/* ============================================================
   KVTOOLS store.css 2026
   Páginas: /tienda, /curso/{slug}, /carrito, /checkout
   ============================================================ */

/* ===================== HERO DE TIENDA ===================== */
.store-hero {
  padding: calc(var(--nav-height) + 4rem) 0 5rem;
  background: var(--kv-bg);
  position: relative;
  overflow: hidden;
}

/* Grid background decorativo */
.store-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 85, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 85, 184, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 75%);
}

/* Orbs decorativos */
.store-hero::after {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 85, 184, 0.06) 0%, transparent 70%);
  top: -200px; right: -200px;
  pointer-events: none;
}

.store-hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

/* Hero eyebrow badge */
.hero-eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--kv-blue-50);
  border: 1px solid var(--kv-blue-100);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--kv-blue);
  margin-bottom: var(--space-5);
}
.eyebrow-dot {
  width: 6px; height: 6px;
  background: var(--kv-blue);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.hero-headline { margin-bottom: var(--space-5); }
.hero-headline .hl-blue   { color: var(--kv-blue); }
.hero-headline .hl-orange { color: var(--kv-orange); }

.hero-description {
  font-size: var(--text-md);
  color: var(--kv-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.hero-social-proof {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--kv-border);
}
.proof-avatars {
  display: flex;
}
.proof-avatars img,
.proof-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 2px solid white;
  margin-left: -8px;
  background: var(--kv-blue-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--kv-blue);
}
.proof-avatars :first-child { margin-left: 0; }
.proof-text { font-size: var(--text-sm); color: var(--kv-text-secondary); }
.proof-text strong { color: var(--kv-text); }

/* Hero visual — card 3D */
.hero-visual-wrap {
  position: relative;
}
.hero-course-card {
  background: var(--kv-bg);
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transform: perspective(1000px) rotateY(-6deg) rotateX(3deg);
  transition: transform 0.5s ease, box-shadow 0.5s ease;
}
.hero-course-card:hover {
  transform: perspective(1000px) rotateY(-1deg) rotateX(0deg);
  box-shadow: 0 24px 64px rgba(0, 85, 184, 0.18);
}

/* Floating cards en el hero */
.hero-float-card {
  position: absolute;
  background: var(--kv-bg);
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  animation: float-y 6s ease-in-out infinite;
}
@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
.hero-float-card.fc-top   { top: -16px; right: -24px; animation-duration: 7s; }
.hero-float-card.fc-bottom{ bottom: -12px; left: -24px; animation-duration: 5.5s; animation-delay: 1s; }
.fc-dot { width: 8px; height: 8px; border-radius: 50%; }
.fc-dot.blue   { background: var(--kv-blue); }
.fc-dot.green  { background: var(--kv-success); }
.fc-dot.orange { background: var(--kv-orange); }

/* ===================== CATÁLOGO ===================== */
.catalog-section {
  padding: var(--space-12) 0;
  background: var(--kv-bg-soft);
}

.catalog-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* Barra de filtros */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--kv-bg);
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--kv-border);
}

.filter-group-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--kv-text-muted);
  flex-shrink: 0;
}

.filter-pills {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  flex: 1;
}

.filter-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.4rem 0.875rem;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--kv-border);
  background: var(--kv-bg);
  color: var(--kv-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
  font-family: var(--font-body);
}
.filter-pill:hover {
  border-color: var(--kv-blue);
  color: var(--kv-blue);
  background: var(--kv-blue-50);
}
.filter-pill.active {
  background: var(--kv-blue);
  color: #fff;
  border-color: var(--kv-blue);
  box-shadow: 0 4px 12px rgba(0, 85, 184, 0.2);
}
.filter-pill-count {
  background: rgba(255,255,255,0.25);
  border-radius: var(--radius-full);
  padding: 0.05rem 0.35rem;
  font-size: 0.65rem;
}
.filter-pill:not(.active) .filter-pill-count {
  background: var(--kv-bg-muted);
  color: var(--kv-text-muted);
}

.sort-select {
  padding: 0.45rem 0.875rem;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--kv-border);
  background: var(--kv-bg);
  color: var(--kv-text);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}
.sort-select:focus { border-color: var(--kv-blue); }

.results-count {
  font-size: var(--text-sm);
  color: var(--kv-text-muted);
  margin-bottom: var(--space-5);
}
.results-count strong { color: var(--kv-text); }

/* ===================== COURSE CARD ===================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

.courses-grid.view-list {
  grid-template-columns: 1fr;
}
.courses-grid.view-list .course-card {
  flex-direction: row;
  max-height: 160px;
}
.courses-grid.view-list .course-thumb {
  width: 240px;
  flex-shrink: 0;
  aspect-ratio: unset;
}

.course-card {
  background: var(--kv-bg);
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
}
.course-card:hover {
  border-color: var(--kv-blue);
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

/* Thumbnail */
.course-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--kv-blue-50), var(--kv-blue-100));
  overflow: hidden;
}
.course-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.course-card:hover .course-thumb img { transform: scale(1.05); }

/* Overlay de play */
.course-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 85, 184, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.course-card:hover .course-play-overlay { opacity: 1; }
.course-play-btn {
  width: 52px; height: 52px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--kv-blue);
  transform: scale(0.85);
  transition: transform var(--transition-bounce);
}
.course-card:hover .course-play-btn { transform: scale(1); }

