/* Biblioteca IA - Leitura Focada v2
   A camada visual nunca altera o documento original. */

.preview-overlay {
  --reader-muted-accessible: #a8b4c8;
  --reader-focus-ring: #38bdf8;
}

.preview-toolbar { flex-wrap: wrap; }
.preview-toolbar-actions { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.preview-mode-button { font-size: .75rem; }
.preview-mode-button[hidden] { display: none !important; }
.preview-mode-button[aria-pressed="true"] {
  border-color: var(--accent);
  background: rgba(0, 212, 255, .14);
  color: var(--accent);
}
.preview-format-help {
  flex: 1 0 100%;
  margin-top: .35rem;
  color: var(--reader-muted-accessible);
  font: 600 .75rem/1.45 "JetBrains Mono", monospace;
}

.preview-overlay :is(button, a, input, select, textarea):focus-visible {
  outline: 3px solid var(--reader-focus-ring);
  outline-offset: 3px;
}

.reader-tools {
  display: none;
  flex: 0 0 auto;
  align-items: center;
  gap: .55rem;
  flex-wrap: wrap;
  padding: .65rem 1rem;
  background: #0b1527;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
}

.reader-mobile-navigation { display: none; }

.preview-overlay.open .reader-tools { display: flex; }
.reader-tools[aria-disabled="true"] .reader-reading-control { opacity: .45; pointer-events: none; }

.reader-tool-group {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  min-height: 40px;
  padding: .25rem .35rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, .025);
}

.reader-tools button,
.reader-tools select,
.reader-tools input {
  min-height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg3);
  color: var(--text);
  font: 700 .72rem/1.1 system-ui, sans-serif;
}

.reader-tools button { cursor: pointer; padding: .55rem .7rem; }
.reader-tools button:hover { border-color: var(--accent); }
.reader-tools button:focus-visible {
  border-color: var(--accent);
  outline: 3px solid var(--reader-focus-ring);
}
.reader-tools button[aria-pressed="true"] { background: var(--accent); color: #06101d; border-color: var(--accent); }
.reader-tools button:disabled { cursor: not-allowed; opacity: .42; }
.reader-tools select { padding: .45rem .55rem; }
.reader-tools input { width: min(220px, 35vw); padding: .5rem .65rem; }
.reader-tools kbd {
  min-width: 1.35rem;
  margin-left: .2rem;
  padding: .12rem .3rem;
  border: 1px solid currentColor;
  border-radius: 4px;
  background: rgba(0, 0, 0, .18);
  font: 800 .68rem/1 system-ui, sans-serif;
}

.reader-shortcut-help {
  flex: 1 0 100%;
  color: var(--reader-muted-accessible);
  font: 600 .75rem/1.45 "JetBrains Mono", monospace;
}

.reader-search-status,
.reader-live-status {
  color: var(--reader-muted-accessible);
  font: 600 .75rem/1.35 "JetBrains Mono", monospace;
}

.reader-live-status { margin-left: auto; max-width: 260px; }
.reader-live-status[data-state="ok"] { color: var(--accent3); }
.reader-live-status[data-state="warn"] { color: var(--gold); }
.reader-live-status[data-state="error"] { color: var(--red); }

.preview-overlay.reader-focused .preview-shell { grid-template-columns: minmax(0, 1fr); }
.preview-overlay.reader-focused .study-panel { display: none; }
.preview-overlay.reader-focused .preview-stage { background: #0b1220; }
.preview-overlay.reader-focused .preview-toolbar { padding-block: .55rem; }

.reader-highlights-panel {
  display: flex;
  flex-direction: column;
  gap: .65rem;
  padding-top: .35rem;
  border-top: 1px solid var(--border);
}

.reader-highlights-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
}

.reader-highlight-count {
  min-width: 1.5rem;
  padding: .15rem .45rem;
  border-radius: 999px;
  background: rgba(0, 212, 255, .12);
  color: var(--accent);
  text-align: center;
  font: 700 .68rem/1.3 "JetBrains Mono", monospace;
}

.reader-highlights-help,
.reader-highlights-empty {
  color: var(--reader-muted-accessible);
  font-size: .75rem;
  line-height: 1.5;
}

