/* RESET Y VARIABLES */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #007aff;
  --background-color: #ffffff;
  --surface-color: #f5f5f7;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --border-color: #d2d2d7;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --radius: 12px;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
    Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  -webkit-font-smoothing: antialiased;
}

/* UTILIDADES REUSABLES */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.btn {
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn:focus-visible {
  outline: 3px solid rgba(0, 122, 255, 0.25);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background-color: #0056cc;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--surface-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--border-color);
  transform: translateY(-1px);
}

/* HEADER */
.header {
  background-color: var(--background-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  font-size: 1.8rem;
}

.btn-filter {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.btn-filter:hover {
  background-color: #0056cc;
  transform: translateY(-1px);
}

/* MAIN */
.main {
  padding: 3rem 0;
  min-height: calc(100vh - 400px);
}

/* Grid de productos */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

/* Tarjeta producto */
.product-card {
  background: var(--background-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.product-image {
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, #f5f5f7 0%, #e8e8ed 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  position: relative;
  overflow: hidden;
}

.product-image img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

.product-info {
  padding: 1.5rem;
}

.product-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.product-details {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.product-color,
.product-storage {
  text-transform: capitalize;
}

.product-price {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1.3rem;
  margin-top: 0.5rem;
}

/* MENSAJE DE SUGERIDOS */
.suggested-message {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  background-color: var(--surface-color);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
}

.suggested-message h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.suggested-message p {
  color: var(--text-secondary);
}

/* MODAL */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  padding: 16px;
  overflow: auto;
}

.modal-content {
  background-color: var(--background-color);
  width: 100%;
  max-width: 500px;
  margin: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  animation: modalOpen 0.3s ease;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

@keyframes modalOpen {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  padding: 1.6rem 2rem 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.modal-body {
  padding: 1.2rem 2rem 1.2rem;
  overflow: auto;
}

.modal-footer {
  padding: 1rem 2rem 1.6rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.close {
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color 0.3s;
  user-select: none;
}

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

/* FORMULARIO */
.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group select,
.form-group input[type="range"] {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  background-color: var(--background-color);
  transition: border-color 0.3s;
}

.form-group select:focus,
.form-group input[type="range"]:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* FOOTER */
.footer {
  background-color: var(--surface-color);
  color: var(--text-primary);
  padding: 3rem 0 1.5rem;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-section p {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* soporte visual para listas semánticas */
.footer-section ul {
  padding-left: 0;
  margin: 0;
}

.footer-section li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  list-style: none;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
  }

  .header-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: 1.2rem;
    padding-right: 1.2rem;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }

  .product-image {
    height: 180px;
  }
}