@font-face {
  font-family: "ZenoSound Nebula Display";
  src: url("/assets/brand/ZenoSoundNebulaDisplay-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light dark;
  --font-display: "ZenoSound Nebula Display", "Orbitron", "Eurostile", "Bank Gothic", sans-serif;
  --font-body: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --bg-0: #0e0e1c;
  --ink: #ececff;
  --ink-soft: #bec1ff;
  --panel: rgba(21, 21, 48, 0.36);
  --panel-hover: rgba(26, 26, 60, 0.3);
  --stroke: rgba(133, 139, 255, 0.3);
  --stroke-strong: rgba(178, 184, 255, 0.5);
  --accent: #8185ff;
  --accent-strong: #9ea2ff;
  --wordmark: #8185ff;
  --shadow: 0 26px 72px rgba(0, 0, 0, 0.48);
}

html[data-theme="dark"] {
  --bg-0: #0e0e1c;
  --ink: #ececff;
  --ink-soft: #bec1ff;
  --panel: rgba(21, 21, 48, 0.36);
  --panel-hover: rgba(26, 26, 60, 0.3);
  --stroke: rgba(133, 139, 255, 0.3);
  --stroke-strong: rgba(178, 184, 255, 0.5);
  --accent: #8185ff;
  --accent-strong: #9ea2ff;
  --wordmark: #8185ff;
  --shadow: 0 26px 72px rgba(0, 0, 0, 0.48);
  --grid-overlay: rgba(17, 17, 36, 0.14);
  --grid-line-a: rgba(138, 147, 255, 0.078);
  --grid-line-b: rgba(138, 147, 255, 0.07);
  --grid-glow-a: rgba(196, 205, 255, 0.4);
  --grid-glow-b: rgba(176, 186, 255, 0.24);
}

html[data-theme="light"] {
  --bg-0: #eef1ff;
  --ink: #1f2150;
  --ink-soft: #5963a1;
  --panel: rgba(255, 255, 255, 0.6);
  --panel-hover: rgba(255, 255, 255, 0.72);
  --stroke: rgba(102, 113, 212, 0.28);
  --stroke-strong: rgba(95, 109, 219, 0.48);
  --accent: #666de6;
  --accent-strong: #5861df;
  --wordmark: #5861df;
  --shadow: 0 24px 58px rgba(74, 84, 160, 0.2);
  --grid-overlay: rgba(255, 255, 255, 0.2);
  --grid-line-a: rgba(122, 135, 233, 0.14);
  --grid-line-b: rgba(122, 135, 233, 0.12);
  --grid-glow-a: rgba(111, 125, 235, 0.32);
  --grid-glow-b: rgba(129, 143, 236, 0.2);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  position: relative;
  background: var(--bg-0);
  color: var(--ink);
  font-family: var(--font-body);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: clamp(1rem, 2.6vw, 2.1rem);
  overflow-x: hidden;
  min-height: 100svh;
}

.warp-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  width: 100%;
  height: 100%;
  opacity: 1;
  display: block;
}

.site-header,
.hero,
.site-footer {
  position: relative;
  z-index: 1;
  width: min(1080px, 100%);
  margin: 0 auto;
}

.glass-card {
  --mx: 50%;
  --my: 50%;
  --x-pct: 50%;
  --y-pct: 50%;
  --inside: 0;
  --edge: 0;
  --top-strength: 0;
  --right-strength: 0;
  --bottom-strength: 0;
  --left-strength: 0;
  --edge-spread-x: 10%;
  --edge-spread-y: 12%;
  --edge-band: 19px;
  border: 1px solid rgba(133, 139, 255, 0.18);
  background: rgba(255, 255, 255, 0.006);
  backdrop-filter: blur(4px) brightness(0.97) saturate(104%);
  -webkit-backdrop-filter: blur(4px) brightness(0.97) saturate(104%);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.14);
  border-radius: 1.35rem;
  overflow: hidden;
  isolation: isolate;
  transition:
    border-color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

html[data-theme="light"] .glass-card {
  border-color: rgba(102, 113, 212, 0.18);
  background: rgba(255, 255, 255, 0.035);
  backdrop-filter: blur(4px) brightness(1) saturate(103%);
  -webkit-backdrop-filter: blur(4px) brightness(1) saturate(103%);
  box-shadow: 0 10px 24px rgba(83, 92, 168, 0.1);
}

