:root {
  --sidebar-bg: #f4f0e8;
  --sidebar-border: #dfd5c5;
  --content-bg: #fbfaf7;
  --ink: #191919;
  --muted: #60594f;
  --accent: #ab2330;
  --panel: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #f8f5ef 0%, #f4efe5 100%);
}

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

a:hover {
  text-decoration: underline;
}

.site-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  transition: grid-template-columns 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.site-shell.sidebar-collapsed {
  grid-template-columns: 84px minmax(0, 1fr);
}

.sidebar {
  padding: 24px 18px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  transition:
    padding 320ms cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.sidebar-brand-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.sidebar-toggle {
  width: 40px;
  height: 40px;
  margin-top: 2px;
  flex: 0 0 auto;
  border: 1px solid rgba(171, 35, 48, 0.14);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(34, 25, 17, 0.06);
  transition:
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 220ms cubic-bezier(0.22, 1, 0.36, 1),
    background-color 220ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.sidebar-toggle span {
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transition: transform 240ms cubic-bezier(0.22, 1, 0.36, 1), opacity 180ms ease;
}

.sidebar-toggle:hover {
  background: #fff;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(34, 25, 17, 0.08);
}

.sidebar-brand {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--sidebar-border);
  margin-bottom: 24px;
}

.sidebar-logo {
  width: 72px;
  height: auto;
  display: block;
  margin-bottom: 14px;
}

.sidebar-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.15;
}

.sidebar-subtitle {
  margin-top: 8px;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--muted);
  font-style: italic;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.nav-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-disclosure {
  display: block;
}

.nav-disclosure summary {
  list-style: none;
}

.nav-disclosure summary::-webkit-details-marker {
  display: none;
}

.nav-link {
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--ink);
  font-weight: 600;
  display: block;
}

.nav-link:hover {
  background: rgba(171, 35, 48, 0.08);
  text-decoration: none;
}

.nav-link.active {
  background: var(--panel);
  color: var(--accent);
  box-shadow: 0 8px 24px rgba(25, 25, 25, 0.08);
}

.nav-summary {
  cursor: pointer;
  position: relative;
  padding-right: 28px;
}

.nav-summary::after {
  content: "+";
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-weight: 700;
}

.nav-disclosure[open] .nav-summary::after {
  content: "-";
}

.nav-children {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
}

.nav-sublink {
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-sublink:hover {
  background: rgba(171, 35, 48, 0.08);
  text-decoration: none;
}

.nav-sublink.active {
  background: rgba(255, 255, 255, 0.8);
  color: var(--accent);
}

.content {
  position: relative;
  padding: 36px 40px 56px;
  max-width: 980px;
}

.page-search {
  position: fixed;
  top: 26px;
  right: 34px;
  z-index: 20;
  width: min(420px, calc(100vw - 56px));
}

.page-search-form {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  width: 100%;
}

.page-search-button {
  width: 46px;
  height: 46px;
  border: 1px solid rgba(171, 35, 48, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(34, 25, 17, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.page-search-button:hover {
  transform: translateY(-1px);
  background: #fff;
}

.page-search-button svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.page-search-input {
  width: 0;
  opacity: 0;
  pointer-events: none;
  border: 1px solid rgba(171, 35, 48, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font: inherit;
  padding: 12px 16px;
  box-shadow: 0 12px 28px rgba(34, 25, 17, 0.08);
  transition: width 220ms ease, opacity 180ms ease, padding 220ms ease, margin 220ms ease;
}

.page-search-clear {
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #35518e;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: scale(0.9);
  transition: opacity 180ms ease, transform 180ms ease;
}

.page-search-clear svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.page-search:hover .page-search-input,
.page-search:focus-within .page-search-input {
  width: 340px;
  opacity: 1;
  pointer-events: auto;
}

.page-search:hover .page-search-clear,
.page-search:focus-within .page-search-clear {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}

.page-search-suggestions {
  display: none;
  margin-top: 10px;
  padding: 8px;
  border: 1px solid rgba(171, 35, 48, 0.14);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 14px 32px rgba(34, 25, 17, 0.12);
  backdrop-filter: blur(6px);
}

.page-search-suggestions.visible {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-search-suggestion {
  width: 100%;
  border: 0;
  border-radius: 14px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  padding: 10px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-search-suggestion:hover {
  background: rgba(171, 35, 48, 0.08);
}

.page-search-suggestion-label {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-search-suggestion-snippet {
  color: var(--ink);
  font-size: 0.96rem;
  line-height: 1.45;
}

.page-search-input::placeholder {
  color: #7f7569;
}

.page-search-input:focus {
  outline: 2px solid rgba(171, 35, 48, 0.22);
  outline-offset: 0;
}

.page-search-highlight {
  background: #f4dd77;
  color: var(--ink);
  padding: 0.04em 0.08em;
  border-radius: 0.2em;
}

.page-search-highlight.active {
  background: #f0b32d;
  box-shadow: 0 0 0 2px rgba(171, 35, 48, 0.14);
}

