/* ============================================================
   SONOFINITY — DESIGN TOKENS
   ============================================================ */
:root {
  --sono-bg: #050505;
  --sono-bg-elevated: #0A0A0A;
  --sono-bg-card: #0D0D0D;
  --sono-bg-card-hover: #111111;
  --sono-text: #F2F2F0;
  --sono-text-dim: #8A8A85;
  --sono-text-muted: #555550;
  --sono-accent: #01B3A4;
  --sono-highlight: #5CF0E8;
  --sono-accent-glow: rgba(1, 179, 164, 0.25);
  --sono-highlight-glow: rgba(0, 254, 254, 0.15);
  --sono-border: rgba(242, 242, 240, 0.06);
  --sono-border-accent: rgba(1, 179, 164, 0.3);
  --sono-font-display: 'Outfit', sans-serif;
  --sono-font-body: 'DM Sans', sans-serif;
  --sono-font-mono: 'JetBrains Mono', monospace;
  --sono-radius: 4px;
  --sono-radius-lg: 8px;
  --sono-transition: cubic-bezier(0.22, 1, 0.36, 1);
  --sono-nav-width: 72px;
}

/* ============================================================
   RESET — scoped to .sono-page
   ============================================================ */
.sono-page,
.sono-page *,
.sono-page *::before,
.sono-page *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.sono-page {
  font-family: var(--sono-font-body);
  background: var(--sono-bg);
  color: var(--sono-text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  min-height: 100vh;
}

.sono-page a { color: inherit; }

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--sono-accent) var(--sono-bg);
  overflow-x: hidden;
}

.sono-page ::-webkit-scrollbar { width: 4px; }
.sono-page ::-webkit-scrollbar-track { background: var(--sono-bg); }
.sono-page ::-webkit-scrollbar-thumb { background: var(--sono-accent); border-radius: 4px; }

/* ============================================================
   NAVIGATION — fixed left sidebar
   ============================================================ */
.sono-nav {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sono-nav-width);
  height: 100vh;
  background: rgba(5, 5, 5, 0.85);
  border-right: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: visible;	
  justify-content: space-between;
  padding: 0 0 24px 0;
  z-index: 99999;
  transition: transform 0.5s var(--sono-transition);
}

/* Small logo in nav */
.sono-nav__logo {
  background: #000;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sono-nav__logo-img {
  width: 100%;
  height: auto;
  display: block;
  filter: none;
  object-fit: contain;
}

/* Big logo at top of hero — scrolls with page */
.sono-hero__top-logo {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 5;
  display: flex;
  justify-content: center;
  padding: 20px 0;
  background: radial-gradient(ellipse at center, #000 0%, #000 40%, transparent 70%);
  background-size: 100% 100%;
  background-position: center;
  box-shadow: 0 8px 24px rgba(0, 254, 254, 0.15), 0 4px 12px rgba(0, 0, 0, 0.8);
  animation: sonoLogoBreathe 6s ease-in-out infinite;
}

@keyframes sonoLogoBreathe {
  0%, 100% {
    background-size: 200% 100%;
  }
  50% {
    background-size: 80% 100%;
  }
}

.sono-hero__top-logo-img {
  width: clamp(280px, 35vw, 280px);
  height: auto;
  display: block;
  filter: none;
}

.sono-nav__links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  list-style: none;
  padding-top: 80px;
}

.sono-nav.scrolled .sono-nav__links {
  padding-top: 80px;
}

.sono-nav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 8px;
  text-decoration: none;
  color: var(--sono-text-muted);
  font-family: var(--sono-font-mono);
  font-size: 8px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  border-radius: var(--sono-radius);
  transition: all 0.4s var(--sono-transition);
  position: relative;
  cursor: pointer;
}

.sono-nav__link::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  width: 2px;
  height: 0;
  background: var(--sono-accent);
  transform: translateY(-50%);
  transition: height 0.4s var(--sono-transition);
  box-shadow: 0 0 8px var(--sono-accent-glow);
}

.sono-nav__link:hover,
.sono-nav__link.active {
  color: var(--sono-highlight);
}

.sono-nav__link.active::before {
  height: 24px;
}

.sono-nav__link svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 0.3s ease;
}

.sono-nav__footer {
  font-family: var(--sono-font-mono);
  font-size: 7px;
  color: var(--sono-text-muted);
  letter-spacing: 2px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
}

.sono-nav__hamburger { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.sono-hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-left: var(--sono-nav-width);
  padding-top: clamp(60px, 6vw, 120px);
  padding-bottom: 20vh;
}

.sono-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.sono-hero__bg canvas {
  width: 100%;
  height: 100%;
  display: block;
  position: relative;
  z-index: 2;
}

.sono-hero__wave-gradient {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(
      135deg,
      #031d1d 0%, #04413c 15%, #065e55 30%,
      #01B3A4 50%, #00d4c8 65%, #00FEFE 80%,
      #5efafa 90%, #00FEFE 100%
    );
  background-size: 400% 400%;
  animation: sonoWaveGradient 12s ease infinite;
  opacity: 0.15;
}

