/* Pomeroy Blues & Riverbend Archive — 78-RPM Sleeve & Spun Brass Resonator */
:root {
  --pbl-cotton: #FAF7F0;
  --pbl-cotton-tint: #F3ECE0;
  --pbl-cotton-card: #FFFFFF;
  --pbl-mud: #1C1917;
  --pbl-mud-soft: #38332E;
  --pbl-mud-light: #574F47;
  --pbl-brass: #B45309;
  --pbl-brass-glow: #D97706;
  --pbl-brass-light: #FDE68A;
  --pbl-indigo: #1D4ED8;
  --pbl-indigo-hover: #1E40AF;
  --pbl-border: #DCD3C2;
  --pbl-border-dark: #B8A890;
  --pbl-font-heading: "Bitter", Georgia, serif;
  --pbl-font-body: "Cabin", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --pbl-font-mono: "Space Mono", ui-monospace, Menlo, Consolas, monospace;
  --pbl-radius: 4px;
  --pbl-max-width: 1140px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--pbl-font-body);
  font-size: 1.0625rem;
  line-height: 1.68;
  color: var(--pbl-mud);
  background-color: var(--pbl-cotton);
  background-image:
    radial-gradient(rgba(28, 25, 23, 0.04) 1px, transparent 1px),
    radial-gradient(rgba(180, 83, 9, 0.03) 1px, transparent 1px);
  background-size: 24px 24px, 48px 48px;
  background-position: 0 0, 12px 12px;
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--pbl-indigo);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--pbl-brass);
}

:focus-visible {
  outline: 3px solid var(--pbl-brass);
  outline-offset: 3px;
}

h1, h2, h3, h4 {
  font-family: var(--pbl-font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--pbl-mud);
  margin: 0 0 0.6em;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  margin-top: 1.8em;
  border-bottom: 2px solid var(--pbl-border);
  padding-bottom: 0.3em;
}

h3 {
  font-size: 1.35rem;
  margin-top: 1.4em;
}

p {
  margin: 0 0 1.2em;
}

ul, ol {
  padding-left: 1.4em;
  margin: 0 0 1.3em;
}

li {
  margin-bottom: 0.45em;
}

.pbl-skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--pbl-brass);
  color: #fff;
  padding: 0.6rem 1.2rem;
  font-weight: 700;
  z-index: 999;
  border-radius: var(--pbl-radius);
  text-decoration: none;
}

.pbl-skip-link:focus {
  top: 1rem;
}

.pbl-shell {
  max-width: var(--pbl-max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header & 78-RPM Label Ring */
.pbl-label-ring {
  background: var(--pbl-mud);
  color: var(--pbl-cotton);
  border-bottom: 5px solid var(--pbl-brass);
  position: relative;
}

.pbl-announcement-tape {
  background: #110F0E;
  color: #D6CEBE;
  font-family: var(--pbl-font-mono);
  font-size: 0.85rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid #2B2622;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pbl-tape-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pbl-header-main {
  padding: 1.25rem 0 1.1rem;
}

.pbl-brand-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.pbl-identity-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: inherit;
}

.pbl-ring-badge {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: radial-gradient(circle, #292420 0%, #151312 65%, var(--pbl-brass) 100%);
  border: 2px solid var(--pbl-brass-glow);
  box-shadow: 0 0 0 2px var(--pbl-mud), 0 0 0 4px var(--pbl-border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
}

.pbl-spindle-hole {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--pbl-cotton);
  border: 2px solid var(--pbl-brass);
}

.pbl-brand-title {
  font-family: var(--pbl-font-heading);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--pbl-cotton);
  display: block;
}

.pbl-brand-sub {
  font-family: var(--pbl-font-mono);
  font-size: 0.82rem;
  color: var(--pbl-brass-glow);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: block;
  margin-top: 0.2rem;
}

.pbl-nav-list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 0.4rem 1.1rem;
  flex-wrap: wrap;
}

.pbl-nav-link {
  color: #EDE7DC;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.35rem 0.6rem;
  border-radius: var(--pbl-radius);
  transition: all 0.15s ease;
}

.pbl-nav-link:hover,
.pbl-nav-link[aria-current="page"] {
  color: #FFFFFF;
  background: rgba(180, 83, 9, 0.4);
  text-decoration: none;
}

/* Liner Sleeve Main Container */
.pbl-liner-sleeve {
  padding: 2.2rem 0 3.5rem;
}

