/* ================================================================
   THE GENIUS SONG (eng-us-TheGeniusSong.com) - DEEP DESIGN SYSTEM
================================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: #f1f5f9;
  background-color: #0f172a;
  background: radial-gradient(ellipse at 50% 0%, #1e1b4b 0%, #0f172a 70%);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

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

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

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

ul {
  list-style: none;
}

:root {
  --cyan: #06b6d4;
  --cyan-bright: #22d3ee;
  --cyan-glow: rgba(6, 182, 212, 0.4);
  --purple: #8b5cf6;
  --purple-light: #c084fc;
  --purple-dark: #6d28d9;
  --blue-deep: #0f172a;
  --blue-card: #1e293b;
  --blue-card-hover: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --green-check: #10b981;
  --green-glow: rgba(16, 185, 129, 0.3);
  --gold-star: #fbbf24;
  --pink-accent: #ec4899;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(6, 182, 212, 0.18);
  --shadow-lg: 0 20px 50px rgba(6, 182, 212, 0.28);
  --container: 1200px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.text-cyan { color: var(--cyan-bright); }
.text-purple { color: var(--purple-light); }
.text-muted { color: var(--text-muted); }
.center { text-align: center; }

/* ================================================================
   TOP ANNOUNCEMENT BAR
================================================================ */
.top-strip {
  background: linear-gradient(90deg, #4c1d95 0%, #1e1b4b 50%, #065f46 100%);
  color: #ffffff;
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 10px 16px;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-strip strong {
  color: #a7f3d0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.countdown {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.countdown span {
  background: rgba(255, 255, 255, 0.2);
  padding: 3px 8px;
  border-radius: 6px;
  min-width: 32px;
  display: inline-block;
  text-align: center;
}

/* ================================================================
   HEADER
================================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--container);
  margin: 0 auto;
}

.logo {
  font-family: 'Inter', sans-serif;
  font-weight: 900;
  font-size: 26px;
  color: #ffffff;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.logo .spark {
  color: var(--cyan-bright);
}

.nav-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
}

.nav-links a {
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--cyan-bright);
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 100%);
  color: #ffffff;
  font-weight: 800;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-md);
}

.btn-pill:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(6, 182, 212, 0.4);
  background: linear-gradient(135deg, var(--cyan-bright) 0%, var(--purple-dark) 100%);
}

/* ================================================================
   HERO SECTION
================================================================ */
.hero {
  padding: 50px 0 80px;
  color: var(--text-main);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.08fr;
  gap: 48px;
  align-items: center;
}

.hero-stage {
  position: relative;
  background: radial-gradient(circle at center, rgba(139, 92, 246, 0.2) 0%, rgba(15, 23, 42, 0) 70%),
              rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  padding: 24px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}

.hero-product-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 380px;
}

.hero-product {
  max-height: 360px;
  width: auto;
  filter: drop-shadow(0 20px 35px rgba(6, 182, 212, 0.35));
  transition: transform 0.3s ease;
  border-radius: 12px;
}

.hero-product:hover {
  transform: scale(1.02);
}

.thumbs-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
}

.thumb-btn {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease;
  background: rgba(15, 23, 42, 0.8);
  padding: 3px;
}

.thumb-btn.active, .thumb-btn:hover {
  border-color: var(--cyan-bright);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.4);
}

.thumb-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
}

.ships-badge {
  position: absolute;
  left: 14px;
  bottom: 14px;
  background: rgba(15, 23, 42, 0.9);
  color: var(--cyan-bright);
  font-weight: 700;
  font-size: 12px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(6, 182, 212, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-rating {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.hero-rating .stars {
  color: var(--gold-star);
  font-size: 18px;
  letter-spacing: 2px;
}

.hero-rating .rate-text {
  font-size: 14px;
  color: var(--text-muted);
}

.hero-rating .rate-text strong {
  color: #ffffff;
}

.hero-eyebrow {
  font-size: 12px;
  font-weight: 800;
  color: var(--cyan-bright);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 10px;
  display: block;
}

.hero-title {
  font-size: 42px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 17px;
  color: #cbd5e1;
  margin-bottom: 24px;
  line-height: 1.6;
}

