/* ==========================================================================
   THE BRAIN SONG - Long-Form Landing Page Stylesheet
   White Background Design System for all sections except Hero Section
   ========================================================================== */

:root {
  --bg-dark: #070a14;
  --bg-navy: #0d192d;
  --bg-banner: #14355a;

  --bg-light: #ffffff;
  --bg-light-alt: #f8fafc;
  --bg-card-light: #ffffff;
  --border-light: #e2e8f0;

  --primary-cyan: #0077ff;
  --primary-cyan-light: #00f2fe;
  --primary-violet: #7f00ff;
  --primary-yellow: #ffc107;

  --text-dark: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;

  --gradient-main: linear-gradient(135deg, #0080ff 0%, #7f00ff 100%);
  --gradient-hero: linear-gradient(135deg, #070a14 0%, #0d192d 100%);
  --gradient-yellow: linear-gradient(180deg, #ffe066 0%, #ffb700 100%);

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 10px 30px rgba(0, 119, 255, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Global Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-light);
  color: var(--text-body);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

/* Container & Utilities */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.w-100 {
  width: 100%;
}

.margin-bottom-lg {
  margin-bottom: 2rem;
}

.margin-top-md {
  margin-top: 1.25rem;
}

/* Typography */
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  color: var(--text-dark);
  line-height: 1.25;
}

.paragraph {
  color: var(--text-body);
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.clean-section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-dark);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}

/* Section Banner Bar (Dark Blue Header Ribbons for titles) */
.section-banner-bar {
  background: var(--bg-banner);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.75rem 0;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.banner-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0;
}

/* Cards & Light Container Component */
.glass-card {
  background: var(--bg-card-light);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.glass-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-hover);
}

.glowing-hover:hover {
  transform: translateY(-5px);
  border-color: var(--primary-cyan);
}

/* Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-yellow {
  background: var(--gradient-yellow);
  color: #0b0f19;
  box-shadow: 0 4px 18px rgba(255, 193, 7, 0.45);
}

.btn-yellow:hover {
  transform: translateY(-2px);
  background: linear-gradient(180deg, #fff099 0%, #ffa000 100%);
  box-shadow: 0 6px 25px rgba(255, 193, 7, 0.65);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.9rem;
}

.btn-md {
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1.1rem;
}

.btn-xl {
  padding: 1.2rem 2.75rem;
  font-size: 1.25rem;
}

.btn-glow {
  position: relative;
  overflow: hidden;
}

.btn-glow::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: rotate(30deg);
  animation: buttonShine 4s infinite;
}

@keyframes buttonShine {
  0% {
    transform: translateX(-100%) rotate(30deg);
  }

  20%,
  100% {
    transform: translateX(100%) rotate(30deg);
  }
}

/* Top Announcement Bar (Dark Theme) */
.announcement-bar {
  background: linear-gradient(90deg, #14355a 0%, #0d192d 100%);
  color: #ffffff;
  font-size: 0.875rem;
  padding: 0.5rem 0;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.announcement-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.countdown-timer {
  background: rgba(0, 0, 0, 0.35);
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
}

/* Header (Dark Theme) */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 10, 20, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1rem 0;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
  color: #ffffff;
}

.logo-icon {
  color: #342baa;
  font-size: 1.6rem;
}

.logo-text span {
  color: #342baa;
}

.nav-menu {
  display: flex;
  gap: 1.75rem;
  margin-left: auto;
  margin-right: 2rem;
  align-items: center;
}

.nav-link {
  color: #94a3b8;
  font-weight: 500;
  transition: var(--transition);
}

.nav-link:hover {
  color: #00f2fe;
}

/* Section Common Spacing */
section {
  padding: 1.75rem 0;
  background-color: var(--bg-light);
}

.section-header {
  margin-bottom: 1.25rem;
}

/* ==========================================================================
   1. HERO SECTION (KEPT IN DARK SPACE THEME)
   ========================================================================== */
.hero-section {
  position: relative;
  overflow: hidden;
  padding: 2rem 0 1.5rem;
  background: var(--gradient-hero);
  color: #ffffff;
}