.pbl-sleeve-frame {
  background: var(--pbl-cotton-card);
  border: 1px solid var(--pbl-border);
  border-radius: var(--pbl-radius);
  box-shadow: 0 4px 20px rgba(28, 25, 23, 0.06);
  padding: 2.4rem 2.2rem;
  position: relative;
}

@media (max-width: 768px) {
  .pbl-sleeve-frame {
    padding: 1.5rem 1.1rem;
  }
}

.pbl-breadcrumbs {
  font-family: var(--pbl-font-mono);
  font-size: 0.84rem;
  margin-bottom: 1.5rem;
  color: var(--pbl-mud-light);
}

.pbl-breadcrumbs a {
  color: var(--pbl-mud-soft);
  text-decoration: none;
}

.pbl-breadcrumbs a:hover {
  text-decoration: underline;
  color: var(--pbl-brass);
}

.pbl-hero-liner {
  border-bottom: 3px double var(--pbl-border-dark);
  padding-bottom: 1.8rem;
  margin-bottom: 2.2rem;
}

.pbl-eyebrow {
  font-family: var(--pbl-font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pbl-brass);
  margin-bottom: 0.5rem;
}

.pbl-liner-lede {
  font-size: 1.22rem;
  line-height: 1.6;
  color: var(--pbl-mud-soft);
  max-width: 48rem;
}

.pbl-curator-stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--pbl-cotton-tint);
  border: 1px solid var(--pbl-border);
  padding: 0.5rem 0.9rem;
  border-radius: var(--pbl-radius);
  font-family: var(--pbl-font-mono);
  font-size: 0.85rem;
  color: var(--pbl-mud-soft);
  margin-top: 1rem;
}

/* Field Recording Article */
.pbl-field-recording {
  margin-bottom: 2.5rem;
}

.pbl-record-meta-box {
  background: var(--pbl-cotton-tint);
  border-left: 4px solid var(--pbl-brass);
  padding: 1rem 1.25rem;
  margin: 1.4rem 0 1.8rem;
  border-radius: 0 var(--pbl-radius) var(--pbl-radius) 0;
  font-size: 0.95rem;
}

.pbl-record-meta-box p:last-child {
  margin-bottom: 0;
}

/* ASCII Guitar Tablature */
.pbl-ascii-tab {
  font-family: var(--pbl-font-mono);
  font-size: 0.88rem;
  line-height: 1.45;
  background: #181513;
  color: #F8F4EA;
  padding: 1.4rem 1.6rem;
  border-radius: var(--pbl-radius);
  overflow-x: auto;
  border: 2px solid #2F2A25;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
  margin: 1.4rem 0 1.8rem;
}

.pbl-tab-caption {
  font-family: var(--pbl-font-mono);
  font-size: 0.82rem;
  color: var(--pbl-mud-light);
  margin-top: -1.2rem;
  margin-bottom: 1.6rem;
}

/* Tension & Technical Tables */
.pbl-table-container {
  overflow-x: auto;
  margin: 1.4rem 0 2rem;
}

.pbl-tension-chart {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background: #FFFFFF;
  border: 1px solid var(--pbl-border);
  border-radius: var(--pbl-radius);
}

.pbl-tension-chart th {
  background: var(--pbl-mud);
  color: #FFFFFF;
  font-family: var(--pbl-font-heading);
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

.pbl-tension-chart td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--pbl-border);
  color: var(--pbl-mud);
}

.pbl-tension-chart tr:nth-child(even) td {
  background: var(--pbl-cotton-tint);
}

.pbl-tension-chart tr:hover td {
  background: #FDF4E6;
}

.pbl-mono-val {
  font-family: var(--pbl-font-mono);
  font-weight: 700;
}

/* Calculator Widget */
.pbl-calc-shell {
  background: var(--pbl-cotton-tint);
  border: 2px solid var(--pbl-border-dark);
  border-radius: var(--pbl-radius);
  padding: 1.8rem;
  margin: 2.2rem 0;
  box-shadow: 0 4px 16px rgba(28, 25, 23, 0.05);
}

.pbl-calc-header {
  margin-bottom: 1.4rem;
}

.pbl-calc-header h3 {
  margin: 0 0 0.3rem;
  font-size: 1.4rem;
  color: var(--pbl-mud);
}

.pbl-calc-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.8rem;
}

.pbl-calc-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.pbl-calc-label {
  font-family: var(--pbl-font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--pbl-mud);
}