.glass-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  padding: 1.15px;
  background:
    linear-gradient(
      90deg,
      transparent calc(var(--x-pct) - var(--edge-spread-x)),
      rgba(247, 249, 255, calc(var(--top-strength) * 1.28)) var(--x-pct),
      transparent calc(var(--x-pct) + var(--edge-spread-x))
    )
      top / 100% var(--edge-band) no-repeat,
    linear-gradient(
      180deg,
      transparent calc(var(--y-pct) - var(--edge-spread-y)),
      rgba(247, 249, 255, calc(var(--right-strength) * 1.28)) var(--y-pct),
      transparent calc(var(--y-pct) + var(--edge-spread-y))
    )
      right / var(--edge-band) 100% no-repeat,
    linear-gradient(
      90deg,
      transparent calc(var(--x-pct) - var(--edge-spread-x)),
      rgba(247, 249, 255, calc(var(--bottom-strength) * 1.28)) var(--x-pct),
      transparent calc(var(--x-pct) + var(--edge-spread-x))
    )
      bottom / 100% var(--edge-band) no-repeat,
    linear-gradient(
      180deg,
      transparent calc(var(--y-pct) - var(--edge-spread-y)),
      rgba(247, 249, 255, calc(var(--left-strength) * 1.28)) var(--y-pct),
      transparent calc(var(--y-pct) + var(--edge-spread-y))
    )
      left / var(--edge-band) 100% no-repeat;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: min(1, calc(var(--edge) * 1.32));
  filter: blur(calc((1 - var(--edge)) * 0.46px));
  transition: opacity 220ms ease, filter 220ms ease;
  z-index: 2;
}

html[data-theme="light"] .glass-card::after {
  background:
    linear-gradient(
      90deg,
      transparent calc(var(--x-pct) - var(--edge-spread-x)),
      rgba(106, 121, 231, calc(var(--top-strength) * 1.1)) var(--x-pct),
      transparent calc(var(--x-pct) + var(--edge-spread-x))
    )
      top / 100% var(--edge-band) no-repeat,
    linear-gradient(
      180deg,
      transparent calc(var(--y-pct) - var(--edge-spread-y)),
      rgba(106, 121, 231, calc(var(--right-strength) * 1.1)) var(--y-pct),
      transparent calc(var(--y-pct) + var(--edge-spread-y))
    )
      right / var(--edge-band) 100% no-repeat,
    linear-gradient(
      90deg,
      transparent calc(var(--x-pct) - var(--edge-spread-x)),
      rgba(106, 121, 231, calc(var(--bottom-strength) * 1.1)) var(--x-pct),
      transparent calc(var(--x-pct) + var(--edge-spread-x))
    )
      bottom / 100% var(--edge-band) no-repeat,
    linear-gradient(
      180deg,
      transparent calc(var(--y-pct) - var(--edge-spread-y)),
      rgba(106, 121, 231, calc(var(--left-strength) * 1.1)) var(--y-pct),
      transparent calc(var(--y-pct) + var(--edge-spread-y))
    )
      left / var(--edge-band) 100% no-repeat;
}

.glass-card:hover,
.glass-card:focus-within {
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.16);
}

html[data-theme="light"] .glass-card:hover,
html[data-theme="light"] .glass-card:focus-within {
  box-shadow: 0 12px 28px rgba(83, 92, 168, 0.12);
}

.glass-card > * {
  position: relative;
  z-index: 1;
}

.site-header {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  padding: 1.05rem clamp(1.2rem, 4.5vw, 3rem);
}

