/* ===================================================================
   LOOPBACK AUDIO — Custom Design System
   Loaded at priority 80 (after theme.css at 90, so this WINS on overlap)
   Last updated: 2026-10-18

   Sections:
     1. Design tokens (color / spacing / type / radius / shadow)
     2. Typography scale (responsive clamp)
     3. Layout primitives
     4. Component: .lb-card
     5. Component: .lb-chip / .lb-metric / .lb-feature
     6. Component: .lb-cta-button
     7. Component: .lb-pull-quote / .lb-callout / .lb-step
     8. Component: .lb-compare-table
     9. Navbar enhancements (sticky, grouped, mobile)
    10. Footer enhancements
    11. Section dividers + visual rhythm
    12. Animations: hover-lift, fade-up, glow
    13. Responsive: 5 breakpoints
    14. Accessibility: focus ring, sr-only
   =================================================================== */


/* ----- 1. Design tokens ----- */
:root {
  /* Brand */
  --lb-accent:        #FF6B35;        /* primary orange */
  --lb-accent-2:      #22D3EE;        /* secondary cyan */
  --lb-accent-2-deep: #0891B2;        /* deep cyan for hover */
  --lb-accent-glow:   rgba(255, 107, 53, 0.18);
  --lb-accent-2-glow:  rgba(34, 211, 238, 0.15);

  /* Gradients */
  --lb-grad-hero: radial-gradient(ellipse 80% 60% at 30% 0%, rgba(34, 211, 238, 0.10) 0%, transparent 60%),
                  radial-gradient(ellipse 70% 50% at 90% 100%, rgba(255, 107, 53, 0.12) 0%, transparent 60%),
                  linear-gradient(180deg, #0a0c10 0%, #0e1015 100%);
  --lb-grad-cta:  linear-gradient(135deg, #FF6B35 0%, #FF8559 50%, #22D3EE 100%);
  --lb-grad-text: linear-gradient(135deg, #FF6B35 0%, #22D3EE 100%);

  /* Surfaces */
  --lb-bg-deep:     #0a0c10;
  --lb-bg-card:     rgba(255, 255, 255, 0.035);
  --lb-bg-card-hi:  rgba(255, 255, 255, 0.06);
  --lb-border:      rgba(255, 255, 255, 0.08);
  --lb-border-hi:   rgba(255, 255, 255, 0.16);

  /* Text */
  --lb-text-1: #f0f2f5;
  --lb-text-2: #a8b0bd;
  --lb-text-3: #6a7280;

  /* Spacing */
  --lb-s-1: 4px;  --lb-s-2: 8px;  --lb-s-3: 12px;  --lb-s-4: 16px;
  --lb-s-5: 24px; --lb-s-6: 32px; --lb-s-7: 48px; --lb-s-8: 64px;
  --lb-s-9: 96px;

  /* Radius */
  --lb-r-1: 6px;  --lb-r-2: 10px; --lb-r-3: 16px; --lb-r-4: 24px;

  /* Shadow */
  --lb-shadow-1: 0 2px 8px rgba(0, 0, 0, 0.25);
  --lb-shadow-2: 0 8px 32px rgba(0, 0, 0, 0.35), 0 0 0 1px var(--lb-border);
  --lb-shadow-3: 0 20px 60px rgba(255, 107, 53, 0.20), 0 0 0 1px var(--lb-border-hi);
}


/* ----- 2. Typography scale (responsive via clamp) ----- */
body, .lb-body {
  font-size: 16px;
  line-height: 1.65;
  color: var(--lb-text-1);
  font-feature-settings: "ss01" 1, "cv11" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Cal Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--lb-text-1);
}

h1 {
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 var(--lb-s-5);
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  margin: var(--lb-s-8) 0 var(--lb-s-5);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  margin: var(--lb-s-6) 0 var(--lb-s-3);
}

h4 {
  font-size: 1.125rem;
  margin: var(--lb-s-5) 0 var(--lb-s-2);
  font-weight: 600;
}

p, li, dd, dt {
  color: var(--lb-text-2);
  font-size: 1rem;
  line-height: 1.7;
}

p {
  margin: 0 0 var(--lb-s-4);
}

strong, b {
  color: var(--lb-text-1);
  font-weight: 600;
}

a {
  color: var(--lb-accent);
  text-decoration: none;
  transition: color 0.18s ease, opacity 0.18s ease;
}

a:hover {
  color: var(--lb-accent-2);
}

a:focus-visible {
  outline: 2px solid var(--lb-accent-2);
  outline-offset: 3px;
  border-radius: 2px;
}

code, kbd, pre {
  font-family: 'SF Mono', 'JetBrains Mono', 'Berkeley Mono', ui-monospace, monospace;
  font-size: 0.9em;
  background: var(--lb-bg-card);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--lb-text-1);
}

hr {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lb-border), transparent);
  margin: var(--lb-s-8) 0;
}

ul, ol {
  margin: 0 0 var(--lb-s-4);
  padding-left: var(--lb-s-5);
}

li {
  margin-bottom: var(--lb-s-2);
  padding-left: var(--lb-s-1);
}

li::marker {
  color: var(--lb-accent);
}


/* ----- 3. Layout primitives ----- */
.lb-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--lb-s-5);
}

