/* ==========================================================================
   Tienda Online Ultra Streaming Full - Premium Dark Mode Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@500;600;700;800&display=swap');

:root {
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Color Palette - Ultra Dark Mode */
  --bg-main: #070a11;
  --bg-card: #0f172a;
  --bg-surface: #1e293b;
  --bg-modal: rgba(2, 6, 23, 0.85);
  
  --border-light: #1e293b;
  --border-focus: #3b82f6;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: rgba(59, 130, 246, 0.15);
  
  --accent-binance: #f0b90b;
  --accent-binance-hover: #fcd535;
  
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);

  --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 30px -5px rgba(0, 0, 0, 0.7);
  --shadow-hover: 0 15px 35px -5px rgba(59, 130, 246, 0.25);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-hover);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  padding: 0.85rem 1.5rem;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.nav-brand-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-brand img {
  height: 44px;
  width: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: #000000;
  padding: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Hero Section */
.hero {
  background: linear-gradient(180deg, #070a11 0%, #0f172a 100%);
  border-bottom: 1px solid var(--border-light);
  padding: 3.5rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 450px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, rgba(7, 10, 17, 0) 70%);
  pointer-events: none;
}

.hero-container {
  max-width: 850px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 2.85rem;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.hero-title span {
  background: linear-gradient(135deg, #60a5fa 0%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.hero-features {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.feature-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--border-light);
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  backdrop-filter: blur(8px);
}

.feature-pill svg {
  color: var(--primary);
}

/* Category Filter & Search Bar */
.catalog-header {
  max-width: 1280px;
  margin: 2.5rem auto 1.5rem;
  padding: 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.category-tags {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: none;
}

.category-tags::-webkit-scrollbar {
  display: none;
}

.tag-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.tag-btn:hover, .tag-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}

.search-box {
  position: relative;
  min-width: 280px;
}

.search-box input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.search-box svg {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 18px;
  height: 18px;
}

/* Products Grid Layout - Perfect Alignment */
.products-section {
  max-width: 1280px;
  margin: 0 auto 4rem;
  padding: 0 1.5rem;
  flex: 1;
}

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

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(59, 130, 246, 0.5);
}

.product-image-container {
  position: relative;
  width: 100%;
  height: 165px;
  background: #020617;
  overflow: hidden;
  border-bottom: 1px solid var(--border-light);
}

.product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-card:hover .product-image {
  transform: scale(1.06);
}

.stock-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

.stock-badge.available {
  background: rgba(16, 185, 129, 0.92);
  color: #ffffff;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

.stock-badge.empty {
  background: rgba(239, 68, 68, 0.92);
  color: #ffffff;
}

.product-content {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-category {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.35rem;
}

.product-title {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: #ffffff;
  height: 2.7rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  height: 3.6rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-light);
  margin-top: auto;
}

.price-tag {
  display: flex;
  flex-direction: column;
}

.price-val {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
}

.price-currency {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.45);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: #334155;
  color: #ffffff;
}

.btn-binance {
  background: var(--accent-binance);
  color: #000000;
  font-weight: 700;
}

.btn-binance:hover {
  background: var(--accent-binance-hover);
  box-shadow: 0 4px 16px rgba(240, 185, 11, 0.45);
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg-modal);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: scale(0.95);
  transition: var(--transition);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.25rem;
  color: var(--text-primary);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* Binance Pay QR Card */
.binance-qr-box {
  text-align: center;
  background: rgba(240, 185, 11, 0.08);
  border: 2px dashed #f0b90b;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.25rem 0;
}

.qr-image {
  width: 210px;
  height: 210px;
  margin: 0.75rem auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  background: #ffffff;
  padding: 8px;
}

.credentials-reveal-box {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid var(--success);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 1rem;
}

.credentials-code {
  font-family: monospace;
  font-size: 1.05rem;
  background: #020617;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(16, 185, 129, 0.4);
  word-break: break-all;
  margin: 0.5rem 0;
  color: #34d399;
  font-weight: 700;
}

/* Tabs */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 1.5rem;
}

.tab-btn {
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Footer */
.footer {
  background: #070a11;
  border-top: 1px solid var(--border-light);
  padding: 2.5rem 1.5rem;
  margin-top: auto;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand img {
  height: 36px;
  border-radius: 4px;
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: var(--bg-card);
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow-lg);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 280px;
  border-top: 1px solid var(--border-light);
  border-right: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  animation: slideIn 0.3s ease;
}

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

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Global Overflow Protection */
html, body {
  overflow-x: hidden !important;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0;
}

/* Responsive Layouts */
@media (max-width: 1024px) {
  .products-grid { 
    grid-template-columns: repeat(2, 1fr); 
    gap: 1.25rem;
  }
}

@media (max-width: 640px) {
  .navbar {
    padding: 0.65rem 0.85rem;
  }

  .nav-container {
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem;
  }

  .nav-brand {
    gap: 0.5rem;
  }

  .nav-brand-title {
    font-size: 1.05rem;
  }

  .nav-brand img {
    height: 34px;
  }

  .nav-actions {
    gap: 0.35rem;
    flex-wrap: wrap;
  }

  .nav-actions .btn {
    padding: 0.4rem 0.65rem;
    font-size: 0.75rem;
  }

  .hero {
    padding: 2.25rem 1rem;
  }

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

  .hero-subtitle {
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
  }

  .hero-features {
    gap: 0.5rem;
  }

  .feature-pill {
    font-size: 0.78rem;
    padding: 0.4rem 0.75rem;
  }

  .catalog-header {
    margin: 1.25rem auto 1rem;
    padding: 0 1rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .search-box {
    width: 100%;
    min-width: 100%;
  }

  .products-section {
    padding: 0 1rem;
  }

  .products-grid {
    grid-template-columns: 1fr !important;
    gap: 1.25rem;
  }

  .product-card {
    width: 100%;
  }

  .product-image-container {
    height: 155px;
  }

  .product-title {
    font-size: 1.05rem;
    height: auto;
  }

  .product-description {
    font-size: 0.82rem;
    height: auto;
  }

  .modal-overlay {
    padding: 0.75rem;
  }

  .modal-card {
    width: 95vw !important;
    max-width: 95vw !important;
    border-radius: var(--radius-md);
  }

  .modal-header {
    padding: 1rem;
  }

  .modal-body {
    padding: 1rem;
  }

  .binance-qr-box {
    padding: 1rem 0.5rem;
  }

  .qr-image {
    width: 170px;
    height: 170px;
  }

  .footer-container {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .footer-brand {
    flex-direction: column;
  }
}