/* ==========================================================================
   HARMONY ENGINE - STYLESHEET
   Aesthetic: Warm Retro-Modern Editorial / Luxury Audiophile & Music Theory
   ========================================================================== */

:root {
  /* Color Palette matching screenshot */
  --bg-canvas: #ECE4D6;
  --bg-canvas-subtle: #E2D7C5;
  --bg-card-dark: #1E140E;
  --bg-card-dark-inner: #291B13;
  --bg-card-dark-subtle: rgba(30, 20, 14, 0.05);

  --text-dark-primary: #18110B;
  --text-dark-secondary: #5F5348;
  --text-dark-muted: #8E8073;

  --text-light-primary: #FAF6F0;
  --text-light-secondary: #CBBFB3;
  --text-light-muted: #8C7C6E;

  --accent-orange: #FF5500;
  --accent-orange-hover: #E64C00;
  --accent-orange-soft: rgba(255, 85, 0, 0.12);
  --accent-orange-glow: rgba(255, 85, 0, 0.28);

  --gold-accent: #E5A93C;

  --border-dark: rgba(26, 17, 11, 0.12);
  --border-dark-subtle: rgba(26, 17, 11, 0.06);
  --border-light: rgba(255, 255, 255, 0.1);

  /* Typography */
  --font-display: 'Unbounded', -apple-system, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;

  /* Physics & Transitions */
  --ease-spring: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-smooth);
  --transition-normal: 0.4s var(--ease-spring);
  --transition-slow: 0.7s var(--ease-spring);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(30, 20, 14, 0.04);
  --shadow-md: 0 10px 30px rgba(30, 20, 14, 0.08);
  --shadow-lg: 0 20px 50px rgba(30, 20, 14, 0.12);
  --shadow-inner-glow: inset 0 1px 1px rgba(255, 255, 255, 0.12);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-canvas);
  color: var(--text-dark-primary);
  font-family: var(--font-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  width: 100%;
  max-width: 100vw;
  overflow-x: clip;
  overflow-x: hidden;
  overscroll-behavior-x: none;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  background-color: var(--bg-canvas);
  width: 100%;
  max-width: 100vw;
  overflow-x: clip;
  overflow-x: hidden;
  overscroll-behavior-x: none;
  position: relative;
  box-sizing: border-box;
}

/* Subtle Film Grain Texture Overlay */
.grain-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Typography Utilities */
.display-title {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.88;
  color: var(--text-dark-primary);
  text-transform: lowercase;
}

.orange-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  background-color: var(--accent-orange);
  border-radius: 50%;
  margin-left: 4px;
  vertical-align: baseline;
  box-shadow: 0 0 12px var(--accent-orange-glow);
}

.orange-dot-sm {
  width: 8px;
  height: 8px;
  margin-left: 2px;
}

/* Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.site-header {
  position: sticky;
  top: 16px;
  z-index: 100;
  width: 100%;
  padding: 0 24px;
  display: flex;
  justify-content: center;
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1240px;
  padding: 10px 20px;
  background: rgba(236, 228, 214, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 100px;
  border: 1px solid var(--border-dark);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-dark-primary);
}

.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--text-dark-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-canvas);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  text-transform: lowercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dark-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--text-dark-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-orange);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--bg-card-dark);
  color: var(--text-light-primary);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.btn-nav:hover {
  background: #2D1E15;
  transform: translateY(-1px);
}

.btn-nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  font-size: 0.7rem;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding-top: 40px;
  padding-bottom: 70px;
  position: relative;
}

.hero-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(3.5rem, 8.5vw, 7.8rem);
  line-height: 0.85;
}

.hero-title-accent {
  position: relative;
  display: inline-block;
}

.hero-subtitle-box {
  max-width: 320px;
  text-align: right;
  padding-bottom: 12px;
}

.hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--text-dark-secondary);
  font-weight: 500;
}

/* Hero Centerpiece Card */
.hero-card-stage {
  position: relative;
  width: 100%;
  margin-top: 10px;
}

/* Inset Dark Box matching screenshot */
.hero-dark-box {
  background-color: var(--bg-card-dark);
  border-radius: 36px;
  padding: 40px;
  color: var(--text-light-primary);
  display: grid;
  grid-template-columns: 1fr 340px 1fr;
  align-items: center;
  gap: 32px;
  min-height: 380px;
  box-shadow: var(--shadow-lg), var(--shadow-inner-glow);
  position: relative;
  overflow: visible;
  border: 1px solid var(--border-light);
}

.hero-speaker-wrapper {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: -60px;
  margin-bottom: -30px;
}

.hero-speaker-img {
  width: 330px;
  height: auto;
  border-radius: 28px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.45);
  transition: transform var(--transition-normal);
  filter: drop-shadow(0 20px 30px rgba(0,0,0,0.3));
}

.hero-speaker-wrapper:hover .hero-speaker-img {
  transform: translateY(-6px) scale(1.02);
}

/* Left Wing: Quote & Rating */
.hero-wing-left {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 0 16px;
}

.star-rating {
  color: var(--gold-accent);
  letter-spacing: 4px;
  font-size: 1.15rem;
}

.hero-quote {
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--text-light-secondary);
  font-style: italic;
  font-weight: 400;
}

.hero-quote-author {
  font-size: 0.85rem;
  color: var(--text-light-muted);
  font-weight: 500;
  margin-top: 4px;
}

/* Right Wing: Connectivity & Spec */
.hero-wing-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  gap: 16px;
  padding: 0 16px;
}

.tech-badges {
  display: flex;
  gap: 14px;
  color: #D48E44;
}

.tech-icon-pill {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(212, 142, 68, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.hero-tech-desc {
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--text-light-secondary);
  max-width: 240px;
}

/* Bottom Thumbnail Carousel Selector */
.hero-carousel-nav {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 10px;
}

.carousel-arrow {
  background: transparent;
  border: none;
  color: var(--text-light-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.carousel-arrow:hover {
  color: var(--text-light-primary);
  transform: scale(1.15);
}

.carousel-thumbnails {
  display: flex;
  gap: 12px;
}

.thumb-item {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1.5px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.thumb-item.active {
  border-color: var(--accent-orange);
  background: rgba(255, 85, 0, 0.15);
  transform: translateY(-2px);
}

.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   MARQUEE RIBBON BANNER
   ========================================================================== */
.marquee-ribbon-wrapper {
  margin: 40px 0 70px;
  overflow: hidden;
  position: relative;
  background: var(--accent-orange);
  padding: 16px 0;
  box-shadow: 0 8px 24px var(--accent-orange-glow);
}

.marquee-track {
  display: flex;
  white-space: nowrap;
  gap: 36px;
  animation: marquee-scroll 24s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  text-transform: lowercase;
  color: #1A110B;
  letter-spacing: -0.02em;
}

