/* ============================================================
   DE|RIVE Hair Wellness System — Brand Stylesheet
   Dark luxury aesthetic. Black + White + Blue accent.
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --black: #0a0a0a;
  --dark: #111111;
  --dark-card: #161616;
  --dark-border: #222222;
  --gray-900: #1a1a1a;
  --gray-800: #2a2a2a;
  --gray-700: #3a3a3a;
  --gray-600: #555555;
  --gray-500: #777777;
  --gray-400: #999999;
  --gray-300: #bbbbbb;
  --gray-200: #dddddd;
  --white: #ffffff;
  --blue: #4A7BF7;
  --blue-light: #6B9AFF;
  --blue-dark: #3560D4;
  --blue-glow: rgba(74, 123, 247, 0.15);
  --gold: #C9A84C;
  --gold-light: #E0C76E;
  --success: #22c55e;
  --error: #ef4444;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.6);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-main);
  background: var(--black);
  color: var(--gray-300);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--blue-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--white); }

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

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  color: var(--white);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.6rem); }

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

.section {
  padding: 100px 0;
}

.section-dark {
  background: var(--dark);
}

.section-darker {
  background: var(--black);
}

.section-gradient {
  background: linear-gradient(180deg, var(--black) 0%, var(--dark) 100%);
}

/* --- Brand Logo --- */
.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.logo span {
  color: var(--blue);
  font-weight: 400;
  margin: 0 2px;
}

.logo-lg {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  color: var(--gray-400);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.cart-icon {
  position: relative;
  cursor: pointer;
  color: var(--gray-400);
  transition: var(--transition);
}

.cart-icon:hover { color: var(--white); }

.cart-count {
  position: absolute;
  top: -8px;
  right: -10px;
  background: var(--blue);
  color: var(--white);
  font-size: 0.65rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cart-count:empty,
.cart-count[data-count="0"] {
  display: none;
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--blue-light);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(74, 123, 247, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid var(--gray-700);
}

.btn-outline:hover {
  border-color: var(--blue);
  color: var(--blue-light);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--white);
  color: var(--black);
}

.btn-white:hover {
  background: var(--gray-200);
  color: var(--black);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1rem;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.8rem;
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 50%, var(--blue-glow) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(201, 168, 76, 0.1);
  border: 1px solid rgba(201, 168, 76, 0.3);
  border-radius: 100px;
  color: var(--gold);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-badge svg {
  width: 16px;
  height: 16px;
  fill: var(--gold);
}

.hero h1 {
  margin-bottom: 20px;
}

.hero h1 .blue {
  color: var(--blue);
}

.hero-text {
  font-size: 1.15rem;
  color: var(--gray-400);
  margin-bottom: 36px;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 50%;
  max-width: 600px;
  z-index: 1;
  opacity: 0.9;
}

/* --- Section Headers --- */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.section-label {
  display: inline-block;
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  color: var(--gray-500);
  font-size: 1.05rem;
}

/* --- Product Cards --- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.product-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.product-card:hover {
  border-color: var(--gray-700);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card-image {
  aspect-ratio: 1;
  background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.product-card-image img {
  max-height: 280px;
  object-fit: contain;
  transition: var(--transition);
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-body {
  padding: 28px;
}

.product-card-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.product-card-desc {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-price {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
}

.product-price .old {
  font-size: 0.9rem;
  color: var(--gray-600);
  text-decoration: line-through;
  font-weight: 400;
  margin-left: 8px;
}

/* --- Bundle Card (Featured) --- */
.bundle-card {
  background: linear-gradient(135deg, var(--dark-card) 0%, rgba(74, 123, 247, 0.05) 100%);
  border: 1px solid var(--blue-dark);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.bundle-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--blue-glow) 0%, transparent 70%);
  pointer-events: none;
}

.bundle-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--blue);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 100px;
  margin-bottom: 16px;
}

.bundle-price {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 20px 0;
}

.bundle-price .current {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--white);
}