.sono-hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0.45;
  filter: saturate(1.3) contrast(1.4) brightness(1.3);
  animation: sonoSlowPan 30s ease-in-out infinite alternate;
}

@keyframes sonoWaveGradient {
  0%   { background-position: 0% 50%; }
  25%  { background-position: 50% 100%; }
  50%  { background-position: 100% 50%; }
  75%  { background-position: 50% 0%; }
  100% { background-position: 0% 50%; }
}

@keyframes sonoSlowPan {
  0%   { transform: scale(1.15) translateX(-3%); }
  100% { transform: scale(1.15) translateX(3%); }
}

.sono-hero__overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(1, 179, 164, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 30%, rgba(0, 254, 254, 0.04) 0%, transparent 50%),
    linear-gradient(180deg, rgba(5,5,5,0.4) 0%, rgba(5,5,5,0.15) 40%, rgba(5,5,5,0.75) 100%);
  z-index: 3;
}

.sono-hero__content {
  position: relative;
  z-index: 4;
  text-align: center;
  padding: 0 40px;
  max-width: none;
}

.sono-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--sono-border-accent);
  border-radius: 100px;
  font-family: var(--sono-font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sono-accent);
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: sonoFadeUp 0.8s 0.3s var(--sono-transition) forwards;
  background: rgba(1, 179, 164, 0.05);
}

.sono-hero__badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--sono-accent);
  border-radius: 50%;
  animation: sonoPulse 2s ease infinite;
}

.sono-hero__title {
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 5.5rem);
  white-space: nowrap;
  line-height: 0.95;
  letter-spacing: -2px;
  margin-bottom: 28px;
  opacity: 0;
  transform: translateY(30px);
  animation: sonoFadeUp 1s 0.5s var(--sono-transition) forwards;
	
}

.sono-hero__title span {
  display: block;
  background: linear-gradient(
    90deg,
    #0a1a18 0%, #0a1a18 10%,
    #5CF0E8 20%, #0a1a18 40%,
    #0a1a18 50%, #0a1a18 60%,
    #5CF0E8 70%, #0a1a18 90%,
    #0a1a18 100%
  );
  background-size: 800% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: sonoGradientShift 8s linear infinite;
  filter: drop-shadow(0 0 3px rgba(0, 254, 254, 0.4)) drop-shadow(0 0 3px rgba(0, 254, 254, 0.1));
}

.sono-hero__sub {
  font-family: var(--sono-font-body);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
  color: var(--sono-text-dim);
  max-width: 560px;
  margin: 0 auto 48px;
  opacity: 0;
  transform: translateY(20px);
  animation: sonoFadeUp 0.8s 0.7s var(--sono-transition) forwards;
}

.sono-hero__actions {
  display: flex;
  gap: 32px;
}

.sono-hero__actions .sono-btn {
  min-width: 240px;
  justify-content: center;
}

.sono-hero__actions {
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(20px);
  animation: sonoFadeUp 0.8s 0.9s var(--sono-transition) forwards;
}

.sono-hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--sono-text-muted);
  font-family: var(--sono-font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: sonoFloat 3s ease-in-out infinite;
}

.sono-hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--sono-accent), transparent);
}

/* ============================================================
   SHARED — buttons, sections, reveals
   ============================================================ */
.sono-btn {
  font-family: var(--sono-font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 16px 40px;
  border-radius: var(--sono-radius);
  cursor: pointer;
  transition: all 0.4s var(--sono-transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
  line-height: 1.2;
}

.sono-btn--primary {
  background: var(--sono-accent);
  color: var(--sono-bg);
  border: none;
  box-shadow: 0 0 30px var(--sono-accent-glow);
}

.sono-btn--primary:hover {
  background: var(--sono-highlight);
  box-shadow: 0 0 50px var(--sono-highlight-glow), 0 4px 20px rgba(0,0,0,0.3);
  transform: translateY(-2px);
}

.sono-btn--ghost {
  background: transparent;
  color: var(--sono-text);
  border: 1px solid var(--sono-border);
}

.sono-btn--ghost:hover {
  border-color: var(--sono-accent);
  color: var(--sono-accent);
  box-shadow: 0 0 20px var(--sono-accent-glow);
}

.sono-main {
  margin-left: var(--sono-nav-width);
  position: relative;
  overflow-x: hidden;
}

.sono-section {
  padding: 80px 60px;
  position: relative;
}

.sono-section__header {
  margin-bottom: 48px;
  max-width: 700px;
}

.sono-section__label {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--sono-accent);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sono-section__label::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--sono-accent);
}

.sono-section__title {
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.sono-section__desc {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--sono-text-dim);
  line-height: 1.7;
}

/* ============================================================
   PRODUCT CARDS
   ============================================================ */
.sono-products { background: var(--sono-bg); }