.lb-container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--lb-s-5);
}

.lb-section {
  padding: var(--lb-s-8) 0;
  position: relative;
}

.lb-section--hero {
  padding: var(--lb-s-9) 0 var(--lb-s-8);
  background: var(--lb-grad-hero);
  border-radius: 0 0 var(--lb-r-4) var(--lb-r-4);
  margin-bottom: var(--lb-s-7);
  overflow: hidden;
}

.lb-section--hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  background-position: -1px -1px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 80%);
}

.lb-section--hero > * {
  position: relative;
  z-index: 1;
}

.lb-grid {
  display: grid;
  gap: var(--lb-s-5);
}

.lb-grid--2 { grid-template-columns: repeat(2, 1fr); }
.lb-grid--3 { grid-template-columns: repeat(3, 1fr); }
.lb-grid--4 { grid-template-columns: repeat(4, 1fr); }
.lb-grid--6 { grid-template-columns: repeat(6, 1fr); }

.lb-stack { display: flex; flex-direction: column; gap: var(--lb-s-4); }
.lb-row   { display: flex; align-items: center; gap: var(--lb-s-3); flex-wrap: wrap; }


/* ----- 4. Component: .lb-card ----- */
.lb-card {
  background: var(--lb-bg-card);
  border: 1px solid var(--lb-border);
  border-radius: var(--lb-r-3);
  padding: var(--lb-s-5);
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease, box-shadow 0.22s ease;
  position: relative;
  overflow: hidden;
}

.lb-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lb-border-hi), transparent);
}

.lb-card:hover {
  transform: translateY(-2px);
  background: var(--lb-bg-card-hi);
  border-color: var(--lb-border-hi);
  box-shadow: var(--lb-shadow-2);
}

.lb-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--lb-r-2);
  background: linear-gradient(135deg, var(--lb-accent-glow) 0%, var(--lb-accent-2-glow) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--lb-accent);
  margin-bottom: var(--lb-s-4);
  flex-shrink: 0;
}

.lb-card__icon--cyan   { background: var(--lb-accent-2-glow); color: var(--lb-accent-2); }
.lb-card__icon--orange { background: var(--lb-accent-glow);   color: var(--lb-accent); }

.lb-card__icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 1.75;
  fill: none;
}

.lb-card__title {
  font-family: 'Cal Sans', 'Inter', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--lb-text-1);
  margin: 0 0 var(--lb-s-2);
  letter-spacing: -0.01em;
}

.lb-card__desc {
  font-size: 0.9375rem;
  color: var(--lb-text-2);
  line-height: 1.6;
  margin: 0;
}


/* ----- 5. Component: .lb-chip / .lb-metric / .lb-feature ----- */
.lb-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--lb-s-2);
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--lb-bg-card);
  border: 1px solid var(--lb-border);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--lb-text-2);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.lb-chip--orange { color: var(--lb-accent);   border-color: rgba(255, 107, 53, 0.25); }
.lb-chip--cyan   { color: var(--lb-accent-2); border-color: rgba(34, 211, 238, 0.25); }

.lb-chip__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: lb-pulse 2s ease-in-out infinite;
}

@keyframes lb-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.8); }
}

.lb-metric {
  text-align: left;
  padding: var(--lb-s-4) 0;
}

.lb-metric__value {
  font-family: 'Cal Sans', 'Inter', sans-serif;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  background: var(--lb-grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--lb-s-2);
}

.lb-metric__label {
  font-size: 0.875rem;
  color: var(--lb-text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.lb-feature {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--lb-s-4);
  align-items: flex-start;
  padding: var(--lb-s-5);
  background: var(--lb-bg-card);
  border: 1px solid var(--lb-border);
  border-radius: var(--lb-r-3);
  transition: all 0.22s ease;
}

.lb-feature:hover {
  border-color: var(--lb-accent);
  background: var(--lb-bg-card-hi);
}