.hero-waves-3d-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.75;
}

.hero-section h1,
.hero-section p {
  color: #ffffff;
}

.hero-bg-glow {
  position: absolute;
  top: -10%;
  left: 30%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.18) 0%, transparent 70%);
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-image-column {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.hero-product-img {
  width: 100%;
  max-width: 540px;
  height: auto;
  display: block;
  object-fit: contain;
  position: relative;
  z-index: 1;
  margin: 0 auto;
  filter: drop-shadow(0 15px 35px rgba(0, 119, 255, 0.25));
  transition: var(--transition);
}

.hero-product-img:hover {
  transform: translateY(-5px);
  filter: drop-shadow(0 20px 45px rgba(0, 119, 255, 0.35));
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: #ffffff;
}

.hero-paragraph {
  color: #cbd5e1;
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.hero-price-box {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  margin: 1.5rem 0;
  font-family: var(--font-heading);
}

.regular-price {
  color: #94a3b8;
  font-size: 1.2rem;
}

.special-price {
  font-size: 1.85rem;
  color: var(--primary-yellow);
}

.hero-cta-box {
  margin-bottom: 1.25rem;
}

.hero-guarantee-pill {
  font-size: 0.9rem;
  color: #00f2fe;
  background: rgba(0, 242, 254, 0.08);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(0, 242, 254, 0.25);
}

/* ==========================================================================
   SUBSEQUENT SECTIONS (CLEAN WHITE BACKGROUND)
   ========================================================================== */

/* 2. Reviews Section (White BG) */
.reviews-section {
  background-color: var(--bg-light);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.review-card {
  padding: 2rem;
}

.reviewer-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.reviewer-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-cyan);
}

.reviewer-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
}

.reviewer-location {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.reviewer-stars {
  color: var(--primary-yellow);
  font-size: 0.85rem;
  margin-top: 0.2rem;
}

.review-quote {
  color: var(--text-body);
  font-style: italic;
  line-height: 1.7;
}

/* 3. About Section (White BG) */
.about-section {
  background-color: var(--bg-light-alt);
}

.about-container {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3.5rem;
  align-items: center;
}

.about-img {
  max-width: 100%;
  filter: drop-shadow(0 15px 25px rgba(0, 0, 0, 0.15));
  margin: 0 auto;
}

/* Creator Section (White BG) */
.creator-section {
  background-color: var(--bg-light-alt);
  padding: 2.25rem 0;
}

.creator-container {
  max-width: 920px;
  margin: 0 auto;
}

.creator-content-box {
  padding: 2.5rem;
}

/* Science Section (White BG) */
.science-section {
  background-color: var(--bg-light);
  padding: 2.25rem 0;
}

.science-container {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 3.5rem;
  align-items: center;
}

.science-img {
  max-width: 360px;
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.15));
  transition: var(--transition);
}

.science-img:hover {
  transform: translateY(-5px);
  filter: drop-shadow(0 20px 40px rgba(0, 119, 255, 0.25));
}

/* 3 Free Bonuses Section (White BG) */
.bonuses-section {
  background-color: var(--bg-light-alt);
  padding: 2.25rem 0;
}

.bonuses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.bonus-card {
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.bonus-img-box {
  position: relative;
  text-align: center;
  margin-bottom: 1.25rem;
}

.bonus-cover-img {
  max-width: 160px;
  height: auto;
  margin: 0 auto;
  border-radius: 0.5rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  transition: var(--transition);
}

.bonus-card:hover .bonus-cover-img {
  transform: scale(1.05);
}

.bonus-badge-tag {
  position: absolute;
  top: -10px;
  right: 10px;
  background: var(--gradient-main);
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  box-shadow: 0 4px 10px rgba(0, 119, 255, 0.3);
}

.bonus-value {
  display: inline-block;
  font-size: 0.825rem;
  font-weight: 800;
  color: #10b981;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 0.6rem;
}

.bonus-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.6rem;
  line-height: 1.35;
}

.bonus-info p {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* 4. Does The Brain Song Work? (Paragraph Format) */
.work-section {
  position: relative;
  padding: 2.25rem 0;
  background-color: var(--bg-light);
}

.work-container {
  max-width: 1100px;
  margin: 0 auto;
}

.work-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 992px) {
  .work-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

.work-image-box {
  width: 100%;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-light);
  background: var(--bg-light-alt);
  transition: var(--transition);
}

.work-image-box:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.work-diagram-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 1rem;
  object-fit: cover;
}

.work-paragraph-box {
  padding: 2.5rem;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  box-shadow: var(--shadow-card);
}