.marquee-icon {
  font-size: 1.2rem;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ==========================================================================
   SECTION: "КТО МЫ" (WHO WE ARE)
   ========================================================================== */
.who-section {
  padding: 40px 0 80px;
}

.who-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.who-col-left {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.section-heading-wrapper {
  position: relative;
  display: inline-flex;
  align-items: flex-start;
}

.section-title {
  font-size: clamp(3rem, 6.5vw, 5.8rem);
  line-height: 0.9;
}

.who-copy-lead {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-dark-secondary);
  max-width: 440px;
  font-weight: 450;
}

.who-col-right {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.who-top-copy {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.top-dot-indicator {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--accent-orange);
  border-radius: 50%;
  margin-bottom: 6px;
}

.who-copy-detail {
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text-dark-secondary);
  font-weight: 400;
}

.soundbar-card-wrapper {
  width: 100%;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-dark);
  background: var(--bg-canvas-subtle);
  transition: transform var(--transition-normal);
}

.soundbar-card-wrapper:hover {
  transform: translateY(-4px);
}

.soundbar-img {
  width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   SECTION: "НАШ ПРОДУКТ" (OUR PRODUCT)
   ========================================================================== */
.product-section {
  padding: 40px 0 90px;
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.product-col-left {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.product-copy {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--text-dark-secondary);
  max-width: 440px;
}

/* Category Stack */
.category-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.category-item {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 18px 24px;
  font-family: var(--font-body);
  font-size: 1.75rem;
  font-weight: 450;
  letter-spacing: -0.02em;
  color: var(--text-dark-primary);
  border-radius: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(26, 17, 11, 0.07);
  transition: all var(--transition-fast);
}

.category-item:hover:not(.active) {
  background: rgba(30, 20, 14, 0.04);
  transform: translateX(4px);
}

.category-item.active {
  background: var(--bg-card-dark);
  color: var(--text-light-primary);
  box-shadow: var(--shadow-md), var(--shadow-inner-glow);
  padding: 22px 28px;
  font-weight: 600;
  border-bottom: none;
}

.category-badge {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(255, 85, 0, 0.2);
  color: #FFA366;
}

/* Bottom Hardware Meter Banner */
.tuner-preview-wrapper {
  margin-top: 60px;
  border-radius: 36px 36px 16px 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-dark);
  background: var(--bg-canvas-subtle);
  position: relative;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.tuner-preview-img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.tuner-overlay-info {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  padding: 16px 24px;
  background: rgba(26, 17, 11, 0.85);
  backdrop-filter: blur(12px);
  border-radius: 18px;
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-light-primary);
}

.tuner-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.tuner-meta {
  font-size: 0.85rem;
  color: var(--text-light-secondary);
}

/* ==========================================================================
   FLOATING ACTION BUTTON (FAB) & AUDIO MODAL
   ========================================================================== */
.fab-button {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: var(--bg-card-dark);
  color: var(--text-light-primary);
  border: 1px solid var(--border-light);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 900;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.fab-button:hover {
  transform: scale(1.08) rotate(15deg);
  background: #2E1F16;
}

.fab-icon {
  font-size: 1.4rem;
  color: var(--accent-orange);
}

/* Audio Player Interactive Modal */
.audio-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20, 13, 8, 0.65);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  padding: 20px;
}

.audio-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.audio-modal-card {
  background: var(--bg-card-dark);
  color: var(--text-light-primary);
  border-radius: 28px;
  width: 100%;
  max-width: 520px;
  padding: 32px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
  border: 1px solid var(--border-light);
  transform: translateY(20px) scale(0.95);
  transition: transform var(--transition-normal);
}

.audio-modal-backdrop.open .audio-modal-card {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-light-muted);
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
}

.voice-meter-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 24px 0;
}

.voice-channel {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 14px;
  padding: 16px 8px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.voice-channel-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-orange);
}

.voice-level-bar {
  width: 12px;
  height: 80px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.voice-level-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(to top, var(--accent-orange), #FFA500);
  border-radius: 8px;
  transition: height 0.15s ease-out;
}

.chord-display {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  text-align: center;
  color: var(--text-light-primary);
  margin-bottom: 20px;
}

.modal-btn-play {
  width: 100%;
  padding: 16px;
  border-radius: 100px;
  background: var(--accent-orange);
  color: #1A110B;
  font-size: 1rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all var(--transition-fast);
}

.modal-btn-play:hover {
  background: var(--accent-orange-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--accent-orange-glow);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  padding: 40px 0 60px;
  border-top: 1px solid var(--border-dark);
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--text-dark-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-dark-secondary);
  text-decoration: none;
}

.footer-link:hover {
  color: var(--text-dark-primary);
}

/* ==========================================================================
   RESPONSIVE DESIGN (MOBILE COLLAPSE)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-dark-box {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 32px 24px;
    gap: 28px;
  }

  .hero-speaker-wrapper {
    margin-top: 0;
    margin-bottom: 0;
  }

  .hero-wing-left,
  .hero-wing-right {
    align-items: center;
    text-align: center;
    padding: 0;
  }

  .hero-tech-desc {
    max-width: 100%;
  }

  .who-grid,
  .product-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-subtitle-box {
    text-align: left;
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .hero-speaker-img {
    width: 240px;
  }

  .display-title {
    font-size: 2.8rem;
  }

  .category-item {
    font-size: 1.15rem;
    padding: 14px 18px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   SOLVER STUDIO SECTION & WORKSPACE
   ========================================================================== */
.solver-section {
  padding: 60px 0 100px;
  position: relative;
}

.solver-console {
  background: var(--bg-card-dark);
  color: var(--text-light-primary);
  border-radius: 36px;
  padding: 44px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg), var(--shadow-inner-glow);
  position: relative;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow-x: hidden;
}

.solver-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.solver-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-light-primary);
}

.solver-subtitle {
  font-size: 1.05rem;
  color: var(--text-light-secondary);
  max-width: 540px;
  margin-top: 10px;
  line-height: 1.5;
}

.solver-engine-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 85, 0, 0.15);
  border: 1px solid rgba(255, 85, 0, 0.3);
  color: #FFA366;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Sleek Machined Switcher Rail */
.solver-switcher-rail {
  display: inline-flex;
  background: rgba(0, 0, 0, 0.45);
  padding: 5px;
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
  margin-bottom: 32px;
  gap: 4px;
  position: relative;
  z-index: 50;
}

.solver-switch-pill {
  background: transparent;
  border: none;
  color: var(--text-light-muted);
  padding: 10px 24px;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer !important;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  transition: all var(--transition-fast);
  position: relative;
  z-index: 55;
  user-select: none;
}

.solver-switch-pill:hover:not(.active) {
  color: var(--text-light-primary);
  background: rgba(255, 255, 255, 0.04);
}

.solver-switch-pill.active {
  background: var(--accent-orange);
  color: #120B06;
  font-weight: 700;
  box-shadow: 0 4px 18px var(--accent-orange-glow);
}

.pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  transition: all var(--transition-fast);
}

.solver-switch-pill.active .pill-dot {
  background: #120B06;
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.4);
}

/* Tab Panes */
.solver-pane {
  display: none;
}

.solver-pane.active {
  display: block;
}

/* Preset Chips Row */
.preset-chips-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.preset-chip-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-light-secondary);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preset-chip-btn:hover {
  background: rgba(255, 85, 0, 0.15);
  border-color: rgba(255, 85, 0, 0.4);
  color: #FFA500;
}

/* Form Controls */
.solver-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.solver-form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.solver-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.solver-select,
.solver-input,
.solver-textarea {
  background: var(--bg-card-dark-inner);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-light-primary);
  padding: 12px 16px;
  border-radius: 14px;
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.solver-select:focus,
.solver-input:focus,
.solver-textarea:focus {
  border-color: var(--accent-orange);
  box-shadow: 0 0 0 3px var(--accent-orange-soft);
}

.solver-textarea {
  min-height: 90px;
  resize: vertical;
  line-height: 1.5;
}

.note-quick-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.chip-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-light-primary);
  padding: 5px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chip-btn:hover {
  background: var(--accent-orange);
  color: #120B06;
  border-color: var(--accent-orange);
}

/* Primary Solve Button (Button-in-Button Architecture) */
.btn-solve-primary {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 8px 10px 8px 28px;
  border-radius: 100px;
  background: var(--accent-orange);
  color: #120B06;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 24px var(--accent-orange-glow);
  transition: all var(--transition-fast);
}

.btn-solve-primary:hover:not(:disabled) {
  background: var(--accent-orange-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px var(--accent-orange-glow);
}

.btn-solve-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-icon-bubble {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(18, 11, 6, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #120B06;
  transition: transform var(--transition-fast);
}

.btn-solve-primary:hover:not(:disabled) .btn-icon-bubble {
  transform: translateX(2px);
}

/* Status Banner */
.solver-status-banner {
  margin-top: 20px;
  padding: 14px 20px;
  border-radius: 12px;
  font-size: 0.95rem;
  display: none;
}

.solver-status-banner.success {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6EE7B7;
}

.solver-status-banner.error {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #FCA5A5;
}

/* ==========================================================================
   RESULTS DISPLAY BOARD
   ========================================================================== */
.results-board {
  margin-top: 40px;
  padding-top: 36px;
  border-top: 1px solid var(--border-light);
  display: none;
}

.results-board.active {
  display: block;
}

.results-telemetry-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.telemetry-title-block h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}

.telemetry-meta {
  font-size: 0.9rem;
  color: var(--text-light-secondary);
  margin-top: 4px;
}

.telemetry-pills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.telemetry-pill {
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-light-primary);
}

.telemetry-pill.highlight {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.4);
  color: #34D399;
}

/* Multi-Variant Switcher Bar */
.variant-switcher-bar {
  background: rgba(18, 19, 23, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: 18px 22px;
  margin-bottom: 24px;
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.variant-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.variant-bar-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.variant-bar-icon {
  color: var(--accent-orange);
  display: flex;
  align-items: center;
  justify-content: center;
}

.variant-bar-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-light-primary);
}

.variant-bar-hint {
  font-size: 0.8rem;
  color: var(--text-light-muted);
}

.variant-chips-rail {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.variant-chip {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 12px 16px;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: left;
  flex: 1 1 230px;
  user-select: none;
}

.variant-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

.variant-chip.active {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.18) 0%, rgba(249, 115, 22, 0.04) 100%);
  border-color: rgba(249, 115, 22, 0.65);
  box-shadow: 0 4px 20px rgba(249, 115, 22, 0.18);
}

.variant-chip-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.variant-chip-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-light-primary);
}

.variant-chip.active .variant-chip-name {
  color: #FFA366;
}

.variant-chip-score {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-light-secondary);
  font-variant-numeric: tabular-nums;
}

.variant-chip.active .variant-chip-score {
  background: rgba(249, 115, 22, 0.25);
  color: #FFD2B2;
}

.variant-chip-desc {
  font-size: 0.78rem;
  color: var(--text-light-muted);
  line-height: 1.35;
}

/* Score Sheet Card & Controls */
.score-sheet-card {
  background: #FFFFFF;
  border-radius: 20px;
  padding: 16px 20px 20px 20px;
  margin-bottom: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.score-sheet-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 8px;
  border-bottom: 1px solid rgba(26, 17, 11, 0.08);
  flex-wrap: wrap;
  gap: 10px;
}

.score-toolbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.score-toolbar-title {
  font-family: 'Unbounded', sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  color: #18110B;
  letter-spacing: -0.01em;
}

.score-swipe-hint {
  display: none;
  font-size: 0.72rem;
  color: #FF5500;
  background: rgba(255, 85, 0, 0.08);
  padding: 3px 8px;
  border-radius: 12px;
  font-weight: 600;
  animation: pulse-hint 2s infinite;
}

@keyframes pulse-hint {
  0%, 100% { opacity: 0.85; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.03); }
}

@media (max-width: 768px) {
  .score-swipe-hint {
    display: inline-flex;
    align-items: center;
  }
}

.score-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.score-zoom-group {
  display: inline-flex;
  background: #F4EFEA;
  padding: 3px;
  border-radius: 10px;
  gap: 2px;
}

.score-tool-btn {
  background: transparent;
  border: none;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  color: #6C5E53;
  padding: 5px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.score-tool-btn:hover {
  color: #18110B;
}

.score-tool-btn.active {
  background: #FFFFFF;
  color: #FF5500;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.score-tool-btn.icon-only {
  background: #F4EFEA;
  color: #18110B;
  padding: 6px 12px;
  font-size: 0.95rem;
  line-height: 1;
}

.score-tool-btn.icon-only:hover {
  background: #FFE8D6;
  color: #FF5500;
}

/* Score Sheet Viewport */
.score-sheet-viewport {
  width: 100%;
  min-height: 180px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
  display: flex;
  align-items: center;
  padding: 4px 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(26, 17, 11, 0.25) transparent;
}

/* Scroll mode: default, keeps notes large, crisp and readable on mobile */
.score-sheet-viewport.mode-scroll {
  justify-content: flex-start;
}

.score-sheet-viewport.mode-scroll svg {
  min-width: 820px !important;
  width: 100% !important;
  max-width: none !important;
  height: auto !important;
  display: block;
  flex: 0 0 auto;
}

@media (max-width: 600px) {
  .score-sheet-viewport.mode-scroll svg {
    min-width: 720px !important;
  }
}

/* Fit mode: shrinks to fit screen without scrolling */
.score-sheet-viewport.mode-fit {
  justify-content: center;
}

.score-sheet-viewport.mode-fit svg {
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  display: block;
}

/* Lightbox Modal */
.score-lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(14, 10, 7, 0.88);
  backdrop-filter: blur(8px);
}

