/* =========================================
   1. DISEÑO UNIFICADO: VARIABLES Y RESET
   ========================================= */
:root {
    --color-primario: #0D9488;
    --fondo: #f8fafc;
    --blanco: #ffffff;
    --texto-principal: #334155;
    --texto-secundario: #64748b;
    --borde: #e2e8f0;
    --radio-borde: 12px;
    --sombra: 0 4px 12px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--fondo);
    color: var(--texto-principal);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* =========================================
   2. HEADER Y FOOTER (Común para todas las páginas)
   ========================================= */
header, footer {
    background-color: var(--blanco);
    border-bottom: 1px solid var(--borde);
    padding: 20px 0;
}
footer {
    border-bottom: none;
    border-top: 1px solid var(--borde);
    margin-top: auto;
    text-align: center;
    color: var(--texto-secundario);
}
.contenedor-nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--texto-principal);
    text-decoration: none;
}
.logo span {
    color: var(--color-primario);
}
nav a {
    color: var(--texto-secundario);
    text-decoration: none;
    margin-left: 25px;
    font-weight: 600;
}
.carrito-link {
    position: relative;
}
.carrito-contador {
    position: absolute;
    top: -8px;
    right: -15px;
    background-color: var(--color-primario);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.75rem;
    font-weight: bold;
}

/* =========================================
   3. ESTILOS PARA PÁGINA DE LOGIN (INTEGRADO)
   ========================================= */
.login-container {
    max-width: 450px;
    margin: 60px auto;
    padding: 40px;
    background: var(--blanco);
    border-radius: var(--radio-borde);
    box-shadow: var(--sombra);
    border: 1px solid var(--borde);
}
.login-titulo {
    text-align: center;
    margin-bottom: 30px;
    color: var(--texto-principal);
}
.error-msg {
    background: #fee2e2;
    color: #991b1b;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    border: 1px solid #fecaca;
}

/* =========================================
   4. ESTILOS PARA PANEL DE ADMINISTRACIÓN (INTEGRADO)
   ========================================= */
.admin-panel {
    max-width: 1200px;
    margin: 30px auto;
    padding: 20px;
}
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--borde);
    padding-bottom: 15px;
    margin-bottom: 20px;
}
.admin-header h1 {
    color: var(--texto-principal);
}
.admin-header a {
    color: #dc2626;
    text-decoration: none;
    font-weight: bold;
}
.admin-bienvenida {
    font-size: 1.2rem;
    color: var(--texto-secundario);
}
.admin-menu {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}
.menu-card {
    background: var(--blanco);
    padding: 25px;
    border-radius: var(--radio-borde);
    text-align: center;
    box-shadow: var(--sombra);
    transition: all 0.2s ease;
    text-decoration: none;
    color: var(--texto-principal);
    border: 1px solid var(--borde);
}
.menu-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border-color: var(--color-primario);
}
.menu-card h3 {
    margin-bottom: 10px;
    color: var(--color-primario);
}

/* =========================================
   5. ESTRUCTURA DE 2 COLUMNAS (CATÁLOGO)
   ========================================= */
.layout-dividido {
    display: grid;
    grid-template-columns: 280px 1fr;
    max-width: 1400px;
    margin: 40px auto;
    padding: 0 30px;
    gap: 40px;
    align-items: flex-start;
    flex: 1;
}
.panel-filtros {
    background: var(--blanco);
    border: 1px solid var(--borde);
    border-radius: var(--radio-borde);
    padding: 25px;
    position: sticky;
    top: 40px;
}
.panel-titulo {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--borde);
}
.grupo-form {
    margin-bottom: 20px;
}
.grupo-form label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--texto-secundario);
}
.input-moderno {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--borde);
    border-radius: 8px;
    font-size: 1rem;
    background-color: var(--fondo);
}
.input-moderno:focus {
    outline: none;
    border-color: var(--color-primario);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}
.btn-principal {
    width: 100%;
    padding: 12px;
    background-color: var(--color-primario);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
}

/* ... Estilos del catálogo ... */
.panel-resultados { min-width: 0; }
.resultados-header { margin-bottom: 20px; padding-bottom: 10px; border-bottom: 1px solid var(--borde); }
.grid-productos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
.card { background: var(--blanco); border: 1px solid var(--borde); border-radius: var(--radio-borde); overflow: hidden; }
.card-imagen { height: 200px; padding: 15px; display: flex; justify-content: center; align-items: center; }
.card-imagen img { max-width: 100%; max-height: 100%; object-fit: contain; }
.card-cuerpo { padding: 20px; text-align: left; border-top: 1px solid var(--borde); }
.card-titulo { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.card-precio { font-size: 1.2rem; font-weight: 700; color: var(--color-primario); }

/* =========================================
   6. PÁGINA DEL CARRITO (Tus Estilos)
   ========================================= */
.layout-carrito {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
    align-items: flex-start;
}
.titulo-pagina { font-size: 2rem; font-weight: 800; margin-bottom: 20px; grid-column: 1 / -1; }
.tabla-carrito {
    width: 100%; border-collapse: collapse; background: var(--blanco);
    border: 1px solid var(--borde); border-radius: var(--radio-borde);
    overflow: hidden; box-shadow: var(--sombra);
}
.tabla-carrito thead { background-color: var(--fondo); }
.tabla-carrito th {
    padding: 15px 20px; text-align: left; font-size: 0.8rem;
    color: var(--texto-secundario); text-transform: uppercase; letter-spacing: 1px;
}
.tabla-carrito td { padding: 20px; border-top: 1px solid var(--borde); }
.item-producto { display: flex; align-items: center; gap: 15px; }
.item-producto img {
    width: 60px; height: 60px; border: 1px solid var(--borde);
    border-radius: 8px; object-fit: contain;
}
.item-cantidad form { display: flex; align-items: center; gap: 5px; }
.input-cantidad-carrito { width: 60px; text-align: center; padding: 8px; border: 1px solid var(--borde); border-radius: 5px; }
.btn-actualizar, .btn-eliminar {
    padding: 8px; font-size: 0.8rem; border: none; border-radius: 5px;
    cursor: pointer; background: var(--fondo); color: var(--texto-secundario);
}
.btn-eliminar { background: #fee2e2; color: #991b1b; }
.resumen-compra {
    background: var(--blanco); border: 1px solid var(--borde);
    border-radius: var(--radio-borde); padding: 25px;
    box-shadow: var(--sombra); position: sticky; top: 40px;
}
.resumen-compra h3 { font-size: 1.2rem; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 1px solid var(--borde); }
.resumen-linea { display: flex; justify-content: space-between; margin-bottom: 10px; font-size: 1rem; color: var(--texto-secundario); }
.resumen-linea.total { font-size: 1.3rem; font-weight: bold; color: var(--texto-principal); margin-top: 20px; padding-top: 10px; border-top: 1px solid var(--borde); }
.btn-proceder {
    width: 100%; padding: 15px; background: var(--color-primario); color: white;
    border: none; border-radius: 8px; font-size: 1.1rem; font-weight: 600;
    cursor: pointer; margin-top: 20px; text-align: center; text-decoration: none; display: block;
}
.enlace-vaciar { display: block; text-align: center; margin-top: 15px; font-size: 0.9rem; color: #991b1b; }