.gear-research {
  --gear-ink: var(--text-color);
  --gear-heading: var(--heading-color);
  --gear-accent: var(--heading-accent);
  --gear-edge: var(--blockquote-border);
  --gear-paper: var(--blockquote-bg);
  --gear-tint: var(--soft-bg);
  min-width: 0;
}
.gear-research, .gear-research * { 
  box-sizing: border-box;
}
.gear-research .hero {
  padding: 0.35rem 0.35rem 0.8rem;
  text-align: left;
}
.gear-research .hero h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.9rem, 2.9vw, 2.75rem);
  line-height: 1.2;
  text-align: center;
  color: var(--gear-heading);
  overflow-wrap: anywhere;
}
.gear-research .hero .lede {
  max-width: 90ch;
  margin: 0.45rem auto;
  font-size: 0.96rem;
  line-height: 1.55;
}
.gear-research .hero .page-updated {
  margin: 0.4rem 0 0;
  font-size: 0.84rem;
  color: var(--gear-ink);
}
.gear-research .sticky {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.45rem;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.55rem 0.65rem;
  background: var(--gear-paper);
  border-block: 1.5px solid var(--gear-edge);
  border-radius: 4px;
  box-shadow: 0 2px 8px var(--blockquote-shadow);
}
.gear-research .sticky::-webkit-scrollbar { 
  display: none; 
}
.gear-research .sticky a, .gear-research .sticky a:visited {
  flex: 0 0 auto;
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--accent-soft);
  border-radius: 9px;
  text-decoration: none;
  white-space: nowrap;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--link-color);
  background: var(--box-bg);
  box-shadow: none;
}
.gear-research .sticky a:hover, .gear-research .sticky a:focus-visible {
  color: var(--gear-accent);
  background: var(--accent-faint);
  border-color: var(--gear-accent);
  font-style: normal;
}
.gear-research .sticky a:focus-visible, .gear-research .path:focus-visible {
  outline: 2px solid var(--gear-accent);
  outline-offset: 3px;
}
.gear-research .paths {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 1rem 0 1.6rem;
}
.gear-research .path, .gear-research .path:visited {
  display: block;
  min-width: 0;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background: var(--box-bg);
  box-shadow: 0 1px 3px var(--blockquote-shadow);
  text-decoration: none;
  color: var(--gear-ink);
  line-height: 1.25;
  text-align: left;
}
.gear-research .path:hover {
  background: var(--accent-faint);
  font-style: normal;
}
.gear-research .path b {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.02rem;
  font-family: 'Aleo';
  color: var(--entry-title);
}
.gear-research .path small {
  display:block; 
  font-size:0.78rem;
  line-height:1.45;
}
.gear-research .gear-quick-guide {
  margin: 1.3rem 0 2.3rem;
}
.gear-research .content {
  min-width: 0;
  padding: 0 0.25rem 0.75rem;
}
.gear-research .section {
  min-width: 0;
  margin: 0 0 2.7rem;
  scroll-margin-top: 5rem;
}
.gear-research .section:last-child { 
  margin-bottom: 0; 
}
.gear-research [id] { 
  scroll-margin-top: 5rem; 
}
.gear-research .section-head {
  display: block;
  position: relative;
  margin: 0 0 1.05rem;
  padding: 0 0 0.78rem;
  border: 0;
}
.gear-research .section-head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--gear-accent) 0%,
              var(--accent-soft) 52%, transparent 100%);
}
.gear-research .section-head h2 {
  margin: 0;
  color: var(--gear-heading);
  font-family: 'Covered By Your Grace';
  font-size: 50px;
  line-height: 1.30;
  text-align: left;
  text-decoration: none;
}
.gear-research .section-head + p { 
  margin: 0 0 1.15rem; 
}
.gear-research .section-head p { 
  margin: 0.3rem 0 0; font-size: 0.84rem; 
}
.gear-research .primer {
  display: flow-root;
  min-width: 0;
  margin: 0;
  padding: 1.65rem;
  background: var(--gear-tint);
  border: 2px solid var(--gear-edge);
  border-radius: 3.5px;
}
.gear-research .primer h3, .gear-research .source-card-section > h3, .gear-research .sketch-breakdown > h3 {
  margin: 0.9rem 0 0.65rem;
  font-size: 32px;
  line-height: 1.3;
  color: var(--gear-accent);
  text-align: left;
  text-decoration: none;
}
.gear-research .primer > h3:first-child { 
  margin-top: 0; 
}
.gear-research .primer p { 
  overflow-wrap: break-word;
  text-align: justify;
  letter-spacing: 0.025em;
}
.gear-research .primer--feature-v1 {
  border: 6px solid var(--accent-soft);
  border-image-source: var(--broider-lace-image);
  border-image-slice: 7;
  border-image-width: 6px;
  border-image-repeat: round;
  background-clip: padding-box;
}
.gear-research .primer--feature-v2 {
  border-image-source: var(--broider-ribbon-image);
  border-image-slice: 14;
