/* NutriBoost — Supplements Shop */
:root {
  --nb-primary: #10b981;
  --nb-primary-dark: #059669;
  --nb-dark: #111827;
  --nb-gray-900: #1f2937;
  --nb-gray-700: #374151;
  --nb-gray-500: #6b7280;
  --nb-gray-300: #d1d5db;
  --nb-gray-100: #f3f4f6;
  --nb-white: #ffffff;
  --nb-accent: #f59e0b;
  --nb-danger: #ef4444;
  --nb-radius: 12px;
  --nb-transition: 0.2s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--nb-dark);
  background: var(--nb-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.nb-container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* Buttons */
.nb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem; border-radius: 8px; font-weight: 600; font-size: 0.95rem;
  transition: var(--nb-transition); border: 2px solid transparent;
}
.nb-btn-primary { background: var(--nb-primary); color: white; }
.nb-btn-primary:hover { background: var(--nb-primary-dark); }
.nb-btn-dark { background: var(--nb-dark); color: white; }
.nb-btn-dark:hover { background: var(--nb-gray-700); }
.nb-btn-outline { border-color: var(--nb-gray-300); color: var(--nb-dark); background: white; }
.nb-btn-outline:hover { border-color: var(--nb-primary); color: var(--nb-primary); }
.nb-btn-block { width: 100%; }
.nb-btn-sm { padding: 0.5rem 1rem; font-size: 0.85rem; }
.nb-btn-lg { padding: 1rem 2.5rem; font-size: 1.1rem; }

/* Navbar */
.nb-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nb-gray-100);
}
.nb-nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nb-logo { font-size: 1.4rem; font-weight: 800; color: var(--nb-dark); display: flex; align-items: center; gap: 0.25rem; }
.nb-logo-icon { font-size: 1.6rem; }
.nb-nav-links { display: flex; gap: 2rem; }
.nb-nav-link { font-weight: 500; color: var(--nb-gray-500); transition: var(--nb-transition); }
.nb-nav-link:hover { color: var(--nb-primary); }
.nb-nav-actions { display: flex; align-items: center; gap: 1rem; }
.nb-cart-btn {
  position: relative; color: var(--nb-dark); padding: 0.5rem; border-radius: 8px;
  transition: var(--nb-transition);
}
.nb-cart-btn:hover { background: var(--nb-gray-100); }
.nb-cart-count {
  position: absolute; top: -2px; right: -2px; background: var(--nb-primary); color: white;
  font-size: 0.7rem; font-weight: 700; width: 18px; height: 18px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.nb-menu-btn { display: none; color: var(--nb-dark); padding: 0.5rem; }

@media (max-width: 768px) {
  .nb-nav-links {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: white; flex-direction: column; padding: 1rem 1.5rem; gap: 0.5rem;
    border-bottom: 1px solid var(--nb-gray-100); box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  }
  .nb-nav-links.is-open { display: flex; }
  .nb-menu-btn { display: block; }
}

/* Cart Sidebar */
.nb-cart-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 998;
}
.nb-cart-overlay.is-open { display: block; }
.nb-cart-sidebar {
  position: fixed; top: 0; right: -420px; width: 400px; max-width: 90vw; height: 100vh;
  background: white; z-index: 999; display: flex; flex-direction: column;
  box-shadow: -4px 0 20px rgba(0,0,0,0.1); transition: right 0.3s ease;
}
.nb-cart-sidebar.is-open { right: 0; }
.nb-cart-header { display: flex; justify-content: space-between; align-items: center; padding: 1.5rem; border-bottom: 1px solid var(--nb-gray-100); }
.nb-cart-header h3 { font-size: 1.1rem; font-weight: 700; }
.nb-cart-close { font-size: 1.8rem; color: var(--nb-gray-500); }
.nb-cart-items { flex: 1; overflow-y: auto; padding: 1rem 1.5rem; }
.nb-cart-empty { text-align: center; color: var(--nb-gray-500); padding: 3rem 0; }
.nb-cart-item { display: flex; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--nb-gray-100); align-items: center; }
.nb-cart-item img { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; }
.nb-cart-item-info { flex: 1; }
.nb-cart-item-name { font-weight: 600; font-size: 0.9rem; }
.nb-cart-item-price { color: var(--nb-gray-500); font-size: 0.85rem; }
.nb-cart-item-qty { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.25rem; }
.nb-cart-item-qty button { width: 26px; height: 26px; border-radius: 6px; background: var(--nb-gray-100); font-size: 1rem; display: flex; align-items: center; justify-content: center; }
.nb-cart-item-qty span { font-weight: 600; font-size: 0.9rem; min-width: 20px; text-align: center; }
.nb-cart-item-remove { color: var(--nb-gray-300); font-size: 1.4rem; }
.nb-cart-item-remove:hover { color: var(--nb-danger); }
.nb-cart-footer { padding: 1.5rem; border-top: 1px solid var(--nb-gray-100); }
.nb-cart-total { display: flex; justify-content: space-between; font-weight: 700; font-size: 1.1rem; margin-bottom: 1rem; }

