html { scroll-behavior: smooth; }
/* ==========================================================================
   BUYITONLINE - CSS VARIABLES & BASE
   ========================================================================== */
:root {
  --tw-slate-950: #020617;
  --tw-slate-900: #0f172a;
  --tw-slate-800: #1e293b;
  --tw-cyan-400: #22d3ee;
  --tw-cyan-500: #06b6d4;
  
  --bio-bg: var(--tw-slate-950);
  --bio-bg-card: rgba(15, 23, 42, 0.7);
  --bio-text: #f8fafc;
  --bio-muted: #94a3b8;
  --bio-accent: var(--tw-cyan-400);
  
  --bio-border: rgba(34, 211, 238, 0.2);
  --bio-border-hover: rgba(34, 211, 238, 0.5);
  
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bio-bg);
  color: var(--bio-text);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.08), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(34, 211, 238, 0.08), transparent 40%);
}

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

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

/* ==========================================================================
   TYPOGRAPHY & BUTTONS
   ========================================================================== */
h1, h2, h3, h4 {
  margin: 0 0 16px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 16px;
  color: var(--bio-muted);
}

.text-gradient {
  background: linear-gradient(135deg, var(--tw-cyan-400), #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.bio-btn-primary, .bio-btn-secondary, .bio-btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 99px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  font-size: 15px;
  cursor: pointer;
}

.bio-btn-primary {
  background: var(--tw-cyan-500);
  color: #fff;
  border: 1px solid transparent;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.bio-btn-primary:hover {
  background: var(--tw-cyan-400);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
}

.bio-btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
}

.bio-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255,255,255,0.2);
}

.bio-btn-outline {
  background: transparent;
  color: var(--tw-cyan-400);
  border: 1px solid var(--tw-cyan-500);
}

.bio-btn-outline:hover {
  background: rgba(6, 182, 212, 0.1);
  transform: translateY(-2px);
}

.bio-btn-primary.large {
  padding: 18px 40px;
  font-size: 18px;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.bio-hero {
  padding: 180px 0 120px;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.bio-hero-overlay {
  position: absolute;
  top: -20%; left: 50%;
  transform: translateX(-50%);
  width: 100%; max-width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(34,211,238,0.15) 0%, transparent 70%);
  z-index: 0;
  pointer-events: none;
}

.bio-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.bio-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.3);
  color: var(--tw-cyan-400);
  border-radius: 99px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
}

.bio-hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  margin-bottom: 24px;
}

.bio-hero-lead {
  font-size: clamp(16px, 2vw, 20px);
  margin-bottom: 40px;
  line-height: 1.6;
}

.bio-hero-ctas {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================================================
   ABOUT THE BRAND
   ========================================================================== */
.bio-about {
  padding: 80px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.bio-about h2 {
  font-size: clamp(32px, 4vw, 48px);
  margin-bottom: 24px;
}

.bio-about h2 strong {
  color: var(--tw-cyan-400);
}

.bio-about-text {
  font-size: clamp(16px, 2vw, 20px);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ==========================================================================
   PRODUCT CATEGORIES
   ========================================================================== */
.bio-section-header {
  margin-bottom: 50px;
}

.bio-section-header h2 {
  font-size: clamp(28px, 4vw, 40px);
}

.bio-categories {
  padding: 100px 0;
}

.bio-category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.bio-cat-card {
  background: var(--bio-bg-card);
  border: 1px solid var(--bio-border);
  border-radius: 20px;
  padding: 32px 24px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--transition);
  cursor: pointer;
}

.bio-cat-card.highlight {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(6, 182, 212, 0.2));
  border-color: rgba(34, 211, 238, 0.4);
}

.bio-cat-card:hover {
  transform: translateY(-5px);
  border-color: var(--bio-border-hover);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.cat-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.bio-cat-card h3 {
  font-size: 18px;
  margin: 0;
}

@media (max-width: 900px) {
  .bio-category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 500px) {
  .bio-category-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SHOPPING EXPERIENCE (FEATURES)
   ========================================================================== */
.bio-features {
  padding: 60px 0 100px;
}