.brand-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.brand-lockup {
  width: clamp(360px, 55vw, 620px);
  max-width: 100%;
  display: block;
  aspect-ratio: 740 / 230;
  margin-left: 0;
  background: var(--wordmark);
  -webkit-mask: url("/assets/brand/zenosound-lettermark.png") center / contain no-repeat;
  mask: url("/assets/brand/zenosound-lettermark.png") center / contain no-repeat;
}

.hero {
  padding: clamp(1.2rem, 4.5vw, 3rem);
  display: grid;
  gap: 1.1rem;
  animation: rise 420ms ease-out;
}

h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.6vw, 4.2rem);
  letter-spacing: 0.03em;
  line-height: 0.95;
}

.subtitle {
  margin: 0;
  max-width: 65ch;
  font-size: clamp(1rem, 2.1vw, 1.2rem);
  line-height: 1.48;
  color: var(--ink-soft);
}

.subtitle strong {
  color: var(--ink);
  font-weight: 700;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.eyebrow-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tag-bubble {
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  padding: 0.45rem 0.72rem;
  font: 700 0.76rem/1 var(--font-body);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: center;
  white-space: nowrap;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.06);
}

html[data-theme="light"] .tag-bubble {
  background: rgba(255, 255, 255, 0.68);
}

.btn {
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  min-height: 44px;
  padding: 0.65rem 1rem;
  text-decoration: none;
  font: 700 0.88rem/1 var(--font-body);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: center;
  white-space: nowrap;
  border: 1px solid var(--stroke);
  appearance: none;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.btn.primary {
  background: linear-gradient(145deg, var(--accent-strong), var(--accent));
  color: #f5f6ff;
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(120, 127, 235, 0.22);
  transition: box-shadow 180ms ease, filter 180ms ease;
}

html[data-theme="dark"] .btn.primary {
  color: var(--bg-0);
}

.btn.primary:hover,
.btn.primary:focus-visible {
  box-shadow:
    0 0 0 1px rgba(176, 182, 255, 0.46),
    0 0 18px rgba(130, 137, 255, 0.38),
    0 10px 24px rgba(75, 83, 194, 0.32);
  filter: brightness(1.02);
}

html[data-theme="light"] .btn.primary:hover,
html[data-theme="light"] .btn.primary:focus-visible {
  box-shadow:
    0 0 0 1px rgba(105, 118, 224, 0.4),
    0 0 14px rgba(115, 126, 233, 0.28),
    0 8px 20px rgba(98, 110, 214, 0.24);
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink);
  transition:
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
}

html[data-theme="light"] .btn.secondary {
  background: rgba(255, 255, 255, 0.68);
}

.btn.secondary:hover,
.btn.secondary:focus-visible {
  border-color: var(--stroke-strong);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

html[data-theme="light"] .btn.secondary:hover,
html[data-theme="light"] .btn.secondary:focus-visible {
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 10px 24px rgba(83, 92, 168, 0.12);
}

.support-copy {
  margin: 0;
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: 0.94rem;
  line-height: 1.5;
}

.header-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: flex-end;
}

.page-main {
  position: relative;
  z-index: 1;
  width: min(1080px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}

.page-hero {
  align-items: start;
}

.eyebrow-label {
  margin: 0;
  color: var(--accent-strong);
  font: 700 0.82rem/1 var(--font-body);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.meta-chip {
  border: 1px solid var(--stroke);
  border-radius: 999px;
  padding: 0.42rem 0.72rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink-soft);
  font-size: 0.8rem;
}

html[data-theme="light"] .meta-chip {
  background: rgba(255, 255, 255, 0.72);
}

.content-grid {
  position: relative;
  z-index: 1;
  width: min(1080px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.content-grid-wide {
  grid-template-columns: minmax(0, 1.18fr) minmax(280px, 0.82fr);
}

.section-card {
  padding: clamp(1.1rem, 3.6vw, 2rem);
  display: grid;
  gap: 0.95rem;
  align-content: start;
}

.section-title,
.platform-card h3,
.evidence-card h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: 0.03em;
}

.section-title {
  font-size: clamp(1.25rem, 3vw, 1.85rem);
  line-height: 1;
}

.section-copy,
.footnote,
.detail-list,
.platform-list,
.status-note,
.trust-checklist-list {
  color: var(--ink-soft);
  line-height: 1.55;
}