/* Badges sobre el thumbnail */
.course-thumb-badges {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  display: flex;
  gap: var(--space-1);
}
.course-level-badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}
.level-basico      { color: var(--kv-success); }
.level-intermedio  { color: var(--kv-warning); }
.level-avanzado    { color: var(--kv-danger); }
.level-master      { color: #7C3AED; }

/* Cuerpo de la card */
.course-body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-category {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--kv-blue);
  margin-bottom: var(--space-1);
}

.course-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--kv-text);
  line-height: 1.35;
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-instructor {
  font-size: var(--text-sm);
  color: var(--kv-text-muted);
  margin-bottom: var(--space-3);
}
.course-instructor a { color: var(--kv-blue); text-decoration: none; font-weight: 500; }

/* Meta info */
.course-meta {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}
.course-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--kv-text-muted);
}

/* Rating */
.course-rating {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.stars-row {
  display: flex;
  gap: 1px;
  color: #F59E0B;
  font-size: 0.7rem;
}
.rating-value  { font-size: var(--text-sm); font-weight: 700; color: #B45309; }
.rating-count  { font-size: var(--text-sm); color: var(--kv-text-muted); }

/* Footer con precio */
.course-footer {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--kv-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.course-price-wrap {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.price-current {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--kv-text);
  letter-spacing: -0.02em;
}
.price-original {
  font-size: var(--text-sm);
  color: var(--kv-text-muted);
  text-decoration: line-through;
}
.price-savings {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--kv-success);
  background: var(--kv-success-bg);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
}

.add-to-cart-btn {
  width: 34px; height: 34px;
  background: var(--kv-orange);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-bounce);
  flex-shrink: 0;
}
.add-to-cart-btn:hover { transform: scale(1.12) rotate(5deg); }
.add-to-cart-btn.added {
  background: var(--kv-success);
  animation: pop 0.3s var(--transition-bounce);
}
@keyframes pop { 0%,100%{transform:scale(1)} 50%{transform:scale(1.2)} }

/* ===================== DETALLE DE CURSO ===================== */
.course-detail-layout {
  padding-top: calc(var(--nav-height) + var(--space-10));
  padding-bottom: var(--space-16);
}

.course-detail-hero {
  background: linear-gradient(135deg, #0A192F 0%, #0055B8 100%);
  color: #fff;
  padding: var(--space-12) 0;
  margin-top: 0;
}
.course-detail-hero .course-category { color: var(--kv-orange-light); }
.course-detail-hero .course-title { color: #fff; font-size: var(--text-3xl); -webkit-line-clamp: unset; }
.course-detail-hero .course-instructor a { color: rgba(255,255,255,0.8); }
.course-detail-hero .rating-count { color: rgba(255,255,255,0.6); }
.course-detail-hero .stars-row { font-size: 0.85rem; }

.course-detail-body {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-10);
  align-items: start;
  padding-top: var(--space-10);
}

/* Sidebar sticky con precio */
.course-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-4));
  background: var(--kv-bg);
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.sidebar-thumbnail {
  position: relative;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--kv-blue-50), var(--kv-blue-100));
  cursor: pointer;
  overflow: hidden;
}
.sidebar-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 85, 184, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sidebar-play-btn {
  width: 56px; height: 56px;
  background: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--kv-blue);
  box-shadow: var(--shadow-lg);
}
.sidebar-preview-text {
  position: absolute;
  bottom: var(--space-3);
  left: 0; right: 0;
  text-align: center;
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.sidebar-body { padding: var(--space-5); }

.sidebar-price-block {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}
.sidebar-price-current { font-size: var(--text-4xl); font-weight: 800; letter-spacing: -0.03em; }
.sidebar-price-original { font-size: var(--text-lg); color: var(--kv-text-muted); text-decoration: line-through; }
.sidebar-price-badge { font-size: var(--text-sm); font-weight: 700; color: #fff; background: var(--kv-orange); padding: 0.25rem 0.625rem; border-radius: var(--radius-sm); }

.sidebar-urgency {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--kv-orange-50);
  border: 1px solid rgba(255,115,0,0.2);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  color: var(--kv-orange-dark);
}

.course-includes {
  list-style: none;
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--kv-border);
}
.course-includes li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--kv-text-secondary);
}
.course-includes li .icon { color: var(--kv-blue); width: 16px; flex-shrink: 0; }

/* Curriculum Accordion */
.curriculum-section { margin-top: var(--space-8); }
.curriculum-section h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-5);
}

.module-accordion {
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-3);
}

.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--kv-bg-soft);
  cursor: pointer;
  transition: background var(--transition-fast);
  user-select: none;
}
.module-header:hover { background: var(--kv-blue-50); }
.module-header-left { display: flex; align-items: center; gap: var(--space-3); }
.module-header-icon { font-size: 1rem; }
.module-title { font-size: var(--text-base); font-weight: 600; }
.module-meta { font-size: var(--text-sm); color: var(--kv-text-muted); }
.module-chevron {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--kv-bg);
  border: 1.5px solid var(--kv-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: var(--kv-text-muted);
  transition: transform var(--transition-base), background var(--transition-fast);
  flex-shrink: 0;
}
.module-accordion.open .module-chevron { transform: rotate(180deg); background: var(--kv-blue); color: #fff; border-color: var(--kv-blue); }

.module-lessons {
  display: none;
  background: var(--kv-bg);
}
.module-accordion.open .module-lessons { display: block; }