.sono-products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.sono-product-card {
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
  padding: 36px 28px 32px;
  position: relative;
  overflow: hidden;
  transition: all 0.5s var(--sono-transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.sono-product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--sono-accent), transparent);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.sono-product-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, var(--sono-accent-glow) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.sono-product-card:hover {
  border-color: var(--sono-border-accent);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.sono-product-card:hover::before,
.sono-product-card:hover::after { opacity: 1; }

.sono-product-card__series {
  font-family: var(--sono-font-mono);
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sono-accent);
  margin-bottom: 20px;
}

.sono-product-card__visual {
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--sono-bg-elevated);
  border-radius: var(--sono-radius);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.sono-product-card__visual-inner {
  width: 60%;
  height: 60%;
  border-radius: var(--sono-radius);
  background: radial-gradient(circle, var(--sono-bg-card) 30%, rgba(1,179,164,0.08) 70%);
  border: 1px solid var(--sono-border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.6s var(--sono-transition);
}

.sono-product-card:hover .sono-product-card__visual-inner {
  transform: scale(1.08);
  border-color: var(--sono-accent);
  box-shadow: 0 0 40px var(--sono-accent-glow);
}

.sono-product-card__visual-inner svg {
  width: 40px;
  height: 40px;
  stroke: var(--sono-accent);
  fill: none;
  stroke-width: 1;
}

.sono-product-card__name {
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: 1.4rem;
  margin-bottom: 6px;
}

.sono-product-card__spec {
  font-family: var(--sono-font-mono);
  font-size: 11px;
  color: var(--sono-text-dim);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.sono-product-card__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--sono-border);
  margin-top: auto;
}

.sono-product-card__stat-val {
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--sono-highlight);
}

.sono-product-card__stat-label {
  font-family: var(--sono-font-mono);
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--sono-text-muted);
}

.sono-product-card__cta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  font-family: var(--sono-font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--sono-accent);
  text-decoration: none;
  transition: gap 0.3s ease, color 0.3s ease;
}

.sono-product-card__cta:hover {
  gap: 14px;
  color: var(--sono-highlight);
}

.sono-product-card__cta svg {
  width: 16px; height: 16px;
  stroke: currentColor; fill: none; stroke-width: 2;
}

/* ============================================================
   3D EXPLORER
   ============================================================ */
.sono-explorer {
  background: var(--sono-bg-elevated);
  border-top: 1px solid var(--sono-border);
  border-bottom: 1px solid var(--sono-border);
}

.sono-explorer__container {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  min-height: 560px;
}

.sono-explorer__viewport {
  position: relative;
  background: var(--sono-bg);
  border-radius: var(--sono-radius-lg);
  border: 1px solid var(--sono-border);
  overflow: hidden;
  min-height: 500px;
  cursor: grab;
}

.sono-explorer__viewport:active { cursor: grabbing; }

.sono-explorer__viewport canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.sono-explorer__controls-hint {
  position: absolute;
  bottom: 16px;
  left: 16px;
  display: flex;
  gap: 12px;
  z-index: 5;
  flex-wrap: wrap;
}

.sono-explorer__hint {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--sono-font-mono);
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--sono-text-muted);
  padding: 6px 12px;
  background: rgba(5,5,5,0.8);
  border-radius: 100px;
  border: 1px solid var(--sono-border);
}

.sono-explorer__panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sono-explorer__panel-section {
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
  padding: 24px;
}

.sono-explorer__panel-label {
  font-family: var(--sono-font-mono);
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sono-accent);
  margin-bottom: 16px;
}

.sono-explorer__lighting-btns {
  display: flex;
  gap: 8px;
}

.sono-lighting-btn {
  flex: 1;
  padding: 10px;
  background: var(--sono-bg-elevated);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius);
  color: var(--sono-text-dim);
  font-family: var(--sono-font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.sono-lighting-btn:hover,
.sono-lighting-btn.active {
  border-color: var(--sono-accent);
  color: var(--sono-accent);
  background: rgba(1,179,164,0.05);
}

.sono-explorer__specs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sono-explorer__spec-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--sono-border);
}

.sono-explorer__spec-row:last-child { border-bottom: none; }

.sono-explorer__spec-key {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  color: var(--sono-text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.sono-explorer__spec-val {
  font-family: var(--sono-font-display);
  font-weight: 600;
  font-size: 14px;
  color: var(--sono-text);
}

/* ============================================================
   CONFIGURATOR
   ============================================================ */
.sono-configurator { background: var(--sono-bg); }

.sono-config__layout {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 60px;
  align-items: start;
}

.sono-config__preview {
  position: sticky;
  top: 120px;
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
  padding: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.sono-config__preview-visual {
  width: 100%;
  max-width: 360px;
  height: 360px;
  border-radius: var(--sono-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.6s var(--sono-transition);
  position: relative;
}

.sono-config__preview-ring {
  position: absolute;
  inset: -18px;
  border-radius: var(--sono-radius-lg);
}