  border-image-width: 13px;
  border-image-repeat: round;
  background-clip: padding-box;
  box-sizing: border-box;
  border-image-outset: 5px;
}
.gear-research .timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  margin: 0;
}
.gear-research .rig {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 2.5px solid var(--gear-accent);
  border-radius: 6.5px;
  background: var(--gear-paper);
}
.gear-research .rig.highlight { 
  border: 2px solid var(--border-color); 
}
.gear-research .rig-head { 
  padding: 0.95rem 1.1rem 0.5rem; 
}
.gear-research .rig-head h3 {
  margin: 0;
  color: var(--gear-accent);
  font-size: clamp(1.35rem, 1.9vw, 1.75rem);
  line-height: 1.3;
  text-align: left;
  text-decoration: none;
}
.gear-research .rig > .rig-cover {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  max-height: 300px;
  object-position: center;
  padding: 0.3rem 0.85rem;
  background: var(--extra-bg);
  aspect-ratio: auto;
  object-fit: contain;
}
.gear-research .rig-body { 
  min-width:0; padding: 0.8rem 1.1rem 1.1rem; 
}
.gear-research .rig-body > p { 
  margin: 0 0 0.65rem; font-size: 0.95rem; 
}
.gear-research .rig-body details {
  min-width: 0;
  margin-top: 0.55rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--gear-edge);
}
.gear-research .rig-body blockquote {
  background: var(--box-bg);
}
.gear-research .rig-body summary {
  cursor: pointer;
  color: var(--entry-title);
  font-weight: 700;
  font-size: 0.96rem;
  line-height: 1.45;
}
.gear-research .rig-body summary::marker { 
  color:var(--gear-accent);
}
.gear-research .rig-body details[open] > summary { 
  margin-bottom: 1rem;
}
.gear-research .rig-body details p { 
 font-size: 0.96rem; line-height: 1.6;
}
.gear-research .rig .research-table-shell { 
 max-width:100%; margin: 1rem auto;
}
.gear-research .research-table caption::after { 
width: min(100%, 48rem); 
}
.gear-research .rig-body > details > iframe {
  display: block;
  width: min(100%, 740px);
  height: auto;
  aspect-ratio: 16 / 9;
  margin: 1.2rem auto;
}

/* never override #bigcontainer width */
.gear-research img { max-width: 100%; height: auto; }
.gear-research .photo-set { min-width: 0; max-width:100%; }
.gear-research .photo-set img { max-width:100%; height:auto; }
.gear-research .photo-set-grid { min-width:0; }
.gear-research .photo-set-grid img { max-width: min(100%, 350px); }
.gear-research .diagram-scroll { max-width:100%; min-width:0; overflow-x:auto; }
.gear-research .diagram-scroll img { max-width: none; min-width:680px; width:auto; height:auto; }
.gear-research .sketch-layout { min-width:0; }
.gear-research .sketch-layout > * { min-width:0; }
.gear-research .sketch-map img { max-width:100%; }
.gear-research iframe { max-width:100%; }

.gear-research .source-card-section { 
  margin: 1.35rem 0;
}
.gear-research .source-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  align-items: stretch;
  margin: 1rem 0;
}
.gear-research .source-card {
  min-width: 0;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--accent-soft);
  border-left: 1.5px solid var(--border-color);
  border-right: 1.5px solid var(--border-color);
  border-radius: 8px;
  background: var(--box-bg);
  box-shadow: 1px 2px 4px var(--blockquote-shadow);
  font-size: 0.92em;
  line-height: 1.5;
  letter-spacing: 0.02em;
  text-align: left;
}
.gear-research .source-card-grid > .source-card:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}
.gear-research .source-card p {
  font-size: inherit;
  line-height: inherit;
}
.gear-research .source-card p:last-of-type { 
margin-bottom: 0.65rem;
}
.gear-research .source-card .quote-cite { 
margin-top: 0.7rem;
}
.gear-research .primer > blockquote:not(.source-card) {
  width: min(100%, 88ch);
  margin: 1.2rem auto;
  padding: 1rem 1.25rem;
  border-color: var(--accent-soft);
  background: var(--gear-paper);
  text-align: left;
}
.gear-research .primer > aside:is(.equipment-note,.tone-note,.amp-note,.info-note), .gear-research .rig-body details > aside:is(.equipment-note,.tone-note,.amp-note,.info-note) {
  float: none;
  clear: none;
  display: block;
  width: min(100%, 38rem);
  max-width: 100%;
  margin: 1rem 0;
  text-align: left;
}
.gear-research .primer > aside.side-right { 
  margin-left: auto;
}
.gear-research .primer > aside.side-left {
  margin-right: auto;
}
.gear-research .gear-feature-pair {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 1.2rem;
  align-items: center;
  margin: 1.4rem 0;
  clear: both;
}
.gear-research .gear-feature-pair--production {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
}