.lesson-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--kv-border);
  transition: background var(--transition-fast);
}
.lesson-item:hover { background: var(--kv-bg-soft); }
.lesson-icon { font-size: 0.85rem; color: var(--kv-text-muted); width: 18px; flex-shrink: 0; }
.lesson-title { font-size: var(--text-sm); color: var(--kv-text); flex: 1; }
.lesson-duration { font-size: var(--text-sm); color: var(--kv-text-muted); }
.lesson-free-badge {
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--kv-success);
  background: var(--kv-success-bg);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
}
.lesson-lock { color: var(--kv-text-disabled); font-size: 0.75rem; }

/* ===================== CARRITO ===================== */
.cart-page { padding-top: calc(var(--nav-height) + var(--space-8)); padding-bottom: var(--space-16); }

.cart-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-8);
  align-items: start;
}

.cart-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}
.cart-count { color: var(--kv-text-muted); font-size: var(--text-xl); font-weight: 400; }

.cart-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--kv-border);
  align-items: flex-start;
}
.cart-item-thumb {
  width: 120px;
  aspect-ratio: 16/9;
  border-radius: var(--radius-md);
  background: var(--kv-blue-50);
  overflow: hidden;
  flex-shrink: 0;
}
.cart-item-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cart-item-info { flex: 1; min-width: 0; }
.cart-item-title { font-size: var(--text-base); font-weight: 600; margin-bottom: var(--space-1); }
.cart-item-instructor { font-size: var(--text-sm); color: var(--kv-text-muted); margin-bottom: var(--space-2); }
.cart-item-badges { display: flex; gap: var(--space-2); margin-bottom: var(--space-3); }
.cart-item-price { font-size: var(--text-xl); font-weight: 800; }
.cart-remove-btn {
  background: none;
  border: none;
  color: var(--kv-danger);
  font-size: var(--text-sm);
  cursor: pointer;
  padding: var(--space-1) 0;
  font-family: var(--font-body);
  text-decoration: underline;
  transition: opacity var(--transition-fast);
}
.cart-remove-btn:hover { opacity: 0.7; }

/* Order summary */
.order-summary {
  background: var(--kv-bg);
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-4));
}
.order-summary-title { font-size: var(--text-xl); font-weight: 800; margin-bottom: var(--space-6); }
.order-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
}
.order-line.border-top {
  border-top: 2px solid var(--kv-text);
  margin-top: var(--space-3);
  padding-top: var(--space-4);
}
.order-line.total-line .label { font-size: var(--text-lg); font-weight: 800; }
.order-line.total-line .value { font-size: var(--text-2xl); font-weight: 800; }
.order-line.discount-line .value { color: var(--kv-success); }

/* Cupón */
.coupon-form {
  display: flex;
  gap: var(--space-2);
  margin: var(--space-5) 0;
}
.coupon-input {
  flex: 1;
  padding: 0.65rem 1rem;
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  outline: none;
  transition: border-color var(--transition-fast);
}
.coupon-input:focus { border-color: var(--kv-blue); }
.coupon-apply-btn {
  padding: 0.65rem 1.125rem;
  background: var(--kv-bg-muted);
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
  color: var(--kv-text);
  transition: var(--transition-fast);
}
.coupon-apply-btn:hover { border-color: var(--kv-blue); color: var(--kv-blue); }

/* Paypal button */
.paypal-btn {
  width: 100%;
  padding: 1rem;
  background: #0070BA;
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-md);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  transition: var(--transition-base);
}
.paypal-btn:hover { background: #005EA6; transform: translateY(-1px); }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1024px) {
  .store-hero-inner { grid-template-columns: 1fr; gap: var(--space-8); text-align: center; }
  .hero-description { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-social-proof { justify-content: center; }
  .hero-visual-wrap { max-width: 500px; margin: 0 auto; }
  .course-detail-body { grid-template-columns: 1fr; }
  .course-sidebar { position: static; }
}

@media (max-width: 768px) {
  .store-hero { padding: calc(var(--nav-height) + 2rem) 0 3rem; }
  .hero-float-card { display: none; }
  .courses-grid { grid-template-columns: 1fr 1fr; gap: var(--space-3); }
  .cart-layout { grid-template-columns: 1fr; }
  .cart-item-thumb { width: 80px; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .filter-bar { padding: var(--space-3); }
}

@media (max-width: 480px) {
  .courses-grid { grid-template-columns: 1fr; }
  .hero-headline { font-size: var(--text-2xl); }
}

/* ============================================================
   COMPATIBILIDAD — Estilos para clases .st-* usadas por store.js
   Estos estilos aplican el nuevo diseño a las tarjetas y
   componentes renderizados dinámicamente por Store.js
   ============================================================ */

/* Store page wrapper */
.store-page {
  font-family: var(--font-body);
  color: var(--kv-text);
  background: var(--kv-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}
.store-page *, .store-page *::before, .store-page *::after { box-sizing: border-box; }
.store-page img { max-width: 100%; display: block; }

/* Container */
.st-container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-6); }