.proof-grid,
.evidence-grid {
  display: grid;
  gap: 0.8rem;
}

.proof-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.evidence-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.platform-card,
.evidence-card {
  border: 1px solid var(--stroke);
  border-radius: 1rem;
  padding: 0.95rem;
  background: rgba(255, 255, 255, 0.04);
  display: grid;
  gap: 0.55rem;
}

html[data-theme="light"] .platform-card,
html[data-theme="light"] .evidence-card {
  background: rgba(255, 255, 255, 0.7);
}

.card-kicker {
  margin: 0;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-strong);
}

.platform-list,
.detail-list {
  margin: 0;
  padding-left: 1.1rem;
}

.detail-list li + li,
.platform-list li + li {
  margin-top: 0.45rem;
}

.evidence-card p,
.evidence-card strong {
  margin: 0;
}

.form-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field-span {
  grid-column: 1 / -1;
}

.field label {
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.field input,
.field select,
.field textarea,
.beta-preview {
  width: 100%;
  border-radius: 1rem;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
  padding: 0.85rem 0.95rem;
  font: 500 0.98rem/1.45 var(--font-body);
}

html[data-theme="light"] .field input,
html[data-theme="light"] .field select,
html[data-theme="light"] .field textarea,
html[data-theme="light"] .beta-preview {
  background: rgba(255, 255, 255, 0.8);
}

.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

.beta-preview {
  min-height: 14rem;
  resize: vertical;
}

.status-note {
  margin: 0;
  font-size: 0.9rem;
}

.receipt-card,
.trust-checklist {
  border: 1px solid var(--stroke);
  border-radius: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.04);
  display: grid;
  gap: 0.7rem;
}

html[data-theme="light"] .receipt-card,
html[data-theme="light"] .trust-checklist {
  background: rgba(255, 255, 255, 0.7);
}

.trust-checklist-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.03em;
}

.trust-checklist-list,
.receipt-list {
  margin: 0;
  padding-left: 1.2rem;
}

.trust-checklist-list li + li,
.receipt-list li + li {
  margin-top: 0.45rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
  padding-top: 0.8rem;
  padding-inline: clamp(1.2rem, 4.5vw, 3rem);
  margin-top: auto;
}

.site-footer a {
  color: inherit;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

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

@media (max-width: 900px) {
  .site-header {
    flex-direction: column;
    align-items: center;
  }

  .header-links {
    width: 100%;
    justify-content: flex-start;
  }

  .content-grid,
  .content-grid-wide,
  .proof-grid,
  .evidence-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 540px) {
  body {
    padding: 0.75rem;
  }

  .site-header {
    align-items: center;
    text-align: center;
    padding: 1rem;
  }

  .brand-wrap {
    width: 100%;
    display: flex;
    justify-content: center;
  }

  .brand-lockup {
    width: min(100%, 560px);
    margin-left: 0;
    -webkit-mask: url("/assets/brand/zenosound-lettermark.png") center / contain no-repeat;
    mask: url("/assets/brand/zenosound-lettermark.png") center / contain no-repeat;
  }

  .hero {
    text-align: center;
    justify-items: center;
  }

  .eyebrow-tags,
  .cta-row {
    justify-content: center;
  }

  .header-links {
    justify-content: center;
  }

  .eyebrow-tags {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: min(100%, 29rem);
    align-items: stretch;
    justify-items: stretch;
  }

  .tag-bubble {
    width: 100%;
    min-height: 2.1rem;
  }

  .subtitle {
    margin: 0 auto;
    max-width: 34ch;
  }

  .support-copy {
    text-align: center;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-inline: 0;
  }
}

@media (max-width: 410px) {
  .eyebrow-tags {
    grid-template-columns: 1fr;
    width: min(100%, 18.5rem);
  }
}

@media (pointer: coarse) {
  .warp-grid {
    opacity: 0.7;
  }

  .glass-card::after {
    opacity: calc(0.24 * var(--edge));
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}