/* Binaural Beats: Aura — product site */

:root {
  --ink: #101412;
  --night: #171e1a;
  --paper: #f3eee6;
  --foam: #f8f4ed;
  --sage: #8fbfa4;
  --sage-deep: #3e6b56;
  --gold: #e4b07a;
  --copper: #c4622d;
  --stone: #c4bdb2;
  --stone-dim: #8a847a;
  --line: rgba(243, 238, 230, 0.1);
  --line-strong: #2c3833;
  --bg: #101412;
  --surface: rgba(23, 30, 26, 0.72);
  --text: #f3eee6;
  --text-muted: #c4bdb2;
  --text-subtle: #8a847a;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --font-sans: "Outfit", system-ui, -apple-system, sans-serif;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --max-width: 1080px;
  --nav-height: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

#guide,
#sessions,
#listen,
#premium,
#faq {
  scroll-margin-top: calc(var(--nav-height) + 0.75rem);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: min(100% - 2.5rem, var(--max-width));
  margin-inline: auto;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 50% at 12% -10%, rgba(62, 107, 86, 0.45), transparent 60%),
    radial-gradient(ellipse 50% 40% at 90% 8%, rgba(196, 98, 45, 0.16), transparent 55%),
    radial-gradient(ellipse 40% 30% at 70% 90%, rgba(228, 176, 122, 0.08), transparent 50%),
    var(--bg);
}

.page-bg__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(243, 238, 230, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(243, 238, 230, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 15%, transparent 75%);
}

/* ── Header ── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  border-bottom: 1px solid var(--line);
  background: rgba(16, 20, 18, 0.78);
  backdrop-filter: blur(16px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--paper);
}

.brand__mark {
  width: 36px;
  height: 36px;
  border-radius: 14%;
  object-fit: cover;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.brand__studio {
  display: block;
  margin-top: -2px;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone-dim);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.site-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--stone);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--paper);
}

.site-nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(228, 176, 122, 0.35);
  color: var(--gold) !important;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--paper);
  border: 1px solid var(--line-strong);
}

/* ── Hero ── */

.hero {
  padding: clamp(3.25rem, 8vw, 6rem) 0 clamp(3.5rem, 8vw, 5.5rem);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  margin-bottom: 1.1rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(143, 191, 164, 0.35);
  background: rgba(62, 107, 86, 0.25);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sage);
}

.hero__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.7rem, 6vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.hero__title em {
  font-style: italic;
  font-weight: 500;
  color: var(--gold);
}

.hero__lead {
  margin: 0 0 1.75rem;
  max-width: 36rem;
  font-size: 1.08rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--stone);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 2.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
}

.btn--primary {
  color: var(--ink);
  background: linear-gradient(180deg, #f0c596, var(--gold));
}

.btn--primary:hover {
  filter: brightness(1.05);
}

.btn--ghost {
  color: var(--paper);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
}

.btn--ghost:hover {
  border-color: rgba(243, 238, 230, 0.28);
}

.btn--soon {
  color: var(--ink);
  background: var(--paper);
  cursor: default;
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2rem;
}

.stat__value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 500;
  color: var(--paper);
}

.stat__label {
  font-size: 0.82rem;
  color: var(--stone-dim);
}

.hero__visual {
  position: relative;
}

.hero__frame {
  position: relative;
  overflow: hidden;
  border-radius: 2rem;
  border: 1px solid var(--line);
  background: var(--night);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

.hero__frame img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.hero__chip {
  position: absolute;
  left: 1.1rem;
  right: 1.1rem;
  bottom: 1.1rem;
  padding: 0.95rem 1.05rem;
  border-radius: 1.1rem;
  border: 1px solid rgba(243, 238, 230, 0.14);
  background: rgba(16, 20, 18, 0.72);
  backdrop-filter: blur(12px);
}

.hero__chip-kicker {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.hero__chip-title {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
}

.hero__chip-meta {
  margin: 0.15rem 0 0;
  font-size: 0.88rem;
  color: var(--stone);
}

/* ── Sections ── */

.section {
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
}

.section--surface {
  background: linear-gradient(180deg, rgba(23, 30, 26, 0.55), rgba(16, 20, 18, 0.2));
  border-block: 1px solid var(--line);
}

.section__header {
  max-width: 40rem;
  margin-bottom: 2.25rem;
}

.section__header--center {
  margin-inline: auto;
  text-align: center;
}

.section__eyebrow {
  margin: 0 0 0.55rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sage);
}

.section__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.section__desc {
  margin: 0;
  font-weight: 300;
  color: var(--stone);
  font-size: 1.05rem;
}

.session-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.session-card {
  padding: 1.35rem 1.4rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.04), transparent 42%),
    var(--night);
}

.session-card--wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem 2rem;
  align-items: end;
}

.session-card__hz {
  margin: 0 0 0.45rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

.session-card h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 500;
}

.session-card p {
  margin: 0;
  color: var(--stone);
  font-weight: 300;
}

.session-card__pair {
  margin-top: 1rem;
  font-variant-numeric: tabular-nums;
  font-size: 0.88rem;
  color: var(--stone-dim);
}

.fine-print {
  margin: 1.25rem 0 0;
  font-size: 0.85rem;
  color: var(--stone-dim);
}

.answer {
  margin-bottom: 1.75rem;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(143, 191, 164, 0.28);
  background:
    linear-gradient(160deg, rgba(62, 107, 86, 0.28), transparent 55%),
    var(--night);
}

