/* ── File viewer page ───────────────────────────────────────────────────────── */

.fv-page {
  flex-direction: column;
  min-height: 0;
}

.fv-title {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.95rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 0.9;
  margin: 0;
  /* RTL flips the ellipsis to the *start*, so a long path keeps its tail (the
     filename) visible — `<bdi>` around the path preserves left-to-right order. */
  direction: rtl;
  text-align: left;
  flex: 1 1 auto;
  min-width: 0;
}

.fv-download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0 !important;
  border-radius: 6px !important;
  flex-shrink: 0;
}

.fv-body {
  flex: 1 1 auto;
  overflow: auto;
  position: relative;
  min-height: 0;
}

.fv-state {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
}

/* ── Markdown preview ────────────────────────────────────────────────────────── */

.fv-md-wrap {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

/* View | Edit tab bar — shown only when the caller can write the file. */
.fv-md-tabs {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.4rem 1rem 0;
  border-bottom: 1px solid var(--bs-border-color);
  flex-shrink: 0;
}
.fv-md-tab {
  appearance: none;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.35rem 0.85rem;
  margin-bottom: -1px;
  font-size: 0.85rem;
  color: var(--bs-secondary-color);
  cursor: pointer;
  border-radius: 4px 4px 0 0;
}
.fv-md-tab:hover { color: var(--bs-body-color); }
.fv-md-tab.active {
  color: var(--bs-body-color);
  border-bottom-color: var(--accent);
  font-weight: 600;
}
.fv-md-dirty-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: 0.35rem;
  flex-shrink: 0;
}

/* ── Source editor (Edit tab) ───────────────────────────────────────────────── */

.fv-edit {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 0.75rem 1rem 1rem;
  gap: 0.5rem;
}
.fv-edit-textarea {
  flex: 1 1 auto;
  min-height: 50vh;
  width: 100%;
  resize: vertical;
  padding: 0.85rem 1rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  tab-size: 4;
  color: var(--bs-body-color);
  background: var(--bs-secondary-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: 6px;
  white-space: pre;
  overflow-wrap: normal;
  overflow: auto;
}
.fv-edit-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
}
.fv-edit-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.fv-edit-hint {
  font-size: 0.78rem;
  color: var(--bs-secondary-color);
  margin-left: auto;
}

/* ── Conflict banner (remote changed while editing) ─────────────────────────── */

.fv-conflict-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.85rem;
  background: var(--bs-warning-bg-subtle, #fff3cd);
  border: 1px solid var(--bs-warning-border-subtle, #ffe69c);
  color: var(--bs-emphasis-color, inherit);
  border-radius: 6px;
  flex-shrink: 0;
}
.fv-conflict-banner > .bi {
  color: var(--bs-warning-text-emphasis, #664d03);
  font-size: 1.05rem;
  flex-shrink: 0;
}
.fv-conflict-text {
  flex: 1 1 200px;
  font-size: 0.82rem;
  min-width: 0;
}
.fv-conflict-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  flex-shrink: 0;
}

.fv-md {
  max-width: 100%;
  padding: 1.5rem 2rem;
  line-height: 1.6;
  font-size: 0.8rem;
}

.fv-md > *:first-child { margin-top: 0; }
.fv-md > *:last-child  { margin-bottom: 0; }

.fv-md h1,
.fv-md h2,
.fv-md h3,
.fv-md h4 { margin: 1.2rem 0 0.5rem; line-height: 1.3; }
.fv-md h1 { font-size: 1.5em; }
.fv-md h2 { font-size: 1.3em; }
.fv-md h3 { font-size: 1.15em; }
.fv-md h4 { font-size: 1em; }

.fv-md p      { margin: 0.5rem 0; }
.fv-md ul,
.fv-md ol     { margin: 0.5rem 0; padding-left: 1.5rem; }
.fv-md li     { margin: 0.2rem 0; }

.fv-md code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--bs-secondary-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}

.fv-md pre {
  background: var(--bs-secondary-bg);
  padding: 0.85rem 1rem;
  border-radius: 6px;
  overflow: auto;
  margin: 0.75rem 0;
}
.fv-md pre code { background: none; padding: 0; font-size: inherit; }

.fv-md blockquote {
  border-left: 3px solid var(--bs-border-color);
  margin: 0.75rem 0;
  padding: 0.25rem 0 0.25rem 1rem;
  color: var(--bs-secondary-color);
}

.fv-md hr  { border: none; border-top: 1px solid var(--bs-border-color); margin: 1.25rem 0; }
.fv-md a   { color: var(--accent); text-decoration: underline; }
.fv-md strong { font-weight: 700; }
.fv-md em     { font-style: italic; }

.fv-md img  { max-width: 100%; border-radius: 4px; }

.fv-md table {
  border-collapse: collapse;
  margin: 0.75rem 0;
}
.fv-md th,
.fv-md td {
  border: 1px solid var(--bs-border-color);
  padding: 0.4rem 0.6rem;
}

