/* ========================================
   HUMMED SOUND THERAPIES — Design Tokens
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'Cormorant', Georgia, serif;
  --font-body: 'Satoshi', 'Inter', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* ===== HUMMED BRAND COLORS (Dark-only site) ===== */
  /* Deep space palette from brand assets */
  --color-bg:             #0a0a14;
  --color-surface:        #0f0f1e;
  --color-surface-2:      #141428;
  --color-surface-3:      #1a1a35;
  --color-surface-offset: #12122a;
  --color-divider:        #252545;
  --color-border:         #2a2a50;

  /* Text */
  --color-text:           #e8e6f0;
  --color-text-muted:     #9896b0;
  --color-text-faint:     #5c5a75;

  /* Gold Accent (from waveform) */
  --color-gold:           #cfb53b;
  --color-gold-hover:     #e0c84d;
  --color-gold-active:    #b89e2f;
  --color-gold-glow:      rgba(207, 181, 59, 0.15);

  /* Teal / Aurora (from hummingbird iridescence) */
  --color-teal:           #4ecdc4;
  --color-teal-hover:     #6edbd3;
  --color-teal-dim:       rgba(78, 205, 196, 0.12);

  /* Purple / Indigo (from cosmic background) */
  --color-purple:         #7b68ee;
  --color-purple-hover:   #9585f0;
  --color-purple-dim:     rgba(123, 104, 238, 0.1);
  --color-purple-deep:    #4a3a8a;

  /* Gradients */
  --gradient-cosmic: linear-gradient(135deg, #0a0a14 0%, #1a1040 30%, #12122a 60%, #0a0a14 100%);
  --gradient-aurora: linear-gradient(135deg, rgba(78, 205, 196, 0.08), rgba(123, 104, 238, 0.08));
  --gradient-gold: linear-gradient(135deg, #cfb53b, #e0c84d);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow-gold: 0 0 30px rgba(207, 181, 59, 0.15);
  --shadow-glow-teal: 0 0 30px rgba(78, 205, 196, 0.1);
  --shadow-glow-purple: 0 0 30px rgba(123, 104, 238, 0.1);
}


/* ========================================
   GLOBAL LAYOUT
   ======================================== */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--content-narrow);
}

.container--default {
  max-width: var(--content-default);
}

section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

.display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.display--hero {
  font-size: var(--text-3xl);
  line-height: 1.05;
}

.display--section {
  font-size: var(--text-2xl);
  line-height: 1.1;
}

.display--sub {
  font-size: var(--text-xl);
  line-height: 1.15;
}

.text-gold { color: var(--color-gold); }
.text-teal { color: var(--color-teal); }
.text-purple { color: var(--color-purple); }
.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }

.text-gradient {
  background: linear-gradient(135deg, var(--color-teal), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   NAVIGATION
   ======================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: rgba(10, 10, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(42, 42, 80, 0.4);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.nav--scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav__logo img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-gold);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-weight: 500;
  position: relative;
  padding-bottom: 2px;
  white-space: nowrap;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width 0.3s var(--ease-out);
}

.nav__links a:hover {
  color: var(--color-text);
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__links a.active {
  color: var(--color-gold);
}

.nav__links a.active::after {
  width: 100%;
}

.nav__cta {
  font-size: var(--text-sm) !important;
  color: var(--color-bg) !important;
  background: var(--color-gold);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  text-transform: uppercase !important;
  letter-spacing: 0.06em !important;
  font-weight: 600 !important;
}

.nav__cta:hover {
  background: var(--color-gold-hover) !important;
  color: var(--color-bg) !important;
}

.nav__cta::after {
  display: none !important;
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s var(--ease-out);
}

/* Tighten nav spacing at medium desktop widths to prevent wrapping */
@media (max-width: 1100px) {
  .nav__links {
    gap: var(--space-4);
  }
  .nav__links a {
    font-size: 0.8125rem;
  }
  .nav__cta {
    padding: var(--space-2) var(--space-4);
    white-space: nowrap;
  }
}

/* Switch to hamburger menu earlier to avoid nav collisions */
@media (max-width: 980px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: 100dvh;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-20) var(--space-8);
    gap: var(--space-6);
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    transition: right 0.4s var(--ease-out);
    z-index: 200;
  }