.lb-feature__num {
  font-family: 'Cal Sans', 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--lb-accent);
  background: var(--lb-bg-card);
  border: 1px solid var(--lb-border);
  border-radius: var(--lb-r-1);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}


/* ----- 6. Component: .lb-cta-button ----- */
.lb-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--lb-s-2);
  padding: 14px 28px;
  border-radius: var(--lb-r-2);
  background: var(--lb-grad-cta);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.01em;
  border: none;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  position: relative;
  overflow: hidden;
}

.lb-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.5);
  color: #fff;
}

.lb-cta:active { transform: translateY(0); }

.lb-cta--ghost {
  background: transparent;
  border: 1px solid var(--lb-border-hi);
  color: var(--lb-text-1);
  box-shadow: none;
}

.lb-cta--ghost:hover {
  background: var(--lb-bg-card);
  border-color: var(--lb-accent);
  color: var(--lb-text-1);
}

.lb-cta--cyan {
  background: linear-gradient(135deg, #22D3EE 0%, #0891B2 100%);
  box-shadow: 0 4px 14px rgba(34, 211, 238, 0.35);
}

.lb-cta--cyan:hover {
  box-shadow: 0 8px 24px rgba(34, 211, 238, 0.5);
  color: #fff;
}

.lb-cta__arrow {
  transition: transform 0.18s ease;
}

.lb-cta:hover .lb-cta__arrow { transform: translateX(3px); }


/* ----- 7. Component: .lb-pull-quote / .lb-callout / .lb-step ----- */
.lb-pull-quote {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.06) 0%, rgba(255, 107, 53, 0.06) 100%);
  border-left: 3px solid var(--lb-accent-2);
  padding: var(--lb-s-5) var(--lb-s-6);
  border-radius: 0 var(--lb-r-2) var(--lb-r-2) 0;
  margin: var(--lb-s-6) 0;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--lb-text-1);
}

.lb-pull-quote strong:first-child,
.lb-pull-quote b:first-child {
  color: var(--lb-accent-2);
  margin-right: 6px;
}

.lb-callout {
  background: rgba(34, 211, 238, 0.06);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-left: 3px solid var(--lb-accent-2);
  border-radius: var(--lb-r-2);
  padding: var(--lb-s-4) var(--lb-s-5);
  margin: var(--lb-s-5) 0;
  color: var(--lb-text-1);
}

.lb-callout--orange {
  background: rgba(255, 107, 53, 0.06);
  border-color: rgba(255, 107, 53, 0.2);
  border-left-color: var(--lb-accent);
}

.lb-callout__label {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--lb-accent-2);
  font-weight: 700;
  margin-bottom: 4px;
}

.lb-step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: var(--lb-s-4);
  padding: var(--lb-s-5) 0;
  border-bottom: 1px solid var(--lb-border);
}

.lb-step:last-child { border-bottom: none; }

.lb-step__num {
  font-family: 'Cal Sans', 'Inter', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--lb-accent-2);
  background: var(--lb-bg-card);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: var(--lb-r-1);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lb-step__title {
  font-family: 'Cal Sans', 'Inter', sans-serif;
  font-weight: 700;
  color: var(--lb-text-1);
  font-size: 1.125rem;
  margin: 0 0 4px;
}

.lb-step__desc {
  color: var(--lb-text-2);
  margin: 0;
  font-size: 0.9375rem;
}


/* ----- 8. Component: .lb-compare-table ----- */
.lb-compare {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--lb-bg-card);
  border: 1px solid var(--lb-border);
  border-radius: var(--lb-r-2);
  overflow: hidden;
  margin: var(--lb-s-5) 0;
  font-size: 0.9375rem;
}

.lb-compare th, .lb-compare td {
  padding: var(--lb-s-3) var(--lb-s-4);
  text-align: left;
  border-bottom: 1px solid var(--lb-border);
}

.lb-compare tr:last-child th,
.lb-compare tr:last-child td { border-bottom: none; }

.lb-compare th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--lb-text-1);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.lb-compare td {
  color: var(--lb-text-2);
}

.lb-compare tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}


/* ----- 9. Navbar enhancements ----- */
#header {
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: rgba(10, 12, 16, 0.75) !important;
  border-bottom: 1px solid var(--lb-border);
}

#header .navbar-brand img,
#header .navbar-brand svg {
  height: 52px;
  width: auto;
  transition: transform 0.2s ease;
}

#header .navbar-brand:hover img { transform: rotate(-3deg); }

#header .navigation a {
  color: var(--lb-text-2);
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--lb-r-1);
  transition: color 0.18s ease, background 0.18s ease;
}