/* === HEADER (legacy compat) === */
.st-header {
  position: sticky; top: 0; z-index: 200;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--kv-border);
  padding: 0 2rem; height: 64px;
  display: flex; align-items: center; gap: 1.5rem;
}
.st-header-logo {
  font-size: 1.25rem; font-weight: 800; color: var(--kv-blue);
  text-decoration: none; letter-spacing: -0.5px; flex-shrink: 0;
}
.st-header-logo span { color: var(--kv-orange); }
.st-header-nav { display: flex; gap: 1.5rem; margin-left: 2rem; }
.st-header-nav a {
  font-size: 0.875rem; font-weight: 500; color: var(--kv-text-secondary);
  text-decoration: none; transition: color var(--transition-fast);
}
.st-header-nav a:hover, .st-header-nav a.active { color: var(--kv-blue); }
.st-header-actions { margin-left: auto; display: flex; align-items: center; gap: 0.75rem; }
.st-btn-profile, .st-btn-outline {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.45rem 1rem; border-radius: var(--radius-md);
  font-size: 0.82rem; font-weight: 600; text-decoration: none;
  transition: all var(--transition-fast);
}
.st-btn-profile { color: var(--kv-text-secondary); border: 1px solid var(--kv-border); background: var(--kv-bg); }
.st-btn-profile:hover { border-color: var(--kv-blue); color: var(--kv-blue); }
.st-btn-outline { color: var(--kv-blue); border: 1.5px solid var(--kv-blue); background: transparent; }
.st-btn-outline:hover { background: var(--kv-blue-50); }

/* === HERO (legacy) === */
.st-hero {
  text-align: center;
  padding: 3rem 2rem 2rem;
  background: var(--kv-bg-soft);
}
.st-hero h1 {
  font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 800;
  letter-spacing: -0.03em; color: var(--kv-text); margin-bottom: 1.5rem;
}
.st-hero-search {
  display: flex; max-width: 600px; margin: 0 auto 1rem;
  border: 1.5px solid var(--kv-border); border-radius: var(--radius-full);
  overflow: hidden; background: var(--kv-bg);
  transition: border-color var(--transition-fast);
}
.st-hero-search:focus-within { border-color: var(--kv-blue); box-shadow: 0 0 0 3px rgba(0,85,184,0.08); }
.st-hero-search input {
  flex: 1; padding: 0.75rem 1.25rem; border: none; outline: none;
  font-family: var(--font-body); font-size: 0.95rem; color: var(--kv-text); background: transparent;
}
.st-hero-search input::placeholder { color: var(--kv-text-muted); }
.st-hero-search button {
  padding: 0.75rem 1.5rem; background: var(--kv-orange); color: #fff;
  border: none; font-weight: 600; font-size: 0.88rem; cursor: pointer;
  font-family: var(--font-body); transition: background var(--transition-fast);
}
.st-hero-search button:hover { background: var(--kv-orange-dark); }
.st-hero-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; margin-top: 0.5rem; }
.st-hero-tag {
  padding: 0.3rem 0.8rem; border-radius: var(--radius-full);
  border: 1.5px solid var(--kv-border); font-size: 0.78rem; font-weight: 500;
  color: var(--kv-text-secondary); text-decoration: none; transition: all var(--transition-fast);
}
.st-hero-tag:hover { border-color: var(--kv-blue); color: var(--kv-blue); background: var(--kv-blue-50); }

/* === SECTIONS === */
.st-section { padding: 2.5rem 0; }
.st-section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.st-section-title { font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; color: var(--kv-text); }
.st-section-link { font-size: 0.82rem; font-weight: 600; color: var(--kv-blue); text-decoration: none; }

/* === COURSE GRID (.st-grid) === */
.st-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

/* === COURSE CARD (.st-card) === */
.st-card {
  background: var(--kv-bg);
  border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
}
.st-card:hover {
  border-color: var(--kv-blue);
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.st-card-badge {
  position: absolute; top: var(--space-3); left: var(--space-3);
  z-index: 2;
  background: var(--kv-blue); color: #fff;
  font-size: 0.65rem; font-weight: 700; text-transform: uppercase;
  padding: 0.2rem 0.5rem; border-radius: var(--radius-sm);
}
.st-card-badge.discount { background: var(--kv-orange); }

.st-card-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--kv-blue-50), var(--kv-blue-100));
  overflow: hidden;
}
.st-card-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}
.st-card:hover .st-card-thumb img { transform: scale(1.05); }
.st-card-thumb .thumb-placeholder {
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%; color: var(--kv-blue); opacity: 0.3; font-size: 2rem;
}
.st-card-progress { height: 3px; background: transparent; position: absolute; bottom: 0; left: 0; right: 0; }

.st-card-body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.st-card-cat {
  font-size: 0.65rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--kv-blue); margin-bottom: var(--space-1);
}

.st-card-title {
  font-size: var(--text-base); font-weight: 700;
  color: var(--kv-text); line-height: 1.35;
  margin-bottom: var(--space-2);
  display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}

.st-card-meta {
  display: flex; gap: var(--space-3); margin-bottom: var(--space-3);
  font-size: var(--text-sm); color: var(--kv-text-muted); flex-wrap: wrap;
}
.st-card-meta span { display: flex; align-items: center; gap: 0.25rem; }

.st-card-footer {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--kv-border);
  display: flex; align-items: center;
  justify-content: space-between;
}

.st-card-price {
  font-size: var(--text-xl); font-weight: 800;
  color: var(--kv-text); letter-spacing: -0.02em;
}
.st-card-price-compare {
  font-size: var(--text-sm); color: var(--kv-text-muted);
  text-decoration: line-through; margin-left: var(--space-2);
}
.st-card-price-free {
  font-size: var(--text-lg); font-weight: 700; color: var(--kv-success);
}
.st-card-cta {
  font-size: var(--text-sm); font-weight: 600; color: var(--kv-orange);
  transition: color var(--transition-fast);
}
.st-card:hover .st-card-cta { color: var(--kv-orange-dark); }