.bio-features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 60px;
}

.bio-feature-item {
  text-align: center;
}

.feature-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.bio-feature-item h4 {
  font-size: 18px;
  margin-bottom: 12px;
}

.bio-feature-item p {
  font-size: 14px;
}

@media (max-width: 900px) {
  .bio-features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 500px) {
  .bio-features-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   MARKETPLACE ECOSYSTEM
   ========================================================================== */
.bio-marketplaces {
  padding: 100px 0;
  background: rgba(15, 23, 42, 0.3);
}

.bio-official-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 24px;
  padding: 60px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  max-width: 800px;
  margin: 0 auto 40px;
}

.official-logo {
  height: 80px;
  width: auto;
  margin-bottom: 24px;
}

.bio-official-content h3 {
  font-size: 28px;
  margin-bottom: 16px;
}

.bio-official-content p {
  font-size: 16px;
  margin-bottom: 32px;
  max-width: 600px;
  margin-inline: auto;
}

.bio-partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bio-partner-card {
  background: var(--bio-bg-card);
  border: 1px solid var(--bio-border);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition);
}

.bio-partner-card:hover {
  transform: translateY(-5px);
  border-color: var(--bio-border-hover);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.partner-img-wrapper {
  background: #fff;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 160px;
}

.partner-img-wrapper img {
  max-height: 100px;
  max-width: 80%;
  object-fit: contain;
}

.partner-content {
  padding: 24px;
  text-align: center;
}

.partner-content h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.partner-content p {
  font-size: 14px;
  margin-bottom: 24px;
  min-height: 60px;
}

@media (max-width: 900px) {
  .bio-partner-grid {
    grid-template-columns: 1fr;
  }
  .bio-official-card {
    padding: 40px 20px;
  }
}

/* ==========================================================================
   INNOVATION IMPACT (COUNTERS)
   ========================================================================== */
.bio-impact {
  padding: 100px 0;
  background: linear-gradient(180deg, transparent, rgba(15, 23, 42, 0.8), transparent);
}

.bio-impact-title {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 16px;
}

.bio-impact-subtitle {
  margin-bottom: 50px;
}

.bio-impact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.bio-impact-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(34, 211, 238, 0.15);
  border-radius: 24px;
  padding: 40px 24px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.bio-impact-card:hover {
  transform: translateY(-8px);
  border-color: rgba(34, 211, 238, 0.4);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3), 0 0 20px rgba(34, 211, 238, 0.1) inset;
}

.bio-impact-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.bio-yt-counter {
  font-size: clamp(40px, 4vw, 56px);
  color: var(--tw-cyan-400);
  margin-bottom: 8px;
  text-shadow: 0 0 20px rgba(34, 211, 238, 0.4);
}

.bio-impact-label {
  font-size: 16px;
  font-weight: 600;
  color: var(--bio-text);
  margin: 0;
}

@media (max-width: 768px) {
  .bio-impact-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   FAQ
   ========================================================================== */
.bio-faq {
  padding: 100px 0;
  background: rgba(15, 23, 42, 0.3);
}

.bio-faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.bio-faq-item {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.bio-faq-item[open] {
  background: rgba(34, 211, 238, 0.05);
  border-color: rgba(34, 211, 238, 0.2);
}

.bio-faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bio-faq-item summary::-webkit-details-marker {
  display: none;
}

.bio-faq-item summary::after {
  content: '+';
  font-size: 20px;
  color: var(--bio-accent);
}

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

.bio-faq-item p {
  padding: 0 24px 24px;
  margin: 0;
  font-size: 15px;
}

/* ==========================================================================
   FINAL CTA
   ========================================================================== */
.bio-final-cta {
  padding: 120px 0;
}

.bio-final-cta h2 {
  font-size: clamp(32px, 5vw, 48px);
  margin-bottom: 24px;
}

.bio-final-cta p {
  font-size: 18px;
  margin-bottom: 40px;
  max-width: 600px;
  margin-inline: auto;
}