:root {
  --bg: #fffff8;
  --fg: #111111;
  --muted: #66594a;
  --border: #d8cfb8;
  --accent: #7b3b19;
  --link: #6a3410;
  --banner-bg: #f7f2e3;
  --serif: "et-book", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --sans: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.5;
}

article {
  max-width: 700px;
  margin: 0 auto;
  padding: 44px 24px 64px;
}

a { color: var(--link); text-decoration-color: var(--border); text-underline-offset: 2px; }
a:hover { text-decoration-color: var(--link); }

/* ---------- header ---------- */

header {
  margin-bottom: 8px;
}

.kicker {
  font-family: var(--sans);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--muted);
  margin-bottom: 10px;
}

header h1 {
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 10px;
}

.byline {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--muted);
}

/* ---------- table of contents ---------- */

.toc {
  font-family: var(--sans);
  font-size: 0.82rem;
  border: 1px solid var(--border);
  background: var(--banner-bg);
  padding: 12px 18px;
  margin: 24px 0 28px;
}

.toc-title {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-size: 0.68rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin-bottom: 4px; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

@media (min-width: 1180px) {
  article { max-width: 780px; padding-right: 280px; position: relative; margin: 0 auto; }
  .toc {
    float: right;
    clear: right;
    width: 220px;
    margin-right: -280px;
    margin-top: 4px;
  }
}

@media (min-width: 980px) and (max-width: 1179px) {
  article { max-width: 700px; }
  .toc { margin: 24px 0 28px; }
}

/* ---------- intro / drop cap ---------- */

.intro {
  margin: 20px 0 4px;
  clear: both;
}

.intro::first-letter {
  float: left;
  font-size: 3.2em;
  line-height: 0.72;
  padding: 6px 8px 0 0;
  font-weight: 700;
  color: var(--accent);
}

/* ---------- sections ---------- */

section { margin: 28px 0; clear: both; }

h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  font-size: 1.25rem;
  text-align: center;
  margin: 0 0 18px;
  color: var(--fg);
}

.break {
  text-align: center;
  margin: 8px 0;
  color: var(--border);
  letter-spacing: 0.6em;
  font-size: 1rem;
  clear: both;
}

/* ---------- status banner ---------- */

.status-banner {
  font-family: var(--sans);
  background: var(--banner-bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  padding: 14px 18px;
}

.status-banner .fase { font-weight: 600; margin-bottom: 4px; }
.status-banner .tema-status { color: var(--muted); font-size: 0.92rem; }

.status-proposto { border-left-color: #a67c2e; }
.status-aprovado_pelo_orientador,
.status-em_andamento { border-left-color: #3a6b3a; }
.status-concluido { border-left-color: var(--accent); }

/* ---------- epigraph ---------- */

.epigraph {
  margin: 0 8px;
  padding-left: 20px;
  border-left: 2px solid var(--border);
  font-style: italic;
  color: var(--muted);
}

.epigraph p { margin: 0; }

.epigraph footer {
  font-family: var(--sans);
  font-style: normal;
  text-align: right;
  font-size: 0.8rem;
  margin-top: 8px;
}

.epigraph footer::before { content: "— "; }

/* ---------- timeline / sidenotes ---------- */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--border);
}

.timeline li { padding: 2px 0 18px 18px; }

.timeline .marco { font-weight: 700; }
.timeline .janela {
  font-family: var(--sans);
  color: var(--muted);
  font-size: 0.85rem;
}

.nota {
  display: block;
  margin-top: 6px;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
  font-style: italic;
}

@media (min-width: 1180px) {
  .nota {
    float: right;
    clear: right;
    width: 240px;
    margin-top: 2px;
    margin-right: -280px;
    text-align: left;
  }
}

/* ---------- registro / log ---------- */

.log-entry {
  font-family: var(--sans);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.log-entry:last-child { border-bottom: none; }

.log-header, summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

details > summary { cursor: pointer; list-style: none; }
details > summary::-webkit-details-marker { display: none; }

details > summary::before {
  content: "›";
  display: inline-block;
  width: 0.8em;
  color: var(--muted);
  transition: transform 0.15s ease;
}

details[open] > summary::before { transform: rotate(90deg); }

.log-entry .data { color: var(--muted); font-size: 0.85rem; }

.badge {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 1px 6px;
}

.log-entry .titulo { font-weight: 600; }

.log-body { margin-top: 8px; font-family: var(--serif); font-size: 1rem; }
.log-body p { margin: 0 0 8px; }

dl.qa {
  margin: 12px 0 0;
  border-top: 1px solid var(--border);
  padding-top: 8px;
  font-family: var(--sans);
}

dl.qa dt { font-weight: 600; font-size: 0.88rem; margin-top: 10px; }
dl.qa dd { margin: 2px 0 0; color: var(--muted); font-size: 0.92rem; }

/* ---------- colophon ---------- */

.colophon {
  clear: both;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  color: var(--muted);
  font-size: 0.82rem;
}

/* ---------- dark mode ---------- */

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f;
    --fg: #e8e2d4;
    --muted: #a89a80;
    --border: #3a3327;
    --accent: #d68a4e;
    --link: #e0a165;
    --banner-bg: #201b13;
  }
}

@media (max-width: 979px) {
  body { font-size: 18px; }
  article { padding-top: 32px; }
}