.reader-highlights-list { display: grid; gap: .65rem; }

.reader-highlight-card {
  display: grid;
  gap: .5rem;
  padding: .7rem;
  border: 1px solid var(--border);
  border-left: 5px solid var(--highlight-color, #fde047);
  border-radius: 10px;
  background: rgba(255, 255, 255, .025);
}

.reader-highlight-card[data-annotation-kind="underline"] {
  border-left-style: double;
  border-left-width: 7px;
}

.reader-annotation-kind {
  width: max-content;
  padding: .15rem .4rem;
  border: 1px solid var(--highlight-color, #fde047);
  border-radius: 999px;
  background: var(--highlight-color, #fde047);
  color: #102a43;
  font: 800 .62rem/1.2 "JetBrains Mono", monospace;
  text-transform: uppercase;
}

.reader-highlight-quote {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
  color: var(--text);
  font-size: .76rem;
  line-height: 1.5;
}

.reader-highlight-card textarea {
  min-height: 64px;
  margin: 0;
  font-size: .75rem;
}

.reader-highlight-actions { display: flex; flex-wrap: wrap; gap: .4rem; }
.reader-highlight-actions button { min-height: 34px; font-size: .68rem; }

.reader-export-row { display: flex; flex-wrap: wrap; gap: .4rem; }
.reader-export-row .btn { flex: 1; min-width: 88px; justify-content: center; }

@media (max-width: 980px) {
  .reader-live-status { flex: 1 0 100%; max-width: none; }
  .reader-tools input { width: min(250px, 44vw); }
}

@media (max-width: 760px), (max-width: 980px) and (max-height: 600px) {
  .preview-toolbar-actions { width: 100%; }
  .preview-toolbar-actions .btn { min-height: 44px; }
  .reader-mobile-navigation {
    display: grid;
    flex: 0 0 auto;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .4rem;
    padding: .45rem .55rem;
    padding-inline: max(.55rem, env(safe-area-inset-left)) max(.55rem, env(safe-area-inset-right));
    background: #091426;
    border-bottom: 1px solid var(--border);
  }
  .reader-mobile-navigation button {
    min-width: 0;
    min-height: 46px;
    padding: .55rem .35rem;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: var(--bg3);
    color: var(--text);
    font: 800 .72rem/1.15 system-ui, sans-serif;
  }
  .reader-mobile-navigation button:focus-visible {
    border-color: var(--accent);
    outline: 3px solid var(--reader-focus-ring);
    outline-offset: 2px;
  }
  .reader-mobile-navigation button[aria-pressed="true"] {
    border-color: var(--accent);
    background: rgba(0, 212, 255, .16);
    color: var(--accent);
  }
  .preview-overlay.reader-mobile-tools-collapsed .reader-tools { display: none; }
  .reader-tools {
    flex-wrap: nowrap;
    max-height: 86px;
    padding: .55rem;
    padding-inline: max(.55rem, env(safe-area-inset-left)) max(.55rem, env(safe-area-inset-right));
    gap: .4rem;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }
  .reader-tool-group { flex: 0 0 auto; min-height: 44px; }
  .reader-tools button,
  .reader-tools select,
  .reader-tools input { min-height: 44px; font-size: .75rem; }
  .reader-tools input { width: 220px; min-width: 150px; }
  .reader-search-group { flex: 0 0 auto; }
  .reader-shortcut-help { flex: 0 0 330px; }
  .reader-live-status { flex: 0 0 260px; margin-left: 0; }
  .preview-overlay.reader-focused .preview-shell {
    grid-template-rows: minmax(0, 1fr);
    overflow: hidden;
  }
  .preview-overlay.reader-focused .preview-stage {
    height: 100%;
    min-height: 0;
  }
  .preview-overlay.reader-mobile-document .preview-shell,
  .preview-overlay.reader-mobile-study .preview-shell {
    grid-template-rows: minmax(0, 1fr);
    overflow: hidden;
  }
  .preview-overlay.reader-mobile-document .study-panel,
  .preview-overlay.reader-mobile-study .preview-stage { display: none; }
  .preview-overlay.reader-mobile-document .preview-stage,
  .preview-overlay.reader-mobile-study .study-panel {
    display: flex;
    height: 100%;
    min-height: 0;
  }
  .preview-overlay.reader-mobile-study .study-panel {
    overflow-y: auto;
    border-top: 0;
    -webkit-overflow-scrolling: touch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reader-tools *, .reader-highlight-card { transition: none !important; scroll-behavior: auto !important; }
}