#header .navigation a:hover {
  color: var(--lb-text-1);
  background: var(--lb-bg-card);
}

#header .navigation a.active {
  color: var(--lb-text-1);
  background: var(--lb-bg-card);
  box-shadow: inset 0 -2px 0 var(--lb-accent);
}


/* ----- 10. Footer enhancements ----- */
#footer {
  margin-top: var(--lb-s-9);
  padding: var(--lb-s-8) 0 var(--lb-s-6);
  background: linear-gradient(180deg, transparent 0%, rgba(10, 12, 16, 0.6) 100%);
  border-top: 1px solid var(--lb-border);
}

#footer a {
  color: var(--lb-text-2);
  transition: color 0.18s ease;
}

#footer a:hover {
  color: var(--lb-accent-2);
}

.lb-footer-metric {
  display: flex;
  gap: var(--lb-s-6);
  padding: var(--lb-s-5) 0;
  border-top: 1px solid var(--lb-border);
  border-bottom: 1px solid var(--lb-border);
  margin: var(--lb-s-6) 0;
  flex-wrap: wrap;
}

.lb-footer-metric__item {
  flex: 1 1 0;
  min-width: 140px;
}


/* ----- 11. Section dividers + visual rhythm ----- */
section + section { margin-top: var(--lb-s-7); }

h2::before {
  content: "";
  display: block;
  width: 32px;
  height: 3px;
  background: var(--lb-grad-cta);
  border-radius: 2px;
  margin-bottom: var(--lb-s-4);
}

h3::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lb-accent-2);
  margin-right: 8px;
  vertical-align: middle;
}


/* ----- 12. Animations ----- */
@keyframes lb-fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.lb-fade-up {
  animation: lb-fade-up 0.6s ease-out both;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}


/* ----- 13. Responsive — wider containers, full coverage ----- */

/* Reduced motion handled in section 12 (prefers-reduced-motion block below the .lb-fade-up keyframes) */

/* ===== WIDE-SCREEN TIERS (large → small) ===== */

/* 4K / ultrawide — most generous */
@media (min-width: 2560px) {
  body                        { font-size: 19px; line-height: 1.65; }
  .lb-container               { max-width: 1920px; padding: 0 var(--lb-s-8); }
  .lb-container-wide          { max-width: 2240px; padding: 0 var(--lb-s-8); }
  .lb-grid                    { gap: 2.5rem; }
  .lb-section                 { padding: var(--lb-s-9) 0; }
  .lb-section--hero           { padding: 128px 0 112px; }
  .lb-card                    { padding: var(--lb-s-6); }
  .lb-metric__value           { font-size: 2.25rem; }
  #header .navbar-brand img,
  #header .navbar-brand svg   { height: 72px; }
}

/* 1920x1080 / 2K — main target */
@media (min-width: 1920px) and (max-width: 2559px) {
  body                        { font-size: 18px; line-height: 1.6; }
  .lb-container               { max-width: 1680px; padding: 0 var(--lb-s-7); }
  .lb-container-wide          { max-width: 1880px; padding: 0 var(--lb-s-7); }
  .lb-grid                    { gap: 2rem; }
  .lb-section                 { padding: 96px 0; }
  .lb-section--hero           { padding: 112px 0 96px; }
  .lb-card                    { padding: 28px; }
  .lb-metric__value           { font-size: 2rem; }
  #header .navbar-brand img,
  #header .navbar-brand svg   { height: 64px; }
}

/* 1680-1919: 17" laptop / standard desktop */
@media (min-width: 1680px) and (max-width: 1919px) {
  body                        { font-size: 17px; }
  .lb-container               { max-width: 1480px; padding: 0 var(--lb-s-6); }
  .lb-container-wide          { max-width: 1680px; padding: 0 var(--lb-s-6); }
  .lb-grid                    { gap: 1.75rem; }
  .lb-section--hero           { padding: 96px 0 80px; }
}

/* 1440-1679: 13-15" laptop */
@media (min-width: 1440px) and (max-width: 1679px) {
  body                        { font-size: 16.5px; }
  .lb-container               { max-width: 1320px; padding: 0 var(--lb-s-5); }
  .lb-container-wide          { max-width: 1440px; padding: 0 var(--lb-s-5); }
  .lb-grid                    { gap: 1.5rem; }
}

/* 1200-1439: small desktop */
@media (min-width: 1200px) and (max-width: 1439px) {
  body                        { font-size: 16.5px; }
  .lb-container               { max-width: 1180px; }
  .lb-container-wide          { max-width: 1300px; }
  .lb-grid                    { gap: 1.25rem; }
}

