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/* Acoustic experience and progressive motion */
body{isolation:isolate}
.scroll-progress{position:fixed;inset:0 0 auto;height:3px;z-index:100;background:linear-gradient(90deg,var(--accent2),var(--accent),var(--green));transform:scaleX(var(--scroll-progress,0));transform-origin:left;box-shadow:0 0 18px rgba(125,211,252,.65);pointer-events:none}
.ambient-field{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}.ambient-orb{position:absolute;width:28rem;aspect-ratio:1;border-radius:50%;filter:blur(72px);opacity:.12;animation:orb-drift 15s ease-in-out infinite alternate}.orb-one{top:8%;left:-9rem;background:var(--accent)}.orb-two{right:-11rem;top:48%;background:var(--accent2);animation-delay:-6s}@keyframes orb-drift{to{transform:translate3d(3rem,4rem,0) scale(1.12)}}
.motion-hero{position:relative;overflow:hidden;isolation:isolate;transform:translate3d(0,var(--hero-shift,0),0)}.motion-hero:after{content:"";position:absolute;width:34rem;aspect-ratio:1;right:-15rem;top:-20rem;border-radius:50%;background:radial-gradient(circle,rgba(125,211,252,.2),transparent 67%);z-index:-1}
.hero-soundscape{height:3rem;display:flex;align-items:center;gap:.35rem;position:absolute;right:1.35rem;bottom:1.15rem;opacity:.42}.hero-soundscape span,.sound-signature span{display:block;width:.28rem;border-radius:99px;background:linear-gradient(180deg,var(--accent),var(--accent2));animation:sound-pulse 1.8s ease-in-out infinite}.hero-soundscape span:nth-child(1),.hero-soundscape span:nth-child(9){height:22%;animation-delay:-.2s}.hero-soundscape span:nth-child(2),.hero-soundscape span:nth-child(8){height:46%;animation-delay:-.55s}.hero-soundscape span:nth-child(3),.hero-soundscape span:nth-child(7){height:70%;animation-delay:-.9s}.hero-soundscape span:nth-child(4),.hero-soundscape span:nth-child(6){height:92%;animation-delay:-1.2s}.hero-soundscape span:nth-child(5){height:58%;animation-delay:-1.5s}@keyframes sound-pulse{0%,100%{transform:scaleY(.58);opacity:.48}50%{transform:scaleY(1);opacity:1}}
.panel.active{animation:panel-arrive .48s cubic-bezier(.2,.8,.2,1)}@keyframes panel-arrive{from{opacity:.25;transform:translateY(14px)}to{opacity:1;transform:none}}
.motion-ready [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .68s ease var(--reveal-delay,0ms),transform .68s cubic-bezier(.2,.8,.2,1) var(--reveal-delay,0ms)}.motion-ready [data-reveal].is-visible{opacity:1;transform:none}
.motion-card{position:relative;isolation:isolate;transform-style:preserve-3d;transition:transform .18s ease,border-color .25s ease,box-shadow .25s ease}.motion-card:before{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(420px circle at var(--spot-x,50%) var(--spot-y,50%),rgba(125,211,252,.12),transparent 45%);opacity:0;transition:opacity .25s;z-index:-1;pointer-events:none}.motion-card:hover:before{opacity:1}.motion-card:hover{border-color:rgba(125,211,252,.48);box-shadow:0 18px 42px rgba(0,0,0,.25)}.motion-ready [data-reveal].is-visible.motion-card{transform:perspective(850px) rotateX(var(--tilt-x,0deg)) rotateY(var(--tilt-y,0deg))}
.acoustic-panel{overflow:hidden}.acoustic-heading{display:grid;grid-template-columns:minmax(0,1fr) 9rem;align-items:center;gap:2rem}.sound-signature{height:6rem;display:flex;align-items:center;justify-content:center;gap:.5rem;border:1px solid var(--line);border-radius:1rem;background:rgba(8,11,16,.35)}.sound-signature span{width:.42rem}.sound-signature span:nth-child(1),.sound-signature span:nth-child(7){height:24%;animation-delay:-.2s}.sound-signature span:nth-child(2),.sound-signature span:nth-child(6){height:48%;animation-delay:-.6s}.sound-signature span:nth-child(3),.sound-signature span:nth-child(5){height:78%;animation-delay:-1s}.sound-signature span:nth-child(4){height:98%;animation-delay:-1.4s}
.acoustic-principles{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;margin:1.1rem 0}.acoustic-principle,.acoustic-performance-grid article,.acoustic-system-card{position:relative;border:1px solid var(--line);border-radius:.9rem;padding:1rem;background:linear-gradient(145deg,rgba(31,42,66,.8),rgba(17,24,39,.76));overflow:hidden}.acoustic-principle p,.acoustic-performance-grid p,.acoustic-system-card p{margin:.35rem 0 0;color:var(--soft)}.principle-number{display:inline-block;color:var(--accent);font-size:.68rem;font-weight:950;letter-spacing:.16em;margin-bottom:.65rem}