/* Level badges */
.st-level {
  font-size: 0.65rem; font-weight: 700; text-transform: uppercase;
  padding: 0.15rem 0.4rem; border-radius: var(--radius-sm);
}
.st-level-basico { background: var(--kv-success-bg); color: var(--kv-success); }
.st-level-intermedio { background: var(--kv-warning-bg); color: var(--kv-warning); }
.st-level-avanzado { background: var(--kv-danger-bg); color: var(--kv-danger); }
.st-level-master { background: #F5F3FF; color: #7C3AED; }

/* === FILTERS SIDEBAR === */
.st-catalog-layout { display: grid; grid-template-columns: 220px 1fr; gap: 2rem; }
.st-filters { position: sticky; top: 80px; }
.st-filters-title { font-size: 0.9rem; font-weight: 700; margin-bottom: 1rem; color: var(--kv-text); }
.st-filter-group { margin-bottom: 1rem; }
.st-filter-header {
  width: 100%; text-align: left; padding: 0.5rem 0; border: none; background: none;
  font-family: var(--font-body); font-size: 0.82rem; font-weight: 600;
  color: var(--kv-text); cursor: pointer; display: flex; align-items: center;
  justify-content: space-between;
}
.st-filter-options { display: none; padding: 0.25rem 0; }
.st-filter-options.open { display: block; }
.st-filter-option {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.3rem 0; font-size: 0.82rem; color: var(--kv-text-secondary);
  cursor: pointer; transition: color var(--transition-fast);
}
.st-filter-option:hover { color: var(--kv-blue); }
.st-filter-option input { accent-color: var(--kv-blue); }
.st-filter-count { font-size: 0.72rem; color: var(--kv-text-muted); margin-left: auto; }
.st-grid-count { font-size: 0.85rem; color: var(--kv-text-muted); }

/* === CAROUSEL === */
.st-carousel {
  display: flex; gap: var(--space-5); overflow-x: auto;
  scroll-snap-type: x mandatory; scroll-behavior: smooth;
  padding-bottom: 0.5rem;
  -ms-overflow-style: none; scrollbar-width: none;
}
.st-carousel::-webkit-scrollbar { display: none; }
.st-carousel .st-card { min-width: 280px; scroll-snap-align: start; flex-shrink: 0; }

/* === SOCIAL PROOF === */
.st-proof {
  padding: 2rem 0; background: var(--kv-bg-soft);
  border-top: 1px solid var(--kv-border); border-bottom: 1px solid var(--kv-border);
}
.st-proof-title { text-align: center; font-size: 0.82rem; color: var(--kv-text-muted); margin-bottom: 1rem; }
.st-proof-logos {
  display: flex; justify-content: center; gap: 3rem; flex-wrap: wrap;
  margin-bottom: 2rem;
}
.st-proof-logos span { font-size: 1.1rem; font-weight: 700; color: var(--kv-text-muted); opacity: 0.4; }
.st-testimonials { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.st-testimonial {
  background: var(--kv-bg); border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-lg); padding: 1.5rem;
}
.st-testimonial p { font-size: 0.88rem; color: var(--kv-text-secondary); line-height: 1.6; margin-bottom: 1rem; font-style: italic; }
.st-testimonial-author { font-weight: 700; font-size: 0.85rem; color: var(--kv-text); }
.st-testimonial-role { font-size: 0.78rem; color: var(--kv-text-muted); }

/* === VALUE PROPOSITION === */
.st-value {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem;
  padding: 3rem 0; border-bottom: 1px solid var(--kv-border);
}
.st-value-item { text-align: center; }
.st-value-icon {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--kv-blue-50); color: var(--kv-blue);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 0.75rem;
}
.st-value-icon svg { width: 20px; height: 20px; }
.st-value-item h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.35rem; color: var(--kv-text); }
.st-value-item p { font-size: 0.82rem; color: var(--kv-text-secondary); line-height: 1.5; }

/* === BUNDLES === */
.st-bundles { background: var(--kv-bg-soft); padding: 2.5rem 0; }

/* === COURSE DETAIL (renderizado por store.js) === */

/* Hero gradient en la parte superior del detalle */
.st-course-wrap {
  position: relative;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 2rem;
  min-height: 50vh;
}
.st-course-wrap::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 340px;
  background: linear-gradient(135deg, #0A192F 0%, var(--kv-blue) 100%);
  z-index: -1;
  pointer-events: none;
}
.st-course-wrap h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: var(--space-3);
  line-height: 1.2;
}
.st-course-wrap .st-course-stats {
  margin-bottom: var(--space-6);
}
.st-course-wrap .st-course-stat {
  color: rgba(248,250,252,0.7);
}
.st-course-wrap .st-course-stat svg { stroke: rgba(248,250,252,0.7); }
.st-course-wrap .st-course-breadcrumb {
  color: rgba(248,250,252,0.5);
  padding-top: var(--space-4);
}
.st-course-wrap .st-course-breadcrumb a {
  color: rgba(248,250,252,0.7);
}
.st-course-wrap .st-course-breadcrumb a:hover {
  color: #fff;
}