.work-steps-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.work-steps-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.work-step-card {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.15rem 1.35rem;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: 0.85rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.work-step-card:hover {
  border-color: var(--primary-cyan);
  transform: translateX(4px);
  box-shadow: var(--shadow-hover);
}

.work-step-num {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary-cyan);
  background: rgba(0, 119, 255, 0.1);
  padding: 0.45rem 0.65rem;
  border-radius: 0.5rem;
  line-height: 1;
  min-width: 42px;
  text-align: center;
}

.work-step-text h4 {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.3rem;
}

.work-step-text p {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--text-body);
}

.work-paragraph-box .paragraph {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 1.25rem;
}

.work-highlight-callout {
  margin-top: 1.75rem;
  padding: 1.25rem 1.5rem;
  background: rgba(0, 119, 255, 0.06);
  border-left: 4px solid var(--primary-cyan);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-dark);
  font-size: 0.95rem;
  line-height: 1.6;
}

.work-highlight-callout i {
  font-size: 1.5rem;
  color: var(--primary-cyan);
  min-width: 24px;
}

/* Meet The Creator Section */
.creator-section {
  position: relative;
  padding: 2.5rem 0;
  background-color: var(--bg-light);
}

.creator-container {
  max-width: 1100px;
  margin: 0 auto;
}

.creator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 992px) {
  .creator-grid {
    grid-template-columns: 340px 1fr;
    gap: 2.5rem;
  }
}

.creator-image-box {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-light);
  background: var(--bg-light-alt);
  transition: var(--transition);
}

.creator-image-box:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.creator-portrait-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 1rem;
}

.creator-badge {
  position: absolute;
  bottom: 0.85rem;
  left: 0.85rem;
  right: 0.85rem;
  background: rgba(13, 25, 45, 0.9);
  backdrop-filter: blur(8px);
  color: #ffffff;
  padding: 0.65rem 0.85rem;
  border-radius: 0.65rem;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.creator-badge h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
}

.creator-badge p {
  font-size: 0.8rem;
  color: var(--primary-cyan-light);
  margin-top: 0.1rem;
}

/* Science Highlights Pills */
.science-highlights {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.science-pill {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.15rem;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--text-dark);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.science-pill:hover {
  border-color: var(--primary-cyan);
  transform: translateX(4px);
}

.science-pill i {
  color: var(--primary-cyan);
  font-size: 1.1rem;
}

/* Science Section Styles - Soft Faded Edge Styling */
.science-section {
  position: relative;
  padding: 2.5rem 0;
  background-color: var(--bg-light);
}

.science-container {
  max-width: 1150px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: stretch;
}

@media (min-width: 992px) {
  .science-container {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

.science-image-col {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

/* Sharp Square Tech Bleed Window Container (Outer window padding extending beyond image borders) */
.science-image-card {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 100%;
  border-radius: 0px;
  overflow: hidden;
  background: var(--bg-light-alt);
  border: 1px solid var(--border-light);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  padding: 0.85rem;
  transition: var(--transition);
  display: flex;
}

.science-image-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1), 0 0 35px rgba(0, 119, 255, 0.12);
  border-color: var(--primary-cyan);
}

.science-img {
  width: 100%;
  height: 100%;
  min-height: 380px;
  display: block;
  object-fit: cover;
  object-position: center;
  border-radius: 0px;
  border: 1px solid var(--border-light);
}

/* Option 2: Tech Research Window Header Bar */
.science-tech-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #0d192d;
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.science-tech-dots {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.science-tech-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red {
  background: #ff5f56;
}

.dot-yellow {
  background: #ffbd2e;
}

.dot-green {
  background: #27c93f;
}

.science-tech-title {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  color: #00f2fe;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Option 3: Pure Full-Bleed Image (No Card Border / Frame) */
.science-image-card.pure-bleed {
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
}

/* 5. Process Pathway Section (How to Use - White BG) */
.process-pathway-section {
  position: relative;
  padding: 2.25rem 0;
  background-color: var(--bg-light-alt);
}

.process-track-wrapper {
  position: relative;
  margin-top: 0.5rem;
}

.process-track-line {
  position: absolute;
  top: 52px;
  left: 15%;
  right: 15%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-cyan) 0%, #a855f7 50%, var(--primary-yellow) 100%);
  opacity: 0.45;
  z-index: 0;
}

.process-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.process-step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.process-node-glow {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1.25rem;
}

