:root {
  --bg: #0b0b0c; --surface: #151514; --line: #24221f;
  --ink: #f4efe6; --muted: #9a958d; --amber: #ffb340; --rec: #ff453a;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); line-height: 1.55; }
a { color: var(--amber); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.bar { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center;
  padding: calc(12px + env(safe-area-inset-top, 0px)) 20px 12px; background: rgba(11, 11, 12, .85);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; letter-spacing: .02em; display: flex; align-items: center; gap: 8px; }
.rec-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--rec); box-shadow: 0 0 10px var(--rec); }
.lang { background: none; border: 1px solid var(--line); color: var(--muted); border-radius: 999px; padding: 6px 12px; font: inherit; font-size: 13px; cursor: pointer; }

main { max-width: 980px; margin: 0 auto; padding: 0 20px; }
section { padding: 72px 0; border-bottom: 1px solid var(--line); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); letter-spacing: -.02em; line-height: 1.15; margin: 0 0 16px; text-wrap: balance; }

.hero { padding-top: 48px; }
.listening { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 14px; margin: 0 0 18px; }
.meter { display: inline-flex; gap: 3px; align-items: flex-end; height: 16px; }
.meter i { width: 3px; background: var(--amber); border-radius: 2px; animation: meter 1.1s ease-in-out infinite; }
.meter i:nth-child(2) { animation-delay: .15s; } .meter i:nth-child(3) { animation-delay: .3s; }
.meter i:nth-child(4) { animation-delay: .45s; } .meter i:nth-child(5) { animation-delay: .6s; }
@keyframes meter { 0%, 100% { height: 4px; } 50% { height: 16px; } }

.prompt { font-size: clamp(2rem, 5.6vw, 4rem); line-height: 1.12; letter-spacing: -.03em; font-weight: 700; margin: 0 0 28px; min-height: 3.4em; }
.prompt .w { transition: opacity .25s, color .25s, background-color .25s; opacity: .28; border-radius: 6px; padding: 0 .06em; }
.prompt .w.read { opacity: .32; }
.prompt .w.cur { opacity: 1; background: var(--ink); color: var(--bg); }
.prompt .w.ahead { opacity: .9; }
.prompt .mk { font-size: .32em; vertical-align: .6em; font-weight: 700; color: var(--amber); border: 1px solid rgba(255, 179, 64, .5); border-radius: 6px; padding: .1em .45em; letter-spacing: .04em; }

.hero-actions { margin-bottom: 22px; }
.demo-btn { background: none; color: var(--ink); border: 1px solid var(--ink); border-radius: 999px; padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer; }
.demo-btn:hover { border-color: var(--amber); color: var(--amber); }

.waitlist { max-width: 560px; }
.waitlist .row { display: flex; gap: 8px; flex-wrap: wrap; }
.waitlist input[type=email] { flex: 1 1 240px; min-width: 0; background: var(--surface); border: 1px solid var(--line); color: var(--ink);
  border-radius: 12px; padding: 14px 16px; font: inherit; font-size: 16px; }
.waitlist button[type=submit] { flex: 0 0 auto; background: var(--amber); color: var(--bg); border: 0; border-radius: 12px; padding: 14px 20px; font: inherit; font-weight: 700; cursor: pointer; }
.waitlist button[disabled] { opacity: .6; cursor: progress; }
.consent { display: flex; gap: 10px; align-items: flex-start; margin: 12px 0 6px; font-size: 14px; color: var(--muted); }
.consent input { margin-top: 3px; accent-color: var(--amber); }
.status { min-height: 1.4em; margin: 6px 0; font-size: 14px; }
.status.ok { color: #7ed99a; } .status.err { color: #ff8a80; }
.fine { font-size: 12.5px; color: var(--muted); margin: 6px 0 0; }
.tagline { color: var(--muted); font-size: 14px; margin-top: 18px; }

.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.feat { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 20px; }
.feat h3 { margin: 14px 0 6px; font-size: 1.05rem; }
.feat p { margin: 0; color: var(--muted); font-size: 14.5px; }
.feat-anim { height: 76px; border-radius: 12px; background: #000; padding: 12px; font-weight: 600; display: flex; align-items: center; flex-wrap: wrap; gap: 6px; font-size: 15px; }
.follow span { opacity: .3; animation: follow 3.2s infinite; border-radius: 4px; padding: 0 3px; }
.follow span:nth-child(2) { animation-delay: .8s; } .follow span:nth-child(3) { animation-delay: 1.6s; } .follow span:nth-child(4) { animation-delay: 2.4s; }
@keyframes follow { 0%, 20% { opacity: 1; background: var(--ink); color: #000; } 30%, 100% { opacity: .3; background: none; color: var(--ink); } }
.marks b { font-size: 10px; color: var(--amber); border: 1px solid rgba(255, 179, 64, .5); border-radius: 4px; padding: 1px 5px; }
.marks u { text-decoration-color: var(--amber); text-decoration-thickness: 2px; text-underline-offset: 4px; }
.report { justify-content: space-between; }
.report strong { font-size: 26px; letter-spacing: -.02em; }
.report span { font-size: 12px; color: var(--muted); }

