/* Pinion.md - style.css
 *
 * Build with Baker tool 2. Indigo-only brand discipline per
 * project-blueprints/build-with-baker/future-enhancements/indigo-only-decision-2026-05-23.md
 * Tokens inherited verbatim from shared/palette.css v1.4 (inlined for portability;
 * GitHub Pages serves files as-is and cannot import a sibling repo).
 *
 * The three --reader-* tokens are a Pinion.md-local exception: a muted neutral
 * surface ramp tuned for extended-viewing eye comfort. Candidate to formalize
 * in shared/palette.css post-v1.
 */

:root {
  --bwb-brand-primary:        #2B4A8B;
  --bwb-brand-primary-hover:  #243F76;
  --bwb-brand-primary-soft:   #E8EDF7;

  --bwb-surface-base:         #F4F6FA;
  --bwb-surface-elevated:     #FFFFFF;
  --bwb-border-subtle:        #E1E6EE;
  --bwb-border-strong:        #C2CAD6;

  --bwb-text-primary:         #0F1A2E;
  --bwb-text-secondary:       #445063;
  --bwb-text-muted:           #5E6678;
  --bwb-text-inverse:         #FFFFFF;

  --bwb-status-success:       #2E7D5B;
  --bwb-status-warning:       #B5851A;
  --bwb-status-danger:        #B82F2F;
  --bwb-status-info:          #3A6FA8;

  --accent:                   var(--bwb-brand-primary);
  --accent-hover:             var(--bwb-brand-primary-hover);
  --accent-soft:              var(--bwb-brand-primary-soft);

  --reader-surface:           #E5E7EB;
  --reader-card:              #EEF0F3;
  --reader-card-input:        #F5F6F8;

  --header-h:   56px;
  --footer-h:   36px;
  --radius:     8px;
  --radius-sm:  4px;
  --gutter:     20px;

  --font-sans:  'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --card-shadow: 0 0 0 1px var(--accent);

  /* v1.6 dark palette — single source of dark color VALUES. The two dark
   * triggers below only REMAP the live tokens to these, so values never drift.
   * Indigo-only holds: the accent lifts to #7FA0E8 (BwB dark-mode accent), no
   * second hue. Near-black indigo-tinted ramp, never pure #000/#fff. */
  --dk-surface:        #11151C;
  --dk-card:           #171C26;
  --dk-card-input:     #1F2632;
  --dk-text-primary:   #E7EBF2;
  --dk-text-secondary: #AEB7C6;
  --dk-text-muted:     #8A93A4;
  --dk-text-inverse:   #0F1A2E;   /* dark text reads better on the lifted indigo */
  --dk-border-subtle:  #2A3340;
  --dk-border-strong:  #3A4555;
  --dk-accent:         #7FA0E8;
  --dk-accent-hover:   #9DB6EF;
  --dk-accent-soft:    #21304A;
  --dk-surface-base:   #0D1118;
  --dk-surface-elev:   #171C26;
  --dk-success:        #4CAF82;
  --dk-warning:        #D6A93E;
  --dk-danger:         #E06B6B;
  --dk-info:           #6B9BD6;
}