.process-badge {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--primary-cyan);
  background: rgba(0, 119, 255, 0.08);
  border: 1px solid rgba(0, 119, 255, 0.25);
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 0.6rem;
}

.process-icon-circle {
  width: 65px;
  height: 65px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid var(--primary-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-cyan);
  font-size: 1.6rem;
  box-shadow: 0 4px 15px rgba(0, 119, 255, 0.2);
  transition: var(--transition);
}

.process-step-item:hover .process-icon-circle {
  transform: scale(1.12);
  background: var(--gradient-main);
  color: #ffffff;
  border-color: #ffffff;
}

.process-card {
  padding: 1.75rem 1.5rem;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.process-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.process-card p {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.55;
}

.process-tag {
  margin-top: 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

/* 6. Features Section (White BG) */
.features-section {
  background-color: var(--bg-light);
}

.features-list-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.feature-list-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.75rem;
  align-items: flex-start;
}

.feature-check-icon {
  font-size: 1.6rem;
  color: var(--primary-cyan);
  margin-top: 0.2rem;
}

.feature-list-item h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.4rem;
}

.feature-list-item p {
  color: var(--text-body);
  font-size: 0.9rem;
}

/* 7. Benefits Showcase Section with Animated 3D Brain Waves Background */
.benefits-showcase-section {
  padding: 3.5rem 0;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-light-alt);
}

.brain-waves-3d-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.benefits-showcase-container {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3.5rem;
  align-items: flex-start;
}

/* Native HTML Neural Expansion Benefits Section Styling */
.neural-expansion-container {
  max-width: 1050px;
  margin: 0 auto;
}

.neural-expansion-main-title {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--text-dark);
  margin-bottom: 2.5rem;
  text-transform: uppercase;
}

.neural-expansion-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 2.5rem;
  align-items: center;
}

@media (max-width: 991px) {
  .neural-expansion-grid {
    grid-template-columns: 1fr;
  }
}

.neural-brain-col {
  display: flex;
  justify-content: center;
  align-items: center;
}

.neural-brain-img {
  width: 100%;
  max-width: 440px;
  height: auto;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 10px 25px rgba(0, 119, 255, 0.15));
}

.neural-flow-col {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.65rem;
  padding-left: 0.5rem;
}

.neural-flow-col::before {
  content: '';
  position: absolute;
  left: 26px;
  top: 25px;
  bottom: 25px;
  width: 2px;
  background: linear-gradient(180deg, #0077ff 0%, #00f2fe 50%, #0077ff 100%);
  opacity: 0.35;
  z-index: 0;
}

.neural-flow-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.neural-node-circle {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #0077ff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0077ff;
  font-size: 1.15rem;
  box-shadow: 0 4px 14px rgba(0, 119, 255, 0.2);
  transition: var(--transition);
}

.neural-flow-item:hover .neural-node-circle {
  background: #0077ff;
  color: #ffffff;
  transform: scale(1.12);
  box-shadow: 0 6px 20px rgba(0, 119, 255, 0.4);
}

.neural-flow-text {
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-light);
  flex: 1;
}

.neural-flow-text h3 {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 0.3rem;
}

.neural-flow-text p {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.5;
}

.benefits-image-card {
  position: sticky;
  top: 100px;
  width: 100%;
  border-radius: 0px;
  overflow: hidden;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.benefits-image-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-cyan);
}

.benefits-hero-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 0px;
}

.benefits-card-header h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-top: 0.5rem;
  margin-bottom: 0.3rem;
}

.benefits-card-header p {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.benefits-header-tag {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary-cyan);
  background: rgba(0, 119, 255, 0.08);
  border: 1px solid rgba(0, 119, 255, 0.2);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  display: inline-block;
}

.benefits-visual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
  text-align: left;
}

.benefit-visual-item {
  padding: 0.9rem;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: 0.85rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  transition: var(--transition);
}

.benefit-visual-item:hover {
  border-color: var(--primary-cyan);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.benefit-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.cyan-glow {
  background: rgba(0, 119, 255, 0.1);
  color: #0077ff;
}

.violet-glow {
  background: rgba(127, 0, 255, 0.1);
  color: #7f00ff;
}

.gold-glow {
  background: rgba(255, 193, 7, 0.15);
  color: #d97706;
}

.green-glow {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
}

.benefit-visual-item h4 {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.benefit-visual-item p {
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.benefits-hero-img {
  border-radius: 1rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  margin-bottom: 1.5rem;
}