.gear-research .gear-feature-pair > * {
  min-width:0;
}
.gear-research .gear-feature-pair > aside:is(.equipment-note,.tone-note,.amp-note,.info-note) {
  float: none;
  clear: none;
  width: 100%;
  margin: 0;
  max-width: none;
  align-self: start;
}
.gear-research .gear-feature-pair .gear-feature-media, .gear-research .gear-feature-pair .photo-set {
  max-width:100%;
  min-width:0;
  margin:0;
  text-align:center;
}
.gear-research .gear-feature-pair .gear-feature-media img, .gear-research .gear-feature-pair .photo-set img {
  display:block;
  max-width:100%;
  max-height:380px;
  height:auto;
  width:auto;
  object-fit:contain;
  margin-inline:auto;
}
.gear-research .gear-feature-pair--links > .gear-feature-media {
grid-column:1; grid-row:1;
}
.gear-research .gear-feature-pair--links > aside { 
grid-column:2; grid-row:1; 
}
.gear-research .gear-feature-pair--production > .photo-set { 
grid-column:1; grid-row:1; 
}
.gear-research .gear-feature-pair--production > aside { 
grid-column:2; grid-row:1; 
}
.gear-research .columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  align-items: start;
}
.gear-research .columns > * { 
  min-width:0;
}
.gear-research .guitar-faq { 
  max-width: 110ch; 
}
.gear-research .gear-faq-group { 
  padding: 0.55rem 0;
}
.gear-research .gear-faq-group + .gear-faq-group {
  margin-top: 1.05rem;
  border-top: 2px solid var(--accent-soft);
}
.gear-research .gear-faq-group h3 {
  margin: 0.4rem 0 0.9rem;
  font-size: clamp(1.25rem, 1.6vw, 1.55rem);
  font-family: 'Indie Flower';
  text-align:left;
  text-decoration:none;
  color:var(--gear-accent);
}
.gear-research .page-references {
max-width: 100%;
}
.gear-research .gear-1980s-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  align-items: stretch;
  margin: 1.2rem 0 0;
}
.gear-research .gear-1980s-grid .gear-era-find {
  min-width: 0;
  max-width: 100%;
  margin: 0;
  padding: 0.85rem;
  background: var(--gear-paper);
  border: 1px solid var(--gear-edge);
  border-radius: 8px;
  text-align: left;
}
.gear-research .gear-era-image {
  display: flex;
  align-items: center;
  justify-content: center;
  height: clamp(170px, 23vw, 290px);
  min-width: 0;
  overflow: hidden;
  border-radius: 6px;
  background: var(--box-bg);
}
.gear-research .gear-era-image img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  border: 0;
  border-radius: 0;
  object-fit: contain;
  margin: 0;
}
.gear-research .gear-era-find figcaption {
  margin: 0.7rem 0 0;
  max-width: none;
  font-size: 0.9em;
  line-height: 1.55;
  text-align: left;
  color: var(--gear-ink);
}
/* textbook insert headings override */
.gear-research .primer :is(
  .equipment-note,
  .tone-note,
  .amp-note,
  .info-note
) h3 {
  font-size: 1.15em;
  line-height: 1.35;
  text-align: right;
  text-decoration: none;
  color: var(--heading-accent);
  margin-top: 0;
}
@media (max-width: 1100px) {
  .gear-research .columns { grid-template-columns: minmax(0,1fr); }
}
@media (max-width: 800px) {
  .gear-research .paths { grid-template-columns: minmax(0,1fr); gap:0.6rem; }
  .gear-research .gear-feature-pair,
  .gear-research .gear-feature-pair--production { grid-template-columns:minmax(0,1fr); }
  .gear-research .gear-feature-pair--links > .gear-feature-media,
  .gear-research .gear-feature-pair--links > aside,
  .gear-research .gear-feature-pair--production > .photo-set,
  .gear-research .gear-feature-pair--production > aside { grid-column:auto;grid-row:auto; }
  .gear-research .gear-feature-pair > aside:is(.info-note,.equipment-note,.tone-note,.amp-note) {
    width:100%;margin:0;
  }
  .gear-research .content {padding:0 0 0.5rem;}
  .gear-research .primer {padding:1rem;}
  .gear-research .section {margin-bottom:2.25rem;}
}
@media (max-width: 720px) {
  .gear-research .source-card-grid {grid-template-columns:minmax(0,1fr);}
  .gear-research .source-card-grid > .source-card:last-child:nth-child(odd) {grid-column:auto;}
  .gear-research .rig > .rig-cover {max-height:240px;}
  .gear-research .photo-set-grid img {max-width:100%;}
  .gear-research .section-head h2 {font-size:clamp(1.65rem, 6vw, 2rem);}
  .gear-research .hero h1 {font-size:clamp(1.75rem,7vw,2.25rem);}
  .gear-research .sticky {padding:0.5rem 0.35rem;border-radius:0;}
}
@media (prefers-reduced-motion: no-preference) {
  .gear-research .path {transition:background-color 130ms ease, border-color 130ms ease;}
}

@media (max-width: 700px) {
  .gear-research .gear-1980s-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.8rem;
  }
  .gear-research .gear-era-image {
    height: clamp(190px, 60vw, 320px);
  }
}