.sono-config__preview-label {
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: 1.6rem;
}

.sono-config__preview-price {
  font-family: var(--sono-font-mono);
  font-size: 1.4rem;
  color: var(--sono-highlight);
}

.sono-config__form {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.sono-config__group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sono-config__group-label {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sono-accent);
}

.sono-config__options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sono-config__option {
  padding: 14px 24px;
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius);
  color: var(--sono-text-dim);
  font-family: var(--sono-font-display);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.sono-config__option:hover {
  border-color: rgba(1,179,164,0.5);
  color: var(--sono-text);
}

.sono-config__option.active {
  border-color: var(--sono-accent);
  color: var(--sono-text);
  background: rgba(1,179,164,0.08);
  box-shadow: 0 0 20px var(--sono-accent-glow);
}

.sono-config__finishes { display: flex; gap: 14px; }

.sono-config__finish {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.sono-config__finish::after {
  content: attr(data-label);
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--sono-font-mono);
  font-size: 8px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--sono-text-muted);
  white-space: nowrap;
}

.sono-config__finish:hover,
.sono-config__finish.active {
  border-color: var(--sono-accent);
  box-shadow: 0 0 16px var(--sono-accent-glow);
}

.sono-config__summary {
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
  padding: 28px;
}

.sono-config__summary-title {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sono-accent);
  margin-bottom: 16px;
}

.sono-config__summary-rows {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.sono-config__summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
}

.sono-config__summary-key { color: var(--sono-text-dim); }
.sono-config__summary-val { font-weight: 600; }

/* ============================================================
   COMPARISON SECTION
   ============================================================ */
.sono-comparison {
  background: var(--sono-bg);
  border-top: 1px solid var(--sono-border);
  border-bottom: 1px solid var(--sono-border);
}

.sono-comparison__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 60px;
}

.sono-comparison__table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-family: var(--sono-font-body);
  font-size: 14px;
  min-width: 720px;
}

.sono-comparison__table thead tr { background: var(--sono-bg-elevated); }

.sono-comparison__table th {
  padding: 20px 16px;
  text-align: center;
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--sono-text);
  border-bottom: 2px solid var(--sono-border);
  vertical-align: bottom;
}

.sono-comparison__th-spec {
  text-align: left !important;
  width: 200px;
  color: var(--sono-text-dim) !important;
  font-family: var(--sono-font-mono) !important;
  font-size: 10px !important;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.sono-comparison__th-sono {
  background: rgba(1, 179, 164, 0.08) !important;
  border-bottom-color: var(--sono-accent) !important;
  color: var(--sono-highlight) !important;
}

.sono-comparison__model-slider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 4px;
}

.sono-comparison__model-slider #compModelName {
  min-width: 100px;
  text-align: center;
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: 14px;
  transition: opacity 0.2s;
}

.sono-comparison__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--sono-border-accent);
  background: rgba(1, 179, 164, 0.08);
  color: var(--sono-accent);
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.sono-comparison__arrow:hover {
  background: rgba(1, 179, 164, 0.2);
  border-color: var(--sono-accent);
  color: var(--sono-highlight);
}

.sono-comparison__arrow:active {
  transform: scale(0.9);
}

.sono-comparison__th-comp {
  color: var(--sono-text-dim) !important;
  font-weight: 500 !important;
}

.sono-comparison__th-comp span {
  display: block;
  font-family: var(--sono-font-mono);
  font-size: 9px;
  color: var(--sono-text-muted);
  letter-spacing: 1px;
  margin-top: 4px;
  font-weight: 400;
}

.sono-comparison__table tbody tr { transition: background 0.2s ease; }
.sono-comparison__table tbody tr:hover { background: var(--sono-bg-elevated); }

.sono-comparison__table td {
  padding: 16px;
  border-bottom: 1px solid var(--sono-border);
  text-align: center;
}

.sono-comparison__spec-name {
  text-align: left !important;
  font-family: var(--sono-font-mono);
  font-size: 12px;
  color: var(--sono-text-dim);
  letter-spacing: 0.5px;
}

.sono-comparison__val {
  font-family: var(--sono-font-display);
  font-weight: 500;
  font-size: 14px;
  color: var(--sono-text-dim);
}

.sono-comparison__val--best {
  color: var(--sono-highlight) !important;
  font-weight: 700 !important;
  background: rgba(1, 179, 164, 0.06);
}

.sono-comparison__advantages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.sono-comparison__adv-card {
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
  padding: 36px 28px;
  transition: all 0.4s var(--sono-transition);
}

.sono-comparison__adv-card:hover {
  border-color: var(--sono-border-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.sono-comparison__adv-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(1, 179, 164, 0.08);
  border: 1px solid var(--sono-border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.sono-comparison__adv-icon svg {
  width: 22px; height: 22px;
  stroke: var(--sono-accent); fill: none;
}

.sono-comparison__adv-title {
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.sono-comparison__adv-desc {
  font-size: 14px;
  color: var(--sono-text-dim);
  line-height: 1.7;
}