/* v1.6 Dark mode. JS sets data-theme to the RESOLVED appearance, so the forced
 * selector covers both explicit-dark and system-dark once JS runs; the @media
 * block gives system-preferring users the right theme pre-JS (zero flash). The
 * remap is duplicated but references --dk-* so the actual values live once. */
html[data-theme="dark"] {
  --bwb-brand-primary:  var(--dk-accent);
  --bwb-brand-primary-hover: var(--dk-accent-hover);
  --bwb-brand-primary-soft:  var(--dk-accent-soft);
  --bwb-surface-base:   var(--dk-surface-base);
  --bwb-surface-elevated: var(--dk-surface-elev);
  --bwb-border-subtle:  var(--dk-border-subtle);
  --bwb-border-strong:  var(--dk-border-strong);
  --bwb-text-primary:   var(--dk-text-primary);
  --bwb-text-secondary: var(--dk-text-secondary);
  --bwb-text-muted:     var(--dk-text-muted);
  --bwb-text-inverse:   var(--dk-text-inverse);
  --bwb-status-success: var(--dk-success);
  --bwb-status-warning: var(--dk-warning);
  --bwb-status-danger:  var(--dk-danger);
  --bwb-status-info:    var(--dk-info);
  --accent:             var(--dk-accent);
  --accent-hover:       var(--dk-accent-hover);
  --accent-soft:        var(--dk-accent-soft);
  --reader-surface:     var(--dk-surface);
  --reader-card:        var(--dk-card);
  --reader-card-input:  var(--dk-card-input);
}
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]):not([data-theme="dark"]) {
    --bwb-brand-primary:  var(--dk-accent);
    --bwb-brand-primary-hover: var(--dk-accent-hover);
    --bwb-brand-primary-soft:  var(--dk-accent-soft);
    --bwb-surface-base:   var(--dk-surface-base);
    --bwb-surface-elevated: var(--dk-surface-elev);
    --bwb-border-subtle:  var(--dk-border-subtle);
    --bwb-border-strong:  var(--dk-border-strong);
    --bwb-text-primary:   var(--dk-text-primary);
    --bwb-text-secondary: var(--dk-text-secondary);
    --bwb-text-muted:     var(--dk-text-muted);
    --bwb-text-inverse:   var(--dk-text-inverse);
    --bwb-status-success: var(--dk-success);
    --bwb-status-warning: var(--dk-warning);
    --bwb-status-danger:  var(--dk-danger);
    --bwb-status-info:    var(--dk-info);
    --accent:             var(--dk-accent);
    --accent-hover:       var(--dk-accent-hover);
    --accent-soft:        var(--dk-accent-soft);
    --reader-surface:     var(--dk-surface);
    --reader-card:        var(--dk-card);
    --reader-card-input:  var(--dk-card-input);
  }
}

* { box-sizing: border-box; }

/* Respect the [hidden] attribute even when component CSS sets display. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--reader-surface);
  color: var(--bwb-text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* App shell */

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
}

/* Header */

.header {
  height: var(--header-h);
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  padding: 0 var(--gutter);
  background: var(--reader-surface);
  border-bottom: 2px solid var(--accent);
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--bwb-text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.brand .feather {
  width: 22px;
  height: 22px;
  color: var(--accent);
}
.brand .wordmark { display: inline-flex; align-items: baseline; }
.brand .wordmark .name { color: var(--bwb-text-primary); }
.brand .wordmark .ext  { color: var(--accent); font-weight: 700; }

.filename-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--reader-card);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 600;
  font-family: var(--font-mono);
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.filename-badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--bwb-status-success);
  flex: 0 0 6px;
}
.filename-badge.dirty .dot { background: var(--bwb-status-warning); }

.header-spacer { flex: 1 1 auto; }

.seg-control {
  display: inline-flex;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 2px;
  background: var(--reader-card);
}
.seg-control button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--bwb-text-secondary);
  font: inherit;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 3px;
  cursor: pointer;
  transition: color 80ms ease, background 80ms ease;
}
.seg-control button.active {
  background: var(--accent);
  color: var(--bwb-text-inverse);
  font-weight: 600;
}
.seg-control button:not(.active):hover {
  color: var(--accent);
}
.seg-control button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn {
  appearance: none;
  border: 0;
  background: var(--accent);
  color: var(--bwb-text-inverse);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 80ms ease;
}
.btn:hover { background: var(--accent-hover); }
.btn .icon { width: 14px; height: 14px; }

.btn-lg {
  font-size: 14px;
  padding: 10px 20px;
}
.btn-lg .icon { width: 16px; height: 16px; }

/* Secondary action button: indigo outline, no fill, becomes accent-soft on hover.
 * Used by the in-app PWA Install affordance so it reads below the primary
 * "Open file" CTA in the header. */
.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  /* Compensate for the 1px border so the height matches .btn exactly. */
  padding: 6px 13px;
}
.btn-ghost:hover {
  background: var(--accent-soft);
  color: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* v1.6 icon-only ghost button (theme toggle): square, just the glyph. */
.btn-icon {
  padding: 6px;
  width: 32px;
  justify-content: center;
}
.btn-icon .theme-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-icon .icon { width: 16px; height: 16px; }

