/* ---------- Cabeçalho ---------- */
ypos-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  background: color-mix(in srgb, var(--sheet) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1.5px solid var(--rule-strong);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
  min-width: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--brand);
  color: #fff;
  font-size: 20px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  min-width: 0;
}

.brand-text strong {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-text span {
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 21px;
  color: var(--ink-2);
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}

.icon-btn:hover {
  background: var(--brand-soft);
  color: var(--ink);
}

.menu-btn { display: none; }

/* ---------- Pesquisa ---------- */
ypos-search {
  position: relative;
  display: block;
}

.search-field {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 280px;
  height: 40px;
  padding: 0 12px;
  border: 1.5px solid var(--rule);
  border-radius: 10px;
  background: var(--sheet);
  transition: border-color 0.15s, width 0.25s var(--ease);
}

.search-field:focus-within {
  border-color: var(--brand);
}

.search-field .mdi {
  color: var(--ink-3);
  font-size: 18px;
}

.search-field input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 14px;
}

.search-field kbd {
  background: var(--paper);
  color: var(--ink-3);
  border: 1px solid var(--rule);
  font-size: 11px;
}

.search-results {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: min(420px, calc(100vw - 32px));
  max-height: 70vh;
  overflow-y: auto;
  background: var(--sheet);
  border: 1.5px solid var(--rule-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 6px;
  display: none;
}

.search-results.open { display: block; }

.search-results a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  text-decoration: none;
  color: var(--ink);
}

.search-results a[aria-selected="true"],
.search-results a:hover {
  background: var(--brand-soft);
}

.search-results .r-where {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.search-results .r-title {
  font-weight: 600;
  font-size: 14.5px;
}

.search-results .r-snip {
  font-size: 13px;
  color: var(--ink-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-results mark {
  background: var(--accent-soft);
  color: inherit;
  border-radius: 3px;
  box-shadow: inset 0 -2px 0 var(--accent);
}

.search-empty {
  padding: 16px;
  font-size: 14px;
  color: var(--ink-2);
}

/* ---------- Índice lateral ---------- */
ypos-toc {
  position: fixed;
  top: var(--header-h);
  bottom: 0;
  left: 0;
  width: var(--toc-w);
  z-index: 40;
  overflow-y: auto;
  padding: 24px 18px 32px;
  background: var(--sheet);
  border-right: 1.5px solid var(--rule-strong);
  transition: transform 0.3s var(--ease);
}

.toc-progress {
  margin: 0 6px 20px;
  font-size: 12.5px;
  color: var(--ink-2);
}

.toc-progress-bar {
  height: 6px;
  border-radius: 99px;
  background: var(--rule);
  margin-top: 8px;
  overflow: hidden;
}

.toc-progress-bar span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--brand);
  border-radius: inherit;
  transition: width 0.5s var(--ease);
}

.toc-group {
  margin: 18px 6px 6px;
}

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

.toc-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 8px;
  border-radius: 9px;
  text-decoration: none;
  color: var(--ink-2);
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}

.toc-list a:hover {
  background: var(--paper);
  color: var(--ink);
}

.toc-list a[aria-current="page"] {
  background: var(--brand-soft);
  color: var(--ink);
  font-weight: 600;
}

.toc-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  width: 20px;
  flex-shrink: 0;
}

.toc-list a[aria-current="page"] .toc-num {
  color: var(--brand-ink);
}

.toc-title {
  flex: 1;
}

.toc-done {
  color: var(--brand);
  font-size: 15px;
  opacity: 0;
}

.toc-list a.done .toc-done { opacity: 1; }

.toc-scrim {
  display: none;
}

/* ---------- Página ---------- */
.page {
  margin-left: var(--toc-w);
  padding: calc(var(--header-h) + 32px) 40px 64px;
}

.sheet {
  max-width: 1080px;
  margin: 0 auto;
  background: var(--sheet);
  border: 1.5px solid var(--rule-strong);
  border-radius: 4px 4px 22px 4px;
  box-shadow: 8px 8px 0 -1px var(--rule), var(--shadow);
  padding: 48px 56px 36px;
  position: relative;
}

.sheet-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 40px;
  padding-top: 14px;
  border-top: 1px dashed var(--rule);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-enter {
  animation: pageIn 0.45s var(--ease);
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(14px); }
}

/* ---------- Responsivo ---------- */
@media (max-width: 1100px) {
  .page { padding-left: 24px; padding-right: 24px; }
  .sheet { padding: 40px 36px 28px; }
}

@media (max-width: 960px) {
  .menu-btn { display: grid; }

  ypos-toc {
    transform: translateX(-100%);
    box-shadow: var(--shadow);
  }

  ypos-toc.open { transform: none; }

  .toc-scrim.open {
    display: block;
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 39;
  }

  .page { margin-left: 0; }
}

@media (max-width: 720px) {
  ypos-header { padding: 0 12px; gap: 6px; }
  .brand-text span { display: none; }
  .search-field { width: 40px; padding: 0 10px; border-color: transparent; background: transparent; }
  .search-field input, .search-field kbd { display: none; }
  ypos-search.expanded { position: absolute; left: 12px; right: 12px; }
  ypos-search.expanded .search-field { width: 100%; background: var(--sheet); border-color: var(--brand); }
  ypos-search.expanded .search-field input { display: block; }
  .page { padding: calc(var(--header-h) + 16px) 16px 40px; }
  .sheet { padding: 28px 18px 20px; border-radius: 4px 4px 16px 4px; box-shadow: 5px 5px 0 -1px var(--rule), var(--shadow); }
  body { font-size: 15px; }
}