/* ============================================================
   PERFORMANCE
   ============================================================ */
.sono-performance {
  background: var(--sono-bg-elevated);
  border-top: 1px solid var(--sono-border);
  border-bottom: 1px solid var(--sono-border);
}

.sono-perf__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.sono-perf__card {
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.sono-perf__card-label {
  font-family: var(--sono-font-mono);
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sono-accent);
  margin-bottom: 12px;
}

.sono-perf__card-title {
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.sono-perf__chart-placeholder {
  width: 100%;
  height: 200px;
  background: var(--sono-bg-elevated);
  border-radius: var(--sono-radius);
  border: 1px solid var(--sono-border);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  padding: 20px;
}

.sono-perf__chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  flex: 1;
  padding-top: 10px;
}

.sono-perf__chart-bar {
  flex: 1;
  background: linear-gradient(to top, var(--sono-accent), var(--sono-highlight));
  border-radius: 3px 3px 0 0;
  min-height: 8px;
  opacity: 0.7;
  transition: opacity 0.3s ease, height 0.6s var(--sono-transition);
}

.sono-perf__chart-bar:hover { opacity: 1; }

.sono-perf__wave-placeholder {
  width: 100%;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sono-perf__wave-placeholder svg { width: 100%; height: 100%; }

.sono-perf__metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.sono-perf__metric {
  text-align: center;
  padding: 28px 16px;
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
}

.sono-perf__metric-value {
  font-family: var(--sono-font-display);
  font-weight: 800;
  font-size: 2.4rem;
  color: var(--sono-highlight);
  line-height: 1;
  margin-bottom: 8px;
}

.sono-perf__metric-unit {
  font-size: 1rem;
  font-weight: 400;
  color: var(--sono-accent);
}

.sono-perf__metric-label {
  font-family: var(--sono-font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--sono-text-muted);
}

/* Chart footnotes */
.sono-perf__card-footnote {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  color: var(--sono-text-muted);
  margin-top: 12px;
  letter-spacing: 0.5px;
}

/* Analysis model selector */
.sono-perf__model-selector {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  justify-content: center;
}

.sono-perf__model-btn {
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  color: var(--sono-text-dim);
  padding: 10px 20px;
  border-radius: var(--sono-radius);
  font-family: var(--sono-font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.3s var(--sono-transition);
}

.sono-perf__model-btn:hover {
  border-color: var(--sono-border-accent);
  color: var(--sono-text);
}

.sono-perf__model-btn.active {
  border-color: var(--sono-accent);
  background: rgba(1, 179, 164, 0.1);
  color: var(--sono-highlight);
  box-shadow: 0 0 12px var(--sono-accent-glow);
}

/* Equal loudness contour */
.sono-perf__spectrum {
  margin-top: 48px;
  padding: 32px;
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
}

.sono-perf__spectrum-header {
  margin-bottom: 16px;
}

.sono-perf__spectrum-desc {
  font-family: var(--sono-font-body);
  font-size: 14px;
  color: var(--sono-text-dim);
  line-height: 1.6;
  margin-bottom: 24px;
}

.sono-perf__spectrum-desc strong {
  color: var(--sono-highlight);
}

.sono-perf__loudness-chart {
  display: grid;
  grid-template-columns: 48px 1fr;
  grid-template-rows: 1fr auto;
  gap: 0;
}

.sono-perf__loudness-axis-y {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-family: var(--sono-font-mono);
  font-size: 9px;
  color: var(--sono-text-muted);
  padding: 4px 8px 4px 0;
  text-align: right;
}

.sono-perf__loudness-area {
  position: relative;
  height: 200px;
  background: rgba(255,255,255,0.02);
  border-left: 1px solid var(--sono-border);
  border-bottom: 1px solid var(--sono-border);
  border-radius: 0 var(--sono-radius) 0 0;
  overflow: hidden;
}

.sono-perf__loudness-curve {
  position: absolute;
  left: 0;
  right: 0;
  border-top: 2px solid;
  pointer-events: none;
}

/* Stylized equal-loudness curve shapes via clip-path */
.sono-perf__loudness-curve--80phon {
  top: 15%;
  border-color: rgba(255, 100, 68, 0.4);
  height: 30%;
  background: rgba(255, 100, 68, 0.03);
  clip-path: polygon(0% 80%, 5% 0%, 15% 50%, 30% 70%, 50% 75%, 70% 78%, 100% 80%, 100% 100%, 0% 100%);
}

.sono-perf__loudness-curve--60phon {
  top: 35%;
  border-color: rgba(0, 254, 254, 0.3);
  height: 30%;
  background: rgba(0, 254, 254, 0.03);
  clip-path: polygon(0% 70%, 5% 0%, 15% 40%, 30% 60%, 50% 68%, 70% 72%, 100% 75%, 100% 100%, 0% 100%);
}