/* Body: view-mode driven layout */

.body {
  flex: 1 1 auto;
  display: grid;
  overflow: hidden;
  background: var(--reader-surface);
  gap: 16px;
  padding: 16px;
  min-height: 0;
}

.body[data-view="landing"] {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
}
.body[data-view="landing"] .pane { display: none; }
.body[data-view="landing"] .landing { display: flex; }

.body[data-view="preview"],
.body[data-view="edit"] {
  grid-template-columns: 1fr;
}
.body[data-view="split"] {
  grid-template-columns: 1fr 1fr;
}

.body:not([data-view="landing"]) .landing { display: none; }

.body[data-view="preview"] .pane-source { display: none; }
.body[data-view="edit"] .pane-preview { display: none; }

/* Landing */

.landing {
  display: none;
  align-items: center;
  justify-content: center;
  width: 100%;
}
.landing-card {
  background: var(--reader-card);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 48px 56px;
  max-width: 520px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.landing-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: linear-gradient(
    90deg,
    #5C7EC5 0%,
    var(--accent) 50%,
    var(--accent-hover) 100%
  );
}
.landing-feather {
  width: 56px;
  height: 56px;
  color: var(--accent);
  margin-bottom: 12px;
}
.landing-title {
  margin: 0 0 8px;
  font-size: 32px;
  font-weight: 700;
  color: var(--bwb-text-primary);
  letter-spacing: -0.02em;
}
.landing-title .landing-ext {
  color: var(--accent);
  font-weight: 700;
}
.landing-desc {
  margin: 0 0 24px;
  color: var(--bwb-text-secondary);
  font-size: 15px;
}
.landing-desc code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--reader-card-input);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
}
.landing-note {
  margin: 16px 0 0;
  color: var(--bwb-text-muted);
  font-size: 12.5px;
}
.landing-unsupported {
  margin: 12px 0 0;
  color: var(--bwb-status-warning);
  font-size: 12.5px;
}

/* v1.3: Recent files list on the landing card */
.recent {
  margin: 24px 0 0;
  text-align: left;
  border-top: 1px solid var(--bwb-border-subtle);
  padding-top: 16px;
}
.recent-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.recent-label {
  color: var(--accent);
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.recent-clear {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--bwb-text-muted);
  font: inherit;
  font-size: 11.5px;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
}
.recent-clear:hover { color: var(--accent); }
.recent-clear:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.recent-list { list-style: none; margin: 0; padding: 0; }
.recent-item {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
}
.recent-open {
  appearance: none;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--bwb-text-secondary);
  font: inherit;
  font-size: 13.5px;
  text-align: left;
  padding: 7px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.recent-open:hover { background: var(--reader-card-input); color: var(--accent); }
.recent-open:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.recent-icon { width: 15px; height: 15px; color: var(--accent); flex: 0 0 15px; }
.recent-name {
  font-family: var(--font-mono);
  font-size: 12.5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.recent-remove {
  appearance: none;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  padding: 5px;
  border: 0;
  background: transparent;
  color: var(--bwb-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0;
  transition: opacity 100ms ease, color 80ms ease;
}
.recent-item:hover .recent-remove,
.recent-remove:focus-visible { opacity: 1; }
.recent-remove:hover { color: var(--bwb-status-danger); }
.recent-remove:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.recent-remove svg { width: 14px; height: 14px; }
@media (hover: none) { .recent-remove { opacity: 1; } }

/* v1.3: "file changed on disk" banner (dirty-buffer case; clean reloads silently) */
.changed-bar {
  position: fixed;
  bottom: calc(var(--footer-h) + 16px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 120;
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 90vw;
  padding: 10px 14px 10px 18px;
  background: var(--bwb-text-primary);
  color: var(--bwb-text-inverse);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--bwb-status-warning);
  box-shadow: 0 4px 16px rgba(15, 26, 46, 0.25);
  font-size: 13px;
}
.changed-actions { display: inline-flex; gap: 8px; flex: 0 0 auto; }
.changed-btn {
  appearance: none;
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
}
.changed-reload {
  background: var(--accent);
  color: var(--bwb-text-inverse);
  border-color: var(--accent);
}
.changed-reload:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.changed-dismiss {
  background: transparent;
  color: var(--bwb-text-inverse);
  border-color: rgba(255, 255, 255, 0.35);
}
.changed-dismiss:hover { border-color: rgba(255, 255, 255, 0.7); }
.changed-btn:focus-visible { outline: 2px solid var(--bwb-text-inverse); outline-offset: 2px; }