.lightbox-content {
  position: relative;
  width: 95vw;
  height: 92vh;
  background: #FFFFFF;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
  z-index: 2;
}

.lightbox-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: #F9F6F0;
  border-bottom: 1px solid rgba(26, 17, 11, 0.1);
  flex-wrap: wrap;
  gap: 10px;
}

.lightbox-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.lightbox-title {
  font-family: 'Unbounded', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  color: #18110B;
}

.lightbox-hint {
  font-size: 0.72rem;
  color: #8C7C6E;
}

.lightbox-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lightbox-btn {
  background: #EDE6DD;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: bold;
  color: #18110B;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.lightbox-btn:hover {
  background: #E0D4C5;
}

.lightbox-zoom-val {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  min-width: 42px;
  text-align: center;
  color: #18110B;
}

.lightbox-close-btn {
  background: rgba(201, 52, 36, 0.1);
  color: #C93424;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-size: 1.1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 6px;
  transition: all 0.15s ease;
}

.lightbox-close-btn:hover {
  background: rgba(201, 52, 36, 0.2);
}

.lightbox-body {
  flex: 1;
  overflow: auto;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #FFFDF9;
  -webkit-overflow-scrolling: touch;
}

.lightbox-body svg {
  max-width: none !important;
  display: block;
  transition: transform 0.15s ease;
  transform-origin: center center;
}

/* Audio Transport Deck */
.transport-deck {
  background: var(--bg-card-dark-inner);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.transport-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-transport-play {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent-orange);
  border: none;
  color: #1A110B;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 16px var(--accent-orange-glow);
  transition: transform var(--transition-fast);
}

.btn-transport-play:hover {
  transform: scale(1.06);
}

.transport-status-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-light-primary);
}

.transport-status-sub {
  font-size: 0.85rem;
  color: var(--text-light-muted);
}

.transport-center {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  max-width: 320px;
}

.tempo-slider-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light-secondary);
  white-space: nowrap;
}

.tempo-range-slider {
  flex: 1;
  accent-color: var(--accent-orange);
  cursor: pointer;
}

.transport-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Analysis Table */
.analysis-table-container {
  overflow-x: auto;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 28px;
}

.analysis-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  text-align: left;
}

.analysis-table th {
  background: rgba(255, 255, 255, 0.06);
  padding: 14px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.analysis-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-light-primary);
}

.analysis-table tr:hover {
  background: rgba(255, 255, 255, 0.04);
}

.analysis-table tr.playing-chord {
  background: rgba(255, 85, 0, 0.22) !important;
  outline: 1px solid var(--accent-orange);
}

.harmonic-func-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  background: rgba(255, 85, 0, 0.15);
  color: #FFA500;
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 0.85rem;
}

/* Export Actions */
.export-toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-export {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text-light-primary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-export:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}


/* ==========================================================================
   INTERACTIVE PIANO & LIVE NOTATION STAVE STUDIO
   ========================================================================== */

/* Live Stave Card */
.live-stave-card {
  background: #FFFDF9;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 18px 24px 16px 24px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.live-stave-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 1px solid rgba(26, 17, 11, 0.08);
  padding-bottom: 10px;
}

.stave-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stave-live-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #FF5500;
  box-shadow: 0 0 10px rgba(255, 85, 0, 0.8);
  position: relative;
}

.stave-live-indicator .pulse-dot {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: #FF5500;
  animation: pulse-ring 1.8s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(3); opacity: 0; }
}

.stave-card-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: #18110B;
  letter-spacing: -0.01em;
  margin: 0;
}

.stave-counter-pill {
  background: rgba(26, 17, 11, 0.06);
  color: #5F5348;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

.stave-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.stave-action-btn {
  background: rgba(26, 17, 11, 0.06);
  border: 1px solid rgba(26, 17, 11, 0.12);
  color: #18110B;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.stave-action-btn:hover {
  background: rgba(26, 17, 11, 0.12);
  transform: translateY(-1px);
}

.stave-action-btn.danger {
  color: #c93424;
}

.stave-action-btn.danger:hover {
  background: rgba(201, 52, 36, 0.1);
  border-color: rgba(201, 52, 36, 0.25);
}

/* Stave Canvas Paper */
.live-stave-paper {
  background: #FFFDF9;
  border-radius: 12px;
  overflow-x: auto;
  overflow-y: hidden;
  min-height: 140px;
  display: flex;
  align-items: center;
  padding: 4px 0;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.03);
}

.live-stave-svg {
  flex: 0 0 auto;
  min-width: 100%;
  height: 140px;
  display: block;
}

/* Under-Stave Clickable Chips Strip */
.stave-notes-strip {
  display: flex;
  gap: 6px;
  flex-wrap: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  margin-top: 8px;
  padding: 6px 2px;
  border-top: 1px dashed rgba(26, 17, 11, 0.12);
  min-height: 38px;
  max-height: 44px;
  align-items: center;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.stave-notes-strip::-webkit-scrollbar {
  height: 4px;
}

.stave-notes-strip::-webkit-scrollbar-track {
  background: rgba(26, 17, 11, 0.04);
  border-radius: 4px;
}

.stave-notes-strip::-webkit-scrollbar-thumb {
  background: rgba(26, 17, 11, 0.22);
  border-radius: 4px;
}

.stave-note-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  white-space: nowrap;
  background: #F2EBE0;
  border: 1px solid rgba(26, 17, 11, 0.12);
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: #18110B;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.stave-note-chip:hover {
  background: #FFE8D6;
  border-color: #FF5500;
  color: #FF5500;
  transform: translateY(-1px);
}

.stave-note-chip.last-added {
  border-color: #FF5500;
  background: rgba(255, 85, 0, 0.12);
  color: #FF5500;
}

.stave-note-chip .chip-del {
  font-size: 0.75rem;
  opacity: 0.6;
}

.stave-note-chip:hover .chip-del {
  opacity: 1;
}

/* Piano Toolbar */
.piano-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 14px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
}

.toolbar-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-light-muted);
}

.duration-selector-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.duration-pills {
  display: flex;
  gap: 6px;
}

.duration-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-light-primary);
  padding: 7px 14px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.duration-pill .dur-glyph {
  font-size: 1.1rem;
  line-height: 1;
}

.duration-pill:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.22);
}


.duration-dot-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-light-secondary);
  padding: 6px 14px;
  border-radius: 100px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  user-select: none;
}

.duration-dot-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-light-primary);
  border-color: rgba(255, 255, 255, 0.25);
}

.duration-dot-toggle.active {
  background: var(--accent-orange) !important;
  border-color: var(--accent-orange) !important;
  color: #FFFDF9 !important;
  box-shadow: 0 0 14px rgba(255, 85, 0, 0.35);
  font-weight: 800;
}

.duration-dot-toggle .dot-toggle-glyph {
  font-size: 1.3rem;
  line-height: 1;
  font-weight: 900;
}