/* Hero */
.nb-hero {
  background: linear-gradient(135deg, var(--nb-dark) 0%, #1e3a5f 100%);
  color: white; padding: 6rem 0; text-align: center;
}
.nb-hero h1 { font-size: 3.2rem; font-weight: 800; line-height: 1.1; margin-bottom: 1rem; }
.nb-hero p { font-size: 1.2rem; color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 2rem; }
@media (max-width: 768px) { .nb-hero h1 { font-size: 2rem; } .nb-hero { padding: 4rem 0; } }

/* Section */
.nb-section { padding: 5rem 0; }
.nb-section-header { text-align: center; margin-bottom: 3rem; }
.nb-section-header h2 { font-size: 2rem; font-weight: 800; }
.nb-section-header p { color: var(--nb-gray-500); margin-top: 0.5rem; font-size: 1.05rem; }

/* Product Grid */
.nb-grid { display: grid; gap: 1.5rem; }
.nb-grid-3 { grid-template-columns: repeat(3, 1fr); }
.nb-grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 992px) { .nb-grid-3, .nb-grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 576px) { .nb-grid-3, .nb-grid-4 { grid-template-columns: 1fr; } }

/* Product Card */
.nb-card {
  background: white; border-radius: var(--nb-radius); overflow: hidden;
  border: 1px solid var(--nb-gray-100); transition: var(--nb-transition);
}
.nb-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.08); transform: translateY(-2px); }
.nb-card-img { aspect-ratio: 1; overflow: hidden; background: var(--nb-gray-100); }
.nb-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.nb-card:hover .nb-card-img img { transform: scale(1.05); }
.nb-card-body { padding: 1.25rem; }
.nb-card-cat { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--nb-primary); font-weight: 600; }
.nb-card-title { font-size: 1rem; font-weight: 700; margin: 0.25rem 0 0.5rem; }
.nb-card-price { font-size: 1.1rem; font-weight: 700; color: var(--nb-dark); }
.nb-card-price .nb-compare { text-decoration: line-through; color: var(--nb-gray-500); font-size: 0.9rem; font-weight: 400; margin-left: 0.5rem; }
.nb-card-badge {
  position: absolute; top: 12px; left: 12px; background: var(--nb-accent); color: white;
  font-size: 0.7rem; font-weight: 700; padding: 0.25rem 0.75rem; border-radius: 20px;
  text-transform: uppercase; letter-spacing: 0.03em;
}
.nb-card-img { position: relative; }

/* Product Detail */
.nb-product { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; padding: 3rem 0; }
@media (max-width: 768px) { .nb-product { grid-template-columns: 1fr; gap: 2rem; } }
.nb-product-gallery img { width: 100%; border-radius: var(--nb-radius); }
.nb-product-info h1 { font-size: 2rem; font-weight: 800; margin-bottom: 0.5rem; }
.nb-product-price { font-size: 1.8rem; font-weight: 700; color: var(--nb-primary); margin-bottom: 1.5rem; }
.nb-product-desc { color: var(--nb-gray-500); line-height: 1.8; margin-bottom: 2rem; }
.nb-product-variants { margin-bottom: 1.5rem; }
.nb-product-variants label { font-weight: 600; display: block; margin-bottom: 0.5rem; }
.nb-product-variants select {
  width: 100%; padding: 0.75rem 1rem; border: 2px solid var(--nb-gray-300); border-radius: 8px;
  font-size: 1rem; font-family: inherit; background: white;
}
.nb-product-qty { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; }
.nb-product-qty label { font-weight: 600; }
.nb-qty-control { display: flex; align-items: center; border: 2px solid var(--nb-gray-300); border-radius: 8px; overflow: hidden; }
.nb-qty-control button { width: 40px; height: 40px; font-size: 1.2rem; display: flex; align-items: center; justify-content: center; background: var(--nb-gray-100); }
.nb-qty-control input { width: 50px; height: 40px; text-align: center; border: none; font-weight: 600; font-size: 1rem; font-family: inherit; }
.nb-subscription-toggle { margin-bottom: 1.5rem; padding: 1rem; background: var(--nb-gray-100); border-radius: 8px; }
.nb-subscription-toggle label { display: flex; align-items: center; gap: 0.5rem; font-weight: 500; cursor: pointer; }