/* Panes */

.pane {
  position: relative;
  overflow: hidden;
  background: var(--reader-card);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.pane::before {
  content: "";
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 5px;
  background: linear-gradient(
    180deg,
    #5C7EC5 0%,
    var(--accent) 35%,
    var(--accent-hover) 100%
  );
  z-index: 2;
  pointer-events: none;
}

.pane-scroll {
  overflow: auto;
  flex: 1 1 auto;
  min-height: 0;
}

.pane-header {
  flex: 0 0 auto;
  background: var(--reader-surface);
  padding: 10px 16px 10px 21px;
  border-bottom: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 36px;
}
.pane-header .ph-left {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
}
.pane-header .ph-icon {
  width: 14px;
  height: 14px;
  color: var(--accent);
  stroke-width: 2.25;
}
.pane-header .ph-divider {
  width: 1px;
  height: 12px;
  background: var(--accent);
  opacity: 0.4;
}
.pane-header .ph-right {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--bwb-text-muted);
  letter-spacing: 0.02em;
}
.pane-header .ph-right .meta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.pane-header .ph-right .meta .val {
  color: var(--bwb-text-secondary);
  font-weight: 600;
}
.pane-header .ph-pill {
  display: inline-flex;
  align-items: center;
  background: var(--accent);
  color: var(--bwb-text-inverse);
  padding: 2px 7px;
  border-radius: 3px;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--font-sans);
}
.pane-header .ph-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--bwb-status-success);
  box-shadow: 0 0 0 2px var(--reader-surface);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

/* Source pane: textarea editor */

.source-editor {
  display: block;
  width: 100%;
  min-height: 100%;
  margin: 0;
  padding: 20px var(--gutter) 20px 25px;
  border: 0;
  background: transparent;
  resize: none;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--bwb-text-secondary);
  white-space: pre-wrap;
  tab-size: 2;
  outline: none;
}
.source-editor:focus-visible {
  outline: none;
}
.pane-source:focus-within {
  box-shadow: 0 0 0 2px var(--accent);
}

/* Preview pane content */

.pane-preview .pane-scroll { padding-left: 0; }
.preview-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px var(--gutter) 60px;
}
.preview-content > * + * { margin-top: 18px; }
.preview-content h1,
.preview-content h2,
.preview-content h3,
.preview-content h4,
.preview-content h5,
.preview-content h6 {
  line-height: 1.25;
  letter-spacing: -0.015em;
}
.preview-content h1 {
  color: var(--accent);
  font-size: 32px;
  font-weight: 700;
  margin-top: 0;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--accent);
}
.preview-content h2 {
  color: var(--accent);
  font-size: 22px;
  font-weight: 600;
  margin-top: 36px;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
}
.preview-content h3 {
  color: var(--accent-hover);
  font-size: 17px;
  font-weight: 600;
  margin-top: 24px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.preview-content h4 {
  color: var(--bwb-text-secondary);
  font-size: 14px;
  font-weight: 600;
  margin-top: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.preview-content h5,
.preview-content h6 {
  color: var(--bwb-text-secondary);
  font-size: 13px;
  font-weight: 600;
  margin-top: 16px;
}
.preview-content p { color: var(--bwb-text-primary); }
.preview-content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-soft);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: text-decoration-color 80ms ease;
}
.preview-content a:hover {
  text-decoration-color: var(--accent);
  color: var(--accent-hover);
}
.preview-content strong { color: var(--bwb-text-primary); font-weight: 700; }
.preview-content em { color: var(--bwb-text-primary); font-style: italic; }
.preview-content del { color: var(--bwb-text-muted); text-decoration: line-through; }