.acoustic-builder{margin:1rem 0;padding:1rem;border:1px solid var(--line2);border-radius:1rem;background:linear-gradient(135deg,rgba(14,23,39,.95),rgba(26,31,58,.92))}.section-head.compact{margin-bottom:.85rem}.section-head.compact p{margin-bottom:0}.acoustic-builder-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.7rem}.acoustic-builder-grid label{display:grid;gap:.35rem;color:var(--muted);font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}.acoustic-builder-grid select{width:100%;min-width:0;color:var(--text);background:#0b1220;border:1px solid var(--line2);border-radius:.7rem;padding:.72rem;text-transform:none;letter-spacing:normal;font-size:.82rem}.acoustic-builder-grid select:focus{outline:2px solid var(--accent);outline-offset:2px}
.acoustic-result{margin-top:.9rem;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(260px,.9fr);gap:.85rem}.acoustic-result-copy,.acoustic-meter-card{border:1px solid var(--line);border-radius:.85rem;padding:1rem;background:rgba(8,11,16,.42)}.acoustic-result-copy small,.acoustic-performance-grid small,.acoustic-system-card small{color:var(--accent);font-weight:950;letter-spacing:.1em;text-transform:uppercase}.acoustic-result-copy p{color:var(--soft)}.acoustic-result-copy ul{padding-left:1.1rem;margin:.6rem 0}.acoustic-result-copy li+li{margin-top:.35rem}.acoustic-note{border-left:3px solid var(--amber);padding:.6rem .75rem;background:rgba(245,158,11,.08);color:var(--soft);font-size:.82rem}
.acoustic-meter{display:grid;grid-template-columns:6.7rem 1fr 2.4rem;align-items:center;gap:.55rem;margin:.7rem 0}.acoustic-meter label{color:var(--muted);font-size:.74rem;font-weight:900}.acoustic-meter-track{height:.55rem;border-radius:99px;background:#080b10;overflow:hidden;border:1px solid var(--line)}.acoustic-meter-track span{display:block;height:100%;width:var(--score);border-radius:inherit;background:linear-gradient(90deg,var(--accent2),var(--accent));transform-origin:left;animation:meter-fill .85s cubic-bezier(.2,.8,.2,1)}.acoustic-meter output{font-size:.7rem;color:var(--soft);text-align:right}@keyframes meter-fill{from{transform:scaleX(0)}to{transform:scaleX(1)}}.acoustic-meter-legend{margin:.75rem 0 0;color:var(--muted);font-size:.7rem}
.acoustic-performance-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;margin:1rem 0}.acoustic-system-head{margin-top:1.25rem}.acoustic-system-list{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem}.acoustic-system-card h3{margin-top:.55rem}.acoustic-use-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.65rem;margin:1rem 0}.acoustic-use-grid div{display:grid;gap:.35rem;padding:.85rem;border-top:2px solid var(--accent2);background:rgba(8,11,16,.28)}.acoustic-use-grid span{color:var(--soft);font-size:.82rem}.acoustic-boundary{display:grid;grid-template-columns:12rem 1fr;gap:1rem;align-items:start;padding:1rem;border-radius:.85rem;background:linear-gradient(90deg,rgba(34,197,94,.12),rgba(125,211,252,.07));border:1px solid rgba(34,197,94,.35)}.acoustic-boundary strong{color:#86efac}.acoustic-boundary p{margin:0;color:var(--soft)}
@media(max-width:900px){.acoustic-builder-grid,.acoustic-system-list,.acoustic-use-grid{grid-template-columns:repeat(2,1fr)}.acoustic-result{grid-template-columns:1fr}.hero-soundscape{display:none}}@media(max-width:650px){.acoustic-heading{grid-template-columns:1fr}.sound-signature{height:4.5rem}.acoustic-principles,.acoustic-performance-grid,.acoustic-builder-grid,.acoustic-system-list,.acoustic-use-grid{grid-template-columns:1fr}.acoustic-boundary{grid-template-columns:1fr}.ambient-orb{width:18rem}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.ambient-orb,.hero-soundscape span,.sound-signature span,.panel.active,.acoustic-meter-track span{animation:none!important}.motion-hero{transform:none!important}.motion-ready [data-reveal],.motion-ready [data-reveal].is-visible,.motion-ready [data-reveal].is-visible.motion-card{opacity:1;transform:none;transition:none}.motion-card{transition:none}}