/* Sticky bottom CTA bar */
.st-sticky-cta {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--kv-bg);
  border-top: 1.5px solid var(--kv-border);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-6);
  z-index: 100;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.st-sticky-cta.visible {
  transform: translateY(0);
}
.st-sticky-price {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--kv-text);
}

.st-course-layout { display: grid; grid-template-columns: 1fr 380px; gap: 2rem; align-items: start; padding: 2rem 0; }
.st-course-content { min-width: 0; }
.st-course-breadcrumb { font-size: 0.82rem; color: var(--kv-text-muted); margin-bottom: 1rem; }
.st-course-breadcrumb a { color: var(--kv-blue); text-decoration: none; }
.st-course-desc { font-size: 0.92rem; color: var(--kv-text-secondary); line-height: 1.7; margin-bottom: 1.5rem; }
.st-course-stats { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.5rem; }
.st-course-stat {
  display: flex; align-items: center; gap: 0.35rem;
  font-size: 0.82rem; color: var(--kv-text-muted);
}

/* Syllabus accordion */
.st-syllabus { margin-bottom: 2rem; }
.st-syllabus-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.5rem; }
.st-syllabus-info { font-size: 0.82rem; color: var(--kv-text-muted); margin-bottom: 1rem; }
.st-accordion-item {
  border: 1.5px solid var(--kv-border); border-radius: var(--radius-lg);
  overflow: hidden; margin-bottom: var(--space-3);
}
.st-accordion-header {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-4) var(--space-5); background: var(--kv-bg-soft);
  border: none; cursor: pointer; font-family: var(--font-body);
  font-size: 0.9rem; font-weight: 600; color: var(--kv-text);
  transition: background var(--transition-fast);
}
.st-accordion-header:hover { background: var(--kv-blue-50); }
.st-accordion-body { display: none; background: var(--kv-bg); }
.st-accordion-body.open { display: block; }
.st-lesson-row {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) var(--space-5); border-top: 1px solid var(--kv-border);
  font-size: var(--text-sm);
}
.st-lesson-row:hover { background: var(--kv-bg-soft); }
.st-lesson-title { flex: 1; color: var(--kv-text); }
.st-lesson-duration { color: var(--kv-text-muted); font-family: var(--font-mono); font-size: 0.78rem; }
.st-lesson-lock { color: var(--kv-text-disabled); }

/* Purchase sidebar */
.st-purchase {
  position: sticky; top: 80px;
  background: var(--kv-bg); border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-xl); overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.st-purchase-thumb {
  position: relative; aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--kv-blue-50), var(--kv-blue-100));
  overflow: hidden; cursor: pointer;
}
.st-purchase-thumb img { width: 100%; height: 100%; object-fit: cover; }
.st-purchase-play {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,85,184,0.3); color: #fff; font-size: 2rem;
}
.st-purchase-body { padding: var(--space-5); }
.st-purchase-pricebox { margin-bottom: var(--space-4); }
.st-purchase-price { font-size: var(--text-3xl); font-weight: 800; letter-spacing: -0.02em; }
.st-purchase-compare { font-size: var(--text-lg); color: var(--kv-text-muted); text-decoration: line-through; margin-right: var(--space-2); }
.st-purchase-currency { font-size: var(--text-sm); color: var(--kv-text-muted); margin-left: var(--space-1); }
.st-purchase-discount {
  display: inline-block; font-size: 0.75rem; font-weight: 700;
  color: var(--kv-success); background: var(--kv-success-bg);
  padding: 0.15rem 0.5rem; border-radius: var(--radius-sm);
}
.st-purchase-meta {
  list-style: none; padding: 0; margin-top: var(--space-4);
  border-top: 1px solid var(--kv-border); padding-top: var(--space-4);
}
.st-purchase-meta li {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) 0; font-size: var(--text-sm); color: var(--kv-text-secondary);
}

.st-btn-cart {
  display: flex; align-items: center; justify-content: center;
  width: 100%; padding: 0.85rem; background: var(--kv-orange); color: #fff;
  border: none; border-radius: var(--radius-md); font-size: 0.95rem;
  font-weight: 700; cursor: pointer; font-family: var(--font-body);
  transition: all var(--transition-base); text-decoration: none;
}
.st-btn-cart:hover { background: var(--kv-orange-dark); transform: translateY(-1px); box-shadow: var(--shadow-orange); }
.st-add-cart-btn { cursor: pointer; }

/* Coupon */
.st-coupon {
  display: flex; gap: var(--space-2); margin: var(--space-3) 0;
}
.st-coupon input {
  flex: 1; padding: 0.55rem 0.75rem;
  border: 1.5px solid var(--kv-border); border-radius: var(--radius-md);
  font-family: var(--font-mono); font-size: var(--text-sm);
  text-transform: uppercase; outline: none;
}
.st-coupon input:focus { border-color: var(--kv-blue); }
.st-coupon button {
  padding: 0.55rem 1rem; background: var(--kv-bg-muted);
  border: 1.5px solid var(--kv-border); border-radius: var(--radius-md);
  font-size: var(--text-sm); font-weight: 600; cursor: pointer;
  font-family: var(--font-body); color: var(--kv-text);
}
.st-coupon button:hover { border-color: var(--kv-blue); color: var(--kv-blue); }