.eyebrow {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

h1,
h2,
h3 {
  line-height: 1.15;
  margin-top: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: 16px;
}

h2 {
  font-size: 1.4rem;
  margin-top: 34px;
}

.lead {
  font-size: 1.16rem;
  line-height: 1.7;
  color: var(--muted);
  max-width: 760px;
  margin-bottom: 28px;
}

p,
li {
  font-size: 1rem;
  line-height: 1.65;
}

ul,
ol {
  padding-left: 1.3rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin: 28px 0;
}

.card {
  background: var(--panel);
  border: 1px solid #e9e1d5;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 12px 28px rgba(34, 25, 17, 0.06);
  display: flex;
  flex-direction: column;
}

.card h3 {
  margin-bottom: 10px;
}

.card p {
  flex: 1;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.button.secondary {
  background: #2f2a24;
}

.button:hover {
  text-decoration: none;
  opacity: 0.92;
}

.meta {
  color: var(--muted);
  font-size: 0.96rem;
}

.notice {
  padding: 16px 18px;
  border-radius: 14px;
  background: #fff7ea;
  border: 1px solid #ead6ac;
  color: #5b4b2d;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 18px;
  padding-bottom: 2px;
  border-top: 1px solid var(--sidebar-border);
  color: #6b5f51;
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, Garamond, Georgia, serif;
  font-size: 0.92rem;
  font-style: italic;
  font-variant: small-caps;
  letter-spacing: 0.12em;
  text-transform: none;
  text-align: left;
}

.sidebar-footer-dot {
  font-size: 0.5em;
  vertical-align: middle;
}

.site-shell.sidebar-collapsed .sidebar {
  padding-left: 12px;
  padding-right: 12px;
}

.site-shell.sidebar-collapsed .sidebar-toggle {
  transform: scale(0.96);
}

.site-shell.sidebar-collapsed .sidebar-nav,
.site-shell.sidebar-collapsed .sidebar-footer {
  opacity: 0;
  pointer-events: none;
}

.site-shell.sidebar-collapsed .sidebar-brand-top {
  justify-content: center;
}

.site-shell.sidebar-collapsed .sidebar-toggle {
  margin-top: 0;
}

.site-shell.sidebar-collapsed .sidebar-nav,
.site-shell.sidebar-collapsed .sidebar-footer {
  max-height: 0;
  overflow: hidden;
  margin: 0;
  padding-top: 0;
  padding-bottom: 0;
  border: 0;
  transform: translateX(-10px);
  transition:
    opacity 180ms ease,
    transform 260ms cubic-bezier(0.22, 1, 0.36, 1),
    max-height 320ms cubic-bezier(0.22, 1, 0.36, 1),
    margin 320ms cubic-bezier(0.22, 1, 0.36, 1),
    padding 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.site-shell.sidebar-collapsed .sidebar-brand {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.site-shell.sidebar-collapsed .sidebar-logo,
.site-shell.sidebar-collapsed .sidebar-title,
.site-shell.sidebar-collapsed .sidebar-subtitle {
  display: none;
}

.sidebar-brand,
.sidebar-nav,
.sidebar-footer {
  transform: translateX(0);
  transition:
    opacity 220ms ease,
    transform 300ms cubic-bezier(0.22, 1, 0.36, 1),
    max-height 320ms cubic-bezier(0.22, 1, 0.36, 1),
    margin 320ms cubic-bezier(0.22, 1, 0.36, 1),
    padding 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

code {
  background: #f1ece3;
  padding: 2px 6px;
  border-radius: 6px;
}

img {
  max-width: 100%;
}

.authors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin: 28px 0;
}

.author-card {
  background: var(--panel);
  border: 1px solid #e9e1d5;
  border-radius: 18px;
  padding: 24px 20px;
  text-align: center;
  box-shadow: 0 12px 28px rgba(34, 25, 17, 0.06);
}

.author-photo {
  width: 152px;
  height: 152px;
  object-fit: cover;
  border-radius: 999px;
  margin-bottom: 14px;
}

.author-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.author-role {
  color: var(--muted);
}

.corner-logos {
  position: fixed;
  right: 22px;
  bottom: 18px;
  display: flex;
  align-items: flex-end;
  gap: 12px;
  opacity: 0.92;
  z-index: 30;
}

.corner-logo {
  display: block;
  height: auto;
}

.corner-logo-ufpe {
  width: 92px;
}

.corner-logo-kunumi {
  width: 124px;
  transform: translateY(5px);
}

@media (max-width: 960px) {
  .site-shell {
    grid-template-columns: 1fr;
  }

  .site-shell.sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--sidebar-border);
  }

  .sidebar-toggle {
    margin-bottom: 16px;
  }

  .content {
    padding: 32px 22px 48px;
  }

  .page-search {
    position: static;
    margin-bottom: 18px;
    width: 100%;
  }

  .page-search-form {
    justify-content: flex-start;
  }

  .page-search-input {
    width: 220px;
    opacity: 1;
    pointer-events: auto;
  }

  .page-search-clear {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
  }

  .corner-logos {
    right: 14px;
    bottom: 12px;
    gap: 8px;
  }

  .corner-logo-ufpe {
    width: 72px;
  }

  .corner-logo-kunumi {
    width: 98px;
    transform: translateY(3px);
  }
}