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

body {
    font-family: Arial, sans-serif;
    background-color: #f4f1ed;
    color: #333;
}

header {
    background-color: #c8102e;
    color: white;
    padding: 25px;
    text-align: center;
}

main {
    max-width: 900px;
    margin: 50px auto;
    background-color: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

h2 {
    margin-bottom: 15px;
}

p {
    margin-bottom: 25px;
}

button {
    background-color: #c8102e;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #a50d25;
}

.boton {
    display: inline-block;
    background-color: #c8102e;
    color: white;
    text-decoration: none;
    padding: 12px 25px;
    border-radius: 8px;
    font-size: 16px;
}

.boton:hover {
    background-color: #a50d25;
}

form {
    max-width: 400px;
    margin: 30px auto 0;
    text-align: left;
}

form label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

form input {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 16px;
}

form button {
    width: 100%;
}

.menu-principal {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.opcion-menu {
    display: block;
    padding: 25px;
    background-color: #f8f8f8;
    border-radius: 15px;
    text-decoration: none;
    color: #333;
    border: 1px solid #ddd;
    transition: 0.2s;
}

.opcion-menu:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.10);
}

.opcion-menu h3 {
    font-size: 35px;
    margin-bottom: 10px;
}

.opcion-menu p {
    margin-top: 10px;
    margin-bottom: 0;
}

.deshabilitado {
    opacity: 0.55;
    cursor: default;
}

.deshabilitado:hover {
    transform: none;
    box-shadow: none;
}

/* ==========================================
   INVENTARIO
   ========================================== */

.inventario-contenedor {
    max-width: 1200px;
    margin: 40px auto;
    text-align: left;
}

.encabezado-inventario {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
}

.encabezado-inventario h2 {
    margin-bottom: 8px;
}

.encabezado-inventario p {
    margin-bottom: 0;
    color: #666;
}


/* Botón secundario */

.boton-secundario {
    display: inline-block;
    padding: 10px 18px;
    background-color: #eeeeee;
    color: #333;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
}

.boton-secundario:hover {
    background-color: #dddddd;
}


/* Tabla */

.tabla-contenedor {
    overflow-x: auto;
}

.tabla-inventario {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.tabla-inventario th {
    background-color: #c8102e;
    color: white;
    padding: 15px;
    text-align: left;
}

.tabla-inventario td {
    padding: 15px;
    border-bottom: 1px solid #eeeeee;
}

.tabla-inventario tbody tr:hover {
    background-color: #fafafa;
}


/* Cantidad */

.cantidad-inventario {
    font-size: 20px;
}


/* Estados */

.estado-inventario {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: bold;
}


/* Disponible */

.estado-disponible {
    color: #247a3d;
}

.estado-inventario.estado-disponible {
    background-color: #e5f5e9;
}


/* Stock bajo */

.estado-bajo {
    color: #a66a00;
}

.estado-inventario.estado-bajo {
    background-color: #fff2cc;
}


/* Agotado */

.estado-agotado {
    color: #a40000;
}

.estado-inventario.estado-agotado {
    background-color: #f8d7da;
}


.inventario-vacio {
    text-align: center;
    padding: 40px !important;
    color: #777;
}


.leyenda-inventario {
    display: flex;
    gap: 25px;
    margin-top: 20px;
    font-size: 14px;
}

.leyenda-inventario span::first-letter {
    font-size: 18px;
}

/* ==========================================
   VENTAS
   ========================================== */

.ventas-contenedor {
    max-width: 1200px;
    margin: 40px auto;
    text-align: left;
}

.encabezado-ventas {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
}

.encabezado-ventas h2 {
    margin-bottom: 8px;
}

.encabezado-ventas p {
    margin-bottom: 0;
    color: #666;
}

.acciones-ventas {
    display: flex;
    gap: 10px;
    align-items: center;
}


/* ==========================================
   TARJETAS DE RESUMEN
   ========================================== */

.resumen-ventas {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.tarjeta-resumen {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 22px;
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.icono-resumen {
    font-size: 32px;
}

.tarjeta-resumen p {
    margin: 0 0 5px 0;
    color: #666;
    font-size: 14px;
}

.tarjeta-resumen strong {
    font-size: 24px;
    color: #333;
}


/* ==========================================
   TABLA DE VENTAS
   ========================================== */

.tabla-ventas {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.tabla-ventas th {
    background-color: #c8102e;
    color: white;
    padding: 15px;
    text-align: left;
}

.tabla-ventas td {
    padding: 15px;
    border-bottom: 1px solid #eeeeee;
}

.tabla-ventas tbody tr:hover {
    background-color: #fafafa;
}

.tabla-ventas small {
    color: #666;
}

.ganancia {
    color: #247a3d;
    font-weight: bold;
}

.ventas-vacias {
    text-align: center;
    padding: 40px !important;
    color: #777;
}


@media (max-width: 900px) {

    .resumen-ventas {
        grid-template-columns: 1fr;
    }

    .encabezado-ventas {
        flex-direction: column;
        align-items: flex-start;
    }

    .tabla-contenedor {
        overflow-x: auto;
    }

}

.opcion-menu {
    cursor: pointer;
}

.opcion-menu strong {
    font-size: 20px;
}

.opcion-menu h3 {
    margin-top: 0;
}

.opcion-menu:not(.deshabilitado):hover {
    transform: translateY(-5px);
}

/* ==========================================
   VISTA PARA CELULAR
   ========================================== */

@media (max-width: 600px) {

    body {
        font-size: 16px;
    }

    header {
        padding: 25px 15px;
    }

    header h1 {
        font-size: 28px;
    }

    header p {
        font-size: 17px;
    }

    main {
        width: calc(100% - 24px);
        margin: 20px auto;
        padding: 20px;
        box-sizing: border-box;
    }

    .menu-principal {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .opcion-menu {
        padding: 20px;
    }

    .opcion-menu h3 {
        font-size: 30px;
    }

    .encabezado-inventario,
    .encabezado-ventas {
        flex-direction: column;
        align-items: flex-start;
    }

    .acciones-ventas {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .acciones-ventas a {
        text-align: center;
    }

    .resumen-ventas {
        grid-template-columns: 1fr;
    }

    .tabla-contenedor {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tabla-inventario,
    .tabla-ventas {
        min-width: 750px;
    }

    input,
    select,
    button {
        width: 100%;
        box-sizing: border-box;
    }

    .boton,
    .boton-secundario {
        text-align: center;
        box-sizing: border-box;
    }

}