.preview-content blockquote {
  margin: 0;
  padding: 14px 18px;
  border-left: 4px solid var(--accent);
  background: var(--reader-surface);
  color: var(--bwb-text-secondary);
  font-style: italic;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.preview-content blockquote > * { color: var(--bwb-text-secondary); }
.preview-content blockquote p:first-child { margin-top: 0; }
.preview-content blockquote p:last-child { margin-bottom: 0; }

.preview-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--reader-card-input);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
}
.preview-content pre {
  position: relative;
  background: var(--reader-card-input);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 18px 16px;
  overflow-x: auto;
  line-height: 1.55;
}
.preview-content pre[data-lang]::before {
  content: attr(data-lang);
  position: absolute;
  top: 0; right: 0;
  background: var(--accent);
  color: var(--bwb-text-inverse);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 10px;
  border-radius: 0 var(--radius) 0 var(--radius-sm);
}
.preview-content pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--bwb-text-primary);
  font-size: 13px;
  display: block;
}

.preview-content ul,
.preview-content ol {
  padding-left: 22px;
  color: var(--bwb-text-primary);
}
.preview-content ul li,
.preview-content ol li { margin-top: 4px; }
.preview-content ul li::marker { color: var(--accent); }
.preview-content ol li::marker { color: var(--accent); font-weight: 600; }

.preview-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  border: 1px solid var(--bwb-border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.preview-content thead {
  background: var(--reader-surface);
  border-bottom: 2px solid var(--accent);
}
.preview-content th,
.preview-content td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--bwb-border-subtle);
}
.preview-content th {
  color: var(--accent);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.preview-content tbody tr:last-child td { border-bottom: 0; }
.preview-content tbody tr:nth-child(even) { background: var(--reader-card-input); }

.preview-content hr {
  border: 0;
  height: 28px;
  margin: 32px 0;
  background-image:
    linear-gradient(to right,
      transparent 0%, transparent calc(50% - 30px),
      var(--accent) calc(50% - 30px), var(--accent) calc(50% - 24px),
      transparent calc(50% - 24px), transparent calc(50% - 4px),
      var(--accent) calc(50% - 4px), var(--accent) calc(50% + 4px),
      transparent calc(50% + 4px), transparent calc(50% + 24px),
      var(--accent) calc(50% + 24px), var(--accent) calc(50% + 30px),
      transparent calc(50% + 30px), transparent 100%);
  background-size: 100% 3px;
  background-repeat: no-repeat;
  background-position: center;
}

.preview-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

/* GFM task lists - marked emits <li class="task-list-item"> with a checkbox input */
.preview-content ul:has(> li.task-list-item) {
  list-style: none;
  padding-left: 0;
}
.preview-content li.task-list-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.preview-content li.task-list-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border: 1.5px solid var(--bwb-border-strong);
  border-radius: 3px;
  margin: 4px 0 0;
  flex: 0 0 16px;
  position: relative;
  cursor: default;
}
.preview-content li.task-list-item input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}
.preview-content li.task-list-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 4px; top: 1px;
  width: 5px; height: 9px;
  border: solid var(--bwb-text-inverse);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.preview-content li.task-list-item:has(input:checked) {
  color: var(--bwb-text-muted);
}
.preview-content li.task-list-item:has(input:checked) > * {
  text-decoration: line-through;
}
.preview-content li.task-list-item:has(input:checked) > input {
  text-decoration: none;
}

.preview-content kbd {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--reader-card-input);
  border: 1px solid var(--bwb-border-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--bwb-text-secondary);
}

/* Footer */

.footer {
  height: var(--footer-h);
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  background: var(--reader-surface);
  border-top: 2px solid var(--accent);
  color: var(--bwb-text-muted);
  font-size: 12px;
}
/* Footer is file-stats only per the 2026-05-26 STA-first positioning decision -
 * Pinion.md ships without in-app maker attribution or Ko-fi tip jar so it
 * reads as a neutral staff tool inside the STA Training Hub. README keeps
 * the BwB attribution since that surface is developer-only. */
.footer .left,
.footer .right {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.footer .muted { color: var(--bwb-text-muted); }
.footer .stat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.footer .stat .label {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 10.5px;
  font-weight: 700;
}
.footer .stat .val {
  color: var(--bwb-text-secondary);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

