.fb-modal {
  position: fixed; inset: 0; z-index: 1100;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.28s var(--ease);
}
.fb-modal.open { opacity: 1; pointer-events: all; }

/* File browser sits above the org modal */
#fb-modal { z-index: 1150; }

.fb-backdrop {
  position: absolute; inset: 0;
  background: var(--backdrop);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.fb-panel {
  position: relative; z-index: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  width: min(1020px, 100%);
  height: min(680px, 86svh);
  display: flex; flex-direction: column;
  box-shadow: 0 24px 60px var(--shadow-panel);
  transform: translateY(12px);
  transition: transform 0.32s var(--ease);
  overflow: hidden;
}
.fb-modal.open .fb-panel { transform: translateY(0); }

/* Desktop split — files left, readme right */
.fb-split { flex: 1; display: flex; overflow: hidden; min-height: 0; }

.fb-file-list {
  flex: 0 0 320px;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  min-height: 0;
}

.fb-readme-pane {
  flex: 1;
  overflow-y: auto;
  padding: 0;
  min-height: 0;
  font-size: 0.84rem;
  display: none;
}

.fb-readme-pane.has-content,
.fb-readme-pane.fb-readme-loading {
  display: block;
  border-left: 1px solid var(--border);
}

.fb-readme-body { padding: 20px 24px; }

/* Tab bar — mobile only */
.fb-tab-bar {
  display: none;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.fb-tab {
  flex: 1;
  padding: 10px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  font-family: 'Geist Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.fb-tab:hover { color: var(--text); }
.fb-tab.active { color: var(--text); border-bottom-color: var(--red); }

/* Mobile — bottom sheet, full height, tabbed */
@media (max-width: 720px) {
  .fb-modal { align-items: flex-end; padding: 0; }
  .fb-panel { border-radius: 0; width: 100%; height: 92svh; }
  .fb-tab-bar { display: flex; }
  .fb-split { flex-direction: column; }
  /* Files pane fills all available space */
  .fb-file-list { flex: 1; border-right: none; min-height: 0; overflow-y: auto; }
  /* Readme hidden by default on mobile — JS toggles via show-readme class on split */
  .fb-readme-pane,
  .fb-readme-pane.has-content,
  .fb-readme-pane.fb-readme-loading { display: none; }
  .fb-split.show-readme .fb-file-list { display: none; }
  .fb-split.show-readme .fb-readme-pane { display: block !important; flex: 1; overflow-y: auto; border-top: 1px solid var(--border); }
}

/* Back button — shown when file browser was opened from an org */
.fb-back-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-sub);
  font-family: 'Geist Mono', monospace;
  font-size: 0.72rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
  margin-right: 2px;
}
.fb-back-btn:hover { color: var(--red); border-color: var(--red); }

/* Header */
.fb-header {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.fb-repo-icon { color: var(--red); flex-shrink: 0; }
.fb-repo-name {
  font-family: 'Instrument Serif', serif;
  font-size: 1rem; font-weight: 400;
  color: var(--text); flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.fb-gh-link {
  display: flex; align-items: center; gap: 5px;
  font-family: 'Geist Mono', monospace;
  font-size: 0.72rem; color: var(--text-dim);
  text-decoration: none; padding: 4px 9px;
  border-radius: 2px; border: 1px solid var(--border);
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap; flex-shrink: 0;
}
.fb-gh-link:hover { color: var(--red); border-color: var(--red); }
.fb-close {
  width: 28px; height: 28px;
  border-radius: 2px;
  background: var(--surface2); border: 1px solid var(--border);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  color: var(--text-sub); flex-shrink: 0;
  transition: border-color 0.2s, color 0.2s;
}
.fb-close:hover { border-color: var(--red); color: var(--red); }

/* Commit strip */
.fb-commit-strip {
  padding: 7px 18px; border-bottom: 1px solid var(--border);
  background: var(--surface2); min-height: 34px;
  display: flex; align-items: center; flex-shrink: 0;
}
[data-theme="dark"] .fb-commit-strip { background: var(--bg); }
.fb-strip-link {
  display: flex; align-items: center; gap: 7px;
  text-decoration: none; color: var(--text-sub);
  font-size: 0.75rem; width: 100%; min-width: 0;
  transition: color 0.2s;
}
.fb-strip-link:hover { color: var(--red); }
.fb-strip-sha {
  font-family: 'Geist Mono', monospace;
  background: var(--surface); padding: 1px 5px;
  border-radius: 2px; border: 1px solid var(--border);
  font-size: 0.68rem; color: var(--red); flex-shrink: 0;
}
.fb-strip-msg {
  flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--text); font-weight: 500;
}
.fb-strip-meta {
  font-family: 'Geist Mono', monospace; font-size: 0.68rem;
  color: var(--text-dim); white-space: nowrap; flex-shrink: 0;
}

/* Breadcrumbs */
.fb-breadcrumbs {
  display: flex; align-items: center; gap: 0;
  padding: 8px 18px; border-bottom: 1px solid var(--border);
  flex-shrink: 0; overflow-x: auto; white-space: nowrap;
}
.fb-crumb {
  font-family: 'Geist Mono', monospace; font-size: 0.75rem;
  color: var(--red); background: none; border: none; cursor: pointer;
  padding: 2px 5px; border-radius: 2px; transition: background 0.15s;
}
.fb-crumb:hover { background: var(--surface2); }
.fb-crumb-root { font-weight: 500; }
.fb-crumb-sep { color: var(--text-dim); font-size: 0.75rem; padding: 0 1px; user-select: none; }