/* === CART PAGE (.st-cart-*) === */
.st-cart-layout { display: grid; grid-template-columns: 1fr 360px; gap: 2rem; align-items: start; padding: 2rem 0; }
.st-cart-header h2 { font-size: 1.35rem; font-weight: 800; margin-bottom: 1rem; }
.st-cart-count { color: var(--kv-text-muted); font-weight: 400; }
.st-cart-item {
  display: flex; gap: var(--space-4); padding: var(--space-5) 0;
  border-bottom: 1px solid var(--kv-border); align-items: flex-start;
}
.st-cart-item-thumb {
  width: 120px; aspect-ratio: 16/9; border-radius: var(--radius-md);
  background: var(--kv-blue-50); overflow: hidden; flex-shrink: 0;
}
.st-cart-item-thumb img { width: 100%; height: 100%; object-fit: cover; }
.st-cart-item-info { flex: 1; min-width: 0; }
.st-cart-item-title {
  font-size: var(--text-base); font-weight: 600; color: var(--kv-text);
  text-decoration: none; display: block; margin-bottom: var(--space-1);
}
.st-cart-item-title:hover { color: var(--kv-blue); }
.st-cart-item-meta { font-size: var(--text-sm); color: var(--kv-text-muted); display: flex; gap: var(--space-2); }
.st-cart-item-price { text-align: right; }
.st-cart-price { font-size: var(--text-xl); font-weight: 800; }
.st-cart-compare { font-size: var(--text-sm); color: var(--kv-text-muted); text-decoration: line-through; display: block; }
.st-cart-remove {
  background: none; border: none; color: var(--kv-danger);
  font-size: 1.2rem; cursor: pointer; padding: 0.25rem;
  transition: opacity var(--transition-fast);
}
.st-cart-remove:hover { opacity: 0.7; }

.st-cart-summary {
  background: var(--kv-bg); border: 1.5px solid var(--kv-border);
  border-radius: var(--radius-xl); padding: var(--space-6);
  position: sticky; top: 80px;
}
.st-cart-savings {
  background: var(--kv-success-bg); color: var(--kv-success);
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-md);
  font-size: var(--text-sm); font-weight: 600; text-align: center;
  margin-bottom: var(--space-4);
}
.st-cart-line {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-2) 0; font-size: 0.9rem;
}
.st-cart-line.total {
  border-top: 2px solid var(--kv-text); margin-top: var(--space-3);
  padding-top: var(--space-3); font-size: 1.1rem; font-weight: 800;
}

/* Mini cart badge */
.st-mini-cart-btn {
  position: relative; display: flex; align-items: center; gap: 0.35rem;
  padding: 0.45rem 1rem; border-radius: var(--radius-md);
  font-size: 0.82rem; font-weight: 600; text-decoration: none;
  color: var(--kv-text-secondary); border: 1px solid var(--kv-border); background: var(--kv-bg);
}
.st-mini-cart-btn:hover { border-color: var(--kv-blue); color: var(--kv-blue); }
.st-mini-cart-badge {
  position: absolute; top: -6px; right: -6px;
  width: 18px; height: 18px; background: var(--kv-orange); color: #fff;
  border-radius: 50%; font-size: 0.6rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid #fff;
}

/* Skeleton */
.st-skeleton {
  background: linear-gradient(90deg, var(--kv-bg-muted) 25%, var(--kv-border) 50%, var(--kv-bg-muted) 75%);
  background-size: 200% 100%;
  animation: skeletonPulse 1.8s ease-in-out infinite;
  border-radius: 4px;
}

/* === FOOTER (legacy) === */
.st-footer {
  margin-top: auto;
  padding: 1.5rem 0;
  border-top: 1px solid var(--kv-border);
  font-size: 0.82rem;
  color: var(--kv-text-muted);
}

/* === RESPONSIVE (compat) === */
@media (max-width: 1024px) {
  .st-course-layout { grid-template-columns: 1fr; }
  .st-purchase { position: static; }
  .st-course-wrap::before { height: 280px; }
}
@media (max-width: 768px) {
  .st-header { padding: 0 1rem; }
  .st-header-nav { display: none; }
  .st-catalog-layout { grid-template-columns: 1fr; }
  .st-filters { display: none; }
  .st-grid { grid-template-columns: 1fr 1fr; gap: var(--space-3); }
  .st-value { grid-template-columns: 1fr; gap: 1rem; }
  .st-cart-layout { grid-template-columns: 1fr; }
  .st-cart-item-thumb { width: 80px; }
  .st-hero-search { max-width: 100%; }
  .st-course-wrap { padding: 0 1rem; }
  .st-course-wrap::before { height: 240px; }
  .st-course-wrap h1 { font-size: var(--text-2xl); }
}
@media (max-width: 480px) {
  .st-grid { grid-template-columns: 1fr; }
  .st-course-wrap::before { height: 200px; }
}

/* ============================================================
   PHASE 7 — Premium Card & Conversion Enhancements
   ============================================================ */

/* Enhanced card with depth and hover animation */
.st-card {
    display: flex;
    flex-direction: column;
    background: var(--kv-bg);
    border: 1px solid var(--kv-border);
    border-radius: var(--radius-xl, 16px);
    overflow: hidden;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.25s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    position: relative;
}
.st-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 85, 184, 0.12), 0 8px 16px rgba(0, 85, 184, 0.06);
    border-color: var(--kv-blue-100);
}
.st-card:active {
    transform: translateY(-2px);
    transition-duration: 0.1s;
}