.duration-pill.active {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
  color: #120B06;
  box-shadow: 0 4px 14px var(--accent-orange-glow);
}

.accidental-selector-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.accidental-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.accidental-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-light-primary);
  padding: 6px 14px;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.accidental-pill:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #FFF;
  border-color: rgba(255, 255, 255, 0.25);
}

.accidental-pill.active {
  background: var(--accent-orange);
  color: #1A110B;
  border-color: var(--accent-orange);
  font-weight: 700;
  box-shadow: 0 0 16px var(--accent-orange-glow);
}

.acc-glyph {
  font-size: 1.15rem;
  font-family: serif;
  font-weight: bold;
  line-height: 1;
}



.piano-toolbar-subgrid {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.piano-key-selector-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.piano-toolbar-select {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #FAF5EE;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: 100px;
  padding: 5px 14px;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
}

.piano-toolbar-select:hover,
.piano-toolbar-select:focus {
  background: rgba(255, 255, 255, 0.14);
  border-color: var(--accent-orange);
}

.piano-toolbar-select option {
  background: #1F1B18;
  color: #FAF5EE;
}

.piano-range-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.octave-controls {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 100px;
  padding: 3px;
}

.octave-btn {
  background: transparent;
  border: none;
  color: var(--text-light-primary);
  padding: 5px 12px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.octave-btn:hover {
  background: rgba(255, 255, 255, 0.14);
}

.octave-badge {
  padding: 0 10px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-orange);
}

/* Piano Keyboard Chassis & Keys */
.piano-keyboard-wrapper {
  margin-bottom: 24px;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 8px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  touch-action: pan-x pan-y;
}

.piano-chassis {
  background: linear-gradient(180deg, #1C140E 0%, #100A06 100%);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  padding: 14px 18px 20px 18px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.15);
  min-width: 860px;
}

.piano-fallboard {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 6px 12px 6px;
  border-bottom: 2px solid #2B1D13;
  margin-bottom: 12px;
}

.piano-brand-badge {
  font-family: 'Unbounded', sans-serif;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #D4A882;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
}

.piano-hint-text {
  font-size: 0.74rem;
  color: rgba(255, 255, 255, 0.45);
}

.piano-keys-bed {
  position: relative;
  height: 234px;
  user-select: none;
  border-radius: 0 0 14px 14px;
  background: #080604;
  box-shadow: inset 0 -8px 16px rgba(0, 0, 0, 0.75);
  padding: 0;
  overflow: visible;
}

.piano-white-keys-layer {
  display: flex;
  position: relative;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.piano-black-keys-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  pointer-events: none;
}

.piano-key-white {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  max-width: none;
  height: 228px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8F5F0 75%, #E6DDD2 100%);
  border: 1px solid #B8ACA0;
  border-top: none;
  border-radius: 0 0 8px 8px;
  box-shadow: inset 0 2px 0 #FFF, inset 0 -5px 0 #C7BCB0, 0 4px 8px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: 12px;
  transition: transform 0.04s ease, background 0.04s ease, box-shadow 0.04s ease;
}

.piano-key-white:hover {
  background: linear-gradient(180deg, #FFFFFF 0%, #FAF8F5 75%, #EEE7DC 100%);
  box-shadow: inset 0 2px 0 #FFF, inset 0 -5px 0 #C7BCB0, 0 6px 12px rgba(0, 0, 0, 0.4);
}

.piano-key-white.active,
.piano-key-white:active {
  background: linear-gradient(180deg, #FFF0E5 0%, #FFD6BA 75%, #FFA366 100%) !important;
  box-shadow: inset 0 3px 8px rgba(255, 85, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.25) !important;
  transform: translateY(4px);
}

.piano-white-key-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  pointer-events: none;
}

.piano-key-hint {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.64rem;
  font-weight: 800;
  color: #7A695A;
  background: rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
  margin-bottom: 3px;
  user-select: none;
  line-height: 1.1;
}

.piano-key-label-eng {
  font-size: 0.88rem;
  font-weight: 800;
  color: #221810;
  line-height: 1.1;
  user-select: none;
}

.piano-key-label-solf {
  font-size: 0.72rem;
  color: #8A7B6D;
  font-weight: 600;
  line-height: 1.1;
  user-select: none;
}

.piano-key-black {
  position: absolute;
  top: 0;
  width: 30px;
  height: 144px;
  margin-left: -15px; /* Centers 30px black key precisely on the seam between white keys */
  background: linear-gradient(180deg, #38281C 0%, #1D140D 50%, #0E0905 100%);
  border: 1px solid #000;
  border-top: none;
  border-radius: 0 0 6px 6px;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.3), inset 0 -3px 0 rgba(255, 255, 255, 0.06), 0 6px 14px rgba(0, 0, 0, 0.75);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 8px 2px 10px 2px;
  pointer-events: auto;
  transition: transform 0.04s ease, background 0.04s ease, box-shadow 0.04s ease;
}

.piano-key-black:hover {
  background: linear-gradient(180deg, #483424 0%, #2A1D13 50%, #150E08 100%);
}

.piano-key-black.active,
.piano-key-black:active {
  background: linear-gradient(180deg, #FF661A 0%, #CC4400 70%, #993300 100%) !important;
  box-shadow: 0 0 16px rgba(255, 85, 0, 0.9), inset 0 1px 2px #FFD9CC !important;
  transform: translateY(3px);
}

.piano-key-hint-black {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  font-weight: 800;
  color: #FFA366;
  background: rgba(255, 85, 0, 0.2);
  border: 1px solid rgba(255, 85, 0, 0.45);
  padding: 1px 4px;
  border-radius: 4px;
  user-select: none;
  line-height: 1.1;
  pointer-events: none;
}

.piano-black-key-labels {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
  width: 100%;
  pointer-events: none;
  user-select: none;
}

.black-key-val {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  line-height: 1.05;
  cursor: pointer;
  pointer-events: auto;
  border-radius: 4px;
  padding: 1px 2px;
  transition: background 0.15s ease, transform 0.1s ease;
}

.black-key-val:hover {
  background: rgba(255, 255, 255, 0.14);
}

.black-key-val:active {
  transform: scale(0.94);
}

.black-key-val.val-secondary:hover {
  background: rgba(255, 163, 102, 0.25);
}

.black-key-val.val-secondary:hover .black-val-eng {
  color: #FFFDF9;
}

.black-key-val.val-secondary:hover .black-val-solf {
  color: #FFA366;
}

.black-key-val.val-primary .black-val-eng {
  color: #FFFDF9;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.black-key-val.val-primary .black-val-solf {
  color: #FFA366;
  font-size: 0.60rem;
  font-weight: 700;
}

.black-key-seam-line {
  width: 60%;
  height: 1px;
  background: rgba(255, 255, 255, 0.15);
  margin: 1px 0;
}

.black-key-val.val-secondary .black-val-eng {
  color: rgba(250, 245, 238, 0.45);
  font-size: 0.64rem;
  font-weight: 600;
}