.visual-card-text h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 0.4rem;
}

.visual-card-text p {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.5;
}

.visual-badge {
  margin-top: 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.1rem;
  border-radius: 999px;
  background: rgba(0, 119, 255, 0.08);
  border: 1px solid rgba(0, 119, 255, 0.25);
  color: var(--primary-cyan);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Vertical Flow Stream Interface */
.benefits-flow-column {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  padding-left: 0.5rem;
}

.benefits-flow-column::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 25px;
  bottom: 25px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-cyan) 0%, var(--primary-violet) 100%);
  opacity: 0.35;
  z-index: 0;
}

.flow-item {
  display: flex;
  gap: 1.75rem;
  align-items: flex-start;
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.flow-node {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid var(--primary-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-cyan);
  font-size: 1.3rem;
  box-shadow: 0 4px 12px rgba(0, 119, 255, 0.15);
  transition: var(--transition);
  position: relative;
}

.flow-step-badge {
  position: absolute;
  top: -12px;
  background: var(--text-dark);
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 800;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  letter-spacing: 0.05em;
  white-space: nowrap;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.flow-node.node-cyan {
  border-color: #0077ff;
  color: #0077ff;
  box-shadow: 0 4px 14px rgba(0, 119, 255, 0.25);
}

.flow-node.node-violet {
  border-color: #7f00ff;
  color: #7f00ff;
  box-shadow: 0 4px 14px rgba(127, 0, 255, 0.25);
}

.flow-node.node-gold {
  border-color: #d97706;
  color: #d97706;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.25);
}

.flow-node.node-blue {
  border-color: #0284c7;
  color: #0284c7;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.25);
}

.flow-node.node-green {
  border-color: #10b981;
  color: #10b981;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
}

.flow-node.node-rose {
  border-color: #e11d48;
  color: #e11d48;
  box-shadow: 0 4px 14px rgba(225, 29, 72, 0.25);
}

.flow-item:hover .flow-node {
  background: var(--gradient-main);
  color: #ffffff;
  transform: scale(1.15);
  border-color: #ffffff;
}

.flow-content.glass-card {
  padding: 1.25rem 1.5rem;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: 0.85rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  flex: 1;
}

.flow-content.glass-card:hover {
  border-color: var(--primary-cyan);
  transform: translateX(4px);
  box-shadow: var(--shadow-hover);
}

.flow-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.75rem;
  padding: 0.25rem 0.65rem;
  background: rgba(0, 119, 255, 0.06);
  border-radius: 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-cyan);
}

.flow-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.4rem;
  transition: var(--transition);
}

.flow-item:hover .flow-content h3 {
  color: var(--primary-cyan);
}

.flow-content p {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* 8. Pros & Cons Section (White BG) */
.pros-cons-section {
  background-color: var(--bg-light);
}

.pros-cons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.pros-card,
.cons-card {
  padding: 2.25rem;
}

.pros-title {
  font-size: 1.4rem;
  color: #10b981;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.cons-title {
  font-size: 1.4rem;
  color: #ef4444;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.pros-list,
.cons-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pros-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--text-body);
  font-size: 0.95rem;
}

.pros-list i {
  color: #10b981;
  margin-top: 0.2rem;
}

.cons-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--text-body);
  font-size: 0.95rem;
}

.cons-list i {
  color: #ef4444;
  margin-top: 0.2rem;
}

/* 8.5 Guarantee Section (White BG) */
.guarantee-section {
  background-color: var(--bg-light-alt);
  padding: 2.25rem 0;
}

.guarantee-card {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 2.5rem;
  align-items: center;
  padding: 2.5rem;
}

.guarantee-badge-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.guarantee-official-badge {
  max-width: 190px;
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 10px 25px rgba(212, 175, 55, 0.35));
  transition: var(--transition);
}

.guarantee-official-badge:hover {
  transform: scale(1.05);
}

.seal-gold-ring {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(135deg, #ffe066 0%, #ffb700 30%, #d4af37 50%, #ffe066 70%, #996515 100%);
  padding: 8px;
  box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4), inset 0 2px 5px rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
}

.seal-inner-navy {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(145deg, #14355a 0%, #070a14 100%);
  border: 2px dashed rgba(255, 224, 102, 0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #ffffff;
  box-shadow: inset 0 4px 10px rgba(0, 0, 0, 0.6);
  padding: 0.5rem;
}