/* Toast */

.toast {
  position: fixed;
  bottom: calc(var(--footer-h) + 16px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bwb-text-primary);
  color: var(--bwb-text-inverse);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  box-shadow: 0 4px 16px rgba(15, 26, 46, 0.25);
  z-index: 100;
  max-width: 480px;
  border-left: 3px solid var(--accent);
}
.toast[data-kind="warning"] { border-left-color: var(--bwb-status-warning); }
.toast[data-kind="danger"] { border-left-color: var(--bwb-status-danger); }
.toast[data-kind="success"] { border-left-color: var(--bwb-status-success); }

/* v1.1: ghost-button active state (Contents toggle pressed) */
.btn-ghost.active {
  background: var(--accent);
  color: var(--bwb-text-inverse);
  border-color: var(--accent);
}
.btn-ghost.active:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--bwb-text-inverse);
}

/* v1.1: Preview body = optional TOC rail beside the scroll area, under header */
.preview-body {
  display: flex;
  flex: 1 1 auto;
  min-height: 0;
}
.preview-body .pane-scroll {
  flex: 1 1 auto;
  min-width: 0;
}

/* v1.1: Table of contents rail */
.toc-panel {
  flex: 0 0 auto;
  width: 224px;
  overflow: auto;
  background: var(--reader-surface);
  border-right: 2px solid var(--accent);
  padding: 14px 12px 24px 16px;
}
.toc-label {
  color: var(--accent);
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0 6px 8px;
}
.toc-list,
.toc-sublist { list-style: none; margin: 0; padding: 0; }
.toc-sublist { padding-left: 12px; }
.toc-sublist:empty { display: none; }
.toc-item { margin: 0; }
.toc-link {
  display: block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  color: var(--bwb-text-secondary);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.35;
}
.toc-link:hover { background: var(--reader-card-input); color: var(--accent); }
.toc-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.toc-link.active {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
  background: var(--reader-card-input);
}

/* v1.1: Code-block copy button + language pill toolbar */
.preview-content pre.has-tools::before { display: none; } /* JS draws the pill */
.preview-content pre .pre-tools {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 1;
}
.preview-content pre .pre-tools .lang-pill {
  background: var(--accent);
  color: var(--bwb-text-inverse);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 10px;
  border-radius: 0 var(--radius) 0 var(--radius-sm);
}
.code-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 4px 0 0 4px;
  padding: 3px 7px;
  font: inherit;
  font-size: 11px;
  line-height: 1;
  color: var(--bwb-text-secondary);
  background: var(--reader-card);
  border: 1px solid var(--bwb-border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0;
  transition: opacity 100ms ease, color 80ms ease, border-color 80ms ease;
}
.preview-content pre:hover .code-copy-btn,
.code-copy-btn:focus-visible { opacity: 1; }
.code-copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.code-copy-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.code-copy-btn.copied { color: var(--accent); border-color: var(--accent); }
.code-copy-btn .icon { width: 12px; height: 12px; }
@media (hover: none) { .code-copy-btn { opacity: 1; } }

/* v1.1: In-document search bar (overlay, top-right of the preview pane) */
.search-bar {
  position: absolute;
  top: 6px;
  right: 12px;
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 4px 4px 10px;
  background: var(--reader-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 16px rgba(15, 26, 46, 0.18);
}
.search-bar .search-icon {
  width: 15px; height: 15px;
  color: var(--bwb-text-muted);
  flex: 0 0 auto;
}
.search-input {
  border: 0;
  background: transparent;
  color: var(--bwb-text-primary);
  font: inherit;
  font-size: 13px;
  width: 160px;
  outline: none;
  padding: 2px 0;
}
.search-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--bwb-text-muted);
  min-width: 58px;
  text-align: right;
  white-space: nowrap;
}
.search-btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  padding: 4px;
  border: 0;
  background: transparent;
  color: var(--bwb-text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.search-btn:hover { background: var(--reader-card-input); color: var(--accent); }
.search-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.search-btn svg { width: 15px; height: 15px; }

/* v1.1: search match highlights */
mark.search-hit {
  background: rgba(43, 74, 139, 0.22);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
}
mark.search-hit.active {
  background: var(--accent);
  color: var(--bwb-text-inverse);
}