/* 1024-1199: tablet landscape / small laptop */
@media (min-width: 1024px) and (max-width: 1199px) {
  body                        { font-size: 16px; }
  .lb-container               { max-width: 1000px; }
  .lb-container-wide          { max-width: 1100px; }
  .lb-grid                    { gap: 1.25rem; }
}

/* ===== MID-TIER (tablet) ===== */

/* ≤1023px: tablet portrait — first collapse */
@media (max-width: 1023px) {
  body                        { font-size: 16px; }
  .lb-grid--4                 { grid-template-columns: repeat(2, 1fr); }
  .lb-grid--6                 { grid-template-columns: repeat(3, 1fr); }
  .lb-grid--3                 { grid-template-columns: repeat(2, 1fr); }
  #header .navbar-brand img,
  #header .navbar-brand svg   { height: 44px; }
}

/* ≤767px: large phone / small tablet */
@media (max-width: 767px) {
  .lb-container               { padding: 0 var(--lb-s-4); }
  .lb-section--hero           { padding: var(--lb-s-8) 0 var(--lb-s-7); }
  .lb-grid                    { gap: var(--lb-s-4); }
}

/* ≤639px: phone — second collapse */
@media (max-width: 639px) {
  .lb-grid--6                 { grid-template-columns: repeat(2, 1fr); }
  .lb-grid--4                 { grid-template-columns: 1fr 1fr; }
  .lb-grid--3                 { grid-template-columns: 1fr 1fr; }
  .lb-grid--2                 { grid-template-columns: 1fr; }
}

/* ≤480px: small phone — final collapse */
@media (max-width: 480px) {
  body                        { font-size: 15px; }
  .lb-grid--6                 { grid-template-columns: 1fr; }
  .lb-grid--4                 { grid-template-columns: 1fr; }
  .lb-grid--3                 { grid-template-columns: 1fr; }
  h1                          { font-size: 1.875rem; }
  h2                          { font-size: 1.5rem; }
  h3                          { font-size: 1.125rem; }
  #header .navbar-brand img,
  #header .navbar-brand svg   { height: 36px; }
  .lb-card                    { padding: var(--lb-s-4); }
  .lb-section                 { padding: var(--lb-s-6) 0; }
  .lb-cta                     { padding: 12px 22px; font-size: 0.9375rem; }
  .lb-footer-metric           { gap: var(--lb-s-4); }
  .lb-footer-metric__item     { min-width: 100%; }
}
/* ----- 14. Accessibility ----- */
:focus-visible {
  outline: 2px solid var(--lb-accent-2);
  outline-offset: 3px;
}

.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;
}


/* ----- 15. Audio Converter tool (loopbackaudio.com/tools/audio-converter) ----- */
.lb-tool { padding: 18px; }

.lb-dropzone {
  border: 2px dashed color-mix(in oklab, var(--lb-accent) 32%, transparent);
  border-radius: 14px;
  padding: 36px 18px;
  text-align: center;
  background: color-mix(in oklab, var(--lb-accent) 4%, transparent);
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
  user-select: none;
}
.lb-dropzone:hover { border-color: var(--lb-accent); }
.lb-dropzone:focus-visible { outline: 2px solid var(--lb-accent-2); outline-offset: 3px; }
.lb-dropzone--drag {
  border-color: var(--lb-accent);
  background: color-mix(in oklab, var(--lb-accent) 9%, transparent);
  transform: scale(1.01);
}
.lb-dropzone-icon  { font-size: 32px; line-height: 1; margin-bottom: 10px; }
.lb-dropzone-title { font-weight: 600; font-size: 1.0625rem; color: var(--lb-text-1); margin-bottom: 4px; }
.lb-dropzone-sub   { color: var(--lb-text-2); font-size: 0.875rem; }

.lb-file-info {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  background: color-mix(in oklab, var(--lb-accent) 5%, var(--lb-bg-card));
  border: 1px solid var(--lb-border);
}
.lb-file-row { display: flex; align-items: center; gap: 12px; }
.lb-file-icon  { font-size: 22px; line-height: 1; }
.lb-file-name  { font-weight: 600; color: var(--lb-text-1); word-break: break-all; }
.lb-file-size  { color: var(--lb-text-2); font-size: 0.85rem; }