.seal-stars {
  color: #ffe066;
  font-size: 0.65rem;
  letter-spacing: 2px;
  margin-bottom: 0.1rem;
}

.seal-number {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 0.9;
  background: linear-gradient(180deg, #ffffff 0%, #ffe066 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.seal-unit {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: #ffe066;
  line-height: 1;
}

.seal-subtitle {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #94a3b8;
  margin-top: 0.1rem;
}

.seal-tag {
  font-size: 0.55rem;
  font-weight: 800;
  color: #00f2fe;
  letter-spacing: 0.05em;
}

.seal-ribbon {
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, #ffc107 0%, #ff8f00 100%);
  color: #070a14;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  padding: 0.25rem 1rem;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  white-space: nowrap;
  border: 1px solid #ffe066;
}

.guarantee-pill-tag {
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--primary-cyan);
  background: rgba(0, 119, 255, 0.08);
  border: 1px solid rgba(0, 119, 255, 0.25);
  padding: 0.35rem 1rem;
  border-radius: 999px;
}

.guarantee-headline {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.guarantee-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

.gh-item {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.gh-item i {
  color: #10b981;
}

/* 9. FAQ Section (White BG) */
.faq-section {
  background-color: var(--bg-light-alt);
}

.faq-accordion {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-dark);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  transition: transform 0.3s ease;
  color: var(--primary-cyan);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.5rem;
}

.faq-answer p {
  color: var(--text-body);
  font-size: 1rem;
  padding-bottom: 1.25rem;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-item.active .faq-answer {
  max-height: 200px;
}

/* 10. Final CTA & Sticky Mobile Bar */
.final-cta-section {
  background: linear-gradient(180deg, var(--bg-light) 0%, #f1f5f9 100%);
  padding: 2rem 0;
}

.final-cta-section h2 {
  color: var(--text-dark);
}

.final-devices-img {
  width: 100%;
  max-width: 520px;
  height: auto;
  margin: 0 auto;
  display: block;
  image-rendering: -webkit-optimize-contrast;
  filter: drop-shadow(0 15px 35px rgba(0, 119, 255, 0.22));
  transition: var(--transition);
}

.final-devices-img:hover {
  transform: translateY(-4px) scale(1.02);
  filter: drop-shadow(0 20px 45px rgba(0, 119, 255, 0.32));
}

.secure-checkout-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.sticky-cta-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(16px);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.75rem 0;
  z-index: 999;
  transform: translateY(100%);
  transition: transform 0.4s ease;
  color: #ffffff;
}

.sticky-cta-bar.visible {
  transform: translateY(0);
}

.sticky-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sticky-text {
  display: flex;
  flex-direction: column;
}

.sticky-text strong {
  font-size: 1rem;
  color: #ffffff;
}

.sticky-text span {
  font-size: 0.8rem;
  color: #94a3b8;
}

/* 11. Footer (Dark Navy contrast) */
.footer {
  background: #0f172a;
  color: #ffffff;
  padding: 3rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  margin-bottom: 1rem;
}

.footer-copy {
  color: #94a3b8;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.footer-links {
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: #cbd5e1;
}

.footer-links a:hover {
  color: #00f2fe;
}

.disclaimer-text {
  max-width: 900px;
  margin: 0 auto;
  font-size: 0.75rem;
  color: #64748b;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Responsive Media Queries */
@media (max-width: 992px) {

  .hero-container,
  .about-container,
  .reviews-grid,
  .features-list-grid,
  .benefits-showcase-container,
  .pros-cons-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .process-steps-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .process-track-line {
    display: none;
  }

  .visual-hero-card {
    position: relative;
    top: 0;
  }

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

  .hero-title {
    font-size: 2.25rem;
  }

  .banner-title {
    font-size: 1.75rem;
  }

  .clean-section-title {
    font-size: 1.85rem;
  }

  .nav-menu {
    display: none;
  }
}

@media (max-width: 600px) {
  .hero-title {
    font-size: 1.95rem;
  }

  .banner-title {
    font-size: 1.45rem;
  }

  .clean-section-title {
    font-size: 1.55rem;
  }

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

  .btn-lg,
  .btn-xl {
    width: 100%;
    text-align: center;
  }

  .hero-price-box {
    flex-direction: column;
    gap: 0.4rem;
  }
}