.bundle-price .original {
  font-size: 1.1rem;
  color: var(--gray-600);
  text-decoration: line-through;
}

.bundle-price .save {
  font-size: 0.85rem;
  color: var(--success);
  font-weight: 600;
}

.bundle-features {
  list-style: none;
  margin: 24px 0;
}

.bundle-features li {
  padding: 8px 0;
  color: var(--gray-400);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 12px;
}

.bundle-features li svg {
  width: 18px;
  height: 18px;
  color: var(--blue);
  flex-shrink: 0;
}

/* --- Awards Section --- */
.awards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.award-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius);
  padding: 36px;
  text-align: center;
  transition: var(--transition);
}

.award-card:hover {
  border-color: var(--gold);
  box-shadow: 0 0 30px rgba(201, 168, 76, 0.1);
}

.award-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.award-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--gold);
}

.award-card p {
  color: var(--gray-500);
  font-size: 0.9rem;
}

/* --- How It Works --- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  counter-reset: step;
}

.step-card {
  text-align: center;
  padding: 32px 24px;
  counter-increment: step;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--blue-glow);
  border: 2px solid var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--blue);
}

.step-card h3 {
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.step-card p {
  color: var(--gray-500);
  font-size: 0.9rem;
}

/* --- Testimonials --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius);
  padding: 32px;
}

.testimonial-stars {
  color: var(--gold);
  font-size: 1rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.testimonial-text {
  color: var(--gray-300);
  font-size: 0.95rem;
  font-style: italic;
  margin-bottom: 20px;
  line-height: 1.7;
}

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

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gray-800);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--blue);
  font-size: 0.9rem;
}

.testimonial-name {
  font-weight: 600;
  color: var(--white);
  font-size: 0.9rem;
}

.testimonial-role {
  color: var(--gray-600);
  font-size: 0.8rem;
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 4px;
}

.stat-number .blue {
  color: var(--blue);
}

.stat-label {
  color: var(--gray-500);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Partners Section --- */
.partner-benefits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.benefit-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

.benefit-card:hover {
  border-color: var(--blue);
  transform: translateY(-2px);
}

.benefit-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--blue-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--blue);
}

.benefit-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.benefit-card p {
  color: var(--gray-500);
  font-size: 0.9rem;
}

/* --- Commission Tiers --- */
.tiers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.tier-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
}

.tier-card.featured {
  border-color: var(--blue);
  background: linear-gradient(135deg, var(--dark-card) 0%, rgba(74, 123, 247, 0.08) 100%);
}

.tier-name {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
}

.tier-rate {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 4px;
}

.tier-range {
  color: var(--gray-600);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.tier-example {
  color: var(--gray-400);
  font-size: 0.85rem;
  padding-top: 16px;
  border-top: 1px solid var(--dark-border);
}

/* --- Forms --- */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  color: var(--gray-300);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 16px;
  background: var(--gray-900);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-family: var(--font-main);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-glow);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--gray-600);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* --- Cart Drawer --- */
.cart-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.6);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.cart-overlay.open {
  opacity: 1;
  visibility: visible;
}

.cart-drawer {
  position: fixed;
  top: 0;
  right: -420px;
  width: 400px;
  max-width: 90vw;
  height: 100vh;
  background: var(--dark);
  border-left: 1px solid var(--dark-border);
  z-index: 2001;
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.cart-drawer.open {
  right: 0;
}

.cart-drawer-header {
  padding: 24px;
  border-bottom: 1px solid var(--dark-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cart-drawer-header h3 {
  font-size: 1.1rem;
}

.cart-close {
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  font-size: 1.5rem;
  padding: 4px;
  transition: var(--transition);
}

.cart-close:hover { color: var(--white); }

.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 16px 24px;
}

.cart-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--dark-border);
}

.cart-item-image {
  width: 72px;
  height: 72px;
  background: var(--gray-900);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.7rem;
  color: var(--gray-600);
  text-align: center;
  padding: 4px;
}