.lb-format-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin: 16px 0 10px;
}
@media (max-width: 640px) { .lb-format-grid { grid-template-columns: repeat(3, 1fr); } }
.lb-fmt-card {
  appearance: none;
  background: var(--lb-bg-card);
  border: 1px solid var(--lb-border);
  color: var(--lb-text-1);
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 8px;
  border-radius: 10px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease, background .15s ease, transform .12s ease;
}
.lb-fmt-card:hover { transform: translateY(-1px); border-color: color-mix(in oklab, var(--lb-accent) 50%, var(--lb-border)); }
.lb-fmt-card--active {
  border-color: var(--lb-accent);
  background: color-mix(in oklab, var(--lb-accent) 12%, var(--lb-bg-card));
  color: var(--lb-accent);
}
:root[data-theme='dark'] .lb-fmt-card--active { background: color-mix(in oklab, var(--lb-accent) 18%, #1a1d24); }
.lb-fmt-card__sub { display: block; font-size: 0.7rem; font-weight: 400; opacity: 0.7; margin-top: 2px; }

.lb-quality-row {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px; color: var(--lb-text-2); font-size: 0.9rem;
}
.lb-quality-row select {
  font: inherit; padding: 6px 10px; border-radius: 8px;
  background: var(--lb-bg-card); color: var(--lb-text-1);
  border: 1px solid var(--lb-border);
}

.lb-progress { margin-top: 14px; }
.lb-progress-bar {
  height: 8px; border-radius: 4px;
  background: color-mix(in oklab, var(--lb-text-1) 8%, transparent);
  overflow: hidden;
}
.lb-progress-fill {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--lb-accent), var(--lb-accent-2));
  width: 0;
  transition: width .25s ease;
}
.lb-progress-text {
  margin-top: 8px;
  font-size: 0.85rem; color: var(--lb-text-2);
}

.lb-result {
  margin-top: 18px;
  padding: 18px;
  border-radius: 12px;
  border: 1px solid color-mix(in oklab, var(--lb-accent-2) 45%, transparent);
  background: color-mix(in oklab, var(--lb-accent-2) 6%, var(--lb-bg-card));
}
.lb-result-title { font-size: 1.125rem; font-weight: 600; color: var(--lb-accent-2); margin-bottom: 12px; }
.lb-result-row { margin-bottom: 12px; }
.lb-result-name { font-weight: 600; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.875rem; word-break: break-all; }
.lb-result-stats {
  margin-top: 6px; font-size: 0.875rem; color: var(--lb-text-2);
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
}
.lb-result-arrow { color: var(--lb-accent); }
.lb-audio-preview { width: 100%; max-width: 460px; margin: 14px 0 6px; }
.lb-link-btn {
  appearance: none; background: transparent; border: 0;
  color: var(--lb-text-2); cursor: pointer; text-decoration: underline;
  font: inherit; margin-left: 12px; padding: 4px 0;
}

.lb-callout--err {
  border-left: 4px solid #ff5252;
  background: color-mix(in oklab, #ff5252 8%, var(--lb-bg-card));
  color: var(--lb-text-1);
}

.lb-samples {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 14px 0 0;
}
@media (max-width: 768px) { .lb-samples { grid-template-columns: 1fr; } }
.lb-sample-card {
  appearance: none; text-align: left;
  background: var(--lb-bg-card);
  border: 1px solid var(--lb-border);
  border-radius: 10px;
  padding: 14px;
  cursor: pointer;
  font: inherit; color: inherit;
  transition: border-color .15s ease, transform .12s ease;
}
.lb-sample-card:hover { border-color: var(--lb-accent); transform: translateY(-1px); }
.lb-sample-card__name { font-weight: 600; margin-bottom: 4px; }
.lb-sample-card__meta { font-size: 0.8rem; color: var(--lb-text-2); }


/* ----- 15b. Fix: explicit grid placement for lb-step (number in col 1, title+desc in col 2) ----- */
.lb-step__num    { grid-column: 1; }
.lb-step__title  { grid-column: 2; }
.lb-step__desc   { grid-column: 2; margin-top: 4px; }


/* ----- 5b. Component: .lb-metric-grid ----- */
/* Used by home page "By the Numbers" section. Default 2 cols,
   scales up at every tier. */
.lb-metric-grid {
  display: grid;
  gap: var(--lb-s-4);
  grid-template-columns: repeat(2, 1fr);
}

.lb-metric-grid > .lb-metric {
  padding: var(--lb-s-5) var(--lb-s-4);
  border: 1px solid var(--lb-border);
  border-radius: var(--lb-r-2);
  background: var(--lb-bg-card);
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
  text-align: left;
}
.lb-metric-grid > .lb-metric:hover {
  border-color: color-mix(in oklab, var(--lb-accent) 50%, var(--lb-border));
  transform: translateY(-2px);
  box-shadow: var(--lb-shadow-1);
}

