8f3f71 }
/* LiteralNumberFloat */ .chroma .mf { color: #8f3f71 }
/* LiteralNumberHex */ .chroma .mh { color: #8f3f71 }
/* LiteralNumberInteger */ .chroma .mi { color: #8f3f71 }
/* LiteralNumberIntegerLong */ .chroma .il { color: #8f3f71 }
/* LiteralNumberOct */ .chroma .mo { color: #8f3f71 }
/* Operator */ .chroma .o { color: #427b58 }
/* OperatorWord */ .chroma .ow { color: #9d0006 }
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