.hero-subtitle .hl {
  color: var(--cyan-bright);
  font-weight: 700;
}

.hero-chips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
  padding: 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 700;
  color: #f1f5f9;
}

.hero-chip .chip-ico {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--cyan);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #0f172a;
  font-weight: 900;
  font-size: 12px;
}

.price-box {
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 18px;
  padding: 24px;
  margin-bottom: 24px;
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.price-current {
  font-size: 44px;
  font-weight: 900;
  color: var(--cyan-bright);
  line-height: 1;
}

.price-old {
  font-size: 20px;
  color: #64748b;
  text-decoration: line-through;
}

.price-save {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
  font-weight: 800;
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.cta-add {
  width: 100%;
  background: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
  color: #ffffff;
  font-weight: 900;
  font-size: 16px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 20px 28px;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.35);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.cta-add:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(6, 182, 212, 0.55);
}

.guarantee-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
  font-size: 14px;
  color: #94a3b8;
  font-weight: 600;
}

.guarantee-row .seal {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--green-check);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 900;
}

/* ================================================================
   MARQUEE BENEFITS TICKER
================================================================ */
.marquee {
  background: rgba(30, 41, 59, 0.5);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  position: relative;
  padding: 16px 0;
}

.marquee-track {
  display: flex;
  width: max-content;
  gap: 0;
  animation: scroll-x 35s linear infinite;
}

.marquee:hover .marquee-track {
  animation-play-state: paused;
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 0 40px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.marquee-item .m-ico {
  color: var(--cyan-bright);
  font-size: 18px;
}

@keyframes scroll-x {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ================================================================
   DEEP NEUROSCIENCE SECTION
================================================================ */
.science-section {
  padding: 90px 0;
  background: rgba(15, 23, 42, 0.6);
}

.section-eyebrow {
  text-align: center;
  font-size: 13px;
  font-weight: 800;
  color: var(--cyan-bright);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  text-align: center;
  font-size: 38px;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 17px;
  max-width: 720px;
  margin: 0 auto 50px;
  line-height: 1.6;
}

/* Brainwave state grid (4 states) */
.waves-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 50px;
}

.wave-card {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: 24px 20px;
  text-align: center;
  transition: all 0.2s ease;
}

.wave-card.featured {
  background: linear-gradient(180deg, rgba(6, 182, 212, 0.2) 0%, rgba(30, 41, 59, 0.8) 100%);
  border-color: var(--cyan-bright);
  box-shadow: 0 8px 30px rgba(6, 182, 212, 0.25);
  transform: translateY(-4px);
}

.wave-card h4 {
  font-size: 18px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.wave-card .hz {
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan-bright);
  margin-bottom: 12px;
  display: block;
}

.wave-card p {
  font-size: 14px;
  color: #94a3b8;
  line-height: 1.5;
}

/* Feature grid 3 columns */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card-feature {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 32px 26px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.card-feature:hover {
  transform: translateY(-6px);
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: var(--shadow-md);
  background: rgba(30, 41, 59, 0.85);
}

.card-feature .ico-wrap {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  border: 1px solid rgba(6, 182, 212, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
  color: var(--cyan-bright);
}

.card-feature h3 {
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.card-feature p {
  color: #94a3b8;
  font-size: 15px;
  line-height: 1.6;
}

.card-feature img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 12px;
  margin-top: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ================================================================
   TIMELINE / JOURNEY SECTION
================================================================ */
.timeline-section {
  padding: 90px 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.1) 0%, rgba(15, 23, 42, 0) 70%);
}

.timeline-wrap {
  position: relative;
  max-width: 860px;
  margin: 40px auto 0;
  padding-left: 40px;
  border-left: 2px solid rgba(6, 182, 212, 0.3);
}

.timeline-step {
  position: relative;
  margin-bottom: 40px;
  padding-left: 20px;
}

.timeline-step::before {
  content: '';
  position: absolute;
  left: -51px;
  top: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--cyan-bright);
  border: 4px solid #0f172a;
  box-shadow: 0 0 12px var(--cyan-bright);
}

.timeline-step h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--cyan-bright);
  margin-bottom: 8px;
}

.timeline-step p {
  font-size: 15.5px;
  color: #cbd5e1;
  line-height: 1.6;
}

/* ================================================================
   COMPARISON MATRIX
================================================================ */
.comparison-section {
  padding: 90px 0;
}