.sono-perf__loudness-curve--40phon {
  top: 55%;
  border-color: rgba(1, 179, 164, 0.3);
  height: 30%;
  background: rgba(1, 179, 164, 0.03);
  clip-path: polygon(0% 60%, 5% 0%, 15% 30%, 30% 50%, 50% 60%, 70% 65%, 100% 68%, 100% 100%, 0% 100%);
}

.sono-perf__loudness-model {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 40%;
  width: 35%;
  background: linear-gradient(90deg, rgba(1, 179, 164, 0.2), rgba(0, 254, 254, 0.08));
  border-top: 2px solid var(--sono-highlight);
  border-right: 1px dashed var(--sono-accent);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 8px;
  transition: width 0.6s var(--sono-transition);
}

.sono-perf__loudness-model span {
  font-family: var(--sono-font-display);
  font-weight: 600;
  font-size: 11px;
  color: var(--sono-highlight);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.sono-perf__loudness-axis-x {
  grid-column: 2;
  display: flex;
  justify-content: space-between;
  font-family: var(--sono-font-mono);
  font-size: 9px;
  color: var(--sono-text-muted);
  padding-top: 8px;
}

.sono-perf__spectrum-footnote {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  color: var(--sono-text-muted);
  margin-top: 16px;
  letter-spacing: 0.5px;
}

/* Room suitability cards */
.sono-perf__rooms {
  margin-top: 48px;
}

.sono-perf__rooms-header {
  margin-bottom: 24px;
}

.sono-perf__rooms-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.sono-perf__room-card {
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
  padding: 24px 16px;
  text-align: center;
  transition: all 0.3s var(--sono-transition);
  cursor: pointer;
}

.sono-perf__room-card:hover {
  border-color: var(--sono-border-accent);
  background: var(--sono-bg-card-hover);
}

.sono-perf__room-card--active {
  border-color: var(--sono-accent);
  background: rgba(1, 179, 164, 0.06);
  box-shadow: 0 0 20px var(--sono-accent-glow);
}

.sono-perf__room-icon {
  width: 36px;
  height: 36px;
  margin: 0 auto 12px;
  color: var(--sono-accent);
}

.sono-perf__room-icon svg {
  width: 100%;
  height: 100%;
}

.sono-perf__room-model {
  font-family: var(--sono-font-display);
  font-weight: 600;
  font-size: 14px;
  color: var(--sono-highlight);
  margin-bottom: 4px;
}

.sono-perf__room-name {
  font-family: var(--sono-font-body);
  font-size: 13px;
  color: var(--sono-text);
  margin-bottom: 4px;
}

.sono-perf__room-vol {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  color: var(--sono-text-muted);
  letter-spacing: 0.5px;
}

/* Headroom analysis */
.sono-perf__reference {
  margin-top: 48px;
  padding: 32px;
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius-lg);
}

.sono-perf__ref-intro {
  font-family: var(--sono-font-body);
  font-size: 14px;
  color: var(--sono-text-dim);
  line-height: 1.6;
  margin: 16px 0 24px;
}

.sono-perf__headroom-bars {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sono-perf__headroom-row {
  display: grid;
  grid-template-columns: 110px 1fr 60px;
  align-items: center;
  gap: 16px;
  padding: 8px 0;
  border-radius: var(--sono-radius);
  transition: all 0.3s var(--sono-transition);
  cursor: pointer;
}

.sono-perf__headroom-row:hover {
  background: rgba(255,255,255,0.02);
}

.sono-perf__headroom-row--active {
  background: rgba(1, 179, 164, 0.06);
}

.sono-perf__headroom-label {
  font-family: var(--sono-font-display);
  font-weight: 600;
  font-size: 13px;
  color: var(--sono-text-dim);
  text-align: right;
  transition: color 0.3s;
}

.sono-perf__headroom-row--active .sono-perf__headroom-label {
  color: var(--sono-highlight);
}

.sono-perf__headroom-track {
  height: 28px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--sono-radius);
  overflow: hidden;
}

.sono-perf__headroom-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--sono-accent), var(--sono-highlight));
  border-radius: var(--sono-radius);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 12px;
  transition: width 0.6s var(--sono-transition);
}

.sono-perf__headroom-fill span {
  font-family: var(--sono-font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--sono-bg);
  white-space: nowrap;
}

.sono-perf__headroom-spl {
  font-family: var(--sono-font-mono);
  font-size: 12px;
  color: var(--sono-text-muted);
  text-align: left;
}

.sono-perf__headroom-row--active .sono-perf__headroom-spl {
  color: var(--sono-accent);
}

.sono-perf__headroom-baseline {
  margin-top: 12px;
  padding-top: 8px;
  border-top: 1px dashed var(--sono-border);
  text-align: center;
}

.sono-perf__headroom-baseline-mark {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  color: var(--sono-text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ============================================================
   VIDEO
   ============================================================ */
.sono-video { background: var(--sono-bg); }