/* Thumbnail */
.st-card-thumb {
    position: relative;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--kv-blue-50, #EBF5FF), var(--kv-bg-muted, #f1f5f9));
    overflow: hidden;
}
.st-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.st-card:hover .st-card-thumb img {
    transform: scale(1.06);
}

/* Card body */
.st-card-body {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.st-card-cat {
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--kv-blue);
    margin-bottom: 0.35rem;
}
.st-card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--kv-text);
    line-height: 1.35;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.st-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 0.75rem;
    color: var(--kv-text-muted);
}
.st-card-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

/* Price footer */
.st-card-footer {
    margin-top: auto;
    padding-top: 0.875rem;
    border-top: 1px solid var(--kv-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.st-card-price {
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--kv-text);
    letter-spacing: -0.02em;
}
.st-card-price-compare {
    font-size: 0.78rem;
    color: var(--kv-text-muted);
    text-decoration: line-through;
}
.st-card-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--kv-blue);
    transition: gap 0.25s ease;
}
.st-card:hover .st-card-cta {
    gap: 0.5rem;
}

/* Level indicator chips */
.st-level {
    padding: 0.125rem 0.4rem;
    border-radius: var(--radius-sm, 6px);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}
.st-level-basico     { background: var(--kv-success-bg, #f0fdf4); color: var(--kv-success, #16a34a); }
.st-level-intermedio { background: var(--kv-warning-bg, #fffbeb); color: var(--kv-warning, #d97706); }
.st-level-avanzado   { background: var(--kv-danger-bg, #fef2f2);  color: var(--kv-danger, #dc2626); }

.st-card-skeleton {
    pointer-events: none;
}
.st-card-skeleton .st-card-thumb {
    background: var(--skeleton-base);
}

.st-empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
}

/* Badge system */
.st-card-badge {
    position: absolute;
    top: 0.75rem;
    z-index: 3;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-full, 99px);
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.st-badge-new {
    left: 0.75rem;
    background: rgba(0, 85, 184, 0.9);
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}
.st-badge-dot {
    width: 5px;
    height: 5px;
    background: #fff;
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.st-badge-discount {
    right: 0.75rem;
    left: auto;
    background: rgba(220, 38, 38, 0.9);
    color: #fff;
}

/* Thumbnail hover overlay */
.st-card-hover-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 85, 184, 0.6);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}
.st-card:hover .st-card-hover-overlay {
    opacity: 1;
}
.st-card-hover-play {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--kv-blue, #0055B8);
    transform: scale(0.8);
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}
.st-card:hover .st-card-hover-play {
    transform: scale(1);
}
.st-card-hover-text {
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
}

/* Card social proof */
.st-card-social {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.72rem;
    color: var(--kv-text-muted);
    margin-bottom: 0.5rem;
}

/* Price footer */
.st-card-price-wrap {
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
}
.st-card-price-free {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--kv-success, #16a34a);
    background: var(--kv-success-bg, #f0fdf4);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full, 99px);
}

/* ============================================================
   PHASE 14 — Store Mobile Responsive
   ============================================================ */

@media (max-width: 1024px) {
    .store-hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    .hero-description { max-width: 100%; margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .hero-social-proof { justify-content: center; }
    .hero-visual-wrap { display: none; }
    .st-hero-search { max-width: 500px; margin: 0 auto 1rem; }
    .st-catalog-layout {
        grid-template-columns: 1fr;
    }
    .st-sidebar-filters { display: none; }
    .st-course-layout {
        grid-template-columns: 1fr;
    }
    .st-purchase {
        position: relative;
        top: auto;
    }
}

@media (max-width: 640px) {
    .store-hero {
        padding-top: calc(var(--nav-height, 68px) + 2rem);
        padding-bottom: 3rem;
    }
    .hero-headline {
        font-size: 1.75rem;
    }
    .st-catalog-grid {
        grid-template-columns: 1fr;
    }
    .st-cart-layout {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   PHASE 18 — Public Navbar Enhancement
   ============================================================ */

.pub-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height, 68px);
    transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
    background: transparent;
}
.pub-navbar.scrolled {
    background: var(--glass-bg, rgba(255,255,255,0.85));
    backdrop-filter: var(--glass-blur, blur(12px));
    -webkit-backdrop-filter: var(--glass-blur, blur(12px));
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
    border-bottom: 1px solid var(--glass-border, rgba(0,0,0,0.06));
}

.pub-navbar-inner {
    max-width: var(--container-max, 1280px);
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.pub-navbar-link {
    padding: 0.5rem 0.875rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--kv-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md, 8px);
    transition: all 0.2s ease;
}
.pub-navbar-link:hover {
    color: var(--kv-text);
    background: var(--kv-bg-muted);
}
.pub-navbar-link.active {
    color: var(--kv-blue);
    font-weight: 600;
}

/* Cart icon in navbar */
.pub-navbar-cart {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--kv-text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}
.pub-navbar-cart:hover { color: var(--kv-text); }
.pub-navbar-cart-badge {
    position: absolute;
    top: 0;
    right: -2px;
    min-width: 16px;
    height: 16px;
    background: var(--kv-orange);
    color: #fff;
    border-radius: 50%;
    font-size: 0.55rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 3px;
}

/* Mobile navbar */
@media (max-width: 768px) {
    .pub-navbar-links { display: none; }
    .pub-navbar { background: var(--glass-bg, rgba(255,255,255,0.9)); backdrop-filter: var(--glass-blur, blur(12px)); }
}