/* Category Filter */
.nb-filters { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 2rem; justify-content: center; }
.nb-filter-pill {
  padding: 0.5rem 1.25rem; border-radius: 20px; font-size: 0.9rem; font-weight: 500;
  border: 1.5px solid var(--nb-gray-300); color: var(--nb-gray-500); transition: var(--nb-transition);
}
.nb-filter-pill:hover, .nb-filter-pill.is-active {
  border-color: var(--nb-primary); background: var(--nb-primary); color: white;
}

/* Features */
.nb-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
@media (max-width: 768px) { .nb-features { grid-template-columns: 1fr; } }
.nb-feature { text-align: center; padding: 2rem; }
.nb-feature-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.nb-feature h3 { font-weight: 700; margin-bottom: 0.5rem; }
.nb-feature p { color: var(--nb-gray-500); font-size: 0.95rem; }

/* Checkout */
.nb-checkout { max-width: 800px; margin: 0 auto; padding: 3rem 1.5rem; }
.nb-checkout h1 { font-size: 2rem; font-weight: 800; margin-bottom: 2rem; }
.nb-form-group { margin-bottom: 1.25rem; }
.nb-form-group label { display: block; font-weight: 600; margin-bottom: 0.4rem; font-size: 0.9rem; }
.nb-form-group input, .nb-form-group select {
  width: 100%; padding: 0.75rem 1rem; border: 2px solid var(--nb-gray-300); border-radius: 8px;
  font-size: 1rem; font-family: inherit; transition: var(--nb-transition);
}
.nb-form-group input:focus, .nb-form-group select:focus { outline: none; border-color: var(--nb-primary); }
.nb-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 576px) { .nb-form-row { grid-template-columns: 1fr; } }
.nb-radio-group { display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.nb-radio-option {
  flex: 1; padding: 1rem; border: 2px solid var(--nb-gray-300); border-radius: 8px;
  text-align: center; cursor: pointer; transition: var(--nb-transition); font-weight: 600;
}
.nb-radio-option.is-active { border-color: var(--nb-primary); background: rgba(16,185,129,0.05); }
.nb-order-summary { background: var(--nb-gray-100); border-radius: var(--nb-radius); padding: 1.5rem; margin-top: 2rem; }
.nb-order-summary h3 { font-weight: 700; margin-bottom: 1rem; }
.nb-summary-row { display: flex; justify-content: space-between; padding: 0.5rem 0; font-size: 0.95rem; }
.nb-summary-row.nb-total { font-weight: 700; font-size: 1.1rem; border-top: 2px solid var(--nb-gray-300); padding-top: 0.75rem; margin-top: 0.5rem; }

/* Waiting / Spinner page */
.nb-waiting {
  min-height: 70vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 3rem 1.5rem;
}
.nb-spinner {
  width: 48px; height: 48px; border: 4px solid var(--nb-gray-300);
  border-top-color: var(--nb-primary); border-radius: 50%;
  animation: nb-spin 0.8s linear infinite; margin-bottom: 2rem;
}
@keyframes nb-spin { to { transform: rotate(360deg); } }
.nb-waiting h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.75rem; }
.nb-waiting p { color: var(--nb-gray-500); max-width: 400px; }
.nb-waiting .nb-status-msg { margin-top: 1.5rem; font-weight: 600; color: var(--nb-primary); }