.sono-video__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.sono-video__item {
  position: relative;
  border-radius: var(--sono-radius-lg);
  overflow: hidden;
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  aspect-ratio: 16/9;
}

.sono-video__item--featured {
  grid-column: 1 / -1;
  aspect-ratio: 21/9;
}

.sono-video__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: radial-gradient(circle at center, rgba(1,179,164,0.05) 0%, transparent 70%);
  cursor: pointer;
  transition: all 0.4s ease;
}

.sono-video__placeholder:hover .sono-video__play {
  transform: scale(1.1);
  box-shadow: 0 0 40px var(--sono-accent-glow);
}

.sono-video__play {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px solid var(--sono-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s ease;
}

.sono-video__play svg {
  width: 24px;
  height: 24px;
  fill: var(--sono-accent);
  margin-left: 3px;
}

.sono-video__label {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--sono-text-muted);
}

/* ============================================================
   CONTACT
   ============================================================ */
.sono-contact {
  background: var(--sono-bg-elevated);
  border-top: 1px solid var(--sono-border);
}

.sono-contact__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.sono-contact__info {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.sono-contact__tagline {
  font-family: var(--sono-font-display);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.2;
}

.sono-contact__tagline span { color: var(--sono-accent); }

.sono-contact__details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sono-contact__detail {
  display: flex;
  align-items: center;
  gap: 16px;
}

.sono-contact__detail-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(1,179,164,0.08);
  border: 1px solid var(--sono-border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sono-contact__detail-icon svg {
  width: 18px; height: 18px;
  stroke: var(--sono-accent); fill: none; stroke-width: 1.5;
}

.sono-contact__detail-text {
  font-size: 14px;
  color: var(--sono-text-dim);
}

.sono-contact__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sono-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.sono-form__group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sono-form__label {
  font-family: var(--sono-font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--sono-text-muted);
}

.sono-form__input,
.sono-form__select,
.sono-form__textarea {
  background: var(--sono-bg-card);
  border: 1px solid var(--sono-border);
  border-radius: var(--sono-radius);
  padding: 14px 18px;
  font-family: var(--sono-font-body);
  font-size: 14px;
  color: var(--sono-text);
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  width: 100%;
}

.sono-form__input:focus,
.sono-form__select:focus,
.sono-form__textarea:focus {
  border-color: var(--sono-accent);
  box-shadow: 0 0 0 3px var(--sono-accent-glow);
}

.sono-form__input::placeholder,
.sono-form__textarea::placeholder { color: var(--sono-text-muted); }

.sono-form__select {
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2301B3A4' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.sono-form__textarea { min-height: 120px; resize: vertical; }

/* ============================================================
   FOOTER
   ============================================================ */
.sono-footer {
  margin-left: var(--sono-nav-width);
  padding: 40px 60px;
  border-top: 1px solid var(--sono-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sono-footer__copy {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--sono-text-muted);
}

.sono-footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.sono-footer__link {
  font-family: var(--sono-font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--sono-text-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.sono-footer__link:hover { color: var(--sono-accent); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes sonoFadeUp {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes sonoPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.5); }
}

@keyframes sonoGradientShift {
  from { background-position: 0% 0%; }
  to   { background-position: -57% 0%; }
}

@keyframes sonoFloat {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes sonoRotateSlow {
  to { transform: rotate(360deg); }
}

.sono-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--sono-transition), transform 0.8s var(--sono-transition);
  animation: sonoRevealFallback 0.8s 1.5s var(--sono-transition) forwards;
}

.sono-reveal.visible {
  opacity: 1;
  transform: translateY(0);
  animation: none;
}