  .nav__links.open {
    right: 0;
  }

  .nav__links a {
    font-size: var(--text-base);
  }

  .nav__overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 150;
  }

  .nav__overlay.open {
    display: block;
  }
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 5rem;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 10, 20, 0.3) 0%,
    rgba(10, 10, 20, 0.6) 50%,
    rgba(10, 10, 20, 0.95) 85%,
    rgba(10, 10, 20, 1) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-8);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border: 1px solid rgba(207, 181, 59, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-8);
  background: rgba(207, 181, 59, 0.05);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: 1.05;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: 0.02em;
}

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

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: 1.6;
}

.hero__ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
  transition: all 180ms var(--ease-out);
  cursor: pointer;
  border: none;
}

.btn--gold {
  background: var(--color-gold);
  color: var(--color-bg);
}

.btn--gold:hover {
  background: var(--color-gold-hover);
  box-shadow: var(--shadow-glow-gold);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
  transform: translateY(-1px);
}

.btn--teal {
  background: var(--color-teal);
  color: var(--color-bg);
}

.btn--teal:hover {
  background: var(--color-teal-hover);
  box-shadow: var(--shadow-glow-teal);
  transform: translateY(-1px);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ========================================
   STATS BAR
   ======================================== */

.stats {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-10);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.stats__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.stats__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-gold);
  line-height: 1;
}

.stats__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

@media (max-width: 640px) {
  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

/* ========================================
   CONDITION GRID
   ======================================== */

.conditions {
  background: var(--color-bg);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section-header .eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--color-gold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  font-weight: 400;
}

.section-header p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.conditions__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.condition-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  transition: all 300ms var(--ease-out);
  overflow: hidden;
}

.condition-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-aurora);
  opacity: 0;
  transition: opacity 300ms var(--ease-out);
}

.condition-card:hover {
  border-color: var(--color-purple);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-purple);
}

.condition-card:hover::before {
  opacity: 1;
}

.condition-card__icon {
  position: relative;
  font-size: 2rem;
  margin-bottom: var(--space-3);
  display: block;
}

.condition-card__title {
  position: relative;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.condition-card__desc {
  position: relative;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .conditions__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .conditions__grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   ABOUT PREVIEW / TRUST SECTION
   ======================================== */

.trust {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.trust__inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-10);
  align-items: center;
}

.trust__logo {
  width: 180px;
  height: 180px;
  border-radius: var(--radius-xl);
  object-fit: cover;
  border: 2px solid var(--color-border);
  box-shadow: var(--shadow-glow-purple);
}

.trust__content h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.trust__content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}

.trust__content .credentials {
  font-size: var(--text-sm);
  color: var(--color-gold);
  font-weight: 500;
}

@media (max-width: 640px) {
  .trust__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .trust__logo {
    margin: 0 auto;
  }
}

/* ========================================
   CTA SECTION
   ======================================== */

.cta-section {
  text-align: center;
  background: var(--gradient-cosmic);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(123, 104, 238, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  position: relative;
}

.cta-section p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin: 0 auto var(--space-8);
  max-width: 500px;
  position: relative;
}

.cta-section .hero__ctas {
  position: relative;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-12);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-10);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__brand-logo img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.footer__brand-logo span {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-gold);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.footer__brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 280px;
}

.footer__col h4 {
  font-size: var(--text-sm);
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.footer__col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer__col a:hover {
  color: var(--color-gold);
}

.footer__bottom {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer__legal {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 600px;
  line-height: 1.6;
}

.footer__attribution {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__attribution a {
  color: var(--color-text-faint);
  text-decoration: underline;
}

@media (max-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 480px) {
  .footer__inner {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   SAFETY BANNER
   ======================================== */

.safety-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: rgba(10, 10, 20, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  transform: translateY(0);
  transition: transform 0.3s var(--ease-out);
}

.safety-banner.dismissed {
  transform: translateY(100%);
}

.safety-banner__close {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding: var(--space-1);
  cursor: pointer;
  opacity: 0.6;
}

.safety-banner__close:hover {
  opacity: 1;
  color: var(--color-text);
}

/* ========================================
   SCIENCE PAGE
   ======================================== */

.page-hero {
  padding-top: calc(5rem + var(--space-16));
  padding-bottom: var(--space-12);
  text-align: center;
  background: var(--gradient-cosmic);
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--color-bg));
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  position: relative;
}

.page-hero p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 650px;
  margin: 0 auto;
  position: relative;
}

/* Modality Tabs */
.modality-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.modality-tab {
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 200ms var(--ease-out);
  background: transparent;
}

.modality-tab:hover {
  border-color: var(--color-purple);
  color: var(--color-text);
}