.black-key-val.val-secondary .black-val-solf {
  color: rgba(212, 168, 130, 0.45);
  font-size: 0.52rem;
  font-weight: 500;
}

/* Accordion for Manual Text Input */
.manual-notes-accordion {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 10px 16px;
  transition: all var(--transition-fast);
}

.manual-notes-summary {
  font-size: 0.85rem;
  color: var(--text-light-muted);
  cursor: pointer;
  font-weight: 600;
  user-select: none;
}

.manual-notes-summary:hover {
  color: var(--text-light-primary);
}


/* ==========================================================================
   DEFINITIVE MOBILE & TABLET RESPONSIVE ADAPTATION (PERFECT MOBILE EXPERIENCE)
   Prevents any horizontal viewport blowout; scrolls piano internally.
   ========================================================================== */

/* Universal mobile layout locks */
html, body {
  width: 100% !important;
  max-width: 100vw !important;
  overflow-x: clip !important;
  overflow-x: hidden !important;
  overscroll-behavior-x: none !important;
  position: relative !important;
  box-sizing: border-box !important;
  margin: 0 !important;
  padding: 0 !important;
}

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

main, section, header, footer,
.container,
.hero-section,
.hero-card-stage,
.hero-dark-box,
.marquee-ribbon-wrapper,
.who-section,
.who-grid,
.product-section,
.product-grid,
.tuner-preview-wrapper,
.solver-section,
.solver-console,
.live-stave-card,
.piano-toolbar,
.piano-keyboard-wrapper,
.manual-notes-accordion,
.btn-solve-primary,
.results-board,
.score-sheet-card,
.transport-deck,
.analysis-table-container {
  max-width: 100% !important;
  box-sizing: border-box !important;
}

/* Contain marquee banner strictly within viewport */
.marquee-ribbon-wrapper {
  overflow: hidden !important;
  contain: paint !important;
  width: 100% !important;
  max-width: 100vw !important;
}

/* Internal horizontal scrolling elements with gesture isolation */
.live-stave-paper,
.piano-keyboard-wrapper,
.score-sheet-card,
.preset-chips-row,
.analysis-table-container {
  overflow-x: auto !important;
  -webkit-overflow-scrolling: touch !important;
  overscroll-behavior-x: contain !important;
  scrollbar-width: thin !important;
}

@media (max-width: 992px) {
  .solver-section {
    padding: 35px 0 60px;
  }

  .solver-console {
    border-radius: 26px;
    padding: 28px 20px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 12px !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  /* Header & Navigation */
  .site-header {
    top: 8px !important;
    padding: 0 10px !important;
    width: 100% !important;
  }

  .nav-shell {
    padding: 8px 14px !important;
    width: 100% !important;
    border-radius: 100px !important;
  }

  .nav-links {
    display: none !important;
  }

  .brand-name {
    font-size: 1.15rem !important;
  }

  .btn-nav {
    padding: 7px 12px !important;
    font-size: 0.8rem !important;
  }

  /* Hero Section */
  .hero-section {
    padding: 16px 0 28px !important;
  }

  .display-title.hero-title {
    font-size: 2.1rem !important;
    line-height: 1.05 !important;
    margin-bottom: 12px !important;
    word-break: break-word !important;
  }

  .hero-subtitle {
    font-size: 0.92rem !important;
    line-height: 1.45 !important;
  }

  .hero-card-stage {
    width: 100% !important;
    margin-top: 14px !important;
  }

  .hero-dark-box {
    grid-template-columns: 1fr !important;
    padding: 24px 16px !important;
    border-radius: 20px !important;
    gap: 20px !important;
    min-height: auto !important;
    text-align: center !important;
  }

  .hero-speaker-wrapper {
    margin: 0 auto !important;
    width: 100% !important;
    max-width: 220px !important;
  }

  .hero-speaker-img {
    width: 100% !important;
    max-width: 220px !important;
    height: auto !important;
  }

  .hero-wing-left,
  .hero-wing-right {
    padding: 0 !important;
    align-items: center !important;
    text-align: center !important;
  }

  .hero-quote {
    font-size: 0.88rem !important;
    line-height: 1.4 !important;
    max-width: 100% !important;
  }

  .hero-tech-desc {
    font-size: 0.82rem !important;
    max-width: 100% !important;
  }

  .hero-carousel-nav {
    gap: 8px !important;
    margin-top: 6px !important;
  }

  .thumb-item {
    width: 44px !important;
    height: 44px !important;
  }

  /* Who We Are Section */
  .who-section {
    padding: 24px 0 36px !important;
  }

  .who-grid {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .who-copy-lead {
    font-size: 1rem !important;
    line-height: 1.5 !important;
  }

  .who-copy-detail {
    font-size: 0.88rem !important;
    line-height: 1.45 !important;
  }

  .soundbar-card-wrapper {
    border-radius: 18px !important;
    width: 100% !important;
  }

  /* Product Section & Categories */
  .product-section {
    padding: 24px 0 36px !important;
  }

  .product-grid {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .product-copy {
    font-size: 0.92rem !important;
    line-height: 1.45 !important;
  }

  .category-stack {
    gap: 6px !important;
    width: 100% !important;
  }

  .category-item,
  .category-item.active {
    font-size: 0.92rem !important;
    padding: 12px 14px !important;
    border-radius: 12px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 8px !important;
    width: 100% !important;
    box-sizing: border-box !important;
    text-align: left !important;
  }

  .category-item span:first-child {
    flex: 1 1 auto !important;
    word-break: normal !important;
  }

  .category-badge {
    font-size: 0.7rem !important;
    padding: 3px 8px !important;
    flex-shrink: 0 !important;
    white-space: nowrap !important;
  }

  /* Tuner Banner Mobile Card */
  .tuner-preview-wrapper {
    margin-top: 24px !important;
    border-radius: 20px !important;
    width: 100% !important;
    overflow: hidden !important;
  }

  .tuner-preview-img {
    max-height: 200px !important;
    width: 100% !important;
    object-fit: cover !important;
  }

  .tuner-overlay-info {
    position: static !important;
    padding: 16px 14px !important;
    border-radius: 0 0 20px 20px !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 12px !important;
    background: var(--bg-card-dark) !important;
    border-top: 1px solid var(--border-light) !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .tuner-title {
    font-size: 0.98rem !important;
    line-height: 1.25 !important;
  }

  .tuner-meta {
    font-size: 0.78rem !important;
    line-height: 1.35 !important;
    margin-top: 4px !important;
  }

  .tuner-overlay-info .btn-nav {
    width: 100% !important;
    justify-content: center !important;
    padding: 11px 16px !important;
    font-size: 0.88rem !important;
    border-radius: 100px !important;
  }

  /* Solver Studio & Piano Console */
  .solver-section {
    padding: 20px 0 40px !important;
    overflow-x: hidden !important;
    width: 100% !important;
  }

