:root {   
  --color-primario: #0d0d0d;
  --color-primario-suave: #1a1a1a;
  --fondo: #fafafa;
  --fondo-hover: #ffffff;
  --color-secundario: #c41e3a;
  --color-secundario-hover: #a01830;
  --color-secundario-suave: rgba(196, 30, 58, 0.12);
  --gris: #6b6b6b;
  --gris-claro: #e5e5e5;
  --sombra: 0 4px 20px rgba(0, 0, 0, 0.12);
  --sombra-hover: 0 8px 30px rgba(0, 0, 0, 0.18);
  --radio: 12px;
  --transicion: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--fondo);
  color: var(--color-primario);
  text-align: center;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.6; 
  margin: 0;
}

  /* HEADER */
header {
  background-color: var(--color-primario);
  color: var(--fondo);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--sombra);
  text-align: center;
}

header h1 {
  margin: 0 0 1rem 0;
  padding: 1rem 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
  justify-content: center;
}

header nav a {
  color: var(--fondo);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  transition: background-color var(--transicion), color var(--transicion);
}

header nav a:hover {
  background-color: var(--color-secundario);
  color: var(--fondo-hover);
}

/* ===== Main y contenedor ===== */
main,
body > p {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  padding: 2rem;
  text-align: center; 
}

body > p {
  font-size: 1.2rem;
  color: var(--gris);
  margin-bottom: 0;

}

/* ===== Secciones ===== */
section {
  margin-bottom: 3.5rem;
}

section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primario);
  margin: 0 0 1.25rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--color-secundario);
  display: inline-block;
}

main section:first-child h1 {
  font-size: 2rem;
  margin: 0 0 0.75rem 0;
  color: var(--color-primario);
}

main section:first-child p {
  margin: 0;
  color: var(--gris);
  font-size: 1.05rem;
}

/* ===== Grid de categorías / productos ===== */
#categorias > div,
#tintas-destacadas > div,
#tintas-negras > div,
#tintas-color > div,
#liners > div,
#shaders > div,
#packs-agujas > div,
#rotativas > div,
#bobina > div,
#accesorios-maquinas > div {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* ===== Cards (articles) ===== */
article {
  background: var(--fondo-hover);
  border: 1px solid var(--gris-claro);
  border-radius: var(--radio);
  padding: 2rem;
  box-shadow: var(--sombra);
  transition: box-shadow var(--transicion), border-color var(--transicion), transform var(--transicion);
}

article:hover {
  box-shadow: var(--sombra-hover);
  border-color: var(--color-secundario-suave);
  transform: translateY(-2px);
}

article h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primario);
}

article p {
  margin: 0 0 0.75rem 0;
  color: var(--gris);
  font-size: 0.95rem;
}

article p:last-of-type {
  margin-bottom: 0;
}

article strong {
  color: var(--color-primario);
}

article a {
  display: inline-block;
  margin-top: 0.75rem;
  color: var(--color-secundario);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transicion);
}

article a:hover {
  color: var(--color-secundario-hover);
  text-decoration: underline;
}

/* ===== Listas ===== */
#marcas ul {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  display: grid;
  gap: 0.75rem;
  max-width: 560px;
}

#marcas li {
  padding: 1rem 1.25rem;
  background: var(--blanco-hover);
  border-left: 4px solid var(--rojo);
  border-radius: 0 8px 8px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

#marcas li strong {
  color: var(--negro);
}

#seguridad ol {
  padding-left: 0;
  margin: 0 auto;
  list-style-position: inside;
  max-width: 640px;
}

#seguridad li {
  margin-bottom: 0.5rem;
  color: var(--gris);
}

/* ===== Ofertas (packs) ===== */
#ofertas {
  display: block;
  text-align: center;
}

#ofertas > h2 {
  display: inline-block;
}

#ofertas > div {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

#ofertas article {
  border: 2px solid var(--gris-claro);
}

#ofertas article:hover {
  border-color: var(--color-secundario);
}

.add-cart, #ofertas button {
  margin-top: 0.75rem;
  padding: 0.6rem 1.25rem;
  background: var(--color-secundario);
  color: var(--fondo-hover);
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color var(--transicion), transform var(--transicion);
}

.add-cart:hover, #ofertas button:hover {
  background: var(--color-secundario-hover);
  transform: scale(1.02);
}

/* ===== Opiniones ===== */
#opiniones > article {
  margin-bottom: 1rem;
}

#opiniones article:last-child {
  margin-bottom: 0;
}

#opiniones p {
  font-style: italic;
  color: var(--gris);
}

/* ===== Blog / consejos ===== */
#blog article {
  margin-bottom: 1rem;
}

#blog a {
  color: var(--color-secundario);
  font-weight: 600;
  text-decoration: none;
}

#blog a:hover {
  text-decoration: underline;
  color: var(--color-secundario-hover);
}