.vs-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 40px;
  background: rgba(30, 41, 59, 0.5);
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.vs-table th, .vs-table td {
  padding: 18px 24px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.vs-table th {
  background: rgba(15, 23, 42, 0.85);
  font-size: 16px;
  font-weight: 800;
  color: #ffffff;
}

.vs-table th.us-col-header {
  background: linear-gradient(180deg, rgba(6, 182, 212, 0.3) 0%, rgba(15, 23, 42, 0.85) 100%);
  color: var(--cyan-bright);
  font-size: 18px;
}

.vs-table td.feature-title {
  text-align: left;
  font-weight: 700;
  color: #f1f5f9;
}

.vs-table td.us-col {
  background: rgba(6, 182, 212, 0.08);
  font-weight: 800;
  color: #ffffff;
}

.check-mark {
  color: #34d399;
  font-weight: 900;
  font-size: 18px;
}

.cross-mark {
  color: #ef4444;
  font-weight: 900;
  font-size: 18px;
}

/* ================================================================
   REVIEWS & TESTIMONIALS
================================================================ */
.reviews-section {
  padding: 90px 0;
  background: rgba(15, 23, 42, 0.6);
}

.review-card {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.review-author-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar-img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--cyan-bright);
  box-shadow: 0 4px 10px rgba(6, 182, 212, 0.2);
}

.review-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.review-author {
  font-weight: 800;
  font-size: 15px;
  color: #ffffff;
  display: block;
}

.review-role {
  font-size: 12px;
  color: var(--text-muted);
  display: block;
}

.verified-tag {
  font-size: 11.5px;
  font-weight: 700;
  color: #34d399;
  background: rgba(16, 185, 129, 0.15);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.review-stars {
  color: var(--gold-star);
  margin-bottom: 12px;
  font-size: 15px;
}

.review-title {
  font-weight: 800;
  font-size: 17px;
  color: #ffffff;
  margin-bottom: 8px;
}

.review-text {
  color: #cbd5e1;
  font-size: 14.5px;
  line-height: 1.6;
  flex: 1;
}

/* Guarantee Badge Display */
.guarantee-box-inner {
  display: flex;
  align-items: center;
  gap: 32px;
}

.guarantee-badge-img {
  width: 140px;
  height: auto;
  filter: drop-shadow(0 8px 20px rgba(251, 191, 36, 0.3));
  flex-shrink: 0;
}

/* ================================================================
   FAQ ACCORDIONS
================================================================ */
.faq-section {
  padding: 90px 0;
}

.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
}

.acc-item {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.acc-item[open] {
  border-color: rgba(6, 182, 212, 0.4);
}

.acc-summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 700;
  font-size: 17px;
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.acc-summary::-webkit-details-marker { display: none; }

.acc-summary::after {
  content: '+';
  font-size: 22px;
  color: var(--cyan-bright);
  font-weight: 400;
  transition: transform 0.2s;
}

.acc-item[open] .acc-summary::after {
  content: '−';
}

.acc-content {
  padding: 0 24px 22px;
  color: #94a3b8;
  font-size: 15px;
  line-height: 1.65;
}

/* References Section */
.ref-section {
  padding: 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
  color: #64748b;
}

.ref-section h4 {
  color: #94a3b8;
  margin-bottom: 12px;
}

.ref-section ol {
  padding-left: 20px;
}

.ref-section li {
  margin-bottom: 6px;
}

/* ================================================================
   FOOTER
================================================================ */
.footer {
  background: #090d16;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 50px 0 30px;
  color: #64748b;
  font-size: 13px;
  line-height: 1.6;
}

.footer p {
  margin-bottom: 14px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 20px 0;
}

.footer-links a {
  color: #94a3b8;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--cyan-bright);
}

/* ================================================================
   RESPONSIVE BREAKPOINTS
================================================================ */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .waves-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .hero-title { font-size: 32px; }
  .section-title { font-size: 28px; }
  .nav-links { display: none; }
  .hero-chips { grid-template-columns: 1fr; }
  .vs-table th, .vs-table td { padding: 12px 14px; font-size: 13.5px; }
  .guarantee-box-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 560px) {
  .waves-grid { grid-template-columns: 1fr; }
}