.modality-tab.active {
  background: var(--color-purple);
  border-color: var(--color-purple);
  color: #fff;
}

.modality-content {
  display: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.modality-content.active {
  display: block;
}

.modality-content h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.modality-content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.modality-content ul {
  list-style: none;
  padding: 0;
}

.modality-content li {
  padding: var(--space-2) 0;
  color: var(--color-text-muted);
  padding-left: var(--space-6);
  position: relative;
}

.modality-content li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-gold);
}

/* Brainwave Table */
.brainwave-table {
  width: 100%;
  overflow-x: auto;
}

.brainwave-table table {
  width: 100%;
  min-width: 700px;
  border-collapse: separate;
  border-spacing: 0;
}

.brainwave-table th {
  font-size: var(--text-xs);
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
}

.brainwave-table td {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-4);
  border-bottom: 1px solid rgba(42, 42, 80, 0.3);
  vertical-align: top;
}

.brainwave-table tr:hover td {
  background: rgba(123, 104, 238, 0.04);
}

.freq-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.freq-badge--delta { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.freq-badge--theta { background: rgba(78, 205, 196, 0.15); color: #4ecdc4; }
.freq-badge--alpha { background: rgba(168, 162, 255, 0.15); color: #a8a2ff; }
.freq-badge--beta  { background: rgba(207, 181, 59, 0.15); color: #cfb53b; }
.freq-badge--gamma { background: rgba(248, 113, 113, 0.15); color: #f87171; }

/* Research Cards */
.research-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.research-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-teal), var(--color-purple));
}

.research-card__stat {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-gold);
  margin-bottom: var(--space-2);
  font-weight: 500;
}

.research-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.research-card__citation {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
  font-style: italic;
}

/* Transparency Section */
.transparency {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.transparency h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.transparency p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

/* Safety Accordion */
.accordion {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion__item {
  border-bottom: 1px solid var(--color-border);
}

.accordion__item:last-child {
  border-bottom: none;
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--text-base);
  font-weight: 500;
  cursor: pointer;
  border: none;
  text-align: left;
}

.accordion__trigger:hover {
  background: var(--color-surface-2);
}

.accordion__icon {
  font-size: var(--text-lg);
  color: var(--color-gold);
  transition: transform 0.3s var(--ease-out);
}

.accordion__item.open .accordion__icon {
  transform: rotate(45deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out);
}

.accordion__content-inner {
  padding: 0 var(--space-6) var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ========================================
   TRACK LIBRARY PAGE
   ======================================== */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-10);
}

.filter-chip {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 200ms var(--ease-out);
  background: transparent;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.filter-chip:hover {
  border-color: var(--color-teal);
  color: var(--color-text);
}

.filter-chip.active {
  background: var(--color-teal);
  border-color: var(--color-teal);
  color: var(--color-bg);
}

.tracks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-5);
}

.track-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all 300ms var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.track-card:hover {
  border-color: var(--color-purple);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-purple);
}

.track-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.track-card__number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.05em;
}

.track-card__badges {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.track-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  font-weight: 500;
}

.track-card__condition {
  font-size: var(--text-sm);
  color: var(--color-teal);
  margin-bottom: var(--space-3);
  font-weight: 500;
}

.track-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.track-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.track-card__version {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.track-card__version--pure {
  background: rgba(207, 181, 59, 0.12);
  color: var(--color-gold);
}

.track-card__version--ambient {
  background: rgba(123, 104, 238, 0.12);
  color: var(--color-purple);
}

.track-card__version--hybrid {
  background: rgba(78, 205, 196, 0.12);
  color: var(--color-teal);
}

/* Track Detail Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.modal-overlay.open {
  display: flex;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  max-width: 640px;
  width: 100%;
  max-height: 85dvh;
  overflow-y: auto;
  padding: var(--space-8);
  position: relative;
}

.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-2);
  line-height: 1;
}

.modal__close:hover {
  color: var(--color-text);
}

.modal h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.modal__condition {
  color: var(--color-teal);
  font-weight: 500;
  margin-bottom: var(--space-6);
}

.modal__section {
  margin-bottom: var(--space-6);
}

.modal__section h4 {
  font-size: var(--text-sm);
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
  font-weight: 600;
}

.modal__section p, .modal__section li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.modal__section ul {
  list-style: none;
  padding: 0;
}

.modal__section li {
  padding-left: var(--space-5);
  position: relative;
  margin-bottom: var(--space-2);
}