/* Mobile+ (small screens still get 3 cols for visual rhythm) */
@media (min-width: 480px) {
  .lb-metric-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Tablet+ : 6 cols in a single row to match wide design */
@media (min-width: 1024px) {
  .lb-metric-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: var(--lb-s-4);
  }
  .lb-metric-grid > .lb-metric {
    padding: var(--lb-s-5) var(--lb-s-4);
  }
}

/* Wide screens: even more breathing room + bigger value */
@media (min-width: 1440px) {
  .lb-metric-grid { gap: var(--lb-s-5); }
}
@media (min-width: 1920px) and (max-width: 2559px) {
  .lb-metric-grid {
    gap: var(--lb-s-6);
    grid-template-columns: repeat(6, 1fr);
  }
  .lb-metric-grid > .lb-metric__value,
  .lb-metric-grid > .lb-metric .lb-metric__value { font-size: 2.5rem; }
  .lb-metric-grid > .lb-metric {
    padding: var(--lb-s-6) var(--lb-s-4);
  }
}
@media (min-width: 2560px) {
  .lb-metric-grid { gap: var(--lb-s-7); }
  .lb-metric-grid > .lb-metric__value,
  .lb-metric-grid > .lb-metric .lb-metric__value { font-size: 3rem; }
}


/* ----- 15c. v2 audio converter UX additions ----- */
.lb-browse-row {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-top: 12px;
}
.lb-browse-hint {
  font-size: 0.825rem; color: var(--lb-text-2); flex: 1;
}

.lb-file-warning {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  background: color-mix(in oklab, #FFB300 8%, var(--lb-card-bg));
  border-left: 3px solid #FFB300;
  color: var(--lb-text-1);
  font-size: 0.875rem;
  line-height: 1.5;
}

.lb-engine-status {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 14px 0 4px;
  padding: 8px 14px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--lb-accent-2) 8%, var(--lb-card-bg));
  border: 1px solid color-mix(in oklab, var(--lb-accent-2) 30%, transparent);
  font-size: 0.875rem;
  color: var(--lb-text-1);
}
.lb-engine-status__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--lb-accent-2);
  box-shadow: 0 0 8px var(--lb-accent-2-glow);
  animation: lb-engine-pulse 2s ease-in-out infinite;
}
@keyframes lb-engine-pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.85); }
  50%      { opacity: 1;   transform: scale(1.1); }
}

.lb-cta--block { display: block; width: 100%; text-align: center; }
.lb-cta--sm    { padding: 8px 14px; font-size: 0.875rem; }
.lb-cta--lg    { padding: 14px 28px; font-size: 1.0625rem; }
.lb-cta--disabled {
  background: color-mix(in oklab, var(--lb-fg) 8%, var(--lb-card-bg)) !important;
  color: var(--lb-text-2) !important;
  cursor: not-allowed;
  box-shadow: none !important;
}

.lb-error-title { font-weight: 600; margin-bottom: 6px; }
.lb-error-msg   { margin-bottom: 10px; line-height: 1.5; }
.lb-error-detail {
  display: none;
  margin: 8px 0;
  padding: 10px 12px;
  background: color-mix(in oklab, #000 30%, var(--lb-card-bg));
  color: var(--lb-text-2);
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.75rem;
  line-height: 1.45;
  max-height: 220px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.lb-error-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-top: 4px; }
.lb-link-btn--primary { color: var(--lb-accent); font-weight: 600; }


/* ----- 16. Quark2 theme width override -----
   The default Quark2 theme wraps every page body inside
   `#body-wrapper > .container > .content-item` with max-width 960px,
   which silently overrides our .lb-container wider settings.
   We override that chain at every breakpoint below so the wider
   1680 / 1920 px layout actually applies. */

/* Default (small) — keep theme's 960 / 1200 caps */
#body-wrapper > .container                       { max-width: 1200px; }
#body-wrapper > .container > .content-item       { max-width: 960px; }

/* 1024–1199: tablet landscape */
@media (min-width: 1024px) and (max-width: 1199px) {
  #body-wrapper > .container                 { max-width: 1000px; }
  #body-wrapper > .container > .content-item { max-width: 1000px; }
}

/* 1200–1439: small desktop */
@media (min-width: 1200px) and (max-width: 1439px) {
  #body-wrapper > .container                 { max-width: 1180px; }
  #body-wrapper > .container > .content-item { max-width: 1180px; }
}

/* 1440–1679: 13–15" laptop */
@media (min-width: 1440px) and (max-width: 1679px) {
  #body-wrapper > .container                 { max-width: 1320px; }
  #body-wrapper > .container > .content-item { max-width: 1320px; }
}