/* v1.1: YAML frontmatter metadata card */
.preview-content .fm-card {
  background: var(--reader-surface);
  border: 1px solid var(--bwb-border-subtle);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 18px;
}
.fm-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 18px;
  margin: 0;
}
.fm-key {
  color: var(--accent);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
  padding-top: 1px;
}
.fm-val { margin: 0; color: var(--bwb-text-primary); }
.fm-val.fm-empty { color: var(--bwb-text-muted); }
.fm-raw {
  grid-column: 1 / -1;
  color: var(--bwb-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}
.fm-tag {
  display: inline-block;
  background: var(--reader-card-input);
  border: 1px solid var(--bwb-border-strong);
  border-radius: 999px;
  padding: 1px 9px;
  margin: 0 4px 4px 0;
  font-size: 12px;
}

/* Narrow viewport graceful collapse - desktop-first per spec; this keeps
 * the chrome usable down to ~720px without targeting mobile as a v1 surface. */
@media (max-width: 900px) {
  .body[data-view="split"] {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }
  .filename-badge { max-width: 160px; }
  .header { gap: 10px; padding: 0 12px; }
  .seg-control button { padding: 4px 8px; }
  .footer .left .stat:nth-child(n+3) { display: none; }
}

/* v1.1: on narrow widths the TOC becomes an overlay drawer instead of a rail. */
@media (max-width: 720px) {
  .preview-body { position: relative; }
  .pane-preview.toc-open .toc-panel {
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 78%;
    max-width: 260px;
    z-index: 5;
    box-shadow: 4px 0 16px rgba(15, 26, 46, 0.22);
  }
  .search-input { width: 110px; }
}

/* ===================================================================== *
 * v1.4 — heading anchors · image lightbox · emoji (no CSS) · scroll memory
 * ===================================================================== */

/* Heading anchor links: reserve space via relative heading + absolute anchor so
 * revealing it on hover/focus never shifts the heading layout. */
.preview-content h1.has-anchor,
.preview-content h2.has-anchor,
.preview-content h3.has-anchor,
.preview-content h4.has-anchor,
.preview-content h5.has-anchor,
.preview-content h6.has-anchor {
  position: relative;
}
.preview-content .heading-anchor {
  position: absolute;
  left: -1.35em;
  top: 0.12em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1em;
  height: 1.1em;
  color: var(--accent);
  opacity: 0;
  transition: opacity 90ms ease;
  text-decoration: none;
}
.preview-content .heading-anchor .icon { width: 0.85em; height: 0.85em; }
.preview-content h1.has-anchor:hover .heading-anchor,
.preview-content h2.has-anchor:hover .heading-anchor,
.preview-content h3.has-anchor:hover .heading-anchor,
.preview-content h4.has-anchor:hover .heading-anchor,
.preview-content h5.has-anchor:hover .heading-anchor,
.preview-content h6.has-anchor:hover .heading-anchor,
.preview-content .heading-anchor:focus-visible {
  opacity: 1;
}
.preview-content .heading-anchor:hover { color: var(--accent-hover); }
.preview-content .heading-anchor:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}
/* On narrow widths there is no room for a left-gutter anchor; tuck it inline. */
@media (max-width: 720px) {
  .preview-content .heading-anchor { position: static; opacity: 1; margin-left: 6px; }
}

/* Image lightbox: body images signal clickability; overlay dims the app. */
.preview-content img.zoomable { cursor: zoom-in; }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: rgba(15, 26, 46, 0.82);
  backdrop-filter: blur(2px);
}
.lightbox-img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
  cursor: zoom-out;
}
.lightbox-close {
  position: absolute;
  top: 16px;
  right: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  background: rgba(15, 26, 46, 0.5);
  color: var(--bwb-text-inverse);
  cursor: pointer;
}
.lightbox-close:hover { border-color: rgba(255, 255, 255, 0.8); }
.lightbox-close:focus-visible {
  outline: 2px solid var(--bwb-text-inverse);
  outline-offset: 2px;
}
.lightbox-close svg { width: 22px; height: 22px; }

/* ===================================================================== *
 * v1.5 — presentation mode (transient fullscreen overlay)
 * ===================================================================== */