.modal__section li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-gold);
}

/* Modality Legend */
.modality-legend {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.modality-legend__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.modality-legend__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.modality-legend__dot--binaural { background: var(--color-purple); }
.modality-legend__dot--isochronic { background: var(--color-teal); }
.modality-legend__dot--vibroacoustic { background: var(--color-gold); }

/* ========================================
   HOW IT WORKS PAGE
   ======================================== */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.step {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(207, 181, 59, 0.1);
  border: 1px solid rgba(207, 181, 59, 0.3);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-gold);
  margin-bottom: var(--space-5);
}

.step h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.step p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

/* Experience cards */
.experience-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}

.experience-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.experience-card h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-teal);
  margin-bottom: var(--space-3);
}

.experience-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: var(--space-4);
}

@media (max-width: 500px) {
  .faq-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   ABOUT PAGE
   ======================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}

.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
}

.about-card__avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--color-surface-2);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  font-size: 2.5rem;
}

.about-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.about-card__title {
  font-size: var(--text-sm);
  color: var(--color-gold);
  margin-bottom: var(--space-4);
  font-weight: 500;
}

.about-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

@media (max-width: 640px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

/* Commitment Section */
.commitment {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.commitment h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.commitment p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
  max-width: 600px;
  margin-inline: auto;
}

/* ========================================
   DOWNLOAD PAGE
   ======================================== */

.download-hero {
  padding-top: calc(5rem + var(--space-20));
  padding-bottom: var(--space-16);
  text-align: center;
  background: var(--gradient-cosmic);
  position: relative;
  overflow: hidden;
}

.download-hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(207, 181, 59, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.store-badges {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: all 200ms var(--ease-out);
  min-width: 200px;
  justify-content: center;
}

.store-badge:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-glow-gold);
  transform: translateY(-2px);
}

.store-badge__icon {
  font-size: 1.8rem;
}

.store-badge__text {
  text-align: left;
}

.store-badge__small {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: block;
}

.store-badge__name {
  font-size: var(--text-base);
  font-weight: 600;
}

.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
  max-width: 800px;
  margin: 0 auto;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.feature-item__icon {
  color: var(--color-gold);
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-item__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Waitlist Form */
.waitlist {
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
}

.waitlist h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.waitlist p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.waitlist__form {
  display: flex;
  gap: var(--space-3);
}

.waitlist__input {
  flex: 1;
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  font-size: var(--text-sm);
  outline: none;
}

.waitlist__input:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(207, 181, 59, 0.1);
}

.waitlist__input::placeholder {
  color: var(--color-text-faint);
}

@media (max-width: 480px) {
  .waitlist__form {
    flex-direction: column;
  }
}

/* ========================================
   WAVEFORM DECORATION (SVG Animated)
   ======================================== */

.waveform-divider {
  display: flex;
  justify-content: center;
  padding: var(--space-6) 0;
  opacity: 0.3;
}

.waveform-divider svg {
  width: 200px;
  height: 24px;
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */

.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* Fallback for browsers without scroll-timeline */
@supports not (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    transition: opacity 0.6s var(--ease-out);
  }
  .fade-in.visible {
    opacity: 1;
  }
}

/* ========================================
   PRODUCTION STANDARDS SECTION
   ======================================== */

.standards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.standard-item {
  text-align: center;
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.standard-item__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-teal);
  margin-bottom: var(--space-2);
}

.standard-item__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ========================================
   PAGE BODY OFFSET
   ======================================== */

.page-body {
  padding-top: 5rem;
}

/* ========================================
   NEWSLETTER INLINE
   ======================================== */

.newsletter-inline {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  max-width: 600px;
  margin: var(--space-10) auto 0;
}

.newsletter-inline h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.newsletter-inline p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  max-width: 100%;
}

/* Production Notes */
.production-note {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: rgba(207, 181, 59, 0.05);
  border: 1px solid rgba(207, 181, 59, 0.15);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.production-note__icon {
  color: var(--color-gold);
  flex-shrink: 0;
  font-size: 1.1rem;
  margin-top: 1px;
}

/* ========================================
   HEADPHONES GUIDANCE
   ======================================== */

.headphones-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.headphones-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.headphones-card h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.headphones-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.headphones-card--required h4 { color: var(--color-gold); }
.headphones-card--optional h4 { color: var(--color-teal); }

@media (max-width: 640px) {
  .headphones-section {
    grid-template-columns: 1fr;
  }
}