  .solver-console {
    border-radius: 18px !important;
    padding: 16px 10px !important;
    overflow-x: hidden !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .solver-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
    margin-bottom: 12px !important;
  }

  .solver-title {
    font-size: 1.6rem !important;
    line-height: 1.1 !important;
  }

  .solver-subtitle {
    font-size: 0.84rem !important;
    line-height: 1.4 !important;
    margin-top: 4px !important;
  }

  .solver-engine-badge {
    font-size: 0.7rem !important;
    padding: 4px 10px !important;
  }

  .preset-chips-row {
    display: flex !important;
    overflow-x: auto !important;
    flex-wrap: nowrap !important;
    gap: 6px !important;
    padding-bottom: 6px !important;
    margin-bottom: 12px !important;
    -webkit-overflow-scrolling: touch !important;
    overscroll-behavior-x: contain !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .preset-chip-btn {
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    padding: 6px 11px !important;
    font-size: 0.74rem !important;
  }

  .solver-form-grid {
    grid-template-columns: 1fr !important;
    gap: 10px !important;
    margin-bottom: 14px !important;
    width: 100% !important;
  }

  .solver-select {
    padding: 10px 12px !important;
    font-size: 0.88rem !important;
    width: 100% !important;
  }

  /* Live Notation Staff */
  .live-stave-card {
    border-radius: 14px !important;
    padding: 10px 8px !important;
    margin-bottom: 10px !important;
    overflow: hidden !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .stave-notes-strip {
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    white-space: nowrap !important;
    min-height: 36px !important;
    max-height: 40px !important;
    padding: 4px 2px !important;
    margin-top: 6px !important;
    gap: 5px !important;
    -webkit-overflow-scrolling: touch !important;
  }

  .stave-note-chip {
    padding: 2px 7px !important;
    font-size: 0.72rem !important;
    gap: 4px !important;
    flex-shrink: 0 !important;
    white-space: nowrap !important;
  }

  .live-stave-header {
    gap: 6px !important;
    margin-bottom: 8px !important;
    flex-wrap: wrap !important;
  }

  .stave-card-title {
    font-size: 0.88rem !important;
  }

  .stave-counter-pill {
    font-size: 0.68rem !important;
    padding: 3px 7px !important;
  }

  .stave-actions {
    gap: 4px !important;
    margin-left: auto !important;
  }

  .stave-action-btn {
    padding: 5px 8px !important;
    font-size: 0.72rem !important;
  }

  .live-stave-paper {
    min-height: 120px !important;
    overflow-x: auto !important;
    overscroll-behavior-x: contain !important;
    -webkit-overflow-scrolling: touch !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .live-stave-svg {
    height: 120px !important;
    flex: 0 0 auto !important;
  }

  /* Piano Toolbar */
  .piano-toolbar {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 10px !important;
    padding: 10px !important;
    border-radius: 14px !important;
    margin-bottom: 12px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .duration-selector-group,
  .accidental-selector-group {
    width: 100% !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 4px !important;
  }

  .piano-toolbar-subgrid {
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
    width: 100% !important;
  }

  .piano-key-selector-group,
  .piano-range-group {
    width: 100% !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 4px !important;
  }

  .piano-toolbar-select {
    width: 100% !important;
    padding: 5px 8px !important;
    font-size: 0.74rem !important;
  }

  .octave-badge {
    font-size: 0.65rem !important;
    padding: 4px 6px !important;
    white-space: nowrap !important;
  }

  .octave-btn {
    padding: 4px 7px !important;
    font-size: 0.72rem !important;
  }

  .accidental-pills {
    width: 100% !important;
    max-width: 100% !important;
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    touch-action: pan-x !important;
    overscroll-behavior-x: contain !important;
    scrollbar-width: none !important;
    gap: 5px !important;
    padding: 2px 2px 6px 2px !important;
    box-sizing: border-box !important;
  }

  .accidental-pills::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
  }

  .accidental-pill {
    flex: 1 0 46px !important;
    min-width: 46px !important;
    padding: 6px 2px !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 2px !important;
    border-radius: 9px !important;
    font-size: 0.62rem !important;
    text-align: center !important;
    box-sizing: border-box !important;
  }

  .acc-glyph {
    font-size: 1.05rem !important;
    line-height: 1 !important;
  }

  .duration-pills {
    width: 100% !important;
    max-width: 100% !important;
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    touch-action: pan-x !important;
    overscroll-behavior-x: contain !important;
    scrollbar-width: none !important;
    gap: 5px !important;
    padding: 2px 2px 6px 2px !important;
    box-sizing: border-box !important;
  }

  .duration-pills::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
  }

  .duration-dot-toggle {
    flex: 1 0 52px !important;
    min-width: 52px !important;
    padding: 6px 2px !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 2px !important;
    border-radius: 9px !important;
    font-size: 0.65rem !important;
    text-align: center !important;
    box-sizing: border-box !important;
  }

  .duration-dot-toggle .dot-toggle-glyph {
    font-size: 1.3rem !important;
    line-height: 1 !important;
    font-weight: 900 !important;
  }

  .duration-pill {
    flex: 1 0 48px !important;
    min-width: 48px !important;
    padding: 6px 2px !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 2px !important;
    border-radius: 9px !important;
    font-size: 0.65rem !important;
    text-align: center !important;
    box-sizing: border-box !important;
  }

  .duration-pill .dur-glyph {
    font-size: 1.15rem !important;
    line-height: 1 !important;
  }

  .octave-controls {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    gap: 6px !important;
  }

  .octave-btn {
    padding: 7px 10px !important;
    font-size: 0.76rem !important;
    flex-shrink: 0 !important;
  }

  .octave-badge {
    flex: 1 !important;
    text-align: center !important;
    font-size: 0.7rem !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  /* Piano Chassis & Keyboard Bed */
  .piano-keyboard-wrapper {
    overflow-x: auto !important;
    overflow-y: hidden !important;
    -webkit-overflow-scrolling: touch !important;
    overscroll-behavior-x: contain !important;
    touch-action: pan-x pan-y !important;
    margin-bottom: 16px !important;
    padding-bottom: 6px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .piano-chassis {
    min-width: 660px !important;
    padding: 8px 6px 12px 6px !important;
    border-radius: 12px !important;
    box-sizing: border-box !important;
  }

  .piano-fallboard {
    padding: 0 2px 6px 2px !important;
    margin-bottom: 6px !important;
  }

  .piano-brand-badge {
    display: none !important;
  }

  .piano-hint-text {
    width: 100% !important;
    text-align: center !important;
    font-size: 0.7rem !important;
    color: #FFA366 !important;
  }

  .piano-keys-bed {
    height: 180px !important;
  }

  .piano-key-white {
    height: 174px !important;
    min-width: 26px !important;
    padding-bottom: 8px !important;
  }