.pbl-calc-select {
  font-family: var(--pbl-font-body);
  font-size: 0.98rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--pbl-border-dark);
  border-radius: var(--pbl-radius);
  background: #FFFFFF;
  color: var(--pbl-mud);
}

.pbl-calc-select:focus {
  border-color: var(--pbl-brass);
  outline: 2px solid var(--pbl-brass-glow);
}

.pbl-calc-metric-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.1rem;
  margin-bottom: 1.8rem;
}

.pbl-metric-card {
  background: #FFFFFF;
  border: 1px solid var(--pbl-border);
  padding: 1.1rem 1.25rem;
  border-radius: var(--pbl-radius);
  position: relative;
}

.pbl-metric-eyebrow {
  font-family: var(--pbl-font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--pbl-mud-light);
  display: block;
}

.pbl-metric-num {
  font-family: var(--pbl-font-mono);
  font-size: 1.95rem;
  font-weight: 700;
  color: var(--pbl-brass);
  line-height: 1.1;
  margin: 0.35rem 0 0.2rem;
}

.pbl-metric-note {
  font-size: 0.82rem;
  color: var(--pbl-mud-soft);
  margin: 0;
}

.pbl-status-badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 3px;
  font-family: var(--pbl-font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pbl-status-safe {
  background: #DEF7EC;
  color: #03543F;
  border: 1px solid #31C48D;
}

.pbl-status-warning {
  background: #FEF08A;
  color: #713F12;
  border: 1px solid #EAB308;
}

.pbl-status-danger {
  background: #FDE8E8;
  color: #9B1C1C;
  border: 1px solid #F98080;
}

.pbl-load-warning-box {
  background: #FFFBEB;
  border-left: 4px solid var(--pbl-brass);
  padding: 1rem 1.25rem;
  margin: 1.2rem 0;
  border-radius: 0 var(--pbl-radius) var(--pbl-radius) 0;
  font-size: 0.92rem;
}

/* Resonator Diagram Box */
.pbl-diagram-shell {
  background: #FFFFFF;
  border: 1px solid var(--pbl-border);
  border-radius: var(--pbl-radius);
  padding: 1.6rem;
  margin: 2rem 0;
}

.pbl-diagram-caption {
  font-size: 0.92rem;
  color: var(--pbl-mud-soft);
  margin-top: 0.8rem;
  font-style: italic;
  text-align: center;
}

/* Card Grids */
.pbl-grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 1.6rem 0;
}

.pbl-guide-card {
  background: var(--pbl-cotton-card);
  border: 1px solid var(--pbl-border);
  padding: 1.4rem;
  border-radius: var(--pbl-radius);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.pbl-guide-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(28, 25, 23, 0.08);
}

.pbl-guide-card h3 {
  margin-top: 0;
  font-size: 1.22rem;
}

.pbl-guide-card h3 a {
  color: var(--pbl-mud);
  text-decoration: none;
}

.pbl-guide-card h3 a:hover {
  color: var(--pbl-brass);
}

/* Callout Box */
.pbl-callout {
  background: #F3ECE0;
  border: 1px solid var(--pbl-border-dark);
  padding: 1.4rem 1.6rem;
  border-radius: var(--pbl-radius);
  margin: 1.8rem 0;
}

.pbl-callout-title {
  font-family: var(--pbl-font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--pbl-brass);
  margin-bottom: 0.5rem;
}

/* Footer & Colophon */
.pbl-footer {
  background: var(--pbl-mud);
  color: #EDE7DC;
  border-top: 5px solid var(--pbl-brass);
  padding: 3rem 0 2rem;
  font-size: 0.95rem;
}

.pbl-footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin-bottom: 2.4rem;
}

.pbl-footer h4 {
  color: #FFFFFF;
  font-size: 1.1rem;
  margin-bottom: 0.9rem;
  border-bottom: 1px solid #38322D;
  padding-bottom: 0.4rem;
}

.pbl-footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pbl-footer-links li {
  margin-bottom: 0.4rem;
}

.pbl-footer-links a {
  color: #D6CEBE;
  text-decoration: none;
}

.pbl-footer-links a:hover {
  color: var(--pbl-brass-glow);
  text-decoration: underline;
}

.pbl-footer-bottom {
  border-top: 1px solid #2D2723;
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: #9C9184;
}

.pbl-footer-bottom a {
  color: #BDB1A1;
}

.pbl-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}