/* Confirmation */
.nb-confirmation { max-width: 600px; margin: 0 auto; padding: 4rem 1.5rem; text-align: center; }
.nb-confirmation-icon { font-size: 4rem; margin-bottom: 1rem; }
.nb-confirmation h1 { font-size: 2rem; font-weight: 800; margin-bottom: 0.75rem; }
.nb-confirmation p { color: var(--nb-gray-500); margin-bottom: 2rem; }
.nb-confirmation-details {
  text-align: left; background: var(--nb-gray-100); border-radius: var(--nb-radius);
  padding: 1.5rem; margin-bottom: 2rem;
}
.nb-confirmation-details h3 { font-weight: 700; margin-bottom: 1rem; }
.nb-detail-row { display: flex; justify-content: space-between; padding: 0.4rem 0; font-size: 0.95rem; }
.nb-detail-row span:first-child { color: var(--nb-gray-500); }

/* Footer */
.nb-footer { background: var(--nb-dark); color: white; padding: 4rem 0 2rem; margin-top: 4rem; }
.nb-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem; }
@media (max-width: 768px) { .nb-footer-grid { grid-template-columns: 1fr; gap: 2rem; } }
.nb-footer-brand p { color: rgba(255,255,255,0.5); margin-top: 1rem; font-size: 0.9rem; line-height: 1.7; }
.nb-footer-links h4 { font-weight: 700; margin-bottom: 1rem; }
.nb-footer-links a { display: block; color: rgba(255,255,255,0.5); margin-bottom: 0.5rem; font-size: 0.9rem; transition: var(--nb-transition); }
.nb-footer-links a:hover { color: var(--nb-primary); }
.nb-footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 3rem; padding-top: 2rem; text-align: center; color: rgba(255,255,255,0.3); font-size: 0.85rem; }

/* 404 */
.nb-404 { min-height: 60vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 3rem; }
.nb-404 h1 { font-size: 6rem; font-weight: 800; color: var(--nb-gray-300); }
.nb-404 p { color: var(--nb-gray-500); margin: 1rem 0 2rem; }

/* Dashboard */
.nb-dash { display: flex; min-height: 100vh; }
.nb-dash-sidebar {
  width: 240px; background: var(--nb-dark); color: white; padding: 1.5rem;
  position: fixed; top: 0; left: 0; height: 100vh; overflow-y: auto;
}
.nb-dash-sidebar .nb-logo { color: white; margin-bottom: 2rem; }
.nb-dash-nav a {
  display: block; padding: 0.75rem 1rem; border-radius: 8px; color: rgba(255,255,255,0.6);
  font-weight: 500; margin-bottom: 0.25rem; transition: var(--nb-transition);
}
.nb-dash-nav a:hover, .nb-dash-nav a.is-active { background: rgba(255,255,255,0.1); color: white; }
.nb-dash-content { flex: 1; margin-left: 240px; padding: 2rem; }
@media (max-width: 768px) {
  .nb-dash-sidebar { display: none; }
  .nb-dash-content { margin-left: 0; }
}
.nb-dash-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.nb-dash-header h1 { font-size: 1.5rem; font-weight: 800; }
.nb-stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.nb-stat-card { background: white; border: 1px solid var(--nb-gray-100); border-radius: var(--nb-radius); padding: 1.5rem; }
.nb-stat-card h3 { font-size: 0.85rem; color: var(--nb-gray-500); text-transform: uppercase; letter-spacing: 0.05em; }
.nb-stat-card .nb-stat-value { font-size: 2rem; font-weight: 800; margin-top: 0.5rem; }
.nb-table { width: 100%; border-collapse: collapse; }
.nb-table th { text-align: left; padding: 0.75rem 1rem; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--nb-gray-500); border-bottom: 2px solid var(--nb-gray-100); }
.nb-table td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--nb-gray-100); font-size: 0.9rem; }
.nb-badge { display: inline-block; padding: 0.2rem 0.6rem; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.nb-badge-green { background: #d1fae5; color: #065f46; }
.nb-badge-yellow { background: #fef3c7; color: #92400e; }
.nb-badge-red { background: #fee2e2; color: #991b1b; }
.nb-badge-gray { background: var(--nb-gray-100); color: var(--nb-gray-500); }