.cart-item-details {
  flex: 1;
}

.cart-item-name {
  font-weight: 600;
  color: var(--white);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.cart-item-price {
  color: var(--gray-400);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.cart-item-qty {
  display: flex;
  align-items: center;
  gap: 12px;
}

.qty-btn {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--dark-border);
  background: var(--gray-900);
  color: var(--white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: var(--transition);
}

.qty-btn:hover { border-color: var(--blue); }

.cart-empty {
  text-align: center;
  padding: 48px 0;
  color: var(--gray-600);
}

.cart-footer {
  padding: 24px;
  border-top: 1px solid var(--dark-border);
}

.cart-subtotal {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.cart-subtotal .label { color: var(--gray-400); }
.cart-subtotal .value { color: var(--white); font-weight: 700; }

.cart-total {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-top: 12px;
  border-top: 1px solid var(--dark-border);
  font-size: 1.1rem;
}

.cart-total .label { color: var(--white); font-weight: 600; }
.cart-total .value { color: var(--white); font-weight: 800; }

.referral-input {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.referral-input input {
  flex: 1;
  padding: 10px 14px;
  background: var(--gray-900);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 0.85rem;
}

.referral-input button {
  padding: 10px 16px;
  background: var(--gray-800);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.referral-input button:hover {
  background: var(--blue);
  border-color: var(--blue);
}

.referral-applied {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--success);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

/* --- Subscription Toggle --- */
.purchase-toggle {
  display: flex;
  background: var(--gray-900);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 20px;
}

.toggle-option {
  flex: 1;
  padding: 10px 16px;
  text-align: center;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-500);
  transition: var(--transition);
}

.toggle-option.active {
  background: var(--blue);
  color: var(--white);
}

.toggle-option .save-tag {
  font-size: 0.7rem;
  color: var(--success);
  display: block;
  margin-top: 2px;
}

.toggle-option.active .save-tag {
  color: rgba(255,255,255,0.8);
}

/* --- Footer --- */
.footer {
  background: var(--dark);
  border-top: 1px solid var(--dark-border);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-top: 16px;
  max-width: 300px;
}

.footer h4 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--gray-500);
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--dark-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--gray-600);
  font-size: 0.8rem;
}

/* --- Email Signup Banner --- */
.email-banner {
  background: linear-gradient(135deg, rgba(74, 123, 247, 0.1) 0%, rgba(74, 123, 247, 0.03) 100%);
  border: 1px solid rgba(74, 123, 247, 0.2);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}

.email-form {
  display: flex;
  max-width: 480px;
  margin: 24px auto 0;
  gap: 8px;
}

.email-form input {
  flex: 1;
  padding: 14px 18px;
  background: var(--dark);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 0.95rem;
}

.email-form input:focus {
  outline: none;
  border-color: var(--blue);
}

/* --- Toast Notifications --- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  color: var(--white);
  font-size: 0.9rem;
  z-index: 3000;
  box-shadow: var(--shadow);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--error); }

/* --- Science / Ingredients --- */
.ingredients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.ingredient-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius);
  padding: 28px;
}

.ingredient-card h3 {
  color: var(--blue-light);
  font-size: 1rem;
  margin-bottom: 8px;
}

.ingredient-card p {
  color: var(--gray-500);
  font-size: 0.9rem;
}

/* --- FAQ --- */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--dark-border);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--white);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
}

.faq-question:hover { color: var(--blue-light); }

.faq-icon {
  font-size: 1.2rem;
  color: var(--gray-500);
  transition: transform 0.3s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding-bottom: 20px;
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero-image { display: none; }
  .hero-content { max-width: 100%; }
  .bundle-card { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--dark);
    border-bottom: 1px solid var(--dark-border);
    padding: 24px;
    gap: 16px;
  }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .hero-buttons { flex-direction: column; }
  .email-form { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .products-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .bundle-card { padding: 28px; }
  h1 { font-size: 2rem; }
}