/* 1680–1919: 17" laptop / standard desktop */
@media (min-width: 1680px) and (max-width: 1919px) {
  #body-wrapper > .container                 { max-width: 1480px; padding-inline: 32px; }
  #body-wrapper > .container > .content-item { max-width: 1480px; }
}

/* 1920–2559: FHD / 2K — main target (user's monitor) */
@media (min-width: 1920px) and (max-width: 2559px) {
  #body-wrapper > .container                 { max-width: 1680px; padding-inline: clamp(1.25rem, 2vw, 2.5rem); }
  #body-wrapper > .container > .content-item { max-width: 1680px; }
}

/* 2560+: 4K / ultrawide */
@media (min-width: 2560px) {
  #body-wrapper > .container                 { max-width: 1920px; padding-inline: clamp(1.5rem, 2vw, 3rem); }
  #body-wrapper > .container > .content-item { max-width: 1920px; }
}

/* On mobile/tablet, fall back to theme defaults (don't lock to 960) */
@media (max-width: 1023px) {
  #body-wrapper > .container                 { max-width: 100%; padding-inline: var(--lb-s-4); }
  #body-wrapper > .container > .content-item { max-width: 100%; }
}



/* ----- 15d. Selected file card (rich UI for showFile()) ----- */
.lb-file-card {
  margin-top: 14px;
  padding: 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, color-mix(in oklab, var(--lb-accent) 5%, var(--lb-card-bg)) 0%, var(--lb-card-bg) 100%);
  border: 1px solid color-mix(in oklab, var(--lb-accent-2) 35%, var(--lb-border));
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: lb-file-card-in 0.32s ease-out both;
}
@keyframes lb-file-card-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.lb-file-card--warn {
  border-color: #FFB300;
  background: linear-gradient(135deg, color-mix(in oklab, #FFB300 7%, var(--lb-card-bg)) 0%, var(--lb-card-bg) 100%);
}

.lb-file-card__header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.lb-file-card__icon {
  font-size: 24px;
  line-height: 1.1;
  flex-shrink: 0;
}
.lb-file-card__title {
  flex: 1; min-width: 0;
}
.lb-file-card__name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--lb-text-1);
  word-break: break-all;
  line-height: 1.35;
}
.lb-file-card__sub {
  font-size: 0.8125rem;
  color: var(--lb-text-2);
  margin-top: 3px;
}
.lb-file-card__remove {
  appearance: none; background: transparent; border: 0;
  font-size: 22px; line-height: 1;
  color: var(--lb-text-2);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 6px;
  transition: background .15s ease, color .15s ease;
}
.lb-file-card__remove:hover {
  background: color-mix(in oklab, #ff5252 12%, transparent);
  color: #ff5252;
}

.lb-file-card__privacy {
  display: flex;
}
.lb-privacy-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--lb-accent-2) 12%, var(--lb-card-bg));
  border: 1px solid color-mix(in oklab, var(--lb-accent-2) 35%, transparent);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--lb-accent-2);
}
.lb-privacy-badge__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--lb-accent-2);
  box-shadow: 0 0 6px var(--lb-accent-2-glow);
}

.lb-file-card__flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  padding: 14px;
  background: color-mix(in oklab, #000 18%, var(--lb-card-bg));
  border-radius: 10px;
  border: 1px solid var(--lb-border);
}
.lb-flow-step {
  text-align: center;
}
.lb-flow-step__label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--lb-text-3);
  margin-bottom: 6px;
}
.lb-flow-step__value {
  font-family: 'Cal Sans', 'Inter', sans-serif;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--lb-text-1);
  line-height: 1.15;
}
.lb-flow-step--target .lb-flow-step__value {
  background: var(--lb-grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lb-flow-step__hint {
  font-size: 0.6875rem;
  color: var(--lb-text-3);
  margin-top: 4px;
}
.lb-flow-arrow {
  color: var(--lb-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lb-file-card__next {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  background: color-mix(in oklab, var(--lb-accent) 7%, var(--lb-card-bg));
  border-radius: 8px;
  border: 1px dashed color-mix(in oklab, var(--lb-accent) 35%, transparent);
  font-size: 0.875rem;
  color: var(--lb-text-1);
  line-height: 1.5;
}
.lb-next-badge {
  flex-shrink: 0;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--lb-accent);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

@media (max-width: 480px) {
  .lb-file-card__flow {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .lb-flow-arrow {
    transform: rotate(90deg);
    align-self: center;
    justify-self: center;
  }
}