.pay p { color: var(--muted); max-width: 60ch; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; max-width: 520px; margin: 22px 0; }
.compare .col { border-radius: 16px; padding: 16px; border: 1px solid var(--line); display: flex; flex-direction: column; gap: 4px; }
.compare .col span { font-size: 13px; color: var(--muted); }
.compare strong { font-size: 28px; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.compare small { font-size: 13px; color: var(--muted); margin-left: 4px; font-weight: 500; }
.compare .sub strong { text-decoration: line-through; text-decoration-color: var(--rec); color: var(--muted); }
.compare .once { border-color: var(--amber); }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.checks li::before { content: "✓"; color: var(--amber); margin-right: 10px; font-weight: 700; }

.theme-row { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 10px; }
.theme { border: 1px solid var(--line); border-radius: 14px; padding: 0; overflow: hidden; background: none; color: var(--muted); font: inherit; font-size: 12.5px; cursor: pointer; display: flex; flex-direction: column; text-align: left; }
.theme .sample { height: 76px; padding: 12px; font-weight: 700; font-size: 15px; display: flex; align-items: center; }
.theme > span:last-child { padding: 8px 10px; }
.theme[aria-pressed=true] { border-color: var(--amber); color: var(--ink); }
.t-estudio .sample { background: #0b0b0c; color: #f4efe6; } .t-estudio em { background: #f4efe6; color: #0b0b0c; font-style: normal; padding: 0 3px; border-radius: 3px; }
.t-partitura .sample { background: #11161f; color: #e9eef7; font-family: Georgia, serif; } .t-partitura em { color: #7cc4ff; border-bottom: 2px solid #7cc4ff; font-style: normal; }
.t-claquete .sample { background: #f7f7f2; color: #121212; } .t-claquete em { background: #ffd60a; font-style: normal; padding: 0 3px; }
.t-contraste .sample { background: #000; color: #ffe600; font-size: 17px; } .t-contraste em { background: #ffe600; color: #000; font-style: normal; padding: 0 3px; }
.t-papel .sample { background: #f2efe8; color: #2b2a27; font-family: Georgia, serif; } .t-papel em { font-weight: 800; font-style: normal; background: rgba(43, 42, 39, .1); padding: 0 3px; }
.t-vidro .sample { background: #000; color: #fff; } .t-vidro em { background: #fff; color: #000; font-style: normal; padding: 0 3px; }
.mirror { transform: scaleX(-1); }

.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 8px 0 0; }
.cta-end { border-bottom: 0; }

.foot { max-width: 980px; margin: 0 auto; padding: 28px 20px calc(40px + env(safe-area-inset-bottom, 0px)); display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--muted); font-size: 13px; }
.contact { user-select: all; }

.demo { position: fixed; inset: 0; z-index: 20; background: rgba(0, 0, 0, .72); display: grid; place-items: center; padding: 16px; }
.demo[hidden] { display: none; }
.demo-card { width: min(680px, 100%); max-height: 100%; overflow: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 22px; }
.demo-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.demo-head h2 { margin: 0; font-size: 1.3rem; }
.close { background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 50%; width: 36px; height: 36px; cursor: pointer; }
.hint { color: var(--muted); font-size: 14px; }
.demo-text { background: #000; border-radius: 14px; padding: 18px; font-size: clamp(1.2rem, 3.4vw, 1.7rem); line-height: 1.45; font-weight: 600; }
.demo-text .w { opacity: .9; border-radius: 4px; padding: 0 .05em; cursor: pointer; }
.demo-text .w.read { opacity: .3; }
.demo-text .w.cur { opacity: 1; background: var(--ink); color: #000; }
.demo-status { min-height: 1.4em; color: var(--amber); font-size: 14px; }

@media (max-width: 760px) {
  .grid3 { grid-template-columns: 1fr; }
  .theme-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  section { padding: 52px 0; }
}
@media (prefers-reduced-motion: reduce) {
  .meter i, .follow span { animation: none; }
  .prompt .w { transition: none; }
}