.answer p {
  margin: 0;
  color: var(--stone);
  font-weight: 300;
}

.answer p + p {
  margin-top: 0.85rem;
}

.answer-lead {
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--paper) !important;
  font-weight: 400 !important;
}

.answer code,
.faq-item code {
  font-size: 0.86em;
  color: var(--gold);
}

.band-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
}

.band-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}

.band-table caption {
  caption-side: bottom;
  padding: 0.75rem 0.2rem 0;
  text-align: left;
  font-size: 0.82rem;
  color: var(--stone-dim);
}

.band-table th,
.band-table td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-weight: 300;
  color: var(--stone);
}

.band-table thead th {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(255, 255, 255, 0.03);
}

.band-table tbody th {
  font-weight: 500;
  color: var(--paper);
}

.band-table tbody tr:last-child th,
.band-table tbody tr:last-child td {
  border-bottom: none;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 46rem;
}

.faq-item {
  padding: 1.15rem 1.25rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(23, 30, 26, 0.65);
}

.faq-item h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.faq-item p {
  margin: 0;
  color: var(--stone);
  font-weight: 300;
}

.pillar-grid,
.offer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

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

.pillar-card,
.offer-card {
  padding: 1.35rem 1.3rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(23, 30, 26, 0.65);
}

.pillar-card h3,
.offer-card h3 {
  margin: 0.35rem 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
}

.pillar-card p,
.offer-card p,
.offer-card li {
  margin: 0;
  color: var(--stone);
  font-weight: 300;
}

.pillar-card__index {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sage);
}

.offer-card--featured {
  border-color: rgba(228, 176, 122, 0.4);
  background:
    linear-gradient(180deg, rgba(228, 176, 122, 0.1), transparent 40%),
    rgba(23, 30, 26, 0.8);
}

.offer-card__badge {
  display: inline-block;
  margin: 0;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sage);
  background: rgba(62, 107, 86, 0.35);
}

.offer-card__badge--pro {
  color: var(--ink);
  background: var(--gold);
}

.offer-card__lead {
  margin-bottom: 0.85rem !important;
}

.offer-card ul {
  margin: 0;
  padding-left: 1.1rem;
}

.offer-card li + li {
  margin-top: 0.4rem;
}

.cta-band {
  padding: clamp(2rem, 5vw, 3rem);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(ellipse 80% 80% at 100% 0%, rgba(62, 107, 86, 0.35), transparent 55%),
    var(--night);
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 500;
}

.cta-band p {
  margin: 0 auto 1.4rem;
  max-width: 36rem;
  color: var(--stone);
  font-weight: 300;
}

.site-footer {
  padding: 1.75rem 0 2.25rem;
  border-top: 1px solid var(--line);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
}

.site-footer__links {
  display: flex;
  gap: 1.25rem;
}

.site-footer__links a {
  font-size: 0.9rem;
  color: var(--stone);
}

.site-footer__links a:hover {
  color: var(--paper);
}

.site-footer__copy {
  margin: 0;
  font-size: 0.82rem;
  color: var(--stone-dim);
}

/* ── Legal ── */

.legal-page {
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(4rem, 8vw, 5rem);
}

.legal-card {
  max-width: 760px;
  margin-inline: auto;
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(23, 30, 26, 0.78);
}

.legal-card h1 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.7rem);
  font-weight: 500;
  line-height: 1.1;
}

.legal-meta {
  margin: 0 0 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.88rem;
  color: var(--stone-dim);
}

.legal-card h2 {
  margin: 2rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
}

.legal-card h3 {
  margin: 1.25rem 0 0.45rem;
  font-size: 1rem;
  font-weight: 600;
}

.legal-card p,
.legal-card li {
  font-size: 0.96rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--stone);
}

.legal-card strong {
  font-weight: 600;
  color: var(--paper);
}

.legal-card ul {
  margin: 0.4rem 0 1rem;
  padding-left: 1.2rem;
}

.legal-card li + li {
  margin-top: 0.35rem;
}

.legal-card a {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-card code {
  font-size: 0.86em;
  color: var(--paper);
}

.legal-summary {
  margin: 0 0 1.4rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(143, 191, 164, 0.3);
  background: rgba(62, 107, 86, 0.18);
}

.legal-summary p {
  margin: 0;
  color: var(--paper);
}

.legal-table-wrap {
  overflow-x: auto;
  margin: 1rem 0 1.25rem;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.legal-table th,
.legal-table td {
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--line-strong);
  text-align: left;
  vertical-align: top;
  font-weight: 300;
  color: var(--stone);
}

.legal-table th {
  font-weight: 600;
  color: var(--paper);
  background: rgba(255, 255, 255, 0.03);
}

/* ── Responsive ── */

@media (max-width: 900px) {
  .hero__grid,
  .session-card--wide,
  .offer-grid {
    grid-template-columns: 1fr;
  }

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

  .hero__visual {
    order: -1;
    max-width: 460px;
    margin-inline: auto;
  }
}

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    padding: 0.85rem 1.25rem 1.15rem;
    border-bottom: 1px solid var(--line);
    background: rgba(16, 20, 18, 0.96);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    padding: 0.7rem 0.25rem;
  }
}

@media (max-width: 720px) {
  .session-grid {
    grid-template-columns: 1fr;
  }

  .site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

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