@keyframes sonoRevealFallback {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .sono-explorer__container { grid-template-columns: 1fr; }
  .sono-config__layout { grid-template-columns: 1fr; }
  .sono-config__preview { position: static; }
  .sono-contact__layout { grid-template-columns: 1fr; gap: 48px; }
  .sono-perf__metrics { grid-template-columns: repeat(2, 1fr); }
  .sono-perf__rooms-grid { grid-template-columns: repeat(3, 1fr); }
  .sono-comparison__advantages { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
	  /* Native scrolling on mobile — no custom scroll container.
	     Restores pull-to-refresh and fixes top-of-page rendering. */
	  html, body {
    height: auto;
    overflow: visible;
    overflow-x: hidden;
  }
  .sono-page {
    height: auto;
    overflow: visible;
  }
  /* Hamburger button */
  .sono-nav__hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 1100;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: rgba(5, 5, 5, 0.85);
    border: 1px solid var(--sono-border-accent);
    border-radius: var(--sono-radius);
    cursor: pointer;
    backdrop-filter: blur(8px);
  }
  .sono-nav__hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--sono-accent);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
  .sono-nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .sono-nav__hamburger.open span:nth-child(2) { opacity: 0; }
  .sono-nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* Nav overlay — hidden by default, shown when .mobile-open */
  .sono-nav {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(3, 3, 3, 0.97);
    border-right: none;
    z-index: 1050;
    padding: 0;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transform: none !important;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }
  .sono-nav.mobile-open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
  }
  .sono-nav__logo,
  .sono-nav__footer { display: none; }
  .sono-nav__links {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding-top: 0;
    width: 100%;
  }
  .sono-nav__link {
    flex-direction: row;
    gap: 12px;
    font-size: 13px;
    padding: 14px 32px;
    width: 80%;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--sono-radius);
  }
  .sono-nav__link:hover,
  .sono-nav__link.active {
    border-color: var(--sono-border-accent);
    background: rgba(1, 179, 164, 0.08);
  }
  .sono-nav__link svg { width: 20px; height: 20px; }
  .sono-nav__link::before { display: none; }
  :root { --sono-nav-width: 0px; }
  .sono-hero, .sono-main, .sono-footer { margin-left: 0; }
  .sono-footer { padding: 32px 24px; flex-direction: column; gap: 16px; }
  .sono-section { padding: 80px 24px; }
  .sono-hero__content { padding: 0 20px; }
  .sono-config__preview { padding: 24px; }
  .sono-config__preview-visual { width: 100%; max-width: 360px; height: auto; aspect-ratio: 1; }
  .sono-config__option { padding: 10px 16px; font-size: 12px; }
  .sono-hero { padding-top: 240px; min-height: 0; height: auto; }
  .sono-hero__top-logo {
    top: 0;
    background: #000;
    background-size: auto;
    background-image: none;
    animation: none;
    box-shadow: none;
    padding: 16px 0 12px;
  }
  .sono-hero__top-logo-img { width: clamp(200px, 55vw, 240px); }
  .sono-hero__title { white-space: normal; letter-spacing: -1px; }
  .sono-video__grid { grid-template-columns: 1fr; }
  .sono-form__row { grid-template-columns: 1fr; }
  .sono-perf__metrics { grid-template-columns: 1fr 1fr; }
  .sono-perf__rooms-grid { grid-template-columns: repeat(2, 1fr); }
  .sono-perf__headroom-row { grid-template-columns: 80px 1fr 50px; gap: 10px; }
  .sono-perf__headroom-label { font-size: 11px; }
  .sono-perf__loudness-area { height: 150px; }
  .sono-perf__model-selector { gap: 6px; }
  .sono-perf__model-btn { padding: 8px 14px; font-size: 11px; }
  .sono-section { padding: 60px 24px; }
  .sono-page { padding-bottom: 48px; }
}

/* ============================================================
   WHY SONOFINITY — customer-centric section
   ============================================================ */
.sono-why__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.sono-why__card {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--sono-border-accent, rgba(1,179,164,0.25));
  border-radius: 12px;
  padding: 32px 28px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.sono-why__card:hover {
  border-color: var(--sono-accent, #01b3a4);
  transform: translateY(-4px);
}
.sono-why__icon {
  width: 56px;
  height: 56px;
  color: var(--sono-accent, #01b3a4);
  margin-bottom: 20px;
}
.sono-why__icon svg { width: 100%; height: 100%; }
.sono-why__title {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 12px;
  color: #fff;
  letter-spacing: 0.02em;
}
.sono-why__desc {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255,255,255,0.7);
  margin: 0;
}
.sono-why__desc em { color: var(--sono-accent, #01b3a4); font-style: normal; }
.sono-why__cta {
  display: flex;
  justify-content: center;
  margin-top: 48px;
}

/* ============================================================
   BUTTON — secondary variant (outlined accent)
   ============================================================ */
.sono-btn--secondary {
  background: transparent;
  color: var(--sono-accent);
  border: 1px solid var(--sono-accent);
  box-shadow: inset 0 0 0 1px rgba(1,179,164,0.1);
}
.sono-btn--secondary:hover {
  background: var(--sono-accent);
  color: var(--sono-bg);
  box-shadow: 0 0 24px var(--sono-accent-glow);
  transform: translateY(-2px);
}

/* ============================================================
   PRODUCT CARD — remove tap effect, dual action buttons
   ============================================================ */
.sono-product-card { cursor: default; }
.sono-product-card:hover { transform: none; }

.sono-product-card__actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}
.sono-product-card__actions .sono-btn {
  flex: 1;
  justify-content: center;
  font-size: 11px;
  padding: 11px 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .sono-why__grid { grid-template-columns: 1fr; gap: 16px; }
  .sono-why__card { padding: 24px 20px; }
  .sono-product-card__actions { flex-direction: column; gap: 8px; }
  .sono-product-card__actions .sono-btn { font-size: 12px; padding: 12px 14px; }
}

/* ============================================================
   MOBILE scroll container
   Note: do NOT set overscroll-behavior on html/body/.sono-page —
   it disables pull-to-refresh in Firefox and interferes with
   reaching the true top of the scroll container.
   ============================================================ */
@media (max-width: 768px) {
  html { scroll-behavior: auto; }
  .sono-page { scroll-padding-top: 0; }
  .sono-hero { min-height: 0; }
}