/* ===== FAQ (details/summary) ===== */
details {
  background: var(--fondo-hover);
  border: 1px solid var(--gris-claro);
  border-radius: var(--radio);
  margin: 0 auto 0.75rem;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  max-width: 700px;
  text-align: left;
}

summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-primario);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color var(--transicion);
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--rojo);
  font-weight: 700;
}

details[open] summary::after {
  content: "−";
}

details[open] summary {
  background: var(--color-secundario-suave);
  border-bottom: 1px solid var(--gris-claro);
}

details p {
  margin: 0;
  padding: 1rem 1.25rem 1.25rem;
  color: var(--gris);
  font-size: 0.95rem;
}

#faq > p a {
  color: var(--color-secundario);
  font-weight: 600;
  text-decoration: none;
}

#faq > p a:hover {
  text-decoration: underline;
}

/* ===== Formulario contacto ===== */
#contacto form {
  max-width: 500px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: center;
}

#contacto label {
  font-weight: 600;
  color: var(--color-primario);
}

#contacto input,
#contacto textarea {
  padding: 0.75rem 1rem;
  border: 2px solid var(--gris-claro);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transicion);
}

#contacto input:focus,
#contacto textarea:focus {
  outline: none;
  border-color: var(--color-secundario);
}

#contacto button[type="submit"] {
  padding: 0.85rem 1.5rem;
  background: var(--color-secundario);
  color: var(--fondo-hover);
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color var(--transicion), transform var(--transicion);
}

#contacto button[type="submit"]:hover {
  background: var(--color-secundario-hover);
  transform: scale(1.02);
}

/* ===== Footer ===== */
footer {
  background: var(--color-primario);
  color: var(--fondo);
  padding: 2rem;
  margin-top: 3rem;
  text-align: center;
}

footer p {
  margin: 0 0 1rem 0;
  color: var(--gris-claro);
  font-size: 0.9rem;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: center;
}

footer nav a {
  color: var(--blanco);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transicion);
}

footer nav a:hover {
  color: var(--rojo);
}

/* ===== Páginas internas: intro bajo el header ===== */
main > section:first-child {
  padding-top: 0.5rem;
}

/* ===== Listas de consejos (ul en sections) ===== */
section ul:not(#marcas ul) {
  padding-left: 0;
  margin: 0 auto;
  list-style-position: inside;
  color: var(--gris);
  max-width: 560px;
}

section ul li {
  margin-bottom: 0.5rem;
}

/* ===== Carrito de compras ===== */
#carrito-widget {
  position: relative;
  display: inline-block;
}

#btn-carrito {
  background: var(--color-secundario);
  color: var(--fondo-hover);
  border: none;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color var(--transicion);
}

#btn-carrito:hover {
  background: var(--color-secundario-hover);
}

#contador-carrito {
  background: #ff6b6b;
  color: white;
  border-radius: 50%;
  padding: 0.2rem 0.5rem;
  font-weight: 700;
  font-size: 0.8rem;
}

#panel-carrito {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--fondo-hover);
  border: 2px solid var(--gris-claro);
  border-radius: var(--radio);
  padding: 1.5rem;
  width: 350px;
  max-height: 500px;
  overflow-y: auto;
  box-shadow: var(--sombra-hover);
  margin-top: 0.5rem;
  z-index: 1000;
}

#panel-carrito h3 {
  margin: 0 0 1rem 0;
  color: var(--color-primario);
}

#panel-carrito.hidden {
  display: none;
}

.item-carrito {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  border-bottom: 1px solid var(--gris-claro);
  gap: 0.75rem;
}

.item-carrito span:first-child {
  flex: 1;
  color: var(--color-primario);
  font-weight: 500;
}

.item-carrito span:nth-child(2) {
  color: var(--color-secundario);
  font-weight: 600;
}

.btn-eliminar {
  background: #ff6b6b;
  color: white;
  border: none;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color var(--transicion);
}

.btn-eliminar:hover {
  background: #ff5252;
}

#total-carrito {
  padding: 1rem 0;
  border-top: 2px solid var(--gris-claro);
  color: var(--color-primario);
}

#total-carrito p {
  margin: 0.5rem 0 0 0;
}

#vaciar-carrito,
#pagar {
  width: 100%;
  padding: 0.75rem;
  margin-top: 0.75rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transicion);
}

#vaciar-carrito {
  background: var(--gris-claro);
  color: var(--color-primario);
}

#vaciar-carrito:hover {
  background: var(--gris);
  color: white;
}

#pagar {
  background: var(--color-secundario);
  color: var(--fondo-hover);
}

#pagar:hover {
  background: var(--color-secundario-hover);
}

.notificacion {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--color-secundario);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  box-shadow: var(--sombra-hover);
  z-index: 2000;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  header,
  main,
  body > p {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  header h1 {
    font-size: 1.4rem;
  }

  #categorias > div,
  #ofertas {
    grid-template-columns: 1fr;
  }
  #panel-carrito {
    width: 100vw;
    right: -1.25rem;
  }
}