/* ── Code/text preview ───────────────────────────────────────────────────────── */

.fv-code {
  margin: 0;
  padding: 1.25rem 1.5rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  white-space: pre;
  overflow: auto;
  background: var(--bs-secondary-bg);
  color: var(--bs-body-color);
  min-height: 100%;
  tab-size: 4;
}

/* Header action buttons (mode toggle + download) sit in one row. */
.fv-header-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

/* ── PDF preview ─────────────────────────────────────────────────────────────── */

/* PDFs are drawn by <pdf-view> (web/components/shared/pdf-view.js) on canvas, not
   handed to the browser's built-in viewer: WebKit paints only a static first page
   inside a frame — which is why iOS showed page 1 and nothing else — and the
   desktop browsers each mount a different viewer chrome. `.fv-pdf` is the block
   the viewer body gives it; everything below is that component's own layout. */
.fv-pdf {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
}

.pdfv {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

.pdfv-toolbar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.6rem;
  border-bottom: 1px solid var(--bs-border-color);
  background: var(--bs-tertiary-bg);
  flex-shrink: 0;
}

.pdfv-btn {
  border: 1px solid var(--bs-border-color);
  background: var(--bs-body-bg);
  color: var(--bs-body-color);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.5rem;
  line-height: 1.4;
  cursor: pointer;
}

.pdfv-btn:hover:not(:disabled) { background: var(--bs-secondary-bg); }
.pdfv-btn:disabled             { opacity: 0.4; cursor: default; }

.pdfv-zoom {
  min-width: 3.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--bs-secondary-color);
  font-variant-numeric: tabular-nums;
}

.pdfv-pageno {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--bs-secondary-color);
  font-variant-numeric: tabular-nums;
}

/* The scroll root. `position: relative` makes it the offsetParent of every page
   box, which is what lets the component compare `offsetTop` against `scrollTop`
   when it decides which pages hold pixels. */
.pdfv-scroll {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  background: var(--bs-secondary-bg);
}

/* `width: max-content` + `min-width: 100%` is what makes zoom usable: with a
   plain `align-items: center`, a page wider than the scroll box overflows on
   *both* sides and the left half becomes unreachable — centring happens before
   scrolling exists. Growing this box to the widest page instead gives an honest
   horizontal scroll range, while min-width keeps pages centred when they fit. */
.pdfv-pages {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: max-content;
  min-width: 100%;
  gap: 0.6rem;
  padding: 0.6rem;
}

/* A page box is sized before it is drawn, so the scrollbar is honest from the
   start and a page that is currently released leaves no gap. The pdf.js text
   layer positions itself against these CSS variables. */
.pdfv-page {
  position: relative;
  background: #fff;
  box-shadow: 0 1px 6px rgb(0 0 0 / 0.35);
  overflow: hidden;
  --user-unit: 1;
  --total-scale-factor: calc(var(--scale-factor) * var(--user-unit));
  --scale-round-x: 1px;
  --scale-round-y: 1px;
}

.pdfv-canvas {
  display: block;
}

.pdfv-page-failed::after {
  content: "!";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bs-danger, #b91c1c);
  font-size: 2rem;
}

.pdfv-error-detail {
  margin-top: 0.4rem;
  font-size: 0.8rem;
  opacity: 0.75;
  word-break: break-word;
}

/* ── HTML live preview ───────────────────────────────────────────────────────── */

/* Rendered in an origin-isolated iframe (srcdoc + sandbox="allow-scripts").
   White canvas so pages that don't set their own background stay legible. */
.fv-html {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
  background: #fff;
}

/* ── LaTeX compile-error banner (shown above the source fallback) ─────────────── */

.fv-compile-error {
  margin: 0;
  padding: 0.5rem 1.5rem;
  background: var(--bs-warning-bg-subtle, #fff3cd);
  border-bottom: 1px solid var(--bs-border-color);
  font-size: 0.85rem;
}
.fv-compile-error > summary {
  cursor: pointer;
  user-select: none;
  padding: 0.25rem 0;
}
.fv-compile-error > pre {
  margin: 0.5rem 0 0.75rem;
  padding: 0.75rem 1rem;
  max-height: 40vh;
  overflow: auto;
  background: var(--bs-secondary-bg);
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.8rem;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── Image preview ───────────────────────────────────────────────────────────── */

.fv-image-wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--bs-secondary-bg);
}

.fv-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

/* SVG renders in a sandboxed iframe; the SVG root fills the iframe viewport and
   scales to its viewBox. White canvas so light-on-transparent SVGs stay legible. */
.fv-svg {
  width: 100%;
  height: 100%;
  border: none;
  background: #fff;
  border-radius: 4px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}