/* File list */
.fb-list { display: flex; flex-direction: column; }
.fb-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 18px;
  cursor: pointer; border-bottom: 1px solid var(--border);
  transition: background 0.15s; min-width: 0;
}
.fb-row:last-child { border-bottom: none; }
.fb-row:hover { background: var(--surface2); }
.fb-row:focus-visible { outline: 2px solid var(--red); outline-offset: -2px; }
.fb-icon { flex-shrink: 0; display: flex; align-items: center; color: var(--red); }
.fb-row-file .fb-icon { color: var(--text-dim); }
.fb-name {
  flex: 1; font-family: 'Geist Mono', monospace;
  font-size: 0.83rem; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0;
}
.fb-row-hint {
  font-family: 'Geist Mono', monospace; font-size: 0.67rem;
  color: var(--text-dim); white-space: nowrap; flex-shrink: 0;
}
.fb-row-arrow {
  color: var(--text-dim); flex-shrink: 0;
  opacity: 0; transition: opacity 0.15s, transform 0.15s;
}
.fb-row:hover .fb-row-arrow { opacity: 1; transform: translateX(2px); }

.fb-loading { display: flex; flex-direction: column; gap: 1px; padding: 8px 18px; }
.fb-loading-row { height: 40px; border-radius: 2px; }

.fb-empty {
  text-align: center; padding: 40px 20px;
  color: var(--text-dim); font-size: 0.85rem;
}
.fb-empty a { color: var(--red); text-decoration: none; }

.fb-ext-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--text-dim); text-decoration: none;
  font-family: 'Geist Mono', monospace; font-size: 0.73rem;
  transition: color 0.2s;
}
.fb-ext-link:hover { color: var(--red); }

/* README */
.fb-readme-header {
  display: flex; align-items: center; gap: 7px;
  padding: 0 0 10px;
  font-family: 'Geist Mono', monospace; font-size: 0.68rem;
  color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.1em;
}
/* ── README content ── */
.fb-readme-body {
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--text-sub);
  padding: 20px 24px;
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Headings */
.fb-readme-h1, .fb-readme-h2, .fb-readme-h3,
.fb-readme-h4, .fb-readme-h5, .fb-readme-h6 {
  font-family: 'Instrument Serif', serif;
  color: var(--text);
  margin: 20px 0 8px;
  line-height: 1.3;
}
.fb-readme-h1 { font-size: 1.6rem; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.fb-readme-h2 { font-size: 1.3rem; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.fb-readme-h3 { font-size: 1.1rem; }
.fb-readme-h4 { font-size: 0.95rem; }
.fb-readme-h5 { font-size: 0.88rem; }
.fb-readme-h6 { font-size: 0.82rem; color: var(--text-dim); }

/* Paragraphs */
.fb-readme-p { margin: 0 0 12px; }

/* Links */
.fb-readme-link { color: var(--red); text-decoration: none; }
.fb-readme-link:hover { text-decoration: underline; }

/* Code */
.fb-readme-pre {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 10px 0 14px;
  font-size: 0.78rem;
  line-height: 1.6;
}
.fb-readme-pre code { font-family: 'Geist Mono', monospace; background: none; padding: 0; }
.fb-readme-code {
  font-family: 'Geist Mono', monospace;
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 2px;
  font-size: 0.84em;
}

/* Lists */
.fb-readme-list {
  padding-left: 20px;
  margin: 4px 0 12px;
}
.fb-readme-list li { margin-bottom: 4px; }
.fb-readme-list .fb-readme-list { margin: 4px 0; }

/* Task list */
.fb-readme-task {
  margin-right: 6px;
  vertical-align: middle;
  accent-color: var(--red);
}

/* Blockquote */
.fb-readme-blockquote {
  border-left: 3px solid var(--border);
  margin: 10px 0 14px;
  padding: 6px 14px;
  color: var(--text-dim);
  font-style: italic;
}

/* HR */
.fb-readme-hr { border: none; border-top: 1px solid var(--border); margin: 18px 0; }

/* Badges / shield images */
.fb-readme-badge {
  display: inline-block;
  vertical-align: middle;
  max-height: 24px;
  margin: 2px 3px 2px 0;
}

/* Tables */
.fb-readme-table-wrap { overflow-x: auto; margin: 10px 0 14px; }
.fb-readme-table {
  border-collapse: collapse;
  font-size: 0.84rem;
  min-width: 100%;
}
.fb-readme-table th,
.fb-readme-table td {
  padding: 7px 14px;
  border: 1px solid var(--border);
  text-align: left;
}
.fb-readme-table th {
  background: var(--surface2);
  font-family: 'Geist Mono', monospace;
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
}
.fb-readme-table tr:nth-child(even) td { background: var(--surface2); }

/* GFM alert blocks */
.gfm-alert {
  border-left: 3px solid;
  border-radius: 0 2px 2px 0;
  padding: 10px 14px;
  margin: 12px 0 16px;
  font-size: 0.84rem;
}
.gfm-alert-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Geist Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.gfm-alert-body { color: var(--text-sub); line-height: 1.6; }

.gfm-alert-note    { border-color: #4493f8; background: rgba(68,147,248,0.06); }
.gfm-alert-note    .gfm-alert-title { color: #4493f8; }
.gfm-alert-tip     { border-color: #3fb950; background: rgba(63,185,80,0.06); }
.gfm-alert-tip     .gfm-alert-title { color: #3fb950; }
.gfm-alert-important { border-color: #a371f7; background: rgba(163,113,247,0.06); }
.gfm-alert-important .gfm-alert-title { color: #a371f7; }
.gfm-alert-warning { border-color: #d29922; background: rgba(210,153,34,0.06); }
.gfm-alert-warning .gfm-alert-title { color: #d29922; }
.gfm-alert-caution { border-color: #f85149; background: rgba(248,81,73,0.06); }
.gfm-alert-caution .gfm-alert-title { color: #f85149; }

@media (max-width: 480px) { .fb-row-hint { display: none; } }