.present-overlay {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  flex-direction: column;
  background: var(--reader-surface);
  /* Larger base type for projection; scales with viewport. */
  font-size: clamp(17px, 1.6vw, 24px);
}

.present-stage {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

/* Each slide stacks in the stage; only the active one shows. The slide itself
 * is the scroll container so long slides scroll within the deck. */
.present-stage .slide {
  position: absolute;
  inset: 0;
  display: none;
  overflow: auto;
}
.present-stage .slide.active { display: block; }

/* Reuse the indigo .preview-content markdown styling; center a wider column and
 * vertically center short slides while letting long ones scroll from the top. */
.present-stage .slide-content {
  box-sizing: border-box;
  min-height: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 6vh 6vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.present-stage .slide-content > :first-child { margin-top: 0; }

/* Bottom control bar: prev / counter / next / exit, indigo on the reader card. */
.present-bar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 10px 16px;
  background: var(--reader-card);
  border-top: 2px solid var(--accent);
}
.present-counter {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  min-width: 64px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.present-nav,
.present-close {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 6px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  transition: background 80ms ease, color 80ms ease;
}
.present-nav:hover,
.present-close:hover {
  background: var(--accent);
  color: var(--bwb-text-inverse);
}
.present-nav:focus-visible,
.present-close:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.present-close { margin-left: 10px; }
.present-nav svg,
.present-close svg { width: 18px; height: 18px; }

/* ===================================================================== *
 * v1.2 — Mermaid diagrams · drag-and-drop · footnotes
 * ===================================================================== */

/* Mermaid rendered diagrams (per-diagram color CSS is injected via CSSOM). */
.preview-content .mermaid-diagram {
  margin: 18px 0;
  text-align: center;
}
.preview-content .mermaid-diagram svg {
  max-width: 100%;
  height: auto;
}
.preview-content .mermaid-error {
  margin: 12px 0;
  padding: 10px 14px;
  border: 1px solid var(--bwb-status-danger);
  border-left: 4px solid var(--bwb-status-danger);
  border-radius: var(--radius-sm);
  background: var(--reader-card-input);
  color: var(--bwb-status-danger);
  font-family: var(--font-mono);
  font-size: 12.5px;
}

/* Footnote references (superscript indigo links). */
.preview-content sup.fn-ref { line-height: 0; }
.preview-content .fn-ref-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.78em;
  padding: 0 1px;
}
.preview-content .fn-ref-link:hover { text-decoration: underline; color: var(--accent-hover); }
.preview-content .fn-ref-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Footnotes section at the bottom of the document. */
.preview-content .footnotes { margin-top: 40px; }
.preview-content .footnotes-title {
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-top: 2px solid var(--accent);
  padding-top: 14px;
  margin-bottom: 6px;
}
.preview-content .footnotes-list {
  padding-left: 22px;
  color: var(--bwb-text-secondary);
  font-size: 0.92em;
}
.preview-content .footnotes-list li { margin-top: 8px; }
.preview-content .footnotes-list li::marker { color: var(--accent); font-weight: 600; }
.preview-content .footnote-content > :first-child { display: inline; }
.preview-content .footnote-content > :last-child { display: inline; }
.preview-content .footnote-backref {
  color: var(--accent);
  text-decoration: none;
  margin-left: 5px;
  font-size: 0.95em;
}
.preview-content .footnote-backref:hover { color: var(--accent-hover); }
.preview-content .footnote-backref:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}
.preview-content .footnote-backref sup { font-size: 0.85em; }

/* Drag-and-drop overlay — indigo dashed affordance over the whole window. */
.drop-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(229, 231, 235, 0.82);
  backdrop-filter: blur(2px);
  pointer-events: none;
}
.drop-overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 48px 64px;
  border: 3px dashed var(--accent);
  border-radius: var(--radius);
  background: var(--reader-card);
  box-shadow: 0 8px 32px rgba(15, 26, 46, 0.18);
}
.drop-overlay .drop-icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
}
.drop-overlay .drop-text {
  color: var(--bwb-text-primary);
  font-size: 16px;
  font-weight: 600;
}
.drop-overlay .drop-text code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--accent);
  background: var(--reader-card-input);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
}