  .piano-key-hint {
    display: none !important;
  }

  .piano-key-label-eng {
    font-size: 0.74rem !important;
  }

  .piano-key-label-solf {
    font-size: 0.6rem !important;
  }

  .piano-key-black {
    height: 110px !important;
    width: 24px !important;
    margin-left: -12px !important;
    padding: 6px 1px 8px 1px !important;
  }

  .piano-key-hint-black {
    display: none !important;
  }

  .black-key-val.val-primary .black-val-eng {
    font-size: 0.68rem !important;
  }

  .black-key-val.val-primary .black-val-solf {
    font-size: 0.52rem !important;
  }

  .black-key-val.val-secondary .black-val-eng {
    font-size: 0.56rem !important;
  }

  .black-key-val.val-secondary .black-val-solf {
    font-size: 0.46rem !important;
  }

  .btn-solve-primary {
    width: 100% !important;
    display: flex !important;
    justify-content: center !important;
    padding: 13px 18px !important;
    font-size: 0.95rem !important;
    border-radius: 100px !important;
    box-sizing: border-box !important;
  }

  .manual-notes-accordion {
    padding: 8px 10px !important;
    border-radius: 10px !important;
    margin-bottom: 14px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .results-board {
    margin-top: 18px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .results-telemetry-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 8px !important;
  }

  .telemetry-title-block h3 {
    font-size: 1.15rem !important;
  }

  .telemetry-pills {
    width: 100% !important;
    flex-wrap: wrap !important;
    gap: 4px !important;
  }

  .telemetry-pill {
    font-size: 0.68rem !important;
    padding: 3px 6px !important;
  }

  .score-sheet-card {
    padding: 10px 10px 14px 10px !important;
    border-radius: 14px !important;
    min-height: 150px !important;
    margin-bottom: 14px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .transport-deck {
    padding: 12px 10px !important;
    border-radius: 14px !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 10px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .transport-left {
    width: 100% !important;
    justify-content: space-between !important;
  }

  .transport-right {
    width: 100% !important;
    justify-content: space-between !important;
  }

  .export-toolbar {
    width: 100% !important;
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 6px !important;
  }

  .btn-export {
    justify-content: center !important;
    padding: 8px 6px !important;
    font-size: 0.76rem !important;
  }

  .analysis-table th,
  .analysis-table td {
    padding: 7px 5px !important;
    font-size: 0.74rem !important;
  }
}

@media (max-width: 480px) {
  .display-title.hero-title {
    font-size: 1.85rem !important;
  }

  .solver-title {
    font-size: 1.45rem !important;
  }

  .export-toolbar {
    grid-template-columns: 1fr !important;
  }

  .duration-pill {
    font-size: 0.65rem !important;
  }

  .accidental-pill {
    font-size: 0.58rem !important;
    padding: 6px 1px !important;
  }

  .category-item,
  .category-item.active {
    font-size: 0.88rem !important;
    padding: 10px 12px !important;
  }
}


/* ==========================================================================
   CADENCE ARCHITECTURE PLAN (DUBOVSKY NORMATIVE CANON)
   ========================================================================== */
.cadence-plan-card {
  background: var(--bg-card-dark);
  border: 1px solid rgba(229, 169, 60, 0.35);
  border-radius: 20px;
  padding: 22px 24px;
  margin-bottom: 20px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35), 0 0 20px rgba(229, 169, 60, 0.08);
  animation: fadeIn 0.3s ease-out;
}

.cadence-plan-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.cadence-plan-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-light-primary);
  letter-spacing: -0.01em;
}

.cadence-plan-icon {
  font-size: 1.3rem;
}

.cadence-plan-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 100px;
  background: rgba(229, 169, 60, 0.16);
  color: #E5A93C;
  border: 1px solid rgba(229, 169, 60, 0.3);
}

.cadence-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 640px) {
  .cadence-grid {
    grid-template-columns: 1fr !important;
  }
  .dur-word {
    display: none !important;
  }
}

.cadence-box {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 14px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.cadence-box.medial {
  border-left: 4px solid #38BDF8;
}

.cadence-box.final {
  border-left: 4px solid #FF5500;
}

.cadence-box-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.cadence-box-tag {
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 6px;
  padding: 3px 8px;
}

.cadence-box.medial .cadence-box-tag {
  background: rgba(56, 189, 248, 0.15);
  color: #38BDF8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.cadence-box.final .cadence-box-tag {
  background: rgba(255, 85, 0, 0.18);
  color: #FF5500;
  border: 1px solid rgba(255, 85, 0, 0.35);
}

.cadence-box-measure {
  font-size: 0.72rem;
  color: var(--text-light-muted);
  font-weight: 600;
}

.cadence-box-type {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-light-primary);
  line-height: 1.25;
}

.cadence-box-formula {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.35);
  padding: 6px 10px;
  border-radius: 8px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  color: #FFA366;
  width: fit-content;
  border: 1px solid rgba(255, 163, 102, 0.2);
}

.cadence-box-desc {
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--text-light-secondary);
}

/* Cadence badges inside analysis table */
.cadence-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
  white-space: nowrap;
}

.cadence-chip.medial {
  background: rgba(56, 189, 248, 0.16);
  color: #38BDF8;
  border: 1px solid rgba(56, 189, 248, 0.35);
}

.cadence-chip.final {
  background: rgba(255, 85, 0, 0.18);
  color: #FF5500;
  border: 1px solid rgba(255, 85, 0, 0.4);
}

tr.row-cadence-medial td {
  background-color: rgba(56, 189, 248, 0.04) !important;
}

tr.row-cadence-final td {
  background-color: rgba(255, 85, 0, 0.05) !important;
}


/* =============================================
   Task Pedagogical Theme Card (Dubovsky)
   ============================================= */
.task-theme-card {
  background: var(--bg-card-dark, #161b22);
  border: 1px solid rgba(138, 92, 246, 0.45);
  border-radius: 20px;
  padding: 20px 24px;
  margin-bottom: 20px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35), 0 0 20px rgba(138, 92, 246, 0.12);
  animation: fadeIn 0.3s ease-out;
}

.task-theme-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.task-theme-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display, inherit);
  font-size: 1.08rem;
  font-weight: 700;
  color: #c4b5fd;
  letter-spacing: -0.01em;
}

.task-theme-badge {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 9999px;
  background: rgba(138, 92, 246, 0.18);
  color: #c4b5fd;
  border: 1px solid rgba(138, 92, 246, 0.35);
}

.task-theme-desc {
  font-size: 0.92rem;
  line-height: 1.55;
  color: #cbd5e1;
  margin-bottom: 12px;
}

.task-theme-advice {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(15, 23, 42, 0.55);
  border-radius: 12px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.task-theme-advice-item {
  font-size: 0.86rem;
  line-height: 1.45;
  color: #94a3b8;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.task-theme-advice-item::before {
  content: "•";
  color: #a78bfa;
  font-weight: bold;
}