:root {
  color-scheme: light dark;
  --canvas: #fff9f3;
  --surface: #f8f2ea;
  --ink: #081220;
  --muted: #596273;
  --divider: #e7e2d6;
  --cobalt: #1d66ff;
  --aqua: #24d2c7;
  --amber: #f2a046;
  --header: rgba(255, 249, 243, 0.92);
  --page-image: url("/images/acoustic-light.png");
  --radius: 20px;
  --shadow: 0 20px 60px rgba(8, 18, 32, 0.08);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0a0f1a;
    --surface: #0e1b2d;
    --ink: #f2f4f7;
    --muted: #a9b3c3;
    --divider: #23334a;
    --cobalt: #2e78ff;
    --aqua: #24d2c7;
    --header: rgba(10, 15, 26, 0.9);
    --page-image: url("/images/acoustic-dark.png");
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
  }
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  line-height: 1.55;
}
a {
  color: inherit;
}
img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--canvas);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(calc(-100% - 24px));
}
.skip-link:focus-visible {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:where(a, button, input, select, textarea):focus-visible {
  outline: 3px solid var(--aqua);
  outline-offset: 3px;
}

.shell {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header);
  border-bottom: 1px solid var(--divider);
  backdrop-filter: blur(18px);
}
.site-nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-size: 20px;
  font-weight: 720;
  letter-spacing: -0.02em;
}
.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
}
.nav-links a {
  text-decoration: none;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid var(--divider);
  border-radius: 12px;
  text-decoration: none;
  font-weight: 680;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}
.button-primary {
  color: white;
  background: var(--cobalt);
  border-color: var(--cobalt);
}
.button-quiet {
  background: transparent;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.hero {
  min-height: 720px;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  align-items: center;
  gap: 56px;
  padding: 88px 0;
}
.hero-art {
  min-height: 590px;
  border-radius: 32px;
  background: var(--page-image) center / cover no-repeat;
  box-shadow: var(--shadow);
}
.eyebrow {
  margin: 0 0 16px;
  color: var(--cobalt);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1,
h2 {
  font-family:
    "Source Serif 4",
    Iowan Old Style,
    Baskerville,
    Georgia,
    serif;
  letter-spacing: -0.045em;
  line-height: 0.98;
  font-weight: 570;
}
h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(58px, 7vw, 92px);
}
h2 {
  margin: 0;
  font-size: clamp(42px, 5vw, 66px);
}
h3 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.lede {
  max-width: 590px;
  margin: 28px 0;
  color: var(--muted);
  font-size: 19px;
}
.fine-print {
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 112px 0;
  border-top: 1px solid var(--divider);
}
.section-heading {
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: 48px;
  align-items: end;
  margin-bottom: 56px;
}
.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}
.feature-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--divider);
}
.feature {
  padding: 34px 30px 34px 0;
  border-bottom: 1px solid var(--divider);
}
.feature + .feature {
  padding-left: 30px;
  border-left: 1px solid var(--divider);
}
.feature p {
  color: var(--muted);
}

.sound-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--divider);
}
.sound {
  min-height: 220px;
  padding: 34px 28px 34px 0;
  border-bottom: 1px solid var(--divider);
}
.sound:nth-child(even) {
  padding-left: 28px;
  border-left: 1px solid var(--divider);
}
.sound-index {
  display: block;
  margin-bottom: 54px;
  color: var(--cobalt);
  font-variant-numeric: tabular-nums;
}
.sound p {
  color: var(--muted);
  max-width: 430px;
}

.faq {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--divider);
}
.faq-item {
  padding: 30px 28px 30px 0;
  border-bottom: 1px solid var(--divider);
}
.faq-item:nth-child(even) {
  padding-left: 28px;
  border-left: 1px solid var(--divider);
}
.faq-item p {
  color: var(--muted);
  max-width: 430px;
}

.session-preview {
  min-height: 680px;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 32px;
  background: #081220 url("/images/acoustic-dark.png") center / cover no-repeat;
  color: #f2f4f7;
  text-align: center;
  box-shadow: var(--shadow);
}
.session-preview h3 {
  margin-bottom: 20px;
  color: #a9b3c3;
  font-size: 16px;
  font-weight: 600;
}
.timer {
  font-size: clamp(72px, 10vw, 132px);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.06em;
}
.phase {
  margin-top: 28px;
  color: #a9b3c3;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.pricing-grid-standard {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 780px;
}
.price {
  display: flex;
  min-height: 330px;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--divider);
  border-radius: var(--radius);
  background: var(--surface);
}
.price-primary {
  border-color: var(--cobalt);
  box-shadow: var(--shadow);
}
.price h2 {
  margin: 0;
  font-family: inherit;
  font-size: 22px;
  font-weight: 720;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.price .amount {
  margin: 34px 0 4px;
  font-size: 42px;
  letter-spacing: -0.05em;
}
.price p {
  color: var(--muted);
}
.price .button {
  margin-top: auto;
}
.tag {
  align-self: flex-start;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--cobalt);
  color: white;
  font-size: 12px;
  font-weight: 720;
}

.legal {
  max-width: 760px;
  padding: 80px 0 120px;
}
.legal h1 {
  font-size: clamp(48px, 7vw, 72px);
}
.legal h2 {
  margin-top: 52px;
  font-family: inherit;
  font-size: 26px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  font-weight: 720;
}
.legal p,
.legal li {
  color: var(--muted);
}

.gate {
  min-height: calc(100vh - 77px);
  display: grid;
  place-items: center;
  padding: 60px 0;
}
.gate-panel {
  width: min(640px, 100%);
  padding: 42px;
  border: 1px solid var(--divider);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.gate-panel h1 {
  font-size: clamp(42px, 8vw, 66px);
}

.consent {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 20;
  width: min(460px, calc(100% - 40px));
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  padding: 22px;
  border: 1px solid var(--divider);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.consent h2 {
  margin: 0 0 8px;
  font-size: 21px;
}
.consent p {
  margin: 0;
  color: var(--muted);
}
.consent-choices {
  display: grid;
  gap: 10px;
  margin: 16px 0;
  padding: 0;
  border: 0;
}
.consent-choice {
  display: grid;
  grid-template-columns: 20px 1fr;
  align-items: start;
  gap: 11px;
  padding: 12px;
  border: 1px solid var(--divider);
  border-radius: 12px;
  cursor: pointer;
}
.consent-choice input {
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  accent-color: var(--cobalt);
}
.consent-choice span {
  color: var(--muted);
  font-size: 14px;
}
.consent-choice strong {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
  font-size: 15px;
}
.consent[hidden] {
  display: none;
}

.site-footer {
  padding: 50px 0;
  border-top: 1px solid var(--divider);
  color: var(--muted);
  font-size: 14px;
}
.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-choice {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

@media (max-width: 820px) {
  .nav-links a:not(.button) {
    display: none;
  }
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 48px 0 64px;
  }
  .hero-art {
    min-height: 340px;
  }
  h1 {
    font-size: clamp(48px, 15vw, 66px);
  }
  .lede {
    margin: 22px 0;
    font-size: 17px;
  }
  .consent {
    right: 12px;
    bottom: 12px;
    width: calc(100% - 24px);
    max-height: calc(100vh - 24px);
    padding: 16px;
  }
  .consent p {
    font-size: 14px;
  }
  .section {
    padding: 80px 0;
  }
  .section-heading {
    grid-template-columns: 1fr;
  }
  .feature-list,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .feature + .feature {
    padding-left: 0;
    border-left: 0;
  }
  .sound-grid,
  .faq {
    grid-template-columns: 1fr;
  }
  .sound:nth-child(even),
  .faq-item:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }
  .session-preview {
    min-height: 560px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}